| 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 | #if defined(__GNUG__) && !defined(NO_GCC_PRAGMA) |
| 11 | #pragma implementation "dnd.h" |
| 12 | #endif |
| 13 | |
| 14 | // For compilers that support precompilation, includes "wx.h". |
| 15 | #include "wx/wxprec.h" |
| 16 | |
| 17 | #include "wx/dnd.h" |
| 18 | #include "wx/log.h" |
| 19 | |
| 20 | |
| 21 | #if wxUSE_DRAG_AND_DROP |
| 22 | |
| 23 | #include "wx/window.h" |
| 24 | #include "wx/app.h" |
| 25 | #include "wx/gdicmn.h" |
| 26 | #include "wx/intl.h" |
| 27 | #include "wx/utils.h" |
| 28 | |
| 29 | #include "wx/gtk/private.h" |
| 30 | |
| 31 | #include <gdk/gdkprivate.h> |
| 32 | |
| 33 | #include <gtk/gtkdnd.h> |
| 34 | #include <gtk/gtkselection.h> |
| 35 | |
| 36 | //----------------------------------------------------------------------------- |
| 37 | // idle system |
| 38 | //----------------------------------------------------------------------------- |
| 39 | |
| 40 | extern void wxapp_install_idle_handler(); |
| 41 | extern bool g_isIdle; |
| 42 | |
| 43 | //----------------------------------------------------------------------------- |
| 44 | // thread system |
| 45 | //----------------------------------------------------------------------------- |
| 46 | |
| 47 | #if wxUSE_THREADS |
| 48 | #endif |
| 49 | |
| 50 | //---------------------------------------------------------------------------- |
| 51 | // global data |
| 52 | //---------------------------------------------------------------------------- |
| 53 | |
| 54 | extern bool g_blockEventsOnDrag; |
| 55 | |
| 56 | // the flags used for the last DoDragDrop() |
| 57 | static long gs_flagsForDrag = 0; |
| 58 | |
| 59 | // the trace mask we use with wxLogTrace() - call |
| 60 | // wxLog::AddTraceMask(TRACE_DND) to enable the trace messages from here |
| 61 | // (there are quite a few of them, so don't enable this by default) |
| 62 | static const wxChar *TRACE_DND = _T("dnd"); |
| 63 | |
| 64 | //---------------------------------------------------------------------------- |
| 65 | // standard icons |
| 66 | //---------------------------------------------------------------------------- |
| 67 | |
| 68 | /* XPM */ |
| 69 | static const char * page_xpm[] = { |
| 70 | /* width height ncolors chars_per_pixel */ |
| 71 | "32 32 5 1", |
| 72 | /* colors */ |
| 73 | " s None c None", |
| 74 | ". c black", |
| 75 | "X c wheat", |
| 76 | "o c tan", |
| 77 | "O c #6699FF", |
| 78 | /* pixels */ |
| 79 | " ................... ", |
| 80 | " .XXXXXXXXXXXXXXXXX.. ", |
| 81 | " .XXXXXXXXXXXXXXXXX.o. ", |
| 82 | " .XXXXXXXXXXXXXXXXX.oo. ", |
| 83 | " .XXXXXXXXXXXXXXXXX.ooo. ", |
| 84 | " .XXXXXXXXXXXXXXXXX.oooo. ", |
| 85 | " .XXXXXXXXXXXXXXXXX....... ", |
| 86 | " .XXXXXOOOOOOOOOOXXXooooo. ", |
| 87 | " .XXXXXXXXXXXXXXXXXXooooo. ", |
| 88 | " .XXXXXOOOOOOOOOOXXXXXXXX. ", |
| 89 | " .XXXXXXXXXXXXXXXXXXXXXXX. ", |
| 90 | " .XXXXXXXOOOOOOOOOXXXXXXX. ", |
| 91 | " .XXXXXXXXXXXXXXXXXXXXXXX. ", |
| 92 | " .XXXXXXOOOOOOOOOOXXXXXXX. ", |
| 93 | " .XXXXXXXXXXXXXXXXXXXXXXX. ", |
| 94 | " .XXXXXOOOOOOOOOOXXXXXXXX. ", |
| 95 | " .XXXXXXXXXXXXXXXXXXXXXXX. ", |
| 96 | " .XXXXXXXOOOOOOOOOXXXXXXX. ", |
| 97 | " .XXXXXXXXXXXXXXXXXXXXXXX. ", |
| 98 | " .XXXXXXOOOOOOOOOOXXXXXXX. ", |
| 99 | " .XXXXXXXXXXXXXXXXXXXXXXX. ", |
| 100 | " .XXXXXOOOOOOOOOOXXXXXXXX. ", |
| 101 | " .XXXXXXXXXXXXXXXXXXXXXXX. ", |
| 102 | " .XXXXXXOOOOOOOOOOXXXXXXX. ", |
| 103 | " .XXXXXXXXXXXXXXXXXXXXXXX. ", |
| 104 | " .XXXXXOOOOOOOXXXXXXXXXXX. ", |
| 105 | " .XXXXXXXXXXXXXXXXXXXXXXX. ", |
| 106 | " .XXXXXXXXXXXXXXXXXXXXXXX. ", |
| 107 | " .XXXXXXXXXXXXXXXXXXXXXXX. ", |
| 108 | " .XXXXXXXXXXXXXXXXXXXXXXX. ", |
| 109 | " .XXXXXXXXXXXXXXXXXXXXXXX. ", |
| 110 | " ......................... "}; |
| 111 | |
| 112 | |
| 113 | // ============================================================================ |
| 114 | // private functions |
| 115 | // ============================================================================ |
| 116 | |
