X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/33a5bc5299a068b4d6a313a7dc830a74edb5780a..a83ea9c15a7ac7bbdc6686164cfcbbc21ae5031a:/src/gtk1/dnd.cpp?ds=sidebyside diff --git a/src/gtk1/dnd.cpp b/src/gtk1/dnd.cpp index 6cdb19747f..bacea138e7 100644 --- a/src/gtk1/dnd.cpp +++ b/src/gtk1/dnd.cpp @@ -4,50 +4,161 @@ // Author: Robert Roebling // Id: $Id$ // Copyright: (c) 1998 Robert Roebling -// Licence: wxWindows licence +// Licence: wxWindows licence /////////////////////////////////////////////////////////////////////////////// -#ifdef __GNUG__ -#pragma implementation "dnd.h" +#if defined(__GNUG__) && !defined(NO_GCC_PRAGMA) + #pragma implementation "dnd.h" #endif +// For compilers that support precompilation, includes "wx.h". +#include "wx/wxprec.h" + #include "wx/dnd.h" +#include "wx/log.h" + + +#if wxUSE_DRAG_AND_DROP + #include "wx/window.h" #include "wx/app.h" #include "wx/gdicmn.h" -#include +#include "wx/intl.h" +#include "wx/utils.h" -#include "gdk/gdkprivate.h" +#include "wx/gtk/private.h" -#include +#include -// ---------------------------------------------------------------------------- -// global -// ---------------------------------------------------------------------------- +#include +#include -extern bool g_blockEventsOnDrag; +//----------------------------------------------------------------------------- +// idle system +//----------------------------------------------------------------------------- +extern void wxapp_install_idle_handler(); +extern bool g_isIdle; -#if (GTK_MINOR_VERSION == 1) -#if (GTK_MICRO_VERSION >= 3) -#define NEW_GTK_DND_CODE -#endif +//----------------------------------------------------------------------------- +// thread system +//----------------------------------------------------------------------------- + +#if wxUSE_THREADS #endif -#ifdef NEW_GTK_DND_CODE +//---------------------------------------------------------------------------- +// global data +//---------------------------------------------------------------------------- + +extern bool g_blockEventsOnDrag; + +// the flags used for the last DoDragDrop() +static long gs_flagsForDrag = 0; + +// the trace mask we use with wxLogTrace() - call +// wxLog::AddTraceMask(TRACE_DND) to enable the trace messages from here +// (there are quite a few of them, so don't enable this by default) +static const wxChar *TRACE_DND = _T("dnd"); + +//---------------------------------------------------------------------------- +// standard icons +//---------------------------------------------------------------------------- + +/* XPM */ +static const char * page_xpm[] = { +/* width height ncolors chars_per_pixel */ +"32 32 5 1", +/* colors */ +" s None c None", +". c black", +"X c wheat", +"o c tan", +"O c #6699FF", +/* pixels */ +" ................... ", +" .XXXXXXXXXXXXXXXXX.. ", +" .XXXXXXXXXXXXXXXXX.o. ", +" .XXXXXXXXXXXXXXXXX.oo. ", +" .XXXXXXXXXXXXXXXXX.ooo. ", +" .XXXXXXXXXXXXXXXXX.oooo. ", +" .XXXXXXXXXXXXXXXXX....... ", +" .XXXXXOOOOOOOOOOXXXooooo. ", +" .XXXXXXXXXXXXXXXXXXooooo. ", +" .XXXXXOOOOOOOOOOXXXXXXXX. ", +" .XXXXXXXXXXXXXXXXXXXXXXX. ", +" .XXXXXXXOOOOOOOOOXXXXXXX. ", +" .XXXXXXXXXXXXXXXXXXXXXXX. ", +" .XXXXXXOOOOOOOOOOXXXXXXX. ", +" .XXXXXXXXXXXXXXXXXXXXXXX. ", +" .XXXXXOOOOOOOOOOXXXXXXXX. ", +" .XXXXXXXXXXXXXXXXXXXXXXX. ", +" .XXXXXXXOOOOOOOOOXXXXXXX. ", +" .XXXXXXXXXXXXXXXXXXXXXXX. ", +" .XXXXXXOOOOOOOOOOXXXXXXX. ", +" .XXXXXXXXXXXXXXXXXXXXXXX. ", +" .XXXXXOOOOOOOOOOXXXXXXXX. ", +" .XXXXXXXXXXXXXXXXXXXXXXX. ", +" .XXXXXXOOOOOOOOOOXXXXXXX. ", +" .XXXXXXXXXXXXXXXXXXXXXXX. ", +" .XXXXXOOOOOOOXXXXXXXXXXX. ", +" .XXXXXXXXXXXXXXXXXXXXXXX. ", +" .XXXXXXXXXXXXXXXXXXXXXXX. ", +" .XXXXXXXXXXXXXXXXXXXXXXX. ", +" .XXXXXXXXXXXXXXXXXXXXXXX. ", +" .XXXXXXXXXXXXXXXXXXXXXXX. ", +" ......................... "}; + + +// ============================================================================ +// private functions +// ============================================================================ + +// ---------------------------------------------------------------------------- +// convert between GTK+ and wxWidgets DND constants +// ---------------------------------------------------------------------------- + +static wxDragResult ConvertFromGTK(long action) +{ + switch ( action ) + { + case GDK_ACTION_COPY: + return wxDragCopy; + + case GDK_ACTION_LINK: + return wxDragLink; + + case GDK_ACTION_MOVE: + return wxDragMove; + } -#include "gtk/gtkdnd.h" -#include "gtk/gtkselection.h" + return wxDragNone; +} // ---------------------------------------------------------------------------- // "drag_leave" // ---------------------------------------------------------------------------- static void target_drag_leave( GtkWidget *WXUNUSED(widget), - GdkDragContext *WXUNUSED(context), - guint WXUNUSED(time) ) + GdkDragContext *context, + guint WXUNUSED(time), + wxDropTarget *drop_target ) { - printf( "leave.