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, see <http://www.gnu.org/licenses/>.
20 #include "gtkcolorplaneprivate.h"
22 #include "gtkcolorutils.h"
23 #include "gtkaccessible.h"
26 struct _GtkColorPlanePrivate
32 cairo_surface_t *surface;
36 G_DEFINE_TYPE (GtkColorPlane, gtk_color_plane, GTK_TYPE_DRAWING_AREA)
39 sv_to_xy (GtkColorPlane *plane,
46 width = gtk_widget_get_allocated_width (GTK_WIDGET (plane));
47 height = gtk_widget_get_allocated_height (GTK_WIDGET (plane));
49 s = gtk_adjustment_get_value (plane->priv->s_adj);
50 v = gtk_adjustment_get_value (plane->priv->v_adj);
52 *x = CLAMP (width * v, 0, width - 1);
53 *y = CLAMP (height * (1 - s), 0, height - 1);
57 plane_draw (GtkWidget *widget,
60 GtkColorPlane *plane = GTK_COLOR_PLANE (widget);
64 cairo_set_source_surface (cr, plane->priv->surface, 0, 0);
67 sv_to_xy (plane, &x, &y);
68 width = gtk_widget_get_allocated_width (widget);
69 height = gtk_widget_get_allocated_height (widget);
71 cairo_move_to (cr, 0, y + 0.5);
72 cairo_line_to (cr, width, y + 0.5);
74 cairo_move_to (cr, x + 0.5, 0);
75 cairo_line_to (cr, x + 0.5, height);
77 if (gtk_widget_has_visible_focus (widget))
79 cairo_set_line_width (cr, 3.0);
80 cairo_set_source_rgba (cr, 1.0, 1.0, 1.0, 0.6);
81 cairo_stroke_preserve (cr);
83 cairo_set_line_width (cr, 1.0);
84 cairo_set_source_rgba (cr, 0.0, 0.0, 0.0, 0.8);
89 cairo_set_line_width (cr, 1.0);
90 cairo_set_source_rgba (cr, 0.8, 0.8, 0.8, 0.8);
98 create_surface (GtkColorPlane *plane)
100 GtkWidget *widget = GTK_WIDGET (plane);
102 cairo_surface_t *surface;
103 gint width, height, stride;
104 cairo_surface_t *tmp;
105 guint red, green, blue;
112 if (!gtk_widget_get_realized (widget))
115 width = gtk_widget_get_allocated_width (widget);
116 height = gtk_widget_get_allocated_height (widget);
118 surface = gdk_window_create_similar_surface (gtk_widget_get_window (widget),
122 if (plane->priv->surface)
123 cairo_surface_destroy (plane->priv->surface);
124 plane->priv->surface = surface;
126 if (width == 1 || height == 1)
129 stride = cairo_format_stride_for_width (CAIRO_FORMAT_RGB24, width);
131 data = g_malloc (height * stride);
133 h = gtk_adjustment_get_value (plane->priv->h_adj);
134 sf = 1.0 / (height - 1);
135 vf = 1.0 / (width - 1);
136 for (y = 0; y < height; y++)
138 s = CLAMP (1.0 - y * sf, 0.0, 1.0);
139 p = data + y * (stride / 4);
140 for (x = 0; x < width; x++)
143 gtk_hsv_to_rgb (h, s, v, &r, &g, &b);
144 red = CLAMP (r * 255, 0, 255);
145 green = CLAMP (g * 255, 0, 255);
146 blue = CLAMP (b * 255, 0, 255);
147 p[x] = (red << 16) | (green << 8) | blue;
151 tmp = cairo_image_surface_create_for_data ((guchar *)data, CAIRO_FORMAT_RGB24,
152 width, height, stride);
153 cr = cairo_create (surface);
155 cairo_set_source_surface (cr, tmp, 0, 0);
159 cairo_surface_destroy (tmp);
164 plane_configure (GtkWidget *widget,
165 GdkEventConfigure *event)
167 create_surface (GTK_COLOR_PLANE (widget));
172 set_cross_grab (GtkWidget *widget,
178 cursor = gdk_cursor_new_for_display (gtk_widget_get_display (GTK_WIDGET (widget)),
180 gdk_device_grab (device,
181 gtk_widget_get_window (widget),
184 GDK_POINTER_MOTION_MASK
185 | GDK_POINTER_MOTION_HINT_MASK
186 | GDK_BUTTON_RELEASE_MASK,
189 g_object_unref (cursor);
193 plane_grab_broken (GtkWidget *widget,
194 GdkEventGrabBroken *event)
196 GTK_COLOR_PLANE (widget)->priv->in_drag = FALSE;
201 h_changed (GtkColorPlane *plane)
203 create_surface (plane);
204 gtk_widget_queue_draw (GTK_WIDGET (plane));
208 sv_changed (GtkColorPlane *plane)
210 gtk_widget_queue_draw (GTK_WIDGET (plane));
214 update_color (GtkColorPlane *plane,
218 GtkWidget *widget = GTK_WIDGET (plane);
221 s = CLAMP (1 - y * (1.0 / gtk_widget_get_allocated_height (widget)), 0, 1);
222 v = CLAMP (x * (1.0 / gtk_widget_get_allocated_width (widget)), 0, 1);
223 gtk_adjustment_set_value (plane->priv->s_adj, s);
