src/dialogs/eek-preview.cpp

   1 /* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
   2  *
   3  */
   4 /* ***** BEGIN LICENSE BLOCK *****
   5  * Version: MPL 1.1/GPL 2.0/LGPL 2.1
   6  *
   7  * The contents of this file are subject to the Mozilla Public License Version
   8  * 1.1 (the "License"); you may not use this file except in compliance with
   9  * the License. You may obtain a copy of the License at
  10  * http://www.mozilla.org/MPL/
  11  *
  12  * Software distributed under the License is distributed on an "AS IS" basis,
  13  * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
  14  * for the specific language governing rights and limitations under the
  15  * License.
  16  *
  17  * The Original Code is Eek Preview Stuffs.
  18  *
  19  * The Initial Developer of the Original Code is
  20  * Jon A. Cruz.
  21  * Portions created by the Initial Developer are Copyright (C) 2005
  22  * the Initial Developer. All Rights Reserved.
  23  *
  24  * Contributor(s):
  25  *
  26  * Alternatively, the contents of this file may be used under the terms of
  27  * either the GNU General Public License Version 2 or later (the "GPL"), or
  28  * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
  29  * in which case the provisions of the GPL or the LGPL are applicable instead
  30  * of those above. If you wish to allow use of your version of this file only
  31  * under the terms of either the GPL or the LGPL, and not to allow others to
  32  * use your version of this file under the terms of the MPL, indicate your
  33  * decision by deleting the provisions above and replace them with the notice
  34  * and other provisions required by the GPL or the LGPL. If you do not delete
  35  * the provisions above, a recipient may use your version of this file under
  36  * the terms of any one of the MPL, the GPL or the LGPL.
  37  *
  38  * ***** END LICENSE BLOCK ***** */
  39
  40 #include <gtk/gtk.h>
  41 #include "eek-preview.h"
  42
  43 #define PRIME_BUTTON_MAGIC_NUMBER 1
  44
  45 #define FOCUS_PROP_ID 1
  46
  47
  48
  49 static void eek_preview_class_init( EekPreviewClass *klass );
  50 static void eek_preview_init( EekPreview *preview );
  51
  52 static GtkWidgetClass* parent_class = 0;
  53
  54 void eek_preview_set_color( EekPreview* preview, int r, int g, int b )
  55 {
  56     if ( (preview->_r = r)
  57          || (preview->_g = g)
  58          || (preview->_b = b) ) {
  59         preview->_r = r;
  60         preview->_g = g;
  61         preview->_b = b;
  62
  63         gtk_widget_queue_draw(GTK_WIDGET(preview));
  64     }
  65 }
  66
  67
  68 GType eek_preview_get_type(void)
  69 {
  70     static GType preview_type = 0;
  71
  72     if (!preview_type) {
  73       static const GTypeInfo preview_info = {
  74           sizeof( EekPreviewClass ),
  75           NULL, /* base_init */
  76           NULL, /* base_finalize */
  77           (GClassInitFunc)eek_preview_class_init,
  78           NULL, /* class_finalize */
  79           NULL, /* class_data */
  80           sizeof( EekPreview ),
  81           0,    /* n_preallocs */
  82           (GInstanceInitFunc)eek_preview_init,
  83           NULL /* value_table */
  84       };
  85
  86
  87       preview_type = g_type_register_static( GTK_TYPE_DRAWING_AREA, "EekPreview", &preview_info, (GTypeFlags)0 );
  88     }
  89
  90     return preview_type;
  91 }
  92
  93 GtkWidget* eek_preview_area_new(void)
  94 {
  95     return NULL;
  96 }
  97
  98 static void eek_preview_size_request( GtkWidget* widget, GtkRequisition* req )
  99 {
 100     gint width = 0;
 101     gint height = 0;
 102     EekPreview* preview = EEK_PREVIEW(widget);