\n" ); + if (g_isIdle) wxapp_install_idle_handler(); + + /* inform the wxDropTarget about the current GdkDragContext. + this is only valid for the duration of this call */ + drop_target->SetDragContext( context ); + + /* we don't need return values. this event is just for + information */ + drop_target->OnLeave(); + + /* this has to be done because GDK has no "drag_enter" event */ + drop_target->m_firstMotion = TRUE; + + /* after this, invalidate the drop_target's GdkDragContext */ + drop_target->SetDragContext( (GdkDragContext*) NULL ); } // ---------------------------------------------------------------------------- @@ -55,14 +166,77 @@ static void target_drag_leave( GtkWidget *WXUNUSED(widget), // ---------------------------------------------------------------------------- static gboolean target_drag_motion( GtkWidget *WXUNUSED(widget), - GdkDragContext *context, - gint WXUNUSED(x), - gint WXUNUSED(y), - guint time ) -{ - printf( "motion.\n" ); - gdk_drag_status( context, context->suggested_action, time ); - return TRUE; + GdkDragContext *context, + gint x, + gint y, + guint time, + wxDropTarget *drop_target ) +{ + if (g_isIdle) wxapp_install_idle_handler(); + + /* Owen Taylor: "if the coordinates not in a drop zone, + return FALSE, otherwise call gtk_drag_status() and + return TRUE" */ + + /* inform the wxDropTarget about the current GdkDragContext. + this is only valid for the duration of this call */ + drop_target->SetDragContext( context ); + + // GTK+ always supposes that we want to copy the data by default while we + // might want to move it, so examine not only suggested_action - which is + // only good if we don't have our own preferences - but also the actions + // field + wxDragResult result; + if ( (gs_flagsForDrag & wxDrag_DefaultMove) == wxDrag_DefaultMove && + (context->actions & GDK_ACTION_MOVE ) ) + { + // move is requested by the program and allowed by GTK+ - do it, even + // though suggested_action may be currently wxDragCopy + result = wxDragMove; + } + else // use whatever GTK+ says we should + { + result = ConvertFromGTK(context->suggested_action); + + if ( (result == wxDragMove) && !(gs_flagsForDrag & wxDrag_AllowMove) ) + { + // we're requested to move but we can't + result = wxDragCopy; + } + } + + if (drop_target->m_firstMotion) + { + /* the first "drag_motion" event substitutes a "drag_enter" event */ + result = drop_target->OnEnter( x, y, result ); + } + else + { + /* give program a chance to react (i.e. to say no by returning FALSE) */ + result = drop_target->OnDragOver( x, y, result ); + } + + bool ret = wxIsDragResultOk( result ); + if (ret) + { + GdkDragAction action; + if (result == wxDragCopy) + action = GDK_ACTION_COPY; + else if (result == wxDragLink) + action = GDK_ACTION_LINK; + else + action = GDK_ACTION_MOVE; + + gdk_drag_status( context, action, time ); + } + + /* after this, invalidate the drop_target's GdkDragContext */ + drop_target->SetDragContext( (GdkDragContext*) NULL ); + + /* this has to be done because GDK has no "drag_enter" event */ + drop_target->m_firstMotion = FALSE; + + return ret; } // ---------------------------------------------------------------------------- @@ -70,21 +244,98 @@ static gboolean target_drag_motion( GtkWidget *WXUNUSED(widget), // ---------------------------------------------------------------------------- static gboolean target_drag_drop( GtkWidget *widget, - GdkDragContext *context, - gint x, - gint y, - guint time ) + GdkDragContext *context, + gint x, + gint y, + guint time, + wxDropTarget *drop_target ) { - printf( "drop at: %d,%d.\n", x, y ); - - if (context->targets) + if (g_isIdle) wxapp_install_idle_handler(); + + /* Owen Taylor: "if the drop is not in a drop zone, + return FALSE, otherwise, if you aren't accepting + the drop, call gtk_drag_finish() with success == FALSE + otherwise call gtk_drag_data_get()" */ + +// printf( "drop.\n" ); + + /* this seems to make a difference between not accepting + due to wrong target area and due to wrong format. let + us hope that this is not required.. */ + + /* inform the wxDropTarget about the current GdkDragContext. + this is only valid for the duration of this call */ + drop_target->SetDragContext( context ); + + /* inform the wxDropTarget about the current drag widget. + this is only valid for the duration of this call */ + drop_target->SetDragWidget( widget ); + + /* inform the wxDropTarget about the current drag time. + this is only valid for the duration of this call */ + drop_target->SetDragTime( time ); + +/* + wxDragResult result = wxDragMove; + if (context->suggested_action == GDK_ACTION_COPY) result = wxDragCopy; +*/ + + /* reset the block here as someone might very well + show a dialog as a reaction to a drop and this + wouldn't work without events */ + g_blockEventsOnDrag = FALSE; + + bool ret = drop_target->OnDrop( x, y ); + + if (!ret) { - gtk_drag_get_data( widget, - context, - GPOINTER_TO_INT (context->targets->data), - time ); + wxLogTrace(TRACE_DND, wxT( "Drop target: OnDrop returned FALSE") ); + + /* cancel the whole thing */ + gtk_drag_finish( context, + FALSE, /* no success */ + FALSE, /* don't delete data on dropping side */ + time ); } - return FALSE; + else + { + wxLogTrace(TRACE_DND, wxT( "Drop target: OnDrop returned TRUE") ); + +#if wxUSE_THREADS + /* disable GUI threads */ +#endif + + GdkAtom format = drop_target->GetMatchingPair(); + + // this does happen somehow, see bug 555111 + wxCHECK_MSG( format, FALSE, _T("no matching GdkAtom for format?") ) + +/* + GdkDragAction action = GDK_ACTION_MOVE; + if (result == wxDragCopy) action == GDK_ACTION_COPY; + context->action = action; +*/ + /* this should trigger an "drag_data_received" event */ + gtk_drag_get_data( widget, + context, + format, + time ); + +#if wxUSE_THREADS + /* re-enable GUI threads */ +#endif + } + + /* after this, invalidate the drop_target's GdkDragContext */ + drop_target->SetDragContext( (GdkDragContext*) NULL ); + + /* after this, invalidate the drop_target's drag widget */ + drop_target->SetDragWidget( (GtkWidget*) NULL ); + + /* this has to be done because GDK has no "drag_enter" event */ + drop_target->m_firstMotion = TRUE; + + return ret; } // ---------------------------------------------------------------------------- @@ -92,616 +343,563 @@ static gboolean target_drag_drop( GtkWidget *widget, // ---------------------------------------------------------------------------- static void target_drag_data_received( GtkWidget *WXUNUSED(widget), - GdkDragContext *context, - gint x, - gint y, - GtkSelectionData *data, - guint WXUNUSED(info), - guint time ) + GdkDragContext *context, + gint x, + gint y, + GtkSelectionData *data, + guint WXUNUSED(info), + guint time, + wxDropTarget *drop_target ) { - printf( "data receive at: %d,%d.\n", x, y ); - - if ((data->length >= 0) && (data->format == 8)) + if (g_isIdle) wxapp_install_idle_handler(); + + /* Owen Taylor: "call gtk_drag_finish() with + success == TRUE" */ + + if ((data->length <= 0) || (data->format != 8)) { - wxString str = (const char*)data->data; - printf( "Received %s\n.", WXSTRINGCAST str ); - gtk_drag_finish( context, TRUE, FALSE, time ); - return; + /* negative data length and non 8-bit data format + qualifies for junk */ + gtk_drag_finish (context, FALSE, FALSE, time); + + return; } - - gtk_drag_finish (context, FALSE, FALSE, time); -} -// ---------------------------------------------------------------------------- -// wxDropTarget -// ---------------------------------------------------------------------------- + wxLogTrace(TRACE_DND, wxT( "Drop target: data received event") ); -wxDropTarget::wxDropTarget() -{ -} + /* inform the wxDropTarget about the current GtkSelectionData. + this is only valid for the duration of this call */ + drop_target->SetDragData( data ); -wxDropTarget::~wxDropTarget() -{ -} + wxDragResult result = ConvertFromGTK(context->suggested_action); -void wxDropTarget::UnregisterWidget( GtkWidget *widget ) -{ - wxCHECK_RET( widget != NULL, "unregister widget is NULL" ); - - gtk_drag_dest_set( widget, - (GtkDestDefaults) 0, - (GtkTargetEntry*) NULL, - 0, - (GdkDragAction) 0 ); - - gtk_signal_disconnect_by_func( GTK_OBJECT(widget), - GTK_SIGNAL_FUNC(target_drag_leave), (gpointer) this ); - - gtk_signal_disconnect_by_func( GTK_OBJECT(widget), - GTK_SIGNAL_FUNC(target_drag_motion), (gpointer) this ); - - gtk_signal_disconnect_by_func( GTK_OBJECT(widget), - GTK_SIGNAL_FUNC(target_drag_drop), (gpointer) this ); - - gtk_signal_disconnect_by_func( GTK_OBJECT(widget), - GTK_SIGNAL_FUNC(target_drag_data_received), (gpointer) this ); -} + if ( wxIsDragResultOk( drop_target->OnData( x, y, result ) ) ) + { + wxLogTrace(TRACE_DND, wxT( "Drop target: OnData returned TRUE") ); -void wxDropTarget::RegisterWidget( GtkWidget *widget ) -{ - wxCHECK_RET( widget != NULL, "register widget is NULL" ); - - GtkTargetEntry format; - format.info = 0; - format.flags = 0; - - int valid = 0; - for ( size_t i = 0; i < GetFormatCount(); i++ ) - { - wxDataFormat df = GetFormat( i ); - switch (df) + /* tell GTK that data transfer was successfull */ + gtk_drag_finish( context, TRUE, FALSE, time ); + } + else { - case wxDF_TEXT: - format.target = "text/plain"; - valid++; - break; - case wxDF_FILENAME: - format.target = "file:ALL"; - valid++; - break; - default: - break; + wxLogTrace(TRACE_DND, wxT( "Drop target: OnData returned FALSE") ); + + /* tell GTK that data transfer was not successfull */ + gtk_drag_finish( context, FALSE, FALSE, time ); } - } - - wxASSERT_MSG( valid != 0, "No valid DnD format supported." ); - - gtk_drag_dest_set( widget, - GTK_DEST_DEFAULT_ALL, - &format, - 1, - (GdkDragAction)(GDK_ACTION_COPY | GDK_ACTION_MOVE) ); - - gtk_signal_connect( GTK_OBJECT(widget), "drag_leave", - GTK_SIGNAL_FUNC(target_drag_leave), (gpointer) this ); - - gtk_signal_connect( GTK_OBJECT(widget), "drag_motion", - GTK_SIGNAL_FUNC(target_drag_motion), (gpointer) this ); - - gtk_signal_connect( GTK_OBJECT(widget), "drag_drop", - GTK_SIGNAL_FUNC(target_drag_drop), (gpointer) this ); - - gtk_signal_connect( GTK_OBJECT(widget), "drag_data_received", - GTK_SIGNAL_FUNC(target_drag_data_received), (gpointer) this ); + + /* after this, invalidate the drop_target's drag data */ + drop_target->SetDragData( (GtkSelectionData*) NULL ); } -// ---------------------------------------------------------------------------- -// wxTextDropTarget -// ---------------------------------------------------------------------------- +//---------------------------------------------------------------------------- +// wxDropTarget +//---------------------------------------------------------------------------- -bool wxTextDropTarget::OnDrop( long x, long y, const void *data, size_t WXUNUSED(size) ) +wxDropTarget::wxDropTarget( wxDataObject *data ) + : wxDropTargetBase( data ) { - OnDropText( x, y, (const char*)data ); - return TRUE; + m_firstMotion = TRUE; + m_dragContext = (GdkDragContext*) NULL; + m_dragWidget = (GtkWidget*) NULL; + m_dragData = (GtkSelectionData*) NULL; + m_dragTime = 0; } -bool wxTextDropTarget::OnDropText( long x, long y, const char *psz ) +wxDragResult wxDropTarget::OnDragOver( wxCoord WXUNUSED(x), + wxCoord WXUNUSED(y), + wxDragResult def ) { - printf( "Got dropped text: %s.\n", psz ); - printf( "At x: %d, y: %d.\n", (int)x, (int)y ); - return TRUE; + // GetMatchingPair() checks for m_dataObject too, no need to do it here + + // disable the debug message from GetMatchingPair() - there are too many + // of them otherwise +#ifdef __WXDEBUG__ + wxLogNull noLog; +#endif // Debug + + return (GetMatchingPair() != (GdkAtom) 0) ? def : wxDragNone; } -size_t wxTextDropTarget::GetFormatCount() const +bool wxDropTarget::OnDrop( wxCoord WXUNUSED(x), wxCoord WXUNUSED(y) ) { - return 1; + if (!m_dataObject) + return FALSE; + + return (GetMatchingPair() != (GdkAtom) 0); } -wxDataFormat wxTextDropTarget::GetFormat(size_t WXUNUSED(n)) const +wxDragResult wxDropTarget::OnData( wxCoord WXUNUSED(x), wxCoord WXUNUSED(y), + wxDragResult def ) { - return wxDF_TEXT; -} + if (!m_dataObject) + return wxDragNone; -// ---------------------------------------------------------------------------- -// wxFileDropTarget -// ---------------------------------------------------------------------------- + if (GetMatchingPair() == (GdkAtom) 0) + return wxDragNone; -bool wxFileDropTarget::OnDropFiles( long x, long y, size_t nFiles, const char * const aszFiles[] ) -{ - printf( "Got %d dropped files.\n", (int)nFiles ); - printf( "At x: %d, y: %d.\n", (int)x, (int)y ); - for (size_t i = 0; i < nFiles; i++) - { - printf( aszFiles[i] ); - printf( "\n" ); - } - return TRUE; + return GetData() ? def : wxDragNone; } -bool wxFileDropTarget::OnDrop(long x, long y, const void *data, size_t size ) +GdkAtom wxDropTarget::GetMatchingPair() { - size_t number = 0; - char *text = (char*) data; - for (size_t i = 0; i < size; i++) - if (text[i] == 0) number++; - - if (number == 0) return TRUE; - - char **files = new char*[number]; - - text = (char*) data; - for (size_t i = 0; i < number; i++) - { - files[i] = text; - int len = strlen( text ); - text += len+1; - } - - bool ret = OnDropFiles( x, y, 1, files ); - - free( files ); - - return ret; -} + if (!m_dataObject) + return (GdkAtom) 0; -size_t wxFileDropTarget::GetFormatCount() const -{ - return 1; -} + if (!m_dragContext) + return (GdkAtom) 0; -wxDataFormat wxFileDropTarget::GetFormat(size_t WXUNUSED(n)) const -{ - return wxDF_FILENAME; -} + GList *child = m_dragContext->targets; + while (child) + { + GdkAtom formatAtom = (GdkAtom) GPOINTER_TO_INT(child->data); + wxDataFormat format( formatAtom ); -//------------------------------------------------------------------------- -// wxDropSource -//------------------------------------------------------------------------- +#ifdef __WXDEBUG__ + wxLogTrace(TRACE_DND, wxT("Drop target: drag has format: %s"), + format.GetId().c_str()); +#endif // Debug -wxDropSource::wxDropSource( wxWindow *win ) -{ - g_blockEventsOnDrag = TRUE; - - m_window = win; - m_widget = win->m_widget; - if (win->m_wxwindow) m_widget = win->m_wxwindow; - - m_data = (wxDataObject *) NULL; - m_retValue = wxDragCancel; - - m_defaultCursor = wxCursor( wxCURSOR_NO_ENTRY ); - m_goaheadCursor = wxCursor( wxCURSOR_HAND ); -} + if (m_dataObject->IsSupportedFormat( format )) + return formatAtom; -wxDropSource::wxDropSource( wxDataObject &data, wxWindow *win ) -{ - g_blockEventsOnDrag = TRUE; - - m_window = win; - m_widget = win->m_widget; - if (win->m_wxwindow) m_widget = win->m_wxwindow; - m_retValue = wxDragCancel; - - m_data = &data; - - m_defaultCursor = wxCursor( wxCURSOR_NO_ENTRY ); - m_goaheadCursor = wxCursor( wxCURSOR_HAND ); -} + child = child->next; + } -void wxDropSource::SetData( wxDataObject &data ) -{ - m_data = &data; + return (GdkAtom) 0; } -wxDropSource::~wxDropSource(void) +bool wxDropTarget::GetData() { -// if (m_data) delete m_data; + if (!m_dragData) + return FALSE; - g_blockEventsOnDrag = FALSE; + if (!m_dataObject) + return FALSE; + + wxDataFormat dragFormat( m_dragData->target ); + + if (!m_dataObject->IsSupportedFormat( dragFormat )) + return