src/gtk/dnd.cpp

   1 ///////////////////////////////////////////////////////////////////////////////
   2 // Name:        dnd.cpp
   3 // Purpose:     wxDropTarget class
   4 // Author:      Robert Roebling
   5 // Id:          $Id$
   6 // Copyright:   (c) 1998 Robert Roebling
   7 // Licence:     wxWindows licence
   8 ///////////////////////////////////////////////////////////////////////////////
   9
  10 #ifdef __GNUG__
  11 #pragma implementation "dnd.h"
  12 #endif
  13
  14 #include "wx/dnd.h"
  15 #include "wx/window.h"
  16 #include "wx/app.h"
  17 #include "wx/gdicmn.h"
  18 #include <wx/intl.h>
  19
  20 #include "gdk/gdkprivate.h"
  21
  22 #include <X11/Xlib.h>
  23
  24 // ----------------------------------------------------------------------------
  25 // global
  26 // ----------------------------------------------------------------------------
  27
  28 extern bool g_blockEventsOnDrag;
  29
  30
  31 #if (GTK_MINOR_VERSION == 1)
  32 #if (GTK_MICRO_VERSION >= 3)
  33 #define NEW_GTK_DND_CODE
  34 #endif
  35 #endif
  36
  37 #ifdef NEW_GTK_DND_CODE
  38
  39 wxDropTarget::wxDropTarget()
  40 {
  41 }
  42
  43 wxDropTarget::~wxDropTarget()
  44 {
  45 }
  46
  47 void wxDropTarget::UnregisterWidget( GtkWidget *widget )
  48 {
  49   if (!widget) return;
  50
  51   // TODO
  52 }
  53
  54 void wxDropTarget::RegisterWidget( GtkWidget *widget )
  55 {
  56   if (!widget) return;
  57
  58   wxString formats;
  59   int valid = 0;
  60
  61   for ( size_t i = 0; i < GetFormatCount(); i++ )
  62   {
  63     wxDataFormat df = GetFormat( i );
  64     switch (df)
  65     {
  66       case wxDF_TEXT:
  67         if (i > 0) formats += ";";
  68         formats += "text/plain";
  69         valid++;
  70         break;
  71       case wxDF_FILENAME:
  72         if (i > 0) formats += ";";
  73         formats += "file:ALL";
  74         valid++;
  75         break;
  76       default:
  77         break;
  78     }
  79   }
  80
  81   char *str = WXSTRINGCAST formats;
  82
  83   // TODO
  84 }
  85
  86 // ----------------------------------------------------------------------------
  87 // wxTextDropTarget
  88 // ----------------------------------------------------------------------------
  89
  90 bool wxTextDropTarget::OnDrop( long x, long y, const void *data, size_t WXUNUSED(size) )
  91 {
  92   OnDropText( x, y, (const char*)data );
  93   return TRUE;
  94 }
  95
  96 bool wxTextDropTarget::OnDropText( long x, long y, const char *psz )
  97 {
  98   printf( "Got dropped text: %s.\n", psz );
  99   printf( "At x: %d, y: %d.\n", (int)x, (int)y );
 100   return TRUE;
 101 }
 102
 103 size_t wxTextDropTarget::GetFormatCount() const
 104 {
 105   return 1;
 106 }
 107
 108 wxDataFormat wxTextDropTarget::GetFormat(size_t WXUNUSED(n)) const
 109 {
 110   return wxDF_TEXT;
 111 }
 112
 113 // ----------------------------------------------------------------------------
 114 // wxFileDropTarget
 115 // ----------------------------------------------------------------------------
 116
 117 bool wxFileDropTarget::OnDropFiles( long x, long y, size_t nFiles, const char * const aszFiles[] )
 118 {
 119   printf( "Got %d dropped files.\n", (int)nFiles );
 120   printf( "At x: %d, y: %d.\n", (int)x, (int)y );
 121   for (size_t i = 0; i < nFiles; i++)
 122   {
 123     printf( aszFiles[i] );
 124     printf( "\n" );
 125   }
 126   return TRUE;
 127 }
 128
 129 bool wxFileDropTarget::OnDrop(long x, long y, const void *data, size_t size )
 130 {
 131   size_t number = 0;
 132   char *text = (char*) data;
 133   for (size_t i = 0; i < size; i++)
 134     if (text[i] == 0) number++;
 135
 136   if (number == 0) return TRUE;
 137
 138   char **files = new char*[number];
