X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/90e586840b79c936751bf8305ea4f51c6c283791..7d6a4d96961eac84d05db8bb24c64d39003f6e54:/src/gtk/dnd.cpp diff --git a/src/gtk/dnd.cpp b/src/gtk/dnd.cpp index 0bfbbc7bde..acb68d6af2 100644 --- a/src/gtk/dnd.cpp +++ b/src/gtk/dnd.cpp @@ -1,32 +1,32 @@ /////////////////////////////////////////////////////////////////////////////// -// Name: dnd.cpp +// Name: src/gtk/dnd.cpp // Purpose: wxDropTarget class // Author: Robert Roebling // Id: $Id$ // Copyright: (c) 1998 Robert Roebling -// Licence: wxWindows licence +// Licence: wxWindows licence /////////////////////////////////////////////////////////////////////////////// -#ifdef __GNUG__ -#pragma implementation "dnd.h" -#endif - -#include "wx/dnd.h" +// For compilers that support precompilation, includes "wx.h". +#include "wx/wxprec.h" #if wxUSE_DRAG_AND_DROP -#include "wx/window.h" -#include "wx/app.h" -#include "wx/gdicmn.h" -#include "wx/intl.h" -#include "wx/utils.h" +#include "wx/dnd.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 "gdk/gdk.h" -#include "gtk/gtk.h" -#include "gdk/gdkprivate.h" +#include "wx/scopeguard.h" -#include "gtk/gtkdnd.h" -#include "gtk/gtkselection.h" +#include +#include "wx/gtk/private/gtk2-compat.h" //---------------------------------------------------------------------------- // global data @@ -34,827 +34,885 @@ 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 //---------------------------------------------------------------------------- -/* XPM */ -static char * gv_xpm[] = { -"40 34 3 1", -" s None c None", -". c black", -"X c white", -" ", -" ", -" ...... ", -" ..XXXXXX.. ", -" .XXXXXXXXXX. ", -" .XXXXXXXXXXXX. ", -" .XXXXXXXXXXXX. ", -" .XXXXXXXXXXXXXX. ", -" .XXX..XXXX..XXX. ", -" ....XX....XX....XX. ", -" .XXX.XXX..XXXX..XXX.... ", -" .XXXXXXXXXXXXXXXXXXX.XXX. ", -" .XXXXXXXXXXXXXXXXXXXXXXXX. ", -" .XXXXXXXXXXXXXXXXXXXXXXXX. ", -" ..XXXXXXXXXXXXXXXXXXXXXX. ", -" .XXXXXXXXXXXXXXXXXX... ", -" ..XXXXXXXXXXXXXXXX. ", -" .XXXXXXXXXXXXXXXX. ", -" .XXXXXXXXXXXXXXXX. ", -" .XXXXXXXXXXXXXXXXX. ", -" .XXXXXXXXXXXXXXXXX. ", -" .XXXXXXXXXXXXXXXXXX. ", -" .XXXXXXXXXXXXXXXXXXX. ", -" .XXXXXXXXXXXXXXXXXXXXX. ", -" .XXXXXXXXXXXXXX.XXXXXXX. ", -" .XXXXXXX.XXXXXXX.XXXXXXX. ", -" .XXXXXXXX.XXXXXXX.XXXXXXX. ", -" .XXXXXXX...XXXXX...XXXXX. ", -" .XXXXXXX. ..... ..... ", -" ..XXXX.. ", -" .... ", -" ", -" ", -" "}; - -/* XPM */ -static 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", +/* 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 */ -" ................... ", -" .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. ", -" ......................... "}; - - +" ", +" ", +" ", +" ", +" ", +" .XXXooOO++@# ", +" $%&*=-;::>,<1 ", +" $2%&*=-;::><:3 ", +" $42%&*=-;::<&:3 ", +" 56477<<<<8<<9&:X ", +" 59642%&*=-;<09&:5 ", +" 5q9642%&*=-<<<<<# ", +" 5qqw777<<<<<88:>+ ", +" erqq9642%&*=t;::+ ", +" eyrqq9642%&*=t;:O ", +" eyywwww777<<<SetDragContext( context ); - + drop_target->GTKSetDragContext( 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; - + drop_target->m_firstMotion = true; + /* after this, invalidate the drop_target's GdkDragContext */ - drop_target->SetDragContext( (GdkDragContext*) NULL ); + 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 ) + GdkDragContext *context, + gint x, + gint y, + guint time, + wxDropTarget *drop_target ) { /* 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 ); - + +#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 ); + + // 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 */ - drop_target->OnEnter(); + // the first "drag_motion" event substitutes a "drag_enter" event + result = drop_target->OnEnter( x, y, suggested_action ); } - - /* give program a chance to react (i.e. to say no by returning FALSE) */ - bool ret = drop_target->OnMove( x, y ); - - /* we don't yet handle which "actions" (i.e. copy or move) - the target accepts. so far we simply accept the - suggested action. TODO. */ + 