X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/b6af8d80dcdd9d7ef9cca3aaaaf8fe4db343d7ae..7d6a4d96961eac84d05db8bb24c64d39003f6e54:/src/gtk/dnd.cpp?ds=inline diff --git a/src/gtk/dnd.cpp b/src/gtk/dnd.cpp index ce49947151..acb68d6af2 100644 --- a/src/gtk/dnd.cpp +++ b/src/gtk/dnd.cpp @@ -1,304 +1,918 @@ /////////////////////////////////////////////////////////////////////////////// -// Name: dnd.cpp +// Name: src/gtk/dnd.cpp // Purpose: wxDropTarget class // Author: Robert Roebling -// Copyright: Robert Roebling -// Licence: wxWindows license +// Id: $Id$ +// Copyright: (c) 1998 Robert Roebling +// Licence: wxWindows licence /////////////////////////////////////////////////////////////////////////////// -#ifdef __GNUG__ -#pragma implementation "dnd.h" -#endif +// For compilers that support precompilation, includes "wx.h". +#include "wx/wxprec.h" + +#if wxUSE_DRAG_AND_DROP #include "wx/dnd.h" -#include "wx/window.h" -#include "wx/app.h" -#include "wx/gdicmn.h" -#include -#include "gdk/gdkprivate.h" +#ifndef WX_PRECOMP + #include "wx/intl.h" + #include "wx/log.h" + #include "wx/app.h" + #include "wx/utils.h" + #include "wx/window.h" + #include "wx/gdicmn.h" +#endif -#include +#include "wx/scopeguard.h" -// ---------------------------------------------------------------------------- -// global -// ---------------------------------------------------------------------------- +#include +#include "wx/gtk/private/gtk2-compat.h" + +//---------------------------------------------------------------------------- +// 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) +#define TRACE_DND "dnd" + +// global variables because GTK+ DnD want to have the +// mouse event that caused it +extern GdkEvent *g_lastMouseEvent; +extern int g_lastButtonNumber; + +//---------------------------------------------------------------------------- +// standard icons +//---------------------------------------------------------------------------- + +/* Copyright (c) Julian Smart */ +static const char * page_xpm[] = { +/* columns rows colors chars-per-pixel */ +"32 32 37 1", +"5 c #7198D9", +", c #769CDA", +"2 c #DCE6F6", +"i c #FFFFFF", +"e c #779DDB", +": c #9AB6E4", +"9 c #EAF0FA", +"- c #B1C7EB", +"$ c #6992D7", +"y c #F7F9FD", +"= c #BED0EE", +"q c #F0F5FC", +"; c #A8C0E8", +"@ c #366BC2", +" c None", +"u c #FDFEFF", +"8 c #5987D3", +"* c #C4D5F0", +"7 c #7CA0DC", +"O c #487BCE", +"< c #6B94D7", +"& c #CCDAF2", +"> c #89A9DF", +"3 c #5584D1", +"w c #82A5DE", +"1 c #3F74CB", +"+ c #3A70CA", +". c #3569BF", +"% c #D2DFF4", +"# c #3366BB", +"r c #F5F8FD", +"0 c #FAFCFE", +"4 c #DFE8F7", +"X c #5E8AD4", +"o c #5282D0", +"t c #B8CCEC", +"6 c #E5EDF9", +/* pixels */ +" ", +" ", +" ", +" ", +" ", +" .XXXooOO++@# ", +" $%&*=-;::>,<1 ", +" $2%&*=-;::><:3 ", +" $42%&*=-;::<&:3 ", +" 56477<<<<8<<9&:X ", +" 59642%&*=-;<09&:5 ", +" 5q9642%&*=-<<<<<# ", +" 5qqw777<<<<<88:>+ ", +" erqq9642%&*=t;::+ ", +" eyrqq9642%&*=t;:O ", +" eyywwww777<<<dropdataavailable.data_type ); - - OnDrop( x, y, (char *)event->dropdataavailable.data); -}; + /* inform the wxDropTarget about the current GdkDragContext. + this is only valid for the duration of this call */ + drop_target->GTKSetDragContext( context ); -void wxDropTarget::UnregisterWidget( GtkWidget *widget ) + /* 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->GTKSetDragContext( NULL ); +} +} + +// ---------------------------------------------------------------------------- +// "drag_motion" +// ---------------------------------------------------------------------------- + +extern "C" { +static gboolean target_drag_motion( GtkWidget *WXUNUSED(widget), + GdkDragContext *context, + gint x, + gint y, + guint time, + wxDropTarget *drop_target ) { - if (!widget) return; - - gtk_widget_dnd_drop_set( widget, FALSE, NULL, 0, FALSE ); -}; + /* Owen Taylor: "if the coordinates not in a drop zone, + return FALSE, otherwise call gtk_drag_status() and + return TRUE" */ + +#if 0 + wxPrintf( "motion\n" ); + GList *tmp_list; + for (tmp_list = context->targets; tmp_list; tmp_list = tmp_list->next) + { + wxString atom = wxString::FromAscii( gdk_atom_name (GDK_POINTER_TO_ATOM (tmp_list->data)) ); + wxPrintf( "Atom: %s\n", atom ); + } +#endif + + // Inform the wxDropTarget about the current GdkDragContext. + // This is only valid for the duration of this call. + drop_target->GTKSetDragContext( context ); -void wxDropTarget::RegisterWidget( GtkWidget *widget ) + // Does the source actually accept the data type? + if (drop_target->GTKGetMatchingPair() == (GdkAtom) 0) + { + drop_target->GTKSetDragContext( NULL ); + return FALSE; + } + + wxDragResult suggested_action = drop_target->GTKFigureOutSuggestedAction(); + + wxDragResult result = wxDragNone; + + if (drop_target->m_firstMotion) + { + // the first "drag_motion" event substitutes a "drag_enter" event + result = drop_target->OnEnter( x, y, suggested_action ); + } + else + { + // give program a chance to react (i.e. to say no by returning FALSE) + result = drop_target->OnDragOver( x, y, suggested_action ); + } + + GdkDragAction result_action = GDK_ACTION_DEFAULT; + if (result == wxDragCopy) + result_action = GDK_ACTION_COPY; + else if (result == wxDragLink) + result_action = GDK_ACTION_LINK; + else + result_action = GDK_ACTION_MOVE; + + // is result action actually supported + bool ret = (result_action != GDK_ACTION_DEFAULT) && + (gdk_drag_context_get_actions(context) & result_action); + + if (ret) + gdk_drag_status( context, result_action, time ); + + // after this, invalidate the drop_target's GdkDragContext + drop_target->GTKSetDragContext( NULL ); + + // this has to be done because GDK has no "drag_enter" event + drop_target->m_firstMotion = false; + + return ret; +} +} + +// ---------------------------------------------------------------------------- +// "drag_drop" +// ---------------------------------------------------------------------------- + +extern "C" { +static gboolean target_drag_drop( GtkWidget *widget, + GdkDragContext *context, + gint x, + gint y, + guint time, + wxDropTarget *drop_target ) { - wxString formats; - int valid = 0; - - for ( uint i = 0; i < GetFormatCount(); i++ ) - { - wxDataFormat df = GetFormat( i ); - switch (df) + /* 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()" */ + + /* inform the wxDropTarget about the current GdkDragContext. + this is only valid for the duration of this call */ + drop_target->GTKSetDragContext( context ); + + // Does the source actually accept the data type? + if (drop_target->GTKGetMatchingPair() == (GdkAtom) 0) { - case wxDF_TEXT: - if (i > 0) formats += ";"; - formats += "text/plain"; - valid++; - break; - case wxDF_FILENAME: - if (i > 0) formats += ";"; - formats += "url:any"; - valid++; - break; - default: - break; - }; - } - - char *str = WXSTRINGCAST formats; - - gtk_widget_dnd_drop_set( widget, TRUE, &str, valid, FALSE ); -}; + // cancel the whole thing + gtk_drag_finish( context, + FALSE, // no success + FALSE, // don't delete data on dropping side + time ); + + drop_target->GTKSetDragContext( NULL ); + + drop_target->m_firstMotion = true; + + return FALSE; + } + + /* inform the wxDropTarget about the current drag widget. + this is only valid for the duration of this call */ + drop_target->GTKSetDragWidget( widget ); + + /* inform