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