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, context->suggested_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; - + 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 ) + GdkDragContext *context, + gint x, + gint y, + guint time, + wxDropTarget *drop_target ) { /* 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 ); - + drop_target->GTKSetDragContext( context ); + + // Does the source actually accept the data type? + if (drop_target->GTKGetMatchingPair() == (GdkAtom) 0) + { + // 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->SetDragWidget( widget ); - + drop_target->GTKSetDragWidget( widget ); + /* inform the wxDropTarget about the current drag time. this is only valid for the duration of this call */ - drop_target->SetDragTime( time ); - + 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 ); + 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->SetDragContext( (GdkDragContext*) NULL ); - + drop_target->GTKSetDragContext( NULL ); + /* after this, invalidate the drop_target's drag widget */ - drop_target->SetDragWidget( (GtkWidget*) NULL ); - + drop_target->GTKSetDragWidget( NULL ); + /* this has to be done because GDK has no "drag_enter" event */ - drop_target->m_firstMotion = TRUE; - + drop_target->m_firstMotion = true; + return ret; } +} // ---------------------------------------------------------------------------- // "drag_data_received" // ---------------------------------------------------------------------------- +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 ) + GdkDragContext *context, + gint x, + gint y, + GtkSelectionData *data, + guint WXUNUSED(info), + guint time, + wxDropTarget *drop_target ) { /* Owen Taylor: "call gtk_drag_finish() with success == TRUE" */ -// printf( "data received.\n" ); - - if ((data->length <= 0) || (data->format != 8)) + 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); - -// printf( "no data.\n" ); - - return; + + return; } - + + wxLogTrace(TRACE_DND, wxT( "Drop target: data received event") ); + /* inform the wxDropTarget about the current GtkSelectionData. this is only valid for the duration of this call */ - drop_target->SetDragData( data ); - - if (drop_target->OnData( x, y )) + drop_target->GTKSetDragData( data ); + + wxDragResult result = ConvertFromGTK(gdk_drag_context_get_selected_action(context)); + + if ( wxIsDragResultOk( drop_target->OnData( x, y, result ) ) ) { - /* tell GTK that data transfer was successfull */ + wxLogTrace(TRACE_DND, wxT( "Drop target: OnData returned true") ); + + /* tell GTK that data transfer was successful */ gtk_drag_finish( context, TRUE, FALSE, time ); } else { - /* tell GTK that data transfer was not successfull */ + 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->SetDragData( (GtkSelectionData*) NULL ); + drop_target->GTKSetDragData( NULL ); +} } //---------------------------------------------------------------------------- // wxDropTarget //---------------------------------------------------------------------------- -wxDropTarget::wxDropTarget() +wxDropTarget::wxDropTarget( wxDataObject *data ) + : wxDropTargetBase( data ) { - m_firstMotion = TRUE; - m_dragContext = (GdkDragContext*) NULL; - m_dragWidget = (GtkWidget*) NULL; - m_dragData = (GtkSelectionData*) NULL; + m_firstMotion = true; + m_dragContext = NULL; + m_dragWidget = NULL; + m_dragData = NULL; m_dragTime = 0; } -wxDropTarget::~wxDropTarget() +wxDragResult wxDropTarget::OnDragOver( wxCoord WXUNUSED(x), + wxCoord WXUNUSED(y), + wxDragResult def ) { + return def; } -void wxDropTarget::OnEnter() +bool wxDropTarget::OnDrop( wxCoord WXUNUSED(x), wxCoord WXUNUSED(y) ) { + return true; } -void wxDropTarget::OnLeave() +wxDragResult wxDropTarget::OnData( wxCoord WXUNUSED(x), wxCoord WXUNUSED(y), + wxDragResult def ) { + return GetData() ? def : wxDragNone; } -bool wxDropTarget::OnMove( int WXUNUSED(x), int WXUNUSED(y) ) +wxDragResult wxDropTarget::GTKFigureOutSuggestedAction() { - return TRUE; -} + if (!m_dragContext) + return wxDragError; -bool wxDropTarget::OnDrop( int WXUNUSED(x), int WXUNUSED(y) ) -{ - return FALSE; + // 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 wxDropTarget::OnData( int WXUNUSED(x), int WXUNUSED(y) ) +wxDataFormat wxDropTarget::GetMatchingPair() { - return FALSE; + return wxDataFormat( GTKGetMatchingPair() ); } -bool wxDropTarget::RequestData( wxDataFormat format ) +GdkAtom wxDropTarget::GTKGetMatchingPair(bool quiet) { - if (!m_dragContext) return FALSE; - if (!m_dragWidget) return FALSE; - -/* - wxPrintf( _T("format: %s.