the wxDropTarget about the current drag time. + this is only valid for the duration of this call */ + drop_target->GTKSetDragTime( time ); + + /* 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) + { + 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 ); + } + else + { + wxLogTrace(TRACE_DND, wxT( "Drop target: OnDrop returned true") ); + + GdkAtom format = drop_target->GTKGetMatchingPair(); + + // this does happen somehow, see bug 555111 + wxCHECK_MSG( format, FALSE, wxT("no matching GdkAtom for format?") ); + + /* this should trigger an "drag_data_received" event */ + gtk_drag_get_data( widget, + context, + format, + time ); + } + + /* after this, invalidate the drop_target's GdkDragContext */ + drop_target->GTKSetDragContext( NULL ); + + /* after this, invalidate the drop_target's drag widget */ + drop_target->GTKSetDragWidget( NULL ); + + /* this has to be done because GDK has no "drag_enter" event */ + drop_target->m_firstMotion = true; + + return ret; +} +} // ---------------------------------------------------------------------------- -// wxTextDropTarget +// "drag_data_received" // ---------------------------------------------------------------------------- -bool wxTextDropTarget::OnDrop( long x, long y, const void *pData ) +extern "C" { +static void target_drag_data_received( GtkWidget *WXUNUSED(widget), + GdkDragContext *context, + gint x, + gint y, + GtkSelectionData *data, + guint WXUNUSED(info), + guint time, + wxDropTarget *drop_target ) { - OnDropText( x, y, (const char*)pData ); - return TRUE; -}; + /* Owen Taylor: "call gtk_drag_finish() with + success == TRUE" */ + + if (gtk_selection_data_get_length(data) <= 0 || gtk_selection_data_get_format(data) != 8) + { + /* negative data length and non 8-bit data format + qualifies for junk */ + gtk_drag_finish (context, FALSE, FALSE, time); + + return; + } + + wxLogTrace(TRACE_DND, wxT( "Drop target: data received event") ); -bool wxTextDropTarget::OnDropText( long x, long y, const char *psz ) + /* inform the wxDropTarget about the current GtkSelectionData. + this is only valid for the duration of this call */ + drop_target->GTKSetDragData( data ); + + wxDragResult result = ConvertFromGTK(gdk_drag_context_get_selected_action(context)); + + if ( wxIsDragResultOk( drop_target->OnData( x, y, result ) ) ) + { + wxLogTrace(TRACE_DND, wxT( "Drop target: OnData returned true") ); + + /* tell GTK that data transfer was successful */ + gtk_drag_finish( context, TRUE, FALSE, time ); + } + else + { + wxLogTrace(TRACE_DND, wxT( "Drop target: OnData returned FALSE") ); + + /* tell GTK that data transfer was not successful */ + gtk_drag_finish( context, FALSE, FALSE, time ); + } + + /* after this, invalidate the drop_target's drag data */ + drop_target->GTKSetDragData( NULL ); +} +} + +//---------------------------------------------------------------------------- +// wxDropTarget +//---------------------------------------------------------------------------- + +wxDropTarget::wxDropTarget( wxDataObject *data ) + : wxDropTargetBase( data ) { - printf( "Got dropped text: %s.\n", psz ); - printf( "At x: %d, y: %d.