224 gtk_adjustment_set_value (plane->priv->v_adj, v);
226 gtk_widget_queue_draw (widget);
230 plane_button_press (GtkWidget *widget,
231 GdkEventButton *event)
233 GtkColorPlane *plane = GTK_COLOR_PLANE (widget);
235 if (event->button == GDK_BUTTON_SECONDARY)
239 g_signal_emit_by_name (widget, "popup-menu", &handled);
244 if (plane->priv->in_drag || event->button != GDK_BUTTON_PRIMARY)
247 plane->priv->in_drag = TRUE;
248 set_cross_grab (widget, gdk_event_get_device ((GdkEvent*)event), event->time);
249 update_color (plane, event->x, event->y);
250 gtk_widget_grab_focus (widget);
256 plane_button_release (GtkWidget *widget,
257 GdkEventButton *event)
259 GtkColorPlane *plane = GTK_COLOR_PLANE (widget);
261 if (!plane->priv->in_drag || event->button != GDK_BUTTON_PRIMARY)
264 plane->priv->in_drag = FALSE;
266 update_color (plane, event->x, event->y);
267 gdk_device_ungrab (gdk_event_get_device ((GdkEvent *) event), event->time);
273 plane_motion_notify (GtkWidget *widget,
274 GdkEventMotion *event)
276 GtkColorPlane *plane = GTK_COLOR_PLANE (widget);
278 if (!plane->priv->in_drag)
281 gdk_event_request_motions (event);
282 update_color (plane, event->x, event->y);
288 sv_move (GtkColorPlane *plane,
294 s = gtk_adjustment_get_value (plane->priv->s_adj);
295 v = gtk_adjustment_get_value (plane->priv->v_adj);
335 gtk_adjustment_set_value (plane->priv->s_adj, s);
336 gtk_adjustment_set_value (plane->priv->v_adj, v);
340 gtk_widget_error_bell (GTK_WIDGET (plane));
344 plane_key_press (GtkWidget *widget,
347 GtkColorPlane *plane = GTK_COLOR_PLANE (widget);
350 if ((event->state & GDK_MOD1_MASK) != 0)
355 if (event->keyval == GDK_KEY_Up ||
356 event->keyval == GDK_KEY_KP_Up)
357 sv_move (plane, step, 0);
358 else if (event->keyval == GDK_KEY_Down ||
359 event->keyval == GDK_KEY_KP_Down)
360 sv_move (plane, -step, 0);
361 else if (event->keyval == GDK_KEY_Left ||
362 event->keyval == GDK_KEY_KP_Left)
363 sv_move (plane, 0, -step);
364 else if (event->keyval == GDK_KEY_Right ||
365 event->keyval == GDK_KEY_KP_Right)
366 sv_move (plane, 0, step);
368 return GTK_WIDGET_CLASS (gtk_color_plane_parent_class)->key_press_event (widget, event);
374 gtk_color_plane_init (GtkColorPlane *plane)
378 plane->priv = G_TYPE_INSTANCE_GET_PRIVATE (plane,
379 GTK_TYPE_COLOR_PLANE,
380 GtkColorPlanePrivate);
382 gtk_widget_set_can_focus (GTK_WIDGET (plane), TRUE);
383 gtk_widget_set_events (GTK_WIDGET (plane), GDK_KEY_PRESS_MASK
384 | GDK_BUTTON_PRESS_MASK
385 | GDK_BUTTON_RELEASE_MASK
386 | GDK_POINTER_MOTION_MASK);
388 atk_obj = gtk_widget_get_accessible (GTK_WIDGET (plane));
389 if (GTK_IS_ACCESSIBLE (atk_obj))
391 atk_object_set_name (atk_obj, _("Color Plane"));
392 atk_object_set_role (atk_obj, ATK_ROLE_COLOR_CHOOSER);
397 plane_finalize (GObject *object)
399 GtkColorPlane *plane = GTK_COLOR_PLANE (object);
401 if (plane->priv->surface)
402 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 = plane_finalize;
419 widget_class->draw = plane_draw;
420 widget_class->configure_event = plane_configure;
421 widget_class->button_press_event = plane_button_press;
422 widget_class->button_release_event = plane_button_release;
423 widget_class->motion_notify_event = plane_motion_notify;
424 widget_class->grab_broken_event = plane_grab_broken;
425 widget_class->key_press_event = plane_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);
439 plane->priv->h_adj = g_object_ref_sink (h_adj);
440 plane->priv->s_adj = g_object_ref_sink (s_adj);
441 plane->priv->v_adj = g_object_ref_sink (v_adj);
442 g_signal_connect_swapped (h_adj, "value-changed", G_CALLBACK (h_changed), plane);
443 g_signal_connect_swapped (s_adj, "value-changed", G_CALLBACK (sv_changed), plane);
444 g_signal_connect_swapped (v_adj, "value-changed", G_CALLBACK (sv_changed), plane);
446 return (GtkWidget *)plane;