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Move ShellDrawingArea to StDrawingArea

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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
This commit is contained in:
Colin Walters 2009-11-14 16:39:22 -05:00
parent b0cb8fb85a
commit f815844eb4
10 changed files with 168 additions and 246 deletions
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2
js/ui/altTab.js
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@ -686,7 +686,7 @@ AppSwitcher.prototype = {
appIcon.actor.reactive = false;
let n = this._arrows.length;
let arrow = new Shell.DrawingArea();
let arrow = new St.DrawingArea();
arrow.connect('redraw', Lang.bind(this,
function (area, texture) {
Shell.draw_box_pointer(texture, Shell.PointerDirection.DOWN,

2
js/ui/appIcon.js
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@ -307,7 +307,7 @@ AppIconMenu.prototype = {
this._windowContainer.connect('leave-event', Lang.bind(this, this._onMenuLeave));
this._windowContainer.connect('button-release-event', Lang.bind(this, this._onMenuButtonRelease));
this._arrow = new Shell.DrawingArea();
this._arrow = new St.DrawingArea();
this._arrow.connect('redraw', Lang.bind(this, function (area, texture) {
Shell.draw_box_pointer(texture,
this._type == MenuType.ON_RIGHT ? Shell.PointerDirection.LEFT : Shell.PointerDirection.UP,

2
src/Makefile-st.am
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@ -73,6 +73,7 @@ st_source_h = \
st/st-box-layout-child.h \
st/st-button.h \
st/st-clipboard.h \
st/st-drawing-area.h \
st/st-entry.h \
st/st-im-text.h \
st/st-label.h \
@ -109,6 +110,7 @@ st_source_c = \
st/st-box-layout-child.c \
st/st-button.c \
st/st-clipboard.c \
st/st-drawing-area.c \
st/st-entry.c \
st/st-im-text.c \
st/st-label.c \

2
src/Makefile.am
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@ -67,8 +67,6 @@ libgnome_shell_la_SOURCES = \
shell-button-box.h \
shell-drawing.c \
shell-drawing.h \
shell-drawing-area.c \
shell-drawing-area.h \
shell-embedded-window.c \
shell-embedded-window.h \
shell-embedded-window-private.h \

102
src/shell-drawing-area.c
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@ -1,102 +0,0 @@
/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */
/**
* SECTION:shell-drawing-area
* @short_description: A dynamically-sized Cairo drawing area
*
* #ShellDrawingArea is similar to #ClutterCairoTexture in that
* it allows drawing via Cairo; the primary difference is that
* it is dynamically sized. To use, connect to the @redraw
* signal, and inside the signal handler, call
* clutter_cairo_texture_create() to begin drawing.
*/
#include "shell-drawing-area.h"
#include <clutter/clutter.h>
#include <gtk/gtk.h>
#include <cairo.h>
G_DEFINE_TYPE(ShellDrawingArea, shell_drawing_area, CLUTTER_TYPE_GROUP);
struct _ShellDrawingAreaPrivate {
ClutterCairoTexture *texture;
};
/* Signals */
enum
{
REDRAW,
LAST_SIGNAL
};
static guint shell_drawing_area_signals [LAST_SIGNAL] = { 0 };
static void
shell_drawing_area_allocate (ClutterActor *self,
const ClutterActorBox *box,
ClutterAllocationFlags flags)
{
ShellDrawingArea *area = SHELL_DRAWING_AREA (self);
int width = box->x2 - box->x1;
int height = box->y2 - box->y1;
ClutterActorBox child_box;
/* Chain up directly to ClutterActor to set actor->allocation. We explicitly skip our parent class
* ClutterGroup here because we want to override the allocate function. */
(CLUTTER_ACTOR_CLASS (g_type_class_peek (clutter_actor_get_type ())))->allocate (self, box, flags);
child_box.x1 = 0;
child_box.x2 = width;
child_box.y1 = 0;
child_box.y2 = height;
clutter_actor_allocate (CLUTTER_ACTOR (area->priv->texture), &child_box, flags);
if (width > 0 && height > 0)
{
clutter_cairo_texture_set_surface_size (area->priv->texture,
width, height);
g_signal_emit (G_OBJECT (self), shell_drawing_area_signals[REDRAW], 0,
area->priv->texture);
}
}
static void
shell_drawing_area_class_init (ShellDrawingAreaClass *klass)
{
GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
ClutterActorClass *actor_class = CLUTTER_ACTOR_CLASS (klass);
actor_class->allocate = shell_drawing_area_allocate;
shell_drawing_area_signals[REDRAW] =
g_signal_new ("redraw",
G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (ShellDrawingAreaClass, redraw),
NULL, NULL,
g_cclosure_marshal_VOID__OBJECT,
G_TYPE_NONE, 1, G_TYPE_OBJECT);
g_type_class_add_private (gobject_class, sizeof (ShellDrawingAreaPrivate));
}
static void
shell_drawing_area_init (ShellDrawingArea *area)
{
area->priv = G_TYPE_INSTANCE_GET_PRIVATE (area, SHELL_TYPE_DRAWING_AREA,
ShellDrawingAreaPrivate);
area->priv->texture = CLUTTER_CAIRO_TEXTURE (clutter_cairo_texture_new (1, 1));
clutter_container_add_actor (CLUTTER_CONTAINER (area), CLUTTER_ACTOR (area->priv->texture));
}
/**
* shell_drawing_area_get_texture:
*
* Return Value: (transfer none):
*/
ClutterCairoTexture *
shell_drawing_area_get_texture (ShellDrawingArea *area)
{
return area->priv->texture;
}

