c91108763b
git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@5115 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
109 lines
3.4 KiB
TeX
109 lines
3.4 KiB
TeX
\section{\class{wxValidator}}\label{wxvalidator}
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wxValidator is the base class for a family of validator classes that mediate
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between a class of control, and application data.
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A validator has three major roles:
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\begin{enumerate}\itemsep=0pt
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\item to transfer data from a C++ variable or own storage to and from a control;
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\item to validate data in a control, and show an appropriate error message;
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\item to filter events (such as keystrokes), thereby changing the behaviour of the
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associated control.
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\end{enumerate}
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Validators can be plugged into controls dynamically.
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To specify a default, `null' validator, use the symbol {\bf wxDefaultValidator}.
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For more information, please see \helpref{Validator overview}{validatoroverview}.
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\pythonnote{If you wish to create a validator class in wxPython you should
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derive the class from {\tt wxPyValidator} in order to get Python-aware
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capabilities for the various virtual methods.}
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\wxheading{Derived from}
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\helpref{wxEvtHandler}{wxevthandler}\\
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\helpref{wxObject}{wxobject}
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\wxheading{Include files}
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<wx/validate.h>
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\wxheading{See also}
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\helpref{Validator overview}{validatoroverview},
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\helpref{wxTextValidator}{wxtextvalidator},
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\helpref{wxGenericValidator}{wxgenericvalidator},
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\latexignore{\rtfignore{\wxheading{Members}}}
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\membersection{wxValidator::wxValidator}\label{wxvalidatorconstr}
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\func{}{wxValidator}{\void}
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Constructor.
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\membersection{wxValidator::\destruct{wxValidator}}
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\func{}{\destruct{wxValidator}}{\void}
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Destructor.
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\membersection{wxValidator::Clone}\label{wxvalidatorclone}
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\constfunc{virtual wxValidator*}{Clone}{\void}
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All validator classes must implement the {\bf Clone} function, which returns
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an identical copy of itself. This is because validators are passed to control
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constructors as references which must be copied. Unlike objects such as pens
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and brushes, it does not make sense to have a reference counting scheme
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to do this cloning, because all validators should have separate
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data.
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This base function returns NULL.
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\membersection{wxValidator::GetWindow}\label{wxvalidatorgetwindow}
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\constfunc{wxWindow*}{GetWindow}{\void}
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Returns the window associated with the validator.
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\membersection{wxValidator::SetBellOnError}{wxvalidatorsetbellonerror}
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\func{void}{SetBellOnError}{\param{bool}{ doIt = TRUE}}
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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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\membersection{wxValidator::SetWindow}\label{wxvalidatorsetwindow}
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\func{void}{SetWindow}{\param{wxWindow*}{ window}}
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Associates a window with the validator.
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\membersection{wxValidator::TransferFromWindow}\label{wxvalidatortransferfromwindow}
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\func{virtual bool}{TransferToWindow}{}
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This overridable function is called when the value in the window must be
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transferred to the validator. Return FALSE if there is a problem.
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\membersection{wxValidator::TransferToWindow}\label{wxvalidatortransfertowindow}
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\func{virtual bool}{TransferToWindow}{}
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This overridable function is called when the value associated with the validator must be
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transferred to the window. Return FALSE if there is a problem.
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\membersection{wxValidator::Validate}\label{wxvalidatorvalidate}
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\func{virtual bool}{Validate}{\param{wxWindow*}{ parent}}
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This overridable function is called when the value in the associated window must be validated.
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Return FALSE if the value in the window is not valid; you may pop up an error dialog.
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