Pileus Git - ~andy/gtk/blob - tests/testinput.c

   1 /* GTK - The GIMP Toolkit
   2  * Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
   3  *
   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.
   8  *
   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.
  13  *
  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.
  18  */
  19
  20 /*
  21  * Modified by the GTK+ Team and others 1997-2000.  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/.
  25  */
  26
  27 #undef GTK_DISABLE_DEPRECATED
  28
  29 #include "config.h"
  30 #include <stdio.h>
  31 #include "gtk/gtk.h"
  32
  33 /* Backing pixmap for drawing area */
  34
  35 static GdkPixmap *pixmap = NULL;
  36
  37 /* Information about cursor */
  38
  39 static gint cursor_proximity = TRUE;
  40 static gdouble cursor_x;
  41 static gdouble cursor_y;
  42
  43 /* Unique ID of current device */
  44 static GdkDevice *current_device;
  45
  46 /* Erase the old cursor, and/or draw a new one, if necessary */
  47 static void
  48 update_cursor (GtkWidget *widget,  gdouble x, gdouble y)
  49 {
  50   static gint cursor_present = 0;
  51   gint state = !current_device->has_cursor && cursor_proximity;
  52
  53   if (pixmap != NULL)
  54     {
  55       if (cursor_present && (cursor_present != state ||
  56                              x != cursor_x || y != cursor_y))
  57         {
  58           gdk_draw_drawable (widget->window,
  59                              widget->style->fg_gc[GTK_WIDGET_STATE (widget)],
  60                              pixmap,
  61                              cursor_x - 5, cursor_y - 5,
  62                              cursor_x - 5, cursor_y - 5,
  63                              10, 10);
  64         }
  65
  66       cursor_present = state;
  67       cursor_x = x;
  68       cursor_y = y;
  69
  70       if (cursor_present)
  71         {
  72           gdk_draw_rectangle (widget->window,
  73                               widget->style->black_gc,
  74                               TRUE,
  75                               cursor_x - 5, cursor_y -5,
  76                               10, 10);
  77         }
  78     }
  79 }
  80
  81 /* Create a new backing pixmap of the appropriate size */
  82 static gint
  83 configure_event (GtkWidget *widget, GdkEventConfigure *event)
  84 {
  85   if (pixmap)
  86     g_object_unref (pixmap);
  87   pixmap = gdk_pixmap_new(widget->window,
  88                           widget->allocation.width,
  89                           widget->allocation.height,
  90                           -1);
  91   gdk_draw_rectangle (pixmap,
  92                       widget->style->white_gc,
  93                       TRUE,
  94                       0, 0,
  95                       widget->allocation.width,
  96                       widget->allocation.height);
  97
  98   return TRUE;
  99 }
 100
 101 /* Refill the screen from the backing pixmap */
 102 static gint
 103 expose_event (GtkWidget *widget, GdkEventExpose *event)
 104 {
 105   gdk_draw_drawable (widget->window,
 106                      widget->style->fg_gc[GTK_WIDGET_STATE (widget)],
 107                      pixmap,
 108                      event->area.x, event->area.y,
 109                      event->area.x, event->area.y,
 110                      event->area.width, event->area.height);
 111
 112   return FALSE;
 113 }
 114
 115 /* Draw a rectangle on the screen, size depending on pressure,
 116    and color on the type of device */
 117 static void
 118 draw_brush (GtkWidget *widget, GdkInputSource source,
 119             gdouble x, gdouble y, gdouble pressure)
 120 {
 121   GdkGC *gc;
 122   GdkRectangle update_rect;
 123
 124   switch (source)
 125     {
 126     case GDK_SOURCE_MOUSE:
 127       gc = widget->style->dark_gc[GTK_WIDGET_STATE (widget)];
 128       break;
 129     case GDK_SOURCE_PEN:
 130       gc = widget->style->black_gc;
 131       break;
 132     case GDK_SOURCE_ERASER:
 133       gc = widget->style->white_gc;
 134       break;
 135     default:
 136       gc = widget->style->light_gc[GTK_WIDGET_STATE (widget)];
 137     }
 138
 139   update_rect.x = x - 10 * pressure;
 140   update_rect.y = y - 10 * pressure;
