1 #define __INKSCAPE_CTRLPOINT_C__
3 /*
4 * Simple point
5 *
6 * Author:
7 * Maximilian Albert <maximilian.albert@gmail.com>
8 *
9 * Copyright (C) 2008 Maximilian Albert
10 *
11 * Released under GNU GPL
12 */
14 #include "sp-canvas-util.h"
15 #include "sp-ctrlpoint.h"
17 #ifdef HAVE_CONFIG_H
18 # include "config.h"
19 #endif
20 #include <color.h>
21 #include "display/inkscape-cairo.h"
24 static void sp_ctrlpoint_class_init (SPCtrlPointClass *klass);
25 static void sp_ctrlpoint_init (SPCtrlPoint *ctrlpoint);
26 static void sp_ctrlpoint_destroy (GtkObject *object);
28 static void sp_ctrlpoint_update (SPCanvasItem *item, Geom::Matrix const &affine, unsigned int flags);
29 static void sp_ctrlpoint_render (SPCanvasItem *item, SPCanvasBuf *buf);
31 static SPCanvasItemClass *parent_class;
33 GType
34 sp_ctrlpoint_get_type (void)
35 {
36 static GType type = 0;
37 if (!type) {
38 GTypeInfo info = {
39 sizeof(SPCtrlPointClass),
40 NULL, NULL,
41 (GClassInitFunc) sp_ctrlpoint_class_init,
42 NULL, NULL,
43 sizeof(SPCtrlPoint),
44 0,
45 (GInstanceInitFunc) sp_ctrlpoint_init,
46 NULL
47 };
48 type = g_type_register_static(SP_TYPE_CANVAS_ITEM, "SPCtrlPoint", &info, (GTypeFlags)0);
49 }
50 return type;
51 }
53 static void
54 sp_ctrlpoint_class_init (SPCtrlPointClass *klass)
55 {
56 GtkObjectClass *object_class = (GtkObjectClass *) klass;
57 SPCanvasItemClass *item_class = (SPCanvasItemClass *) klass;
59 parent_class = (SPCanvasItemClass*)gtk_type_class (SP_TYPE_CANVAS_ITEM);
61 object_class->destroy = sp_ctrlpoint_destroy;
63 item_class->update = sp_ctrlpoint_update;
64 item_class->render = sp_ctrlpoint_render;
65 }
67 static void
68 sp_ctrlpoint_init (SPCtrlPoint *ctrlpoint)
69 {
70 ctrlpoint->rgba = 0x0000ff7f;
71 ctrlpoint->pt[Geom::X] = ctrlpoint->pt[Geom::Y] = 0.0;
72 ctrlpoint->item=NULL;
73 ctrlpoint->radius = 2;
74 }
76 static void
77 sp_ctrlpoint_destroy (GtkObject *object)
78 {
79 g_return_if_fail (object != NULL);
80 g_return_if_fail (SP_IS_CTRLPOINT (object));
82 SPCtrlPoint *ctrlpoint = SP_CTRLPOINT (object);
84 ctrlpoint->item=NULL;
86 if (GTK_OBJECT_CLASS (parent_class)->destroy)
87 (* GTK_OBJECT_CLASS (parent_class)->destroy) (object);
88 }
90 static void
91 sp_ctrlpoint_render (SPCanvasItem *item, SPCanvasBuf *buf)
92 {
93 SPCtrlPoint *cp = SP_CTRLPOINT (item);
95 if (!buf->ct)
96 return;
98 sp_canvas_prepare_buffer (buf);
100 guint32 rgba = cp->rgba;
101 cairo_set_source_rgba(buf->ct, SP_RGBA32_B_F(rgba), SP_RGBA32_G_F(rgba), SP_RGBA32_R_F(rgba), SP_RGBA32_A_F(rgba));
103 cairo_set_line_width(buf->ct, 1);
104 cairo_new_path(buf->ct);
106 Geom::Point pt = cp->pt * cp->affine;
108 cairo_arc(buf->ct, pt[Geom::X] - buf->rect.x0, pt[Geom::Y] - buf->rect.y0, cp->radius, 0.0, 2 * M_PI);
109 cairo_stroke(buf->ct);
110 }
112 static void
113 sp_ctrlpoint_update (SPCanvasItem *item, Geom::Matrix const &affine, unsigned int flags)
114 {
115 SPCtrlPoint *cp = SP_CTRLPOINT (item);
117 sp_canvas_request_redraw (item->canvas, (int)item->x1, (int)item->y1, (int)item->x2, (int)item->y2);
119 if (parent_class->update)
120 (* parent_class->update) (item, affine, flags);
122 sp_canvas_item_reset_bounds (item);
124 cp->affine = affine;
126 Geom::Point pt = cp->pt * affine;
128 item->x1 = pt[Geom::X] - cp->radius;
129 item->y1 = pt[Geom::Y] - cp->radius;
130 item->x2 = pt[Geom::X] + cp->radius;
131 item->y2 = pt[Geom::Y] + cp->radius;
133 sp_canvas_request_redraw (item->canvas,
134 (int)item->x1 - 15, (int)item->y1 - 15,
135 (int)item->x1 + 15, (int)item->y1 + 15);
136 }
138 void
139 sp_ctrlpoint_set_color (SPCtrlPoint *cp, guint32 rgba)
140 {
141 g_return_if_fail (cp != NULL);
142 g_return_if_fail (SP_IS_CTRLPOINT (cp));
144 if (rgba != cp->rgba) {
145 SPCanvasItem *item;
146 cp->rgba = rgba;
147 item = SP_CANVAS_ITEM (cp);
148 sp_canvas_request_redraw (item->canvas, (int)item->x1, (int)item->y1, (int)item->x2, (int)item->y2);
149 }
150 }
152 #define EPSILON 1e-6
153 #define DIFFER(a,b) (fabs ((a) - (b)) > EPSILON)
155 void
156 sp_ctrlpoint_set_coords (SPCtrlPoint *cp, const gdouble x, const gdouble y)
157 {
158 g_return_if_fail (cp != NULL);
159 g_return_if_fail (SP_IS_CTRLPOINT (cp));
161 if (DIFFER (x, cp->pt[Geom::X]) || DIFFER (y, cp->pt[Geom::Y])) {
162 cp->pt[Geom::X] = x;
163 cp->pt[Geom::Y] = y;
164 sp_canvas_item_request_update (SP_CANVAS_ITEM (cp));
165 }
166 }
168 void
169 sp_ctrlpoint_set_coords (SPCtrlPoint *cp, const Geom::Point pt)
170 {
171 sp_ctrlpoint_set_coords(cp, pt[Geom::X], pt[Geom::Y]);
172 }
174 void
175 sp_ctrlpoint_set_radius (SPCtrlPoint *cp, const double r)
176 {
177 cp->radius = r;
178 }
180 /*
181 Local Variables:
182 mode:c++
183 c-file-style:"stroustrup"
184 c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
185 indent-tabs-mode:nil
186 fill-column:99
187 End:
188 */
189 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:fileencoding=utf-8:textwidth=99 :