forked from AuroraMiddleware/gtk
34f4b5c190
This allows us to reduce code allocation code paths in subclasses, as a result GtkCellArea implements the ->render() vfunc and the subclass only decides the cell area and background area distributions in a single code path.
456 lines
23 KiB
C
456 lines
23 KiB
C
/* gtkcellarea.h
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*
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* Copyright (C) 2010 Openismus GmbH
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*
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* Authors:
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* Tristan Van Berkom <tristanvb@openismus.com>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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#if !defined (__GTK_H_INSIDE__) && !defined (GTK_COMPILATION)
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#error "Only <gtk/gtk.h> can be included directly."
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#endif
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#ifndef __GTK_CELL_AREA_H__
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#define __GTK_CELL_AREA_H__
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#include <gtk/gtkcellrenderer.h>
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#include <gtk/gtkwidget.h>
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#include <gtk/gtktreemodel.h>
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G_BEGIN_DECLS
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#define GTK_TYPE_CELL_AREA (gtk_cell_area_get_type ())
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#define GTK_CELL_AREA(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), GTK_TYPE_CELL_AREA, GtkCellArea))
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#define GTK_CELL_AREA_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), GTK_TYPE_CELL_AREA, GtkCellAreaClass))
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#define GTK_IS_CELL_AREA(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GTK_TYPE_CELL_AREA))
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#define GTK_IS_CELL_AREA_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), GTK_TYPE_CELL_AREA))
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#define GTK_CELL_AREA_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), GTK_TYPE_CELL_AREA, GtkCellAreaClass))
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typedef struct _GtkCellArea GtkCellArea;
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typedef struct _GtkCellAreaClass GtkCellAreaClass;
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typedef struct _GtkCellAreaPrivate GtkCellAreaPrivate;
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typedef struct _GtkCellAreaContext GtkCellAreaContext;
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/**
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* GTK_CELL_AREA_WARN_INVALID_CELL_PROPERTY_ID:
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* @object: the #GObject on which set_cell_property() or get_get_property()
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* was called
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* @property_id: the numeric id of the property
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* @pspec: the #GParamSpec of the property
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*
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* This macro should be used to emit a standard warning about unexpected
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* properties in set_cell_property() and get_cell_property() implementations.
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*/
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#define GTK_CELL_AREA_WARN_INVALID_CELL_PROPERTY_ID(object, property_id, pspec) \
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G_OBJECT_WARN_INVALID_PSPEC ((object), "cell property id", (property_id), (pspec))
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/**
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* GtkCellCallback:
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* @renderer: the cell renderer to operate on
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* @data: user-supplied data
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*
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* The type of the callback functions used for iterating over
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* the cell renderers of a #GtkCellArea, see gtk_cell_area_foreach().
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*
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* Return value: %TRUE to stop iterating over cells.
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*/
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typedef gboolean (*GtkCellCallback) (GtkCellRenderer *renderer,
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gpointer data);
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/**
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* GtkCellAllocCallback:
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* @renderer: the cell renderer to operate on
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* @cell_area: the area allocated to @renderer inside the rectangle provided to gtk_cell_area_foreach_alloc().
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* @cell_background: the background area for @renderer inside the background
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* area provided to gtk_cell_area_foreach_alloc().
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* @data: user-supplied data
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*
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* The type of the callback functions used for iterating over
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* the cell renderers and their allocated areas inside a #GtkCellArea,
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* see gtk_cell_area_foreach_alloc().
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*
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* Return value: %TRUE to stop iterating over cells.
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*/
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typedef gboolean (*GtkCellAllocCallback) (GtkCellRenderer *renderer,
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const GdkRectangle *cell_area,
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const GdkRectangle *cell_background,
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gpointer data);
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struct _GtkCellArea
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{
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/*< private >*/
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GInitiallyUnowned parent_instance;
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GtkCellAreaPrivate *priv;
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};
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/**
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* GtkCellAreaClass:
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* @add: adds a #GtkCellRenderer to the area.
