AuroraMiddleware/gtk2
1
0
Fork 0
forked from AuroraMiddleware/gtk
Code Issues Pull Requests Projects Releases Wiki Activity
c5a60e035d
gtk2/gtk/gtkcellarea.c
Tristan Van Berkom 4c165de31f Added gtk-doc to GtkCellArea & GtkCellAreaContext.
2010-12-03 16:29:11 +09:00

3183 lines
97 KiB
C
Raw Blame History

/* gtkcellarea.c
*
* Copyright (C) 2010 Openismus GmbH
*
* Authors:
* Tristan Van Berkom <tristanvb@openismus.com>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
/**
* SECTION:gtkcellarea
* @Short_Description: An abstract class for laying out #GtkCellRenderers
* @Title: GtkCellArea
*
* The #GtkCellArea is an abstract class for #GtkCellLayout widgets (also referred
* to as "layouting widgets") to interface with an arbitrary number of #GtkCellRenderers
* and interact with the user for a given #GtkTreeModel row.
*
* The cell area handles events, focus navigation, drawing and wraps geometrical
* size requests and allocations for a given row of data.
*
* Usually users dont have to interact with the #GtkCellArea directly unless they
* are implementing a cell layouting widget themselves.
*
* <refsect2 id="cell-area-geometry-management">
* <title>Requesting area sizes</title>
* <para>
* As outlined in <link linkend="geometry-management">GtkWidget's
* geometry management section</link>, GTK+ uses a height-for-width
* geometry managemen system to compute the sizes of widgets and user
* interfaces. #GtkCellArea uses the same semantics to calculate the
* size of an area for an arbitrary number of #GtkTreeModel rows.
*
* When requesting the size of a cell area one needs to calculate
* the size for a handful of rows, this will be done differently by
* different layouting widgets. For instance a #GtkTreeViewColumn
* always lines up the areas from top to bottom while a #GtkIconView
* on the other hand might enforce that all areas received the same
* width and wrap the areas around, requesting height for more cell
* areas when allocated less width.
*
* It's also important for areas to maintain some cell
* alignments with areas rendered for adjacent rows (cells can
* appear "columnized" inside an area even when the size of
* cells are different in each row). For this reason the #GtkCellArea
* uses a #GtkCellAreaContext object to store the alignments
* and sizes along the way (as well as the overall largest minimum
* and natural size for all the rows which have been calculated
* with the said context).
*
* The #GtkCellAreaContext is an opaque object specific to the
* #GtkCellArea which created it (see gtk_cell_area_create_context()).
* The owning cell layouting widget can create as many contexts as
* it wishes to calculate sizes of rows which should receive the
* same size in at least one orientation (horizontally or vertically),
* however it's important that the same #GtkCellAreaContext which
* was used to request the sizes for a given #GtkTreeModel row be
* used when rendering or processing events for that row.
*
* In order to request the width of all the rows at the root level
* of a #GtkTreeModel one would do the following:
* <example>
* <title>Requesting the width of a hand full of GtkTreeModel rows.</title>
* <programlisting>
* GtkTreeIter iter;
* gint minimum_width;
* gint natural_width;
*
* valid = gtk_tree_model_get_iter_first (model, &iter);
* while (valid)
* {
* gtk_cell_area_apply_attributes (area, model, &iter, FALSE, FALSE);
* gtk_cell_area_get_preferred_width (area, context, widget, NULL, NULL);
*
* valid = gtk_tree_model_iter_next (model, &iter);
* }
* gtk_cell_area_context_get_preferred_width (context, &minimum_width, &natural_width);
* </programlisting>
* </example>
* Note that in this example it's not important to observe the returned minimum and
* natural width of the area for each row unless the cell layouting object is actually
* interested in the widths of individual rows. The overall width is however stored
* in the accompanying #GtkCellAreaContext object and can be consulted at any time.
*
* This can be useful since #GtkCellLayout widgets usually have to support requesting
* and rendering rows in treemodels with an exceedingly large amount of rows. The
* #GtkCellLayout widget in that case would calculate the required width of the rows
* in an idle or timeout source (see g_timeout_add()) and when the widget is requested
* its actual width in #GtkWidgetClass.get_preferred_width() it can simply consult the
* width accumulated so far in the #GtkCellAreaContext object.
*
* A simple example where rows are rendered from top to bottom and take up the full
* width of the layouting widget would look like:
* <example>
* <title>A typical #GtkWidgetClass.get_preferred_width() for a layouting widget.</title>
* <programlisting>
* static void
* foo_get_preferred_width (GtkWidget *widget,
* gint *minimum_size,
* gint *natural_size)
* {
* Foo *foo = FOO (widget);
* FooPrivate *priv = foo->priv;
*
* foo_ensure_at_least_one_handfull_of_rows_have_been_requested (foo);
*
* gtk_cell_area_context_get_preferred_width (priv->context, minimum_size, natural_size);
* }
* </programlisting>
* </example>
*
* In the above example the Foo widget has to make sure that some row sizes have
* been calculated (the amount of rows that Foo judged was appropriate to request
* space for in a single timeout iteration) before simply returning the amount
* of space required by the area via the #GtkCellAreaContext.
*
* Requesting the height for width (or width for height) of an area is a similar
* task except in this case the #GtkCellAreaContext does not store the data (actually
* it does not know how much space the layouting widget plans to allocate it for
* every row, it's up to the layouting widget to render each row of data with
* the appropriate height and width which was requested by the #GtkCellArea).
*
* In order to request the height for width of all the rows at the root level
* of a #GtkTreeModel one would do the following:
* <example>
* <title>Requesting the height for width of a hand full of GtkTreeModel rows.</title>
* <programlisting>
* GtkTreeIter iter;
* gint minimum_height;
* gint natural_height;
* gint full_minimum_height = 0;
* gint full_natural_height = 0;
*
* valid = gtk_tree_model_get_iter_first (model, &iter);
* while (valid)
* {
* gtk_cell_area_apply_attributes (area, model, &iter, FALSE, FALSE);
* gtk_cell_area_get_preferred_height_for_width (area, context, widget,
* width, &minimum_height, &natural_height);
*
* if (width_is_for_allocation)
* cache_row_height (&iter, minimum_height, natural_height);
*
* full_minimum_height += minimum_height;
* full_natural_height += natural_height;
*
* valid = gtk_tree_model_iter_next (model, &iter);
* }
* </programlisting>
* </example>
*
* Note that in the above example we would need to cache the heights returned for each
* treemodel row so that we would know what sizes to render the areas for each row. However
* we would only want to really cache the heights if the request is intended for the
* layouting widgets real allocation.
*
* In some cases the layouting widget is requested the height for an arbitrary for_width,
* this is a special case for layouting widgets who need to request size for tens of thousands
* of treemodel rows. For this case it's only important that the layouting widget calculate
* one reasonably sized chunk of rows and return that height synchronously. The reasoning here
* is that any layouting widget is at least capable of synchronously calculating enough
* height to fill the screen height (or scrolled window height) in response to a single call to
* #GtkWidgetClass.get_preferred_height_for_width(). Returning a perfect height for width that
* is larger than the screen area is inconsequential since after the layouting receives an
* allocation from a scrolled window it simply continues to drive the the scrollbar
* values while more and mode height is required for the row heights that are calculated
* in the background.
* </para>
* </refsect2>
* <refsect2 id="cell-area-rendering">
* <title>Rendering Areas</title>
* <para>
* Once area sizes have been aquired at least for the rows in the visible area of the
* layouting widget they can be rendered at #GtkWidgetClass.draw() time.
*
* A crued example of how to render all the rows at the root level runs as follows:
* <example>
* <title>Requesting the width of a hand full of GtkTreeModel rows.</title>
* <programlisting>
* GtkAllocation allocation;
* GdkRectangle cell_area = { 0, };
* GtkTreeIter iter;
* gint minimum_width;
* gint natural_width;
*
* gtk_widget_get_allocation (widget, &allocation);
* cell_area.width = allocation.width;
*
* valid = gtk_tree_model_get_iter_first (model, &iter);
* while (valid)
* {
* cell_area.height = get_cached_height_for_row (&iter);
*
* gtk_cell_area_apply_attributes (area, model, &iter, FALSE, FALSE);
* gtk_cell_area_render (area, context, widget, cr,
* &cell_area, &cell_area, state_flags, FALSE);
*
* cell_area.y += cell_area.height;
*
* valid = gtk_tree_model_iter_next (model, &iter);
* }
* </programlisting>
* </example>
* Note that the cached height in this example really depends on how the layouting
* widget works. The layouting widget might decide to give every row it's minimum
* or natural height or if the model content is expected to fit inside the layouting
* widget with no scrolled window it would make sense to calculate the allocation
* for each row at #GtkWidget.size_allocate() time using gtk_distribute_natural_allocation().
* </para>
* </refsect2>
* <refsect2 id="cell-area-events-and-focus">
* <title>Handling Events and Driving Keyboard Focus</title>
* <para>
* Passing events to the area is as simple as handling events on any normal
* widget and then passing them to the gtk_cell_area_event() api as they come
* in. Usually #GtkCellArea is only interested in button events, however some
* customized derived areas can be implemented who are interested in handling
* other events. Handling an event can trigger the #GtkCellArea::focus-changed
* signal to fire as well as #GtkCellArea::add-editable in the case that
* an editable cell was clicked and needs to start editing.
*
* The #GtkCellArea drives keyboard focus from cell to cell in a way similar
* to #GtkWidget. For layouting widgets that support giving focus to cells it's
* important to remember to pass %GTK_CELL_RENDERER_FOCUSED to the area functions
* for the row that has focus and to tell the area to paint the focus at render
* time.
*
* Layouting widgets that accept focus on cells should implement the #GtkWidgetClass.focus()
* virtual method. The layouting widget is always responsible for knowing where
* #GtkTreeModel rows are rendered inside the widget, so at #GtkWidgetClass.focus() time
* the layouting widget should use the #GtkCellArea methods to navigate focus inside the
* area and then observe the GtkDirectionType to pass the focus to adjacent rows and
* areas.
