1 /* GTK - The GIMP Toolkit
2 * Copyright (C) 2012 Red Hat, Inc.
4 * This library is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Lesser General Public
6 * License as published by the Free Software Foundation; either
7 * version 2 of the License, or (at your option) any later version.
9 * This library is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * Lesser General Public License for more details.
14 * You should have received a copy of the GNU Lesser General Public
15 * License along with this library; if not, write to the
16 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
17 * Boston, MA 02111-1307, USA.
23 #include "gtkcolorplane.h"
24 #include "gtkcontainer.h"
25 #include "gtkwindow.h"
26 #include "gtkbutton.h"
28 struct _GtkColorPlanePrivate
34 cairo_surface_t *surface;
39 G_DEFINE_TYPE (GtkColorPlane, gtk_color_plane, GTK_TYPE_DRAWING_AREA)
42 sv_draw (GtkWidget *widget,
45 GtkColorPlane *plane = GTK_COLOR_PLANE (widget);
49 cairo_set_source_surface (cr, plane->priv->surface, 0, 0);
54 width = gtk_widget_get_allocated_width (widget);
55 height = gtk_widget_get_allocated_height (widget);
57 cairo_move_to (cr, 0, y + 0.5);
58 cairo_line_to (cr, width, y + 0.5);
60 cairo_move_to (cr, x + 0.5, 0);
61 cairo_line_to (cr, x + 0.5, height);
63 if (gtk_widget_has_visible_focus (widget))
65 cairo_set_line_width (cr, 3.0);
66 cairo_set_source_rgba (cr, 1.0, 1.0, 1.0, 0.6);
67 cairo_stroke_preserve (cr);
69 cairo_set_line_width (cr, 1.0);
70 cairo_set_source_rgba (cr, 0.0, 0.0, 0.0, 0.8);
75 cairo_set_line_width (cr, 1.0);
76 cairo_set_source_rgba (cr, 0.8, 0.8, 0.8, 0.8);
84 create_sv_surface (GtkColorPlane *plane)
86 GtkWidget *widget = GTK_WIDGET (plane);
88 cairo_surface_t *surface;
89 gint width, height, stride;
91 guint red, green, blue;
98 if (!gtk_widget_get_realized (widget))
101 width = gtk_widget_get_allocated_width (widget);
102 height = gtk_widget_get_allocated_height (widget);
104 surface = gdk_window_create_similar_surface (gtk_widget_get_window (widget),
108 if (plane->priv->surface)
109 cairo_surface_destroy (plane->priv->surface);
110 plane->priv->surface = surface;
112 if (width == 1 || height == 1)
115 stride = cairo_format_stride_for_width (CAIRO_FORMAT_RGB24, width);
117 data = g_malloc (height * stride);
119 h = gtk_adjustment_get_value (plane->priv->h_adj);
120 sf = 1.0 / (height - 1);
121 vf = 1.0 / (width - 1);
122 for (y = 0; y < height; y++)
124 s = CLAMP (1.0 - y * sf, 0.0, 1.0);
125 p = data + y * (stride / 4);
126 for (x = 0; x < width; x++)
129 gtk_hsv_to_rgb (h, s, v, &r, &g, &b);
130 red = CLAMP (r * 255, 0, 255);
131 green = CLAMP (g * 255, 0, 255);
132 blue = CLAMP (b * 255, 0, 255);
133 p[x] = (red << 16) | (green << 8) | blue;
137 tmp = cairo_image_surface_create_for_data ((guchar *)data, CAIRO_FORMAT_RGB24,
138 width, height, stride);
139 cr = cairo_create (surface);
141 cairo_set_source_surface (cr, tmp, 0, 0);
145 cairo_surface_destroy (tmp);
150 hsv_to_xy (GtkColorPlane *plane)
155 width = gtk_widget_get_allocated_width (GTK_WIDGET (plane));
156 height = gtk_widget_get_allocated_height (GTK_WIDGET (plane));
158 s = gtk_adjustment_get_value (plane->priv->s_adj);
159 v = gtk_adjustment_get_value (plane->priv->v_adj);
160 plane->priv->x = CLAMP (width * v, 0, width - 1);
161 plane->priv->y = CLAMP (height * (1 - s), 0, height - 1);
165 sv_configure (GtkWidget *widget,
166 GdkEventConfigure *event)
168 GtkColorPlane *plane = GTK_COLOR_PLANE (widget);
170 create_sv_surface (plane);
177 set_cross_grab (GtkWidget *widget,
183 cursor = gdk_cursor_new_for_display (gtk_widget_get_display (GTK_WIDGET (widget)),
185 gdk_device_grab (device,
186 gtk_widget_get_window (widget),
189 GDK_POINTER_MOTION_MASK
190 | GDK_POINTER_MOTION_HINT_MASK
191 | GDK_BUTTON_RELEASE_MASK,
194 g_object_unref (cursor);
198 sv_grab_broken (GtkWidget *widget,
199 GdkEventGrabBroken *event)
201 GtkColorPlane *plane = GTK_COLOR_PLANE (widget);
203 plane->priv->in_drag = FALSE;
209 sv_update_color (GtkColorPlane *plane,
213 GtkWidget *widget = GTK_WIDGET (plane);
219 s = CLAMP (1 - y * (1.0 / gtk_widget_get_allocated_height (widget)), 0, 1);
220 v = CLAMP (x * (1.0 / gtk_widget_get_allocated_width (widget)), 0, 1);
221 gtk_adjustment_set_value (plane->priv->s_adj, s);
222 gtk_adjustment_set_value (plane->priv->v_adj, v);
223 gtk_widget_queue_draw (widget);