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* @remove: removes a #GtkCellRenderer from the area.
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* @foreach: Calls the #GtkCellCallback function on every #GtkCellRenderer in the area
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* with the provided user data until the callback returns %TRUE.
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* @foreach_alloc: Calls the #GtkCellAllocCallback function on every #GtkCellRenderer in the area
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* with the allocated area for the cell and the provided user data until the callback returns %TRUE.
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* @event: Handle an event in the area, this is generally used to activate a cell
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* at the event location for button events but can also be used to generically pass
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* events to #GtkWidgets drawn onto the area.
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* @render: Actually render the area's cells to the specified rectangle, @background_area
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* should be correctly distributed to the cells coresponding background areas.
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* @apply_attributes: Apply the cell attributes to the cells. This is implemented as a signal and
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* generally #GtkCellArea subclasses dont need to implement this since it's handled by the base
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* class but can be overridden to apply some custom attributes.
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* @create_context: Creates and returns a class specific #GtkCellAreaContext to store cell
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* alignment and allocation details for a said #GtkCellArea class.
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* @get_request_mode: This allows an area to tell its layouting widget whether it prefers to
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* be allocated in %GTK_SIZE_REQUEST_HEIGHT_FOR_WIDTH or %GTK_SIZE_REQUEST_WIDTH_FOR_HEIGHT mode.
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* @get_preferred_width: Calculates the minimum and natural width of the area's cells
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* with the current attributes applied while considering the particular layouting details
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* of the said #GtkCellArea. While requests are performed over a series of rows, alignments
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* and overall minimum and natural sizes should be stored in the corresponding #GtkCellAreaContext.
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* @get_preferred_height_for_width: Calculates the minimum and natural height for the area
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* if the passed @context would be allocated the given width. When implementing this virtual
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* method it is safe to assume that @context has already stored the aligned cell widths
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* for every #GtkTreeModel row that @context will be allocated for since this information
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* was stored at #GtkCellAreaClass.get_preferred_width() time. This virtual method should
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* also store any necessary alignments of cell heights for the case that the context is
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* allocated a height.
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* @get_preferred_height: Calculates the minimum and natural height of the area's cells
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* with the current attributes applied. Essentially this is the same as
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* #GtkCellAreaClass.get_preferred_width() only for areas that are being requested as
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* %GTK_SIZE_REQUEST_WIDTH_FOR_HEIGHT.
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* @get_preferred_width_for_height: Calculates the minimum and natural width for the area
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* if the passed @context would be allocated the given height. The same as
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* #GtkCellAreaClass.get_preferred_height_for_width() only for handling requests in the
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* %GTK_SIZE_REQUEST_WIDTH_FOR_HEIGHT mode.
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* @set_cell_property: This should be implemented to handle changes in child cell properties
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* for a given #GtkCellRenderer that were previously installed on the #GtkCellAreaClass with
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* gtk_cell_area_class_install_cell_property().
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* @get_cell_property: This should be implemented to report the values of child cell properties
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* for a given child #GtkCellRenderer.
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* @focus: This virtual method should be implemented to navigate focus from cell to cell
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* inside the #GtkCellArea. The #GtkCellArea should move focus from cell to cell inside
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* the area and return %FALSE if focus logically leaves the area with the following exceptions:
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* When the area contains no activatable cells, the entire area recieves focus. Focus should not
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* be given to cells that are actually "focus siblings" of other sibling cells
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* (see gtk_cell_area_get_focus_from_sibling()). Focus is set by calling gtk_cell_area_set_focus_cell().
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* @is_activatable: Returns whether the #GtkCellArea can respond to #GtkCellAreaClass.activate(),
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* usually this does not need to be implemented since the base class takes care of this however
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* it can be enhanced if the #GtkCellArea subclass can handle activation in other ways than
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* activating its #GtkCellRenderers.
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* @activate: This is called when the layouting widget rendering the #GtkCellArea activates
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* the focus cell (see gtk_cell_area_get_focus_cell()).
