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gtk/gtk/gtkcellarea.h
Matthias Clasen f4d02bd9c1 GtkCellArea: allow finding attributes at runtime 
This will allow e.g. GtkInspector to display attribute mappings.

http://bugzilla.gnome.org/show_bug.cgi?id=729817
2014-05-08 14:09:04 -04:00

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/* gtkcellarea.h
*
* 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, see <http://www.gnu.org/licenses/>.
*/
#ifndef __GTK_CELL_AREA_H__
#define __GTK_CELL_AREA_H__
#if !defined (__GTK_H_INSIDE__) && !defined (GTK_COMPILATION)
#error "Only <gtk/gtk.h> can be included directly."
#endif
#include <gtk/gtkcellrenderer.h>
#include <gtk/gtkwidget.h>
#include <gtk/gtktreemodel.h>
G_BEGIN_DECLS
#define GTK_TYPE_CELL_AREA (gtk_cell_area_get_type ())
#define GTK_CELL_AREA(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), GTK_TYPE_CELL_AREA, GtkCellArea))
#define GTK_CELL_AREA_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), GTK_TYPE_CELL_AREA, GtkCellAreaClass))
#define GTK_IS_CELL_AREA(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GTK_TYPE_CELL_AREA))
#define GTK_IS_CELL_AREA_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), GTK_TYPE_CELL_AREA))
#define GTK_CELL_AREA_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), GTK_TYPE_CELL_AREA, GtkCellAreaClass))
typedef struct _GtkCellArea GtkCellArea;
typedef struct _GtkCellAreaClass GtkCellAreaClass;
typedef struct _GtkCellAreaPrivate GtkCellAreaPrivate;
typedef struct _GtkCellAreaContext GtkCellAreaContext;
/**
* GTK_CELL_AREA_WARN_INVALID_CELL_PROPERTY_ID:
* @object: the #GObject on which set_cell_property() or get_cell_property()
* was called
* @property_id: the numeric id of the property
* @pspec: the #GParamSpec of the property
*
* This macro should be used to emit a standard warning about unexpected
* properties in set_cell_property() and get_cell_property() implementations.
*/
#define GTK_CELL_AREA_WARN_INVALID_CELL_PROPERTY_ID(object, property_id, pspec) \
G_OBJECT_WARN_INVALID_PSPEC ((object), "cell property id", (property_id), (pspec))
/**
* GtkCellCallback:
* @renderer: the cell renderer to operate on
* @data: (closure): user-supplied data
*
* The type of the callback functions used for iterating over
* the cell renderers of a #GtkCellArea, see gtk_cell_area_foreach().
*
* Returns: %TRUE to stop iterating over cells.
*/
typedef gboolean (*GtkCellCallback) (GtkCellRenderer *renderer,
gpointer data);
/**
* GtkCellAllocCallback:
* @renderer: the cell renderer to operate on
* @cell_area: the area allocated to @renderer inside the rectangle
* provided to gtk_cell_area_foreach_alloc().
* @cell_background: the background area for @renderer inside the
* background area provided to gtk_cell_area_foreach_alloc().
* @data: (closure): user-supplied data
*
* The type of the callback functions used for iterating over the
* cell renderers and their allocated areas inside a #GtkCellArea,
* see gtk_cell_area_foreach_alloc().
*
* Returns: %TRUE to stop iterating over cells.
*/
typedef gboolean (*GtkCellAllocCallback) (GtkCellRenderer *renderer,
const GdkRectangle *cell_area,
const GdkRectangle *cell_background,
gpointer data);
struct _GtkCellArea
{
/*< private >*/
GInitiallyUnowned parent_instance;
GtkCellAreaPrivate *priv;
};
/**
* GtkCellAreaClass:
* @add: adds a #GtkCellRenderer to the area.
* @remove: removes a #GtkCellRenderer from the area.
* @foreach: calls the #GtkCellCallback function on every #GtkCellRenderer in
* the area with the provided user data until the callback returns %TRUE.
* @foreach_alloc: Calls the #GtkCellAllocCallback function on every
* #GtkCellRenderer in the area with the allocated area for the cell
* and the provided user data until the callback returns %TRUE.
* @event: Handle an event in the area, this is generally used to activate
* a cell at the event location for button events but can also be used
* to generically pass events to #GtkWidgets drawn onto the area.
