client/gui-gtk-3.0/gtkpixcomm.c

   1 /* GTK - The GIMP Toolkit
   2  * Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
   3  *
   4  * Insensitive pixcomm building code by Eckehard Berns from GNOME Stock
   5  * Copyright (C) 1997, 1998 Free Software Foundation
   6  *
   7  * This library is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU Library General Public
   9  * License as published by the Free Software Foundation; either
  10  * version 2 of the License, or (at your option) any later version.
  11  *
  12  * This library is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * Library General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU Library General Public
  18  * License along with this library; if not, write to the
  19  * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  20  * Boston, MA 02111-1307, USA.
  21  */
  22
  23 /*
  24  * Modified by the GTK+ Team and others 1997-2000.  See the AUTHORS
  25  * file for a list of people on the GTK+ Team.  See the ChangeLog
  26  * files for a list of changes.  These files are distributed with
  27  * GTK+ at ftp://ftp.gtk.org/pub/gtk/.
  28  */
  29
  30 /*
  31  * Based code for GtkPixcomm off GtkImage from the standard GTK+ distribution.
  32  * This widget will have a built-in X window for capturing "click" events, so
  33  * that we no longer need to insert it inside a GtkEventBox. -vasc
  34  */
  35
  36 #ifdef HAVE_CONFIG_H
  37 #include <fc_config.h>
  38 #endif
  39
  40 #include <math.h>
  41
  42 #include <gtk/gtk.h>
  43
  44 /* gui-gtk-3.0 */
  45 #include "gui_main.h"
  46 #include "sprite.h"
  47
  48 #include "gtkpixcomm.h"
  49
  50 static gboolean gtk_pixcomm_draw(GtkWidget *widget, cairo_t *cr);
  51 static void gtk_pixcomm_destroy(GtkWidget *object);
  52 static void
  53 gtk_pixcomm_get_preferred_width(GtkWidget *widget, gint *minimal_width,
  54                                 gint *natural_width);
  55 static void
  56 gtk_pixcomm_get_preferred_height(GtkWidget *widget, gint *minimal_height,
  57                                  gint *natural_height);
  58
  59 static GtkWidgetClass *parent_class;
  60
  61 typedef struct _GtkPixcommPrivate GtkPixcommPrivate;
  62 struct _GtkPixcommPrivate
  63 {
  64   cairo_surface_t *surface;
  65 };
  66
  67 #define GTK_PIXCOMM_GET_PRIVATE(obj) (G_TYPE_INSTANCE_GET_PRIVATE ((obj), GTK_TYPE_PIXCOMM, GtkPixcommPrivate))
  68
  69 G_DEFINE_TYPE (GtkPixcomm, gtk_pixcomm, GTK_TYPE_WIDGET)
  70
  71 /***************************************************************************
  72   Initialize pixcomm class
  73 ***************************************************************************/
  74 static void
  75 gtk_pixcomm_class_init(GtkPixcommClass *klass)
  76 {
  77   GtkWidgetClass *widget_class = GTK_WIDGET_CLASS(klass);
  78
  79   parent_class = g_type_class_peek_parent(klass);
  80
  81   widget_class->destroy = gtk_pixcomm_destroy;
  82   widget_class->draw = gtk_pixcomm_draw;
  83   widget_class->get_preferred_width = gtk_pixcomm_get_preferred_width;
  84   widget_class->get_preferred_height = gtk_pixcomm_get_preferred_height;
  85   g_type_class_add_private (widget_class, sizeof(GtkPixcommPrivate));
  86 }
  87
  88 /***************************************************************************
  89   Initialize pixcomm instance
  90 ***************************************************************************/
  91 static void
  92 gtk_pixcomm_init(GtkPixcomm *pixcomm)
  93 {
  94   GtkPixcommPrivate *priv = GTK_PIXCOMM_GET_PRIVATE(pixcomm);
  95   gtk_widget_set_has_window(GTK_WIDGET(pixcomm), FALSE);
  96
  97   priv->surface = NULL;
  98 }
  99
 100 /***************************************************************************
 101   Destroy pixcomm instance
 102 ***************************************************************************/
 103 static void gtk_pixcomm_destroy(GtkWidget *object)
 104 {
 105   GtkPixcomm *p = GTK_PIXCOMM(object);
 106   GtkPixcommPrivate *priv = GTK_PIXCOMM_GET_PRIVATE(p);
 107
 108   g_object_freeze_notify(G_OBJECT(p));
 109
 110   cairo_surface_destroy(priv->surface);
 111   priv->surface = NULL;
 112
 113   g_object_thaw_notify(G_OBJECT(p));
 114
 115   if (GTK_WIDGET_CLASS(parent_class)->destroy) {
 116     (*GTK_WIDGET_CLASS(parent_class)->destroy)(object);
 117   }
 118 }
 119
 120 /***************************************************************************
 121   Create new pixcomm instance
 122 ***************************************************************************/
 123 GtkWidget*
 124 gtk_pixcomm_new(gint width, gint height)
 125 {
 126   GtkPixcomm *p;
 127   GtkPixcommPrivate *priv;
 128   cairo_t *cr;
 129   int start_pad;
 130   int end_pad;
 131   int top_pad;
 132   int bottom_pad;