 103     gboolean worked = gtk_icon_size_lookup( preview->_size, &width, &height );
 104     if ( !worked ) {
 105         width = 16;
 106         height = 16;
 107     }
 108     if ( preview->_view == VIEW_TYPE_LIST ) {
 109         width *= 3;
 110     }
 111     req->width = width;
 112     req->height = height;
 113 }
 114
 115 enum {
 116   CLICKED_SIGNAL,
 117   ALTCLICKED_SIGNAL,
 118   LAST_SIGNAL
 119 };
 120
 121
 122 static guint eek_preview_signals[LAST_SIGNAL] = { 0 };
 123
 124
 125 gboolean eek_preview_expose_event( GtkWidget* widget, GdkEventExpose* event )
 126 {
 127 /*     g_message("Exposed!!!   %s", GTK_WIDGET_HAS_FOCUS(widget) ? "XXX" : "---" ); */
 128     gint insetX = 0;
 129     gint insetY = 0;
 130
 131 /*
 132     gint lower = widget->allocation.width;
 133     lower = (widget->allocation.height < lower) ? widget->allocation.height : lower;
 134     if ( lower > 16 ) {
 135         insetX++;
 136         if ( lower > 18 ) {
 137             insetX++;
 138             if ( lower > 22 ) {
 139                 insetX++;
 140                 if ( lower > 24 ) {
 141                     insetX++;
 142                     if ( lower > 32 ) {
 143                         insetX++;
 144                     }
 145                 }
 146             }
 147         }
 148         insetY = insetX;
 149     }
 150 */
 151
 152     if ( GTK_WIDGET_DRAWABLE( widget ) ) {
 153         GtkStyle* style = gtk_widget_get_style( widget );
 154
 155         if ( insetX > 0 || insetY > 0 ) {
 156             gtk_paint_flat_box( style,
 157                                 widget->window,
 158                                 (GtkStateType)GTK_WIDGET_STATE(widget),
 159                                 GTK_SHADOW_NONE,
 160                                 NULL,
 161                                 widget,
 162                                 NULL,
 163                                 0, 0,
 164                                 widget->allocation.width, widget->allocation.height);
 165         }
 166
 167         GdkGC *gc = gdk_gc_new( widget->window );
 168         EekPreview* preview = EEK_PREVIEW(widget);
 169         GdkColor fg = {0, preview->_r, preview->_g, preview->_b};
 170         gdk_colormap_alloc_color( gdk_colormap_get_system(), &fg, FALSE, TRUE );
 171
 172         gdk_gc_set_foreground( gc, &fg );
 173
 174         gdk_draw_rectangle( widget->window,
 175                             gc,
 176                             TRUE,
 177                             insetX, insetY,
 178                             widget->allocation.width - (insetX * 2), widget->allocation.height - (insetY * 2) );
 179
 180         if ( preview->_linked ) {
 181             /* Draw arrow */
 182             GdkRectangle possible = {insetX, insetY, (widget->allocation.width - (insetX * 2)), (widget->allocation.height - (insetY * 2)) };
 183             GdkRectangle area = {possible.x, possible.y, possible.width / 2, possible.height / 2 };
 184
 185             /* Make it square */
 186             if ( area.width > area.height )
 187                 area.width = area.height;
 188             if ( area.height > area.width )
 189                 area.height = area.width;
 190
 191             /* Center it horizontally */
 192             if ( area.width < possible.width ) {
 193                 int diff = (possible.width - area.width) / 2;
 194                 area.x += diff;
 195             }
 196
 197
 198             if ( preview->_linked & PREVIEW_LINK_IN ) {
 199                 gtk_paint_arrow( style,
 200                                  widget->window,
 201                                  (GtkStateType)widget->state,
