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GtkThemingEngine: Add vmethod to render backgrounds.

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This commit is contained in:
Carlos Garnacho 2010-03-27 20:06:44 +01:00
parent 01a8e06842
commit 13812de971
2 changed files with 179 additions and 0 deletions
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173
gtk/gtkthemingengine.c
View File

@ -29,6 +29,13 @@
typedef struct GtkThemingEnginePrivate GtkThemingEnginePrivate;
enum {
SIDE_LEFT = 1,
SIDE_BOTTOM = 1 << 1,
SIDE_RIGHT = 1 << 2,
SIDE_TOP = 1 << 3
};
struct GtkThemingEnginePrivate
{
GtkStyleContext *context;
@ -54,6 +61,12 @@ static void gtk_theming_engine_render_arrow (GtkThemingEngine *engine,
gdouble x,
gdouble y,
gdouble size);
static void gtk_theming_engine_render_background (GtkThemingEngine *engine,
cairo_t *cr,
gdouble x,
gdouble y,
gdouble width,
gdouble height);
G_DEFINE_TYPE (GtkThemingEngine, gtk_theming_engine, G_TYPE_OBJECT)
@ -88,6 +101,7 @@ gtk_theming_engine_class_init (GtkThemingEngineClass *klass)
klass->render_check = gtk_theming_engine_render_check;
klass->render_option = gtk_theming_engine_render_option;
klass->render_arrow = gtk_theming_engine_render_arrow;
klass->render_background = gtk_theming_engine_render_background;
g_type_class_add_private (object_class, sizeof (GtkThemingEnginePrivate));
}
@ -531,5 +545,164 @@ gtk_theming_engine_render_arrow (GtkThemingEngine *engine,
gdk_color_free (fg_color);
}
static void
add_path_rounded_rectangle (cairo_t *cr,
gdouble radius,
guint sides,
gdouble x,
gdouble y,
gdouble width,
gdouble height)
{
gdouble r = 0;
if (sides & SIDE_BOTTOM)
{
/* Bottom left corner */
if (r == 0)
cairo_move_to (cr, x + 0.5, y + height - 0.5);
else
cairo_arc_negative (cr,
x + r + 0.5,
y + height - r - 0.5,
r,
135 * (G_PI / 180),
90 * (G_PI / 180));
/* Bottom side */
cairo_line_to (cr, x + width - r - 0.5, y + height - 0.5);
/* Bottom right corner */
if (r > 0)
cairo_arc_negative (cr,
x + width - r - 0.5,
y + height - r - 0.5,
r,
90 * (G_PI / 180),
45 * (G_PI / 180));
}
if (sides & SIDE_RIGHT)
{
/* Bottom right corner */
if (r == 0)
{
if ((sides & SIDE_BOTTOM) == 0)
cairo_move_to (cr, x + width - 0.5, y + height - 0.5);
}
else
cairo_arc_negative (cr,
x + width - r - 0.5,
y + height - r - 0.5,
r,
45 * (G_PI / 180), 0);
/* Right side */
cairo_line_to (cr, x + width - 0.5, y + r);
/* Top right corner */
if (r > 0)
cairo_arc_negative (cr,
x + width - r - 0.5,
y + r + 0.5,
r,
0, 315 * (G_PI / 180));
}
if (sides & SIDE_TOP)
{
/* Top right corner */
if (r == 0)
{
if ((sides & SIDE_RIGHT) == 0)
cairo_move_to (cr, x + width - 1, y + 0.5);
}
else
cairo_arc_negative (cr,
x + width - r - 0.5,
y + r + 0.5,
r,
315 * (G_PI / 180),
270 * (G_PI / 180));
/* Top side */
cairo_line_to (cr, x + 0.5 + r, y + 0.5);
/* Top left corner */
if (r > 0)
cairo_arc_negative (cr,
x + r + 0.5,
y + r + 0.5,
r,
270 * (G_PI / 180),
225 * (G_PI / 180));
}
if (sides & SIDE_LEFT)
{
/* Top left corner */
if (r == 0)
{
if ((sides & SIDE_TOP) == 0)
cairo_move_to (cr, x + 0.5, y + 0.5);
}
else
cairo_arc_negative (cr,
x + + r + 0.5,
y + r + 0.5,
r,
225 * (G_PI / 180),
180 * (G_PI / 180));
/* Left side */
cairo_line_to (cr, x + 0.5, y + height - r);
if (r > 0)
cairo_arc_negative (cr,
x + r + 0.5,
y + height - r + 0.5,
r,
180 * (G_PI / 180),
135 * (G_PI / 180));
}
}
static void
gtk_theming_engine_render_background (GtkThemingEngine *engine,
cairo_t *cr,
gdouble x,
gdouble y,
gdouble width,
gdouble height)
{
GtkStateFlags flags;
GtkStateType state;
GdkColor *bg_color;
cairo_save (cr);
flags = gtk_theming_engine_get_state (engine);
if (flags & GTK_STATE_FLAG_PRELIGHT)
state = GTK_STATE_PRELIGHT;
else if (flags & GTK_STATE_FLAG_INSENSITIVE)
state = GTK_STATE_INSENSITIVE;
else
state = GTK_STATE_NORMAL;
gtk_theming_engine_get (engine, state,
"background-color", &bg_color,
NULL);
add_path_rounded_rectangle (cr, 0,
SIDE_BOTTOM | SIDE_RIGHT | SIDE_TOP | SIDE_LEFT,
x, y, width, height);
cairo_close_path (cr);
gdk_cairo_set_source_color (cr, bg_color);
cairo_fill (cr);
cairo_restore (cr);
}
#define __GTK_THEMING_ENGINE_C__
#include "gtkaliasdef.c"

6
gtk/gtkthemingengine.h
View File

@ -49,6 +49,12 @@ struct GtkThemingEngineClass
{
GObjectClass parent_class;
void (* render_background) (GtkThemingEngine *engine,
cairo_t *cr,
gdouble x,
gdouble y,
gdouble width,
gdouble height);
void (* render_check) (GtkThemingEngine *engine,
cairo_t *cr,
gdouble x,