1 /* GTK - The GIMP Toolkit
2 * Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
4 * This library is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Library 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 * Library General Public License for more details.
14 * You should have received a copy of the GNU Library 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 /* Backing pixmap for drawing area */
25 static GdkPixmap *pixmap = NULL;
27 /* Information about cursor */
29 static gint need_cursor = FALSE;
30 static gint cursor_proximity = TRUE;
31 static gdouble cursor_x;
32 static gdouble cursor_y;
34 /* Unique ID of current device */
35 static guint32 current_device = GDK_CORE_POINTER;
37 /* Check to see if we need to draw a cursor for current device */
43 /* gdk_input_list_devices returns an internal list, so we shouldn't
45 tmp_list = gdk_input_list_devices();
49 GdkDeviceInfo *info = (GdkDeviceInfo *)tmp_list->data;
51 if (info->deviceid == current_device)
53 need_cursor = !info->has_cursor;
57 tmp_list = tmp_list->next;
61 /* Erase the old cursor, and/or draw a new one, if necessary */
63 update_cursor (GtkWidget *widget, gdouble x, gdouble y)
65 static gint cursor_present = 0;
66 gint state = need_cursor && cursor_proximity;
70 if (cursor_present && (cursor_present != state ||
71 x != cursor_x || y != cursor_y))
73 gdk_draw_pixmap(widget->window,
74 widget->style->fg_gc[GTK_WIDGET_STATE (widget)],
76 cursor_x - 5, cursor_y - 5,
77 cursor_x - 5, cursor_y - 5,
81 cursor_present = state;
87 gdk_draw_rectangle (widget->window,
88 widget->style->black_gc,
90 cursor_x - 5, cursor_y -5,
96 /* Create a new backing pixmap of the appropriate size */
98 configure_event (GtkWidget *widget, GdkEventConfigure *event)
101 gdk_pixmap_unref (pixmap);
102 pixmap = gdk_pixmap_new(widget->window,
103 widget->allocation.width,
104 widget->allocation.height,
106 gdk_draw_rectangle (pixmap,
107 widget->style->white_gc,
110 widget->allocation.width,
111 widget->allocation.height);
116 /* Refill the screen from the backing pixmap */
118 expose_event (GtkWidget *widget, GdkEventExpose *event)
120 gdk_draw_pixmap(widget->window,
121 widget->style->fg_gc[GTK_WIDGET_STATE (widget)],
123 event->area.x, event->area.y,
124 event->area.x, event->area.y,
125 event->area.width, event->area.height);
130 /* Draw a rectangle on the screen, size depending on pressure,
131 and color on the type of device */
133 draw_brush (GtkWidget *widget, GdkInputSource source,
134 gdouble x, gdouble y, gdouble pressure)
137 GdkRectangle update_rect;
141 case GDK_SOURCE_MOUSE:
142 gc = widget->style->dark_gc[GTK_WIDGET_STATE (widget)];
145 gc = widget->style->black_gc;
147 case GDK_SOURCE_ERASER:
148 gc = widget->style->white_gc;
151 gc = widget->style->light_gc[GTK_WIDGET_STATE (widget)];
154 update_rect.x = x - 10 * pressure;
155 update_rect.y = y - 10 * pressure;
156 update_rect.width = 20 * pressure;
157 update_rect.height = 20 * pressure;
158 gdk_draw_rectangle (pixmap, gc, TRUE,
159 update_rect.x, update_rect.y,
160 update_rect.width, update_rect.height);
161 gtk_widget_draw (widget, &update_rect);
164 static guint32 motion_time;
167 button_press_event (GtkWidget *widget, GdkEventButton *event)
169 if (event->deviceid != current_device)
171 current_device = event->deviceid;
175 cursor_proximity = TRUE;
177 if (event->button == 1 && pixmap != NULL)
179 draw_brush (widget, event->source, event->x, event->y,
181 motion_time = event->time;
184 update_cursor (widget, event->x, event->y);
190 key_press_event (GtkWidget *widget, GdkEventKey *event)
192 if ((event->keyval >= 0x20) && (event->keyval <= 0xFF))
193 printf("I got a %c\n", event->keyval);
195 printf("I got some other key\n");
201 motion_notify_event (GtkWidget *widget, GdkEventMotion *event)
203 GdkTimeCoord *coords;
207 if (event->deviceid != current_device)
209 current_device = event->deviceid;
213 cursor_proximity = TRUE;
215 if (event->state & GDK_BUTTON1_MASK && pixmap != NULL)
217 coords = gdk_input_motion_events (event->window, event->deviceid,
218 motion_time, event->time,