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*/
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struct _GtkCellAreaClass
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{
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/*< private >*/
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GInitiallyUnownedClass parent_class;
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/*< public >*/
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/* Basic methods */
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void (* add) (GtkCellArea *area,
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GtkCellRenderer *renderer);
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void (* remove) (GtkCellArea *area,
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GtkCellRenderer *renderer);
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void (* foreach) (GtkCellArea *area,
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GtkCellCallback callback,
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gpointer callback_data);
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void (* foreach_alloc) (GtkCellArea *area,
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GtkCellAreaContext *context,
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GtkWidget *widget,
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const GdkRectangle *cell_area,
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const GdkRectangle *background_area,
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GtkCellAllocCallback callback,
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gpointer callback_data);
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gint (* event) (GtkCellArea *area,
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GtkCellAreaContext *context,
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GtkWidget *widget,
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GdkEvent *event,
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const GdkRectangle *cell_area,
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GtkCellRendererState flags);
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void (* render) (GtkCellArea *area,
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GtkCellAreaContext *context,
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GtkWidget *widget,
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cairo_t *cr,
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const GdkRectangle *background_area,
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const GdkRectangle *cell_area,
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GtkCellRendererState flags,
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gboolean paint_focus);
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void (* apply_attributes) (GtkCellArea *area,
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GtkTreeModel *tree_model,
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GtkTreeIter *iter,
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gboolean is_expander,
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gboolean is_expanded);
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/* Geometry */
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GtkCellAreaContext *(* create_context) (GtkCellArea *area);
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GtkSizeRequestMode (* get_request_mode) (GtkCellArea *area);
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void (* get_preferred_width) (GtkCellArea *area,
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GtkCellAreaContext *context,
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GtkWidget *widget,
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gint *minimum_width,
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gint *natural_width);
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void (* get_preferred_height_for_width) (GtkCellArea *area,
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GtkCellAreaContext *context,
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GtkWidget *widget,
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gint width,
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gint *minimum_height,
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gint *natural_height);
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void (* get_preferred_height) (GtkCellArea *area,
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GtkCellAreaContext *context,
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GtkWidget *widget,
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gint *minimum_height,
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gint *natural_height);
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void (* get_preferred_width_for_height) (GtkCellArea *area,
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GtkCellAreaContext *context,
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GtkWidget *widget,
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gint height,
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gint *minimum_width,
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gint *natural_width);
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/* Cell Properties */
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void (* set_cell_property) (GtkCellArea *area,
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GtkCellRenderer *renderer,
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guint property_id,
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const GValue *value,
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GParamSpec *pspec);
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void (* get_cell_property) (GtkCellArea *area,
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GtkCellRenderer *renderer,
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guint property_id,
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GValue *value,
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GParamSpec *pspec);
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/* Focus */
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gboolean (* focus) (GtkCellArea *area,
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GtkDirectionType direction);
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gboolean (* is_activatable) (GtkCellArea *area);
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gboolean (* activate) (GtkCellArea *area,
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GtkCellAreaContext *context,
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GtkWidget *widget,
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const GdkRectangle *cell_area,
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GtkCellRendererState flags);
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/*< private >*/
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/* Padding for future expansion */
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void (*_gtk_reserved1) (void);
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void (*_gtk_reserved2) (void);
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void (*_gtk_reserved3) (void);
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void (*_gtk_reserved4) (void);
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void (*_gtk_reserved5) (void);
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void (*_gtk_reserved6) (void);
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void (*_gtk_reserved7) (void);
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void (*_gtk_reserved8) (void);
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};