\n", (int)x, (int)y ); - return TRUE; -}; + m_firstMotion = true; + m_dragContext = NULL; + m_dragWidget = NULL; + m_dragData = NULL; + m_dragTime = 0; +} -size_t wxTextDropTarget::GetFormatCount() const +wxDragResult wxDropTarget::OnDragOver( wxCoord WXUNUSED(x), + wxCoord WXUNUSED(y), + wxDragResult def ) { - return 1; + return def; } -wxDataFormat wxTextDropTarget::GetFormat(size_t WXUNUSED(n)) const +bool wxDropTarget::OnDrop( wxCoord WXUNUSED(x), wxCoord WXUNUSED(y) ) { - return wxDF_TEXT; + return true; } -// ---------------------------------------------------------------------------- -// wxFileDropTarget -// ---------------------------------------------------------------------------- +wxDragResult wxDropTarget::OnData( wxCoord WXUNUSED(x), wxCoord WXUNUSED(y), + wxDragResult def ) +{ + return GetData() ? def : wxDragNone; +} -bool wxFileDropTarget::OnDropFiles( long x, long y, size_t nFiles, const char * const WXUNUSED(aszFiles)[] ) +wxDragResult wxDropTarget::GTKFigureOutSuggestedAction() { - printf( "Got %d dropped files.\n", (int)nFiles ); - printf( "At x: %d, y: %d.\n", (int)x, (int)y ); - return TRUE; + if (!m_dragContext) + return wxDragError; + + // 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 suggested_action = wxDragNone; + const GdkDragAction actions = gdk_drag_context_get_actions(m_dragContext); + if (GetDefaultAction() == wxDragNone) + { + // use default action set by wxDropSource::DoDragDrop() + if ( (gs_flagsForDrag & wxDrag_DefaultMove) == wxDrag_DefaultMove && + (actions & GDK_ACTION_MOVE)) + { + // move is requested by the program and allowed by GTK+ - do it, even + // though suggested_action may be currently wxDragCopy + suggested_action = wxDragMove; + } + else // use whatever GTK+ says we should + { + suggested_action = ConvertFromGTK(gdk_drag_context_get_suggested_action(m_dragContext)); + +#if 0 + // RR: I don't understand the code below: if the drag comes from + // a different app, the gs_flagsForDrag is invalid; if it + // comes from the same wx app, then GTK+ hopefully won't + // suggest something we didn't allow in the frist place + // in DoDrop() + if ( (suggested_action == wxDragMove) && !(gs_flagsForDrag & wxDrag_AllowMove) ) + { + // we're requested to move but we can't + suggested_action = wxDragCopy; + } +#endif + } + } + else if (GetDefaultAction() == wxDragMove && + (actions & GDK_ACTION_MOVE)) + { + + suggested_action = wxDragMove; + } + else + { + if (actions & GDK_ACTION_COPY) + suggested_action = wxDragCopy; + else if (actions & GDK_ACTION_MOVE) + suggested_action = wxDragMove; + else if (actions & GDK_ACTION_LINK) + suggested_action = wxDragLink; + else + suggested_action = wxDragNone; + } + + return suggested_action; } -bool wxFileDropTarget::OnDrop(long x, long y, const void *WXUNUSED(pData) ) +wxDataFormat wxDropTarget::GetMatchingPair() { - char *str = "/this/is/a/path.txt"; + return wxDataFormat( GTKGetMatchingPair() ); +} + +GdkAtom wxDropTarget::GTKGetMatchingPair(bool quiet) +{ + if (!m_dataObject) + return (GdkAtom) 0; + + if (!m_dragContext) + return (GdkAtom) 0; + + const GList* child = gdk_drag_context_list_targets(m_dragContext); + while (child) + { + GdkAtom formatAtom = (GdkAtom)(child->data); + wxDataFormat format( formatAtom ); + + if ( !quiet ) + { + wxLogTrace(TRACE_DND, wxT("Drop target: drag has format: %s"), + format.GetId().c_str()); + } + + if (m_dataObject->IsSupportedFormat( format )) + return formatAtom; + + child = child->next; + } + + return (GdkAtom) 0; +} + +bool wxDropTarget::GetData() +{ + if (!m_dragData) + return false; + + if (!m_dataObject) + return false; - return OnDropFiles(x, y, 1, &str ); + wxDataFormat dragFormat(gtk_selection_data_get_target(m_dragData)); + + if (!m_dataObject->IsSupportedFormat( dragFormat )) + return false; + + m_dataObject->SetData(dragFormat, + (size_t)gtk_selection_data_get_length(m_dragData), + (const void*)gtk_selection_data_get_data(m_dragData)); + + return true; } -size_t wxFileDropTarget::GetFormatCount() const +void wxDropTarget::GtkUnregisterWidget( GtkWidget *widget ) { - return 1; + wxCHECK_RET( widget != NULL, wxT("unregister widget is NULL") ); + + gtk_drag_dest_unset( widget ); + + g_signal_handlers_disconnect_by_func (widget, + (gpointer) target_drag_leave, this); + g_signal_handlers_disconnect_by_func (widget, + (gpointer) target_drag_motion, this); + g_signal_handlers_disconnect_by_func (widget, + (gpointer) target_drag_drop, this); + g_signal_handlers_disconnect_by_func (widget, + (gpointer) target_drag_data_received, this); } -wxDataFormat wxFileDropTarget::GetFormat(size_t WXUNUSED(n)) const +void wxDropTarget::GtkRegisterWidget( GtkWidget *widget ) { - return wxDF_FILENAME; + wxCHECK_RET( widget != NULL, wxT("register widget is NULL") ); + + /* 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 */ + NULL, /* we don't supply any formats here */ + 0, /* number of targets = 0 */ + (GdkDragAction) 0 ); /* we don't supply any actions here */ + + g_signal_connect (widget, "drag_leave", + G_CALLBACK (target_drag_leave), this); + + g_signal_connect (widget, "drag_motion", + G_CALLBACK (target_drag_motion), this); + + g_signal_connect (widget, "drag_drop", + G_CALLBACK (target_drag_drop), this); + + g_signal_connect (widget, "drag_data_received", + G_CALLBACK (target_drag_data_received), this); } -//------------------------------------------------------------------------- -// wxDropSource -//------------------------------------------------------------------------- +//---------------------------------------------------------------------------- +// "drag_data_get" +//---------------------------------------------------------------------------- + +extern "C" { +static void +source_drag_data_get (GtkWidget *WXUNUSED(widget), + GdkDragContext *context, + GtkSelectionData *selection_data, + guint WXUNUSED(info), + guint WXUNUSED(time), + wxDropSource *drop_source ) +{ + wxDataFormat format(gtk_selection_data_get_target(selection_data)); + + wxLogTrace(TRACE_DND, wxT("Drop source: format requested: %s"), + format.GetId().c_str()); + + drop_source->m_retValue = wxDragError; + + wxDataObject *data = drop_source->GetDataObject(); + if (!data) + { + wxLogTrace(TRACE_DND, wxT("Drop source: no data object") ); + return; + } + + if (!data->IsSupportedFormat(format)) + { + wxLogTrace(TRACE_DND, wxT("Drop source: unsupported format") ); + return; + } + + if (data->GetDataSize(format) == 0) + { + wxLogTrace(TRACE_DND, wxT("Drop source: empty data") ); + return; + } + + 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; + } + + drop_source->m_retValue = ConvertFromGTK(gdk_drag_context_get_selected_action(context)); + + gtk_selection_data_set( selection_data, + gtk_selection_data_get_target(selection_data), + 8, // 8-bit + d, + size ); + + delete[] d; +} +} + +//---------------------------------------------------------------------------- +// "drag_end" +//---------------------------------------------------------------------------- + +extern "C" { +static void source_drag_end( GtkWidget *WXUNUSED(widget), + GdkDragContext *WXUNUSED(context), + wxDropSource *drop_source ) +{ + drop_source->m_waiting = false; +} +} + +//----------------------------------------------------------------------------- +// "configure_event" from m_iconWindow //----------------------------------------------------------------------------- -// drag request -void gtk_drag_callback( GtkWidget *widget, GdkEvent *event, wxDropSource *source ) +extern "C" { +static gint +gtk_dnd_window_configure_callback( GtkWidget *WXUNUSED(widget), GdkEventConfigure *WXUNUSED(event), wxDropSource *source ) { - printf( "Data requested for dropping.