 141   update_rect.width = 20 * pressure;
 142   update_rect.height = 20 * pressure;
 143   gdk_draw_rectangle (pixmap, gc, TRUE,
 144                       update_rect.x, update_rect.y,
 145                       update_rect.width, update_rect.height);
 146   gtk_widget_queue_draw_area (widget,
 147                               update_rect.x, update_rect.y,
 148                               update_rect.width, update_rect.height);
 149   gdk_window_process_updates (widget->window, TRUE);
 150 }
 151
 152 static guint32 motion_time;
 153
 154 static void
 155 print_axes (GdkDevice *device, gdouble *axes)
 156 {
 157   int i;
 158
 159   if (axes)
 160     {
 161       g_print ("%s ", device->name);
 162
 163       for (i=0; i<device->num_axes; i++)
 164         g_print ("%g ", axes[i]);
 165
 166       g_print ("\n");
 167     }
 168 }
 169
 170 static gint
 171 button_press_event (GtkWidget *widget, GdkEventButton *event)
 172 {
 173   current_device = event->device;
 174   cursor_proximity = TRUE;
 175
 176   if (event->button == 1 && pixmap != NULL)
 177     {
 178       gdouble pressure = 0.5;
 179
 180       print_axes (event->device, event->axes);
 181       gdk_event_get_axis ((GdkEvent *)event, GDK_AXIS_PRESSURE, &pressure);
 182       draw_brush (widget, event->device->source, event->x, event->y, pressure);
 183
 184       motion_time = event->time;
 185     }
 186
 187   update_cursor (widget, event->x, event->y);
 188
 189   return TRUE;
 190 }
 191
 192 static gint
 193 key_press_event (GtkWidget *widget, GdkEventKey *event)
 194 {
 195   if ((event->keyval >= 0x20) && (event->keyval <= 0xFF))
 196     printf("I got a %c\n", event->keyval);
 197   else
 198     printf("I got some other key\n");
 199
 200   return TRUE;
 201 }
 202
 203 static gint
 204 motion_notify_event (GtkWidget *widget, GdkEventMotion *event)
 205 {
 206   GdkTimeCoord **events;
 207   int n_events;
 208   int i;
 209
 210   current_device = event->device;
 211   cursor_proximity = TRUE;
 212
 213   if (event->state & GDK_BUTTON1_MASK && pixmap != NULL)
 214     {
 215       if (gdk_device_get_history (event->device, event->window,
 216                                   motion_time, event->time,
 217                                   &events, &n_events))
 218         {
 219           for (i=0; i<n_events; i++)
 220             {
 221               double x = 0, y = 0, pressure = 0.5;
 222
 223               gdk_device_get_axis (event->device, events[i]->axes, GDK_AXIS_X, &x);
 224               gdk_device_get_axis (event->device, events[i]->axes, GDK_AXIS_Y, &y);
 225               gdk_device_get_axis (event->device, events[i]->axes, GDK_AXIS_PRESSURE, &pressure);
 226               draw_brush (widget,  event->device->source, x, y, pressure);
 227
 228               print_axes (event->device, events[i]->axes);
 229             }
 230           gdk_device_free_history (events, n_events);
 231         }
 232       else
 233         {
 234           double pressure = 0.5;
 235
 236           gdk_event_get_axis ((GdkEvent *)event, GDK_AXIS_PRESSURE, &pressure);
 237
 238           draw_brush (widget,  event->device->source, event->x, event->y, pressure);
 239         }
 240       motion_time = event->time;
 241     }
 242
 243   if (event->is_hint)
 244     gdk_device_get_state (event->device, event->window, NULL, NULL);
 245
 246   print_axes (event->device, event->axes);
 247   update_cursor (widget, event->x, event->y);
 248
 249   return TRUE;
 250 }
 251
 252 /* We track the next two events to know when we need to draw a
 253    cursor */
 254
 255 static gint
 256 proximity_out_event (GtkWidget *widget, GdkEventProximity *event)
 257 {
 258   cursor_proximity = FALSE;
 259   update_cursor (widget, cursor_x, cursor_y);
 260   return TRUE;
 261 }
 262
 263 static gint
 264 leave_notify_event (GtkWidget *widget, GdkEventCrossing *event)
 265 {
 266   cursor_proximity = FALSE;
 267   update_cursor (widget, cursor_x, cursor_y);
 268   return TRUE;
 269 }
 270
 271 void
 272 input_dialog_destroy (GtkWidget *w, gpointer data)
 273 {
 274   *((GtkWidget **)data) = NULL;
 275 }
 276
 277 void
 278 create_input_dialog (void)
