758a81bc89
This can be useful if the window needs to be frozen only if some run-time condition holds true.
54 lines
1.5 KiB
C++
54 lines
1.5 KiB
C++
///////////////////////////////////////////////////////////////////////////////
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// Name: wx/wupdlock.h
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// Purpose: wxWindowUpdateLocker prevents window redrawing
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// Author: Vadim Zeitlin
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// Created: 2006-03-06
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// Copyright: (c) 2006 Vadim Zeitlin <vadim@wxwidgets.org>
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// Licence: wxWindows licence
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///////////////////////////////////////////////////////////////////////////////
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#ifndef _WX_WUPDLOCK_H_
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#define _WX_WUPDLOCK_H_
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#include "wx/window.h"
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// ----------------------------------------------------------------------------
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// wxWindowUpdateLocker prevents updates to the window during its lifetime
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// ----------------------------------------------------------------------------
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class wxWindowUpdateLocker
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{
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public:
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// Prefer using the ctor below if possible, this ctor is only useful if
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// Lock() must be called only conditionally.
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wxWindowUpdateLocker() : m_win(NULL) { }
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// create an object preventing updates of the given window (which must have
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// a lifetime at least as great as ours)
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explicit wxWindowUpdateLocker(wxWindow *win) : m_win(win) { win->Freeze(); }
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// May be called only for the object constructed using the default ctor.
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void Lock(wxWindow *win)
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{
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wxASSERT( !m_win );
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m_win = win;
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win->Freeze();
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}
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// dtor thaws the window to permit updates again
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~wxWindowUpdateLocker()
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{
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if ( m_win )
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m_win->Thaw();
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}
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private:
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wxWindow *m_win;
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wxDECLARE_NO_COPY_CLASS(wxWindowUpdateLocker);
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};
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#endif // _WX_WUPDLOCK_H_
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