| 117 | // ---------------------------------------------------------------------------- |
| 118 | // convert between GTK+ and wxWindows DND constants |
| 119 | // ---------------------------------------------------------------------------- |
| 120 | |
| 121 | static wxDragResult ConvertFromGTK(long action) |
| 122 | { |
| 123 | switch ( action ) |
| 124 | { |
| 125 | case GDK_ACTION_COPY: |
| 126 | return wxDragCopy; |
| 127 | |
| 128 | case GDK_ACTION_LINK: |
| 129 | return wxDragLink; |
| 130 | |
| 131 | case GDK_ACTION_MOVE: |
| 132 | return wxDragMove; |
| 133 | } |
| 134 | |
| 135 | return wxDragNone; |
| 136 | } |
| 137 | |
| 138 | // ---------------------------------------------------------------------------- |
| 139 | // "drag_leave" |
| 140 | // ---------------------------------------------------------------------------- |
| 141 | |
| 142 | static void target_drag_leave( GtkWidget *WXUNUSED(widget), |
| 143 | GdkDragContext *context, |
| 144 | guint WXUNUSED(time), |
| 145 | wxDropTarget *drop_target ) |
| 146 | { |
| 147 | if (g_isIdle) wxapp_install_idle_handler(); |
| 148 | |
| 149 | /* inform the wxDropTarget about the current GdkDragContext. |
| 150 | this is only valid for the duration of this call */ |
| 151 | drop_target->SetDragContext( context ); |
| 152 | |
| 153 | /* we don't need return values. this event is just for |
| 154 | information */ |
| 155 | drop_target->OnLeave(); |
| 156 | |
| 157 | /* this has to be done because GDK has no "drag_enter" event */ |
| 158 | drop_target->m_firstMotion = TRUE; |
| 159 | |
| 160 | /* after this, invalidate the drop_target's GdkDragContext */ |
| 161 | drop_target->SetDragContext( (GdkDragContext*) NULL ); |
| 162 | } |
| 163 | |
| 164 | // ---------------------------------------------------------------------------- |
| 165 | // "drag_motion" |
| 166 | // ---------------------------------------------------------------------------- |
| 167 | |
| 168 | static gboolean target_drag_motion( GtkWidget *WXUNUSED(widget), |
| 169 | GdkDragContext *context, |
| 170 | gint x, |
| 171 | gint y, |
| 172 | guint time, |
| 173 | wxDropTarget *drop_target ) |
| 174 | { |
| 175 | if (g_isIdle) wxapp_install_idle_handler(); |
| 176 | |
| 177 | /* Owen Taylor: "if the coordinates not in a drop zone, |
| 178 | return FALSE, otherwise call gtk_drag_status() and |
| 179 | return TRUE" */ |
| 180 | |
| 181 | /* inform the wxDropTarget about the current GdkDragContext. |
| 182 | this is only valid for the duration of this call */ |
| 183 | drop_target->SetDragContext( context ); |
| 184 | |
| 185 | // GTK+ always supposes that we want to copy the data by default while we |
| 186 | // might want to move it, so examine not only suggested_action - which is |
| 187 | // only good if we don't have our own preferences - but also the actions |
| 188 | // field |
| 189 | wxDragResult result; |
| 190 | if ( (gs_flagsForDrag & wxDrag_DefaultMove) == wxDrag_DefaultMove && |
| 191 | (context->actions & GDK_ACTION_MOVE ) ) |
| 192 | { |
| 193 | // move is requested by the program and allowed by GTK+ - do it, even |
| 194 | // though suggested_action may be currently wxDragCopy |
| 195 | result = wxDragMove; |
| 196 | } |
| 197 | else // use whatever GTK+ says we should |
| 198 | { |
| 199 | result = ConvertFromGTK(context->suggested_action); |
| 200 | |
| 201 | if ( (result == wxDragMove) && !(gs_flagsForDrag & wxDrag_AllowMove) ) |
| 202 | { |
| 203 | // we're requested to move but we can't |
| 204 | result = wxDragCopy; |
| 205 | } |
| 206 | } |
| 207 | |
| 208 | if (drop_target->m_firstMotion) |
| 209 | { |
| 210 | /* the first "drag_motion" event substitutes a "drag_enter" event */ |
| 211 | result = drop_target->OnEnter( x, y, result ); |
| 212 | } |
| 213 | else |
| 214 | { |
| 215 | /* give program a chance to react (i.e. to say no by returning FALSE) */ |
| 216 | result = drop_target->OnDragOver( x, y, result ); |
| 217 | } |
| 218 | |
| 219 | bool ret = wxIsDragResultOk( result ); |
| 220 | if (ret) |
| 221 | { |
| 222 | GdkDragAction action; |