FALSE; + + m_dataObject->SetData( dragFormat, (size_t)m_dragData->length, (const void*)m_dragData->data ); + + return TRUE; } - -wxDragResult wxDropSource::DoDragDrop( bool WXUNUSED(bAllowMove) ) + +void wxDropTarget::UnregisterWidget( GtkWidget *widget ) { - wxASSERT_MSG( m_data, "wxDragSource: no data" ); - - if (!m_data) return (wxDragResult) wxDragNone; - if (m_data->GetDataSize() == 0) return (wxDragResult) wxDragNone; - - RegisterWindow(); - - // TODO - - UnregisterWindow(); - - g_blockEventsOnDrag = FALSE; - - return m_retValue; + wxCHECK_RET( widget != NULL, wxT("unregister widget is NULL") ); + + gtk_drag_dest_unset( widget ); + + gtk_signal_disconnect_by_func( GTK_OBJECT(widget), + GTK_SIGNAL_FUNC(target_drag_leave), (gpointer) this ); + + gtk_signal_disconnect_by_func( GTK_OBJECT(widget), + GTK_SIGNAL_FUNC(target_drag_motion), (gpointer) this ); + + gtk_signal_disconnect_by_func( GTK_OBJECT(widget), + GTK_SIGNAL_FUNC(target_drag_drop), (gpointer) this ); + + gtk_signal_disconnect_by_func( GTK_OBJECT(widget), + GTK_SIGNAL_FUNC(target_drag_data_received), (gpointer) this ); } -void wxDropSource::RegisterWindow(void) +void wxDropTarget::RegisterWidget( GtkWidget *widget ) { - if (!m_data) return; + wxCHECK_RET( widget != NULL, wxT("register widget is NULL") ); - wxString formats; - - wxDataFormat df = m_data->GetPreferredFormat(); - - switch (df) - { - case wxDF_TEXT: - formats += "text/plain"; - break; - case wxDF_FILENAME: - formats += "file:ALL"; - break; - default: - break; - } - - char *str = WXSTRINGCAST formats; - - // TODO + /* gtk_drag_dest_set() determines what default behaviour we'd like + GTK to supply. we don't want to specify out targets (=formats) + or actions in advance (i.e. not GTK_DEST_DEFAULT_MOTION and + not GTK_DEST_DEFAULT_DROP). instead we react individually to + "drag_motion" and "drag_drop" events. this makes it possible + to allow dropping on only a small area. we should set + GTK_DEST_DEFAULT_HIGHLIGHT as this will switch on the nice + highlighting if dragging over standard controls, but this + seems to be broken without the other two. */ + + gtk_drag_dest_set( widget, + (GtkDestDefaults) 0, /* no default behaviour */ + (GtkTargetEntry*) NULL, /* we don't supply any formats here */ + 0, /* number of targets = 0 */ + (GdkDragAction) 0 ); /* we don't supply any actions here */ + + gtk_signal_connect( GTK_OBJECT(widget), "drag_leave", + GTK_SIGNAL_FUNC(target_drag_leave), (gpointer) this ); + + gtk_signal_connect( GTK_OBJECT(widget), "drag_motion", + GTK_SIGNAL_FUNC(target_drag_motion), (gpointer) this ); + + gtk_signal_connect( GTK_OBJECT(widget), "drag_drop", + GTK_SIGNAL_FUNC(target_drag_drop), (gpointer) this ); + + gtk_signal_connect( GTK_OBJECT(widget), "drag_data_received", + GTK_SIGNAL_FUNC(target_drag_data_received), (gpointer) this ); } -void wxDropSource::UnregisterWindow(void) +//---------------------------------------------------------------------------- +// "drag_data_get" +//---------------------------------------------------------------------------- + +static void +source_drag_data_get (GtkWidget *WXUNUSED(widget), + GdkDragContext *WXUNUSED(context), + GtkSelectionData *selection_data, + guint WXUNUSED(info), + guint WXUNUSED(time), + wxDropSource *drop_source ) { - if (!m_widget) return; - - // TODO -} + if (g_isIdle) wxapp_install_idle_handler(); + wxDataFormat format( selection_data->target ); -#else // NEW_CODE + wxLogTrace(TRACE_DND, wxT("Drop source: format requested: %s"), + format.GetId().c_str()); + drop_source->m_retValue = wxDragCancel; + wxDataObject *data = drop_source->GetDataObject(); -//----------------------------------------------------------------------------- -// "drop_data_available_event" -//----------------------------------------------------------------------------- + if (!data) + { + wxLogTrace(TRACE_DND, wxT("Drop source: no data object") ); + return; + } -static void gtk_target_callback( GtkWidget *widget, - GdkEventDropDataAvailable *event, - wxDropTarget *target ) -{ - if (target) + if (!data->IsSupportedFormat(format)) { - int x = 0; - int y = 0; - gdk_window_get_pointer( widget->window, &x, &y, (GdkModifierType *) NULL ); + wxLogTrace(TRACE_DND, wxT("Drop source: unsupported format") ); + return; + } - printf( "Drop data is of type %s.\n", event->data_type ); - - target->OnDrop( x, y, (const void*)event->data, (size_t)event->data_numbytes ); + if (data->GetDataSize(format) == 0) + { + wxLogTrace(TRACE_DND, wxT("Drop source: empty data") ); + return; } -/* - g_free (event->data); - g_free (event->data_type); -*/ + size_t size = data->GetDataSize(format); + +// printf( "data size: %d.