38
src/shell-drawing-area.h
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@ -1,38 +0,0 @@
/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */
#ifndef __SHELL_DRAWING_AREA_H__
#define __SHELL_DRAWING_AREA_H__
#include <clutter/clutter.h>
#include <gtk/gtk.h>
#define SHELL_TYPE_DRAWING_AREA (shell_drawing_area_get_type ())
#define SHELL_DRAWING_AREA(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), SHELL_TYPE_DRAWING_AREA, ShellDrawingArea))
#define SHELL_DRAWING_AREA_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), SHELL_TYPE_DRAWING_AREA, ShellDrawingAreaClass))
#define SHELL_IS_DRAWING_AREA(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), SHELL_TYPE_DRAWING_AREA))
#define SHELL_IS_DRAWING_AREA_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), SHELL_TYPE_DRAWING_AREA))
#define SHELL_DRAWING_AREA_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), SHELL_TYPE_DRAWING_AREA, ShellDrawingAreaClass))
typedef struct _ShellDrawingArea ShellDrawingArea;
typedef struct _ShellDrawingAreaClass ShellDrawingAreaClass;
typedef struct _ShellDrawingAreaPrivate ShellDrawingAreaPrivate;
struct _ShellDrawingArea
{
ClutterGroup parent;
ShellDrawingAreaPrivate *priv;
};
struct _ShellDrawingAreaClass
{
ClutterGroupClass parent_class;
void (*redraw) (ShellDrawingArea *area, ClutterCairoTexture *texture);
};
GType shell_drawing_area_get_type (void) G_GNUC_CONST;
ClutterCairoTexture *shell_drawing_area_get_texture (ShellDrawingArea *area);
#endif /* __SHELL_DRAWING_AREA_H__ */