\n"), format.GetId().c_str() ); - if (format.GetType() == wxDF_PRIVATE) wxPrintf( _T("private data.\n") ); - if (format.GetType() == wxDF_TEXT) wxPrintf( _T("text data.\n") ); -*/ - - /* this should trigger an "drag_data_received" event */ - gtk_drag_get_data( m_dragWidget, - m_dragContext, - format.GetAtom(), - m_dragTime ); - - return TRUE; -} - -bool wxDropTarget::IsSupported( wxDataFormat format ) -{ - if (!m_dragContext) return FALSE; - - GList *child = m_dragContext->targets; + 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) GPOINTER_TO_INT(child->data); - -// char *name = gdk_atom_name( formatAtom ); -// if (name) printf( "Format available: %s.\n", name ); - - if (formatAtom == format.GetAtom()) return TRUE; + 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 FALSE; + return (GdkAtom) 0; } - -bool wxDropTarget::GetData( wxDataObject *data_object ) + +bool wxDropTarget::GetData() { - if (!m_dragData) return FALSE; - - if (m_dragData->target != data_object->GetFormat().GetAtom()) return FALSE; - - if (data_object->GetFormat().GetType() == wxDF_TEXT) - { - wxTextDataObject *text_object = (wxTextDataObject*)data_object; - text_object->SetText( (const char*)m_dragData->data ); - } else - - if (data_object->GetFormat().GetType() == wxDF_FILENAME) - { - } else - - if (data_object->GetFormat().GetType() == wxDF_PRIVATE) - { - wxPrivateDataObject *priv_object = (wxPrivateDataObject*)data_object; - priv_object->SetData( (const char*)m_dragData->data, (size_t)m_dragData->length ); - } - - return TRUE; + if (!m_dragData) + return false; + + if (!m_dataObject) + return false; + + 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; } - -void wxDropTarget::UnregisterWidget( GtkWidget *widget ) -{ - wxCHECK_RET( widget != NULL, _T("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 ); +void wxDropTarget::GtkUnregisterWidget( GtkWidget *widget ) +{ + wxCHECK_RET( widget != NULL, wxT("unregister widget is NULL") ); - gtk_signal_disconnect_by_func( GTK_OBJECT(widget), - GTK_SIGNAL_FUNC(target_drag_drop), (gpointer) this ); + gtk_drag_dest_unset( widget ); - gtk_signal_disconnect_by_func( GTK_OBJECT(widget), - GTK_SIGNAL_FUNC(target_drag_data_received), (gpointer) this ); + 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); } -void wxDropTarget::RegisterWidget( GtkWidget *widget ) +void wxDropTarget::GtkRegisterWidget( GtkWidget *widget ) { - wxCHECK_RET( widget != NULL, _T("register widget is NULL") ); - + 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 + 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_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 */ - gtk_signal_connect( GTK_OBJECT(widget), "drag_drop", - GTK_SIGNAL_FUNC(target_drag_drop), (gpointer) this ); + g_signal_connect (widget, "drag_leave", + G_CALLBACK (target_drag_leave), this); - gtk_signal_connect( GTK_OBJECT(widget), "drag_data_received", - GTK_SIGNAL_FUNC(target_drag_data_received), (gpointer) this ); -} + g_signal_connect (widget, "drag_motion", + G_CALLBACK (target_drag_motion), this); -//------------------------------------------------------------------------- -// wxTextDropTarget -//------------------------------------------------------------------------- + g_signal_connect (widget, "drag_drop", + G_CALLBACK (target_drag_drop), this); -bool wxTextDropTarget::OnMove( int WXUNUSED(x), int WXUNUSED(y) ) -{ - return IsSupported( wxDF_TEXT ); + g_signal_connect (widget, "drag_data_received", + G_CALLBACK (target_drag_data_received), this); } -bool wxTextDropTarget::OnDrop( int