*
* A basic example of how the #GtkWidgetClass.focus() virtual method should be implemented:
* <example>
* <title>Implementing keyboard focus navigation when displaying rows from top to bottom.</title>
* <programlisting>
* static gboolean
* foo_focus (GtkWidget *widget,
* GtkDirectionType direction)
* {
* Foo *foo = FOO (widget);
* FooPrivate *priv = foo->priv;
* gint focus_row;
* gboolean have_focus = FALSE;
*
* focus_row = priv->focus_row;
*
* if (!gtk_widget_has_focus (widget))
* gtk_widget_grab_focus (widget);
*
* valid = gtk_tree_model_iter_nth_child (priv->model, &iter, NULL, priv->focus_row);
* while (valid)
* {
* gtk_cell_area_apply_attributes (priv->area, priv->model, &iter, FALSE, FALSE);
*
* if (gtk_cell_area_focus (priv->area, direction))
* {
* priv->focus_row = focus_row;
* have_focus = TRUE;
* break;
* }
* else
* {
* if (direction == GTK_DIR_RIGHT ||
* direction == GTK_DIR_LEFT)
* break;
* else if (direction == GTK_DIR_UP ||
* direction == GTK_DIR_TAB_BACKWARD)
* {
* if (focus_row == 0)
* break;
* else
* {
* focus_row--;
* valid = gtk_tree_model_iter_nth_child (priv->model, &iter, NULL, focus_row);
* }
* }
* else
* {
* if (focus_row == last_row)
* break;
* else
* {
* focus_row++;
* valid = gtk_tree_model_iter_next (priv->model, &iter);
* }
* }
* }
* }
* return have_focus;
* }
* </programlisting>
* </example>
* </para>
* </refsect2>
*
*/
#include "config.h"
#include <stdarg.h>
#include <string.h>
#include <stdlib.h>
#include "gtkintl.h"
#include "gtkcelllayout.h"
#include "gtkcellarea.h"
#include "gtkcellareacontext.h"
#include "gtkmarshalers.h"
#include "gtkprivate.h"
#include <gobject/gvaluecollector.h>
/* GObjectClass */
static void gtk_cell_area_dispose (GObject *object);
static void gtk_cell_area_finalize (GObject *object);
static void gtk_cell_area_set_property (GObject *object,
guint prop_id,
const GValue *value,
GParamSpec *pspec);
static void gtk_cell_area_get_property (GObject *object,
guint prop_id,
GValue *value,
GParamSpec *pspec);
/* GtkCellAreaClass */
static gint gtk_cell_area_real_event (GtkCellArea *area,
GtkCellAreaContext *context,
GtkWidget *widget,
GdkEvent *event,
const GdkRectangle *cell_area,
GtkCellRendererState flags);
static void gtk_cell_area_real_apply_attributes (GtkCellArea *area,
GtkTreeModel *tree_model,
GtkTreeIter *iter,
gboolean is_expander,
gboolean is_expanded);
static void gtk_cell_area_real_get_preferred_height_for_width (GtkCellArea *area,
GtkCellAreaContext *context,
GtkWidget *widget,
gint width,
gint *minimum_height,
gint *natural_height);
static void gtk_cell_area_real_get_preferred_width_for_height (GtkCellArea *area,
GtkCellAreaContext *context,
GtkWidget *widget,
gint height,
gint *minimum_width,
gint *natural_width);
static gboolean gtk_cell_area_real_is_activatable (GtkCellArea *area);
static gboolean gtk_cell_area_real_activate (GtkCellArea *area,
GtkCellAreaContext *context,
GtkWidget *widget,
const GdkRectangle *cell_area,
GtkCellRendererState flags);
/* GtkCellLayoutIface */
static void gtk_cell_area_cell_layout_init (GtkCellLayoutIface *iface);
static void gtk_cell_area_pack_default (GtkCellLayout *cell_layout,
GtkCellRenderer *renderer,
gboolean expand);
static void gtk_cell_area_clear (GtkCellLayout *cell_layout);
static void gtk_cell_area_add_attribute (GtkCellLayout *cell_layout,
GtkCellRenderer *renderer,
const gchar *attribute,
gint column);
static void gtk_cell_area_set_cell_data_func (GtkCellLayout *cell_layout,
GtkCellRenderer *cell,
GtkCellLayoutDataFunc func,
gpointer func_data,
GDestroyNotify destroy);
static void gtk_cell_area_clear_attributes (GtkCellLayout *cell_layout,
GtkCellRenderer *renderer);
static void gtk_cell_area_reorder (GtkCellLayout *cell_layout,
GtkCellRenderer *cell,
gint position);
static GList *gtk_cell_area_get_cells (GtkCellLayout *cell_layout);
/* Used in forall loop to check if a child renderer is present */
typedef struct {
GtkCellRenderer *renderer;
gboolean has_renderer;
} HasRendererCheck;
/* Attribute/Cell metadata */
typedef struct {
const gchar *attribute;
gint column;
} CellAttribute;
typedef struct {
GSList *attributes;
GtkCellLayoutDataFunc func;
gpointer data;
GDestroyNotify destroy;
} CellInfo;
static CellInfo *cell_info_new (GtkCellLayoutDataFunc func,
gpointer data,
GDestroyNotify destroy);
static void cell_info_free (CellInfo *info);
static CellAttribute *cell_attribute_new (GtkCellRenderer *renderer,
const gchar *attribute,
gint column);
static void cell_attribute_free (CellAttribute *attribute);
static gint cell_attribute_find (CellAttribute *cell_attribute,
const gchar *attribute);
/* Internal functions/signal emissions */
static void gtk_cell_area_add_editable (GtkCellArea *area,
GtkCellRenderer *renderer,
GtkCellEditable *editable,
GdkRectangle *cell_area);
static void gtk_cell_area_remove_editable (GtkCellArea *area,
GtkCellRenderer *renderer,
GtkCellEditable *editable);
static void gtk_cell_area_set_edit_widget (GtkCellArea *area,
GtkCellEditable *editable);
static void gtk_cell_area_set_edited_cell (GtkCellArea *area,
GtkCellRenderer *renderer);
/* Struct to pass data along while looping over
* cell renderers to apply attributes
*/
typedef struct {
GtkCellArea *area;
GtkTreeModel *model;
GtkTreeIter *iter;
gboolean is_expander;
gboolean is_expanded;
} AttributeData;
struct _GtkCellAreaPrivate
{
/* The GtkCellArea bookkeeps any connected
* attributes in this hash table.
*/
GHashTable *cell_info;
/* Current path is saved as a side-effect
* of gtk_cell_area_apply_attributes() */
gchar *current_path;
/* Current cell being edited and editable widget used */
GtkCellEditable *edit_widget;
GtkCellRenderer *edited_cell;
/* Signal connections to the editable widget */
gulong remove_widget_id;
/* Currently focused cell */
GtkCellRenderer *focus_cell;
/* Tracking which cells are focus siblings of focusable cells */
GHashTable *focus_siblings;
/* Detail string to pass to gtk_paint_*() functions */
gchar *style_detail;
};
enum {
PROP_0,
PROP_FOCUS_CELL,
PROP_EDITED_CELL,
PROP_EDIT_WIDGET
};
enum {
SIGNAL_APPLY_ATTRIBUTES,
SIGNAL_ADD_EDITABLE,
SIGNAL_REMOVE_EDITABLE,
SIGNAL_FOCUS_CHANGED,
LAST_SIGNAL
};
/* Keep the paramspec pool internal, no need to deliver notifications
* on cells. at least no percieved need for now */
static GParamSpecPool *cell_property_pool = NULL;
static guint cell_area_signals[LAST_SIGNAL] = { 0 };
#define PARAM_SPEC_PARAM_ID(pspec) ((pspec)->param_id)
#define PARAM_SPEC_SET_PARAM_ID(pspec, id) ((pspec)->param_id = (id))
G_DEFINE_ABSTRACT_TYPE_WITH_CODE (GtkCellArea, gtk_cell_area, G_TYPE_INITIALLY_UNOWNED,
G_IMPLEMENT_INTERFACE (GTK_TYPE_CELL_LAYOUT,
gtk_cell_area_cell_layout_init));
static void
gtk_cell_area_init (GtkCellArea *area)
{
GtkCellAreaPrivate *priv;
area->priv = G_TYPE_INSTANCE_GET_PRIVATE (area,
GTK_TYPE_CELL_AREA,
GtkCellAreaPrivate);
priv = area->priv;
priv->cell_info = g_hash_table_new_full (g_direct_hash,
g_direct_equal,
NULL,
(GDestroyNotify)cell_info_free);
priv->focus_siblings = g_hash_table_new_full (g_direct_hash,
g_direct_equal,
NULL,
(GDestroyNotify)g_list_free);
priv->focus_cell = NULL;
priv->edited_cell = NULL;
priv->edit_widget = NULL;
priv->remove_widget_id = 0;
}
static void
gtk_cell_area_class_init (GtkCellAreaClass *class)
{
GObjectClass *object_class = G_OBJECT_CLASS (class);
/* GObjectClass */
object_class->dispose = gtk_cell_area_dispose;
object_class->finalize = gtk_cell_area_finalize;
object_class->get_property = gtk_cell_area_get_property;
object_class->set_property = gtk_cell_area_set_property;
/* general */
class->add = NULL;
class->remove = NULL;
class->forall = NULL;
class->event = gtk_cell_area_real_event;
class->render = NULL;
class->apply_attributes = gtk_cell_area_real_apply_attributes;
/* geometry */
class->create_context = NULL;
class->get_request_mode = NULL;
class->get_preferred_width = NULL;
class->get_preferred_height = NULL;
class->get_preferred_height_for_width = gtk_cell_area_real_get_preferred_height_for_width;
class->get_preferred_width_for_height = gtk_cell_area_real_get_preferred_width_for_height;
/* focus */
class->is_activatable = gtk_cell_area_real_is_activatable;
class->activate = gtk_cell_area_real_activate;
class->focus = NULL;
/* Signals */
/**
* GtkCellArea::apply-attributes:
* @area: the #GtkCellArea to apply the attributes to
* @model: the #GtkTreeModel to apply the attributes from
* @iter: the #GtkTreeIter indicating which row to apply the attributes of
* @is_expander: whether the view shows children for this row
* @is_expanded: whether the view is currently showing the children of this row
*
* This signal is emitted whenever applying attributes to @area from @model
*
* Since: 3.0
*/
cell_area_signals[SIGNAL_APPLY_ATTRIBUTES] =
g_signal_new (I_("apply-attributes"),
G_OBJECT_CLASS_TYPE (object_class),
G_SIGNAL_RUN_FIRST,
G_STRUCT_OFFSET (GtkCellAreaClass, apply_attributes),
NULL, NULL,
_gtk_marshal_VOID__OBJECT_BOXED_BOOLEAN_BOOLEAN,
G_TYPE_NONE, 4,
GTK_TYPE_TREE_MODEL,
GTK_TYPE_TREE_ITER,
G_TYPE_BOOLEAN,
G_TYPE_BOOLEAN);
/**
* GtkCellArea::add-editable:
* @area: the #GtkCellArea where editing started
* @renderer: the #GtkCellRenderer that started the edited
* @editable: the #GtkCellEditable widget to add
* @cell_area: the #GtkWidget relative #GdkRectangle coordinates
* where @editable should be added
* @path: the #GtkTreePath string this edit was initiated for
*
* Indicates that editing has started on @renderer and that @editable
* should be added to the owning cell layouting widget at @cell_area.
*
* Since: 3.0
*/
cell_area_signals[SIGNAL_ADD_EDITABLE] =
g_signal_new (I_("add-editable"),
G_OBJECT_CLASS_TYPE (object_class),
G_SIGNAL_RUN_FIRST,
0, /* No class closure here */
NULL, NULL,
_gtk_marshal_VOID__OBJECT_OBJECT_BOXED_STRING,
G_TYPE_NONE, 4,
GTK_TYPE_CELL_RENDERER,
GTK_TYPE_CELL_EDITABLE,
GDK_TYPE_RECTANGLE,
G_TYPE_STRING);
/**
* GtkCellArea::remove-editable:
* @area: the #GtkCellArea where editing finished
* @renderer: the #GtkCellRenderer that finished editeding
* @editable: the #GtkCellEditable widget to remove
*
* Indicates that editing finished on @renderer and that @editable
* should be removed from the owning cell layouting widget.
*
* Since: 3.0
*/
cell_area_signals[SIGNAL_REMOVE_EDITABLE] =
g_signal_new (I_("remove-editable"),
G_OBJECT_CLASS_TYPE (object_class),
G_SIGNAL_RUN_FIRST,
0, /* No class closure here */
NULL, NULL,
_gtk_marshal_VOID__OBJECT_OBJECT,
G_TYPE_NONE, 2,
GTK_TYPE_CELL_RENDERER,
GTK_TYPE_CELL_EDITABLE);
/**
* GtkCellArea::focus-changed:
* @area: the #GtkCellArea where focus changed
* @renderer: the #GtkCellRenderer that has focus
* @path: the current #GtkTreePath string set for @area
*
* Indicates that focus changed on this @area. This signal
* is emitted either as a result of focus handling or event
* handling.
*
* It's possible that the signal is emitted even if the
* currently focused renderer did not change, this is
* because focus may change to the same renderer in the
* same cell area for a different row of data.
*
* Since: 3.0
*/
cell_area_signals[SIGNAL_FOCUS_CHANGED] =
g_signal_new (I_("focus-changed"),
G_OBJECT_CLASS_TYPE (object_class),
G_SIGNAL_RUN_FIRST,
0, /* No class closure here */
NULL, NULL,
_gtk_marshal_VOID__OBJECT_STRING,
G_TYPE_NONE, 2,
GTK_TYPE_CELL_RENDERER,
G_TYPE_STRING);
/* Properties */
/**
* GtkCellArea:focus-cell:
*
* The cell in the area that currently has focus
*
* Since: 3.0
*/
g_object_class_install_property (object_class,
PROP_FOCUS_CELL,
g_param_spec_object
("focus-cell",
P_("Focus Cell"),
P_("The cell which currently has focus"),
GTK_TYPE_CELL_RENDERER,
GTK_PARAM_READWRITE));
/**
* GtkCellArea:edited-cell:
*
* The cell in the area that is currently edited
*
* This property is read-only and only changes as
* a result of a call gtk_cell_area_activate_cell().
*
* Since: 3.0
*/
g_object_class_install_property (object_class,
PROP_EDITED_CELL,
g_param_spec_object
("edited-cell",
P_("Edited Cell"),
P_("The cell which is currently being edited"),
GTK_TYPE_CELL_RENDERER,
G_PARAM_READABLE));
/**
* GtkCellArea:edit-widget:
*
* The widget currently editing the edited cell
*
* This property is read-only and only changes as
* a result of a call gtk_cell_area_activate_cell().
