180d62d808
git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@58570 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
130 lines
3.8 KiB
Objective-C
130 lines
3.8 KiB
Objective-C
/////////////////////////////////////////////////////////////////////////////
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// Name: validate.h
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// Purpose: interface of wxValidator
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// Author: wxWidgets team
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// RCS-ID: $Id$
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// Licence: wxWindows license
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/////////////////////////////////////////////////////////////////////////////
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/**
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@class wxValidator
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wxValidator is the base class for a family of validator classes that
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mediate between a class of control, and application data.
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A validator has three major roles:
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-# To transfer data from a C++ variable or own storage to and from a
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control.
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-# To validate data in a control, and show an appropriate error message.
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-# To filter events (such as keystrokes), thereby changing the behaviour
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of the associated control.
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Validators can be plugged into controls dynamically.
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To specify a default, "null" validator, use ::wxDefaultValidator.
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For more information, please see @ref overview_validator.
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@beginWxPythonOnly
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If you wish to create a validator class in wxPython you should derive the
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class from @c wxPyValidator in order to get Python-aware capabilities for
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the various virtual methods.
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@endWxPythonOnly
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@library{wxcore}
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@category{validator}
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@stdobjects
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::wxDefaultValidator
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@see @ref overview_validator, wxTextValidator, wxGenericValidator
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*/
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class wxValidator : public wxEvtHandler
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{
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public:
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/**
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Constructor.
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*/
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wxValidator();
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/**
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Destructor.
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*/
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virtual ~wxValidator();
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/**
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All validator classes must implement the Clone() function, which
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returns an identical copy of itself.
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This is because validators are passed to control constructors as
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references which must be copied. Unlike objects such as pens and
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brushes, it does not make sense to have a reference counting scheme to
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do this cloning because all validators should have separate data.
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@return This base function returns @NULL.
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*/
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virtual wxObject* Clone() const;
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/**
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Returns the window associated with the validator.
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*/
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wxWindow* GetWindow() const;
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/**
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This functions switches on or turns off the error sound produced by the
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validators if an invalid key is pressed.
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*/
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static void SetBellOnError(bool doIt = true);
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/**
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Associates a window with the validator.
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This function is automatically called by wxWidgets when creating a wxWindow-derived
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class instance which takes a wxValidator reference.
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E.g.
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@code
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new wxTextCtrl(this, wxID_ANY, wxEmptyString, wxDefaultPosition, wxDefaultSize, 0,
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wxTextValidator(wxFILTER_ALPHA, &g_data.m_string));
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@endcode
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will automatically link the wxTextValidator instance with the wxTextCtrl
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instance.
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*/
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void SetWindow(wxWindow* window);
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/**
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This overridable function is called when the value in the window must
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be transferred to the validator.
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@return @false if there is a problem.
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*/
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virtual bool TransferFromWindow();
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/**
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This overridable function is called when the value associated with the
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validator must be transferred to the window.
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@return @false if there is a problem.
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*/
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virtual bool TransferToWindow();
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/**
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This overridable function is called when the value in the associated
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window must be validated.
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@param parent
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The parent of the window associated with the validator.
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@return @false if the value in the window is not valid; you may pop up
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an error dialog.
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*/
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virtual bool Validate(wxWindow* parent);
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};
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/**
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An empty, "null" wxValidator instance.
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*/
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wxValidator wxDefaultValidator;
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