 202                                  GTK_SHADOW_ETCHED_IN,
 203                                  NULL, /* clip area.  &area, */
 204                                  widget, /* may be NULL */
 205                                  NULL, /* detail */
 206                                  GTK_ARROW_DOWN,
 207                                  FALSE,
 208                                  area.x, area.y,
 209                                  area.width, area.height
 210                                  );
 211             }
 212
 213             if ( area.height < possible.height ) {
 214                 area.y = possible.y + (possible.height - area.height);
 215             }
 216
 217             if ( preview->_linked & PREVIEW_LINK_OUT ) {
 218                 gtk_paint_arrow( style,
 219                                  widget->window,
 220                                  (GtkStateType)widget->state,
 221                                  GTK_SHADOW_ETCHED_OUT,
 222                                  NULL, /* clip area.  &area, */
 223                                  widget, /* may be NULL */
 224                                  NULL, /* detail */
 225                                  GTK_ARROW_UP,
 226                                  FALSE,
 227                                  area.x, area.y,
 228                                  area.width, area.height
 229                                  );
 230             }
 231         }
 232
 233         if ( GTK_WIDGET_HAS_FOCUS(widget) ) {
 234             gtk_paint_focus( style,
 235                              widget->window,
 236                              GTK_STATE_NORMAL,
 237                              NULL, /* GdkRectangle *area, */
 238                              widget,
 239                              NULL,
 240                              0 + 1, 0 + 1,
 241                              widget->allocation.width - 2, widget->allocation.height - 2 );
 242         }
 243     }
 244
 245
 246     return FALSE;
 247 }
 248
 249
 250 static gboolean eek_preview_enter_cb( GtkWidget* widget, GdkEventCrossing* event )
 251 {
 252     if ( gtk_get_event_widget( (GdkEvent*)event ) == widget ) {
 253         EekPreview* preview = EEK_PREVIEW(widget);
 254         preview->_within = TRUE;
 255         gtk_widget_set_state( widget, preview->_hot ? GTK_STATE_ACTIVE : GTK_STATE_PRELIGHT );
 256     }
 257     return FALSE;
 258 }
 259
 260 static gboolean eek_preview_leave_cb( GtkWidget* widget, GdkEventCrossing* event )
 261 {
 262     if ( gtk_get_event_widget( (GdkEvent*)event ) == widget ) {
 263         EekPreview* preview = EEK_PREVIEW(widget);
 264         preview->_within = FALSE;
 265         gtk_widget_set_state( widget, GTK_STATE_NORMAL );
 266     }
 267     return FALSE;
 268 }
 269
 270 /*
 271 static gboolean eek_preview_focus_in_event( GtkWidget* widget, GdkEventFocus* event )
 272 {
 273     g_message("focus IN");
 274     gboolean blip = parent_class->focus_in_event ? parent_class->focus_in_event(widget, event) : FALSE;
 275     return blip;
 276 }
 277
 278 static gboolean eek_preview_focus_out_event( GtkWidget* widget, GdkEventFocus* event )
 279 {
 280     g_message("focus OUT");
 281     gboolean blip = parent_class->focus_out_event ? parent_class->focus_out_event(widget, event) : FALSE;
 282     return blip;
 283 }
 284 */
 285
 286 static gboolean eek_preview_button_press_cb( GtkWidget* widget, GdkEventButton* event )
 287 {
 288     if ( gtk_get_event_widget( (GdkEvent*)event ) == widget ) {
 289         EekPreview* preview = EEK_PREVIEW(widget);
 290
 291         if ( preview->_takesFocus && !GTK_WIDGET_HAS_FOCUS(widget) ) {