*
* Since: 3.0
*/
g_object_class_install_property (object_class,
PROP_EDIT_WIDGET,
g_param_spec_object
("edit-widget",
P_("Edit Widget"),
P_("The widget currently editing the edited cell"),
GTK_TYPE_CELL_RENDERER,
G_PARAM_READABLE));
/* Pool for Cell Properties */
if (!cell_property_pool)
cell_property_pool = g_param_spec_pool_new (FALSE);
g_type_class_add_private (object_class, sizeof (GtkCellAreaPrivate));
}
/*************************************************************
* CellInfo Basics *
*************************************************************/
static CellInfo *
cell_info_new (GtkCellLayoutDataFunc func,
gpointer data,
GDestroyNotify destroy)
{
CellInfo *info = g_slice_new0 (CellInfo);
info->func = func;
info->data = data;
info->destroy = destroy;
return info;
}
static void
cell_info_free (CellInfo *info)
{
if (info->destroy)
info->destroy (info->data);
g_slist_foreach (info->attributes, (GFunc)cell_attribute_free, NULL);
g_slist_free (info->attributes);
g_slice_free (CellInfo, info);
}
static CellAttribute *
cell_attribute_new (GtkCellRenderer *renderer,
const gchar *attribute,
gint column)
{
GParamSpec *pspec;
/* Check if the attribute really exists and point to
* the property string installed on the cell renderer
* class (dont dup the string)
*/
pspec = g_object_class_find_property (G_OBJECT_GET_CLASS (renderer), attribute);
if (pspec)
{
CellAttribute *cell_attribute = g_slice_new (CellAttribute);
cell_attribute->attribute = pspec->name;
cell_attribute->column = column;
return cell_attribute;
}
return NULL;
}
static void
cell_attribute_free (CellAttribute *attribute)
{
g_slice_free (CellAttribute, attribute);
}
/* GCompareFunc for g_slist_find_custom() */
static gint
cell_attribute_find (CellAttribute *cell_attribute,
const gchar *attribute)
{
return g_strcmp0 (cell_attribute->attribute, attribute);
}
/*************************************************************
* GObjectClass *
*************************************************************/
static void
gtk_cell_area_finalize (GObject *object)
{
GtkCellArea *area = GTK_CELL_AREA (object);
GtkCellAreaPrivate *priv = area->priv;
/* All cell renderers should already be removed at this point,
* just kill our (empty) hash tables here.
*/
g_hash_table_destroy (priv->cell_info);
g_hash_table_destroy (priv->focus_siblings);
g_free (priv->current_path);
G_OBJECT_CLASS (gtk_cell_area_parent_class)->finalize (object);
}
static void
gtk_cell_area_dispose (GObject *object)
{
/* This removes every cell renderer that may be added to the GtkCellArea,
* subclasses should be breaking references to the GtkCellRenderers
* at this point.
*/
gtk_cell_layout_clear (GTK_CELL_LAYOUT (object));
/* Remove any ref to a focused/edited cell */
gtk_cell_area_set_focus_cell (GTK_CELL_AREA (object), NULL);
gtk_cell_area_set_edited_cell (GTK_CELL_AREA (object), NULL);
gtk_cell_area_set_edit_widget (GTK_CELL_AREA (object), NULL);
G_OBJECT_CLASS (gtk_cell_area_parent_class)->dispose (object);
}
static void
gtk_cell_area_set_property (GObject *object,
guint prop_id,
const GValue *value,
GParamSpec *pspec)
{
GtkCellArea *area = GTK_CELL_AREA (object);
switch (prop_id)
{
case PROP_FOCUS_CELL:
gtk_cell_area_set_focus_cell (area, (GtkCellRenderer *)g_value_get_object (value));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gtk_cell_area_get_property (GObject *object,
guint prop_id,
GValue *value,
GParamSpec *pspec)
{
GtkCellArea *area = GTK_CELL_AREA (object);
GtkCellAreaPrivate *priv = area->priv;
switch (prop_id)
{
case PROP_FOCUS_CELL:
g_value_set_object (value, priv->focus_cell);
break;
case PROP_EDITED_CELL:
g_value_set_object (value, priv->edited_cell);
break;
case PROP_EDIT_WIDGET:
g_value_set_object (value, priv->edit_widget);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
/*************************************************************
* GtkCellAreaClass *
*************************************************************/
static gint
gtk_cell_area_real_event (GtkCellArea *area,
GtkCellAreaContext *context,
GtkWidget *widget,
GdkEvent *event,
const GdkRectangle *cell_area,
GtkCellRendererState flags)
{
GtkCellAreaPrivate *priv = area->priv;
if (event->type == GDK_KEY_PRESS && (flags & GTK_CELL_RENDERER_FOCUSED) != 0)
{
GdkEventKey *key_event = (GdkEventKey *)event;
/* Cancel any edits in progress */
if (priv->edited_cell && (key_event->keyval == GDK_KEY_Escape))
{
gtk_cell_area_stop_editing (area, TRUE);
return TRUE;
}
}
return FALSE;
}
static void
apply_cell_attributes (GtkCellRenderer *renderer,
CellInfo *info,
AttributeData *data)
{
CellAttribute *attribute;
GSList *list;
GValue value = { 0, };
gboolean is_expander;
gboolean is_expanded;
g_object_freeze_notify (G_OBJECT (renderer));
/* Whether a row expands or is presently expanded can only be
* provided by the view (as these states can vary across views
* accessing the same model).
*/
g_object_get (renderer, "is-expander", &is_expander, NULL);
if (is_expander != data->is_expander)
g_object_set (renderer, "is-expander", data->is_expander, NULL);
g_object_get (renderer, "is-expanded", &is_expanded, NULL);
if (is_expanded != data->is_expanded)
g_object_set (renderer, "is-expanded", data->is_expanded, NULL);
/* Apply the attributes directly to the renderer */
for (list = info->attributes; list; list = list->next)
{
attribute = list->data;
gtk_tree_model_get_value (data->model, data->iter, attribute->column, &value);
g_object_set_property (G_OBJECT (renderer), attribute->attribute, &value);
g_value_unset (&value);
}
/* Call any GtkCellLayoutDataFunc that may have been set by the user
*/
if (info->func)
info->func (GTK_CELL_LAYOUT (data->area), renderer,
data->model, data->iter, info->data);
g_object_thaw_notify (G_OBJECT (renderer));
}
static void
gtk_cell_area_real_apply_attributes (GtkCellArea *area,
GtkTreeModel *tree_model,
GtkTreeIter *iter,
gboolean is_expander,
gboolean is_expanded)
{
GtkCellAreaPrivate *priv;
AttributeData data;
GtkTreePath *path;
priv = area->priv;
/* Feed in data needed to apply to every renderer */
data.area = area;
data.model = tree_model;
data.iter = iter;
data.is_expander = is_expander;
data.is_expanded = is_expanded;
/* Go over any cells that have attributes or custom GtkCellLayoutDataFuncs and
* apply the data from the treemodel */
g_hash_table_foreach (priv->cell_info, (GHFunc)apply_cell_attributes, &data);
/* Update the currently applied path */
g_free (priv->current_path);
path = gtk_tree_model_get_path (tree_model, iter);
priv->current_path = gtk_tree_path_to_string (path);
gtk_tree_path_free (path);
}
static void
gtk_cell_area_real_get_preferred_height_for_width (GtkCellArea *area,
GtkCellAreaContext *context,
GtkWidget *widget,
gint width,
gint *minimum_height,
gint *natural_height)
{
/* If the area doesnt do height-for-width, fallback on base preferred height */
GTK_CELL_AREA_GET_CLASS (area)->get_preferred_width (area, context, widget, minimum_height, natural_height);
}
static void
gtk_cell_area_real_get_preferred_width_for_height (GtkCellArea *area,
GtkCellAreaContext *context,
GtkWidget *widget,
gint height,
gint *minimum_width,
gint *natural_width)
{
/* If the area doesnt do width-for-height, fallback on base preferred width */
GTK_CELL_AREA_GET_CLASS (area)->get_preferred_width (area, context, widget, minimum_width, natural_width);
}
static void
get_is_activatable (GtkCellRenderer *renderer,
gboolean *activatable)
{
if (gtk_cell_renderer_is_activatable (renderer))
*activatable = TRUE;
}
static gboolean
gtk_cell_area_real_is_activatable (GtkCellArea *area)
{
gboolean activatable = FALSE;
/* Checks if any renderer can focus for the currently applied
* attributes.
*
* Subclasses can override this in the case that they are also
* rendering widgets as well as renderers.
*/
gtk_cell_area_forall (area, (GtkCellCallback)get_is_activatable, &activatable);
return activatable;
}
static gboolean
gtk_cell_area_real_activate (GtkCellArea *area,
GtkCellAreaContext *context,
GtkWidget *widget,
const GdkRectangle *cell_area,
GtkCellRendererState flags)
{
GtkCellAreaPrivate *priv = area->priv;
GdkRectangle background_area;
GtkCellRenderer *activate_cell = NULL;
if (priv->focus_cell)
activate_cell = priv->focus_cell;
else
{
GList *cells, *l;
/* GtkTreeView sometimes wants to activate a cell when no
* cells are in focus.
*/
cells = gtk_cell_layout_get_cells (GTK_CELL_LAYOUT (area));
for (l = cells; l && !activate_cell; l = l->next)
{
GtkCellRenderer *renderer = l->data;
if (gtk_cell_renderer_is_activatable (renderer))
activate_cell = renderer;
}
g_list_free (cells);
}
if (activate_cell)
{
/* Get the allocation of the focused cell.
*/
gtk_cell_area_get_cell_allocation (area, context, widget, activate_cell,
cell_area, &background_area);
/* Activate or Edit the cell
*
* Currently just not sending an event, renderers afaics dont use
* the event argument anyway, worst case is we can synthesize one.
*/
if (gtk_cell_area_activate_cell (area, widget, activate_cell, NULL,
&background_area, flags))
return TRUE;
}
return FALSE;
}
/*************************************************************
* GtkCellLayoutIface *
*************************************************************/
static void
gtk_cell_area_cell_layout_init (GtkCellLayoutIface *iface)
{
iface->pack_start = gtk_cell_area_pack_default;
iface->pack_end = gtk_cell_area_pack_default;
iface->clear = gtk_cell_area_clear;
iface->add_attribute = gtk_cell_area_add_attribute;
iface->set_cell_data_func = gtk_cell_area_set_cell_data_func;
iface->clear_attributes = gtk_cell_area_clear_attributes;
iface->reorder = gtk_cell_area_reorder;
iface->get_cells = gtk_cell_area_get_cells;
}
static void
gtk_cell_area_pack_default (GtkCellLayout *cell_layout,
GtkCellRenderer *renderer,
gboolean expand)
{
gtk_cell_area_add (GTK_CELL_AREA (cell_layout), renderer);
}
static void
gtk_cell_area_clear (GtkCellLayout *cell_layout)
{
GtkCellArea *area = GTK_CELL_AREA (cell_layout);
GList *l, *cells =
gtk_cell_layout_get_cells (cell_layout);
for (l = cells; l; l = l->next)
{
GtkCellRenderer *renderer = l->data;
gtk_cell_area_remove (area, renderer);
}
g_list_free (cells);
}
static void
gtk_cell_area_add_attribute (GtkCellLayout *cell_layout,
GtkCellRenderer *renderer,
const gchar *attribute,
gint column)
{
gtk_cell_area_attribute_connect (GTK_CELL_AREA (cell_layout),
renderer, attribute, column);
}
static void
gtk_cell_area_set_cell_data_func (GtkCellLayout *cell_layout,
GtkCellRenderer *renderer,
GtkCellLayoutDataFunc func,
gpointer func_data,
GDestroyNotify destroy)
{
GtkCellArea *area = GTK_CELL_AREA (cell_layout);
GtkCellAreaPrivate *priv = area->priv;
CellInfo *info;
info = g_hash_table_lookup (priv->cell_info, renderer);
if (info)
{
if (info->destroy && info->data)
info->destroy (info->data);
if (func)
{
info->func = func;
info->data = func_data;
info->destroy = destroy;
}
else
{
info->func = NULL;
info->data = NULL;
info->destroy = NULL;
}
}
else
{
info = cell_info_new (func, func_data, destroy);
g_hash_table_insert (priv->cell_info, renderer, info);
}
}
static void
gtk_cell_area_clear_attributes (GtkCellLayout *cell_layout,
GtkCellRenderer *renderer)
{
GtkCellArea *area = GTK_CELL_AREA (cell_layout);
GtkCellAreaPrivate *priv = area->priv;
CellInfo *info;
info = g_hash_table_lookup (priv->cell_info, renderer);
if (info)
{
g_slist_foreach (info->attributes, (GFunc)cell_attribute_free, NULL);
g_slist_free (info->attributes);
info->attributes = NULL;
}
}
static void
gtk_cell_area_reorder (GtkCellLayout *cell_layout,
GtkCellRenderer *cell,
gint position)
{
g_warning ("GtkCellLayout::reorder not implemented for `%s'",
g_type_name (G_TYPE_FROM_INSTANCE (cell_layout)));
}
static void
accum_cells (GtkCellRenderer *renderer,
GList **accum)
{
*accum = g_list_prepend (*accum, renderer);
}
static GList *
gtk_cell_area_get_cells (GtkCellLayout *cell_layout)
{
GList *cells = NULL;
gtk_cell_area_forall (GTK_CELL_AREA (cell_layout),
(GtkCellCallback)accum_cells,
&cells);
return g_list_reverse (cells);
}
/*************************************************************
* API *
*************************************************************/
/**
* gtk_cell_area_add:
* @area: a #GtkCellArea
* @renderer: the #GtkCellRenderer to add to @area
*
* Adds @renderer to @area with the default child cell properties.