* @render: Actually render the area’s cells to the specified rectangle,
* @background_area should be correctly distributed to the cells
* corresponding background areas.
* @apply_attributes: Apply the cell attributes to the cells. This is
* implemented as a signal and generally #GtkCellArea subclasses don't
* need to implement it since it is handled by the base class.
* @create_context: Creates and returns a class specific #GtkCellAreaContext
* to store cell alignment and allocation details for a said #GtkCellArea
* class.
* @copy_context: Creates a new #GtkCellAreaContext in the same state as
* the passed @context with any cell alignment data and allocations intact.
* @get_request_mode: This allows an area to tell its layouting widget whether
* it prefers to be allocated in %GTK_SIZE_REQUEST_HEIGHT_FOR_WIDTH or
* %GTK_SIZE_REQUEST_WIDTH_FOR_HEIGHT mode.
* @get_preferred_width: Calculates the minimum and natural width of the
* areas cells with the current attributes applied while considering
* the particular layouting details of the said #GtkCellArea. While
* requests are performed over a series of rows, alignments and overall
* minimum and natural sizes should be stored in the corresponding
* #GtkCellAreaContext.
* @get_preferred_height_for_width: Calculates the minimum and natural height
* for the area if the passed @context would be allocated the given width.
* When implementing this virtual method it is safe to assume that @context
* has already stored the aligned cell widths for every #GtkTreeModel row
* that @context will be allocated for since this information was stored
* at #GtkCellAreaClass.get_preferred_width() time. This virtual method
* should also store any necessary alignments of cell heights for the
* case that the context is allocated a height.
* @get_preferred_height: Calculates the minimum and natural height of the
* areas cells with the current attributes applied. Essentially this is
* the same as #GtkCellAreaClass.get_preferred_width() only for areas
* that are being requested as %GTK_SIZE_REQUEST_WIDTH_FOR_HEIGHT.
* @get_preferred_width_for_height: Calculates the minimum and natural width
* for the area if the passed @context would be allocated the given
* height. The same as #GtkCellAreaClass.get_preferred_height_for_width()
* only for handling requests in the %GTK_SIZE_REQUEST_WIDTH_FOR_HEIGHT
* mode.
* @set_cell_property: This should be implemented to handle changes in child
* cell properties for a given #GtkCellRenderer that were previously
* installed on the #GtkCellAreaClass with gtk_cell_area_class_install_cell_property().
* @get_cell_property: This should be implemented to report the values of
* child cell properties for a given child #GtkCellRenderer.
* @focus: This virtual method should be implemented to navigate focus from
* cell to cell inside the #GtkCellArea. The #GtkCellArea should move
* focus from cell to cell inside the area and return %FALSE if focus
* logically leaves the area with the following exceptions: When the
* area contains no activatable cells, the entire area recieves focus.
* Focus should not be given to cells that are actually “focus siblings”
* of other sibling cells (see gtk_cell_area_get_focus_from_sibling()).
* Focus is set by calling gtk_cell_area_set_focus_cell().
* @is_activatable: Returns whether the #GtkCellArea can respond to
* #GtkCellAreaClass.activate(), usually this does not need to be
* implemented since the base class takes care of this however it can
* be enhanced if the #GtkCellArea subclass can handle activation in
* other ways than activating its #GtkCellRenderers.
* @activate: This is called when the layouting widget rendering the
* #GtkCellArea activates the focus cell (see gtk_cell_area_get_focus_cell()).
