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 "gtkaccessible.h"
23 #include "gtkadjustment.h"
24 #include "gtkcolorutils.h"
27 struct _GtkColorPlanePrivate
33 cairo_surface_t *surface;
37 G_DEFINE_TYPE (GtkColorPlane, gtk_color_plane, GTK_TYPE_DRAWING_AREA)
40 sv_to_xy (GtkColorPlane *plane,
47 width = gtk_widget_get_allocated_width (GTK_WIDGET (plane));
48 height = gtk_widget_get_allocated_height (GTK_WIDGET (plane));
50 s = gtk_adjustment_get_value (plane->priv->s_adj);
51 v = gtk_adjustment_get_value (plane->priv->v_adj);
53 *x = CLAMP (width * v, 0, width - 1);
54 *y = CLAMP (height * (1 - s), 0, height - 1);
58 plane_draw (GtkWidget *widget,
61 GtkColorPlane *plane = GTK_COLOR_PLANE (widget);
65 cairo_set_source_surface (cr, plane->priv->surface, 0, 0);
68 sv_to_xy (plane, &x, &y);
69 width = gtk_widget_get_allocated_width (widget);
70 height = gtk_widget_get_allocated_height (widget);
72 cairo_move_to (cr, 0, y + 0.5);
73 cairo_line_to (cr, width, y + 0.5);
75 cairo_move_to (cr, x + 0.5, 0);
76 cairo_line_to (cr, x + 0.5, height);
78 if (gtk_widget_has_visible_focus (widget))
80 cairo_set_line_width (cr, 3.0);
81 cairo_set_source_rgba (cr, 1.0, 1.0, 1.0, 0.6);
82 cairo_stroke_preserve (cr);
84 cairo_set_line_width (cr, 1.0);
85 cairo_set_source_rgba (cr, 0.0, 0.0, 0.0, 0.8);
90 cairo_set_line_width (cr, 1.0);
91 cairo_set_source_rgba (cr, 0.8, 0.8, 0.8, 0.8);
99 create_surface (GtkColorPlane *plane)
101 GtkWidget *widget = GTK_WIDGET (plane);
103 cairo_surface_t *surface;
104 gint width, height, stride;
105 cairo_surface_t *tmp;
106 guint red, green, blue;
113 if (!gtk_widget_get_realized (widget))
116 width = gtk_widget_get_allocated_width (widget);
117 height = gtk_widget_get_allocated_height (widget);
119 surface = gdk_window_create_similar_surface (gtk_widget_get_window (widget),
123 if (plane->priv->surface)
124 cairo_surface_destroy (plane->priv->surface);
125 plane->priv->surface = surface;
127 if (width == 1 || height == 1)
130 stride = cairo_format_stride_for_width (CAIRO_FORMAT_RGB24, width);
132 data = g_malloc (height * stride);
134 h = gtk_adjustment_get_value (plane->priv->h_adj);
135 sf = 1.0 / (height - 1);
136 vf = 1.0 / (width - 1);
137 for (y = 0; y < height; y++)
139 s = CLAMP (1.0 - y * sf, 0.0, 1.0);
140 p = data + y * (stride / 4);
141 for (x = 0; x < width; x++)
144 gtk_hsv_to_rgb (h, s, v, &r, &g, &b);
145 red = CLAMP (r * 255, 0, 255);
146 green = CLAMP (g * 255, 0, 255);
147 blue = CLAMP (b * 255, 0, 255);
148 p[x] = (red << 16) | (green << 8) | blue;
152 tmp = cairo_image_surface_create_for_data ((guchar *)data, CAIRO_FORMAT_RGB24,
153 width, height, stride);
154 cr = cairo_create (surface);
156 cairo_set_source_surface (cr, tmp, 0, 0);
160 cairo_surface_destroy (tmp);
165 plane_configure (GtkWidget *widget,
166 GdkEventConfigure *event)
168 create_surface (GTK_COLOR_PLANE (widget));
173 set_cross_grab (GtkWidget *widget,
179 cursor = gdk_cursor_new_for_display (gtk_widget_get_display (GTK_WIDGET (widget)),
181 gdk_device_grab (device,
182 gtk_widget_get_window (widget),
185 GDK_POINTER_MOTION_MASK
186 | GDK_POINTER_MOTION_HINT_MASK
187 | GDK_BUTTON_RELEASE_MASK,
190 g_object_unref (cursor);
194 plane_grab_broken (GtkWidget *widget,
195 GdkEventGrabBroken *event)
197 GTK_COLOR_PLANE (widget)->priv->in_drag = FALSE;
202 h_changed (GtkColorPlane *plane)
204 create_surface (plane);
205 gtk_widget_queue_draw (GTK_WIDGET (plane));
209 sv_changed (GtkColorPlane *plane)
211 gtk_widget_queue_draw (GTK_WIDGET (plane));
215 update_color (GtkColorPlane *plane,
219 GtkWidget *widget = GTK_WIDGET (plane);
222 s = CLAMP (1 - y * (1.0 / gtk_widget_get_allocated_height (widget)), 0, 1);
223 v = CLAMP (x * (1.0 / gtk_widget_get_allocated_width (widget)), 0, 1);
224 gtk_adjustment_set_value (plane->priv->s_adj, s);
225 gtk_adjustment_set_value (plane->priv->v_adj, v);
227 gtk_widget_queue_draw (widget);
231 plane_button_press (GtkWidget *widget,
232 GdkEventButton *event)
234 GtkColorPlane *plane = GTK_COLOR_PLANE (widget);