*
* Since: 3.0
*/
void
gtk_cell_area_add (GtkCellArea *area,
GtkCellRenderer *renderer)
{
GtkCellAreaClass *class;
g_return_if_fail (GTK_IS_CELL_AREA (area));
g_return_if_fail (GTK_IS_CELL_RENDERER (renderer));
class = GTK_CELL_AREA_GET_CLASS (area);
if (class->add)
class->add (area, renderer);
else
g_warning ("GtkCellAreaClass::add not implemented for `%s'",
g_type_name (G_TYPE_FROM_INSTANCE (area)));
}
/**
* gtk_cell_area_remove:
* @area: a #GtkCellArea
* @renderer: the #GtkCellRenderer to add to @area
*
* Removes @renderer from @area.
*
* Since: 3.0
*/
void
gtk_cell_area_remove (GtkCellArea *area,
GtkCellRenderer *renderer)
{
GtkCellAreaClass *class;
GtkCellAreaPrivate *priv;
GList *renderers, *l;
g_return_if_fail (GTK_IS_CELL_AREA (area));
g_return_if_fail (GTK_IS_CELL_RENDERER (renderer));
class = GTK_CELL_AREA_GET_CLASS (area);
priv = area->priv;
/* Remove any custom attributes and custom cell data func here first */
g_hash_table_remove (priv->cell_info, renderer);
/* Remove focus siblings of this renderer */
g_hash_table_remove (priv->focus_siblings, renderer);
/* Remove this renderer from any focus renderer's sibling list */
renderers = gtk_cell_layout_get_cells (GTK_CELL_LAYOUT (area));
for (l = renderers; l; l = l->next)
{
GtkCellRenderer *focus_renderer = l->data;
if (gtk_cell_area_is_focus_sibling (area, focus_renderer, renderer))
{
gtk_cell_area_remove_focus_sibling (area, focus_renderer, renderer);
break;
}
}
g_list_free (renderers);
if (class->remove)
class->remove (area, renderer);
else
g_warning ("GtkCellAreaClass::remove not implemented for `%s'",
g_type_name (G_TYPE_FROM_INSTANCE (area)));
}
static void
get_has_renderer (GtkCellRenderer *renderer,
HasRendererCheck *check)
{
if (renderer == check->renderer)
check->has_renderer = TRUE;
}
/**
* gtk_cell_area_has_renderer:
* @area: a #GtkCellArea
* @renderer: the #GtkCellRenderer to check
*
* Checks if @area contains @renderer.
*
* Return value: %TRUE if @renderer is in the @area.
*
* Since: 3.0
*/
gboolean
gtk_cell_area_has_renderer (GtkCellArea *area,
GtkCellRenderer *renderer)
{
HasRendererCheck check = { renderer, FALSE };
g_return_val_if_fail (GTK_IS_CELL_AREA (area), FALSE);
g_return_val_if_fail (GTK_IS_CELL_RENDERER (renderer), FALSE);
gtk_cell_area_forall (area, (GtkCellCallback)get_has_renderer, &check);
return check.has_renderer;
}
/**
* gtk_cell_area_forall:
* @area: a #GtkCellArea
* @callback: the #GtkCellCallback to call
* @callback_data: user provided data pointer
*
* Calls @callback for every #GtkCellRenderer in @area.
*
* Since: 3.0
*/
void
gtk_cell_area_forall (GtkCellArea *area,
GtkCellCallback callback,
gpointer callback_data)
{
GtkCellAreaClass *class;
g_return_if_fail (GTK_IS_CELL_AREA (area));
g_return_if_fail (callback != NULL);
class = GTK_CELL_AREA_GET_CLASS (area);
if (class->forall)
class->forall (area, callback, callback_data);
else
g_warning ("GtkCellAreaClass::forall not implemented for `%s'",
g_type_name (G_TYPE_FROM_INSTANCE (area)));
}
/**
* gtk_cell_area_get_cell_allocation:
* @area: a #GtkCellArea
* @context: the #GtkCellAreaContext used to hold sizes for @area.
* @widget: the #GtkWidget that @area is rendering on
* @renderer: the #GtkCellRenderer to get the allocation for
* @cell_area: the whole allocated area for @area in @widget
* for this row
* @allocation: (out): where to store the allocation for @renderer
*
* Derives the allocation of @renderer inside @area if @area
* were to be renderered in @cell_area.
*
* Since: 3.0
*/
void
gtk_cell_area_get_cell_allocation (GtkCellArea *area,
GtkCellAreaContext *context,
GtkWidget *widget,
GtkCellRenderer *renderer,
const GdkRectangle *cell_area,
GdkRectangle *allocation)
{
GtkCellAreaClass *class;
g_return_if_fail (GTK_IS_CELL_AREA (area));
g_return_if_fail (GTK_IS_CELL_AREA_CONTEXT (context));
g_return_if_fail (GTK_IS_WIDGET (widget));
g_return_if_fail (GTK_IS_CELL_RENDERER (renderer));
g_return_if_fail (cell_area != NULL);
g_return_if_fail (allocation != NULL);
class = GTK_CELL_AREA_GET_CLASS (area);
if (class->get_cell_allocation)
class->get_cell_allocation (area, context, widget, renderer, cell_area, allocation);
else
g_warning ("GtkCellAreaClass::get_cell_allocation not implemented for `%s'",
g_type_name (G_TYPE_FROM_INSTANCE (area)));
}
/**
* gtk_cell_area_event:
* @area: a #GtkCellArea
* @context: the #GtkCellAreaContext for this row of data.
* @widget: the #GtkWidget that @area is rendering to
* @event: the #GdkEvent to handle
* @cell_area: the @widget relative coordinates for @area
* @flags: the #GtkCellRendererState for @area in this row.
*
* Delegates event handling to a #GtkCellArea.
*
* Return value: %TRUE if the event was handled by @area.
*
* Since: 3.0
*/
gint
gtk_cell_area_event (GtkCellArea *area,
GtkCellAreaContext *context,
GtkWidget *widget,
GdkEvent *event,
const GdkRectangle *cell_area,
GtkCellRendererState flags)
{
GtkCellAreaClass *class;
g_return_val_if_fail (GTK_IS_CELL_AREA (area), 0);
g_return_val_if_fail (GTK_IS_CELL_AREA_CONTEXT (context), 0);
g_return_val_if_fail (GTK_IS_WIDGET (widget), 0);
g_return_val_if_fail (event != NULL, 0);
g_return_val_if_fail (cell_area != NULL, 0);
class = GTK_CELL_AREA_GET_CLASS (area);
if (class->event)
return class->event (area, context, widget, event, cell_area, flags);
g_warning ("GtkCellAreaClass::event not implemented for `%s'",
g_type_name (G_TYPE_FROM_INSTANCE (area)));
return 0;
}
/**
* gtk_cell_area_render:
* @area: a #GtkCellArea
* @context: the #GtkCellAreaContext for this row of data.
* @widget: the #GtkWidget that @area is rendering to
* @cr: the #cairo_t to render with
* @background_area: the @widget relative coordinates for @area's background
* @cell_area: the @widget relative coordinates for @area
* @flags: the #GtkCellRendererState for @area in this row.
* @paint_focus: whether @area should paint focus on focused cells for focused rows or not.
*
* Renders @area's cells according to @area's layout onto @widget at
* the given coordinates.
*
* Since: 3.0
*/
void
gtk_cell_area_render (GtkCellArea *area,
GtkCellAreaContext *context,
GtkWidget *widget,
cairo_t *cr,
const GdkRectangle *background_area,
const GdkRectangle *cell_area,
GtkCellRendererState flags,
gboolean paint_focus)
{
GtkCellAreaClass *class;
g_return_if_fail (GTK_IS_CELL_AREA (area));
g_return_if_fail (GTK_IS_CELL_AREA_CONTEXT (context));
g_return_if_fail (GTK_IS_WIDGET (widget));
g_return_if_fail (cr != NULL);
g_return_if_fail (background_area != NULL);
g_return_if_fail (cell_area != NULL);
class = GTK_CELL_AREA_GET_CLASS (area);
if (class->render)
class->render (area, context, widget, cr, background_area, cell_area, flags, paint_focus);
else
g_warning ("GtkCellAreaClass::render not implemented for `%s'",
g_type_name (G_TYPE_FROM_INSTANCE (area)));
}
/**
* gtk_cell_area_set_style_detail:
* @area: a #GtkCellArea
* @detail: the #GtkStyle detail string to set
*
* Sets the detail string used in any gtk_paint_*() functions
* used by @area.
*
* Since: 3.0
*/
void
gtk_cell_area_set_style_detail (GtkCellArea *area,
const gchar *detail)
{
GtkCellAreaPrivate *priv;
g_return_if_fail (GTK_IS_CELL_AREA (area));
priv = area->priv;
if (g_strcmp0 (priv->style_detail, detail) != 0)
{
g_free (priv->style_detail);
priv->style_detail = g_strdup (detail);
}
}
/**
* gtk_cell_area_get_style_detail:
* @area: a #GtkCellArea
*
* Gets the detail string used in any gtk_paint_*() functions
* used by @area.
*
* Return value: the detail string, the string belongs to the area and should not be freed.
*
* Since: 3.0
*/
G_CONST_RETURN gchar *
gtk_cell_area_get_style_detail (GtkCellArea *area)
{
GtkCellAreaPrivate *priv;
g_return_val_if_fail (GTK_IS_CELL_AREA (area), NULL);
priv = area->priv;
return priv->style_detail;
}
/*************************************************************
* API: Geometry *
*************************************************************/
/**
* gtk_cell_area_create_context:
* @area: a #GtkCellArea
*
* Creates a #GtkCellAreaContext to be used with @area for
* all purposes. #GtkCellAreaContext stores geometry information
* for rows for which it was operated on, it is important to use
* the same context for the same row of data at all times (i.e.
* one should render and handle events with the same #GtkCellAreaContext
* which was used to request the size of those rows of data).
*
* Return value: (transfer full): a newly created #GtkCellAreaContext which can be used with @area.
*
* Since: 3.0
*/
GtkCellAreaContext *
gtk_cell_area_create_context (GtkCellArea *area)
{
GtkCellAreaClass *class;
g_return_val_if_fail (GTK_IS_CELL_AREA (area), NULL);
class = GTK_CELL_AREA_GET_CLASS (area);
if (class->create_context)
return class->create_context (area);
g_warning ("GtkCellAreaClass::create_context not implemented for `%s'",
g_type_name (G_TYPE_FROM_INSTANCE (area)));
return NULL;
}
/**
* gtk_cell_area_get_request_mode:
* @area: a #GtkCellArea
*
* Gets whether the area prefers a height-for-width layout
* or a width-for-height layout.
*
* Return value: The #GtkSizeRequestMode preferred by @area.