227 sv_button_press (GtkWidget *widget,
228 GdkEventButton *event)
230 GtkColorPlane *plane = GTK_COLOR_PLANE (widget);
232 if (event->button == GDK_BUTTON_SECONDARY)
236 g_signal_emit_by_name (widget, "popup-menu", &handled);
241 if (plane->priv->in_drag || event->button != GDK_BUTTON_PRIMARY)
244 plane->priv->in_drag = TRUE;
245 set_cross_grab (widget, gdk_event_get_device ((GdkEvent*)event), event->time);
246 sv_update_color (plane, event->x, event->y);
247 gtk_widget_grab_focus (widget);
253 sv_button_release (GtkWidget *widget,
254 GdkEventButton *event)
256 GtkColorPlane *plane = GTK_COLOR_PLANE (widget);
258 if (!plane->priv->in_drag || event->button != GDK_BUTTON_PRIMARY)
261 plane->priv->in_drag = FALSE;
263 sv_update_color (plane, event->x, event->y);
264 gdk_device_ungrab (gdk_event_get_device ((GdkEvent *) event), event->time);
270 sv_motion (GtkWidget *widget,
271 GdkEventMotion *event)
273 GtkColorPlane *plane = GTK_COLOR_PLANE (widget);
275 if (!plane->priv->in_drag)
278 gdk_event_request_motions (event);
279 sv_update_color (plane, event->x, event->y);
285 h_changed (GtkColorPlane *plane)
287 create_sv_surface (plane);
288 gtk_widget_queue_draw (GTK_WIDGET (plane));
292 sv_changed (GtkColorPlane *plane)
295 gtk_widget_queue_draw (GTK_WIDGET (plane));
299 sv_move (GtkColorPlane *plane,
305 s = gtk_adjustment_get_value (plane->priv->s_adj);
306 v = gtk_adjustment_get_value (plane->priv->v_adj);
346 gtk_adjustment_set_value (plane->priv->s_adj, s);
347 gtk_adjustment_set_value (plane->priv->v_adj, v);
351 gtk_widget_error_bell (GTK_WIDGET (plane));
355 sv_key_press (GtkWidget *widget,
358 GtkColorPlane *plane = GTK_COLOR_PLANE (widget);
361 /* FIXME: turn into bindings */
362 if ((event->state & GDK_MOD1_MASK) != 0)
367 if (event->keyval == GDK_KEY_Up ||
368 event->keyval == GDK_KEY_KP_Up)
369 sv_move (plane, step, 0);
370 else if (event->keyval == GDK_KEY_Down ||
371 event->keyval == GDK_KEY_KP_Down)
372 sv_move (plane, -step, 0);
373 else if (event->keyval == GDK_KEY_Left ||
374 event->keyval == GDK_KEY_KP_Left)
375 sv_move (plane, 0, -step);
376 else if (event->keyval == GDK_KEY_Right ||
377 event->keyval == GDK_KEY_KP_Right)
378 sv_move (plane, 0, step);
380 return GTK_WIDGET_CLASS (gtk_color_plane_parent_class)->key_press_event (widget, event);
386 gtk_color_plane_init (GtkColorPlane *plane)
388 plane->priv = G_TYPE_INSTANCE_GET_PRIVATE (plane,
389 GTK_TYPE_COLOR_PLANE,
390 GtkColorPlanePrivate);
391 gtk_widget_set_can_focus (GTK_WIDGET (plane), TRUE);
392 gtk_widget_set_events (GTK_WIDGET (plane), GDK_KEY_PRESS_MASK
393 | GDK_BUTTON_PRESS_MASK
394 | GDK_BUTTON_RELEASE_MASK
395 | GDK_POINTER_MOTION_MASK);
399 sv_finalize (GObject *object)
401 GtkColorPlane *plane = GTK_COLOR_PLANE (object);
403 cairo_surface_destroy (plane->priv->surface);
404 g_clear_object (&plane->priv->h_adj);
405 g_clear_object (&plane->priv->s_adj);
406 g_clear_object (&plane->priv->v_adj);
408 G_OBJECT_CLASS (gtk_color_plane_parent_class)->finalize (object);
412 gtk_color_plane_class_init (GtkColorPlaneClass *class)
414 GObjectClass *object_class = G_OBJECT_CLASS (class);
415 GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (class);
417 object_class->finalize = sv_finalize;
419 widget_class->draw = sv_draw;
420 widget_class->configure_event = sv_configure;
421 widget_class->button_press_event = sv_button_press;
422 widget_class->button_release_event = sv_button_release;
423 widget_class->motion_notify_event = sv_motion;
424 widget_class->grab_broken_event = sv_grab_broken;
425 widget_class->key_press_event = sv_key_press;
427 g_type_class_add_private (class, sizeof (GtkColorPlanePrivate));
431 gtk_color_plane_new (GtkAdjustment *h_adj,
432 GtkAdjustment *s_adj,
433 GtkAdjustment *v_adj)
435 GtkColorPlane *plane;
437 plane = (GtkColorPlane *) g_object_new (GTK_TYPE_COLOR_PLANE, NULL);
440 plane->priv->h_adj = g_object_ref_sink (h_adj);
441 plane->priv->s_adj = g_object_ref_sink (s_adj);
442 plane->priv->v_adj = g_object_ref_sink (v_adj);
443 g_signal_connect_swapped (plane->priv->h_adj, "value-changed",
444 G_CALLBACK (h_changed), plane);
445 g_signal_connect_swapped (plane->priv->s_adj, "value-changed",
446 G_CALLBACK (sv_changed), plane);
447 g_signal_connect_swapped (plane->priv->v_adj, "value-changed",
448 G_CALLBACK (sv_changed), plane);
450 return (GtkWidget *)plane;