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gnome-shell/src/st/st-drawing-area.h

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Move ShellDrawingArea to StDrawingArea It's nicer to have ShellDrawingArea as a St widget so it can participate more cleanly in CSS styling, such as queuing a redraw automatically on style changes, and allowing subclasses to use CSS styling. https://bugzilla.gnome.org/show_bug.cgi?id=602131
2009-11-14 21:39:22 +00:00
/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */
Fix up copyright and license notices for St * Make sure all source files have a LGPL copyright header, and standardize non-standard variations of the header to a common form. * Check and update all copyright notices. * Remove 'Written By:' lines. They are universally incomplete and typically indicate only who started a particular file. https://bugzilla.gnome.org/show_bug.cgi?id=634550
2010-11-10 22:00:45 +00:00
/*
* st-drawing-area.h: A dynamically-sized Cairo drawing area
*
* Copyright 2009, 2010 Red Hat, Inc.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation, either version 2.1 of
* the License, or (at your option) any later version.
*
* This program is distributed in the hope it will be useful, but WITHOUT ANY
* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
* FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for
* more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
Move ShellDrawingArea to StDrawingArea It's nicer to have ShellDrawingArea as a St widget so it can participate more cleanly in CSS styling, such as queuing a redraw automatically on style changes, and allowing subclasses to use CSS styling. https://bugzilla.gnome.org/show_bug.cgi?id=602131
2009-11-14 21:39:22 +00:00
#ifndef __ST_DRAWING_AREA_H__
#define __ST_DRAWING_AREA_H__
Rework StDrawingArea not to use ClutterCairoTexture Having StDrawingArea use ClutterCairoTexture causes circularity problems with sizing - StDrawingArea wants to use its allocation for the size of the texture, but ClutterTexture wants to use the size of the texture to determine the requited size. Avoid this by making StDrawingArea directly use Cairo and CoglTexture; while doing this, the API is changed a bit for simplicity and to match our use case: - Instead of clutter_cairo_texture_create(), we have st_drawing_area_get_context() to retrieve an already created context. This can only be called in the ::repaint signal. - The ::redraw signal is changed to ::repaint so we can have st_drawing_area_queue_repaint() that doesn't collide with clutter_actor_queue_redraw() - ::repaint is now emitted lazily when painting the actor rather than synchronously at various different points. https://bugzilla.gnome.org/show_bug.cgi?id=611750
2010-03-03 23:00:05 +00:00
#include "st-widget.h"
#include <cairo.h>
Move ShellDrawingArea to StDrawingArea It's nicer to have ShellDrawingArea as a St widget so it can participate more cleanly in CSS styling, such as queuing a redraw automatically on style changes, and allowing subclasses to use CSS styling. https://bugzilla.gnome.org/show_bug.cgi?id=602131
2009-11-14 21:39:22 +00:00
st: Use G_DECLARE_*_TYPE Cut down on boilerplate by using the (no longer that) new helper macros. We don't care about breaking ABI in private libraries, so use G_DECLARE_FINAL_TYPE even where the class struct used to be exposed in the header, except for types we inherit from ourselves (obviously) or where the class exposes any vfuncs (where changes could affect inheritance in extensions).
