0dc1654ab6
We ended up not needing the underlying QMimeData-based implementation, as the classes sitting on top of it bypassed it anyway. It now treats the hierarchy as a pure data storage mechanism, generating the QMimeData when drag-drop is initiated.
140 lines
3.6 KiB
C++
140 lines
3.6 KiB
C++
/////////////////////////////////////////////////////////////////////////////
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// Name: src/qt/dnd.cpp
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// Author: Peter Most
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// Copyright: (c) Peter Most
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// Licence: wxWindows licence
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/////////////////////////////////////////////////////////////////////////////
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// For compilers that support precompilation, includes "wx.h".
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#include "wx/wxprec.h"
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#if wxUSE_DRAG_AND_DROP
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#include "wx/dnd.h"
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#include "wx/scopedarray.h"
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#include "wx/qt/private/converter.h"
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#include <QDrag>
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#include <QWidget>
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#include <QMimeData>
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namespace
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{
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wxDragResult DropActionToDragResult(Qt::DropAction action)
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{
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switch ( action )
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{
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case Qt::IgnoreAction:
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return wxDragCancel;
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case Qt::CopyAction:
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return wxDragCopy;
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case Qt::MoveAction:
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return wxDragMove;
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case Qt::LinkAction:
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return wxDragLink;
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default:
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return wxDragNone;
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}
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}
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void AddDataFormat(wxDataObject* dataObject, QMimeData* mimeData, const wxDataFormat& format)
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{
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const size_t data_size = dataObject->GetDataSize(format);
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QByteArray data(static_cast<int>(data_size), Qt::Initialization());
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dataObject->GetDataHere(format, data.data());
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mimeData->setData(wxQtConvertString(format.GetMimeType()), data);
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}
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QMimeData* CreateMimeData(wxDataObject* dataObject)
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{
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QMimeData* mimeData = new QMimeData();
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const size_t count = dataObject->GetFormatCount();
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wxScopedArray<wxDataFormat> array(dataObject->GetFormatCount());
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dataObject->GetAllFormats(array.get());
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for ( size_t i = 0; i < count; i++ )
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{
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AddDataFormat(dataObject, mimeData, array[i]);
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}
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return mimeData;
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}
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}
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wxDropTarget::wxDropTarget(wxDataObject *WXUNUSED(dataObject))
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{
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}
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bool wxDropTarget::OnDrop(wxCoord WXUNUSED(x), wxCoord WXUNUSED(y))
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{
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return false;
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}
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wxDragResult wxDropTarget::OnData(wxCoord WXUNUSED(x), wxCoord WXUNUSED(y), wxDragResult WXUNUSED(def))
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{
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return wxDragResult();
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}
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bool wxDropTarget::GetData()
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{
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return false;
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}
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wxDataFormat wxDropTarget::GetMatchingPair()
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{
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wxFAIL_MSG("wxDropTarget::GetMatchingPair() not implemented in src/qt/dnd.cpp");
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return wxDF_INVALID;
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}
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//##############################################################################
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wxDropSource::wxDropSource( wxWindow *win,
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const wxIcon &WXUNUSED(copy),
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const wxIcon &WXUNUSED(move),
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const wxIcon &WXUNUSED(none))
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: m_parentWindow(win)
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{
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}
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wxDropSource::wxDropSource( wxDataObject& data,
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wxWindow *win,
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const wxIcon &WXUNUSED(copy),
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const wxIcon &WXUNUSED(move),
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const wxIcon &WXUNUSED(none))
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: m_parentWindow(win)
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{
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SetData(data);
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}
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wxDragResult wxDropSource::DoDragDrop(int flags /*=wxDrag_CopyOnly*/)
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{
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wxCHECK_MSG(m_data != NULL, wxDragNone, wxT("No data in wxDropSource!"));
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wxCHECK_MSG(m_parentWindow != NULL, wxDragNone, wxT("NULL parent window in wxDropSource!"));
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QDrag drag(m_parentWindow->GetHandle());
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drag.setMimeData(CreateMimeData(m_data));
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Qt::DropActions actions = Qt::CopyAction | Qt::MoveAction;
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Qt::DropAction defaultAction = Qt::CopyAction;
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switch ( flags )
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{
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case wxDrag_CopyOnly:
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actions = Qt::CopyAction;
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break;
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case wxDrag_DefaultMove:
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defaultAction = Qt::MoveAction;
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break;
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default:
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break;
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}
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return DropActionToDragResult(drag.exec(actions, defaultAction));
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}
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#endif // wxUSE_DRAG_AND_DROP
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