 139
 140   text = (char*) data;
 141   for (size_t i = 0; i < number; i++)
 142   {
 143     files[i] = text;
 144     int len = strlen( text );
 145     text += len+1;
 146   }
 147
 148   bool ret = OnDropFiles( x, y, 1, files );
 149
 150   free( files );
 151
 152   return ret;
 153 }
 154
 155 size_t wxFileDropTarget::GetFormatCount() const
 156 {
 157   return 1;
 158 }
 159
 160 wxDataFormat wxFileDropTarget::GetFormat(size_t WXUNUSED(n)) const
 161 {
 162   return wxDF_FILENAME;
 163 }
 164
 165 //-------------------------------------------------------------------------
 166 // wxDropSource
 167 //-------------------------------------------------------------------------
 168
 169 wxDropSource::wxDropSource( wxWindow *win )
 170 {
 171   g_blockEventsOnDrag = TRUE;
 172
 173   m_window = win;
 174   m_widget = win->m_widget;
 175   if (win->m_wxwindow) m_widget = win->m_wxwindow;
 176
 177   m_data = (wxDataObject *) NULL;
 178   m_retValue = wxDragCancel;
 179
 180   m_defaultCursor = wxCursor( wxCURSOR_NO_ENTRY );
 181   m_goaheadCursor = wxCursor( wxCURSOR_HAND );
 182 }
 183
 184 wxDropSource::wxDropSource( wxDataObject &data, wxWindow *win )
 185 {
 186   g_blockEventsOnDrag = TRUE;
 187
 188   m_window = win;
 189   m_widget = win->m_widget;
 190   if (win->m_wxwindow) m_widget = win->m_wxwindow;
 191   m_retValue = wxDragCancel;
 192
 193   m_data = &data;
 194
 195   m_defaultCursor = wxCursor( wxCURSOR_NO_ENTRY );
 196   m_goaheadCursor = wxCursor( wxCURSOR_HAND );
 197 }
 198
 199 void wxDropSource::SetData( wxDataObject &data )
 200 {
 201   m_data = &data;
 202 }
 203
 204 wxDropSource::~wxDropSource(void)
 205 {
 206 //  if (m_data) delete m_data;
 207
 208   g_blockEventsOnDrag = FALSE;
 209 }
 210
 211 wxDragResult wxDropSource::DoDragDrop( bool WXUNUSED(bAllowMove) )
 212 {
 213   wxASSERT_MSG( m_data, "wxDragSource: no data" );
 214
 215   if (!m_data) return (wxDragResult) wxDragNone;
 216   if (m_data->GetDataSize() == 0) return (wxDragResult) wxDragNone;
 217
 218   RegisterWindow();
 219
 220   // TODO
 221
 222   UnregisterWindow();
 223
 224   g_blockEventsOnDrag = FALSE;
 225
 226   return m_retValue;
 227 }
 228
 229 void wxDropSource::RegisterWindow(void)
 230 {
 231   if (!m_data) return;
 232
 233   wxString formats;
 234
 235   wxDataFormat df = m_data->GetPreferredFormat();
 236
 237     switch (df)
 238     {
 239       case wxDF_TEXT:
 240         formats += "text/plain";
 241         break;
 242       case wxDF_FILENAME:
 243         formats += "file:ALL";
 244         break;
 245       default:
 246         break;
 247     }
 248
 249   char *str = WXSTRINGCAST formats;
 250
 251   // TODO
 252 }
 253
 254 void wxDropSource::UnregisterWindow(void)
 255 {
 256   if (!m_widget) return;
 257
 258   // TODO
 259 }
 260
 261 #else
 262
 263 // ----------------------------------------------------------------------------
 264 // wxDropTarget
 265 // ----------------------------------------------------------------------------
 266
 267 wxDropTarget::wxDropTarget()
 268 {
 269 }
 270
 271 wxDropTarget::~wxDropTarget()
 272 {
 273 }
 274
 275 void wxDropTarget::UnregisterWidget( GtkWidget *widget )
 276 {
 277   if (!widget) return;
 278
 279   gtk_widget_dnd_drop_set( widget, FALSE, (gchar **) NULL, 0, FALSE );
 280 }
 281
 282 void wxDropTarget::RegisterWidget( GtkWidget *widget )
 283 {
 284   wxString formats;
 285   int valid = 0;
 286
 287   for ( size_t i = 0; i < GetFormatCount(); i++ )
 288   {
 289     wxDataFormat df = GetFormat( i );
 290     switch (df)
 291     {
 292       case wxDF_TEXT:
 293         if (i > 0) formats += ";";
 294         formats += "text/plain";
 295         valid++;
 296         break;
