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shadow: render icon-shadow for spinners

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This commit is contained in:
Cosimo Cecchi
2011-06-06 11:38:45 -04:00
committed by Benjamin Otte
parent aa37e7323f
commit 1208f2bde0
5 changed files with 160 additions and 52 deletions
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1
gtk/Makefile.am
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@ -445,6 +445,7 @@ gtk_private_h_sources = \
gtktexttagprivate.h \
gtktexttypes.h \
gtktextutil.h \
gtkthemingengineprivate.h \
gtktimeline.h \
gtktoolpaletteprivate.h \
gtktreedatalist.h \

25
gtk/gtkshadow.c
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@ -24,6 +24,7 @@
#include "gtkshadowprivate.h"
#include "gtkstylecontext.h"
#include "gtkpango.h"
#include "gtkthemingengineprivate.h"
typedef struct _GtkShadowElement GtkShadowElement;
@ -298,3 +299,27 @@ _gtk_icon_shadow_paint (GtkShadow *shadow,
cairo_pattern_destroy (pattern);
}
}
void
_gtk_icon_shadow_paint_spinner (GtkShadow *shadow,
cairo_t *cr,
gdouble radius,
gdouble progress)
{
GtkShadowElement *element;
GList *l;
for (l = g_list_last (shadow->elements); l != NULL; l = l->prev)
{
element = l->data;
cairo_save (cr);
cairo_translate (cr, element->hoffset, element->voffset);
_gtk_theming_engine_paint_spinner (cr,
radius, progress,
&element->color);
cairo_restore (cr);
}
}

5
gtk/gtkshadowprivate.h
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@ -61,6 +61,11 @@ void _gtk_text_shadow_paint_layout (GtkShadow *shadow,
void _gtk_icon_shadow_paint (GtkShadow *shadow,
cairo_t *cr);
void _gtk_icon_shadow_paint_spinner (GtkShadow *shadow,
cairo_t *cr,
gdouble radius,
gdouble progress);
G_END_DECLS
#endif /* __GTK_SHADOW_H__ */

151
gtk/gtkthemingengine.c
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@ -31,6 +31,7 @@
#include "gtkpango.h"
#include "gtkshadowprivate.h"
#include "gtkcsstypesprivate.h"
#include "gtkthemingengineprivate.h"
/**
* SECTION:gtkthemingengine
@ -3031,6 +3032,103 @@ gtk_theming_engine_render_handle (GtkThemingEngine *engine,
cairo_restore (cr);
}
void
_gtk_theming_engine_paint_spinner (cairo_t *cr,
gdouble radius,
gdouble progress,
GdkRGBA *color)
{
guint num_steps, step;
gdouble half;
gint i;
num_steps = 12;
if (progress >= 0)
step = (guint) (progress * num_steps);
else
step = 0;
cairo_save (cr);
cairo_set_operator (cr, CAIRO_OPERATOR_OVER);
cairo_set_line_width (cr, 2.0);
half = num_steps / 2;
for (i = 0; i < num_steps; i++)
{
gint inset = 0.7 * radius;
/* transparency is a function of time and intial value */
gdouble t = 1.0 - (gdouble) ((i + step) % num_steps) / num_steps;
gdouble xscale = - sin (i * G_PI / half);
gdouble yscale = - cos (i * G_PI / half);
cairo_set_source_rgba (cr,
color->red,
color->green,
color->blue,
color->alpha * t);
cairo_move_to (cr,
(radius - inset) * xscale,
(radius - inset) * yscale);
cairo_line_to (cr,
radius * xscale,
radius * yscale);
cairo_stroke (cr);
}
cairo_restore (cr);
}
static void
render_spinner (GtkThemingEngine *engine,
cairo_t *cr,
gdouble x,
gdouble y,
gdouble width,
gdouble height)
{
GtkStateFlags state;
GtkShadow *shadow;
GdkRGBA color;
gdouble progress;
gdouble radius;
state = gtk_theming_engine_get_state (engine);
if (!gtk_theming_engine_state_is_running (engine, GTK_STATE_ACTIVE, &progress))
progress = -1;
radius = MIN (width / 2, height / 2);
gtk_theming_engine_get_color (engine, state, &color);
gtk_theming_engine_get (engine, state,
"icon-shadow", &shadow,
NULL);
cairo_save (cr);
cairo_translate (cr, x + width / 2, y + height / 2);
if (shadow != NULL)
{
_gtk_icon_shadow_paint_spinner (shadow, cr,
radius,
progress);
_gtk_shadow_unref (shadow);
}
_gtk_theming_engine_paint_spinner (cr,
radius,
progress,
&color);
cairo_restore (cr);
}
static void
gtk_theming_engine_render_activity (GtkThemingEngine *engine,
cairo_t *cr,
@ -3041,58 +3139,7 @@ gtk_theming_engine_render_activity (GtkThemingEngine *engine,
{
if (gtk_theming_engine_has_class (engine, GTK_STYLE_CLASS_SPINNER))
{
GtkStateFlags state;
guint num_steps, step;
GdkRGBA color;
gdouble progress;
gdouble radius;
gdouble half;
gint i;
num_steps = 12;
state = gtk_theming_engine_get_state (engine);
gtk_theming_engine_get_color (engine, state, &color);
if (gtk_theming_engine_state_is_running (engine, GTK_STATE_ACTIVE, &progress))
step = (guint) (progress * num_steps);
else
step = 0;
cairo_save (cr);
cairo_set_operator (cr, CAIRO_OPERATOR_OVER);
cairo_set_line_width (cr, 2.0);
cairo_translate (cr, x + width / 2, y + height / 2);
radius = MIN (width / 2, height / 2);
half = num_steps / 2;
for (i = 0; i < num_steps; i++)
{
gint inset = 0.7 * radius;
/* transparency is a function of time and intial value */
gdouble t = 1.0 - (gdouble) ((i + step) % num_steps) / num_steps;
gdouble xscale = - sin (i * G_PI / half);
gdouble yscale = - cos (i * G_PI / half);
cairo_set_source_rgba (cr,
color.red,
color.green,
color.blue,
color.alpha * t);
cairo_move_to (cr,
(radius - inset) * xscale,
(radius - inset) * yscale);
cairo_line_to (cr,
radius * xscale,
radius * yscale);
cairo_stroke (cr);
}
cairo_restore (cr);
render_spinner (engine, cr, x, y, width, height);
}
else
{

30
gtk/gtkthemingengineprivate.h Normal file
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@ -0,0 +1,30 @@
/* GTK - The GIMP Toolkit
* Copyright (C) 2010 Carlos Garnacho <carlosg@gnome.org>
*
* This library 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 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser 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.
*/
#ifndef __GTK_THEMING_ENGINE_PRIVATE_H__
#define __GTK_THEMING_ENGINE_PRIVATE_H__
#include <gdk/gdk.h>
void _gtk_theming_engine_paint_spinner (cairo_t *cr,
gdouble radius,
gdouble progress,
GdkRGBA *color);
#endif /* __GTK_THEMING_ENGINE_PRIVATE_H__ */