*
* Since: 3.0
*/
GtkSizeRequestMode
gtk_cell_area_get_request_mode (GtkCellArea *area)
{
GtkCellAreaClass *class;
g_return_val_if_fail (GTK_IS_CELL_AREA (area),
GTK_SIZE_REQUEST_HEIGHT_FOR_WIDTH);
class = GTK_CELL_AREA_GET_CLASS (area);
if (class->get_request_mode)
return class->get_request_mode (area);
g_warning ("GtkCellAreaClass::get_request_mode not implemented for `%s'",
g_type_name (G_TYPE_FROM_INSTANCE (area)));
return GTK_SIZE_REQUEST_HEIGHT_FOR_WIDTH;
}
/**
* gtk_cell_area_get_preferred_width:
* @area: a #GtkCellArea
* @context: the #GtkCellAreaContext to perform this request with
* @widget: the #GtkWidget where @area will be rendering
* @minimum_width: (out) (allow-none): location to store the minimum width, or %NULL
* @natural_width: (out) (allow-none): location to store the natural width, or %NULL
*
* Retrieves a cell area's initial minimum and natural width.
*
* @area will store some geometrical information in @context along the way,
* when requesting sizes over an arbitrary number of rows, its not important
* to check the @minimum_width and @natural_width of this call but rather to
* consult gtk_cell_area_context_get_preferred_width() after a series of
* requests.
*
* Since: 3.0
*/
void
gtk_cell_area_get_preferred_width (GtkCellArea *area,
GtkCellAreaContext *context,
GtkWidget *widget,
gint *minimum_width,
gint *natural_width)
{
GtkCellAreaClass *class;
g_return_if_fail (GTK_IS_CELL_AREA (area));
g_return_if_fail (GTK_IS_WIDGET (widget));
class = GTK_CELL_AREA_GET_CLASS (area);
if (class->get_preferred_width)
class->get_preferred_width (area, context, widget, minimum_width, natural_width);
else
g_warning ("GtkCellAreaClass::get_preferred_width not implemented for `%s'",
g_type_name (G_TYPE_FROM_INSTANCE (area)));
}
/**
* gtk_cell_area_get_preferred_height_for_width:
* @area: a #GtkCellArea
* @context: the #GtkCellAreaContext which has already been requested for widths.
* @widget: the #GtkWidget where @area will be rendering
* @width: the width for which to check the height of this area
* @minimum_height: (out) (allow-none): location to store the minimum height, or %NULL
* @natural_height: (out) (allow-none): location to store the natural height, or %NULL
*
* Retrieves a cell area's minimum and natural height if it would be given
* the specified @width.
*
* @area stores some geometrical information in @context along the way
* while calling gtk_cell_area_get_preferred_width(), it's important to
* perform a series of gtk_cell_area_get_preferred_width() requests with
* @context first and then call gtk_cell_area_get_preferred_height_for_width()
* on each cell area individually to get the height for width of each
* fully requested row.
*
* If at some point, the width of a single row changes, it should be
* requested with gtk_cell_area_get_preferred_width() again and then
* the full width of the requested rows checked again with
* gtk_cell_area_context_get_preferred_width().
*
* Since: 3.0
*/
void
gtk_cell_area_get_preferred_height_for_width (GtkCellArea *area,
GtkCellAreaContext *context,
GtkWidget *widget,
gint width,
gint *minimum_height,
gint *natural_height)
{
GtkCellAreaClass *class;
g_return_if_fail (GTK_IS_CELL_AREA (area));
g_return_if_fail (GTK_IS_WIDGET (widget));
class = GTK_CELL_AREA_GET_CLASS (area);
class->get_preferred_height_for_width (area, context, widget, width, minimum_height, natural_height);
}
/**
* gtk_cell_area_get_preferred_height:
* @area: a #GtkCellArea
* @context: the #GtkCellAreaContext to perform this request with
* @widget: the #GtkWidget where @area will be rendering
* @minimum_height: (out) (allow-none): location to store the minimum height, or %NULL
* @natural_height: (out) (allow-none): location to store the natural height, or %NULL
*
* Retrieves a cell area's initial minimum and natural height.
*
* @area will store some geometrical information in @context along the way,
* when requesting sizes over an arbitrary number of rows, its not important
* to check the @minimum_height and @natural_height of this call but rather to
* consult gtk_cell_area_context_get_preferred_height() after a series of
* requests.
*
* Since: 3.0
*/
void
gtk_cell_area_get_preferred_height (GtkCellArea *area,
GtkCellAreaContext *context,
GtkWidget *widget,
gint *minimum_height,
gint *natural_height)
{
GtkCellAreaClass *class;
g_return_if_fail (GTK_IS_CELL_AREA (area));
g_return_if_fail (GTK_IS_WIDGET (widget));
class = GTK_CELL_AREA_GET_CLASS (area);
if (class->get_preferred_height)
class->get_preferred_height (area, context, widget, minimum_height, natural_height);
else
g_warning ("GtkCellAreaClass::get_preferred_height not implemented for `%s'",
g_type_name (G_TYPE_FROM_INSTANCE (area)));
}
/**
* gtk_cell_area_get_preferred_width_for_height:
* @area: a #GtkCellArea
* @context: the #GtkCellAreaContext which has already been requested for widths.
* @widget: the #GtkWidget where @area will be rendering
* @height: the height for which to check the width of this area
* @minimum_width: (out) (allow-none): location to store the minimum width, or %NULL
* @natural_width: (out) (allow-none): location to store the natural width, or %NULL
*
* Retrieves a cell area's minimum and natural width if it would be given
* the specified @height.
*
* @area stores some geometrical information in @context along the way
* while calling gtk_cell_area_get_preferred_height(), it's important to
* perform a series of gtk_cell_area_get_preferred_height() requests with
* @context first and then call gtk_cell_area_get_preferred_width_for_height()
* on each cell area individually to get the height for width of each
* fully requested row.
*
* If at some point, the height of a single row changes, it should be
* requested with gtk_cell_area_get_preferred_height() again and then
* the full height of the requested rows checked again with
* gtk_cell_area_context_get_preferred_height().
*
* Since: 3.0
*/
void
gtk_cell_area_get_preferred_width_for_height (GtkCellArea *area,
GtkCellAreaContext *context,
GtkWidget *widget,
gint height,
gint *minimum_width,
gint *natural_width)
{
GtkCellAreaClass *class;
g_return_if_fail (GTK_IS_CELL_AREA (area));
g_return_if_fail (GTK_IS_WIDGET (widget));
class = GTK_CELL_AREA_GET_CLASS (area);
class->get_preferred_width_for_height (area, context, widget, height, minimum_width, natural_width);
}
/*************************************************************
* API: Attributes *
*************************************************************/
/**
* gtk_cell_area_attribute_connect:
* @area: a #GtkCellArea
* @renderer: the #GtkCellRenderer to connect an attribute for
* @attribute: the attribute name
* @column: the #GtkTreeModel column to fetch attribute values from
*
* Connects an @attribute to apply values from @column for the
* #GtkTreeModel in use.
*
* Since: 3.0
*/
void
gtk_cell_area_attribute_connect (GtkCellArea *area,
GtkCellRenderer *renderer,
const gchar *attribute,
gint column)
{
GtkCellAreaPrivate *priv;
CellInfo *info;
CellAttribute *cell_attribute;
g_return_if_fail (GTK_IS_CELL_AREA (area));
g_return_if_fail (GTK_IS_CELL_RENDERER (renderer));
g_return_if_fail (attribute != NULL);
g_return_if_fail (gtk_cell_area_has_renderer (area, renderer));
priv = area->priv;
info = g_hash_table_lookup (priv->cell_info, renderer);
if (!info)
{
info = cell_info_new (NULL, NULL, NULL);
g_hash_table_insert (priv->cell_info, renderer, info);
}
else
{
GSList *node;
/* Check we are not adding the same attribute twice */
if ((node = g_slist_find_custom (info->attributes, attribute,
(GCompareFunc)cell_attribute_find)) != NULL)
{
cell_attribute = node->data;
g_warning ("Cannot connect attribute `%s' for cell renderer class `%s' "
"since `%s' is already attributed to column %d",
attribute,
g_type_name (G_TYPE_FROM_INSTANCE (area)),
attribute, cell_attribute->column);
return;
}
}
cell_attribute = cell_attribute_new (renderer, attribute, column);
if (!cell_attribute)
{
g_warning ("Cannot connect attribute `%s' for cell renderer class `%s' "
"since attribute does not exist",
attribute,
g_type_name (G_TYPE_FROM_INSTANCE (area)));
return;
}
info->attributes = g_slist_prepend (info->attributes, cell_attribute);
}
/**
* gtk_cell_area_attribute_disconnect:
* @area: a #GtkCellArea
* @renderer: the #GtkCellRenderer to disconnect an attribute for
* @attribute: the attribute name
*
* Disconnects @attribute for the @renderer in @area so that
* attribute will no longer be updated with values from the
* model.
*
* Since: 3.0
*/
void
gtk_cell_area_attribute_disconnect (GtkCellArea *area,
GtkCellRenderer *renderer,
const gchar *attribute)
{
GtkCellAreaPrivate *priv;
CellInfo *info;
CellAttribute *cell_attribute;
GSList *node;
g_return_if_fail (GTK_IS_CELL_AREA (area));
g_return_if_fail (GTK_IS_CELL_RENDERER (renderer));
g_return_if_fail (attribute != NULL);
g_return_if_fail (gtk_cell_area_has_renderer (area, renderer));
priv = area->priv;
info = g_hash_table_lookup (priv->cell_info, renderer);
if (info)
{
node = g_slist_find_custom (info->attributes, attribute,
(GCompareFunc)cell_attribute_find);
if (node)
{
cell_attribute = node->data;
cell_attribute_free (cell_attribute);
info->attributes = g_slist_delete_link (info->attributes, node);
}
}
}
/**
* gtk_cell_area_apply_attributes
* @area: a #GtkCellArea
* @tree_model: the #GtkTreeModel to pull values from
* @iter: the #GtkTreeIter in @tree_model to apply values for
* @is_expander: whether @iter has children
* @is_expanded: whether @iter is expanded in the view and
* children are visible
*
* Applies any connected attributes to the renderers in
* @area by pulling the values from @tree_model.
*
* Since: 3.0
*/
void
gtk_cell_area_apply_attributes (GtkCellArea *area,
GtkTreeModel *tree_model,
GtkTreeIter *iter,
gboolean is_expander,
gboolean is_expanded)
{
g_return_if_fail (GTK_IS_CELL_AREA (area));
g_return_if_fail (GTK_IS_TREE_MODEL (tree_model));
g_return_if_fail (iter != NULL);
g_signal_emit (area, cell_area_signals[SIGNAL_APPLY_ATTRIBUTES], 0,
tree_model, iter, is_expander, is_expanded);
}
/**
* gtk_cell_area_get_current_path_string:
* @area: a #GtkCellArea
*
* Gets the current #GtkTreePath string for the currently
* applied #GtkTreeIter, this is implicitly updated when
* gtk_cell_area_apply_attributes() is called and can be
* used to interact with renderers from #GtkCellArea
* subclasses.
*
* Return value: The current #GtkTreePath string for the current
* attributes applied to @area. This string belongs to the area and
* should not be freed.
*
* Since: 3.0
*/
G_CONST_RETURN gchar *
gtk_cell_area_get_current_path_string (GtkCellArea *area)
{
GtkCellAreaPrivate *priv;
g_return_val_if_fail (GTK_IS_CELL_AREA (area), NULL);
priv = area->priv;
return priv->current_path;
}
/*************************************************************
* API: Cell Properties *
*************************************************************/
/**
* gtk_cell_area_class_install_cell_property:
* @aclass: a #GtkCellAreaClass
* @property_id: the id for the property
* @pspec: the #GParamSpec for the property
*
* Installs a cell property on a cell area class.