| 223 | if (result == wxDragCopy) |
| 224 | action = GDK_ACTION_COPY; |
| 225 | else if (result == wxDragLink) |
| 226 | action = GDK_ACTION_LINK; |
| 227 | else |
| 228 | action = GDK_ACTION_MOVE; |
| 229 | |
| 230 | gdk_drag_status( context, action, time ); |
| 231 | } |
| 232 | |
| 233 | /* after this, invalidate the drop_target's GdkDragContext */ |
| 234 | drop_target->SetDragContext( (GdkDragContext*) NULL ); |
| 235 | |
| 236 | /* this has to be done because GDK has no "drag_enter" event */ |
| 237 | drop_target->m_firstMotion = FALSE; |
| 238 | |
| 239 | return ret; |
| 240 | } |
| 241 | |
| 242 | // ---------------------------------------------------------------------------- |
| 243 | // "drag_drop" |
| 244 | // ---------------------------------------------------------------------------- |
| 245 | |
| 246 | static gboolean target_drag_drop( GtkWidget *widget, |
| 247 | GdkDragContext *context, |
| 248 | gint x, |
| 249 | gint y, |
| 250 | guint time, |
| 251 | wxDropTarget *drop_target ) |
| 252 | { |
| 253 | if (g_isIdle) wxapp_install_idle_handler(); |
| 254 | |
| 255 | /* Owen Taylor: "if the drop is not in a drop zone, |
| 256 | return FALSE, otherwise, if you aren't accepting |
| 257 | the drop, call gtk_drag_finish() with success == FALSE |
| 258 | otherwise call gtk_drag_data_get()" */ |
| 259 | |
| 260 | // printf( "drop.\n" ); |
| 261 | |
| 262 | /* this seems to make a difference between not accepting |
| 263 | due to wrong target area and due to wrong format. let |
| 264 | us hope that this is not required.. */ |
| 265 | |
| 266 | /* inform the wxDropTarget about the current GdkDragContext. |
| 267 | this is only valid for the duration of this call */ |
| 268 | drop_target->SetDragContext( context ); |
| 269 | |
| 270 | /* inform the wxDropTarget about the current drag widget. |
| 271 | this is only valid for the duration of this call */ |
| 272 | drop_target->SetDragWidget( widget ); |
| 273 | |
| 274 | /* inform the wxDropTarget about the current drag time. |
| 275 | this is only valid for the duration of this call */ |
| 276 | drop_target->SetDragTime( time ); |
| 277 | |
| 278 | /* |
| 279 | wxDragResult result = wxDragMove; |
| 280 | if (context->suggested_action == GDK_ACTION_COPY) result = wxDragCopy; |
| 281 | */ |
| 282 | |
| 283 | /* reset the block here as someone might very well |
| 284 | show a dialog as a reaction to a drop and this |
| 285 | wouldn't work without events */ |
| 286 | g_blockEventsOnDrag = FALSE; |
| 287 | |
| 288 | bool ret = drop_target->OnDrop( x, y ); |
| 289 | |
| 290 | if (!ret) |
| 291 | { |
| 292 | wxLogTrace(TRACE_DND, wxT( "Drop target: OnDrop returned FALSE") ); |
| 293 | |
| 294 | /* cancel the whole thing */ |
| 295 | gtk_drag_finish( context, |
| 296 | FALSE, /* no success */ |
| 297 | FALSE, /* don't delete data on dropping side */ |
| 298 | time ); |
| 299 | } |
| 300 | else |
| 301 | { |
| 302 | wxLogTrace(TRACE_DND, wxT( "Drop target: OnDrop returned TRUE") ); |
| 303 | |
| 304 | #if wxUSE_THREADS |
| 305 | /* disable GUI threads */ |
| 306 | #endif |
| 307 | |
| 308 | GdkAtom format = drop_target->GetMatchingPair(); |
| 309 | |
| 310 | // this does happen somehow, see bug 555111 |
| 311 | wxCHECK_MSG( format, FALSE, _T("no matching GdkAtom for format?") ) |
| 312 | |
| 313 | /* |
| 314 | GdkDragAction action = GDK_ACTION_MOVE; |
| 315 | if (result == wxDragCopy) action == GDK_ACTION_COPY; |
| 316 | context->action = action; |
| 317 | */ |
| 318 | /* this should trigger an "drag_data_received" event */ |
| 319 | gtk_drag_get_data( widget, |
| 320 | context, |
| 321 | format, |
| 322 | time ); |
| 323 | |
| 324 | #if wxUSE_THREADS |
| 325 | /* re-enable GUI threads */ |
| 326 | #endif |
| 327 | } |
| 328 | |
| 329 | /* after this, invalidate the drop_target's GdkDragContext */ |
| 330 | drop_target->SetDragContext( (GdkDragContext*) NULL ); |
| 331 | |
| 332 | /* after this, invalidate the drop_target's drag widget */ |
| 333 | drop_target->SetDragWidget( (GtkWidget*) NULL ); |
