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.
21 * Modified by the GTK+ Team and others 1997-1999. See the AUTHORS
22 * file for a list of people on the GTK+ Team. See the ChangeLog
23 * files for a list of changes. These files are distributed with
24 * GTK+ at ftp://ftp.gtk.org/pub/gtk/.
30 /* Backing pixmap for drawing area */
32 static GdkPixmap *pixmap = NULL;
34 /* Information about cursor */
36 static gint need_cursor = FALSE;
37 static gint cursor_proximity = TRUE;
38 static gdouble cursor_x;
39 static gdouble cursor_y;
41 /* Unique ID of current device */
42 static guint32 current_device = GDK_CORE_POINTER;
44 /* Check to see if we need to draw a cursor for current device */
50 /* gdk_input_list_devices returns an internal list, so we shouldn't
52 tmp_list = gdk_input_list_devices();
56 GdkDeviceInfo *info = (GdkDeviceInfo *)tmp_list->data;
58 if (info->deviceid == current_device)
60 need_cursor = !info->has_cursor;
64 tmp_list = tmp_list->next;
68 /* Erase the old cursor, and/or draw a new one, if necessary */
70 update_cursor (GtkWidget *widget, gdouble x, gdouble y)
72 static gint cursor_present = 0;
73 gint state = need_cursor && cursor_proximity;
77 if (cursor_present && (cursor_present != state ||
78 x != cursor_x || y != cursor_y))
80 gdk_draw_pixmap(widget->window,
81 widget->style->fg_gc[GTK_WIDGET_STATE (widget)],
83 cursor_x - 5, cursor_y - 5,
84 cursor_x - 5, cursor_y - 5,
88 cursor_present = state;
94 gdk_draw_rectangle (widget->window,
95 widget->style->black_gc,
97 cursor_x - 5, cursor_y -5,
103 /* Create a new backing pixmap of the appropriate size */
105 configure_event (GtkWidget *widget, GdkEventConfigure *event)
108 gdk_pixmap_unref (pixmap);
109 pixmap = gdk_pixmap_new(widget->window,
110 widget->allocation.width,
111 widget->allocation.height,
113 gdk_draw_rectangle (pixmap,
114 widget->style->white_gc,
117 widget->allocation.width,
118 widget->allocation.height);
123 /* Refill the screen from the backing pixmap */
125 expose_event (GtkWidget *widget, GdkEventExpose *event)
127 gdk_draw_pixmap(widget->window,
128 widget->style->fg_gc[GTK_WIDGET_STATE (widget)],
130 event->area.x, event->area.y,
131 event->area.x, event->area.y,
132 event->area.width, event->area.height);
137 /* Draw a rectangle on the screen, size depending on pressure,
138 and color on the type of device */
140 draw_brush (GtkWidget *widget, GdkInputSource source,
141 gdouble x, gdouble y, gdouble pressure)
144 GdkRectangle update_rect;
148 case GDK_SOURCE_MOUSE:
149 gc = widget->style->dark_gc[GTK_WIDGET_STATE (widget)];
152 gc = widget->style->black_gc;
154 case GDK_SOURCE_ERASER:
155 gc = widget->style->white_gc;
158 gc = widget->style->light_gc[GTK_WIDGET_STATE (widget)];
161 update_rect.x = x - 10 * pressure;
162 update_rect.y = y - 10 * pressure;
163 update_rect.width = 20 * pressure;
164 update_rect.height = 20 * pressure;
165 gdk_draw_rectangle (pixmap, gc, TRUE,
166 update_rect.x, update_rect.y,
167 update_rect.width, update_rect.height);
168 gtk_widget_draw (widget, &update_rect);
171 static guint32 motion_time;
174 button_press_event (GtkWidget *widget, GdkEventButton *event)
176 if (event->deviceid != current_device)
178 current_device = event->deviceid;
182 cursor_proximity = TRUE;
184 if (event->button == 1 && pixmap != NULL)
186 draw_brush (widget, event->source, event->x, event->y,
188 motion_time = event->time;
191 update_cursor (widget, event->x, event->y);
197 key_press_event (GtkWidget *widget, GdkEventKey *event)
199 if ((event->keyval >= 0x20) && (event->keyval <= 0xFF))
200 printf("I got a %c\n", event->keyval);
202 printf("I got some other key\n");
208 motion_notify_event (GtkWidget *widget, GdkEventMotion *event)
210 GdkTimeCoord *coords;
214 if (event->deviceid != current_device)
216 current_device = event->deviceid;
220 cursor_proximity = TRUE;
222 if (event->state & GDK_BUTTON1_MASK && pixmap != NULL)
224 coords = gdk_input_motion_events (event->window, event->deviceid,
225 motion_time, event->time,
227 motion_time = event->time;
230 for (i=0; i<nevents; i++)