 297       case wxDF_FILENAME:
 298         if (i > 0) formats += ";";
 299         formats += "file:ALL";
 300         valid++;
 301         break;
 302       default:
 303         break;
 304     }
 305   }
 306
 307   char *str = WXSTRINGCAST formats;
 308
 309   gtk_widget_dnd_drop_set( widget, TRUE, &str, valid, FALSE );
 310 }
 311
 312 // ----------------------------------------------------------------------------
 313 // wxTextDropTarget
 314 // ----------------------------------------------------------------------------
 315
 316 bool wxTextDropTarget::OnDrop( long x, long y, const void *data, size_t WXUNUSED(size) )
 317 {
 318   OnDropText( x, y, (const char*)data );
 319   return TRUE;
 320 }
 321
 322 bool wxTextDropTarget::OnDropText( long x, long y, const char *psz )
 323 {
 324   printf( "Got dropped text: %s.\n", psz );
 325   printf( "At x: %d, y: %d.\n", (int)x, (int)y );
 326   return TRUE;
 327 }
 328
 329 size_t wxTextDropTarget::GetFormatCount() const
 330 {
 331   return 1;
 332 }
 333
 334 wxDataFormat wxTextDropTarget::GetFormat(size_t WXUNUSED(n)) const
 335 {
 336   return wxDF_TEXT;
 337 }
 338
 339 // ----------------------------------------------------------------------------
 340 // wxFileDropTarget
 341 // ----------------------------------------------------------------------------
 342
 343 bool wxFileDropTarget::OnDropFiles( long x, long y, size_t nFiles, const char * const aszFiles[] )
 344 {
 345   printf( "Got %d dropped files.\n", (int)nFiles );
 346   printf( "At x: %d, y: %d.\n", (int)x, (int)y );
 347   for (size_t i = 0; i < nFiles; i++)
 348   {
 349     printf( aszFiles[i] );
 350     printf( "\n" );
 351   }
 352   return TRUE;
 353 }
 354
 355 bool wxFileDropTarget::OnDrop(long x, long y, const void *data, size_t size )
 356 {
 357   size_t number = 0;
 358   char *text = (char*) data;
 359   for (size_t i = 0; i < size; i++)
 360     if (text[i] == 0) number++;
 361
 362   if (number == 0) return TRUE;
 363
 364   char **files = new char*[number];
 365
 366   text = (char*) data;
 367   for (size_t i = 0; i < number; i++)
 368   {
 369     files[i] = text;
 370     int len = strlen( text );
 371     text += len+1;
 372   }
 373
 374   bool ret = OnDropFiles( x, y, 1, files );
 375
 376   free( files );
 377
 378   return ret;
 379 }
 380
 381 size_t wxFileDropTarget::GetFormatCount() const
 382 {
 383   return 1;
 384 }
 385
 386 wxDataFormat wxFileDropTarget::GetFormat(size_t WXUNUSED(n)) const
 387 {
 388   return wxDF_FILENAME;
 389 }
 390
 391 //-------------------------------------------------------------------------
 392 // wxDropSource
 393 //-------------------------------------------------------------------------
 394
 395 //-----------------------------------------------------------------------------
 396 // drag request
 397
 398 void gtk_drag_callback( GtkWidget *widget, GdkEvent *event, wxDropSource *source )
 399 {
 400   printf( "Data requested for dropping.\n" );
 401
 402   wxDataObject *data = source->m_data;
 403
 404   size_t size = data->GetDataSize();
 405   char *ptr = new char[size];
 406   data->GetDataHere( ptr );
 407
 408   gtk_widget_dnd_data_set( widget, event, ptr, size );
 409
 410   delete ptr;
 411
 412   source->m_retValue = wxDragCopy;
 413 }
 414
 415 wxDropSource::wxDropSource( wxWindow *win )
 416 {
 417   g_blockEventsOnDrag = TRUE;
 418
 419   m_window = win;
 420   m_widget = win->m_widget;
 421   if (win->m_wxwindow) m_widget = win->m_wxwindow;
 422
 423   m_data = (wxDataObject *) NULL;
 424   m_retValue = wxDragCancel;
 425
 426   m_defaultCursor = wxCursor( wxCURSOR_NO_ENTRY );
 427   m_goaheadCursor = wxCursor( wxCURSOR_HAND );
 428 }
 429
 430 wxDropSource::wxDropSource( wxDataObject &data, wxWindow *win )