| 334 | |
| 335 | /* this has to be done because GDK has no "drag_enter" event */ |
| 336 | drop_target->m_firstMotion = TRUE; |
| 337 | |
| 338 | return ret; |
| 339 | } |
| 340 | |
| 341 | // ---------------------------------------------------------------------------- |
| 342 | // "drag_data_received" |
| 343 | // ---------------------------------------------------------------------------- |
| 344 | |
| 345 | static void target_drag_data_received( GtkWidget *WXUNUSED(widget), |
| 346 | GdkDragContext *context, |
| 347 | gint x, |
| 348 | gint y, |
| 349 | GtkSelectionData *data, |
| 350 | guint WXUNUSED(info), |
| 351 | guint time, |
| 352 | wxDropTarget *drop_target ) |
| 353 | { |
| 354 | if (g_isIdle) wxapp_install_idle_handler(); |
| 355 | |
| 356 | /* Owen Taylor: "call gtk_drag_finish() with |
| 357 | success == TRUE" */ |
| 358 | |
| 359 | if ((data->length <= 0) || (data->format != 8)) |
| 360 | { |
| 361 | /* negative data length and non 8-bit data format |
| 362 | qualifies for junk */ |
| 363 | gtk_drag_finish (context, FALSE, FALSE, time); |
| 364 | |
| 365 | return; |
| 366 | } |
| 367 | |
| 368 | wxLogTrace(TRACE_DND, wxT( "Drop target: data received event") ); |
| 369 | |
| 370 | /* inform the wxDropTarget about the current GtkSelectionData. |
| 371 | this is only valid for the duration of this call */ |
| 372 | drop_target->SetDragData( data ); |
| 373 | |
| 374 | wxDragResult result = ConvertFromGTK(context->suggested_action); |
| 375 | |
| 376 | if ( wxIsDragResultOk( drop_target->OnData( x, y, result ) ) ) |
| 377 | { |
| 378 | wxLogTrace(TRACE_DND, wxT( "Drop target: OnData returned TRUE") ); |
| 379 | |
| 380 | /* tell GTK that data transfer was successfull */ |
| 381 | gtk_drag_finish( context, TRUE, FALSE, time ); |
| 382 | } |
| 383 | else |
| 384 | { |
| 385 | wxLogTrace(TRACE_DND, wxT( "Drop target: OnData returned FALSE") ); |
| 386 | |
| 387 | /* tell GTK that data transfer was not successfull */ |
| 388 | gtk_drag_finish( context, FALSE, FALSE, time ); |
| 389 | } |
| 390 | |
| 391 | /* after this, invalidate the drop_target's drag data */ |
| 392 | drop_target->SetDragData( (GtkSelectionData*) NULL ); |
| 393 | } |
| 394 | |
| 395 | //---------------------------------------------------------------------------- |
| 396 | // wxDropTarget |
| 397 | //---------------------------------------------------------------------------- |
| 398 | |
| 399 | wxDropTarget::wxDropTarget( wxDataObject *data ) |
| 400 | : wxDropTargetBase( data ) |
| 401 | { |
| 402 | m_firstMotion = TRUE; |
| 403 | m_dragContext = (GdkDragContext*) NULL; |
| 404 | m_dragWidget = (GtkWidget*) NULL; |
| 405 | m_dragData = (GtkSelectionData*) NULL; |
| 406 | m_dragTime = 0; |
| 407 | } |
| 408 | |
| 409 | wxDragResult wxDropTarget::OnDragOver( wxCoord WXUNUSED(x), |
| 410 | wxCoord WXUNUSED(y), |
| 411 | wxDragResult def ) |
| 412 | { |
| 413 | // GetMatchingPair() checks for m_dataObject too, no need to do it here |
| 414 | |
| 415 | // disable the debug message from GetMatchingPair() - there are too many |
| 416 | // of them otherwise |
| 417 | #ifdef __WXDEBUG__ |
| 418 | wxLogNull noLog; |
| 419 | #endif // Debug |
| 420 | |
| 421 | return (GetMatchingPair() != (GdkAtom) 0) ? def : wxDragNone; |
| 422 | } |
| 423 | |
| 424 | bool wxDropTarget::OnDrop( wxCoord WXUNUSED(x), wxCoord WXUNUSED(y) ) |
| 425 | { |
| 426 | if (!m_dataObject) |
| 427 | return FALSE; |
| 428 | |
| 429 | return (GetMatchingPair() != (GdkAtom) 0); |
| 430 | } |
| 431 | |
| 432 | wxDragResult wxDropTarget::OnData( wxCoord WXUNUSED(x), wxCoord WXUNUSED(y), |
| 433 | wxDragResult def ) |
| 434 | { |
| 435 | if (!m_dataObject) |
| 436 | return wxDragNone; |
| 437 | |
| 438 | if (GetMatchingPair() == (GdkAtom) 0) |
| 439 | return wxDragNone; |
| 440 | |
| 441 | return GetData() ? def : wxDragNone; |
| 442 | } |
| 443 | |
| 444 | GdkAtom wxDropTarget::GetMatchingPair() |
| 445 | { |
| 446 | if (!m_dataObject) |
| 447 | return (GdkAtom) 0; |
| 448 | |