 292             gtk_widget_grab_focus(widget);
 293         }
 294
 295         if ( event->button == PRIME_BUTTON_MAGIC_NUMBER ) {
 296             preview->_hot = TRUE;
 297             if ( preview->_within ) {
 298                 gtk_widget_set_state( widget, GTK_STATE_ACTIVE );
 299             }
 300         }
 301     }
 302
 303     return FALSE;
 304 }
 305
 306 static gboolean eek_preview_button_release_cb( GtkWidget* widget, GdkEventButton* event )
 307 {
 308     if ( gtk_get_event_widget( (GdkEvent*)event ) == widget ) {
 309         EekPreview* preview = EEK_PREVIEW(widget);
 310         preview->_hot = FALSE;
 311         gtk_widget_set_state( widget, GTK_STATE_NORMAL );
 312         if ( preview->_within && event->button == PRIME_BUTTON_MAGIC_NUMBER ) {
 313             gboolean isAlt = (event->state & GDK_SHIFT_MASK) == GDK_SHIFT_MASK;
 314
 315             if ( isAlt ) {
 316                 g_signal_emit( widget, eek_preview_signals[ALTCLICKED_SIGNAL], 0, 2 );
 317             } else {
 318                 g_signal_emit( widget, eek_preview_signals[CLICKED_SIGNAL], 0 );
 319             }
 320         }
 321     }
 322     return FALSE;
 323 }
 324
 325 gboolean eek_preview_key_press_event( GtkWidget* widget, GdkEventKey* event)
 326 {
 327     g_message("TICK");
 328     return FALSE;
 329 }
 330
 331 gboolean eek_preview_key_release_event( GtkWidget* widget, GdkEventKey* event)
 332 {
 333     g_message("tock");
 334     return FALSE;
 335 }
 336
 337 static void eek_preview_get_property( GObject *object,
 338                                       guint property_id,
 339                                       GValue *value,
 340                                       GParamSpec *pspec)
 341 {
 342     GObjectClass* gobjClass = G_OBJECT_CLASS(parent_class);
 343     switch ( property_id ) {
 344         case FOCUS_PROP_ID:
 345         {
 346             EekPreview* preview = EEK_PREVIEW( object );
 347             g_value_set_boolean( value, preview->_takesFocus );
 348         }
 349         break;
 350         default:
 351         {
 352             if ( gobjClass->get_property ) {
 353                 gobjClass->get_property( object, property_id, value, pspec );
 354             }
 355         }
 356     }
 357 }
 358
 359 static void eek_preview_set_property( GObject *object,
 360                                       guint property_id,
 361                                       const GValue *value,
 362                                       GParamSpec *pspec)
 363 {
 364     GObjectClass* gobjClass = G_OBJECT_CLASS(parent_class);
 365     switch ( property_id ) {
 366         case FOCUS_PROP_ID:
 367         {
 368             EekPreview* preview = EEK_PREVIEW( object );
 369             gboolean val = g_value_get_boolean( value );
 370             if ( val != preview->_takesFocus ) {
 371                 preview->_takesFocus = val;
 372             }
 373         }
 374         break;
 375         default:
 376         {
 377             if ( gobjClass->set_property ) {
 378                 gobjClass->set_property( object, property_id, value, pspec );
 379             }
 380         }
 381     }
 382 }
 383
 384
 385 static gboolean eek_preview_popup_menu( GtkWidget* widget )
 386 {
 387 /*     g_message("Do the popup!"); */
 388     gboolean blip = parent_class->popup_menu ? parent_class->popup_menu(widget) : FALSE;
 389     return blip;
 390 }
 391
 392
 393 static void eek_preview_class_init( EekPreviewClass *klass )
 394 {
 395     GObjectClass* gobjClass = G_OBJECT_CLASS(klass);
 396     /*GtkObjectClass* objectClass = (GtkObjectClass*)klass;*/