*
* Since: 3.0
*/
void
gtk_cell_area_class_install_cell_property (GtkCellAreaClass *aclass,
guint property_id,
GParamSpec *pspec)
{
g_return_if_fail (GTK_IS_CELL_AREA_CLASS (aclass));
g_return_if_fail (G_IS_PARAM_SPEC (pspec));
if (pspec->flags & G_PARAM_WRITABLE)
g_return_if_fail (aclass->set_cell_property != NULL);
if (pspec->flags & G_PARAM_READABLE)
g_return_if_fail (aclass->get_cell_property != NULL);
g_return_if_fail (property_id > 0);
g_return_if_fail (PARAM_SPEC_PARAM_ID (pspec) == 0); /* paranoid */
g_return_if_fail ((pspec->flags & (G_PARAM_CONSTRUCT | G_PARAM_CONSTRUCT_ONLY)) == 0);
if (g_param_spec_pool_lookup (cell_property_pool, pspec->name, G_OBJECT_CLASS_TYPE (aclass), TRUE))
{
g_warning (G_STRLOC ": class `%s' already contains a cell property named `%s'",
G_OBJECT_CLASS_NAME (aclass), pspec->name);
return;
}
g_param_spec_ref (pspec);
g_param_spec_sink (pspec);
PARAM_SPEC_SET_PARAM_ID (pspec, property_id);
g_param_spec_pool_insert (cell_property_pool, pspec, G_OBJECT_CLASS_TYPE (aclass));
}
/**
* gtk_cell_area_class_find_cell_property:
* @aclass: a #GtkCellAreaClass
* @property_name: the name of the child property to find
*
* Finds a cell property of a cell area class by name.
*
* Return value: (allow-none): the #GParamSpec of the child property or %NULL if @aclass has no
* child property with that name.
*
* Since: 3.0
*/
GParamSpec*
gtk_cell_area_class_find_cell_property (GtkCellAreaClass *aclass,
const gchar *property_name)
{
g_return_val_if_fail (GTK_IS_CELL_AREA_CLASS (aclass), NULL);
g_return_val_if_fail (property_name != NULL, NULL);
return g_param_spec_pool_lookup (cell_property_pool,
property_name,
G_OBJECT_CLASS_TYPE (aclass),
TRUE);
}
/**
* gtk_cell_area_class_list_cell_properties:
* @aclass: a #GtkCellAreaClass
* @n_properties: location to return the number of cell properties found
*
* Returns all cell properties of a cell area class.
*
* Return value: a newly allocated %NULL-terminated array of #GParamSpec*.
* The array must be freed with g_free().
*
* Since: 3.0
*/
GParamSpec**
gtk_cell_area_class_list_cell_properties (GtkCellAreaClass *aclass,
guint *n_properties)
{
GParamSpec **pspecs;
guint n;
g_return_val_if_fail (GTK_IS_CELL_AREA_CLASS (aclass), NULL);
pspecs = g_param_spec_pool_list (cell_property_pool,
G_OBJECT_CLASS_TYPE (aclass),
&n);
if (n_properties)
*n_properties = n;
return pspecs;
}
/**
* gtk_cell_area_add_with_properties:
* @area: a #GtkCellArea
* @renderer: a #GtkCellRenderer to be placed inside @area
* @first_prop_name: the name of the first cell property to set
* @Varargs: a %NULL-terminated list of property names and values, starting
* with @first_prop_name
*
* Adds @renderer to @area, setting cell properties at the same time.
* See gtk_cell_area_add() and gtk_cell_area_child_set() for more details.
*
* Since: 3.0
*/
void
gtk_cell_area_add_with_properties (GtkCellArea *area,
GtkCellRenderer *renderer,
const gchar *first_prop_name,
...)
{
GtkCellAreaClass *class;
g_return_if_fail (GTK_IS_CELL_AREA (area));
g_return_if_fail (GTK_IS_CELL_RENDERER (renderer));
class = GTK_CELL_AREA_GET_CLASS (area);
if (class->add)
{
va_list var_args;
class->add (area, renderer);
va_start (var_args, first_prop_name);
gtk_cell_area_cell_set_valist (area, renderer, first_prop_name, var_args);
va_end (var_args);
}
else
g_warning ("GtkCellAreaClass::add not implemented for `%s'",
g_type_name (G_TYPE_FROM_INSTANCE (area)));
}
/**
* gtk_cell_area_cell_set:
* @area: a #GtkCellArea
* @renderer: a #GtkCellRenderer which is a cell inside @area
* @first_prop_name: the name of the first cell property to set
* @Varargs: a %NULL-terminated list of property names and values, starting
* with @first_prop_name
*
* Sets one or more cell properties for @cell in @area.
*
* Since: 3.0
*/
void
gtk_cell_area_cell_set (GtkCellArea *area,
GtkCellRenderer *renderer,
const gchar *first_prop_name,
...)
{
va_list var_args;
g_return_if_fail (GTK_IS_CELL_AREA (area));
g_return_if_fail (GTK_IS_CELL_RENDERER (renderer));
va_start (var_args, first_prop_name);
gtk_cell_area_cell_set_valist (area, renderer, first_prop_name, var_args);
va_end (var_args);
}
/**
* gtk_cell_area_cell_get:
* @area: a #GtkCellArea
* @renderer: a #GtkCellRenderer which is inside @area
* @first_prop_name: the name of the first cell property to get
* @Varargs: return location for the first cell property, followed
* optionally by more name/return location pairs, followed by %NULL
*
* Gets the values of one or more cell properties for @renderer in @area.
*
* Since: 3.0
*/
void
gtk_cell_area_cell_get (GtkCellArea *area,
GtkCellRenderer *renderer,
const gchar *first_prop_name,
...)
{
va_list var_args;
g_return_if_fail (GTK_IS_CELL_AREA (area));
g_return_if_fail (GTK_IS_CELL_RENDERER (renderer));
va_start (var_args, first_prop_name);
gtk_cell_area_cell_get_valist (area, renderer, first_prop_name, var_args);
va_end (var_args);
}
static inline void
area_get_cell_property (GtkCellArea *area,
GtkCellRenderer *renderer,
GParamSpec *pspec,
GValue *value)
{
GtkCellAreaClass *class = g_type_class_peek (pspec->owner_type);
class->get_cell_property (area, renderer, PARAM_SPEC_PARAM_ID (pspec), value, pspec);
}
static inline void
area_set_cell_property (GtkCellArea *area,
GtkCellRenderer *renderer,
GParamSpec *pspec,
const GValue *value)
{
GValue tmp_value = { 0, };
GtkCellAreaClass *class = g_type_class_peek (pspec->owner_type);
/* provide a copy to work from, convert (if necessary) and validate */
g_value_init (&tmp_value, G_PARAM_SPEC_VALUE_TYPE (pspec));
if (!g_value_transform (value, &tmp_value))
g_warning ("unable to set cell property `%s' of type `%s' from value of type `%s'",
pspec->name,
g_type_name (G_PARAM_SPEC_VALUE_TYPE (pspec)),
G_VALUE_TYPE_NAME (value));
else if (g_param_value_validate (pspec, &tmp_value) && !(pspec->flags & G_PARAM_LAX_VALIDATION))
{
gchar *contents = g_strdup_value_contents (value);
g_warning ("value \"%s\" of type `%s' is invalid for property `%s' of type `%s'",
contents,
G_VALUE_TYPE_NAME (value),
pspec->name,
g_type_name (G_PARAM_SPEC_VALUE_TYPE (pspec)));
g_free (contents);
}
else
{
class->set_cell_property (area, renderer, PARAM_SPEC_PARAM_ID (pspec), &tmp_value, pspec);
}
g_value_unset (&tmp_value);
}
/**
* gtk_cell_area_cell_set_valist:
* @area: a #GtkCellArea
* @renderer: a #GtkCellRenderer which inside @area
* @first_property_name: the name of the first cell property to set
* @var_args: a %NULL-terminated list of property names and values, starting
* with @first_prop_name
*
* Sets one or more cell properties for @renderer in @area.
*
* Since: 3.0
*/
void
gtk_cell_area_cell_set_valist (GtkCellArea *area,
GtkCellRenderer *renderer,
const gchar *first_property_name,
va_list var_args)
{
const gchar *name;
g_return_if_fail (GTK_IS_CELL_AREA (area));
g_return_if_fail (GTK_IS_CELL_RENDERER (renderer));
name = first_property_name;
while (name)
{
GValue value = { 0, };
gchar *error = NULL;
GParamSpec *pspec =
g_param_spec_pool_lookup (cell_property_pool, name,
G_OBJECT_TYPE (area), TRUE);
if (!pspec)
{
g_warning ("%s: cell area class `%s' has no cell property named `%s'",
G_STRLOC, G_OBJECT_TYPE_NAME (area), name);
break;
}
if (!(pspec->flags & G_PARAM_WRITABLE))
{
g_warning ("%s: cell property `%s' of cell area class `%s' is not writable",
G_STRLOC, pspec->name, G_OBJECT_TYPE_NAME (area));
break;
}
g_value_init (&value, G_PARAM_SPEC_VALUE_TYPE (pspec));
G_VALUE_COLLECT (&value, var_args, 0, &error);
if (error)
{
g_warning ("%s: %s", G_STRLOC, error);
g_free (error);
/* we purposely leak the value here, it might not be
* in a sane state if an error condition occoured
*/
break;
}
area_set_cell_property (area, renderer, pspec, &value);
g_value_unset (&value);
name = va_arg (var_args, gchar*);
}
}
/**
* gtk_cell_area_cell_get_valist:
* @area: a #GtkCellArea
* @renderer: a #GtkCellRenderer inside @area
* @first_property_name: the name of the first property to get
* @var_args: return location for the first property, followed
* optionally by more name/return location pairs, followed by %NULL
*
* Gets the values of one or more cell properties for @renderer in @area.
*
* Since: 3.0
*/
void
gtk_cell_area_cell_get_valist (GtkCellArea *area,
GtkCellRenderer *renderer,
const gchar *first_property_name,
va_list var_args)
{
const gchar *name;
g_return_if_fail (GTK_IS_CELL_AREA (area));
g_return_if_fail (GTK_IS_CELL_RENDERER (renderer));
name = first_property_name;
while (name)
{
GValue value = { 0, };
GParamSpec *pspec;
gchar *error;
pspec = g_param_spec_pool_lookup (cell_property_pool, name,
G_OBJECT_TYPE (area), TRUE);
if (!pspec)
{
g_warning ("%s: cell area class `%s' has no cell property named `%s'",
G_STRLOC, G_OBJECT_TYPE_NAME (area), name);
break;
}
if (!(pspec->flags & G_PARAM_READABLE))
{
g_warning ("%s: cell property `%s' of cell area class `%s' is not readable",
G_STRLOC, pspec->name, G_OBJECT_TYPE_NAME (area));
break;
}
g_value_init (&value, G_PARAM_SPEC_VALUE_TYPE (pspec));
area_get_cell_property (area, renderer, pspec, &value);
G_VALUE_LCOPY (&value, var_args, 0, &error);
if (error)
{
g_warning ("%s: %s", G_STRLOC, error);
g_free (error);
g_value_unset (&value);
break;
}
g_value_unset (&value);
name = va_arg (var_args, gchar*);
}
}
/**
* gtk_cell_area_cell_set_property:
* @area: a #GtkCellArea
* @renderer: a #GtkCellRenderer inside @area
* @property_name: the name of the cell property to set
* @value: the value to set the cell property to
*
* Sets a cell property for @renderer in @area.
*
* Since: 3.0
*/
void
gtk_cell_area_cell_set_property (GtkCellArea *area,
GtkCellRenderer *renderer,
const gchar *property_name,
const GValue *value)
{
GParamSpec *pspec;
g_return_if_fail (GTK_IS_CELL_AREA (area));
g_return_if_fail (GTK_IS_CELL_RENDERER (renderer));
g_return_if_fail (property_name != NULL);
g_return_if_fail (G_IS_VALUE (value));
pspec = g_param_spec_pool_lookup (cell_property_pool, property_name,
G_OBJECT_TYPE (area), TRUE);
if (!pspec)
g_warning ("%s: cell area class `%s' has no cell property named `%s'",
G_STRLOC, G_OBJECT_TYPE_NAME (area), property_name);
else if (!(pspec->flags & G_PARAM_WRITABLE))
g_warning ("%s: cell property `%s' of cell area class `%s' is not writable",
G_STRLOC, pspec->name, G_OBJECT_TYPE_NAME (area));
else
{
area_set_cell_property (area, renderer, pspec, value);
}
}
/**
* gtk_cell_area_cell_get_property:
* @area: a #GtkCellArea
* @renderer: a #GtkCellRenderer inside @area
* @property_name: the name of the property to get
* @value: a location to return the value
*
* Gets the value of a cell property for @renderer in @area.
