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
187
188
189
190
191
192
193
194
195
196
197
|
#define __SP_GRADIENT_IMAGE_C__
/*
* A simple gradient preview
*
* Author:
* Lauris Kaplinski <lauris@kaplinski.com>
*
* Copyright (C) 2001-2002 Lauris Kaplinski
* Copyright (C) 2001 Ximian, Inc.
*
* Released under GNU GPL, read the file 'COPYING' for more information
*/
#include "macros.h"
#include "display/cairo-utils.h"
#include "gradient-image.h"
#include "sp-gradient.h"
#include "sp-gradient-fns.h"
#include <sigc++/functors/ptr_fun.h>
#include <sigc++/adaptors/bind.h>
#define VBLOCK 16
static void sp_gradient_image_class_init (SPGradientImageClass *klass);
static void sp_gradient_image_init (SPGradientImage *image);
static void sp_gradient_image_destroy (GtkObject *object);
static void sp_gradient_image_size_request (GtkWidget *widget, GtkRequisition *requisition);
static gint sp_gradient_image_expose (GtkWidget *widget, GdkEventExpose *event);
static void sp_gradient_image_gradient_release (SPObject *, SPGradientImage *im);
static void sp_gradient_image_gradient_modified (SPObject *, guint flags, SPGradientImage *im);
static void sp_gradient_image_update (SPGradientImage *img);
static GtkWidgetClass *parent_class;
GType
sp_gradient_image_get_type (void)
{
static GType type = 0;
if (!type) {
GTypeInfo info = {
sizeof (SPGradientImageClass),
NULL, NULL,
(GClassInitFunc) sp_gradient_image_class_init,
NULL, NULL,
sizeof (SPGradientImage),
0,
(GInstanceInitFunc) sp_gradient_image_init,
NULL
};
type = g_type_register_static (GTK_TYPE_WIDGET, "SPGradientImage", &info, (GTypeFlags)0);
}
return type;
}
static void
sp_gradient_image_class_init (SPGradientImageClass *klass)
{
GtkObjectClass *object_class;
GtkWidgetClass *widget_class;
object_class = (GtkObjectClass *) klass;
widget_class = (GtkWidgetClass *) klass;
parent_class = (GtkWidgetClass*)gtk_type_class (GTK_TYPE_WIDGET);
object_class->destroy = sp_gradient_image_destroy;
widget_class->size_request = sp_gradient_image_size_request;
widget_class->expose_event = sp_gradient_image_expose;
}
static void
sp_gradient_image_init (SPGradientImage *image)
{
GTK_WIDGET_SET_FLAGS (image, GTK_NO_WINDOW);
image->gradient = NULL;
new (&image->release_connection) sigc::connection();
new (&image->modified_connection) sigc::connection();
}
static void
sp_gradient_image_destroy (GtkObject *object)
{
SPGradientImage *image;
image = SP_GRADIENT_IMAGE (object);
if (image->gradient) {
image->release_connection.disconnect();
image->modified_connection.disconnect();
image->gradient = NULL;
}
image->release_connection.~connection();
image->modified_connection.~connection();
if (((GtkObjectClass *) (parent_class))->destroy)
(* ((GtkObjectClass *) (parent_class))->destroy) (object);
}
static void sp_gradient_image_size_request(GtkWidget * /*widget*/, GtkRequisition *requisition)
{
requisition->width = 64;
requisition->height = 12;
}
static gint
sp_gradient_image_expose (GtkWidget *widget, GdkEventExpose *event)
{
SPGradientImage *image = SP_GRADIENT_IMAGE (widget);
SPGradient *gr = image->gradient;
cairo_t *ct = gdk_cairo_create(widget->window);
cairo_rectangle(ct, event->area.x, event->area.y,
event->area.width, event->area.height);
cairo_clip(ct);
cairo_translate(ct, widget->allocation.x, widget->allocation.y);
cairo_pattern_t *check = ink_cairo_pattern_create_checkerboard();
cairo_set_source(ct, check);
cairo_paint(ct);
cairo_pattern_destroy(check);
if (gr) {
cairo_pattern_t *p = sp_gradient_create_preview_pattern(gr, widget->allocation.width);
cairo_set_source(ct, p);
cairo_paint(ct);
cairo_pattern_destroy(p);
}
cairo_destroy(ct);
return TRUE;
}
GtkWidget *
sp_gradient_image_new (SPGradient *gradient)
{
SPGradientImage *image;
image = (SPGradientImage*)gtk_type_new (SP_TYPE_GRADIENT_IMAGE);
sp_gradient_image_set_gradient (image, gradient);
return (GtkWidget *) image;
}
void
sp_gradient_image_set_gradient (SPGradientImage *image, SPGradient *gradient)
{
if (image->gradient) {
image->release_connection.disconnect();
image->modified_connection.disconnect();
}
image->gradient = gradient;
if (gradient) {
image->release_connection = gradient->connectRelease(sigc::bind<1>(sigc::ptr_fun(&sp_gradient_image_gradient_release), image));
image->modified_connection = gradient->connectModified(sigc::bind<2>(sigc::ptr_fun(&sp_gradient_image_gradient_modified), image));
}
sp_gradient_image_update (image);
}
static void
sp_gradient_image_gradient_release (SPObject *, SPGradientImage *image)
{
if (image->gradient) {
image->release_connection.disconnect();
image->modified_connection.disconnect();
}
image->gradient = NULL;
sp_gradient_image_update (image);
}
static void
sp_gradient_image_gradient_modified (SPObject *, guint /*flags*/, SPGradientImage *image)
{
sp_gradient_image_update (image);
}
static void
sp_gradient_image_update (SPGradientImage *image)
{
if (GTK_WIDGET_DRAWABLE (image)) {
gtk_widget_queue_draw (GTK_WIDGET (image));
}
}
|
