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gtk2/gtk/gtkcellrenderer.c
Matthias Clasen 113f364a37 More of the same
2006-05-14 04:25:34 +00:00

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/* gtkcellrenderer.c
* Copyright (C) 2000 Red Hat, Inc. Jonathan Blandford
*
* 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.
*/
#include <config.h>
#include "gtkcellrenderer.h"
#include "gtkintl.h"
#include "gtkmarshalers.h"
#include "gtkprivate.h"
#include "gtktreeprivate.h"
#include "gtkalias.h"
static void gtk_cell_renderer_get_property (GObject *object,
guint param_id,
GValue *value,
GParamSpec *pspec);
static void gtk_cell_renderer_set_property (GObject *object,
guint param_id,
const GValue *value,
GParamSpec *pspec);
static void set_cell_bg_color (GtkCellRenderer *cell,
GdkColor *color);
#define GTK_CELL_RENDERER_GET_PRIVATE(obj) (G_TYPE_INSTANCE_GET_PRIVATE ((obj), GTK_TYPE_CELL_RENDERER, GtkCellRendererPrivate))
typedef struct _GtkCellRendererPrivate GtkCellRendererPrivate;
struct _GtkCellRendererPrivate
{
GdkColor cell_background;
};
enum {
PROP_ZERO,
PROP_MODE,
PROP_VISIBLE,
PROP_SENSITIVE,
PROP_XALIGN,
PROP_YALIGN,
PROP_XPAD,
PROP_YPAD,
PROP_WIDTH,
PROP_HEIGHT,
PROP_IS_EXPANDER,
PROP_IS_EXPANDED,
PROP_CELL_BACKGROUND,
PROP_CELL_BACKGROUND_GDK,
PROP_CELL_BACKGROUND_SET
};
/* Signal IDs */
enum {
EDITING_CANCELED,
EDITING_STARTED,
LAST_SIGNAL
};
static guint cell_renderer_signals[LAST_SIGNAL] = { 0 };
G_DEFINE_ABSTRACT_TYPE (GtkCellRenderer, gtk_cell_renderer, GTK_TYPE_OBJECT)
static void
gtk_cell_renderer_init (GtkCellRenderer *cell)
{
cell->mode = GTK_CELL_RENDERER_MODE_INERT;
cell->visible = TRUE;
cell->width = -1;
cell->height = -1;
cell->xalign = 0.5;
cell->yalign = 0.5;
cell->xpad = 0;
cell->ypad = 0;
cell->sensitive = TRUE;
cell->is_expander = FALSE;
cell->is_expanded = FALSE;
cell->editing = FALSE;
}
static void
gtk_cell_renderer_class_init (GtkCellRendererClass *class)
{
GObjectClass *object_class = G_OBJECT_CLASS (class);
object_class->get_property = gtk_cell_renderer_get_property;
object_class->set_property = gtk_cell_renderer_set_property;
class->render = NULL;
class->get_size = NULL;
/**
* GtkCellRenderer::editing-canceled:
* @renderer: the object which received the signal
*
* This signal gets emitted when the user cancels the process of editing a
* cell. For example, an editable cell renderer could be written to cancel
* editing when the user presses Escape.
*
* See also: gtk_cell_renderer_editing_canceled()
*
* Since: 2.4
*/
cell_renderer_signals[EDITING_CANCELED] =
g_signal_new (I_("editing-canceled"),
G_OBJECT_CLASS_TYPE (object_class),
G_SIGNAL_RUN_FIRST,
G_STRUCT_OFFSET (GtkCellRendererClass, editing_canceled),
NULL, NULL,
_gtk_marshal_VOID__VOID,
G_TYPE_NONE, 0);
/**
* GtkCellRenderer::editing-started:
* @renderer: the object which received the signal
* @editable: the #GtkCellEditable
* @path: the path identifying the edited cell
*
* This signal gets emitted when a cell starts to be edited.
* The indended use of this signal is to do special setup
* on @editable, e.g. adding a #GtkEntryCompletion or setting
* up additional columns in a #GtkComboBox.