\n", (int)data_size ); + + guchar *d = new guchar[size]; + + if (!data->GetDataHere( format, (void*)d )) + { + delete[] d; + return; + } + +#if wxUSE_THREADS + /* disable GUI threads */ +#endif + + gtk_selection_data_set( selection_data, + selection_data->target, + 8, // 8-bit + d, + size ); + +#if wxUSE_THREADS + /* enable GUI threads */ +#endif + + delete[] d; } -// ---------------------------------------------------------------------------- -// wxDropTarget -// ---------------------------------------------------------------------------- +//---------------------------------------------------------------------------- +// "drag_data_delete" +//---------------------------------------------------------------------------- -wxDropTarget::wxDropTarget() +static void source_drag_data_delete( GtkWidget *WXUNUSED(widget), + GdkDragContext *context, + wxDropSource *WXUNUSED(drop_source) ) { + if (g_isIdle) + wxapp_install_idle_handler(); + + // printf( "Drag source: drag_data_delete\n" ); } -wxDropTarget::~wxDropTarget() +//---------------------------------------------------------------------------- +// "drag_begin" +//---------------------------------------------------------------------------- + +static void source_drag_begin( GtkWidget *WXUNUSED(widget), + GdkDragContext *WXUNUSED(context), + wxDropSource *WXUNUSED(drop_source) ) { + if (g_isIdle) + wxapp_install_idle_handler(); + + // printf( "Drag source: drag_begin.\n" ); } -void wxDropTarget::UnregisterWidget( GtkWidget *widget ) +//---------------------------------------------------------------------------- +// "drag_end" +//---------------------------------------------------------------------------- + +static void source_drag_end( GtkWidget *WXUNUSED(widget), + GdkDragContext *WXUNUSED(context), + wxDropSource *drop_source ) { - if (!widget) return; - - gtk_signal_disconnect_by_func( GTK_OBJECT(widget), - GTK_SIGNAL_FUNC(gtk_target_callback), (gpointer) this ); + if (g_isIdle) wxapp_install_idle_handler(); - gtk_widget_dnd_drop_set( widget, FALSE, (gchar **) NULL, 0, FALSE ); + // printf( "Drag source: drag_end.\n" ); + + drop_source->m_waiting = FALSE; } -void wxDropTarget::RegisterWidget( GtkWidget *widget ) +//----------------------------------------------------------------------------- +// "configure_event" from m_iconWindow +//----------------------------------------------------------------------------- + +static gint +gtk_dnd_window_configure_callback( GtkWidget *WXUNUSED(widget), GdkEventConfigure *WXUNUSED(event), wxDropSource *source ) { - wxString formats; - int valid = 0; - - for ( size_t i = 0; i < GetFormatCount(); i++ ) - { - wxDataFormat df = GetFormat( i ); - switch (df) - { - case wxDF_TEXT: - if (i > 0) formats += ";"; - formats += "text/plain"; - valid++; - break; - case wxDF_FILENAME: - if (i > 0) formats += ";"; - formats += "file:ALL"; - valid++; - break; - default: - break; - } - } - - char *str = WXSTRINGCAST formats; - - gtk_widget_dnd_drop_set( widget, TRUE, &str, valid, FALSE ); - - gtk_signal_connect( GTK_OBJECT(widget), "drop_data_available_event", - GTK_SIGNAL_FUNC(gtk_target_callback), (gpointer) this ); + if (g_isIdle) + wxapp_install_idle_handler(); + + source->GiveFeedback( ConvertFromGTK(source->m_dragContext->action) ); + + return 0; } -// ---------------------------------------------------------------------------- -// wxTextDropTarget -// ---------------------------------------------------------------------------- +//--------------------------------------------------------------------------- +// wxDropSource +//--------------------------------------------------------------------------- -bool wxTextDropTarget::OnDrop( long x, long y, const void *data, size_t WXUNUSED(size) ) +wxDropSource::wxDropSource(wxWindow *win, + const wxIcon &iconCopy, + const wxIcon &iconMove, + const wxIcon &iconNone) { - OnDropText( x, y, (const char*)data ); - return TRUE; + m_waiting = TRUE; + + m_iconWindow = (GtkWidget*) NULL; + + m_window = win; + m_widget = win->m_widget; + if (win->m_wxwindow) m_widget = win->m_wxwindow; + + m_retValue = wxDragCancel; + + SetIcons(iconCopy, iconMove, iconNone); } -bool wxTextDropTarget::OnDropText( long x, long y, const char *psz ) +wxDropSource::wxDropSource(wxDataObject& data, + wxWindow *win, + const wxIcon &iconCopy, + const wxIcon &iconMove, + const wxIcon &iconNone) { - printf( "Got dropped text: %s.\n", psz ); - printf( "At x: %d, y: %d.\n", (int)x, (int)y ); - return TRUE; + m_waiting = TRUE; + + SetData( data ); + + m_iconWindow = (GtkWidget*) NULL; + + m_window = win; + m_widget = win->m_widget; + if (win->m_wxwindow) m_widget = win->m_wxwindow; + + m_retValue = wxDragCancel; + + SetIcons(iconCopy, iconMove, iconNone); } -size_t wxTextDropTarget::GetFormatCount() const +void wxDropSource::SetIcons(const wxIcon &iconCopy, + const wxIcon &iconMove, + const wxIcon &iconNone) { - return 1; + m_iconCopy = iconCopy; + m_iconMove = iconMove; + m_iconNone = iconNone; + + if ( !m_iconCopy.Ok() ) + m_iconCopy = wxIcon(page_xpm); + if ( !m_iconMove.Ok() ) + m_iconMove = m_iconCopy; + if ( !m_iconNone.Ok() ) + m_iconNone = m_iconCopy; } -wxDataFormat wxTextDropTarget::GetFormat(size_t WXUNUSED(n)) const +wxDropSource::~wxDropSource() { - return wxDF_TEXT; } -// ---------------------------------------------------------------------------- -// wxFileDropTarget -// ---------------------------------------------------------------------------- - -bool wxFileDropTarget::OnDropFiles( long x, long y, size_t nFiles, const char * const aszFiles[] ) +void wxDropSource::PrepareIcon( int action, GdkDragContext *context ) { - printf( "Got %d dropped files.