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GType gtk_cell_area_get_type (void) G_GNUC_CONST;
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/* Basic methods */
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void gtk_cell_area_add (GtkCellArea *area,
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GtkCellRenderer *renderer);
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void gtk_cell_area_remove (GtkCellArea *area,
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GtkCellRenderer *renderer);
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gboolean gtk_cell_area_has_renderer (GtkCellArea *area,
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GtkCellRenderer *renderer);
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void gtk_cell_area_foreach (GtkCellArea *area,
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GtkCellCallback callback,
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gpointer callback_data);
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void gtk_cell_area_foreach_alloc (GtkCellArea *area,
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GtkCellAreaContext *context,
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GtkWidget *widget,
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const GdkRectangle *cell_area,
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const GdkRectangle *background_area,
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GtkCellAllocCallback callback,
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gpointer callback_data);
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gint gtk_cell_area_event (GtkCellArea *area,
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GtkCellAreaContext *context,
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GtkWidget *widget,
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GdkEvent *event,
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const GdkRectangle *cell_area,
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GtkCellRendererState flags);
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void gtk_cell_area_render (GtkCellArea *area,
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GtkCellAreaContext *context,
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GtkWidget *widget,
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cairo_t *cr,
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const GdkRectangle *background_area,
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const GdkRectangle *cell_area,
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GtkCellRendererState flags,
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gboolean paint_focus);
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void gtk_cell_area_set_style_detail (GtkCellArea *area,
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const gchar *detail);
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G_CONST_RETURN gchar *gtk_cell_area_get_style_detail (GtkCellArea *area);
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void gtk_cell_area_get_cell_allocation (GtkCellArea *area,
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GtkCellAreaContext *context,
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GtkWidget *widget,
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GtkCellRenderer *renderer,
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const GdkRectangle *cell_area,
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GdkRectangle *allocation);
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GtkCellRenderer *gtk_cell_area_get_cell_at_position (GtkCellArea *area,
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GtkCellAreaContext *context,
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GtkWidget *widget,
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const GdkRectangle *cell_area,
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gint x,
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gint y,
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GdkRectangle *alloc_area);
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/* Geometry */
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GtkCellAreaContext *gtk_cell_area_create_context (GtkCellArea *area);
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GtkSizeRequestMode gtk_cell_area_get_request_mode (GtkCellArea *area);
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void gtk_cell_area_get_preferred_width (GtkCellArea *area,
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GtkCellAreaContext *context,
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GtkWidget *widget,
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gint *minimum_size,
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gint *natural_size);
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void gtk_cell_area_get_preferred_height_for_width (GtkCellArea *area,
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GtkCellAreaContext *context,
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GtkWidget *widget,
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gint width,
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gint *minimum_height,
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gint *natural_height);
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void gtk_cell_area_get_preferred_height (GtkCellArea *area,
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GtkCellAreaContext *context,
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GtkWidget *widget,
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gint *minimum_size,
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gint *natural_size);
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void gtk_cell_area_get_preferred_width_for_height (GtkCellArea *area,
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GtkCellAreaContext *context,
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GtkWidget *widget,
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gint height,
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gint *minimum_width,
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gint *natural_width);
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G_CONST_RETURN gchar *gtk_cell_area_get_current_path_string (GtkCellArea *area);
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/* Attributes */
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void gtk_cell_area_apply_attributes (GtkCellArea *area,
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GtkTreeModel *tree_model,
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GtkTreeIter *iter,
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gboolean is_expander,
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gboolean is_expanded);
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void gtk_cell_area_attribute_connect (GtkCellArea *area,
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GtkCellRenderer *renderer,
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const gchar *attribute,
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gint column);
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void gtk_cell_area_attribute_disconnect (GtkCellArea *area,
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GtkCellRenderer *renderer,
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const gchar *attribute);
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/* Cell Properties */
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void gtk_cell_area_class_install_cell_property (GtkCellAreaClass *aclass,
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guint property_id,
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GParamSpec *pspec);
