1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
|
/* Paintable/Emblems
*
* This demo shows how GdkPaintable can be used to
* overlay an emblem on top of an icon. The emblem
* can either be another icon, or an arbitrary
* paintable.
*/
#include <gtk/gtk.h>
#include "paintable.h"
static GtkWidget *window = NULL;
#define DEMO_TYPE_ICON (demo_icon_get_type ())
G_DECLARE_FINAL_TYPE (DemoIcon, demo_icon, DEMO, ICON, GObject)
struct _DemoIcon
{
GObject parent_instance;
GdkPaintable *icon;
GdkPaintable *emblem;
GdkPaintableFlags flags;
};
struct _DemoIconClass
{
GObjectClass parent_class;
};
void
demo_icon_snapshot (GdkPaintable *paintable,
GtkSnapshot *snapshot,
double width,
double height)
{
DemoIcon *self = DEMO_ICON (paintable);
gdk_paintable_snapshot (self->icon, snapshot, width, height);
gtk_snapshot_save (snapshot);
gtk_snapshot_translate (snapshot, &GRAPHENE_POINT_INIT (0.5 * width, 0));
gdk_paintable_snapshot (self->emblem, snapshot, 0.5 * width, 0.5 * height);
gtk_snapshot_restore (snapshot);
}
static GdkPaintableFlags
demo_icon_get_flags (GdkPaintable *paintable)
{
DemoIcon *self = DEMO_ICON (paintable);
return self->flags;
}
static void
demo_icon_paintable_init (GdkPaintableInterface *iface)
{
iface->snapshot = demo_icon_snapshot;
iface->get_flags = demo_icon_get_flags;
}
G_DEFINE_TYPE_WITH_CODE (DemoIcon, demo_icon, G_TYPE_OBJECT,
G_IMPLEMENT_INTERFACE (GDK_TYPE_PAINTABLE,
demo_icon_paintable_init))
static void
demo_icon_dispose (GObject *object)
{
DemoIcon *self = DEMO_ICON (object);
g_signal_handlers_disconnect_by_func (self->emblem,
gdk_paintable_invalidate_contents,
self);
g_clear_object (&self->icon);
g_clear_object (&self->emblem);
G_OBJECT_CLASS (demo_icon_parent_class)->dispose (object);
}
static void
demo_icon_class_init (DemoIconClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
object_class->dispose = demo_icon_dispose;
}
static void
demo_icon_init (DemoIcon *self)
{
self->flags = GDK_PAINTABLE_STATIC_SIZE | GDK_PAINTABLE_STATIC_CONTENTS;
}
GdkPaintable *
demo_icon_new_with_paintable (const char *icon_name,
GdkPaintable *emblem)
{
GtkIconTheme *theme;
GtkIconPaintable *icon;
DemoIcon *self;
theme = gtk_icon_theme_get_for_display (gdk_display_get_default ());
icon = gtk_icon_theme_lookup_icon (theme,
icon_name, NULL,
128, 1,
GTK_TEXT_DIR_LTR, 0);
self = g_object_new (DEMO_TYPE_ICON, NULL);
self->icon = GDK_PAINTABLE (icon);
self->emblem = emblem;
if ((gdk_paintable_get_flags (emblem) & GDK_PAINTABLE_STATIC_CONTENTS) == 0)
{
self->flags &= ~GDK_PAINTABLE_STATIC_CONTENTS;
g_signal_connect_swapped (emblem, "invalidate-contents",
G_CALLBACK (gdk_paintable_invalidate_contents), self);
}
return GDK_PAINTABLE (self);
}
GdkPaintable *
demo_icon_new (const char *icon_name,
const char *emblem_name)
{
GtkIconTheme *theme;
GtkIconPaintable *emblem;
theme = gtk_icon_theme_get_for_display (gdk_display_get_default ());
emblem = gtk_icon_theme_lookup_icon (theme,
emblem_name, NULL,
128, 1,
GTK_TEXT_DIR_LTR, 0);
return GDK_PAINTABLE (demo_icon_new_with_paintable (icon_name,
GDK_PAINTABLE (emblem)));
}
GtkWidget *
do_paintable_emblem (GtkWidget *do_widget)
{
GdkPaintable *icon;
GtkWidget *grid;
GtkWidget *image;
if (!window)
{
window = gtk_window_new ();
gtk_window_set_display (GTK_WINDOW (window),
gtk_widget_get_display (do_widget));
gtk_window_set_title (GTK_WINDOW (window), "Paintable — Emblems");
gtk_window_set_default_size (GTK_WINDOW (window), 300, 200);
g_object_add_weak_pointer (G_OBJECT (window), (gpointer *)&window);
grid = gtk_grid_new ();
icon = demo_icon_new ("folder", "starred");
image = gtk_image_new_from_paintable (icon);
gtk_widget_set_hexpand (image, TRUE);
gtk_widget_set_vexpand (image, TRUE);
gtk_grid_attach (GTK_GRID (grid), image, 0, 0, 1, 1);
icon = demo_icon_new_with_paintable ("drive-multidisk",
gtk_nuclear_animation_new (FALSE));
image = gtk_image_new_from_paintable (icon);
gtk_widget_set_hexpand (image, TRUE);
gtk_widget_set_vexpand (image, TRUE);
gtk_grid_attach (GTK_GRID (grid), image, 1, 0, 1, 1);
gtk_window_set_child (GTK_WINDOW (window), grid);
g_object_unref (icon);
}
if (!gtk_widget_get_visible (window))
gtk_widget_show (window);
else
gtk_window_destroy (GTK_WINDOW (window));
return window;
}
|
