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.
22 #include "gtkcolorplaneprivate.h"
24 #include "gtkcolorutils.h"
25 #include "gtkaccessible.h"
28 struct _GtkColorPlanePrivate
34 cairo_surface_t *surface;
38 G_DEFINE_TYPE (GtkColorPlane, gtk_color_plane, GTK_TYPE_DRAWING_AREA)
41 sv_to_xy (GtkColorPlane *plane,
48 width = gtk_widget_get_allocated_width (GTK_WIDGET (plane));
49 height = gtk_widget_get_allocated_height (GTK_WIDGET (plane));
51 s = gtk_adjustment_get_value (plane->priv->s_adj);
52 v = gtk_adjustment_get_value (plane->priv->v_adj);
54 *x = CLAMP (width * v, 0, width - 1);
55 *y = CLAMP (height * (1 - s), 0, height - 1);
59 plane_draw (GtkWidget *widget,
62 GtkColorPlane *plane = GTK_COLOR_PLANE (widget);
66 cairo_set_source_surface (cr, plane->priv->surface, 0, 0);
69 sv_to_xy (plane, &x, &y);
70 width = gtk_widget_get_allocated_width (widget);
71 height = gtk_widget_get_allocated_height (widget);
73 cairo_move_to (cr, 0, y + 0.5);
74 cairo_line_to (cr, width, y + 0.5);
76 cairo_move_to (cr, x + 0.5, 0);
77 cairo_line_to (cr, x + 0.5, height);
79 if (gtk_widget_has_visible_focus (widget))
81 cairo_set_line_width (cr, 3.0);
82 cairo_set_source_rgba (cr, 1.0, 1.0, 1.0, 0.6);
83 cairo_stroke_preserve (cr);
85 cairo_set_line_width (cr, 1.0);
86 cairo_set_source_rgba (cr, 0.0, 0.0, 0.0, 0.8);
91 cairo_set_line_width (cr, 1.0);
92 cairo_set_source_rgba (cr, 0.8, 0.8, 0.8, 0.8);
100 create_surface (GtkColorPlane *plane)
102 GtkWidget *widget = GTK_WIDGET (plane);
104 cairo_surface_t *surface;
105 gint width, height, stride;
106 cairo_surface_t *tmp;
107 guint red, green, blue;
114 if (!gtk_widget_get_realized (widget))
117 width = gtk_widget_get_allocated_width (widget);
118 height = gtk_widget_get_allocated_height (widget);
120 surface = gdk_window_create_similar_surface (gtk_widget_get_window (widget),
124 if (plane->priv->surface)
125 cairo_surface_destroy (plane->priv->surface);
126 plane->priv->surface = surface;
128 if (width == 1 || height == 1)
131 stride = cairo_format_stride_for_width (CAIRO_FORMAT_RGB24, width);
133 data = g_malloc (height * stride);
135 h = gtk_adjustment_get_value (plane->priv->h_adj);
136 sf = 1.0 / (height - 1);
137 vf = 1.0 / (width - 1);
138 for (y = 0; y < height; y++)
140 s = CLAMP (1.0 - y * sf, 0.0, 1.0);
141 p = data + y * (stride / 4);
142 for (x = 0; x < width; x++)
145 gtk_hsv_to_rgb (h, s, v, &r, &g, &b);
146 red = CLAMP (r * 255, 0, 255);
147 green = CLAMP (g * 255, 0, 255);
148 blue = CLAMP (b * 255, 0, 255);
149 p[x] = (red << 16) | (green << 8) | blue;
153 tmp = cairo_image_surface_create_for_data ((guchar *)data, CAIRO_FORMAT_RGB24,
154 width, height, stride);
155 cr = cairo_create (surface);
157 cairo_set_source_surface (cr, tmp, 0, 0);
161 cairo_surface_destroy (tmp);
166 plane_configure (GtkWidget *widget,
167 GdkEventConfigure *event)
169 create_surface (GTK_COLOR_PLANE (widget));
174 set_cross_grab (GtkWidget *widget,
180 cursor = gdk_cursor_new_for_display (gtk_widget_get_display (GTK_WIDGET (widget)),
182 gdk_device_grab (device,
183 gtk_widget_get_window (widget),
186 GDK_POINTER_MOTION_MASK
187 | GDK_POINTER_MOTION_HINT_MASK
188 | GDK_BUTTON_RELEASE_MASK,
191 g_object_unref (cursor);
195 plane_grab_broken (GtkWidget *widget,
196 GdkEventGrabBroken *event)
198 GTK_COLOR_PLANE (widget)->priv->in_drag = FALSE;
203 h_changed (GtkColorPlane *plane)
205 create_surface (plane);
206 gtk_widget_queue_draw (GTK_WIDGET (plane));
210 sv_changed (GtkColorPlane *plane)
212 gtk_widget_queue_draw (GTK_WIDGET (plane));
216 update_color (GtkColorPlane *plane,
220 GtkWidget *widget = GTK_WIDGET (plane);
223 s = CLAMP (1 - y * (1.0 / gtk_widget_get_allocated_height (widget)), 0, 1);
224 v = CLAMP (x * (1.0 / gtk_widget_get_allocated_width (widget)), 0, 1);
225 gtk_adjustment_set_value (plane->priv->s_adj, s);
226 gtk_adjustment_set_value (plane->priv->v_adj, v);
228 gtk_widget_queue_draw (widget);
232 plane_button_press (GtkWidget *widget,
233 GdkEventButton *event)
235 GtkColorPlane *plane = GTK_COLOR_PLANE (widget);
237 if (event->button == GDK_BUTTON_SECONDARY)
241 g_signal_emit_by_name (widget, "popup-menu", &handled);
