wxWidgets: wxObject Class Reference (original) (raw)

#include <wx/object.h>

Inherited by wxAcceleratorTable, wxAccessible, wxAnimation, wxArchiveClassFactory, wxArchiveEntry, wxArtProvider, wxAutomationObject, wxBitmapHandler, wxClient, wxClipboard, wxColour, wxColourData, wxColourPropertyValue, wxCommand, wxCommandProcessor, wxConfigBase, wxConnection, wxConnectionBase, wxContextHelp, wxDataViewIconText, wxDataViewRenderer, wxDC, wxDDEClient, wxDocTemplate, wxDragImage, wxEncodingConverter, wxEvent, wxEvtHandler, wxFileHistory, wxFileSystem, wxFileSystemHandler, wxFilterClassFactory, wxFindReplaceData, wxFontData, wxFSFile, wxGDIObject, wxGLContext, wxGraphicsObject, wxGraphicsRenderer, wxGridTableBase, wxHashTable, wxHelpControllerBase, wxHtmlCell, wxHtmlDCRenderer, wxHtmlEasyPrinting, wxHtmlFilter, wxHtmlHelpData, wxHtmlLinkInfo, wxHtmlTagHandler, wxImage, wxImageHandler, wxImageList, wxIndividualLayoutConstraint, wxJoystick, wxLayoutAlgorithm, wxLayoutConstraints, wxListItem, wxMask, wxMenuItem, wxMetafile, wxModule, wxPageSetupDialog, wxPageSetupDialogData, wxPGCell, wxPGEditor, wxPGEditorDialogAdapter, wxPGProperty, wxPrintData, wxPrintDialog, wxPrintDialogData, wxPrinter, wxPrintout, wxPrintPreview, wxQuantize, wxRegionIterator, wxRichTextAction, wxRichTextDrawingContext, wxRichTextDrawingHandler, wxRichTextFieldType, wxRichTextFileHandler, wxRichTextFontTable, wxRichTextFormattingDialogFactory, wxRichTextHeaderFooterData, wxRichTextImageBlock, wxRichTextObject, wxRichTextPrinting, wxRichTextProperties, wxRichTextRenderer, wxRichTextStyleDefinition, wxRichTextStyleSheet, wxSizer, wxSizerItem, wxSockAddress, wxSocketBase, wxSound, wxStringTokenizer, wxSystemOptions, wxTCPClient, wxTCPConnection, wxTCPServer, wxToolBarToolBase, wxToolTip, wxURI, wxVariant, wxWebViewFactory, wxXmlDocument, wxXmlResource, and wxXmlResourceHandler.

This is the root class of many of the wxWidgets classes.

It declares a virtual destructor which ensures that destructors get called for all derived class objects where necessary.

wxObject is the hub of a dynamic object creation scheme, enabling a program to create instances of a class only knowing its string class name, and to query the class hierarchy.

The class contains optional debugging versions of new and delete, which can help trace memory allocation and deallocation problems.

wxObject can be used to implement reference counted objects, such as wxPen, wxBitmap and others (see this list). See wxRefCounter and Reference Counting for more info about reference counting.

See also

wxClassInfo, Debugging, Reference Counting, wxObjectDataRef, wxObjectDataPtr

Default ctor; initializes to NULL the internal reference data.

Copy ctor.

Sets the internal wxObject::m_refData pointer to point to the same instance of the wxObjectRefData-derived class pointed by other and increments the refcount of wxObject::m_refData.

Destructor.

Performs dereferencing, for those objects that use reference counting.

Ensure that this object's data is not shared with any other object.

If we have no data, it is created using CreateRefData(); if we have shared data (i.e. data with a reference count greater than 1), it is copied using CloneRefData(); otherwise nothing is done (the data is already present and is not shared by other object instances).

If you use this function you should make sure that you override the CreateRefData() and CloneRefData() functions in your class otherwise an assertion will fail at runtime.

Creates a new instance of the wxObjectRefData-derived class specific to this object and initializes it copying data.

This is usually implemented as a one-line call:

{

return new MyObjectRefData(*(MyObjectRefData *)data);

}

Creates a new instance of the wxObjectRefData-derived class specific to this object and returns it.

This is usually implemented as a one-line call:

{

return new MyObjectRefData;

}

This virtual function is redefined for every class that requires run-time type information, when using the wxDECLARE_CLASS macro (or similar).

Determines whether this class is a subclass of (or the same class as) the given class.

Example:

Parameters

Returns

true if the class represented by info is the same class as this one or is derived from it.

Returns true if this object has the same data pointer as obj.

Notice that true is returned if the data pointers are NULL in both objects.

This function only does a shallow comparison, i.e. it doesn't compare the objects pointed to by the data pointers of these objects.

See also

Reference Counting

The delete operator is defined for debugging versions of the library only, when the identifier **WXDEBUG** is defined.

It takes over memory deallocation, allowing wxDebugContext operations.

The new operator is defined for debugging versions of the library only, when the identifier **WXDEBUG** is defined.

It takes over memory allocation, allowing wxDebugContext operations.