*
* Note that GTK+ doesn't guarantee that cell renderers will
* continue to use the same kind of widget for editing in future
* releases, therefore you should check the type of @editable
* before doing any specific setup, as in the following example:
*
* <informalexample><programlisting>
* static void
* text_editing_started (GtkCellRenderer *cell,
* GtkCellEditable *editable,
* const gchar *path,
* gpointer data)
* {
* if (GTK_IS_ENTRY (editable))
* {
* GtkEntry *entry = GTK_ENTRY (editable);
* <!-- -->
* /<!-- -->* ... create a GtkEntryCompletion *<!-- -->/
* <!-- -->
* gtk_entry_set_completion (entry, completion);
* }
* }
* </programlisting></informalexample>
*
* Since: 2.6
*/
cell_renderer_signals[EDITING_STARTED] =
g_signal_new (I_("editing-started"),
G_OBJECT_CLASS_TYPE (object_class),
G_SIGNAL_RUN_FIRST,
G_STRUCT_OFFSET (GtkCellRendererClass, editing_started),
NULL, NULL,
_gtk_marshal_VOID__OBJECT_STRING,
G_TYPE_NONE, 2,
GTK_TYPE_CELL_EDITABLE,
G_TYPE_STRING);
g_object_class_install_property (object_class,
PROP_MODE,
g_param_spec_enum ("mode",
P_("mode"),
P_("Editable mode of the CellRenderer"),
GTK_TYPE_CELL_RENDERER_MODE,
GTK_CELL_RENDERER_MODE_INERT,
GTK_PARAM_READWRITE));
g_object_class_install_property (object_class,
PROP_VISIBLE,
g_param_spec_boolean ("visible",
P_("visible"),
P_("Display the cell"),
TRUE,
GTK_PARAM_READWRITE));
g_object_class_install_property (object_class,
PROP_SENSITIVE,
g_param_spec_boolean ("sensitive",
P_("Sensitive"),
P_("Display the cell sensitive"),
TRUE,
GTK_PARAM_READWRITE));
g_object_class_install_property (object_class,
PROP_XALIGN,
g_param_spec_float ("xalign",
P_("xalign"),
P_("The x-align"),
0.0,
1.0,
0.5,
GTK_PARAM_READWRITE));
g_object_class_install_property (object_class,
PROP_YALIGN,
g_param_spec_float ("yalign",
P_("yalign"),
P_("The y-align"),
0.0,
1.0,
0.5,
GTK_PARAM_READWRITE));
g_object_class_install_property (object_class,
PROP_XPAD,
g_param_spec_uint ("xpad",
P_("xpad"),
P_("The xpad"),
0,
G_MAXUINT,
0,
GTK_PARAM_READWRITE));
g_object_class_install_property (object_class,
PROP_YPAD,
g_param_spec_uint ("ypad",
P_("ypad"),
P_("The ypad"),
0,
G_MAXUINT,
0,
GTK_PARAM_READWRITE));
g_object_class_install_property (object_class,
PROP_WIDTH,
g_param_spec_int ("width",
P_("width"),
P_("The fixed width"),
-1,
G_MAXINT,
-1,
GTK_PARAM_READWRITE));
g_object_class_install_property (object_class,
PROP_HEIGHT,
g_param_spec_int ("height",
P_("height"),
P_("The fixed height"),
-1,
G_MAXINT,
-1,
GTK_PARAM_READWRITE));
g_object_class_install_property (object_class,
PROP_IS_EXPANDER,
g_param_spec_boolean ("is-expander",
P_("Is Expander"),
P_("Row has children"),
FALSE,
GTK_PARAM_READWRITE));
g_object_class_install_property (object_class,
PROP_IS_EXPANDED,
g_param_spec_boolean ("is-expanded",
P_("Is Expanded"),
P_("Row is an expander row, and is expanded"),
FALSE,
GTK_PARAM_READWRITE));
g_object_class_install_property (object_class,
PROP_CELL_BACKGROUND,
g_param_spec_string ("cell-background",
P_("Cell background color name"),
P_("Cell background color as a string"),
NULL,
GTK_PARAM_WRITABLE));
g_object_class_install_property (object_class,
PROP_CELL_BACKGROUND_GDK,
g_param_spec_boxed ("cell-background-gdk",
P_("Cell background color"),
P_("Cell background color as a GdkColor"),
GDK_TYPE_COLOR,
GTK_PARAM_READWRITE));
#define ADD_SET_PROP(propname, propval, nick, blurb) g_object_class_install_property (object_class, propval, g_param_spec_boolean (propname, nick, blurb, FALSE, GTK_PARAM_READWRITE))
ADD_SET_PROP ("cell-background-set", PROP_CELL_BACKGROUND_SET,
P_("Cell background set"),
P_("Whether this tag affects the cell background color"));
g_type_class_add_private (object_class, sizeof (GtkCellRendererPrivate));
}
static void
gtk_cell_renderer_get_property (GObject *object,
guint param_id,
GValue *value,
GParamSpec *pspec)
{
GtkCellRenderer *cell = GTK_CELL_RENDERER (object);
GtkCellRendererPrivate *priv = GTK_CELL_RENDERER_GET_PRIVATE (object);
switch (param_id)
{
case PROP_MODE:
g_value_set_enum (value, cell->mode);
break;
case PROP_VISIBLE:
g_value_set_boolean (value, cell->visible);
break;
case PROP_SENSITIVE:
g_value_set_boolean (value, cell->sensitive);
break;
case PROP_XALIGN:
g_value_set_float (value, cell->xalign);
break;
case PROP_YALIGN:
g_value_set_float (value, cell->yalign);
break;
case PROP_XPAD:
g_value_set_uint (value, cell->xpad);
break;
case PROP_YPAD:
g_value_set_uint (value, cell->ypad);
break;
case PROP_WIDTH:
g_value_set_int (value, cell->width);
break;
case PROP_HEIGHT:
g_value_set_int (value, cell->height);
break;
case PROP_IS_EXPANDER:
g_value_set_boolean (value, cell->is_expander);
break;
case PROP_IS_EXPANDED:
g_value_set_boolean (value, cell->is_expanded);
break;
case PROP_CELL_BACKGROUND_GDK:
{
GdkColor color;
color.red = priv->cell_background.red;
color.green = priv->cell_background.green;
color.blue = priv->cell_background.blue;
g_value_set_boxed (value, &color);
}
break;
case PROP_CELL_BACKGROUND_SET:
g_value_set_boolean (value, cell->cell_background_set);
break;
case PROP_CELL_BACKGROUND:
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, param_id, pspec);
break;
}
}
static void
gtk_cell_renderer_set_property (GObject *object,
guint param_id,
const GValue *value,
GParamSpec *pspec)
{
GtkCellRenderer *cell = GTK_CELL_RENDERER (object);
switch (param_id)
{
case PROP_MODE:
cell->mode = g_value_get_enum (value);
break;
case PROP_VISIBLE:
cell->visible = g_value_get_boolean (value);
break;
case PROP_SENSITIVE:
cell->sensitive = g_value_get_boolean (value);
break;
case PROP_XALIGN:
cell->xalign = g_value_get_float (value);
break;
case PROP_YALIGN:
cell->yalign = g_value_get_float (value);
break;
case PROP_XPAD:
cell->xpad = g_value_get_uint (value);
break;
case PROP_YPAD:
cell->ypad = g_value_get_uint (value);
break;
case PROP_WIDTH:
cell->width = g_value_get_int (value);
break;
case PROP_HEIGHT:
cell->height = g_value_get_int (value);
break;
case PROP_IS_EXPANDER:
cell->is_expander = g_value_get_boolean (value);
break;
case PROP_IS_EXPANDED:
cell->is_expanded = g_value_get_boolean (value);
break;
case PROP_CELL_BACKGROUND:
{
GdkColor color;
if (!g_value_get_string (value))
set_cell_bg_color (cell, NULL);
else if (gdk_color_parse (g_value_get_string (value), &color))
set_cell_bg_color (cell, &color);
else
g_warning ("Don't know color `%s'", g_value_get_string (value));
g_object_notify (object, "cell-background-gdk");
}
break;
case PROP_CELL_BACKGROUND_GDK:
set_cell_bg_color (cell, g_value_get_boxed (value));
break;
case PROP_CELL_BACKGROUND_SET:
cell->cell_background_set = g_value_get_boolean (value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, param_id, pspec);
break;
}
}
static void
set_cell_bg_color (GtkCellRenderer *cell,
GdkColor *color)
{
GtkCellRendererPrivate *priv = GTK_CELL_RENDERER_GET_PRIVATE (cell);
if (color)
{
if (!cell->cell_background_set)
{
cell->cell_background_set = TRUE;
g_object_notify (G_OBJECT (cell), "cell-background-set");
}
priv->cell_background.red = color->red;
priv->cell_background.green = color->green;
priv->cell_background.blue = color->blue;
}
else
{
if (cell->cell_background_set)
{
cell->cell_background_set = FALSE;
g_object_notify (G_OBJECT (cell), "cell-background-set");
}
}
}
/**
* gtk_cell_renderer_get_size:
* @cell: a #GtkCellRenderer
* @widget: the widget the renderer is rendering to
* @cell_area: The area a cell will be allocated, or %NULL
* @x_offset: location to return x offset of cell relative to @cell_area, or %NULL
* @y_offset: location to return y offset of cell relative to @cell_area, or %NULL
* @width: location to return width needed to render a cell, or %NULL
* @height: location to return height needed to render a cell, or %NULL
*
* Obtains the width and height needed to render the cell. Used by view widgets
* to determine the appropriate size for the cell_area passed to
* gtk_cell_renderer_render(). If @cell_area is not %NULL, fills in the x and y
* offsets (if set) of the cell relative to this location. Please note that the
* values set in @width and @height, as well as those in @x_offset and @y_offset
* are inclusive of the xpad and ypad properties.