220 motion_time = event->time;
223 for (i=0; i<nevents; i++)
224 draw_brush (widget, event->source, coords[i].x, coords[i].y,
231 gdk_input_window_get_pointer (event->window, event->deviceid,
232 NULL, NULL, NULL, NULL, NULL, NULL);
233 draw_brush (widget, event->source, event->x, event->y,
239 gdk_input_window_get_pointer (event->window, event->deviceid,
240 &event->x, &event->y,
241 NULL, NULL, NULL, NULL);
244 update_cursor (widget, event->x, event->y);
249 /* We track the next two events to know when we need to draw a
253 proximity_out_event (GtkWidget *widget, GdkEventProximity *event)
255 cursor_proximity = FALSE;
256 update_cursor (widget, cursor_x, cursor_y);
261 leave_notify_event (GtkWidget *widget, GdkEventCrossing *event)
263 cursor_proximity = FALSE;
264 update_cursor (widget, cursor_x, cursor_y);
269 input_dialog_destroy (GtkWidget *w, gpointer data)
271 *((GtkWidget **)data) = NULL;
275 create_input_dialog (void)
277 static GtkWidget *inputd = NULL;
281 inputd = gtk_input_dialog_new();
283 gtk_signal_connect (GTK_OBJECT(inputd), "destroy",
284 (GtkSignalFunc)input_dialog_destroy, &inputd);
285 gtk_signal_connect_object (GTK_OBJECT(GTK_INPUT_DIALOG(inputd)->close_button),
287 (GtkSignalFunc)gtk_widget_hide,
289 gtk_widget_hide ( GTK_INPUT_DIALOG(inputd)->save_button);
291 gtk_signal_connect (GTK_OBJECT(inputd), "enable_device",
292 (GtkSignalFunc)check_cursor, NULL);
293 gtk_widget_show (inputd);
297 if (!GTK_WIDGET_MAPPED(inputd))
298 gtk_widget_show(inputd);
300 gdk_window_raise(inputd->window);
311 main (int argc, char *argv[])
314 GtkWidget *drawing_area;
319 gtk_init (&argc, &argv);
321 window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
322 gtk_widget_set_name (window, "Test Input");
324 vbox = gtk_vbox_new (FALSE, 0);
325 gtk_container_add (GTK_CONTAINER (window), vbox);
326 gtk_widget_show (vbox);
328 gtk_signal_connect (GTK_OBJECT (window), "destroy",
329 GTK_SIGNAL_FUNC (quit), NULL);
331 /* Create the drawing area */
333 drawing_area = gtk_drawing_area_new ();
334 gtk_drawing_area_size (GTK_DRAWING_AREA (drawing_area), 200, 200);
335 gtk_box_pack_start (GTK_BOX (vbox), drawing_area, TRUE, TRUE, 0);
337 gtk_widget_show (drawing_area);
339 /* Signals used to handle backing pixmap */
341 gtk_signal_connect (GTK_OBJECT (drawing_area), "expose_event",
342 (GtkSignalFunc) expose_event, NULL);
343 gtk_signal_connect (GTK_OBJECT(drawing_area),"configure_event",
344 (GtkSignalFunc) configure_event, NULL);
348 gtk_signal_connect (GTK_OBJECT (drawing_area), "motion_notify_event",
349 (GtkSignalFunc) motion_notify_event, NULL);
350 gtk_signal_connect (GTK_OBJECT (drawing_area), "button_press_event",
351 (GtkSignalFunc) button_press_event, NULL);
352 gtk_signal_connect (GTK_OBJECT (drawing_area), "key_press_event",
353 (GtkSignalFunc) key_press_event, NULL);
355 gtk_signal_connect (GTK_OBJECT (drawing_area), "leave_notify_event",
356 (GtkSignalFunc) leave_notify_event, NULL);
357 gtk_signal_connect (GTK_OBJECT (drawing_area), "proximity_out_event",
358 (GtkSignalFunc) proximity_out_event, NULL);
360 gtk_widget_set_events (drawing_area, GDK_EXPOSURE_MASK
361 | GDK_LEAVE_NOTIFY_MASK
362 | GDK_BUTTON_PRESS_MASK
364 | GDK_POINTER_MOTION_MASK
365 | GDK_POINTER_MOTION_HINT_MASK
366 | GDK_PROXIMITY_OUT_MASK);
368 /* The following call enables tracking and processing of extension
369 events for the drawing area */
370 gtk_widget_set_extension_events (drawing_area, GDK_EXTENSION_EVENTS_ALL);
372 gtk_widget_grab_focus (drawing_area);
374 /* .. And create some buttons */
375 button = gtk_button_new_with_label ("Input Dialog");
376 gtk_box_pack_start (GTK_BOX (vbox), button, FALSE, FALSE, 0);
378 gtk_signal_connect (GTK_OBJECT (button), "clicked",
379 GTK_SIGNAL_FUNC (create_input_dialog), NULL);
380 gtk_widget_show (button);
382 button = gtk_button_new_with_label ("Quit");
383 gtk_box_pack_start (GTK_BOX (vbox), button, FALSE, FALSE, 0);
385 gtk_signal_connect_object (GTK_OBJECT (button), "clicked",
386 GTK_SIGNAL_FUNC (gtk_widget_destroy),
387 GTK_OBJECT (window));
388 gtk_widget_show (button);
390 gtk_widget_show (window);