wxErlang

Reference Manual

Version 2.1

Table of Contents

wxTextDataObject

Module

wxTextDataObject

Module Summary

Functions for wxTextDataObject class

Description

wxTextDataObject is a specialization of wxDataObjectSimple (not implemented in wx) for text data. It can be used without change to paste data into the wxClipboard or a wxDropSource (not implemented in wx). A user may wish to derive a new class from this class for providing text on-demand in order to minimize memory consumption when offering data in several formats, such as plain text and RTF because by default the text is stored in a string in this class, but it might as well be generated when requested. For this, getTextLength/1 and getText/1 will have to be overridden.

Note that if you already have the text inside a string, you will not achieve any efficiency gain by overriding these functions because copying wxStrings is already a very efficient operation (data is not actually copied because wxStrings are reference counted).

See: Overview dnd, wxDataObject, wxDataObjectSimple (not implemented in wx), wxFileDataObject, wxBitmapDataObject

This class is derived (and can use functions) from: wxDataObject

wxWidgets docs: wxTextDataObject

Data Types

wxTextDataObject() = wx:wx_object()

Exports

new() -> wxTextDataObject()
new(Options :: [Option]) -> wxTextDataObject()

Types

Option = {text, unicode:chardata()}

Constructor, may be used to initialise the text (otherwise setText/2 should be used later).

getTextLength(This) -> integer()

Types

This = wxTextDataObject()

Returns the data size.

By default, returns the size of the text data set in the constructor or using setText/2. This can be overridden to provide text size data on-demand. It is recommended to return the text length plus 1 for a trailing zero, but this is not strictly required.

getText(This) -> unicode:charlist()

Types

This = wxTextDataObject()

Returns the text 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 text form from the wxClipboard.

setText(This, StrText) -> ok

Types

This = wxTextDataObject()
StrText = unicode:chardata()

Sets the text associated with the data object.

This method is called when the data object receives the data and, by default, copies the text into the member variable. If you want to process the text on the fly you may wish to override this function.

destroy(This :: wxTextDataObject()) -> ok

Destroys the object.

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