 397     GtkWidgetClass* widgetClass = (GtkWidgetClass*)klass;
 398
 399     gobjClass->set_property = eek_preview_set_property;
 400     gobjClass->get_property = eek_preview_get_property;
 401
 402     /*objectClass->destroy = eek_preview_destroy;*/
 403
 404     parent_class = (GtkWidgetClass*)g_type_class_peek_parent( klass );
 405
 406     /*widgetClass->map = ;*/
 407     /*widgetClass->unmap = ;*/
 408     /*widgetClass->realize = ;*/
 409     /*widgetClass->unrealize = ;*/
 410     widgetClass->size_request = eek_preview_size_request;
 411     /*widgetClass->size_allocate = ;*/
 412     /*widgetClass->state_changed = ;*/
 413     /*widgetClass->style_set = ;*/
 414     /*widgetClass->grab_notify = ;*/
 415
 416     widgetClass->button_press_event = eek_preview_button_press_cb;
 417     widgetClass->button_release_event = eek_preview_button_release_cb;
 418     /*widgetClass->delete_event = ;*/
 419     /*widgetClass->destroy_event = ;*/
 420     widgetClass->expose_event = eek_preview_expose_event;
 421 /*     widgetClass->key_press_event = eek_preview_key_press_event; */
 422 /*     widgetClass->key_release_event = eek_preview_key_release_event; */
 423     widgetClass->enter_notify_event = eek_preview_enter_cb;
 424     widgetClass->leave_notify_event = eek_preview_leave_cb;
 425     /*widgetClass->configure_event = ;*/
 426     /*widgetClass->focus_in_event = eek_preview_focus_in_event;*/
 427     /*widgetClass->focus_out_event = eek_preview_focus_out_event;*/
 428
 429     /* selection */
 430     /*widgetClass->selection_get = ;*/
 431     /*widgetClass->selection_received = ;*/
 432
 433
 434     /* drag source: */
 435     /*widgetClass->drag_begin = ;*/
 436     /*widgetClass->drag_end = ;*/
 437     /*widgetClass->drag_data_get = ;*/
 438     /*widgetClass->drag_data_delete = ;*/
 439
 440     /* drag target: */
 441     /*widgetClass->drag_leave = ;*/
 442     /*widgetClass->drag_motion = ;*/
 443     /*widgetClass->drag_drop = ;*/
 444     /*widgetClass->drag_data_received = ;*/
 445
 446     /* For keybindings: */
 447     widgetClass->popup_menu = eek_preview_popup_menu;
 448     /*widgetClass->show_help = ;*/
 449
 450     /* Accessibility support: */
 451     /*widgetClass->get_accessible = ;*/
 452     /*widgetClass->screen_changed = ;*/
 453     /*widgetClass->can_activate_accel = ;*/
 454
 455
 456     eek_preview_signals[CLICKED_SIGNAL] =
 457         g_signal_new( "clicked",
 458                       G_TYPE_FROM_CLASS( klass ),
 459                       (GSignalFlags)(G_SIGNAL_RUN_FIRST | G_SIGNAL_ACTION),
 460                       G_STRUCT_OFFSET( EekPreviewClass, clicked ),
 461                       NULL, NULL,
 462                       g_cclosure_marshal_VOID__VOID, G_TYPE_NONE, 0 );
 463
 464     eek_preview_signals[ALTCLICKED_SIGNAL] =
 465         g_signal_new( "alt-clicked",
 466                       G_TYPE_FROM_CLASS( klass ),
 467                       (GSignalFlags)(G_SIGNAL_RUN_FIRST | G_SIGNAL_ACTION),
 468                       G_STRUCT_OFFSET( EekPreviewClass, clicked ),
 469                       NULL, NULL,
 470                       g_cclosure_marshal_VOID__INT, G_TYPE_NONE,
 471                       1, G_TYPE_INT );
 472
 473
 474     g_object_class_install_property( gobjClass,
 475                                      FOCUS_PROP_ID,
 476                                      g_param_spec_boolean(
 477                                          "focus-on-click",
 478                                          NULL,
 479                                          "flag to grab focus when clicked",
 480                                          TRUE,
