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Display system-provided drag images during drag-and-drop in wxMSW.

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This is especially useful when dragging files from Explorer as it provides
big, informative drag images for them that can be easily displayed using
Windows shell support for them.

See #14697.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@72668 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
This commit is contained in:
Vadim Zeitlin
2012-10-13 22:53:46 +00:00
parent 0ec1064b79
commit 403750325d
4 changed files with 384 additions and 40 deletions
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19
include/wx/msw/ole/droptgt.h
View File

@@ -19,6 +19,7 @@
// ----------------------------------------------------------------------------
class wxIDropTarget;
struct IDropTargetHelper;
struct IDataObject;
// ----------------------------------------------------------------------------
@@ -60,12 +61,26 @@ public:
// GetData() when it's called from inside OnData()
void MSWSetDataSource(IDataObject *pIDataSource);
// These functions take care of all things necessary to support native drag
// images.
//
// {Init,End}DragImageSupport() are called during Register/Revoke,
// UpdateDragImageOnXXX() functions are called on the corresponding drop
// target events.
void MSWInitDragImageSupport();
void MSWEndDragImageSupport();
void MSWUpdateDragImageOnData(wxCoord x, wxCoord y, wxDragResult res);
void MSWUpdateDragImageOnDragOver(wxCoord x, wxCoord y, wxDragResult res);
void MSWUpdateDragImageOnEnter(wxCoord x, wxCoord y, wxDragResult res);
void MSWUpdateDragImageOnLeave();
private:
// helper used by IsAcceptedData() and GetData()
wxDataFormat MSWGetSupportedFormat(IDataObject *pIDataSource) const;
wxIDropTarget *m_pIDropTarget; // the pointer to our COM interface
IDataObject *m_pIDataSource; // the pointer to the source data object
wxIDropTarget *m_pIDropTarget; // the pointer to our COM interface
IDataObject *m_pIDataSource; // the pointer to the source data object
IDropTargetHelper *m_dropTargetHelper; // the pointer to the drop target helper
wxDECLARE_NO_COPY_CLASS(wxDropTarget);
};