**/
void
gtk_cell_renderer_get_size (GtkCellRenderer *cell,
GtkWidget *widget,
GdkRectangle *cell_area,
gint *x_offset,
gint *y_offset,
gint *width,
gint *height)
{
gint *real_width = width;
gint *real_height = height;
g_return_if_fail (GTK_IS_CELL_RENDERER (cell));
g_return_if_fail (GTK_CELL_RENDERER_GET_CLASS (cell)->get_size != NULL);
if (width && cell->width != -1)
{
real_width = NULL;
*width = cell->width;
}
if (height && cell->height != -1)
{
real_height = NULL;
*height = cell->height;
}
GTK_CELL_RENDERER_GET_CLASS (cell)->get_size (cell,
widget,
cell_area,
x_offset,
y_offset,
real_width,
real_height);
}
/**
* gtk_cell_renderer_render:
* @cell: a #GtkCellRenderer
* @window: a #GdkDrawable to draw to
* @widget: the widget owning @window
* @background_area: entire cell area (including tree expanders and maybe padding on the sides)
* @cell_area: area normally rendered by a cell renderer
* @expose_area: area that actually needs updating
* @flags: flags that affect rendering
*
* Invokes the virtual render function of the #GtkCellRenderer. The three
* passed-in rectangles are areas of @window. Most renderers will draw within
* @cell_area; the xalign, yalign, xpad, and ypad fields of the #GtkCellRenderer
* should be honored with respect to @cell_area. @background_area includes the
* blank space around the cell, and also the area containing the tree expander;
* so the @background_area rectangles for all cells tile to cover the entire
* @window. @expose_area is a clip rectangle.
*
**/
void
gtk_cell_renderer_render (GtkCellRenderer *cell,
GdkWindow *window,
GtkWidget *widget,
GdkRectangle *background_area,
GdkRectangle *cell_area,
GdkRectangle *expose_area,
GtkCellRendererState flags)
{
gboolean selected = FALSE;
GtkCellRendererPrivate *priv = GTK_CELL_RENDERER_GET_PRIVATE (cell);
g_return_if_fail (GTK_IS_CELL_RENDERER (cell));
g_return_if_fail (GTK_CELL_RENDERER_GET_CLASS (cell)->render != NULL);
selected = (flags & GTK_CELL_RENDERER_SELECTED) == GTK_CELL_RENDERER_SELECTED;
if (cell->cell_background_set && !selected)
{
cairo_t *cr = gdk_cairo_create (window);
gdk_cairo_rectangle (cr, background_area);
gdk_cairo_set_source_color (cr, &priv->cell_background);
cairo_fill (cr);
cairo_destroy (cr);
}
GTK_CELL_RENDERER_GET_CLASS (cell)->render (cell,
window,
widget,
background_area,
cell_area,
expose_area,
flags);
}
/**
* gtk_cell_renderer_activate:
* @cell: a #GtkCellRenderer
* @event: a #GdkEvent
* @widget: widget that received the event
* @path: widget-dependent string representation of the event location; e.g. for #GtkTreeView, a string representation of #GtkTreePath
* @background_area: background area as passed to @gtk_cell_renderer_render
* @cell_area: cell area as passed to @gtk_cell_renderer_render
* @flags: render flags
*
* Passes an activate event to the cell renderer for possible processing. Some
* cell renderers may use events; for example, #GtkCellRendererToggle toggles
* when it gets a mouse click.
*
* Return value: %TRUE if the event was consumed/handled
**/
gboolean
gtk_cell_renderer_activate (GtkCellRenderer *cell,
GdkEvent *event,
GtkWidget *widget,
const gchar *path,
GdkRectangle *background_area,
GdkRectangle *cell_area,
GtkCellRendererState flags)
{
g_return_val_if_fail (GTK_IS_CELL_RENDERER (cell), FALSE);
if (cell->mode != GTK_CELL_RENDERER_MODE_ACTIVATABLE)
return FALSE;
if (GTK_CELL_RENDERER_GET_CLASS (cell)->activate == NULL)
return FALSE;
return GTK_CELL_RENDERER_GET_CLASS (cell)->activate (cell,
event,
widget,
path,
background_area,
cell_area,
flags);
}
/**
* gtk_cell_renderer_start_editing:
* @cell: a #GtkCellRenderer
* @event: a #GdkEvent
* @widget: widget that received the event
* @path: widget-dependent string representation of the event location; e.g. for #GtkTreeView, a string representation of #GtkTreePath
* @background_area: background area as passed to @gtk_cell_renderer_render
* @cell_area: cell area as passed to @gtk_cell_renderer_render
* @flags: render flags
*
* Passes an activate event to the cell renderer for possible processing.
