wxDataObjectSimple

This is the simplest possible implementation of the wxDataObject class. The data object of (a class derived from) this class only supports one format, so the number of virtual functions to be implemented is reduced.

Notice that this is still an abstract base class and cannot be used but should be derived from.

wxPython での注意点: If you wish to create a derived wxDataObjectSimple class in wxPython you should derive the class from wxPyDataObjectSimple in order to get Python-aware capabilities for the various virtual methods.

wxPerl での注意点: In wxPerl, you need to derive your data object class from Wx::PlDataObjectSimple.

Virtual functions to override

The objects supporting rendering the data must override GetDataSize and GetDataHere while the objects which may be set must override SetData. Of course, the objects supporting both operations must override all three methods.

Derived from

wxDataObject

Include files

<wx/dataobj.h>

See also

Clipboard and drag and drop overview, DnD sample, wxFileDataObject, wxTextDataObject, wxBitmapDataObject



wxDataObjectSimple::wxDataObjectSimple



wxDataObjectSimple(const wxDataFormat& format = wxFormatInvalid)

Constructor accepts the supported format (none by default) which may also be set later with SetFormat.



wxDataObjectSimple::GetFormat

const wxDataFormat& GetFormat(void) const

Returns the (one and only one) format supported by this object. It is supposed that the format is supported in both directions.



wxDataObjectSimple::SetFormat



void SetFormat(const wxDataFormat& format)

Sets the supported format.



wxDataObjectSimple::GetDataSize

virtual size_t GetDataSize(void) const

Gets the size of our data. Must be implemented in the derived class if the object supports rendering its data.



wxDataObjectSimple::GetDataHere

virtual bool GetDataHere(void *buf) const

Copy the data to the buffer, return true on success. Must be implemented in the derived class if the object supports rendering its data.

wxPython での注意点: When implementing this method in wxPython, no additional parameters are required and the data should be returned from the method as a string.



wxDataObjectSimple::SetData



virtual bool SetData(size_t len, const void *buf)

Copy the data from the buffer, return true on success. Must be implemented in the derived class if the object supports setting its data.

wxPython での注意点: When implementing this method in wxPython, the data comes as a single string parameter rather than the two shown here.

ymasuda 平成17年11月19日