| 449 | if (!m_dragContext) |
| 450 | return (GdkAtom) 0; |
| 451 | |
| 452 | GList *child = m_dragContext->targets; |
| 453 | while (child) |
| 454 | { |
| 455 | GdkAtom formatAtom = (GdkAtom) GPOINTER_TO_INT(child->data); |
| 456 | wxDataFormat format( formatAtom ); |
| 457 | |
| 458 | #ifdef __WXDEBUG__ |
| 459 | wxLogTrace(TRACE_DND, wxT("Drop target: drag has format: %s"), |
| 460 | format.GetId().c_str()); |
| 461 | #endif // Debug |
| 462 | |
| 463 | if (m_dataObject->IsSupportedFormat( format )) |
| 464 | return formatAtom; |
| 465 | |
| 466 | child = child->next; |
| 467 | } |
| 468 | |
| 469 | return (GdkAtom) 0; |
| 470 | } |
| 471 | |
| 472 | bool wxDropTarget::GetData() |
| 473 | { |
| 474 | if (!m_dragData) |
| 475 | return FALSE; |
| 476 | |
| 477 | if (!m_dataObject) |
| 478 | return FALSE; |
| 479 | |
| 480 | wxDataFormat dragFormat( m_dragData->target ); |
| 481 | |
| 482 | if (!m_dataObject->IsSupportedFormat( dragFormat )) |
| 483 | return FALSE; |
| 484 | |
| 485 | m_dataObject->SetData( dragFormat, (size_t)m_dragData->length, (const void*)m_dragData->data ); |
| 486 | |
| 487 | return TRUE; |
| 488 | } |
| 489 | |
| 490 | void wxDropTarget::UnregisterWidget( GtkWidget *widget ) |
| 491 | { |
| 492 | wxCHECK_RET( widget != NULL, wxT("unregister widget is NULL") ); |
| 493 | |
| 494 | gtk_drag_dest_unset( widget ); |
| 495 | |
| 496 | gtk_signal_disconnect_by_func( GTK_OBJECT(widget), |
| 497 | GTK_SIGNAL_FUNC(target_drag_leave), (gpointer) this ); |
| 498 | |
| 499 | gtk_signal_disconnect_by_func( GTK_OBJECT(widget), |
| 500 | GTK_SIGNAL_FUNC(target_drag_motion), (gpointer) this ); |
| 501 | |
| 502 | gtk_signal_disconnect_by_func( GTK_OBJECT(widget), |
| 503 | GTK_SIGNAL_FUNC(target_drag_drop), (gpointer) this ); |
| 504 | |
| 505 | gtk_signal_disconnect_by_func( GTK_OBJECT(widget), |
| 506 | GTK_SIGNAL_FUNC(target_drag_data_received), (gpointer) this ); |
| 507 | } |
| 508 | |
| 509 | void wxDropTarget::RegisterWidget( GtkWidget *widget ) |
| 510 | { |
| 511 | wxCHECK_RET( widget != NULL, wxT("register widget is NULL") ); |
| 512 | |
| 513 | /* gtk_drag_dest_set() determines what default behaviour we'd like |
| 514 | GTK to supply. we don't want to specify out targets (=formats) |
| 515 | or actions in advance (i.e. not GTK_DEST_DEFAULT_MOTION and |
| 516 | not GTK_DEST_DEFAULT_DROP). instead we react individually to |
| 517 | "drag_motion" and "drag_drop" events. this makes it possible |
| 518 | to allow dropping on only a small area. we should set |
| 519 | GTK_DEST_DEFAULT_HIGHLIGHT as this will switch on the nice |
| 520 | highlighting if dragging over standard controls, but this |
| 521 | seems to be broken without the other two. */ |
| 522 | |
| 523 | gtk_drag_dest_set( widget, |
| 524 | (GtkDestDefaults) 0, /* no default behaviour */ |
| 525 | (GtkTargetEntry*) NULL, /* we don't supply any formats here */ |
| 526 | 0, /* number of targets = 0 */ |
| 527 | (GdkDragAction) 0 ); /* we don't supply any actions here */ |
| 528 | |
| 529 | gtk_signal_connect( GTK_OBJECT(widget), "drag_leave", |
| 530 | GTK_SIGNAL_FUNC(target_drag_leave), (gpointer) this ); |
| 531 | |
| 532 | gtk_signal_connect( GTK_OBJECT(widget), "drag_motion", |
| 533 | GTK_SIGNAL_FUNC(target_drag_motion), (gpointer) this ); |
| 534 | |
| 535 | gtk_signal_connect( GTK_OBJECT(widget), "drag_drop", |
| 536 | GTK_SIGNAL_FUNC(target_drag_drop), (gpointer) this ); |
| 537 | |
| 538 | gtk_signal_connect( GTK_OBJECT(widget), "drag_data_received", |
| 539 | GTK_SIGNAL_FUNC(target_drag_data_received), (gpointer) this ); |
| 540 | } |
| 541 | |
| 542 | //---------------------------------------------------------------------------- |
| 543 | // "drag_data_get" |
| 544 | //---------------------------------------------------------------------------- |
| 545 | |
| 546 | static void |
| 547 | source_drag_data_get (GtkWidget *WXUNUSED(widget), |
| 548 | GdkDragContext *WXUNUSED(context), |
| 549 | GtkSelectionData *selection_data, |
| 550 | guint WXUNUSED(info), |