 133
 134   p = g_object_new(gtk_pixcomm_get_type(), NULL);
 135   priv = GTK_PIXCOMM_GET_PRIVATE(p);
 136   p->w = width; p->h = height;
 137   start_pad = gtk_widget_get_margin_left(GTK_WIDGET(p));
 138   end_pad = gtk_widget_get_margin_right(GTK_WIDGET(p));
 139   top_pad = gtk_widget_get_margin_top(GTK_WIDGET(p));
 140   bottom_pad = gtk_widget_get_margin_bottom(GTK_WIDGET(p));
 141   gtk_widget_set_size_request(GTK_WIDGET(p), width + start_pad + end_pad,
 142                               height + top_pad + bottom_pad);
 143   gtk_widget_set_halign(GTK_WIDGET(p), GTK_ALIGN_CENTER);
 144   gtk_widget_set_valign(GTK_WIDGET(p), GTK_ALIGN_CENTER);
 145
 146   p->is_scaled = FALSE;
 147   p->scale = 1.0;
 148
 149   priv->surface = cairo_image_surface_create(CAIRO_FORMAT_ARGB32, width, height);
 150   cr = cairo_create(priv->surface);
 151   cairo_set_operator(cr, CAIRO_OPERATOR_CLEAR);
 152   cairo_paint(cr);
 153   cairo_destroy(cr);
 154
 155   return GTK_WIDGET(p);
 156 }
 157
 158 /****************************************************************************
 159   Set the scaling on the pixcomm.  All operations drawn on the pixcomm
 160   (before or after this function is called) will simply be scaled
 161   by this amount.
 162 ****************************************************************************/
 163 void gtk_pixcomm_set_scale(GtkPixcomm *pixcomm, gdouble scale)
 164 {
 165   fc_assert_ret(GTK_IS_PIXCOMM(pixcomm));
 166   fc_assert_ret(scale > 0.0);
 167
 168   if (scale == 1.0) {
 169     pixcomm->is_scaled = FALSE;
 170     pixcomm->scale = 1.0;
 171   } else {
 172     pixcomm->is_scaled = TRUE;
 173     pixcomm->scale = scale;
 174   }
 175 }
 176
 177 /***************************************************************************
 178   Get cairo surface from pixcomm.
 179 ***************************************************************************/
 180 cairo_surface_t *gtk_pixcomm_get_surface(GtkPixcomm *pixcomm)
 181 {
 182   fc_assert_ret_val(GTK_IS_PIXCOMM(pixcomm), NULL);
 183   return GTK_PIXCOMM_GET_PRIVATE(pixcomm)->surface;
 184 }
 185
 186 /***************************************************************************
 187   Clear pixcomm
 188 ***************************************************************************/
 189 void
 190 gtk_pixcomm_clear(GtkPixcomm *p)
 191 {
 192   fc_assert_ret(GTK_IS_PIXCOMM(p));
 193   GtkPixcommPrivate *priv = GTK_PIXCOMM_GET_PRIVATE(p);
 194
 195   cairo_t *cr = cairo_create(priv->surface);
 196   cairo_set_operator(cr, CAIRO_OPERATOR_CLEAR);
 197   cairo_paint(cr);
 198   cairo_destroy(cr);
 199   gtk_widget_queue_draw(GTK_WIDGET(p));
 200 }
 201
 202 /***************************************************************************
 203   Copy sprite to pixcomm
 204 ***************************************************************************/
 205 void gtk_pixcomm_copyto(GtkPixcomm *p, struct sprite *src, gint x, gint y)
 206 {
 207   GtkPixcommPrivate *priv = GTK_PIXCOMM_GET_PRIVATE(p);
 208   int width, height;
 209   GtkAllocation allocation;
 210   cairo_t *cr = cairo_create(priv->surface);
 211   int start_pad;
 212   int top_pad;
 213
 214   start_pad = gtk_widget_get_margin_left(GTK_WIDGET(p));
 215   top_pad = gtk_widget_get_margin_top(GTK_WIDGET(p));
 216   gtk_widget_get_allocation(GTK_WIDGET(p), &allocation);
 217
 218   fc_assert_ret(GTK_IS_PIXCOMM(p));
 219   fc_assert_ret(src != NULL);
 220
 221   get_sprite_dimensions(src, &width, &height);
 222   cairo_rectangle(cr, x, y, width, height);
 223   cairo_set_source_surface(cr, src->surface, x, y);
 224   cairo_paint(cr);
 225   cairo_destroy(cr);
 226   gtk_widget_queue_draw_area(GTK_WIDGET(p),
 227                              allocation.x + x + start_pad,
 228                              allocation.y + y + top_pad,
 229                              width, height);
 230 }
 231
 232 /***************************************************************************
 233   Draw pixcomm
 234 ***************************************************************************/
 235 static gboolean gtk_pixcomm_draw(GtkWidget *widget, cairo_t *cr)
 236 {
 237   GtkPixcommPrivate *priv;
 238   GtkPixcomm *p;
 239   gint start_pad;
 240   gint top_pad;
 241
 242   fc_assert_ret_val(GTK_IS_PIXCOMM(widget), FALSE);
 243
 244   priv = GTK_PIXCOMM_GET_PRIVATE(GTK_PIXCOMM(widget));
 245
 246   p = GTK_PIXCOMM(widget);
 247   start_pad = gtk_widget_get_margin_left(widget);
 248   top_pad = gtk_widget_get_margin_top(widget);
 249
 250   cairo_translate(cr, start_pad, top_pad);
 251
 252   if (p->is_scaled) {
 253     cairo_scale(cr, p->scale, p->scale);
 254   }
 255   cairo_set_source_surface(cr, priv->surface, 0, 0);
 256   cairo_paint(cr);
 257
 258   return FALSE;