\n", (int)nFiles ); - printf( "At x: %d, y: %d.\n", (int)x, (int)y ); - for (size_t i = 0; i < nFiles; i++) - { - printf( aszFiles[i] ); - printf( "\n" ); - } - return TRUE; + // get the right icon to display + wxIcon *icon = NULL; + if ( action & GDK_ACTION_MOVE ) + icon = &m_iconMove; + else if ( action & GDK_ACTION_COPY ) + icon = &m_iconCopy; + else + icon = &m_iconNone; + + GdkBitmap *mask; + if ( icon->GetMask() ) + mask = icon->GetMask()->GetBitmap(); + else + mask = (GdkBitmap *)NULL; + + GdkPixmap *pixmap = icon->GetPixmap(); + + gint width,height; + gdk_window_get_size (pixmap, &width, &height); + + GdkColormap *colormap = gtk_widget_get_colormap( m_widget ); +#ifndef __WXGTK20__ + gtk_widget_push_visual (gdk_colormap_get_visual (colormap)); +#endif + gtk_widget_push_colormap (colormap); + + m_iconWindow = gtk_window_new (GTK_WINDOW_POPUP); + gtk_widget_set_events (m_iconWindow, GDK_BUTTON_PRESS_MASK | GDK_BUTTON_RELEASE_MASK); + gtk_widget_set_app_paintable (GTK_WIDGET (m_iconWindow), TRUE); + +#ifndef __WXGTK20__ + gtk_widget_pop_visual (); +#endif + gtk_widget_pop_colormap (); + + gtk_widget_set_usize (m_iconWindow, width, height); + gtk_widget_realize (m_iconWindow); + + gtk_signal_connect( GTK_OBJECT(m_iconWindow), "configure_event", + GTK_SIGNAL_FUNC(gtk_dnd_window_configure_callback), (gpointer)this ); + + gdk_window_set_back_pixmap (m_iconWindow->window, pixmap, FALSE); + + if (mask) + gtk_widget_shape_combine_mask (m_iconWindow, mask, 0, 0); + + gtk_drag_set_icon_widget( context, m_iconWindow, 0, 0 ); } -bool wxFileDropTarget::OnDrop(long x, long y, const void *data, size_t size ) +wxDragResult wxDropSource::DoDragDrop(int flags) { - size_t number = 0; - char *text = (char*) data; - for (size_t i = 0; i < size; i++) - if (text[i] == 0) number++; - - if (number == 0) return TRUE; - - char **files = new char*[number]; - - text = (char*) data; - for (size_t i = 0; i < number; i++) + wxCHECK_MSG( m_data && m_data->GetFormatCount(), wxDragNone, + wxT("Drop source: no data") ); + + // still in drag + if (g_blockEventsOnDrag) + return wxDragNone; + + // disabled for now + g_blockEventsOnDrag = TRUE; + + RegisterWindow(); + + m_waiting = TRUE; + + GtkTargetList *target_list = gtk_target_list_new( (GtkTargetEntry*) NULL, 0 ); + + wxDataFormat *array = new wxDataFormat[ m_data->GetFormatCount() ]; + m_data->GetAllFormats( array ); + size_t count = m_data->GetFormatCount(); + for (size_t i = 0; i < count; i++) { - files[i] = text; - int len = strlen( text ); - text += len+1; + GdkAtom atom = array[i]; + wxLogTrace(TRACE_DND, wxT("Drop source: Supported atom %s"), gdk_atom_name( atom )); + gtk_target_list_add( target_list, atom, 0, 0 ); } + delete[] array; + + GdkEventMotion event; + event.window = m_widget->window; + int x = 0; + int y = 0; + GdkModifierType state; + gdk_window_get_pointer( event.window, &x, &y, &state ); + event.x = x; + event.y = y; + event.state = state; + event.time = (guint32)GDK_CURRENT_TIME; + + /* GTK wants to know which button was pressed which caused the dragging */ + int button_number = 0; + if (event.state & GDK_BUTTON1_MASK) button_number = 1; + else if (event.state & GDK_BUTTON2_MASK) button_number = 2; + else if (event.state & GDK_BUTTON3_MASK) button_number = 3; + +#if wxUSE_THREADS + /* disable GUI threads */ +#endif - bool ret = OnDropFiles( x, y, 1, files ); - - free( files ); - - return ret; -} + /* don't start dragging if no button is down */ + if (button_number) + { + int action = GDK_ACTION_COPY; + if ( flags & wxDrag_AllowMove ) + action |= GDK_ACTION_MOVE; -size_t wxFileDropTarget::GetFormatCount() const -{ - return 1; -} + // VZ: as we already use g_blockEventsOnDrag it shouldn't be that bad + // to use a global to pass the flags to the drop target but I'd + // surely prefer a better way to do it + gs_flagsForDrag = flags; -wxDataFormat wxFileDropTarget::GetFormat(size_t WXUNUSED(n)) const -{ - return wxDF_FILENAME; -} + GdkDragContext *context = gtk_drag_begin( m_widget, + target_list, + (GdkDragAction)action, + button_number, /* number of mouse button which started drag */ + (GdkEvent*) &event ); -//------------------------------------------------------------------------- -// wxDropSource -//------------------------------------------------------------------------- + m_dragContext = context; -//----------------------------------------------------------------------------- -// drag request + PrepareIcon( action, context ); -void gtk_drag_callback( GtkWidget *widget, GdkEvent *event, wxDropSource *source ) -{ - printf( "Data requested for dropping.