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 "gtkaccessible.h"
26 #include "gtkwindow.h"
27 #include "gtkbutton.h"
30 struct _GtkColorPlanePrivate
36 cairo_surface_t *surface;
41 G_DEFINE_TYPE (GtkColorPlane, gtk_color_plane, GTK_TYPE_DRAWING_AREA)
44 sv_draw (GtkWidget *widget,
47 GtkColorPlane *plane = GTK_COLOR_PLANE (widget);
51 cairo_set_source_surface (cr, plane->priv->surface, 0, 0);
56 width = gtk_widget_get_allocated_width (widget);
57 height = gtk_widget_get_allocated_height (widget);
59 cairo_move_to (cr, 0, y + 0.5);
60 cairo_line_to (cr, width, y + 0.5);
62 cairo_move_to (cr, x + 0.5, 0);
63 cairo_line_to (cr, x + 0.5, height);
65 if (gtk_widget_has_visible_focus (widget))
67 cairo_set_line_width (cr, 3.0);
68 cairo_set_source_rgba (cr, 1.0, 1.0, 1.0, 0.6);
69 cairo_stroke_preserve (cr);
71 cairo_set_line_width (cr, 1.0);
72 cairo_set_source_rgba (cr, 0.0, 0.0, 0.0, 0.8);
77 cairo_set_line_width (cr, 1.0);
78 cairo_set_source_rgba (cr, 0.8, 0.8, 0.8, 0.8);
86 create_sv_surface (GtkColorPlane *plane)
88 GtkWidget *widget = GTK_WIDGET (plane);
90 cairo_surface_t *surface;
91 gint width, height, stride;
93 guint red, green, blue;
100 if (!gtk_widget_get_realized (widget))
103 width = gtk_widget_get_allocated_width (widget);
104 height = gtk_widget_get_allocated_height (widget);
106 surface = gdk_window_create_similar_surface (gtk_widget_get_window (widget),
110 if (plane->priv->surface)
111 cairo_surface_destroy (plane->priv->surface);
112 plane->priv->surface = surface;
114 if (width == 1 || height == 1)
117 stride = cairo_format_stride_for_width (CAIRO_FORMAT_RGB24, width);
119 data = g_malloc (height * stride);
121 h = gtk_adjustment_get_value (plane->priv->h_adj);
122 sf = 1.0 / (height - 1);
123 vf = 1.0 / (width - 1);
124 for (y = 0; y < height; y++)
126 s = CLAMP (1.0 - y * sf, 0.0, 1.0);
127 p = data + y * (stride / 4);
128 for (x = 0; x < width; x++)
131 gtk_hsv_to_rgb (h, s, v, &r, &g, &b);
132 red = CLAMP (r * 255, 0, 255);
133 green = CLAMP (g * 255, 0, 255);
134 blue = CLAMP (b * 255, 0, 255);
135 p[x] = (red << 16) | (green << 8) | blue;
139 tmp = cairo_image_surface_create_for_data ((guchar *)data, CAIRO_FORMAT_RGB24,
140 width, height, stride);
141 cr = cairo_create (surface);
143 cairo_set_source_surface (cr, tmp, 0, 0);
147 cairo_surface_destroy (tmp);
152 hsv_to_xy (GtkColorPlane *plane)
157 width = gtk_widget_get_allocated_width (GTK_WIDGET (plane));
158 height = gtk_widget_get_allocated_height (GTK_WIDGET (plane));
160 s = gtk_adjustment_get_value (plane->priv->s_adj);
161 v = gtk_adjustment_get_value (plane->priv->v_adj);
162 plane->priv->x = CLAMP (width * v, 0, width - 1);
163 plane->priv->y = CLAMP (height * (1 - s), 0, height - 1);
167 sv_configure (GtkWidget *widget,
168 GdkEventConfigure *event)
170 GtkColorPlane *plane = GTK_COLOR_PLANE (widget);
172 create_sv_surface (plane);
179 set_cross_grab (GtkWidget *widget,
185 cursor = gdk_cursor_new_for_display (gtk_widget_get_display (GTK_WIDGET (widget)),
187 gdk_device_grab (device,
188 gtk_widget_get_window (widget),
191 GDK_POINTER_MOTION_MASK
192 | GDK_POINTER_MOTION_HINT_MASK
193 | GDK_BUTTON_RELEASE_MASK,
196 g_object_unref (cursor);
200 sv_grab_broken (GtkWidget *widget,
201 GdkEventGrabBroken *event)
203 GtkColorPlane *plane = GTK_COLOR_PLANE (widget);
205 plane->priv->in_drag = FALSE;
211 sv_update_color (GtkColorPlane *plane,
215 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);
225 gtk_widget_queue_draw (widget);
229 sv_button_press (GtkWidget *widget,
230 GdkEventButton *event)
232 GtkColorPlane *plane = GTK_COLOR_PLANE (widget);
234 if (event->button == GDK_BUTTON_SECONDARY)
238 g_signal_emit_by_name (widget, "popup-menu", &handled);
243 if (plane->priv->in_drag || event->button != GDK_BUTTON_PRIMARY)
246 plane->priv->in_drag = TRUE;
247 set_cross_grab (widget, gdk_event_get_device ((GdkEvent*)event), event->time);
248 sv_update_color (plane, event->x, event->y);
249 gtk_widget_grab_focus (widget);
255 sv_button_release (GtkWidget *widget,