*/
struct _GtkCellAreaClass
{
/*< private >*/
GInitiallyUnownedClass parent_class;
/*< public >*/
/* Basic methods */
void (* add) (GtkCellArea *area,
GtkCellRenderer *renderer);
void (* remove) (GtkCellArea *area,
GtkCellRenderer *renderer);
void (* foreach) (GtkCellArea *area,
GtkCellCallback callback,
gpointer callback_data);
void (* foreach_alloc) (GtkCellArea *area,
GtkCellAreaContext *context,
GtkWidget *widget,
const GdkRectangle *cell_area,
const GdkRectangle *background_area,
GtkCellAllocCallback callback,
gpointer callback_data);
gint (* event) (GtkCellArea *area,
GtkCellAreaContext *context,
GtkWidget *widget,
GdkEvent *event,
const GdkRectangle *cell_area,
GtkCellRendererState flags);
void (* render) (GtkCellArea *area,
GtkCellAreaContext *context,
GtkWidget *widget,
cairo_t *cr,
const GdkRectangle *background_area,
const GdkRectangle *cell_area,
GtkCellRendererState flags,
gboolean paint_focus);
void (* apply_attributes) (GtkCellArea *area,
GtkTreeModel *tree_model,
GtkTreeIter *iter,
gboolean is_expander,
gboolean is_expanded);
/* Geometry */
GtkCellAreaContext *(* create_context) (GtkCellArea *area);
GtkCellAreaContext *(* copy_context) (GtkCellArea *area,
GtkCellAreaContext *context);
GtkSizeRequestMode (* get_request_mode) (GtkCellArea *area);
void (* get_preferred_width) (GtkCellArea *area,
GtkCellAreaContext *context,
GtkWidget *widget,
gint *minimum_width,
gint *natural_width);
void (* get_preferred_height_for_width) (GtkCellArea *area,
GtkCellAreaContext *context,
GtkWidget *widget,
gint width,
gint *minimum_height,
gint *natural_height);
void (* get_preferred_height) (GtkCellArea *area,
GtkCellAreaContext *context,
GtkWidget *widget,
gint *minimum_height,
gint *natural_height);
void (* get_preferred_width_for_height) (GtkCellArea *area,
GtkCellAreaContext *context,
GtkWidget *widget,
gint height,
gint *minimum_width,
gint *natural_width);
/* Cell Properties */
void (* set_cell_property) (GtkCellArea *area,
GtkCellRenderer *renderer,
guint property_id,
const GValue *value,
GParamSpec *pspec);
void (* get_cell_property) (GtkCellArea *area,
GtkCellRenderer *renderer,
guint property_id,
GValue *value,
GParamSpec *pspec);
/* Focus */
gboolean (* focus) (GtkCellArea *area,
GtkDirectionType direction);
gboolean (* is_activatable) (GtkCellArea *area);
gboolean (* activate) (GtkCellArea *area,
GtkCellAreaContext *context,
GtkWidget *widget,
const GdkRectangle *cell_area,
GtkCellRendererState flags,
gboolean edit_only);
/*< private >*/
/* Padding for future expansion */
void (*_gtk_reserved1) (void);
void (*_gtk_reserved2) (void);
void (*_gtk_reserved3) (void);
void (*_gtk_reserved4) (void);
void (*_gtk_reserved5) (void);
void (*_gtk_reserved6) (void);
void (*_gtk_reserved7) (void);
void (*_gtk_reserved8) (void);
};
GDK_AVAILABLE_IN_ALL
GType gtk_cell_area_get_type (void) G_GNUC_CONST;
/* Basic methods */
GDK_AVAILABLE_IN_ALL
void gtk_cell_area_add (GtkCellArea *area,
GtkCellRenderer *renderer);
GDK_AVAILABLE_IN_ALL
void gtk_cell_area_remove (GtkCellArea *area,
GtkCellRenderer *renderer);
GDK_AVAILABLE_IN_ALL
gboolean gtk_cell_area_has_renderer (GtkCellArea *area,
GtkCellRenderer *renderer);
GDK_AVAILABLE_IN_ALL
void gtk_cell_area_foreach (GtkCellArea *area,
GtkCellCallback callback,
gpointer callback_data);
GDK_AVAILABLE_IN_ALL
void gtk_cell_area_foreach_alloc (GtkCellArea *area,
GtkCellAreaContext *context,
GtkWidget *widget,
const GdkRectangle *cell_area,