96
src/shell-drawing.c
View File

@ -3,102 +3,6 @@
#include "shell-drawing.h"
#include <math.h>
/**
* shell_create_vertical_gradient:
* @top: the color at the top
* @bottom: the color at the bottom
*
* Creates a vertical gradient actor.
*
* Return value: (transfer none): a #ClutterCairoTexture actor with the
* gradient. The texture actor is floating, hence (transfer none).
*/
ClutterCairoTexture *
shell_create_vertical_gradient (ClutterColor *top,
ClutterColor *bottom)
{
ClutterCairoTexture *texture;
cairo_t *cr;
cairo_pattern_t *pattern;
/* Draw the gradient on an 8x8 pixel texture. Because the gradient is drawn
* from the uppermost to the lowermost row, after stretching 1/16 of the
* texture height has the top color and 1/16 has the bottom color. The 8
* pixel width is chosen for reasons related to graphics hardware internals.
*/
texture = CLUTTER_CAIRO_TEXTURE (clutter_cairo_texture_new (8, 8));
cr = clutter_cairo_texture_create (texture);
pattern = cairo_pattern_create_linear (0, 0, 0, 8);
cairo_pattern_add_color_stop_rgba (pattern, 0,
top->red / 255.,
top->green / 255.,
top->blue / 255.,
top->alpha / 255.);
cairo_pattern_add_color_stop_rgba (pattern, 1,
bottom->red / 255.,
bottom->green / 255.,
bottom->blue / 255.,
bottom->alpha / 255.);
cairo_set_source (cr, pattern);
cairo_paint (cr);
cairo_pattern_destroy (pattern);
cairo_destroy (cr);
return texture;
}
/**
* shell_create_horizontal_gradient:
* @left: the color on the left
* @right: the color on the right
*
* Creates a horizontal gradient actor.
*
* Return value: (transfer none): a #ClutterCairoTexture actor with the
* gradient. The texture actor is floating, hence (transfer none).
*/
ClutterCairoTexture *
shell_create_horizontal_gradient (ClutterColor *left,
ClutterColor *right)
{
ClutterCairoTexture *texture;
cairo_t *cr;
cairo_pattern_t *pattern;
/* Draw the gradient on an 8x1 pixel texture. Because the gradient is drawn
* from the left to the right column, after stretching 1/16 of the
* texture width has the left side color and 1/16 has the right side color.
* There is no reason to use the 8 pixel height that would be similar to the
* reason we are using the 8 pixel width for the vertical gradient, so we
* are just using the 1 pixel height instead.
*/
texture = CLUTTER_CAIRO_TEXTURE (clutter_cairo_texture_new (8, 1));
cr = clutter_cairo_texture_create (texture);
pattern = cairo_pattern_create_linear (0, 0, 8, 0);
cairo_pattern_add_color_stop_rgba (pattern, 0,
left->red / 255.,
left->green / 255.,
left->blue / 255.,
left->alpha / 255.);
cairo_pattern_add_color_stop_rgba (pattern, 1,
right->red / 255.,
right->green / 255.,
right->blue / 255.,
right->alpha / 255.);
cairo_set_source (cr, pattern);
cairo_paint (cr);
cairo_pattern_destroy (pattern);
cairo_destroy (cr);
return texture;
}
void
shell_draw_clock (ClutterCairoTexture *texture,
int hour,

6
src/shell-drawing.h
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@ -7,12 +7,6 @@
G_BEGIN_DECLS
ClutterCairoTexture *shell_create_vertical_gradient (ClutterColor *top,
ClutterColor *bottom);
ClutterCairoTexture *shell_create_horizontal_gradient (ClutterColor *left,
ClutterColor *right);
typedef enum {
SHELL_POINTER_UP,
SHELL_POINTER_DOWN,

