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
|
/* -*- Mode: C; indent-tabs-mode: t; c-basic-offset: 8; tab-width: 8 -*-
nautilus-background.c: Object for the background of a widget.
Copyright (C) 2000 Eazel, Inc.
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License as
published by the Free Software Foundation; either version 2 of the
License, or (at your option) any later version.
This program 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
General Public License for more details.
You should have received a copy of the GNU General Public
License along with this program; if not, write to the
Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA.
Author: Darin Adler <darin@eazel.com>
*/
#include <config.h>
#include "nautilus-background-canvas-group.h"
#include <libgnomeui/gnome-canvas.h>
#include <libgnomeui/gnome-canvas-util.h>
#include <libart_lgpl/art_rgb_affine.h>
#include <libart_lgpl/art_rgb_rgba_affine.h>
#include "nautilus-background.h"
#include "nautilus-gdk-extensions.h"
#include "nautilus-gtk-macros.h"
static void nautilus_background_canvas_group_initialize_class (gpointer klass);
static void nautilus_background_canvas_group_initialize (gpointer object,
gpointer klass);
static void nautilus_background_canvas_group_draw (GnomeCanvasItem *item,
GdkDrawable *drawable,
int x,
int y,
int width,
int height);
static void nautilus_background_canvas_group_render (GnomeCanvasItem *item,
GnomeCanvasBuf *buffer);
NAUTILUS_DEFINE_CLASS_BOILERPLATE (NautilusBackgroundCanvasGroup, nautilus_background_canvas_group, GNOME_TYPE_CANVAS_GROUP)
static void
nautilus_background_canvas_group_initialize_class (gpointer klass)
{
GNOME_CANVAS_ITEM_CLASS (klass)->draw = nautilus_background_canvas_group_draw;
GNOME_CANVAS_ITEM_CLASS (klass)->render = nautilus_background_canvas_group_render;
}
static void
nautilus_background_canvas_group_initialize (gpointer object, gpointer klass)
{
}
static void
nautilus_background_canvas_group_draw (GnomeCanvasItem *item, GdkDrawable *drawable,
int drawable_corner_x, int drawable_corner_y,
int drawable_width, int drawable_height)
{
NautilusBackground *background;
GdkGC *gc;
GdkRectangle rectangle;
/* Draw the background. */
background = nautilus_get_widget_background (GTK_WIDGET (item->canvas));
/* If GtkStyle handled it, then we don't want to bother doing
* any additional work. It would be way slow to draw again.
*/
if (nautilus_background_is_too_complex_for_gtk_style (background)) {
/* Create a new gc each time.
* If this is a speed problem, we can create one and keep it around,
* but it's a bit more complicated to ensure that it's always compatible
* with whatever drawable is passed in.
*/
gc = gdk_gc_new (drawable);
/* The rectangle is the size of the entire viewed area
* of the canvas. The corner is determined by the
* current scroll position of the GtkLayout, and the
* size is determined by the current size of the
* widget. Since 0,0 is the corner of the drawable,
* we need to offset the rectangle so it's relative to
* the drawable's coordinates.
*/
rectangle.x = GTK_LAYOUT (item->canvas)->xoffset - drawable_corner_x;
rectangle.y = GTK_LAYOUT (item->canvas)->yoffset - drawable_corner_y;
rectangle.width = GTK_WIDGET (item->canvas)->allocation.width;
rectangle.height = GTK_WIDGET (item->canvas)->allocation.height;
nautilus_background_draw (background, drawable, gc, &rectangle,
-drawable_corner_x, -drawable_corner_y);
gdk_gc_unref (gc);
}
/* Call through to the GnomeCanvasGroup implementation, which
* will draw all the canvas items.
*/
NAUTILUS_CALL_PARENT_CLASS (GNOME_CANVAS_ITEM_CLASS, draw,
(item, drawable,
drawable_corner_x, drawable_corner_y,
drawable_width, drawable_height));
}
/* draw the background for the anti-aliased canvas case */
static void
nautilus_background_canvas_group_render (GnomeCanvasItem *item, GnomeCanvasBuf *buffer)
{
NautilusBackground *background;
double left, top, bottom, right;
int entire_width, entire_height;
background = nautilus_get_widget_background (GTK_WIDGET (item->canvas));
if (background != NULL) {
/* FIXME: Don't we want to draw the background for the size of the window
* rather than the whole canvas? This won't work right for gradients, will it?
*/
gnome_canvas_get_scroll_region (GNOME_CANVAS(item->canvas),
&left, &top, &right, &bottom);
/* FIXME: Icons can go past bounds? News to me! (Darin)
* This slop value of 24 must die.
*/
entire_width = right - left + 24; /* add some slop since icons can go past bounds */
entire_height = bottom - top + 24;
nautilus_background_draw_aa (background, buffer, entire_width, entire_height);
/* FIXME: Shouldn't nautilus_background_draw_aa do these? */
buffer->is_bg = FALSE;
buffer->is_buf = TRUE;
} else {
/* FIXME: Why do we need this in this case? */
gnome_canvas_buf_ensure_buf (buffer);
}
/* Call through to the GnomeCanvasGroup implementation, which will draw all
* the canvas items.
*/
NAUTILUS_CALL_PARENT_CLASS (GNOME_CANVAS_ITEM_CLASS, render, (item, buffer));
}
|