const GdkRectangle *background_area,
GtkCellAllocCallback callback,
gpointer callback_data);
GDK_AVAILABLE_IN_ALL
gint gtk_cell_area_event (GtkCellArea *area,
GtkCellAreaContext *context,
GtkWidget *widget,
GdkEvent *event,
const GdkRectangle *cell_area,
GtkCellRendererState flags);
GDK_AVAILABLE_IN_ALL
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);
GDK_AVAILABLE_IN_ALL
void gtk_cell_area_get_cell_allocation (GtkCellArea *area,
GtkCellAreaContext *context,
GtkWidget *widget,
GtkCellRenderer *renderer,
const GdkRectangle *cell_area,
GdkRectangle *allocation);
GDK_AVAILABLE_IN_ALL
GtkCellRenderer *gtk_cell_area_get_cell_at_position (GtkCellArea *area,
GtkCellAreaContext *context,
GtkWidget *widget,
const GdkRectangle *cell_area,
gint x,
gint y,
GdkRectangle *alloc_area);
/* Geometry */
GDK_AVAILABLE_IN_ALL
GtkCellAreaContext *gtk_cell_area_create_context (GtkCellArea *area);
GDK_AVAILABLE_IN_ALL
GtkCellAreaContext *gtk_cell_area_copy_context (GtkCellArea *area,
GtkCellAreaContext *context);
GDK_AVAILABLE_IN_ALL
GtkSizeRequestMode gtk_cell_area_get_request_mode (GtkCellArea *area);
GDK_AVAILABLE_IN_ALL
void gtk_cell_area_get_preferred_width (GtkCellArea *area,
GtkCellAreaContext *context,
GtkWidget *widget,
gint *minimum_width,
gint *natural_width);
GDK_AVAILABLE_IN_ALL
void gtk_cell_area_get_preferred_height_for_width (GtkCellArea *area,
GtkCellAreaContext *context,
GtkWidget *widget,
gint width,
gint *minimum_height,
gint *natural_height);
GDK_AVAILABLE_IN_ALL
void gtk_cell_area_get_preferred_height (GtkCellArea *area,
GtkCellAreaContext *context,
GtkWidget *widget,
gint *minimum_height,
gint *natural_height);
GDK_AVAILABLE_IN_ALL
void gtk_cell_area_get_preferred_width_for_height (GtkCellArea *area,
GtkCellAreaContext *context,
GtkWidget *widget,
gint height,
gint *minimum_width,
gint *natural_width);
GDK_AVAILABLE_IN_ALL
const gchar * gtk_cell_area_get_current_path_string (GtkCellArea *area);
/* Attributes */
GDK_AVAILABLE_IN_ALL
void gtk_cell_area_apply_attributes (GtkCellArea *area,
GtkTreeModel *tree_model,
GtkTreeIter *iter,
gboolean is_expander,
gboolean is_expanded);
GDK_AVAILABLE_IN_ALL
void gtk_cell_area_attribute_connect (GtkCellArea *area,
GtkCellRenderer *renderer,
const gchar *attribute,
gint column);
GDK_AVAILABLE_IN_ALL
void gtk_cell_area_attribute_disconnect (GtkCellArea *area,
GtkCellRenderer *renderer,
const gchar *attribute);
GDK_AVAILABLE_IN_3_14
gint gtk_cell_area_attribute_get_column (GtkCellArea *area,
GtkCellRenderer *renderer,
const gchar *attribute);
/* Cell Properties */
GDK_AVAILABLE_IN_ALL
void gtk_cell_area_class_install_cell_property (GtkCellAreaClass *aclass,
guint property_id,
GParamSpec *pspec);
GDK_AVAILABLE_IN_ALL
GParamSpec* gtk_cell_area_class_find_cell_property (GtkCellAreaClass *aclass,
const gchar *property_name);
GDK_AVAILABLE_IN_ALL
GParamSpec** gtk_cell_area_class_list_cell_properties (GtkCellAreaClass *aclass,
guint *n_properties);
GDK_AVAILABLE_IN_ALL
void gtk_cell_area_add_with_properties (GtkCellArea *area,
GtkCellRenderer *renderer,
const gchar *first_prop_name,
...) G_GNUC_NULL_TERMINATED;
GDK_AVAILABLE_IN_ALL
void gtk_cell_area_cell_set (GtkCellArea *area,
GtkCellRenderer *renderer,
const gchar *first_prop_name,
...) G_GNUC_NULL_TERMINATED;
GDK_AVAILABLE_IN_ALL
void gtk_cell_area_cell_get (GtkCellArea *area,
GtkCellRenderer *renderer,
const gchar *first_prop_name,
...) G_GNUC_NULL_TERMINATED;
GDK_AVAILABLE_IN_ALL