| 551 | guint WXUNUSED(time), |
| 552 | wxDropSource *drop_source ) |
| 553 | { |
| 554 | if (g_isIdle) wxapp_install_idle_handler(); |
| 555 | |
| 556 | wxDataFormat format( selection_data->target ); |
| 557 | |
| 558 | wxLogTrace(TRACE_DND, wxT("Drop source: format requested: %s"), |
| 559 | format.GetId().c_str()); |
| 560 | |
| 561 | drop_source->m_retValue = wxDragCancel; |
| 562 | |
| 563 | wxDataObject *data = drop_source->GetDataObject(); |
| 564 | |
| 565 | if (!data) |
| 566 | { |
| 567 | wxLogTrace(TRACE_DND, wxT("Drop source: no data object") ); |
| 568 | return; |
| 569 | } |
| 570 | |
| 571 | if (!data->IsSupportedFormat(format)) |
| 572 | { |
| 573 | wxLogTrace(TRACE_DND, wxT("Drop source: unsupported format") ); |
| 574 | return; |
| 575 | } |
| 576 | |
| 577 | if (data->GetDataSize(format) == 0) |
| 578 | { |
| 579 | wxLogTrace(TRACE_DND, wxT("Drop source: empty data") ); |
| 580 | return; |
| 581 | } |
| 582 | |
| 583 | size_t size = data->GetDataSize(format); |
| 584 | |
| 585 | // printf( "data size: %d.\n", (int)data_size ); |
| 586 | |
| 587 | guchar *d = new guchar[size]; |
| 588 | |
| 589 | if (!data->GetDataHere( format, (void*)d )) |
| 590 | { |
| 591 | delete[] d; |
| 592 | return; |
| 593 | } |
| 594 | |
| 595 | #if wxUSE_THREADS |
| 596 | /* disable GUI threads */ |
| 597 | #endif |
| 598 | |
| 599 | gtk_selection_data_set( selection_data, |
| 600 | selection_data->target, |
| 601 | 8, // 8-bit |
| 602 | d, |
| 603 | size ); |
| 604 | |
| 605 | #if wxUSE_THREADS |
| 606 | /* enable GUI threads */ |
| 607 | #endif |
| 608 | |
| 609 | delete[] d; |
| 610 | } |
| 611 | |
| 612 | //---------------------------------------------------------------------------- |
| 613 | // "drag_data_delete" |
| 614 | //---------------------------------------------------------------------------- |
| 615 | |
| 616 | static void source_drag_data_delete( GtkWidget *WXUNUSED(widget), |
| 617 | GdkDragContext *context, |
| 618 | wxDropSource *WXUNUSED(drop_source) ) |
| 619 | { |
| 620 | if (g_isIdle) |
| 621 | wxapp_install_idle_handler(); |
| 622 | |
| 623 | // printf( "Drag source: drag_data_delete\n" ); |
| 624 | } |
| 625 | |
| 626 | //---------------------------------------------------------------------------- |
| 627 | // "drag_begin" |
| 628 | //---------------------------------------------------------------------------- |
| 629 | |
| 630 | static void source_drag_begin( GtkWidget *WXUNUSED(widget), |
| 631 | GdkDragContext *WXUNUSED(context), |
| 632 | wxDropSource *WXUNUSED(drop_source) ) |
| 633 | { |
| 634 | if (g_isIdle) |
| 635 | wxapp_install_idle_handler(); |
| 636 | |
| 637 | // printf( "Drag source: drag_begin.\n" ); |
| 638 | } |
| 639 | |
| 640 | //---------------------------------------------------------------------------- |
| 641 | // "drag_end" |
| 642 | //---------------------------------------------------------------------------- |
| 643 | |
| 644 | static void source_drag_end( GtkWidget *WXUNUSED(widget), |
| 645 | GdkDragContext *WXUNUSED(context), |
| 646 | wxDropSource *drop_source ) |
| 647 | { |
| 648 | if (g_isIdle) wxapp_install_idle_handler(); |
| 649 | |
| 650 | // printf( "Drag source: drag_end.\n" ); |
| 651 | |
| 652 | drop_source->m_waiting = FALSE; |
| 653 | } |
| 654 | |
| 655 | //----------------------------------------------------------------------------- |
| 656 | // "configure_event" from m_iconWindow |
| 657 | //----------------------------------------------------------------------------- |
| 658 | |
| 659 | static gint |
| 660 | gtk_dnd_window_configure_callback( GtkWidget *WXUNUSED(widget), GdkEventConfigure *WXUNUSED(event), wxDropSource *source ) |
| 661 | { |
| 662 | if (g_isIdle) |
| 663 | wxapp_install_idle_handler(); |
| 664 | |
| 665 | source->GiveFeedback( ConvertFromGTK(source->m_dragContext->action) ); |
| 666 | |
| 667 | return 0; |
| 668 | } |
| 669 | |
| 670 | //--------------------------------------------------------------------------- |
| 671 | // wxDropSource |