 279 {
 280   static GtkWidget *inputd = NULL;
 281
 282   if (!inputd)
 283     {
 284       inputd = gtk_input_dialog_new ();
 285
 286       g_signal_connect (inputd, "destroy",
 287                         G_CALLBACK (input_dialog_destroy), &inputd);
 288       g_signal_connect_swapped (GTK_INPUT_DIALOG (inputd)->close_button,
 289                                 "clicked",
 290                                 G_CALLBACK (gtk_widget_hide),
 291                                 inputd);
 292       gtk_widget_hide (GTK_INPUT_DIALOG (inputd)->save_button);
 293
 294       gtk_widget_show (inputd);
 295     }
 296   else
 297     {
 298       if (!gtk_widget_get_mapped(inputd))
 299         gtk_widget_show(inputd);
 300       else
 301         gdk_window_raise(inputd->window);
 302     }
 303 }
 304
 305 void
 306 quit (void)
 307 {
 308   gtk_main_quit ();
 309 }
 310
 311 int
 312 main (int argc, char *argv[])
 313 {
 314   GtkWidget *window;
 315   GtkWidget *drawing_area;
 316   GtkWidget *vbox;
 317
 318   GtkWidget *button;
 319
 320   gtk_init (&argc, &argv);
 321
 322   current_device = gdk_device_get_core_pointer ();
 323
 324   window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
 325   gtk_widget_set_name (window, "Test Input");
 326
 327   vbox = gtk_vbox_new (FALSE, 0);
 328   gtk_container_add (GTK_CONTAINER (window), vbox);
 329   gtk_widget_show (vbox);
 330
 331   g_signal_connect (window, "destroy",
 332                     G_CALLBACK (quit), NULL);
 333
 334   /* Create the drawing area */
 335
 336   drawing_area = gtk_drawing_area_new ();
 337   gtk_widget_set_size_request (drawing_area, 200, 200);
 338   gtk_box_pack_start (GTK_BOX (vbox), drawing_area, TRUE, TRUE, 0);
 339
 340   gtk_widget_show (drawing_area);
 341
 342   /* Signals used to handle backing pixmap */
 343
 344   g_signal_connect (drawing_area, "expose_event",
 345                     G_CALLBACK (expose_event), NULL);
 346   g_signal_connect (drawing_area, "configure_event",
 347                     G_CALLBACK (configure_event), NULL);
 348
 349   /* Event signals */
 350
 351   g_signal_connect (drawing_area, "motion_notify_event",
 352                     G_CALLBACK (motion_notify_event), NULL);
 353   g_signal_connect (drawing_area, "button_press_event",
 354                     G_CALLBACK (button_press_event), NULL);
 355   g_signal_connect (drawing_area, "key_press_event",
 356                     G_CALLBACK (key_press_event), NULL);
 357
 358   g_signal_connect (drawing_area, "leave_notify_event",
 359                     G_CALLBACK (leave_notify_event), NULL);
 360   g_signal_connect (drawing_area, "proximity_out_event",
 361                     G_CALLBACK (proximity_out_event), NULL);
 362
 363   gtk_widget_set_events (drawing_area, GDK_EXPOSURE_MASK
 364                          | GDK_LEAVE_NOTIFY_MASK
 365                          | GDK_BUTTON_PRESS_MASK
 366                          | GDK_KEY_PRESS_MASK
 367                          | GDK_POINTER_MOTION_MASK
 368                          | GDK_POINTER_MOTION_HINT_MASK
 369                          | GDK_PROXIMITY_OUT_MASK);
 370
 371   /* The following call enables tracking and processing of extension
 372      events for the drawing area */
 373   gtk_widget_set_extension_events (drawing_area, GDK_EXTENSION_EVENTS_ALL);
 374
 375   gtk_widget_set_can_focus (drawing_area, TRUE);
 376   gtk_widget_grab_focus (drawing_area);
 377
 378   /* .. And create some buttons */
 379   button = gtk_button_new_with_label ("Input Dialog");
 380   gtk_box_pack_start (GTK_BOX (vbox), button, FALSE, FALSE, 0);
 381
 382   g_signal_connect (button, "clicked",
 383                     G_CALLBACK (create_input_dialog), NULL);
 384   gtk_widget_show (button);
 385
 386   button = gtk_button_new_with_label ("Quit");
 387   gtk_box_pack_start (GTK_BOX (vbox), button, FALSE, FALSE, 0);
 388
 389   g_signal_connect_swapped (button, "clicked",
 390                             G_CALLBACK (gtk_widget_destroy),
 391                             window);
 392   gtk_widget_show (button);
 393
 394   gtk_widget_show (window);
 395
 396   gtk_main ();
 397
 398   return 0;
 399 }