*
* Return value: A new #GtkCellEditable, or %NULL
**/
GtkCellEditable *
gtk_cell_renderer_start_editing (GtkCellRenderer *cell,
GdkEvent *event,
GtkWidget *widget,
const gchar *path,
GdkRectangle *background_area,
GdkRectangle *cell_area,
GtkCellRendererState flags)
{
GtkCellEditable *editable;
g_return_val_if_fail (GTK_IS_CELL_RENDERER (cell), NULL);
if (cell->mode != GTK_CELL_RENDERER_MODE_EDITABLE)
return NULL;
if (GTK_CELL_RENDERER_GET_CLASS (cell)->start_editing == NULL)
return NULL;
editable = GTK_CELL_RENDERER_GET_CLASS (cell)->start_editing (cell,
event,
widget,
path,
background_area,
cell_area,
flags);
g_signal_emit (cell,
cell_renderer_signals[EDITING_STARTED], 0,
editable, path);
cell->editing = TRUE;
return editable;
}
/**
* gtk_cell_renderer_set_fixed_size:
* @cell: A #GtkCellRenderer
* @width: the width of the cell renderer, or -1
* @height: the height of the cell renderer, or -1
*
* Sets the renderer size to be explicit, independent of the properties set.
**/
void
gtk_cell_renderer_set_fixed_size (GtkCellRenderer *cell,
gint width,
gint height)
{
g_return_if_fail (GTK_IS_CELL_RENDERER (cell));
g_return_if_fail (width >= -1 && height >= -1);
if ((width != cell->width) || (height != cell->height))
{
g_object_freeze_notify (G_OBJECT (cell));
if (width != cell->width)
{
cell->width = width;
g_object_notify (G_OBJECT (cell), "width");
}
if (height != cell->height)
{
cell->height = height;
g_object_notify (G_OBJECT (cell), "height");
}
g_object_thaw_notify (G_OBJECT (cell));
}
}
/**
* gtk_cell_renderer_get_fixed_size:
* @cell: A #GtkCellRenderer
* @width: location to fill in with the fixed width of the widget, or %NULL
* @height: location to fill in with the fixed height of the widget, or %NULL
*
* Fills in @width and @height with the appropriate size of @cell.
**/
void
gtk_cell_renderer_get_fixed_size (GtkCellRenderer *cell,
gint *width,
gint *height)
{
g_return_if_fail (GTK_IS_CELL_RENDERER (cell));
if (width)
(* width) = cell->width;
if (height)
(* height) = cell->height;
}
/**
* gtk_cell_renderer_editing_canceled:
* @cell: A #GtkCellRenderer
*
* Causes the cell renderer to emit the "editing-canceled" signal. This
* function is for use only by implementations of cell renderers that need to
* notify the client program that an editing process was canceled and the
* changes were not committed.
*
* Since: 2.4
* Deprecated: 2.6: Use gtk_cell_renderer_stop_editing() instead
**/
void
gtk_cell_renderer_editing_canceled (GtkCellRenderer *cell)
{
g_return_if_fail (GTK_IS_CELL_RENDERER (cell));
gtk_cell_renderer_stop_editing (cell, TRUE);
}
/**
* gtk_cell_renderer_stop_editing:
* @cell: A #GtkCellRenderer
* @canceled: %TRUE if the editing has been canceled
*
* Informs the cell renderer that the editing is stopped.
* If @canceled is %TRUE, the cell renderer will emit the "editing-canceled"
* signal. This function should be called by cell renderer implementations
* in response to the "editing-done" signal of #GtkCellEditable.
*
* Since: 2.6
**/
void
gtk_cell_renderer_stop_editing (GtkCellRenderer *cell,
gboolean canceled)
{
g_return_if_fail (GTK_IS_CELL_RENDERER (cell));
if (cell->editing)
{
cell->editing = FALSE;
if (canceled)
g_signal_emit (cell, cell_renderer_signals[EDITING_CANCELED], 0);
}
}
#define __GTK_CELL_RENDERER_C__
#include "gtkaliasdef.c"
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