256 GdkEventButton *event)
258 GtkColorPlane *plane = GTK_COLOR_PLANE (widget);
260 if (!plane->priv->in_drag || event->button != GDK_BUTTON_PRIMARY)
263 plane->priv->in_drag = FALSE;
265 sv_update_color (plane, event->x, event->y);
266 gdk_device_ungrab (gdk_event_get_device ((GdkEvent *) event), event->time);
272 sv_motion (GtkWidget *widget,
273 GdkEventMotion *event)
275 GtkColorPlane *plane = GTK_COLOR_PLANE (widget);
277 if (!plane->priv->in_drag)
280 gdk_event_request_motions (event);
281 sv_update_color (plane, event->x, event->y);
287 h_changed (GtkColorPlane *plane)
289 create_sv_surface (plane);
290 gtk_widget_queue_draw (GTK_WIDGET (plane));
294 sv_changed (GtkColorPlane *plane)
297 gtk_widget_queue_draw (GTK_WIDGET (plane));
301 sv_move (GtkColorPlane *plane,
307 s = gtk_adjustment_get_value (plane->priv->s_adj);
308 v = gtk_adjustment_get_value (plane->priv->v_adj);
348 gtk_adjustment_set_value (plane->priv->s_adj, s);
349 gtk_adjustment_set_value (plane->priv->v_adj, v);
353 gtk_widget_error_bell (GTK_WIDGET (plane));
357 sv_key_press (GtkWidget *widget,
360 GtkColorPlane *plane = GTK_COLOR_PLANE (widget);
363 /* FIXME: turn into bindings */
364 if ((event->state & GDK_MOD1_MASK) != 0)
369 if (event->keyval == GDK_KEY_Up ||
370 event->keyval == GDK_KEY_KP_Up)
371 sv_move (plane, step, 0);
372 else if (event->keyval == GDK_KEY_Down ||
373 event->keyval == GDK_KEY_KP_Down)
374 sv_move (plane, -step, 0);
375 else if (event->keyval == GDK_KEY_Left ||
376 event->keyval == GDK_KEY_KP_Left)
377 sv_move (plane, 0, -step);
378 else if (event->keyval == GDK_KEY_Right ||
379 event->keyval == GDK_KEY_KP_Right)
380 sv_move (plane, 0, step);
382 return GTK_WIDGET_CLASS (gtk_color_plane_parent_class)->key_press_event (widget, event);
388 gtk_color_plane_init (GtkColorPlane *plane)
392 plane->priv = G_TYPE_INSTANCE_GET_PRIVATE (plane,
393 GTK_TYPE_COLOR_PLANE,
394 GtkColorPlanePrivate);
395 gtk_widget_set_can_focus (GTK_WIDGET (plane), TRUE);
396 gtk_widget_set_events (GTK_WIDGET (plane), GDK_KEY_PRESS_MASK
397 | GDK_BUTTON_PRESS_MASK
398 | GDK_BUTTON_RELEASE_MASK
399 | GDK_POINTER_MOTION_MASK);
401 atk_obj = gtk_widget_get_accessible (GTK_WIDGET (plane));
402 if (GTK_IS_ACCESSIBLE (atk_obj))
404 atk_object_set_name (atk_obj, _("Color Plane"));
405 atk_object_set_role (atk_obj, ATK_ROLE_COLOR_CHOOSER);
410 sv_finalize (GObject *object)
412 GtkColorPlane *plane = GTK_COLOR_PLANE (object);
414 cairo_surface_destroy (plane->priv->surface);
415 g_clear_object (&plane->priv->h_adj);
416 g_clear_object (&plane->priv->s_adj);
417 g_clear_object (&plane->priv->v_adj);
419 G_OBJECT_CLASS (gtk_color_plane_parent_class)->finalize (object);
423 gtk_color_plane_class_init (GtkColorPlaneClass *class)
425 GObjectClass *object_class = G_OBJECT_CLASS (class);
426 GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (class);
428 object_class->finalize = sv_finalize;
430 widget_class->draw = sv_draw;
431 widget_class->configure_event = sv_configure;
432 widget_class->button_press_event = sv_button_press;
433 widget_class->button_release_event = sv_button_release;
434 widget_class->motion_notify_event = sv_motion;
435 widget_class->grab_broken_event = sv_grab_broken;
436 widget_class->key_press_event = sv_key_press;
438 g_type_class_add_private (class, sizeof (GtkColorPlanePrivate));
442 gtk_color_plane_new (GtkAdjustment *h_adj,
443 GtkAdjustment *s_adj,
444 GtkAdjustment *v_adj)
446 GtkColorPlane *plane;
448 plane = (GtkColorPlane *) g_object_new (GTK_TYPE_COLOR_PLANE, NULL);
451 plane->priv->h_adj = g_object_ref_sink (h_adj);
452 plane->priv->s_adj = g_object_ref_sink (s_adj);
453 plane->priv->v_adj = g_object_ref_sink (v_adj);
454 g_signal_connect_swapped (plane->priv->h_adj, "value-changed",
455 G_CALLBACK (h_changed), plane);
456 g_signal_connect_swapped (plane->priv->s_adj, "value-changed",
457 G_CALLBACK (sv_changed), plane);
458 g_signal_connect_swapped (plane->priv->v_adj, "value-changed",
459 G_CALLBACK (sv_changed), plane);
461 return (GtkWidget *)plane;