\n" ); - - wxDataObject *data = source->m_data; - - size_t size = data->GetDataSize(); - char *ptr = new char[size]; - data->GetDataHere( ptr ); - - gtk_widget_dnd_data_set( widget, event, ptr, size ); - - delete ptr; - - source->m_retValue = wxDragCopy; -} + while (m_waiting) + gtk_main_iteration(); -wxDropSource::wxDropSource( wxWindow *win ) -{ - g_blockEventsOnDrag = TRUE; - - m_window = win; - m_widget = win->m_widget; - if (win->m_wxwindow) m_widget = win->m_wxwindow; - - m_data = (wxDataObject *) NULL; - m_retValue = wxDragCancel; - - m_defaultCursor = wxCursor( wxCURSOR_NO_ENTRY ); - m_goaheadCursor = wxCursor( wxCURSOR_HAND ); -} + m_retValue = ConvertFromGTK(context->action); + if ( m_retValue == wxDragNone ) + m_retValue = wxDragCancel; + } -wxDropSource::wxDropSource( wxDataObject &data, wxWindow *win ) -{ - g_blockEventsOnDrag = TRUE; - - m_window = win; - m_widget = win->m_widget; - if (win->m_wxwindow) m_widget = win->m_wxwindow; - m_retValue = wxDragCancel; - - m_data = &data; - - m_defaultCursor = wxCursor( wxCURSOR_NO_ENTRY ); - m_goaheadCursor = wxCursor( wxCURSOR_HAND ); -} +#if wxUSE_THREADS + /* re-enable GUI threads */ +#endif -void wxDropSource::SetData( wxDataObject &data ) -{ - m_data = &data; -} + g_blockEventsOnDrag = FALSE; -wxDropSource::~wxDropSource(void) -{ -// if (m_data) delete m_data; + UnregisterWindow(); - g_blockEventsOnDrag = FALSE; -} - -wxDragResult wxDropSource::DoDragDrop( bool WXUNUSED(bAllowMove) ) -{ - if (gdk_dnd.dnd_grabbed) return (wxDragResult) wxDragNone; - if (gdk_dnd.drag_really) return (wxDragResult) wxDragNone; - - wxASSERT_MSG( m_data, "wxDragSource: no data" ); - - if (!m_data) return (wxDragResult) wxDragNone; - if (m_data->GetDataSize() == 0) return (wxDragResult) wxDragNone; - - GdkWindowPrivate *wp = (GdkWindowPrivate*) m_widget->window; - - RegisterWindow(); - - gdk_dnd.drag_perhaps = TRUE; - - gdk_dnd.dnd_drag_start.x = 5; - gdk_dnd.dnd_drag_start.y = 5; - gdk_dnd.real_sw = wp; - - if (gdk_dnd.drag_startwindows) - { - g_free( gdk_dnd.drag_startwindows ); - gdk_dnd.drag_startwindows = (GdkWindow **) NULL; - } - gdk_dnd.drag_numwindows = gdk_dnd.drag_really = 0; - - XWindowAttributes dnd_winattr; - XGetWindowAttributes( gdk_display, wp->xwindow, &dnd_winattr ); - wp->dnd_drag_savedeventmask = dnd_winattr.your_event_mask; - - gdk_dnd_drag_addwindow( m_widget->window ); - - GdkEventDragBegin ev; - ev.type = GDK_DRAG_BEGIN; - ev.window = m_widget->window; - ev.u.allflags = 0; - ev.u.flags.protocol_version = DND_PROTOCOL_VERSION; - - gdk_event_put( (GdkEvent*)&ev ); - - XGrabPointer( gdk_display, wp->xwindow, False, - ButtonMotionMask | ButtonPressMask | ButtonReleaseMask | PointerMotionMask, - GrabModeAsync, GrabModeAsync, gdk_root_window, None, CurrentTime ); - - gdk_dnd_set_drag_cursors( m_defaultCursor.GetCursor(), m_goaheadCursor.GetCursor() ); - - gdk_dnd.dnd_grabbed = TRUE; - gdk_dnd.drag_really = 1; - - int x = 0; - int y = 0; - gdk_window_get_pointer( m_widget->window, &x, &y, (GdkModifierType *) NULL ); - - gdk_dnd_display_drag_cursor( x, y, FALSE, TRUE ); - - while (gdk_dnd.drag_really || gdk_dnd.drag_perhaps) wxYield(); - - UnregisterWindow(); - - g_blockEventsOnDrag = FALSE; - - return m_retValue; + return m_retValue; } -void wxDropSource::RegisterWindow(void) +void wxDropSource::RegisterWindow() { - if (!m_data) return; + if (!m_widget) return; - wxString formats; - - wxDataFormat df = m_data->GetPreferredFormat(); - - switch (df) - { - case wxDF_TEXT: - formats += "text/plain"; - break; - case wxDF_FILENAME: - formats += "file:ALL"; - break; - default: - break; - } - - char *str = WXSTRINGCAST formats; - - gtk_widget_dnd_drag_set( m_widget, TRUE, &str, 1 ); + gtk_signal_connect( GTK_OBJECT(m_widget), "drag_data_get", + GTK_SIGNAL_FUNC (source_drag_data_get), (gpointer) this); + gtk_signal_connect (GTK_OBJECT(m_widget), "drag_data_delete", + GTK_SIGNAL_FUNC (source_drag_data_delete), (gpointer) this ); + gtk_signal_connect (GTK_OBJECT(m_widget), "drag_begin", + GTK_SIGNAL_FUNC (source_drag_begin), (gpointer) this ); + gtk_signal_connect (GTK_OBJECT(m_widget), "drag_end", + GTK_SIGNAL_FUNC (source_drag_end), (gpointer) this ); - gtk_signal_connect( GTK_OBJECT(m_widget), "drag_request_event", - GTK_SIGNAL_FUNC(gtk_drag_callback), (gpointer)this ); } -void wxDropSource::UnregisterWindow(void) +void wxDropSource::UnregisterWindow() { - if (!m_widget) return; - - gtk_widget_dnd_drag_set( m_widget, FALSE, (gchar **) NULL, 0 ); - - gtk_signal_disconnect_by_data( GTK_OBJECT(m_widget), (gpointer)this ); + if (!m_widget) return; + + gtk_signal_disconnect_by_func( GTK_OBJECT(m_widget), + GTK_SIGNAL_FUNC(source_drag_data_get), (gpointer) this ); + gtk_signal_disconnect_by_func( GTK_OBJECT(m_widget), + GTK_SIGNAL_FUNC(source_drag_data_delete), (gpointer) this ); + gtk_signal_disconnect_by_func( GTK_OBJECT(m_widget), + GTK_SIGNAL_FUNC(source_drag_begin), (gpointer) this ); + gtk_signal_disconnect_by_func( GTK_OBJECT(m_widget), + GTK_SIGNAL_FUNC(source_drag_end), (gpointer) this ); } -#endif - // NEW_GTK_DND_CODE - +#endif + // wxUSE_DRAG_AND_DROP