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Drag'n'Drop works in a basic form

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git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@2150 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
This commit is contained in:
Robert Roebling
1999-04-13 20:22:32 +00:00
parent 62bd5cf059
commit 5af019af85
4 changed files with 236 additions and 166 deletions
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175
src/gtk/dnd.cpp
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@@ -232,15 +232,7 @@ static gboolean target_drag_drop( GtkWidget *widget,
bool ret = drop_target->OnDrop( x, y );
if (ret)
{
/* this should trigger an "drag_data_received" event */
gtk_drag_get_data( widget,
context,
GPOINTER_TO_INT (context->targets->data),
time );
}
else
if (!ret)
{
/* cancel the whole thing */
gtk_drag_finish( context,
@@ -279,47 +271,32 @@ static void target_drag_data_received( GtkWidget *WXUNUSED(widget),
// printf( "data received.\n" );
/* strangely, we get a "drag_data_received" event even when
we don't request them. this checks this. */
if (!drop_target->m_currentDataObject) return;
wxDataObject *data_object = drop_target->m_currentDataObject;
if ((data->length <= 0) || (data->format != 8))
{
/* negative data length and non 8-bit data format
qualifies for junk */
gtk_drag_finish (context, FALSE, FALSE, time);
return;
}
else
/* 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 ))
{
wxASSERT_MSG( data->target == data_object->GetFormat().GetAtom(), "DnD GetData target mismatch." );
if (data_object->GetFormat().GetType() == wxDF_TEXT)
{
wxTextDataObject *text_object = (wxTextDataObject*)data_object;
text_object->SetText( (const char*)data->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*)data->data, (size_t)data->length );
}
/* tell wxDropTarget that data transfer was successfull */
drop_target->m_dataRetrieveSuccess = TRUE;
/* tell GTK that data transfer was successfull */
gtk_drag_finish( context, TRUE, FALSE, time );
}
/* tell wxDropTarget that data has arrived (or not) */
drop_target->m_waiting = FALSE;
else
{
/* tell GTK that data transfer was not successfull */
gtk_drag_finish( context, FALSE, FALSE, time );
}
/* after this, invalidate the drop_target's drag data */
drop_target->SetDragData( (GtkSelectionData*) NULL );
}
//----------------------------------------------------------------------------
@@ -331,9 +308,8 @@ wxDropTarget::wxDropTarget()
m_firstMotion = TRUE;
m_dragContext = (GdkDragContext*) NULL;
m_dragWidget = (GtkWidget*) NULL;
m_dragData = (GtkSelectionData*) NULL;
m_dragTime = 0;
m_currentDataObject = (wxDataObject*) NULL;
m_dataRetrieveSuccess = FALSE;
}
wxDropTarget::~wxDropTarget()
@@ -358,6 +334,25 @@ bool wxDropTarget::OnDrop( int WXUNUSED(x), int WXUNUSED(y) )
return FALSE;
}
bool wxDropTarget::OnData( int WXUNUSED(x), int WXUNUSED(y) )
{
return FALSE;
}
bool wxDropTarget::RequestData( wxDataFormat format )
{
if (!m_dragContext) return FALSE;
if (!m_dragWidget) return FALSE;
/* 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;
@@ -377,32 +372,29 @@ bool wxDropTarget::IsSupported( wxDataFormat format )
return FALSE;
}
bool wxDropTarget::GetData( wxDataObject *data )
bool wxDropTarget::GetData( wxDataObject *data_object )
{
if (!m_dragContext) return FALSE;
if (!m_dragWidget) return FALSE;
if (!m_dragData) return FALSE;
m_currentDataObject = data;
m_dataRetrieveSuccess = 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 );
}
/* this should trigger an "drag_data_received" event */
gtk_drag_get_data( m_dragWidget,
m_dragContext,
data->GetFormat().GetAtom(),
m_dragTime );
/* wait for the "drag_data_received" event */
// printf( "pre wait.\n" );
m_waiting = TRUE;
while (m_waiting) wxYield();
// printf( "post wait.\n" );
m_currentDataObject = (wxDataObject*) NULL;
return m_dataRetrieveSuccess;
return TRUE;
}
void wxDropTarget::UnregisterWidget( GtkWidget *widget )
@@ -463,17 +455,27 @@ void wxDropTarget::RegisterWidget( GtkWidget *widget )
bool wxTextDropTarget::OnMove( int WXUNUSED(x), int WXUNUSED(y) )
{
return IsSupported( wxDF_TEXT ); // same as "STRING"
return IsSupported( wxDF_TEXT );
}
bool wxTextDropTarget::OnDrop( int x, int y )
bool wxTextDropTarget::OnDrop( int WXUNUSED(x), int WXUNUSED(y) )
{
if (!IsSupported( wxDF_TEXT )) return FALSE;
if (IsSupported( wxDF_TEXT ))
{
RequestData( wxDF_TEXT );
return TRUE;
}
return FALSE;
}
bool wxTextDropTarget::OnData( int x, int y )
{
wxTextDataObject data;
if (!GetData( &data )) return FALSE;
OnDropText( x, y, data.GetText() );
return TRUE;
}
@@ -496,7 +498,18 @@ bool wxPrivateDropTarget::OnMove( int WXUNUSED(x), int WXUNUSED(y) )
return IsSupported( m_id );
}
bool wxPrivateDropTarget::OnDrop( int x, int y )
bool wxPrivateDropTarget::OnDrop( int WXUNUSED(x), int WXUNUSED(y) )
{
if (!IsSupported( m_id ))
{
RequestData( m_id );
return FALSE;
}
return FALSE;
}
bool wxPrivateDropTarget::OnData( int x, int y )
{
if (!IsSupported( m_id )) return FALSE;
@@ -514,18 +527,24 @@ bool wxPrivateDropTarget::OnDrop( int x, int y )
bool wxFileDropTarget::OnMove( int WXUNUSED(x), int WXUNUSED(y) )
{
return IsSupported( wxDF_FILENAME ); // same as "file:ALL"
return IsSupported( wxDF_FILENAME );
}
bool wxFileDropTarget::OnDrop( int x, int y )
{
return IsSupported( wxDF_FILENAME ); // same as "file:ALL"
if (IsSupported( wxDF_FILENAME ))
{
RequestData( wxDF_FILENAME );
return TRUE;
}
return FALSE;
}
void wxFileDropTarget::OnData( int x, int y )
bool wxFileDropTarget::OnData( int x, int y )
{
wxFileDataObject data;
if (!GetData( &data )) return;
if (!GetData( &data )) return FALSE;
/* get number of substrings /root/mytext.txt/0/root/myothertext.txt/0/0 */
size_t number = 0;
@@ -535,7 +554,7 @@ void wxFileDropTarget::OnData( int x, int y )
for ( i = 0; i < size; i++)
if (text[i] == 0) number++;
if (number == 0) return;
if (number == 0) return FALSE;
char **files = new char*[number];
@@ -550,6 +569,8 @@ void wxFileDropTarget::OnData( int x, int y )
OnDropFiles( x, y, number, files );
free( files );
return TRUE;
}
//----------------------------------------------------------------------------
@@ -564,8 +585,8 @@ source_drag_data_get (GtkWidget *WXUNUSED(widget),
guint WXUNUSED(time),
wxDropSource *drop_source )
{
char *name = gdk_atom_name( selection_data->target );
if (name) printf( "Format requested: %s.\n", name );
// 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)
@@ -784,6 +805,8 @@ wxDragResult wxDropSource::DoDragDrop( bool WXUNUSED(bAllowMove) )
0,
0 );
gdk_flush();
while (m_waiting) wxYield();
}