\n" ); - - wxDataObject *data = source->m_data; - - uint 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 = wxDropSource::Copy; -}; + source->GiveFeedback(ConvertFromGTK(gdk_drag_context_get_selected_action(source->m_dragContext))); + + return 0; +} +} + +//--------------------------------------------------------------------------- +// wxDropSource +//--------------------------------------------------------------------------- -wxDropSource::wxDropSource( wxWindow *win ) +wxDropSource::wxDropSource(wxWindow *win, + const wxIcon &iconCopy, + const wxIcon &iconMove, + const wxIcon &iconNone) { - g_blockEventsOnDrag = TRUE; - - m_window = win; - m_widget = win->m_widget; - if (win->m_wxwindow) m_widget = win->m_wxwindow; - - m_data = NULL; - m_retValue = Cancel; - - m_defaultCursor = wxCursor( wxCURSOR_NO_ENTRY ); - m_goaheadCursor = wxCursor( wxCURSOR_HAND ); -}; + m_waiting = true; + + m_iconWindow = NULL; + + m_window = win; + m_widget = win->m_widget; + if (win->m_wxwindow) m_widget = win->m_wxwindow; + + m_retValue = wxDragNone; -wxDropSource::wxDropSource( wxDataObject &data, wxWindow *win ) + SetIcons(iconCopy, iconMove, iconNone); +} + +wxDropSource::wxDropSource(wxDataObject& data, + wxWindow *win, + const wxIcon &iconCopy, + const wxIcon &iconMove, + const wxIcon &iconNone) { - g_blockEventsOnDrag = TRUE; - - m_window = win; - m_widget = win->m_widget; - if (win->m_wxwindow) m_widget = win->m_wxwindow; - m_retValue = Cancel; - - m_data = &data; - - m_defaultCursor = wxCursor( wxCURSOR_NO_ENTRY ); - m_goaheadCursor = wxCursor( wxCURSOR_HAND ); -}; + m_waiting = true; + + SetData( data ); -void wxDropSource::SetData( wxDataObject &data ) + m_iconWindow = NULL; + + m_window = win; + m_widget = win->m_widget; + if (win->m_wxwindow) m_widget = win->m_wxwindow; + + m_retValue = wxDragNone; + + SetIcons(iconCopy, iconMove, iconNone); +} + +void wxDropSource::SetIcons(const wxIcon &iconCopy, + const wxIcon &iconMove, + const wxIcon &iconNone) { - m_data = &data; -}; + m_iconCopy = iconCopy; + m_iconMove = iconMove; + m_iconNone = iconNone; + + if ( !m_iconCopy.IsOk() ) + m_iconCopy = wxIcon(page_xpm); + if ( !m_iconMove.IsOk() ) + m_iconMove = m_iconCopy; + if ( !m_iconNone.IsOk() ) + m_iconNone = m_iconCopy; +} -wxDropSource::~wxDropSource(void) +wxDropSource::~wxDropSource() { -// if (m_data) delete m_data; +} - g_blockEventsOnDrag = FALSE; -}; - -wxDropSource::DragResult wxDropSource::DoDragDrop( bool WXUNUSED(bAllowMove) ) +void wxDropSource::PrepareIcon( int action, GdkDragContext *context ) { - if (gdk_dnd.dnd_grabbed) return None; - if (gdk_dnd.drag_really) return None; - - wxASSERT_MSG( data, "wxDragSource: no data" ); - - if (!m_data) return None; - if (m_data->GetDataSize() == 0) return None; - - 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 = 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, NULL ); - - gdk_dnd_display_drag_cursor( x, y, FALSE, TRUE ); - - while (gdk_dnd.drag_really || gdk_dnd.drag_perhaps) wxYield(); - - UnregisterWindow(); - - return m_retValue; -}; + // 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; + +#ifndef __WXGTK3__ + GdkBitmap *mask; + if ( icon->GetMask() ) + mask = icon->GetMask()->GetBitmap(); + else + mask = NULL; + + GdkPixmap *pixmap = icon->GetPixmap(); + + GdkColormap *colormap = gtk_widget_get_colormap( m_widget ); + gtk_widget_push_colormap (colormap); +#endif -void wxDropSource::RegisterWindow(void) + 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 (m_iconWindow, TRUE); + +#ifdef __WXGTK3__ + gtk_widget_set_visual(m_iconWindow, gtk_widget_get_visual(m_widget)); +#else + gtk_widget_pop_colormap (); +#endif + + gtk_widget_set_size_request (m_iconWindow, icon->GetWidth(), icon->GetHeight()); + gtk_widget_realize (m_iconWindow); + + g_signal_connect (m_iconWindow, "configure_event", + G_CALLBACK (gtk_dnd_window_configure_callback), this); + +#ifdef __WXGTK3__ + cairo_t* cr = gdk_cairo_create(gtk_widget_get_window(m_iconWindow)); + icon->SetSourceSurface(cr, 0, 0); + cairo_pattern_t* pattern = cairo_get_source(cr); + gdk_window_set_background_pattern(gtk_widget_get_window(m_iconWindow), pattern); + cairo_destroy(cr); + cairo_surface_t* mask = icon->GetMask()->GetBitmap(); + if (mask) + { + cairo_region_t* region = gdk_cairo_region_create_from_surface(mask); + gtk_widget_shape_combine_region(m_iconWindow, region); + cairo_region_destroy(region); + } +#else + gdk_window_set_back_pixmap(gtk_widget_get_window(m_iconWindow), pixmap, false); + + if (mask) + gtk_widget_shape_combine_mask (m_iconWindow, mask, 0, 0); +#endif + + gtk_drag_set_icon_widget( context, m_iconWindow, 0, 0 ); +} + +wxDragResult wxDropSource::DoDragDrop(int flags) { - if (!m_data) return; + wxCHECK_MSG( m_data && m_data->GetFormatCount(), wxDragNone, + wxT("Drop source: no data") ); + + // still in drag + if (g_blockEventsOnDrag) + return wxDragNone; + + // don't start dragging if no button is down + if (g_lastButtonNumber == 0) + return wxDragNone; - wxString formats; - - wxDataFormat df = m_data->GetPreferredFormat(); - - switch (df) + // we can only start a drag after a mouse event + if (g_lastMouseEvent == NULL) + return wxDragNone; + + GTKConnectDragSignals(); + wxON_BLOCK_EXIT_OBJ0(*this, wxDropSource::GTKDisconnectDragSignals); + + m_waiting = true; + + GtkTargetList *target_list = gtk_target_list_new( 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++) { - case wxDF_TEXT: - formats += "text/plain"; - break; - case wxDF_FILENAME: - formats += "url:any"; - break; - default: - break; + 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 ); } - - char *str = WXSTRINGCAST formats; - - gtk_widget_dnd_drag_set( m_widget, TRUE, &str, 1 ); + delete[] array; - gtk_signal_connect( GTK_OBJECT(m_widget), "drag_request_event", - GTK_SIGNAL_FUNC(gtk_drag_callback), (gpointer)this ); -}; + int allowed_actions = GDK_ACTION_COPY; + if ( flags & wxDrag_AllowMove ) + allowed_actions |= GDK_ACTION_MOVE; + + // 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; + + m_retValue = wxDragCancel; + + GdkDragContext *context = gtk_drag_begin( m_widget, + target_list, + (GdkDragAction)allowed_actions, + g_lastButtonNumber, // number of mouse button which started drag + (GdkEvent*) g_lastMouseEvent ); + + if ( !context ) + { + // this can happen e.g. if gdk_pointer_grab() failed + return wxDragError; + } + + m_dragContext = context; + + PrepareIcon( allowed_actions, context ); + + while (m_waiting) + gtk_main_iteration(); + + g_signal_handlers_disconnect_by_func (m_iconWindow, + (gpointer) gtk_dnd_window_configure_callback, this); -void wxDropSource::UnregisterWindow(void) + return m_retValue; +} + +void wxDropSource::GTKConnectDragSignals() { - if (!m_widget) return; - - gtk_widget_dnd_drag_set( m_widget, FALSE, NULL, 0 ); - - gtk_signal_disconnect_by_data( GTK_OBJECT(m_widget), (gpointer)this ); -}; + if (!m_widget) + return; + + g_blockEventsOnDrag = true; + + g_signal_connect (m_widget, "drag_data_get", + G_CALLBACK (source_drag_data_get), this); + g_signal_connect (m_widget, "drag_end", + G_CALLBACK (source_drag_end), this); + +} + +void wxDropSource::GTKDisconnectDragSignals() +{ + if (!m_widget) + return; + + g_blockEventsOnDrag = false; + + g_signal_handlers_disconnect_by_func (m_widget, + (gpointer) source_drag_data_get, + this); + g_signal_handlers_disconnect_by_func (m_widget, + (gpointer) source_drag_end, + this); +} + +#endif + // wxUSE_DRAG_AND_DROP