*
* Since: 3.0
*/
void
gtk_cell_area_cell_get_property (GtkCellArea *area,
GtkCellRenderer *renderer,
const gchar *property_name,
GValue *value)
{
GParamSpec *pspec;
g_return_if_fail (GTK_IS_CELL_AREA (area));
g_return_if_fail (GTK_IS_CELL_RENDERER (renderer));
g_return_if_fail (property_name != NULL);
g_return_if_fail (G_IS_VALUE (value));
pspec = g_param_spec_pool_lookup (cell_property_pool, property_name,
G_OBJECT_TYPE (area), TRUE);
if (!pspec)
g_warning ("%s: cell area class `%s' has no cell property named `%s'",
G_STRLOC, G_OBJECT_TYPE_NAME (area), property_name);
else if (!(pspec->flags & G_PARAM_READABLE))
g_warning ("%s: cell property `%s' of cell area class `%s' is not readable",
G_STRLOC, pspec->name, G_OBJECT_TYPE_NAME (area));
else
{
GValue *prop_value, tmp_value = { 0, };
/* auto-conversion of the callers value type
*/
if (G_VALUE_TYPE (value) == G_PARAM_SPEC_VALUE_TYPE (pspec))
{
g_value_reset (value);
prop_value = value;
}
else if (!g_value_type_transformable (G_PARAM_SPEC_VALUE_TYPE (pspec), G_VALUE_TYPE (value)))
{
g_warning ("can't retrieve cell property `%s' of type `%s' as value of type `%s'",
pspec->name,
g_type_name (G_PARAM_SPEC_VALUE_TYPE (pspec)),
G_VALUE_TYPE_NAME (value));
return;
}
else
{
g_value_init (&tmp_value, G_PARAM_SPEC_VALUE_TYPE (pspec));
prop_value = &tmp_value;
}
area_get_cell_property (area, renderer, pspec, prop_value);
if (prop_value != value)
{
g_value_transform (prop_value, value);
g_value_unset (&tmp_value);
}
}
}
/*************************************************************
* API: Focus *
*************************************************************/
/**
* gtk_cell_area_is_activatable:
* @area: a #GtkCellArea
*
* Returns whether the area can do anything when activated,
* after applying new attributes to @area.
*
* Return value: whether @area can do anything when activated.
*
* Since: 3.0
*/
gboolean
gtk_cell_area_is_activatable (GtkCellArea *area)
{
g_return_val_if_fail (GTK_IS_CELL_AREA (area), FALSE);
return GTK_CELL_AREA_GET_CLASS (area)->is_activatable (area);
}
/**
* gtk_cell_area_focus:
* @area: a #GtkCellArea
* @direction: the #GtkDirectionType
*
* This should be called by the @area's owning layout widget
* when focus is to be passed to @area, or moved within @area
* for a given @direction and row data.
*
* Implementing #GtkCellArea classes should implement this
* method to receive and navigate focus in it's own way particular
* to how it lays out cells.
*
* Return value: %TRUE if focus remains inside @area as a result of this call.
*
* Since: 3.0
*/
gboolean
gtk_cell_area_focus (GtkCellArea *area,
GtkDirectionType direction)
{
GtkCellAreaClass *class;
g_return_val_if_fail (GTK_IS_CELL_AREA (area), FALSE);
class = GTK_CELL_AREA_GET_CLASS (area);
if (class->focus)
return class->focus (area, direction);
g_warning ("GtkCellAreaClass::focus not implemented for `%s'",
g_type_name (G_TYPE_FROM_INSTANCE (area)));
return FALSE;
}
/**
* gtk_cell_area_activate:
* @area: a #GtkCellArea
* @context: the #GtkCellAreaContext in context with the current row data
* @widget: the #GtkWidget that @area is rendering on
* @cell_area: the size and location of @area relative to @widget's allocation
* @flags: the #GtkCellRendererState flags for @area for this row of data.
*
* Activates @area, usually by activating the currently focused
* cell, however some subclasses which embed widgets in the area
* can also activate a widget if it currently has the focus.
*
* Return value: Whether @area was successfully activated.
*
* Since: 3.0
*/
gboolean
gtk_cell_area_activate (GtkCellArea *area,
GtkCellAreaContext *context,
GtkWidget *widget,
const GdkRectangle *cell_area,
GtkCellRendererState flags)
{
g_return_val_if_fail (GTK_IS_CELL_AREA (area), FALSE);
return GTK_CELL_AREA_GET_CLASS (area)->activate (area, context, widget, cell_area, flags);
}
/**
* gtk_cell_area_set_focus_cell:
* @area: a #GtkCellArea
* @focus_cell: the #GtkCellRenderer to give focus to
*
* This is generally called from #GtkCellArea implementations
* either gtk_cell_area_grab_focus() or gtk_cell_area_update_focus()
* is called. It's also up to the #GtkCellArea implementation
* to update the focused cell when receiving events from
* gtk_cell_area_event() appropriately.
*
* Since: 3.0
*/
void
gtk_cell_area_set_focus_cell (GtkCellArea *area,
GtkCellRenderer *renderer)
{
GtkCellAreaPrivate *priv;
g_return_if_fail (GTK_IS_CELL_AREA (area));
g_return_if_fail (renderer == NULL || GTK_IS_CELL_RENDERER (renderer));
priv = area->priv;
if (priv->focus_cell != renderer)
{
if (priv->focus_cell)
g_object_unref (priv->focus_cell);
priv->focus_cell = renderer;
if (priv->focus_cell)
g_object_ref (priv->focus_cell);
g_object_notify (G_OBJECT (area), "focus-cell");
}
/* Signal that the current focus renderer for this path changed
* (it may be that the focus cell did not change, but the row
* may have changed so we need to signal it) */
g_signal_emit (area, cell_area_signals[SIGNAL_FOCUS_CHANGED], 0,
priv->focus_cell, priv->current_path);
}
/**
* gtk_cell_area_get_focus_cell:
* @area: a #GtkCellArea
*
* Retrieves the currently focused cell for @area
*
* Return value: the currently focused cell in @area.
*
* Since: 3.0
*/
GtkCellRenderer *
gtk_cell_area_get_focus_cell (GtkCellArea *area)
{
GtkCellAreaPrivate *priv;
g_return_val_if_fail (GTK_IS_CELL_AREA (area), NULL);
priv = area->priv;
return priv->focus_cell;
}
/*************************************************************
* API: Focus Siblings *
*************************************************************/
/**
* gtk_cell_area_add_focus_sibling:
* @area: a #GtkCellArea
* @renderer: the #GtkCellRenderer expected to have focus
* @sibling: the #GtkCellRenderer to add to @renderer's focus area
*
* Adds @sibling to @renderer's focusable area, focus will be drawn
* around @renderer and all of it's siblings if @renderer can
* focus for a given row.
*
* Events handled by focus siblings can also activate the given
* focusable @renderer.
*
* Since: 3.0
*/
void
gtk_cell_area_add_focus_sibling (GtkCellArea *area,
GtkCellRenderer *renderer,
GtkCellRenderer *sibling)
{
GtkCellAreaPrivate *priv;
GList *siblings;
g_return_if_fail (GTK_IS_CELL_AREA (area));
g_return_if_fail (GTK_IS_CELL_RENDERER (renderer));
g_return_if_fail (GTK_IS_CELL_RENDERER (sibling));
g_return_if_fail (renderer != sibling);
g_return_if_fail (gtk_cell_area_has_renderer (area, renderer));
g_return_if_fail (gtk_cell_area_has_renderer (area, sibling));
g_return_if_fail (!gtk_cell_area_is_focus_sibling (area, renderer, sibling));
/* XXX We should also check that sibling is not in any other renderer's sibling
* list already, a renderer can be sibling of only one focusable renderer
* at a time.
*/
priv = area->priv;
siblings = g_hash_table_lookup (priv->focus_siblings, renderer);
if (siblings)
siblings = g_list_append (siblings, sibling);
else
{
siblings = g_list_append (siblings, sibling);
g_hash_table_insert (priv->focus_siblings, renderer, siblings);
}
}
/**
* gtk_cell_area_remove_focus_sibling:
* @area: a #GtkCellArea
* @renderer: the #GtkCellRenderer expected to have focus
* @sibling: the #GtkCellRenderer to remove from @renderer's focus area
*
* Removes @sibling from @renderer's focus sibling list
* (see gtk_cell_area_add_focus_sibling()).
*
* Since: 3.0
*/
void
gtk_cell_area_remove_focus_sibling (GtkCellArea *area,
GtkCellRenderer *renderer,
GtkCellRenderer *sibling)
{
GtkCellAreaPrivate *priv;
GList *siblings;
g_return_if_fail (GTK_IS_CELL_AREA (area));
g_return_if_fail (GTK_IS_CELL_RENDERER (renderer));
g_return_if_fail (GTK_IS_CELL_RENDERER (sibling));
g_return_if_fail (gtk_cell_area_is_focus_sibling (area, renderer, sibling));
priv = area->priv;
siblings = g_hash_table_lookup (priv->focus_siblings, renderer);
siblings = g_list_copy (siblings);
siblings = g_list_remove (siblings, sibling);
if (!siblings)
g_hash_table_remove (priv->focus_siblings, renderer);
else
g_hash_table_insert (priv->focus_siblings, renderer, siblings);
}
/**
* gtk_cell_area_is_focus_sibling:
* @area: a #GtkCellArea
* @renderer: the #GtkCellRenderer expected to have focus
* @sibling: the #GtkCellRenderer to check against @renderer's sibling list
*
* Returns %TRUE if @sibling is one of @renderer's focus siblings
* (see gtk_cell_area_add_focus_sibling()).
*
* Since: 3.0
*/
gboolean
gtk_cell_area_is_focus_sibling (GtkCellArea *area,
GtkCellRenderer *renderer,
GtkCellRenderer *sibling)
{
GtkCellAreaPrivate *priv;
GList *siblings, *l;
g_return_val_if_fail (GTK_IS_CELL_AREA (area), FALSE);
g_return_val_if_fail (GTK_IS_CELL_RENDERER (renderer), FALSE);
g_return_val_if_fail (GTK_IS_CELL_RENDERER (sibling), FALSE);
priv = area->priv;
siblings = g_hash_table_lookup (priv->focus_siblings, renderer);
for (l = siblings; l; l = l->next)
{
GtkCellRenderer *a_sibling = l->data;
if (a_sibling == sibling)
return TRUE;
}
return FALSE;
}
/**
* gtk_cell_area_get_focus_siblings:
* @area: a #GtkCellArea
* @renderer: the #GtkCellRenderer expected to have focus
*
* Gets the focus sibling cell renderers for @renderer.
*
* Return value: (element-type GtkCellRenderer) (transfer none): A #GList of #GtkCellRenderers.
* The returned list is internal and should not be freed.
*
* Since: 3.0
*/
const GList *
gtk_cell_area_get_focus_siblings (GtkCellArea *area,
GtkCellRenderer *renderer)
{
GtkCellAreaPrivate *priv;
g_return_val_if_fail (GTK_IS_CELL_AREA (area), NULL);
g_return_val_if_fail (GTK_IS_CELL_RENDERER (renderer), NULL);
priv = area->priv;
return g_hash_table_lookup (priv->focus_siblings, renderer);
}
/**
* gtk_cell_area_get_focus_from_sibling:
* @area: a #GtkCellArea
* @renderer: the #GtkCellRenderer
*
* Gets the #GtkCellRenderer which is expected to be focusable
* for which @renderer is, or may be a sibling.
*
* This is handy for #GtkCellArea subclasses when handling events,
* after determining the renderer at the event location it can
* then chose to activate the focus cell for which the event
* cell may have been a sibling.
*
* Return value: the #GtkCellRenderer for which @renderer is a sibling, or %NULL.