236 if (event->button == GDK_BUTTON_SECONDARY)
240 g_signal_emit_by_name (widget, "popup-menu", &handled);
245 if (plane->priv->in_drag || event->button != GDK_BUTTON_PRIMARY)
248 plane->priv->in_drag = TRUE;
249 set_cross_grab (widget, gdk_event_get_device ((GdkEvent*)event), event->time);
250 update_color (plane, event->x, event->y);
251 gtk_widget_grab_focus (widget);
257 plane_button_release (GtkWidget *widget,
258 GdkEventButton *event)
260 GtkColorPlane *plane = GTK_COLOR_PLANE (widget);
262 if (!plane->priv->in_drag || event->button != GDK_BUTTON_PRIMARY)
265 plane->priv->in_drag = FALSE;
267 update_color (plane, event->x, event->y);
268 gdk_device_ungrab (gdk_event_get_device ((GdkEvent *) event), event->time);
274 plane_motion_notify (GtkWidget *widget,
275 GdkEventMotion *event)
277 GtkColorPlane *plane = GTK_COLOR_PLANE (widget);
279 if (!plane->priv->in_drag)
282 gdk_event_request_motions (event);
283 update_color (plane, event->x, event->y);
289 sv_move (GtkColorPlane *plane,
295 s = gtk_adjustment_get_value (plane->priv->s_adj);
296 v = gtk_adjustment_get_value (plane->priv->v_adj);
336 gtk_adjustment_set_value (plane->priv->s_adj, s);
337 gtk_adjustment_set_value (plane->priv->v_adj, v);
341 gtk_widget_error_bell (GTK_WIDGET (plane));
345 plane_key_press (GtkWidget *widget,
348 GtkColorPlane *plane = GTK_COLOR_PLANE (widget);
351 if ((event->state & GDK_MOD1_MASK) != 0)
356 if (event->keyval == GDK_KEY_Up ||
357 event->keyval == GDK_KEY_KP_Up)
358 sv_move (plane, step, 0);
359 else if (event->keyval == GDK_KEY_Down ||
360 event->keyval == GDK_KEY_KP_Down)
361 sv_move (plane, -step, 0);
362 else if (event->keyval == GDK_KEY_Left ||
363 event->keyval == GDK_KEY_KP_Left)
364 sv_move (plane, 0, -step);
365 else if (event->keyval == GDK_KEY_Right ||
366 event->keyval == GDK_KEY_KP_Right)
367 sv_move (plane, 0, step);
369 return GTK_WIDGET_CLASS (gtk_color_plane_parent_class)->key_press_event (widget, event);
375 gtk_color_plane_init (GtkColorPlane *plane)
379 plane->priv = G_TYPE_INSTANCE_GET_PRIVATE (plane,
380 GTK_TYPE_COLOR_PLANE,
381 GtkColorPlanePrivate);
383 gtk_widget_set_can_focus (GTK_WIDGET (plane), TRUE);
384 gtk_widget_set_events (GTK_WIDGET (plane), GDK_KEY_PRESS_MASK
385 | GDK_BUTTON_PRESS_MASK
386 | GDK_BUTTON_RELEASE_MASK
387 | GDK_POINTER_MOTION_MASK);
389 atk_obj = gtk_widget_get_accessible (GTK_WIDGET (plane));
390 if (GTK_IS_ACCESSIBLE (atk_obj))
392 atk_object_set_name (atk_obj, _("Color Plane"));
393 atk_object_set_role (atk_obj, ATK_ROLE_COLOR_CHOOSER);
398 plane_finalize (GObject *object)
400 GtkColorPlane *plane = GTK_COLOR_PLANE (object);
402 if (plane->priv->surface)
403 cairo_surface_destroy (plane->priv->surface);
405 g_clear_object (&plane->priv->h_adj);
406 g_clear_object (&plane->priv->s_adj);
407 g_clear_object (&plane->priv->v_adj);
409 G_OBJECT_CLASS (gtk_color_plane_parent_class)->finalize (object);
413 gtk_color_plane_class_init (GtkColorPlaneClass *class)
415 GObjectClass *object_class = G_OBJECT_CLASS (class);
416 GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (class);
418 object_class->finalize = plane_finalize;
420 widget_class->draw = plane_draw;
421 widget_class->configure_event = plane_configure;
422 widget_class->button_press_event = plane_button_press;
423 widget_class->button_release_event = plane_button_release;
424 widget_class->motion_notify_event = plane_motion_notify;
425 widget_class->grab_broken_event = plane_grab_broken;
426 widget_class->key_press_event = plane_key_press;
428 g_type_class_add_private (class, sizeof (GtkColorPlanePrivate));
432 gtk_color_plane_new (GtkAdjustment *h_adj,
433 GtkAdjustment *s_adj,
434 GtkAdjustment *v_adj)
436 GtkColorPlane *plane;
438 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 (h_adj, "value-changed", G_CALLBACK (h_changed), plane);
444 g_signal_connect_swapped (s_adj, "value-changed", G_CALLBACK (sv_changed), plane);
445 g_signal_connect_swapped (v_adj, "value-changed", G_CALLBACK (sv_changed), plane);
447 return (GtkWidget *)plane;