| 672 | //--------------------------------------------------------------------------- |
| 673 | |
| 674 | wxDropSource::wxDropSource(wxWindow *win, |
| 675 | const wxIcon &iconCopy, |
| 676 | const wxIcon &iconMove, |
| 677 | const wxIcon &iconNone) |
| 678 | { |
| 679 | m_waiting = TRUE; |
| 680 | |
| 681 | m_iconWindow = (GtkWidget*) NULL; |
| 682 | |
| 683 | m_window = win; |
| 684 | m_widget = win->m_widget; |
| 685 | if (win->m_wxwindow) m_widget = win->m_wxwindow; |
| 686 | |
| 687 | m_retValue = wxDragCancel; |
| 688 | |
| 689 | SetIcons(iconCopy, iconMove, iconNone); |
| 690 | } |
| 691 | |
| 692 | wxDropSource::wxDropSource(wxDataObject& data, |
| 693 | wxWindow *win, |
| 694 | const wxIcon &iconCopy, |
| 695 | const wxIcon &iconMove, |
| 696 | const wxIcon &iconNone) |
| 697 | { |
| 698 | m_waiting = TRUE; |
| 699 | |
| 700 | SetData( data ); |
| 701 | |
| 702 | m_iconWindow = (GtkWidget*) NULL; |
| 703 | |
| 704 | m_window = win; |
| 705 | m_widget = win->m_widget; |
| 706 | if (win->m_wxwindow) m_widget = win->m_wxwindow; |
| 707 | |
| 708 | m_retValue = wxDragCancel; |
| 709 | |
| 710 | SetIcons(iconCopy, iconMove, iconNone); |
| 711 | } |
| 712 | |
| 713 | void wxDropSource::SetIcons(const wxIcon &iconCopy, |
| 714 | const wxIcon &iconMove, |
| 715 | const wxIcon &iconNone) |
| 716 | { |
| 717 | m_iconCopy = iconCopy; |
| 718 | m_iconMove = iconMove; |
| 719 | m_iconNone = iconNone; |
| 720 | |
| 721 | if ( !m_iconCopy.Ok() ) |
| 722 | m_iconCopy = wxIcon(page_xpm); |
| 723 | if ( !m_iconMove.Ok() ) |
| 724 | m_iconMove = m_iconCopy; |
| 725 | if ( !m_iconNone.Ok() ) |
| 726 | m_iconNone = m_iconCopy; |
| 727 | } |
| 728 | |
| 729 | wxDropSource::~wxDropSource() |
| 730 | { |
| 731 | } |
| 732 | |
| 733 | void wxDropSource::PrepareIcon( int action, GdkDragContext *context ) |
| 734 | { |
| 735 | // get the right icon to display |
| 736 | wxIcon *icon = NULL; |
| 737 | if ( action & GDK_ACTION_MOVE ) |
| 738 | icon = &m_iconMove; |
| 739 | else if ( action & GDK_ACTION_COPY ) |
| 740 | icon = &m_iconCopy; |
| 741 | else |
| 742 | icon = &m_iconNone; |
| 743 | |
| 744 | GdkBitmap *mask; |
| 745 | if ( icon->GetMask() ) |
| 746 | mask = icon->GetMask()->GetBitmap(); |
| 747 | else |
| 748 | mask = (GdkBitmap *)NULL; |
| 749 | |
| 750 | GdkPixmap *pixmap = icon->GetPixmap(); |
| 751 | |
| 752 | gint width,height; |
| 753 | gdk_window_get_size (pixmap, &width, &height); |
| 754 | |
| 755 | GdkColormap *colormap = gtk_widget_get_colormap( m_widget ); |
| 756 | #ifndef __WXGTK20__ |
| 757 | gtk_widget_push_visual (gdk_colormap_get_visual (colormap)); |
| 758 | #endif |
| 759 | gtk_widget_push_colormap (colormap); |
| 760 | |
| 761 | m_iconWindow = gtk_window_new (GTK_WINDOW_POPUP); |
| 762 | gtk_widget_set_events (m_iconWindow, GDK_BUTTON_PRESS_MASK | GDK_BUTTON_RELEASE_MASK); |
| 763 | gtk_widget_set_app_paintable (GTK_WIDGET (m_iconWindow), TRUE); |
| 764 | |
| 765 | #ifndef __WXGTK20__ |
| 766 | gtk_widget_pop_visual (); |
| 767 | #endif |
| 768 | gtk_widget_pop_colormap (); |
| 769 | |
| 770 | gtk_widget_set_usize (m_iconWindow, width, height); |
| 771 | gtk_widget_realize (m_iconWindow); |
| 772 | |
| 773 | gtk_signal_connect( GTK_OBJECT(m_iconWindow), "configure_event", |
| 774 | GTK_SIGNAL_FUNC(gtk_dnd_window_configure_callback), (gpointer)this ); |
| 775 | |
| 776 | gdk_window_set_back_pixmap (m_iconWindow->window, pixmap, FALSE); |
| 777 | |
| 778 | if (mask) |
| 779 | gtk_widget_shape_combine_mask (m_iconWindow, mask, 0, 0); |
| 780 | |
| 781 | gtk_drag_set_icon_widget( context, m_iconWindow, 0, 0 ); |
| 782 | } |
| 783 | |
| 784 | wxDragResult wxDropSource::DoDragDrop(int flags) |
| 785 | { |
| 786 | wxCHECK_MSG( m_data && m_data->GetFormatCount(), wxDragNone, |
| 787 | wxT("Drop source: no data") ); |
| 788 | |
| 789 | // still in drag |
| 790 | if (g_blockEventsOnDrag) |
| 791 | return wxDragNone; |
| 792 | |
| 793 | // disabled for now |
| 794 | g_blockEventsOnDrag = TRUE; |
| 795 | |
| 796 | RegisterWindow(); |
| 797 | |