 259 }
 260
 261 /***************************************************************************
 262   Get width pixcomm uses.
 263 ***************************************************************************/
 264 static void
 265 gtk_pixcomm_get_preferred_width(GtkWidget *widget, gint *minimal_width,
 266                                 gint *natural_width)
 267 {
 268   int start_pad;
 269   int end_pad;
 270
 271   start_pad = gtk_widget_get_margin_left(widget);
 272   end_pad = gtk_widget_get_margin_right(widget);
 273   *minimal_width = *natural_width = GTK_PIXCOMM(widget)->w + start_pad + end_pad;
 274 }
 275
 276 /***************************************************************************
 277   Get height pixcomm uses.
 278 ***************************************************************************/
 279 static void
 280 gtk_pixcomm_get_preferred_height(GtkWidget *widget, gint *minimal_height,
 281                                  gint *natural_height)
 282 {
 283   int top_pad;
 284   int bottom_pad;
 285
 286   top_pad = gtk_widget_get_margin_top(widget);
 287   bottom_pad = gtk_widget_get_margin_bottom(widget);
 288   *minimal_height = *natural_height = GTK_PIXCOMM(widget)->h + top_pad + bottom_pad;
 289 }
 290
 291 /***************************************************************************
 292   Create new gtkpixcomm from sprite.
 293 ***************************************************************************/
 294 GtkWidget *gtk_pixcomm_new_from_sprite(struct sprite *sprite)
 295 {
 296   GtkPixcomm *p;
 297   GtkPixcommPrivate *priv;
 298   cairo_t *cr;
 299   int start_pad;
 300   int end_pad;
 301   int top_pad;
 302   int bottom_pad;
 303
 304   p = g_object_new(gtk_pixcomm_get_type(), NULL);
 305   priv = GTK_PIXCOMM_GET_PRIVATE(p);
 306   get_sprite_dimensions(sprite, &p->w, &p->h);
 307   start_pad = gtk_widget_get_margin_left(GTK_WIDGET(p));
 308   end_pad = gtk_widget_get_margin_right(GTK_WIDGET(p));
 309   top_pad = gtk_widget_get_margin_top(GTK_WIDGET(p));
 310   bottom_pad = gtk_widget_get_margin_bottom(GTK_WIDGET(p));
 311   gtk_widget_set_size_request(GTK_WIDGET(p), p->w + start_pad + end_pad,
 312                               p->h + top_pad + bottom_pad);
 313   gtk_widget_set_halign(GTK_WIDGET(p), GTK_ALIGN_CENTER);
 314   gtk_widget_set_valign(GTK_WIDGET(p), GTK_ALIGN_CENTER);
 315
 316   p->is_scaled = FALSE;
 317   p->scale = 1.0;
 318
 319   priv->surface = cairo_image_surface_create(CAIRO_FORMAT_ARGB32, p->w, p->h);
 320   cr = cairo_create(priv->surface);
 321   cairo_set_operator(cr, CAIRO_OPERATOR_SOURCE);
 322   cairo_set_source_surface(cr, sprite->surface, 0, 0);
 323   cairo_paint(cr);
 324   cairo_destroy(cr);
 325
 326   return GTK_WIDGET(p);
 327 }
 328
 329 /***************************************************************************
 330   Draw sprite to gtkpixcomm. Grkpixcomm dimensions may change.
 331 ***************************************************************************/
 332 void gtk_pixcomm_set_from_sprite(GtkPixcomm *p, struct sprite *sprite)
 333 {
 334   GtkPixcommPrivate *priv;
 335   cairo_t *cr;
 336   int width, height;
 337   get_sprite_dimensions(sprite, &width, &height);
 338   priv = GTK_PIXCOMM_GET_PRIVATE(p);
 339
 340   cairo_surface_destroy(priv->surface);
 341   priv->surface = cairo_image_surface_create(CAIRO_FORMAT_ARGB32, width, height);
 342   cr = cairo_create(priv->surface);
 343   cairo_set_operator(cr, CAIRO_OPERATOR_SOURCE);
 344   cairo_set_source_surface(cr, sprite->surface, 0, 0);
 345   cairo_paint(cr);
 346   cairo_destroy(cr);
 347   p->w = width;
 348   p->h = height;
 349   gtk_widget_queue_resize(GTK_WIDGET(p));
 350 }