246 if (plane->priv->in_drag || event->button != GDK_BUTTON_PRIMARY)
249 plane->priv->in_drag = TRUE;
250 set_cross_grab (widget, gdk_event_get_device ((GdkEvent*)event), event->time);
251 update_color (plane, event->x, event->y);
252 gtk_widget_grab_focus (widget);
258 plane_button_release (GtkWidget *widget,
259 GdkEventButton *event)
261 GtkColorPlane *plane = GTK_COLOR_PLANE (widget);
263 if (!plane->priv->in_drag || event->button != GDK_BUTTON_PRIMARY)
266 plane->priv->in_drag = FALSE;
268 update_color (plane, event->x, event->y);
269 gdk_device_ungrab (gdk_event_get_device ((GdkEvent *) event), event->time);
275 plane_motion_notify (GtkWidget *widget,
276 GdkEventMotion *event)
278 GtkColorPlane *plane = GTK_COLOR_PLANE (widget);
280 if (!plane->priv->in_drag)
283 gdk_event_request_motions (event);
284 update_color (plane, event->x, event->y);
290 sv_move (GtkColorPlane *plane,
296 s = gtk_adjustment_get_value (plane->priv->s_adj);
297 v = gtk_adjustment_get_value (plane->priv->v_adj);
337 gtk_adjustment_set_value (plane->priv->s_adj, s);
338 gtk_adjustment_set_value (plane->priv->v_adj, v);
342 gtk_widget_error_bell (GTK_WIDGET (plane));
346 plane_key_press (GtkWidget *widget,
349 GtkColorPlane *plane = GTK_COLOR_PLANE (widget);
352 if ((event->state & GDK_MOD1_MASK) != 0)
357 if (event->keyval == GDK_KEY_Up ||
358 event->keyval == GDK_KEY_KP_Up)
359 sv_move (plane, step, 0);
360 else if (event->keyval == GDK_KEY_Down ||
361 event->keyval == GDK_KEY_KP_Down)
362 sv_move (plane, -step, 0);
363 else if (event->keyval == GDK_KEY_Left ||
364 event->keyval == GDK_KEY_KP_Left)
365 sv_move (plane, 0, -step);
366 else if (event->keyval == GDK_KEY_Right ||
367 event->keyval == GDK_KEY_KP_Right)
368 sv_move (plane, 0, step);
370 return GTK_WIDGET_CLASS (gtk_color_plane_parent_class)->key_press_event (widget, event);
376 gtk_color_plane_init (GtkColorPlane *plane)
380 plane->priv = G_TYPE_INSTANCE_GET_PRIVATE (plane,
381 GTK_TYPE_COLOR_PLANE,
382 GtkColorPlanePrivate);
384 gtk_widget_set_can_focus (GTK_WIDGET (plane), TRUE);
385 gtk_widget_set_events (GTK_WIDGET (plane), GDK_KEY_PRESS_MASK
386 | GDK_BUTTON_PRESS_MASK
387 | GDK_BUTTON_RELEASE_MASK
388 | GDK_POINTER_MOTION_MASK);
390 atk_obj = gtk_widget_get_accessible (GTK_WIDGET (plane));
391 if (GTK_IS_ACCESSIBLE (atk_obj))
393 atk_object_set_name (atk_obj, _("Color Plane"));
394 atk_object_set_role (atk_obj, ATK_ROLE_COLOR_CHOOSER);
399 plane_finalize (GObject *object)
401 GtkColorPlane *plane = GTK_COLOR_PLANE (object);
403 if (plane->priv->surface)
404 cairo_surface_destroy (plane->priv->surface);
406 g_clear_object (&plane->priv->h_adj);
407 g_clear_object (&plane->priv->s_adj);
408 g_clear_object (&plane->priv->v_adj);
410 G_OBJECT_CLASS (gtk_color_plane_parent_class)->finalize (object);
414 gtk_color_plane_class_init (GtkColorPlaneClass *class)
416 GObjectClass *object_class = G_OBJECT_CLASS (class);
417 GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (class);
419 object_class->finalize = plane_finalize;
421 widget_class->draw = plane_draw;
422 widget_class->configure_event = plane_configure;
423 widget_class->button_press_event = plane_button_press;
424 widget_class->button_release_event = plane_button_release;
425 widget_class->motion_notify_event = plane_motion_notify;
426 widget_class->grab_broken_event = plane_grab_broken;
427 widget_class->key_press_event = plane_key_press;
429 g_type_class_add_private (class, sizeof (GtkColorPlanePrivate));
433 gtk_color_plane_new (GtkAdjustment *h_adj,
434 GtkAdjustment *s_adj,
435 GtkAdjustment *v_adj)
437 GtkColorPlane *plane;
439 plane = (GtkColorPlane *) g_object_new (GTK_TYPE_COLOR_PLANE, NULL);
441 plane->priv->h_adj = g_object_ref_sink (h_adj);
442 plane->priv->s_adj = g_object_ref_sink (s_adj);
443 plane->priv->v_adj = g_object_ref_sink (v_adj);
444 g_signal_connect_swapped (h_adj, "value-changed", G_CALLBACK (h_changed), plane);
445 g_signal_connect_swapped (s_adj, "value-changed", G_CALLBACK (sv_changed), plane);
446 g_signal_connect_swapped (v_adj, "value-changed", G_CALLBACK (sv_changed), plane);
448 return (GtkWidget *)plane;