2015-09-24 14:08:13 +00:00
#define ST_TYPE_DRAWING_AREA (st_drawing_area_get_type ())
G_DECLARE_DERIVABLE_TYPE (StDrawingArea, st_drawing_area,
ST, DRAWING_AREA, StWidget)
Move ShellDrawingArea to StDrawingArea It's nicer to have ShellDrawingArea as a St widget so it can participate more cleanly in CSS styling, such as queuing a redraw automatically on style changes, and allowing subclasses to use CSS styling. https://bugzilla.gnome.org/show_bug.cgi?id=602131
2009-11-14 21:39:22 +00:00
struct _StDrawingAreaClass
{
Rework StDrawingArea not to use ClutterCairoTexture Having StDrawingArea use ClutterCairoTexture causes circularity problems with sizing - StDrawingArea wants to use its allocation for the size of the texture, but ClutterTexture wants to use the size of the texture to determine the requited size. Avoid this by making StDrawingArea directly use Cairo and CoglTexture; while doing this, the API is changed a bit for simplicity and to match our use case: - Instead of clutter_cairo_texture_create(), we have st_drawing_area_get_context() to retrieve an already created context. This can only be called in the ::repaint signal. - The ::redraw signal is changed to ::repaint so we can have st_drawing_area_queue_repaint() that doesn't collide with clutter_actor_queue_redraw() - ::repaint is now emitted lazily when painting the actor rather than synchronously at various different points. https://bugzilla.gnome.org/show_bug.cgi?id=611750
2010-03-03 23:00:05 +00:00
StWidgetClass parent_class;
Move ShellDrawingArea to StDrawingArea It's nicer to have ShellDrawingArea as a St widget so it can participate more cleanly in CSS styling, such as queuing a redraw automatically on style changes, and allowing subclasses to use CSS styling. https://bugzilla.gnome.org/show_bug.cgi?id=602131
2009-11-14 21:39:22 +00:00
Rework StDrawingArea not to use ClutterCairoTexture Having StDrawingArea use ClutterCairoTexture causes circularity problems with sizing - StDrawingArea wants to use its allocation for the size of the texture, but ClutterTexture wants to use the size of the texture to determine the requited size. Avoid this by making StDrawingArea directly use Cairo and CoglTexture; while doing this, the API is changed a bit for simplicity and to match our use case: - Instead of clutter_cairo_texture_create(), we have st_drawing_area_get_context() to retrieve an already created context. This can only be called in the ::repaint signal. - The ::redraw signal is changed to ::repaint so we can have st_drawing_area_queue_repaint() that doesn't collide with clutter_actor_queue_redraw() - ::repaint is now emitted lazily when painting the actor rather than synchronously at various different points. https://bugzilla.gnome.org/show_bug.cgi?id=611750
2010-03-03 23:00:05 +00:00
void (*repaint) (StDrawingArea *area);
Move ShellDrawingArea to StDrawingArea It's nicer to have ShellDrawingArea as a St widget so it can participate more cleanly in CSS styling, such as queuing a redraw automatically on style changes, and allowing subclasses to use CSS styling. https://bugzilla.gnome.org/show_bug.cgi?id=602131
2009-11-14 21:39:22 +00:00
};
Rework StDrawingArea not to use ClutterCairoTexture Having StDrawingArea use ClutterCairoTexture causes circularity problems with sizing - StDrawingArea wants to use its allocation for the size of the texture, but ClutterTexture wants to use the size of the texture to determine the requited size. Avoid this by making StDrawingArea directly use Cairo and CoglTexture; while doing this, the API is changed a bit for simplicity and to match our use case: - Instead of clutter_cairo_texture_create(), we have st_drawing_area_get_context() to retrieve an already created context. This can only be called in the ::repaint signal. - The ::redraw signal is changed to ::repaint so we can have st_drawing_area_queue_repaint() that doesn't collide with clutter_actor_queue_redraw() - ::repaint is now emitted lazily when painting the actor rather than synchronously at various different points. https://bugzilla.gnome.org/show_bug.cgi?id=611750
2010-03-03 23:00:05 +00:00
void st_drawing_area_queue_repaint (StDrawingArea *area);
cairo_t *st_drawing_area_get_context (StDrawingArea *area);
void st_drawing_area_get_surface_size (StDrawingArea *area,
guint *width,
guint *height);
Move ShellDrawingArea to StDrawingArea It's nicer to have ShellDrawingArea as a St widget so it can participate more cleanly in CSS styling, such as queuing a redraw automatically on style changes, and allowing subclasses to use CSS styling. https://bugzilla.gnome.org/show_bug.cgi?id=602131
2009-11-14 21:39:22 +00:00
#endif /* __ST_DRAWING_AREA_H__ */
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