 481                                          (GParamFlags)(G_PARAM_READWRITE | G_PARAM_CONSTRUCT)
 482                                          )
 483         );
 484 }
 485
 486 void eek_preview_set_linked( EekPreview* splat, LinkType link )
 487 {
 488     link = (LinkType)(link & PREVIEW_LINK_BOTH);
 489     if ( link != (LinkType)splat->_linked ) {
 490         splat->_linked = link;
 491
 492         gtk_widget_queue_draw( GTK_WIDGET(splat) );
 493     }
 494 }
 495
 496 LinkType eek_preview_get_linked( EekPreview* splat )
 497 {
 498     return (LinkType)splat->_linked;
 499 }
 500
 501 gboolean eek_preview_get_focus_on_click( EekPreview* preview )
 502 {
 503     return preview->_takesFocus;
 504 }
 505
 506 void eek_preview_set_focus_on_click( EekPreview* preview, gboolean focus_on_click )
 507 {
 508     if ( focus_on_click != preview->_takesFocus ) {
 509         preview->_takesFocus = focus_on_click;
 510     }
 511 }
 512
 513 void eek_preview_set_details( EekPreview* preview, PreviewStyle prevstyle, ViewType view, GtkIconSize size )
 514 {
 515     preview->_prevstyle = prevstyle;
 516     preview->_view = view;
 517     preview->_size = size;
 518
 519     gtk_widget_queue_draw(GTK_WIDGET(preview));
 520 }
 521
 522 static void eek_preview_init( EekPreview *preview )
 523 {
 524     GtkWidget* widg = GTK_WIDGET(preview);
 525     GTK_WIDGET_SET_FLAGS( widg, GTK_CAN_FOCUS );
 526     GTK_WIDGET_SET_FLAGS( widg, GTK_RECEIVES_DEFAULT );
 527
 528     gtk_widget_set_sensitive( widg, TRUE );
 529
 530     gtk_widget_add_events(widg, GDK_BUTTON_PRESS_MASK
 531                           | GDK_BUTTON_RELEASE_MASK
 532                           | GDK_KEY_PRESS_MASK
 533                           | GDK_KEY_RELEASE_MASK
 534                           | GDK_FOCUS_CHANGE_MASK
 535                           | GDK_ENTER_NOTIFY_MASK
 536                           | GDK_LEAVE_NOTIFY_MASK );
 537
 538 /*    gtk_widget_add_events( widg, GDK_ALL_EVENTS_MASK );*/
 539
 540     preview->_r = 0x80;
 541     preview->_g = 0x80;
 542     preview->_b = 0xcc;
 543
 544     preview->_hot = FALSE;
 545     preview->_within = FALSE;
 546     preview->_takesFocus = FALSE;
 547
 548     preview->_prevstyle = PREVIEW_STYLE_ICON;
 549     preview->_view = VIEW_TYPE_LIST;
 550     preview->_size = GTK_ICON_SIZE_BUTTON;
 551
 552 /*
 553     GdkColor color = {0};
 554     color.red = (255 << 8) | 255;
 555
 556     GdkColor whack = {0};
 557     whack.green = (255 << 8) | 255;
 558
 559     gtk_widget_modify_bg( widg, GTK_STATE_NORMAL, &color );
 560     gtk_widget_modify_bg( widg, GTK_STATE_PRELIGHT, &whack );
 561 */
 562
 563 /*   GTK_STATE_ACTIVE, */
 564 /*   GTK_STATE_PRELIGHT, */
 565 /*   GTK_STATE_SELECTED, */
 566 /*   GTK_STATE_INSENSITIVE */
 567
 568   if ( 0 ) {
 569     GdkColor color = {0,0,0,0};
 570
 571     color.red = 0xffff;
 572     color.green = 0;
 573     color.blue = 0xffff;
 574     gdk_colormap_alloc_color( gdk_colormap_get_system(), &color, FALSE, TRUE );
 575     gtk_widget_modify_bg(widg, GTK_STATE_ACTIVE, &color);
 576
 577     color.red = 0;
 578     color.green = 0xffff;
 579     color.blue = 0;
 580     gdk_colormap_alloc_color( gdk_colormap_get_system(), &color, FALSE, TRUE );
 581     gtk_widget_modify_bg(widg, GTK_STATE_SELECTED, &color);
 582
 583     color.red = 0xffff;
 584     color.green = 0;
 585     color.blue = 0;
 586     gdk_colormap_alloc_color( gdk_colormap_get_system(), &color, FALSE, TRUE );
 587     gtk_widget_modify_bg( widg, GTK_STATE_PRELIGHT, &color );
 588   }
 589 }
 590
 591
 592 GtkWidget* eek_preview_new(void)
 593 {
 594     return GTK_WIDGET( g_object_new( EEK_PREVIEW_TYPE, NULL ) );
 595 }
 596