125
src/st/st-drawing-area.c Normal file
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@ -0,0 +1,125 @@
/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */
/**
* SECTION:st-drawing-area
* @short_description: A dynamically-sized Cairo drawing area
*
* #StDrawingArea is similar to #ClutterCairoTexture in that
* it allows drawing via Cairo; the primary difference is that
* it is dynamically sized. To use, connect to the #StDrawingArea::redraw
* signal, and inside the signal handler, call
* clutter_cairo_texture_create() to begin drawing. The
* #StDrawingArea::redraw signal will be emitted by default when the area is
* resized or the CSS style changes; you can use the
* st_drawing_area_emit_redraw() as well.
*/
#include "st-drawing-area.h"
#include <cairo.h>
G_DEFINE_TYPE(StDrawingArea, st_drawing_area, ST_TYPE_BIN);
struct _StDrawingAreaPrivate {
ClutterCairoTexture *texture;
};
/* Signals */
enum
{
REDRAW,
LAST_SIGNAL
};
static guint st_drawing_area_signals [LAST_SIGNAL] = { 0 };
static void
st_drawing_area_allocate (ClutterActor *self,
const ClutterActorBox *box,
ClutterAllocationFlags flags)
{
StThemeNode *theme_node;
ClutterActorBox content_box;
StDrawingArea *area = ST_DRAWING_AREA (self);
int width = box->x2 - box->x1;
int height = box->y2 - box->y1;
(CLUTTER_ACTOR_CLASS (st_drawing_area_parent_class))->allocate (self, box, flags);
theme_node = st_widget_get_theme_node (ST_WIDGET (self));
st_theme_node_get_content_box (theme_node, box, &content_box);
if (width > 0 && height > 0)
{
clutter_cairo_texture_set_surface_size (area->priv->texture,
content_box.x2 - content_box.x1,
content_box.y2 - content_box.y1);
g_signal_emit (G_OBJECT (self), st_drawing_area_signals[REDRAW], 0,
area->priv->texture);
}
}
static void
st_drawing_area_style_changed (StWidget *self)
{
(ST_WIDGET_CLASS (st_drawing_area_parent_class))->style_changed (self);
st_drawing_area_emit_redraw (ST_DRAWING_AREA (self));
}
static void
st_drawing_area_class_init (StDrawingAreaClass *klass)
{
GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
ClutterActorClass *actor_class = CLUTTER_ACTOR_CLASS (klass);
StWidgetClass *widget_class = ST_WIDGET_CLASS (klass);
actor_class->allocate = st_drawing_area_allocate;
widget_class->style_changed = st_drawing_area_style_changed;
st_drawing_area_signals[REDRAW] =
g_signal_new ("redraw",
G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (StDrawingAreaClass, redraw),
NULL, NULL,
g_cclosure_marshal_VOID__OBJECT,
G_TYPE_NONE, 1, CLUTTER_TYPE_CAIRO_TEXTURE);
g_type_class_add_private (gobject_class, sizeof (StDrawingAreaPrivate));
}
static void
st_drawing_area_init (StDrawingArea *area)
{
area->priv = G_TYPE_INSTANCE_GET_PRIVATE (area, ST_TYPE_DRAWING_AREA,
StDrawingAreaPrivate);
area->priv->texture = CLUTTER_CAIRO_TEXTURE (clutter_cairo_texture_new (1, 1));
clutter_container_add_actor (CLUTTER_CONTAINER (area), CLUTTER_ACTOR (area->priv->texture));
}
/**
* st_drawing_area_get_texture:
*
* Return Value: (transfer none):
*/
ClutterCairoTexture *
st_drawing_area_get_texture (StDrawingArea *area)
{
return area->priv->texture;
}
/**
* st_drawing_area_emit_redraw:
* @area: A #StDrawingArea
*
* Immediately emit a redraw signal. Useful if
* some parameters for the area being drawn other
* than the size or style have changed.
*/
void
st_drawing_area_emit_redraw (StDrawingArea *area)
{
g_signal_emit ((GObject*)area, st_drawing_area_signals[REDRAW], 0, area->priv->texture);
}

39
src/st/st-drawing-area.h Normal file
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@ -0,0 +1,39 @@
/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */
#ifndef __ST_DRAWING_AREA_H__
#define __ST_DRAWING_AREA_H__
#include "st-bin.h"
#define ST_TYPE_DRAWING_AREA (st_drawing_area_get_type ())
#define ST_DRAWING_AREA(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), ST_TYPE_DRAWING_AREA, StDrawingArea))
#define ST_DRAWING_AREA_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), ST_TYPE_DRAWING_AREA, StDrawingAreaClass))
#define ST_IS_DRAWING_AREA(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), ST_TYPE_DRAWING_AREA))
#define ST_IS_DRAWING_AREA_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), ST_TYPE_DRAWING_AREA))
#define ST_DRAWING_AREA_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), ST_TYPE_DRAWING_AREA, StDrawingAreaClass))
typedef struct _StDrawingArea StDrawingArea;
typedef struct _StDrawingAreaClass StDrawingAreaClass;
typedef struct _StDrawingAreaPrivate StDrawingAreaPrivate;
struct _StDrawingArea
{
StBin parent;
StDrawingAreaPrivate *priv;
};
struct _StDrawingAreaClass
{
StBinClass parent_class;
void (*redraw) (StDrawingArea *area, ClutterCairoTexture *texture);
};
GType st_drawing_area_get_type (void) G_GNUC_CONST;
ClutterCairoTexture *st_drawing_area_get_texture (StDrawingArea *area);
void st_drawing_area_emit_redraw (StDrawingArea *area);
#endif /* __ST_DRAWING_AREA_H__ */