wxBitmapDataObject is a specialization of wxDataObject for bitmap data. It can be used without change to paste data into the wxClipboard or a wxDropSource. A user may wish to derive a new class from this class for providing a bitmap on-demand in order to minimize memory consumption when offering data in several formats, such as a bitmap and GIF.
wxPython note: If you wish to create a derived wxBitmapDataObject class in wxPython you should derive the class from wxPyBitmapDataObject in order to get Python-aware capabilities for the various virtual methods.
Virtual functions to override
This class may be used as is, but GetBitmap may be overridden to increase efficiency.
継承元
wxDataObjectSimple
wxDataObject
インクルードファイル
<wx/dataobj.h>
参照
Clipboard and drag and drop overview, wxDataObject, wxDataObjectSimple, wxFileDataObject, wxTextDataObject, wxDataObject
wxBitmapDataObject(const wxBitmap& bitmap = wxNullBitmap)
Constructor, optionally passing a bitmap (otherwise use SetBitmap later).
wxBitmapDataObject::GetBitmap
wxBitmapDataObject::SetBitmap
virtual wxBitmap GetBitmap() const
Returns the bitmap associated with the data object. You may wish to override this method when offering data on-demand, but this is not required by wxWidgets' internals. Use this method to get data in bitmap form from the wxClipboard.
virtual void SetBitmap(const wxBitmap& bitmap)
Sets the bitmap associated with the data object. This method is called when the data object receives data. Usually there will be no reason to override this function.