WXUNUSED(x), int WXUNUSED(y) ) -{ - if (IsSupported( wxDF_TEXT )) - { - RequestData( wxDF_TEXT ); - return TRUE; - } - - return FALSE; -} +//---------------------------------------------------------------------------- +// "drag_data_get" +//---------------------------------------------------------------------------- -bool wxTextDropTarget::OnData( int x, int y ) +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 ) { - wxTextDataObject data; - if (!GetData( &data )) return FALSE; - - OnDropText( x, y, data.GetText() ); - - return TRUE; -} + wxDataFormat format(gtk_selection_data_get_target(selection_data)); -//------------------------------------------------------------------------- -// wxPrivateDropTarget -//------------------------------------------------------------------------- + wxLogTrace(TRACE_DND, wxT("Drop source: format requested: %s"), + format.GetId().c_str()); -wxPrivateDropTarget::wxPrivateDropTarget() -{ - m_id = wxTheApp->GetAppName(); -} - -wxPrivateDropTarget::wxPrivateDropTarget( const wxString &id ) -{ - m_id = id; -} + drop_source->m_retValue = wxDragError; -bool wxPrivateDropTarget::OnMove( int WXUNUSED(x), int WXUNUSED(y) ) -{ - return IsSupported( m_id ); -} + wxDataObject *data = drop_source->GetDataObject(); -bool wxPrivateDropTarget::OnDrop( int WXUNUSED(x), int WXUNUSED(y) ) -{ - if (!IsSupported( m_id )) - { - RequestData( m_id ); - return FALSE; + if (!data) + { + wxLogTrace(TRACE_DND, wxT("Drop source: no data object") ); + return; } - - return FALSE; -} - -bool wxPrivateDropTarget::OnData( int x, int y ) -{ - if (!IsSupported( m_id )) return FALSE; - - wxPrivateDataObject data; - if (!GetData( &data )) return FALSE; - - OnDropData( x, y, data.GetData(), data.GetSize() ); - - return TRUE; -} - -//---------------------------------------------------------------------------- -// A drop target which accepts files (dragged from File Manager or Explorer) -//---------------------------------------------------------------------------- - -bool wxFileDropTarget::OnMove( int WXUNUSED(x), int WXUNUSED(y) ) -{ - return IsSupported( wxDF_FILENAME ); -} -bool wxFileDropTarget::OnDrop( int x, int y ) -{ - if (IsSupported( wxDF_FILENAME )) + if (!data->IsSupportedFormat(format)) { - RequestData( wxDF_FILENAME ); - return TRUE; + wxLogTrace(TRACE_DND, wxT("Drop source: unsupported format") ); + return; } - - return FALSE; -} -bool wxFileDropTarget::OnData( int x, int y ) -{ - wxFileDataObject data; - if (!GetData( &data )) return FALSE; - - /* get number of substrings /root/mytext.txt/0/root/myothertext.txt/0/0 */ - size_t number = 0; - size_t i; - size_t size = data.GetFiles().Length(); - wxChar *text = WXSTRINGCAST data.GetFiles(); - for ( i = 0; i < size; i++) - if (text[i] == 0) number++; - - if (number == 0) return FALSE; - - wxChar **files = new wxChar*[number]; - - text = WXSTRINGCAST data.GetFiles(); - for (i = 0; i < number; i++) + if (data->GetDataSize(format) == 0) { - files[i] = text; - int len = wxStrlen( text ); - text += len+1; + wxLogTrace(TRACE_DND, wxT("Drop source: empty data") ); + return; } - OnDropFiles( x, y, number, files ); - - free( files ); - - return TRUE; -} + size_t size = data->GetDataSize(format); -//---------------------------------------------------------------------------- -// "drag_data_get" -//---------------------------------------------------------------------------- +// printf( "data size: %d.\n", (int)data_size ); -static void -source_drag_data_get (GtkWidget *WXUNUSED(widget), - GdkDragContext *context, - GtkSelectionData *selection_data, - guint WXUNUSED(info), - guint WXUNUSED(time), - wxDropSource *drop_source ) -{ -// printf( "Provide data!\n" ); + guchar *d = new guchar[size]; -// char *name = gdk_atom_name( selection_data->target ); -// if (name) printf( "Format requested: %s.\n", name ); - - wxNode *node = drop_source->m_data->m_dataObjects.First(); - while (node) + if (!data->GetDataHere( format, (void*)d )) { - wxDataObject *data_object = (wxDataObject*) node->Data(); - if (data_object->GetFormat().GetAtom() == selection_data->target) - { -// printf( "format found.