wx.DataFormat¶

A wx.DataFormat is an encapsulation of a platform-specific format handle which is used by the system for the clipboard and drag and drop operations.

The applications are usually only interested in, for example, pasting data from the clipboard only if the data is in a format the program understands and a data format is something which uniquely identifies this format.

On the system level, a data format is usually just a number ( CLIPFORMAT under Windows or Atom under X11, for example) and the standard formats are, indeed, just numbers which can be implicitly converted to wx.DataFormat. The standard formats are:

 wx.DF_INVALID An invalid format - used as default argument for functions taking a wx.DataFormat argument sometimes. wx.DF_TEXT Text format (String ). wx.DF_BITMAP A bitmap ( wx.Bitmap). wx.DF_METAFILE A metafile ( wx.Metafile, Windows only). wx.DF_FILENAME A list of filenames. wx.DF_HTML An HTML string. This is currently only valid on Mac and MSW.

As mentioned above, these standard formats may be passed to any function taking wx.DataFormat argument because wx.DataFormat has an implicit conversion from them (or, to be precise from the type DataFormat::NativeFormat which is the type used by the underlying platform for data formats).

Aside the standard formats, the application may also use custom formats which are identified by their names (strings) and not numeric identifiers. Although internally custom format must be created (or registered) first, you shouldn’t care about it because it is done automatically the first time the wx.DataFormat object corresponding to a given format name is created. The only implication of this is that you should avoid having global wx.DataFormat objects with non-default constructor because their constructors are executed before the program has time to perform all necessary initialisations and so an attempt to do clipboard format registration at this time will usually lead to a crash!

Drag and Drop Overview, Drag & Drop Sample, wx.DataObject

Class Hierarchy¶

Inheritance diagram for class DataFormat:

Methods Summary¶

 __init__ Constructs a data format object for one of the standard data formats or an empty data object (use SetType or SetId later in this case). GetId Returns the name of a custom format (this function will fail for a standard format). GetType Returns the platform-specific number identifying the format. SetId Sets the format to be the custom format identified by the given name. SetType Sets the format to the given value, which should be one of DF_XXX constants. __ne__ Returns True if the formats are different. __eq__ Returns True if the formats are equal.

Class API¶

class wx.DataFormat(object)

Possible constructors:

DataFormat(format=DF_INVALID)

DataFormat(format)


A DataFormat is an encapsulation of a platform-specific format handle which is used by the system for the clipboard and drag and drop operations.

Methods¶

__init__(self, *args, **kw)

__init__ (self, format=DF_INVALID)

Constructs a data format object for one of the standard data formats or an empty data object (use SetType or SetId later in this case).

__init__ (self, format)

Constructs a data format object for a custom format identified by its name format.

GetId(self)

Returns the name of a custom format (this function will fail for a standard format).

Return type

string

GetType(self)

Returns the platform-specific number identifying the format.

Return type

wx.DataFormatId

SetId(self, format)

Sets the format to be the custom format identified by the given name.

Parameters

format (string) –

SetType(self, type)

Sets the format to the given value, which should be one of DF_XXX constants.

Parameters

type (DataFormatId) –

__ne__(self, *args, **kw)

Returns True if the formats are different.

__ne__ (self)

Parameters

format (wx.DataFormat) –

__ne__ (self)

Parameters

format (DataFormatId) –

__eq__(self, *args, **kw)

Returns True if the formats are equal.

__eq__ (self)

Parameters

format (wx.DataFormat) –

__eq__ (self)

Parameters

format (DataFormatId) –

Properties¶

Id

Type