void gtk_cell_area_cell_set_valist (GtkCellArea *area,
GtkCellRenderer *renderer,
const gchar *first_property_name,
va_list var_args);
GDK_AVAILABLE_IN_ALL
void gtk_cell_area_cell_get_valist (GtkCellArea *area,
GtkCellRenderer *renderer,
const gchar *first_property_name,
va_list var_args);
GDK_AVAILABLE_IN_ALL
void gtk_cell_area_cell_set_property (GtkCellArea *area,
GtkCellRenderer *renderer,
const gchar *property_name,
const GValue *value);
GDK_AVAILABLE_IN_ALL
void gtk_cell_area_cell_get_property (GtkCellArea *area,
GtkCellRenderer *renderer,
const gchar *property_name,
GValue *value);
/* Focus */
GDK_AVAILABLE_IN_ALL
gboolean gtk_cell_area_is_activatable (GtkCellArea *area);
GDK_AVAILABLE_IN_ALL
gboolean gtk_cell_area_activate (GtkCellArea *area,
GtkCellAreaContext *context,
GtkWidget *widget,
const GdkRectangle *cell_area,
GtkCellRendererState flags,
gboolean edit_only);
GDK_AVAILABLE_IN_ALL
gboolean gtk_cell_area_focus (GtkCellArea *area,
GtkDirectionType direction);
GDK_AVAILABLE_IN_ALL
void gtk_cell_area_set_focus_cell (GtkCellArea *area,
GtkCellRenderer *renderer);
GDK_AVAILABLE_IN_ALL
GtkCellRenderer *gtk_cell_area_get_focus_cell (GtkCellArea *area);
/* Focus siblings */
GDK_AVAILABLE_IN_ALL
void gtk_cell_area_add_focus_sibling (GtkCellArea *area,
GtkCellRenderer *renderer,
GtkCellRenderer *sibling);
GDK_AVAILABLE_IN_ALL
void gtk_cell_area_remove_focus_sibling (GtkCellArea *area,
GtkCellRenderer *renderer,
GtkCellRenderer *sibling);
GDK_AVAILABLE_IN_ALL
gboolean gtk_cell_area_is_focus_sibling (GtkCellArea *area,
GtkCellRenderer *renderer,
GtkCellRenderer *sibling);
GDK_AVAILABLE_IN_ALL
const GList * gtk_cell_area_get_focus_siblings (GtkCellArea *area,
GtkCellRenderer *renderer);
GDK_AVAILABLE_IN_ALL
GtkCellRenderer *gtk_cell_area_get_focus_from_sibling (GtkCellArea *area,
GtkCellRenderer *renderer);
/* Cell Activation/Editing */
GDK_AVAILABLE_IN_ALL
GtkCellRenderer *gtk_cell_area_get_edited_cell (GtkCellArea *area);
GDK_AVAILABLE_IN_ALL
GtkCellEditable *gtk_cell_area_get_edit_widget (GtkCellArea *area);
GDK_AVAILABLE_IN_ALL
gboolean gtk_cell_area_activate_cell (GtkCellArea *area,
GtkWidget *widget,
GtkCellRenderer *renderer,
GdkEvent *event,
const GdkRectangle *cell_area,
GtkCellRendererState flags);
GDK_AVAILABLE_IN_ALL
void gtk_cell_area_stop_editing (GtkCellArea *area,
gboolean canceled);
/* Functions for area implementations */
/* Distinguish the inner cell area from the whole requested area including margins */
GDK_AVAILABLE_IN_ALL
void gtk_cell_area_inner_cell_area (GtkCellArea *area,
GtkWidget *widget,
const GdkRectangle *cell_area,
GdkRectangle *inner_area);
/* Request the size of a cell while respecting the cell margins (requests are margin inclusive) */
GDK_AVAILABLE_IN_ALL
void gtk_cell_area_request_renderer (GtkCellArea *area,
GtkCellRenderer *renderer,
GtkOrientation orientation,
GtkWidget *widget,
gint for_size,
gint *minimum_size,
gint *natural_size);
/* For api stability, this is called from gtkcelllayout.c in order to ensure the correct
* object is passed to the user function in gtk_cell_layout_set_cell_data_func.
*
* This private api takes gpointer & GFunc arguments to circumvent circular header file
* dependancies.
*/
void _gtk_cell_area_set_cell_data_func_with_proxy (GtkCellArea *area,
GtkCellRenderer *cell,
GFunc func,
gpointer func_data,
GDestroyNotify destroy,
gpointer proxy);
G_END_DECLS
#endif /* __GTK_CELL_AREA_H__ */
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