 431 {
 432   g_blockEventsOnDrag = TRUE;
 433
 434   m_window = win;
 435   m_widget = win->m_widget;
 436   if (win->m_wxwindow) m_widget = win->m_wxwindow;
 437   m_retValue = wxDragCancel;
 438
 439   m_data = &data;
 440
 441   m_defaultCursor = wxCursor( wxCURSOR_NO_ENTRY );
 442   m_goaheadCursor = wxCursor( wxCURSOR_HAND );
 443 }
 444
 445 void wxDropSource::SetData( wxDataObject &data )
 446 {
 447   m_data = &data;
 448 }
 449
 450 wxDropSource::~wxDropSource(void)
 451 {
 452 //  if (m_data) delete m_data;
 453
 454   g_blockEventsOnDrag = FALSE;
 455 }
 456
 457 wxDragResult wxDropSource::DoDragDrop( bool WXUNUSED(bAllowMove) )
 458 {
 459   if (gdk_dnd.dnd_grabbed) return (wxDragResult) wxDragNone;
 460   if (gdk_dnd.drag_really) return (wxDragResult) wxDragNone;
 461
 462   wxASSERT_MSG( m_data, "wxDragSource: no data" );
 463
 464   if (!m_data) return (wxDragResult) wxDragNone;
 465   if (m_data->GetDataSize() == 0) return (wxDragResult) wxDragNone;
 466
 467   GdkWindowPrivate *wp = (GdkWindowPrivate*) m_widget->window;
 468
 469   RegisterWindow();
 470
 471   gdk_dnd.drag_perhaps = TRUE;
 472
 473   gdk_dnd.dnd_drag_start.x = 5;
 474   gdk_dnd.dnd_drag_start.y = 5;
 475   gdk_dnd.real_sw = wp;
 476
 477   if (gdk_dnd.drag_startwindows)
 478   {
 479     g_free( gdk_dnd.drag_startwindows );
 480     gdk_dnd.drag_startwindows = (GdkWindow **) NULL;
 481   }
 482   gdk_dnd.drag_numwindows = gdk_dnd.drag_really = 0;
 483
 484   XWindowAttributes dnd_winattr;
 485   XGetWindowAttributes( gdk_display, wp->xwindow, &dnd_winattr );
 486   wp->dnd_drag_savedeventmask = dnd_winattr.your_event_mask;
 487
 488   gdk_dnd_drag_addwindow( m_widget->window );
 489
 490   GdkEventDragBegin ev;
 491   ev.type = GDK_DRAG_BEGIN;
 492   ev.window = m_widget->window;
 493   ev.u.allflags = 0;
 494   ev.u.flags.protocol_version = DND_PROTOCOL_VERSION;
 495
 496   gdk_event_put( (GdkEvent*)&ev );
 497
 498   XGrabPointer( gdk_display, wp->xwindow, False,
 499                 ButtonMotionMask | ButtonPressMask | ButtonReleaseMask | PointerMotionMask,
 500                 GrabModeAsync, GrabModeAsync, gdk_root_window, None, CurrentTime );
 501
 502   gdk_dnd_set_drag_cursors( m_defaultCursor.GetCursor(), m_goaheadCursor.GetCursor() );
 503
 504   gdk_dnd.dnd_grabbed = TRUE;
 505   gdk_dnd.drag_really = 1;
 506
 507   int x = 0;
 508   int y = 0;
 509   gdk_window_get_pointer( m_widget->window, &x, &y, (GdkModifierType *) NULL );
 510
 511   gdk_dnd_display_drag_cursor( x, y, FALSE, TRUE );
 512
 513   while (gdk_dnd.drag_really || gdk_dnd.drag_perhaps) wxYield();
 514
 515   UnregisterWindow();
 516
 517   g_blockEventsOnDrag = FALSE;
 518
 519   return m_retValue;
 520 }
 521
 522 void wxDropSource::RegisterWindow(void)
 523 {
 524   if (!m_data) return;
 525
 526   wxString formats;
 527
 528   wxDataFormat df = m_data->GetPreferredFormat();
 529
 530     switch (df)
 531     {
 532       case wxDF_TEXT:
 533         formats += "text/plain";
 534         break;
 535       case wxDF_FILENAME:
 536         formats += "file:ALL";
 537         break;
 538       default:
 539         break;
 540     }
 541
 542   char *str = WXSTRINGCAST formats;
 543
 544   gtk_widget_dnd_drag_set( m_widget, TRUE, &str, 1 );
 545
 546   gtk_signal_connect( GTK_OBJECT(m_widget), "drag_request_event",
 547     GTK_SIGNAL_FUNC(gtk_drag_callback), (gpointer)this );
 548 }
 549
 550 void wxDropSource::UnregisterWindow(void)
 551 {
 552   if (!m_widget) return;
 553
 554   gtk_widget_dnd_drag_set( m_widget, FALSE, (gchar **) NULL, 0 );
 555
 556   gtk_signal_disconnect_by_data( GTK_OBJECT(m_widget), (gpointer)this );
 557 }
 558
 559 #endif
 560        // NEW_GTK_DND_CODE
 561