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