\n" ); - - size_t data_size = data_object->GetSize(); - - if (data_size > 0) - { -// printf( "data size: %d.\n", (int)data_size ); - - guchar *buffer = new guchar[data_size]; - data_object->WriteData( buffer ); - - gtk_selection_data_set( selection_data, - selection_data->target, - 8, /* 8-bit */ - buffer, - data_size ); - - free( buffer ); - - /* so far only copy, no moves. TODO. */ - drop_source->m_retValue = wxDragCopy; - - return; - } - } - - node = node->Next(); + delete[] d; + return; } - - drop_source->m_retValue = wxDragCancel; -} - -//---------------------------------------------------------------------------- -// "drag_data_delete" -//---------------------------------------------------------------------------- -static void source_drag_data_delete( GtkWidget *WXUNUSED(widget), - GdkDragContext *WXUNUSED(context), - wxDropSource *drop_source ) -{ -// printf( "Delete the data!\n" ); + drop_source->m_retValue = ConvertFromGTK(gdk_drag_context_get_selected_action(context)); - drop_source->m_retValue = wxDragMove; -} - -//---------------------------------------------------------------------------- -// "drag_begin" -//---------------------------------------------------------------------------- + gtk_selection_data_set( selection_data, + gtk_selection_data_get_target(selection_data), + 8, // 8-bit + d, + size ); -static void source_drag_begin( GtkWidget *WXUNUSED(widget), - GdkDragContext *WXUNUSED(context), - wxDropSource *WXUNUSED(drop_source) ) -{ -// printf( "drag_begin.\n" ); + delete[] d; +} } - + //---------------------------------------------------------------------------- // "drag_end" //---------------------------------------------------------------------------- +extern "C" { static void source_drag_end( GtkWidget *WXUNUSED(widget), - GdkDragContext *WXUNUSED(context), - wxDropSource *drop_source ) + GdkDragContext *WXUNUSED(context), + wxDropSource *drop_source ) { -// printf( "drag_end.\n" ); + drop_source->m_waiting = false; +} +} + +//----------------------------------------------------------------------------- +// "configure_event" from m_iconWindow +//----------------------------------------------------------------------------- - drop_source->m_waiting = FALSE; +extern "C" { +static gint +gtk_dnd_window_configure_callback( GtkWidget *WXUNUSED(widget), GdkEventConfigure *WXUNUSED(event), wxDropSource *source ) +{ + source->GiveFeedback(ConvertFromGTK(gdk_drag_context_get_selected_action(source->m_dragContext))); + + return 0; } - +} + //--------------------------------------------------------------------------- // wxDropSource //--------------------------------------------------------------------------- -wxDropSource::wxDropSource( wxWindow *win, const wxIcon &go, const wxIcon &stop ) +wxDropSource::wxDropSource(wxWindow *win, + const wxIcon &iconCopy, + const wxIcon &iconMove, + const wxIcon &iconNone) { - g_blockEventsOnDrag = TRUE; - m_waiting = TRUE; - + m_waiting = true; + + m_iconWindow = NULL; + m_window = win; m_widget = win->m_widget; if (win->m_wxwindow) m_widget = win->m_wxwindow; - - m_data = (wxDataBroker*) NULL; - m_retValue = wxDragCancel; - m_defaultCursor = wxCursor( wxCURSOR_NO_ENTRY ); - m_goaheadCursor = wxCursor( wxCURSOR_HAND ); - - m_goIcon = go; - if (wxNullIcon == go) m_goIcon = wxIcon( page_xpm ); - m_stopIcon = stop; - if (wxNullIcon == stop) m_stopIcon = wxIcon( gv_xpm ); + m_retValue = wxDragNone; + + SetIcons(iconCopy, iconMove, iconNone); } -wxDropSource::wxDropSource( wxDataObject *data, wxWindow *win, const wxIcon &go, const wxIcon &stop ) +wxDropSource::wxDropSource(wxDataObject& data, + wxWindow *win, + const wxIcon &iconCopy, + const wxIcon &iconMove, + const wxIcon &iconNone) { - m_waiting = TRUE; - + m_waiting = true; + + SetData( data ); + + m_iconWindow = NULL; + m_window = win; m_widget = win->m_widget; if (win->m_wxwindow) m_widget = win->m_wxwindow; - m_retValue = wxDragCancel; - - if (data) - { - m_data = new wxDataBroker(); - m_data->Add( data ); - } - else - { - m_data = (wxDataBroker*) NULL; - } - m_defaultCursor = wxCursor( wxCURSOR_NO_ENTRY ); - m_goaheadCursor = wxCursor( wxCURSOR_HAND ); - - m_goIcon = go; - if (wxNullIcon == go) m_goIcon = wxIcon( page_xpm ); - m_stopIcon = stop; - if (wxNullIcon == stop) m_stopIcon = wxIcon( gv_xpm ); + m_retValue = wxDragNone; + + SetIcons(iconCopy, iconMove, iconNone); } -wxDropSource::wxDropSource( wxDataBroker *data, wxWindow *win ) +void wxDropSource::SetIcons(const wxIcon &iconCopy, + const wxIcon &iconMove, + const wxIcon &iconNone) { - m_window = win; - m_widget = win->m_widget; - if (win->m_wxwindow) m_widget = win->m_wxwindow; - m_retValue = wxDragCancel; - - m_data = data; + m_iconCopy = iconCopy; + m_iconMove = iconMove; + m_iconNone = iconNone; - m_defaultCursor = wxCursor( wxCURSOR_NO_ENTRY ); - m_goaheadCursor = wxCursor( wxCURSOR_HAND ); + 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; } -void wxDropSource::SetData( wxDataObject *data ) +wxDropSource::~wxDropSource() { - if (m_data) delete m_data; - - if (data) - { - m_data = new wxDataBroker(); - m_data->Add( data ); - } +} + +void wxDropSource::PrepareIcon( int action, GdkDragContext *context ) +{ + // 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 + + 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) { - m_data = (wxDataBroker*) NULL; + 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); -void wxDropSource::SetData( wxDataBroker *data ) -{ - if (m_data) delete m_data; - - m_data = data; + if (mask) + gtk_widget_shape_combine_mask (m_iconWindow, mask, 0, 0); +#endif + + gtk_drag_set_icon_widget( context, m_iconWindow, 0, 0 ); } -wxDropSource::~wxDropSource(void) +wxDragResult wxDropSource::DoDragDrop(int flags) { - if (m_data) delete m_data; + wxCHECK_MSG( m_data && m_data->GetFormatCount(), wxDragNone, + wxT("Drop source: no data") ); - g_blockEventsOnDrag = FALSE; -} - -wxDragResult wxDropSource::DoDragDrop( bool WXUNUSED(bAllowMove) ) -{ - wxASSERT_MSG( m_data, _T("wxDragSource: no data") ); - - if (!m_data) return (wxDragResult) wxDragNone; - - g_blockEventsOnDrag = TRUE; - - RegisterWindow(); - - m_waiting = TRUE; - - GtkTargetList *target_list = gtk_target_list_new( (GtkTargetEntry*) NULL, 0 ); - gtk_target_list_add( target_list, gdk_atom_intern( "STRING", FALSE ), 0, 0 ); - - 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; - - /* 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; - - /* don't start dragging if no button is down */ - if (button_number) + // still in drag + if (g_blockEventsOnDrag) + return wxDragNone; + + // don't start dragging if no button is down + if (g_lastButtonNumber == 0) + return wxDragNone; + + // 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++) { - GdkDragContext *context = gtk_drag_begin( m_widget, - target_list, - GDK_ACTION_COPY, - button_number, /* number of mouse button which started drag */ - (GdkEvent*) &event ); - - wxMask *mask = m_goIcon.GetMask(); - GdkBitmap *bm = (GdkBitmap *) NULL; - if (mask) bm = mask->GetBitmap(); - GdkPixmap *pm = m_goIcon.GetPixmap(); - - gtk_drag_set_icon_pixmap( context, - gtk_widget_get_colormap( m_widget ), - pm, - bm, - 0, - 0 ); - - while (m_waiting) wxYield(); + 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; + + int allowed_actions = GDK_ACTION_COPY; + if ( flags & wxDrag_AllowMove ) + allowed_actions |= GDK_ACTION_MOVE; - g_blockEventsOnDrag = FALSE; - - UnregisterWindow(); + // 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); return m_retValue; } -void wxDropSource::RegisterWindow() +void wxDropSource::GTKConnectDragSignals() { - if (!m_widget) return; - - 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 ); + 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::UnregisterWindow() +void wxDropSource::GTKDisconnectDragSignals() { - 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 ); + 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