| 798 | m_waiting = TRUE; |
| 799 | |
| 800 | GtkTargetList *target_list = gtk_target_list_new( (GtkTargetEntry*) NULL, 0 ); |
| 801 | |
| 802 | wxDataFormat *array = new wxDataFormat[ m_data->GetFormatCount() ]; |
| 803 | m_data->GetAllFormats( array ); |
| 804 | size_t count = m_data->GetFormatCount(); |
| 805 | for (size_t i = 0; i < count; i++) |
| 806 | { |
| 807 | GdkAtom atom = array[i]; |
| 808 | wxLogTrace(TRACE_DND, wxT("Drop source: Supported atom %s"), gdk_atom_name( atom )); |
| 809 | gtk_target_list_add( target_list, atom, 0, 0 ); |
| 810 | } |
| 811 | delete[] array; |
| 812 | |
| 813 | GdkEventMotion event; |
| 814 | event.window = m_widget->window; |
| 815 | int x = 0; |
| 816 | int y = 0; |
| 817 | GdkModifierType state; |
| 818 | gdk_window_get_pointer( event.window, &x, &y, &state ); |
| 819 | event.x = x; |
| 820 | event.y = y; |
| 821 | event.state = state; |
| 822 | event.time = (guint32)GDK_CURRENT_TIME; |
| 823 | |
| 824 | /* GTK wants to know which button was pressed which caused the dragging */ |
| 825 | int button_number = 0; |
| 826 | if (event.state & GDK_BUTTON1_MASK) button_number = 1; |
| 827 | else if (event.state & GDK_BUTTON2_MASK) button_number = 2; |
| 828 | else if (event.state & GDK_BUTTON3_MASK) button_number = 3; |
| 829 | |
| 830 | #if wxUSE_THREADS |
| 831 | /* disable GUI threads */ |
| 832 | #endif |
| 833 | |
| 834 | /* don't start dragging if no button is down */ |
| 835 | if (button_number) |
| 836 | { |
| 837 | int action = GDK_ACTION_COPY; |
| 838 | if ( flags & wxDrag_AllowMove ) |
| 839 | action |= GDK_ACTION_MOVE; |
| 840 | |
| 841 | // VZ: as we already use g_blockEventsOnDrag it shouldn't be that bad |
| 842 | // to use a global to pass the flags to the drop target but I'd |
| 843 | // surely prefer a better way to do it |
| 844 | gs_flagsForDrag = flags; |
| 845 | |
| 846 | GdkDragContext *context = gtk_drag_begin( m_widget, |
| 847 | target_list, |
| 848 | (GdkDragAction)action, |
| 849 | button_number, /* number of mouse button which started drag */ |
| 850 | (GdkEvent*) &event ); |
| 851 | |
| 852 | m_dragContext = context; |
| 853 | |
| 854 | PrepareIcon( action, context ); |
| 855 | |
| 856 | while (m_waiting) |
| 857 | gtk_main_iteration(); |
| 858 | |
| 859 | m_retValue = ConvertFromGTK(context->action); |
| 860 | if ( m_retValue == wxDragNone ) |
| 861 | m_retValue = wxDragCancel; |
| 862 | } |
| 863 | |
| 864 | #if wxUSE_THREADS |
| 865 | /* re-enable GUI threads */ |
| 866 | #endif |
| 867 | |
| 868 | g_blockEventsOnDrag = FALSE; |
| 869 | |
| 870 | UnregisterWindow(); |
| 871 | |
| 872 | return m_retValue; |
| 873 | } |
| 874 | |
| 875 | void wxDropSource::RegisterWindow() |
| 876 | { |
| 877 | if (!m_widget) return; |
| 878 | |
| 879 | gtk_signal_connect( GTK_OBJECT(m_widget), "drag_data_get", |
| 880 | GTK_SIGNAL_FUNC (source_drag_data_get), (gpointer) this); |
| 881 | gtk_signal_connect (GTK_OBJECT(m_widget), "drag_data_delete", |
| 882 | GTK_SIGNAL_FUNC (source_drag_data_delete), (gpointer) this ); |
| 883 | gtk_signal_connect (GTK_OBJECT(m_widget), "drag_begin", |
| 884 | GTK_SIGNAL_FUNC (source_drag_begin), (gpointer) this ); |
| 885 | gtk_signal_connect (GTK_OBJECT(m_widget), "drag_end", |
| 886 | GTK_SIGNAL_FUNC (source_drag_end), (gpointer) this ); |
| 887 | |
| 888 | } |
| 889 | |
| 890 | void wxDropSource::UnregisterWindow() |
| 891 | { |
| 892 | if (!m_widget) return; |
| 893 | |
| 894 | gtk_signal_disconnect_by_func( GTK_OBJECT(m_widget), |
| 895 | GTK_SIGNAL_FUNC(source_drag_data_get), (gpointer) this ); |
| 896 | gtk_signal_disconnect_by_func( GTK_OBJECT(m_widget), |
| 897 | GTK_SIGNAL_FUNC(source_drag_data_delete), (gpointer) this ); |
| 898 | gtk_signal_disconnect_by_func( GTK_OBJECT(m_widget), |
| 899 | GTK_SIGNAL_FUNC(source_drag_begin), (gpointer) this ); |
| 900 | gtk_signal_disconnect_by_func( GTK_OBJECT(m_widget), |
| 901 | GTK_SIGNAL_FUNC(source_drag_end), (gpointer) this ); |
| 902 | } |
| 903 | |
| 904 | #endif |
| 905 | // wxUSE_DRAG_AND_DROP |