97 lines
2.3 KiB
C++
97 lines
2.3 KiB
C++
///////////////////////////////////////////////////////////////////////////////
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// Name: tests/waitforpaint.h
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// Purpose: Helper WaitForPaint class
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// Author: Vadim Zeitlin
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// Created: 2019-10-17 (extracted from tests/window/setsize.cpp)
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// Copyright: (c) 2019 Vadim Zeitlin <vadim@wxwidgets.org>
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///////////////////////////////////////////////////////////////////////////////
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#ifndef _WX_TESTS_WAITFORPAINT_H_
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#define _WX_TESTS_WAITFORPAINT_H_
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#include "wx/stopwatch.h"
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#include "wx/window.h"
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// Class used to check if we received the (first) paint event: this is
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// currently used under GTK only, as MSW doesn't seem to need to wait for the
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// things to work, while under Mac nothing works anyhow.
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#ifdef __WXGTK__
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class WaitForPaint
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{
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public:
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explicit WaitForPaint(wxWindow* win)
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: m_win(*win),
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m_painted(false),
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m_handler(&m_painted)
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{
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m_win.Bind(wxEVT_PAINT, m_handler);
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}
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// This function waits up to the given number of milliseconds for the paint
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// event to come and returns true if we did get it or false otherwise.
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bool YieldUntilPainted(int timeoutInMS = 250) const
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{
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wxStopWatch sw;
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for ( ;; )
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{
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wxYield();
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if ( m_painted )
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return true;
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if ( sw.Time() > timeoutInMS )
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return false;
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}
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}
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~WaitForPaint()
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{
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m_win.Unbind(wxEVT_PAINT, m_handler);
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}
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private:
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wxWindow& m_win;
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bool m_painted;
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class PaintHandler
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{
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public:
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// Note that we have to use a pointer here, i.e. we can't just store
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// the flag inside the class itself because it's going to be cloned
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// inside wx and querying the flag of the original copy wouldtn' work.
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explicit PaintHandler(bool* painted)
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: m_painted(*painted)
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{
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}
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void operator()(wxPaintEvent& event)
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{
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event.Skip();
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m_painted = true;
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}
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private:
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bool& m_painted;
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} m_handler;
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};
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#else // !__WXGTK__
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class WaitForPaint
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{
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public:
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explicit WaitForPaint(wxWindow* WXUNUSED(win))
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{
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}
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bool YieldUntilPainted(int WXUNUSED(timeoutInMS) = 250) const
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{
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return true;
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}
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};
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#endif // __WXGTK__/!__WXGTK__
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#endif // _WX_TESTS_WAITFORPAINT_H_
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