231 draw_brush (widget, event->source, coords[i].x, coords[i].y,
238 gdk_input_window_get_pointer (event->window, event->deviceid,
239 NULL, NULL, NULL, NULL, NULL, NULL);
240 draw_brush (widget, event->source, event->x, event->y,
246 gdk_input_window_get_pointer (event->window, event->deviceid,
247 &event->x, &event->y,
248 NULL, NULL, NULL, NULL);
251 update_cursor (widget, event->x, event->y);
256 /* We track the next two events to know when we need to draw a
260 proximity_out_event (GtkWidget *widget, GdkEventProximity *event)
262 cursor_proximity = FALSE;
263 update_cursor (widget, cursor_x, cursor_y);
268 leave_notify_event (GtkWidget *widget, GdkEventCrossing *event)
270 cursor_proximity = FALSE;
271 update_cursor (widget, cursor_x, cursor_y);
276 input_dialog_destroy (GtkWidget *w, gpointer data)
278 *((GtkWidget **)data) = NULL;
282 create_input_dialog (void)
284 static GtkWidget *inputd = NULL;
288 inputd = gtk_input_dialog_new();
290 gtk_signal_connect (GTK_OBJECT(inputd), "destroy",
291 (GtkSignalFunc)input_dialog_destroy, &inputd);
292 gtk_signal_connect_object (GTK_OBJECT(GTK_INPUT_DIALOG(inputd)->close_button),
294 (GtkSignalFunc)gtk_widget_hide,
296 gtk_widget_hide ( GTK_INPUT_DIALOG(inputd)->save_button);
298 gtk_signal_connect (GTK_OBJECT(inputd), "enable_device",
299 (GtkSignalFunc)check_cursor, NULL);
300 gtk_widget_show (inputd);
304 if (!GTK_WIDGET_MAPPED(inputd))
305 gtk_widget_show(inputd);
307 gdk_window_raise(inputd->window);
318 main (int argc, char *argv[])
321 GtkWidget *drawing_area;
326 gtk_init (&argc, &argv);
328 window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
329 gtk_widget_set_name (window, "Test Input");
331 vbox = gtk_vbox_new (FALSE, 0);
332 gtk_container_add (GTK_CONTAINER (window), vbox);
333 gtk_widget_show (vbox);
335 gtk_signal_connect (GTK_OBJECT (window), "destroy",
336 GTK_SIGNAL_FUNC (quit), NULL);
338 /* Create the drawing area */
340 drawing_area = gtk_drawing_area_new ();
341 gtk_drawing_area_size (GTK_DRAWING_AREA (drawing_area), 200, 200);
342 gtk_box_pack_start (GTK_BOX (vbox), drawing_area, TRUE, TRUE, 0);
344 gtk_widget_show (drawing_area);
346 /* Signals used to handle backing pixmap */
348 gtk_signal_connect (GTK_OBJECT (drawing_area), "expose_event",
349 (GtkSignalFunc) expose_event, NULL);
350 gtk_signal_connect (GTK_OBJECT(drawing_area),"configure_event",
351 (GtkSignalFunc) configure_event, NULL);
355 gtk_signal_connect (GTK_OBJECT (drawing_area), "motion_notify_event",
356 (GtkSignalFunc) motion_notify_event, NULL);
357 gtk_signal_connect (GTK_OBJECT (drawing_area), "button_press_event",
358 (GtkSignalFunc) button_press_event, NULL);
359 gtk_signal_connect (GTK_OBJECT (drawing_area), "key_press_event",
360 (GtkSignalFunc) key_press_event, NULL);
362 gtk_signal_connect (GTK_OBJECT (drawing_area), "leave_notify_event",
363 (GtkSignalFunc) leave_notify_event, NULL);
364 gtk_signal_connect (GTK_OBJECT (drawing_area), "proximity_out_event",
365 (GtkSignalFunc) proximity_out_event, NULL);
367 gtk_widget_set_events (drawing_area, GDK_EXPOSURE_MASK
368 | GDK_LEAVE_NOTIFY_MASK
369 | GDK_BUTTON_PRESS_MASK
371 | GDK_POINTER_MOTION_MASK
372 | GDK_POINTER_MOTION_HINT_MASK
373 | GDK_PROXIMITY_OUT_MASK);
375 /* The following call enables tracking and processing of extension
376 events for the drawing area */
377 gtk_widget_set_extension_events (drawing_area, GDK_EXTENSION_EVENTS_ALL);
379 GTK_WIDGET_SET_FLAGS (drawing_area, GTK_CAN_FOCUS);
380 gtk_widget_grab_focus (drawing_area);
382 /* .. And create some buttons */
383 button = gtk_button_new_with_label ("Input Dialog");
384 gtk_box_pack_start (GTK_BOX (vbox), button, FALSE, FALSE, 0);
386 gtk_signal_connect (GTK_OBJECT (button), "clicked",
387 GTK_SIGNAL_FUNC (create_input_dialog), NULL);
388 gtk_widget_show (button);
390 button = gtk_button_new_with_label ("Quit");
391 gtk_box_pack_start (GTK_BOX (vbox), button, FALSE, FALSE, 0);
393 gtk_signal_connect_object (GTK_OBJECT (button), "clicked",
394 GTK_SIGNAL_FUNC (gtk_widget_destroy),
395 GTK_OBJECT (window));
396 gtk_widget_show (button);
398 gtk_widget_show (window);