*
* Since: 3.0
*/
GtkCellRenderer *
gtk_cell_area_get_focus_from_sibling (GtkCellArea *area,
GtkCellRenderer *renderer)
{
GtkCellRenderer *ret_renderer = NULL;
GList *renderers, *l;
g_return_val_if_fail (GTK_IS_CELL_AREA (area), NULL);
g_return_val_if_fail (GTK_IS_CELL_RENDERER (renderer), NULL);
renderers = gtk_cell_layout_get_cells (GTK_CELL_LAYOUT (area));
for (l = renderers; l; l = l->next)
{
GtkCellRenderer *a_renderer = l->data;
const GList *list;
for (list = gtk_cell_area_get_focus_siblings (area, a_renderer);
list; list = list->next)
{
GtkCellRenderer *sibling_renderer = list->data;
if (sibling_renderer == renderer)
{
ret_renderer = a_renderer;
break;
}
}
}
g_list_free (renderers);
return ret_renderer;
}
/*************************************************************
* API: Cell Activation/Editing *
*************************************************************/
static void
gtk_cell_area_add_editable (GtkCellArea *area,
GtkCellRenderer *renderer,
GtkCellEditable *editable,
GdkRectangle *cell_area)
{
g_signal_emit (area, cell_area_signals[SIGNAL_ADD_EDITABLE], 0,
renderer, editable, cell_area, area->priv->current_path);
}
static void
gtk_cell_area_remove_editable (GtkCellArea *area,
GtkCellRenderer *renderer,
GtkCellEditable *editable)
{
g_signal_emit (area, cell_area_signals[SIGNAL_REMOVE_EDITABLE], 0, renderer, editable);
}
static void
cell_area_remove_widget_cb (GtkCellEditable *editable,
GtkCellArea *area)
{
GtkCellAreaPrivate *priv = area->priv;
g_assert (priv->edit_widget == editable);
g_assert (priv->edited_cell != NULL);
gtk_cell_area_remove_editable (area, priv->edited_cell, priv->edit_widget);
/* Now that we're done with editing the widget and it can be removed,
* remove our references to the widget and disconnect handlers */
gtk_cell_area_set_edited_cell (area, NULL);
gtk_cell_area_set_edit_widget (area, NULL);
}
static void
gtk_cell_area_set_edited_cell (GtkCellArea *area,
GtkCellRenderer *renderer)
{
GtkCellAreaPrivate *priv;
g_return_if_fail (GTK_IS_CELL_AREA (area));
g_return_if_fail (renderer == NULL || GTK_IS_CELL_RENDERER (renderer));
priv = area->priv;
if (priv->edited_cell != renderer)
{
if (priv->edited_cell)
g_object_unref (priv->edited_cell);
priv->edited_cell = renderer;
if (priv->edited_cell)
g_object_ref (priv->edited_cell);
g_object_notify (G_OBJECT (area), "edited-cell");
}
}
static void
gtk_cell_area_set_edit_widget (GtkCellArea *area,
GtkCellEditable *editable)
{
GtkCellAreaPrivate *priv;
g_return_if_fail (GTK_IS_CELL_AREA (area));
g_return_if_fail (editable == NULL || GTK_IS_CELL_EDITABLE (editable));
priv = area->priv;
if (priv->edit_widget != editable)
{
if (priv->edit_widget)
{
g_signal_handler_disconnect (priv->edit_widget, priv->remove_widget_id);
g_object_unref (priv->edit_widget);
}
priv->edit_widget = editable;
if (priv->edit_widget)
{
priv->remove_widget_id =
g_signal_connect (priv->edit_widget, "remove-widget",
G_CALLBACK (cell_area_remove_widget_cb), area);
g_object_ref (priv->edit_widget);
}
g_object_notify (G_OBJECT (area), "edit-widget");
}
}
/**
* gtk_cell_area_get_edited_cell:
* @area: a #GtkCellArea
*
* Gets the #GtkCellRenderer in @area that is currently
* being edited.
*
* Return value: The currently edited #GtkCellRenderer
*
* Since: 3.0
*/
GtkCellRenderer *
gtk_cell_area_get_edited_cell (GtkCellArea *area)
{
GtkCellAreaPrivate *priv;
g_return_val_if_fail (GTK_IS_CELL_AREA (area), NULL);
priv = area->priv;
return priv->edited_cell;
}
/**
* gtk_cell_area_get_edit_widget:
* @area: a #GtkCellArea
*
* Gets the #GtkCellEditable widget currently used
* to edit the currently edited cell.
*
* Return value: The currently active #GtkCellEditable widget
*
* Since: 3.0
*/
GtkCellEditable *
gtk_cell_area_get_edit_widget (GtkCellArea *area)
{
GtkCellAreaPrivate *priv;
g_return_val_if_fail (GTK_IS_CELL_AREA (area), NULL);
priv = area->priv;
return priv->edit_widget;
}
/**
* gtk_cell_area_activate_cell:
* @area: a #GtkCellArea
* @widget: the #GtkWidget that @area is rendering onto
* @renderer: the #GtkCellRenderer in @area to activate
* @event: the #GdkEvent for which cell activation should occur
* @cell_area: the #GdkRectangle in @widget relative coordinates
* of @renderer for the current row.
* @flags: the #GtkCellRendererState for @renderer
*
* This is used by #GtkCellArea subclasses when handling events
* to activate cells, the base #GtkCellArea class activates cells
* for keyboard events for free in it's own GtkCellArea->activate()
* implementation.
*
* Return value: whether cell activation was successful
*
* Since: 3.0
*/
gboolean
gtk_cell_area_activate_cell (GtkCellArea *area,
GtkWidget *widget,
GtkCellRenderer *renderer,
GdkEvent *event,
const GdkRectangle *cell_area,
GtkCellRendererState flags)
{
GtkCellRendererMode mode;
GdkRectangle inner_area;
GtkCellAreaPrivate *priv;
g_return_val_if_fail (GTK_IS_CELL_AREA (area), FALSE);
g_return_val_if_fail (GTK_IS_WIDGET (widget), FALSE);
g_return_val_if_fail (GTK_IS_CELL_RENDERER (renderer), FALSE);
g_return_val_if_fail (cell_area != NULL, FALSE);
priv = area->priv;
/* Remove margins from the background area to produce the cell area.
*
* XXX Maybe have to do some rtl mode treatment here...
*/
gtk_cell_area_inner_cell_area (area, widget, cell_area, &inner_area);
g_object_get (renderer, "mode", &mode, NULL);
if (mode == GTK_CELL_RENDERER_MODE_ACTIVATABLE)
{
if (gtk_cell_renderer_activate (renderer,
event, widget,
priv->current_path,
cell_area,
&inner_area,
flags))
return TRUE;
}
else if (mode == GTK_CELL_RENDERER_MODE_EDITABLE)
{
GtkCellEditable *editable_widget;
editable_widget =
gtk_cell_renderer_start_editing (renderer,
event, widget,
priv->current_path,
cell_area,
&inner_area,
flags);
if (editable_widget != NULL)
{
g_return_val_if_fail (GTK_IS_CELL_EDITABLE (editable_widget), FALSE);
gtk_cell_area_set_edited_cell (area, renderer);
gtk_cell_area_set_edit_widget (area, editable_widget);
/* Signal that editing started so that callers can get
* a handle on the editable_widget */
gtk_cell_area_add_editable (area, priv->focus_cell, editable_widget, &inner_area);
/* If the signal was successfully handled start the editing */
if (gtk_widget_get_parent (GTK_WIDGET (editable_widget)))
{
gtk_cell_editable_start_editing (editable_widget, NULL);
gtk_widget_grab_focus (GTK_WIDGET (editable_widget));
}
else
{
/* Otherwise clear the editing state and fire a warning */
gtk_cell_area_set_edited_cell (area, NULL);
gtk_cell_area_set_edit_widget (area, NULL);
g_warning ("GtkCellArea::add-editable fired in the dark, no cell editing was started.");
}
return TRUE;
}
}
return FALSE;
}
/**
* gtk_cell_area_stop_editing:
* @area: a #GtkCellArea
* @canceled: whether editing was canceled.
*
* Explicitly stops the editing of the currently
* edited cell (see gtk_cell_area_get_edited_cell()).
*
* If @canceled is %TRUE, the cell renderer will emit
* the ::editing-canceled signal.
*
* Since: 3.0
*/
void
gtk_cell_area_stop_editing (GtkCellArea *area,
gboolean canceled)
{
GtkCellAreaPrivate *priv;
g_return_if_fail (GTK_IS_CELL_AREA (area));
priv = area->priv;
if (priv->edited_cell)
{
GtkCellEditable *edit_widget = g_object_ref (priv->edit_widget);
GtkCellRenderer *edit_cell = g_object_ref (priv->edited_cell);
/* Stop editing of the cell renderer */
gtk_cell_renderer_stop_editing (priv->edited_cell, canceled);
/* Remove any references to the editable widget */
gtk_cell_area_set_edited_cell (area, NULL);
gtk_cell_area_set_edit_widget (area, NULL);
/* Send the remove-widget signal explicitly (this is done after setting
* the edit cell/widget NULL to avoid feedback)
*/
gtk_cell_area_remove_editable (area, edit_cell, edit_widget);
g_object_unref (edit_cell);
g_object_unref (edit_widget);
}
}
/*************************************************************
* API: Convenience for area implementations *
*************************************************************/
/**
* gtk_cell_area_inner_cell_area:
* @area: a #GtkCellArea
* @widget: the #GtkWidget that @area is rendering onto
* @cell_area: the @widget relative coordinates where one of @area's cells
* is to be placed
* @inner_area: (out): the return location for the inner cell area
*
* This is a convenience function for #GtkCellArea implementations
* to get the inner area where a given #GtkCellRenderer will be
* rendered. It removes any padding previously added by gtk_cell_area_request_renderer().
*
* Since: 3.0
*/
void
gtk_cell_area_inner_cell_area (GtkCellArea *area,
GtkWidget *widget,
const GdkRectangle *cell_area,
GdkRectangle *inner_area)
{
gint focus_line_width;
g_return_if_fail (GTK_IS_CELL_AREA (area));
g_return_if_fail (GTK_IS_WIDGET (widget));
g_return_if_fail (cell_area != NULL);
g_return_if_fail (inner_area != NULL);
gtk_widget_style_get (widget, "focus-line-width", &focus_line_width, NULL);
*inner_area = *cell_area;
inner_area->x += focus_line_width;
inner_area->width -= focus_line_width * 2;
inner_area->y += focus_line_width;
inner_area->height -= focus_line_width * 2;
}
/**
* gtk_cell_area_request_renderer:
* @area: a #GtkCellArea
* @renderer: the #GtkCellRenderer to request size for
* @orientation: the #GtkOrientation in which to request size
* @widget: the #GtkWidget that @area is rendering onto
* @for_size: the allocation contextual size to request for, or -1 if
* the base request for the orientation is to be returned.
* @minimum_size: (out) (allow-none): location to store the minimum size, or %NULL
* @natural_size: (out) (allow-none): location to store the natural size, or %NULL
*
* This is a convenience function for #GtkCellArea implementations
* to request size for cell renderers. It's important to use this
* function to request size and then use gtk_cell_area_inner_cell_area()
* at render and event time since this function will add padding
* around the cell for focus painting.
*
* Since: 3.0
*/
void
gtk_cell_area_request_renderer (GtkCellArea *area,
GtkCellRenderer *renderer,
GtkOrientation orientation,
GtkWidget *widget,
gint for_size,
gint *minimum_size,
gint *natural_size)
{
GtkCellAreaPrivate *priv;
gint focus_line_width;
g_return_if_fail (GTK_IS_CELL_AREA (area));
g_return_if_fail (GTK_IS_CELL_RENDERER (renderer));
g_return_if_fail (GTK_IS_WIDGET (widget));
g_return_if_fail (minimum_size != NULL);
g_return_if_fail (natural_size != NULL);
priv = area->priv;
gtk_widget_style_get (widget, "focus-line-width", &focus_line_width, NULL);
focus_line_width *= 2;
if (orientation == GTK_ORIENTATION_HORIZONTAL)
{
if (for_size < 0)
gtk_cell_renderer_get_preferred_width (renderer, widget, minimum_size, natural_size);
else
{
for_size = MAX (0, for_size - focus_line_width);
gtk_cell_renderer_get_preferred_width_for_height (renderer, widget, for_size,
minimum_size, natural_size);
}
}
else /* GTK_ORIENTATION_VERTICAL */
{
if (for_size < 0)
gtk_cell_renderer_get_preferred_height (renderer, widget, minimum_size, natural_size);
else
{
for_size = MAX (0, for_size - focus_line_width);
gtk_cell_renderer_get_preferred_height_for_width (renderer, widget, for_size,
minimum_size, natural_size);
}
}
*minimum_size += focus_line_width;
*natural_size += focus_line_width;
}
Reference in New Issue View Git Blame Copy Permalink