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GParamSpec* gtk_cell_area_class_find_cell_property (GtkCellAreaClass *aclass,
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const gchar *property_name);
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GParamSpec** gtk_cell_area_class_list_cell_properties (GtkCellAreaClass *aclass,
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guint *n_properties);
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void gtk_cell_area_add_with_properties (GtkCellArea *area,
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GtkCellRenderer *renderer,
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const gchar *first_prop_name,
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...) G_GNUC_NULL_TERMINATED;
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void gtk_cell_area_cell_set (GtkCellArea *area,
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GtkCellRenderer *renderer,
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const gchar *first_prop_name,
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...) G_GNUC_NULL_TERMINATED;
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void gtk_cell_area_cell_get (GtkCellArea *area,
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GtkCellRenderer *renderer,
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const gchar *first_prop_name,
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...) G_GNUC_NULL_TERMINATED;
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void gtk_cell_area_cell_set_valist (GtkCellArea *area,
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GtkCellRenderer *renderer,
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const gchar *first_property_name,
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va_list var_args);
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void gtk_cell_area_cell_get_valist (GtkCellArea *area,
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GtkCellRenderer *renderer,
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const gchar *first_property_name,
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va_list var_args);
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void gtk_cell_area_cell_set_property (GtkCellArea *area,
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GtkCellRenderer *renderer,
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const gchar *property_name,
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const GValue *value);
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void gtk_cell_area_cell_get_property (GtkCellArea *area,
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GtkCellRenderer *renderer,
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const gchar *property_name,
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GValue *value);
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/* Focus */
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gboolean gtk_cell_area_is_activatable (GtkCellArea *area);
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gboolean gtk_cell_area_activate (GtkCellArea *area,
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GtkCellAreaContext *context,
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GtkWidget *widget,
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const GdkRectangle *cell_area,
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GtkCellRendererState flags);
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gboolean gtk_cell_area_focus (GtkCellArea *area,
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GtkDirectionType direction);
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void gtk_cell_area_set_focus_cell (GtkCellArea *area,
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GtkCellRenderer *renderer);
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GtkCellRenderer *gtk_cell_area_get_focus_cell (GtkCellArea *area);
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/* Focus siblings */
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void gtk_cell_area_add_focus_sibling (GtkCellArea *area,
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GtkCellRenderer *renderer,
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GtkCellRenderer *sibling);
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void gtk_cell_area_remove_focus_sibling (GtkCellArea *area,
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GtkCellRenderer *renderer,
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GtkCellRenderer *sibling);
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gboolean gtk_cell_area_is_focus_sibling (GtkCellArea *area,
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GtkCellRenderer *renderer,
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GtkCellRenderer *sibling);
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G_CONST_RETURN GList *gtk_cell_area_get_focus_siblings (GtkCellArea *area,
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GtkCellRenderer *renderer);
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GtkCellRenderer *gtk_cell_area_get_focus_from_sibling (GtkCellArea *area,
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GtkCellRenderer *renderer);
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/* Cell Activation/Editing */
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GtkCellRenderer *gtk_cell_area_get_edited_cell (GtkCellArea *area);
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GtkCellEditable *gtk_cell_area_get_edit_widget (GtkCellArea *area);
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gboolean gtk_cell_area_activate_cell (GtkCellArea *area,
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GtkWidget *widget,
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GtkCellRenderer *renderer,
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GdkEvent *event,
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const GdkRectangle *cell_area,
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GtkCellRendererState flags);
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void gtk_cell_area_stop_editing (GtkCellArea *area,
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gboolean canceled);
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/* Functions for area implementations */
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/* Distinguish the inner cell area from the whole requested area including margins */
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void gtk_cell_area_inner_cell_area (GtkCellArea *area,
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GtkWidget *widget,
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const GdkRectangle *cell_area,
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GdkRectangle *inner_area);
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/* Request the size of a cell while respecting the cell margins (requests are margin inclusive) */
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void gtk_cell_area_request_renderer (GtkCellArea *area,
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GtkCellRenderer *renderer,
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GtkOrientation orientation,
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GtkWidget *widget,
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gint for_size,
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gint *minimum_size,
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gint *natural_size);
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G_END_DECLS
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#endif /* __GTK_CELL_AREA_H__ */
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