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Allow more than one timer with the same ID. See #11699.

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git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/branches/WX_2_8_BRANCH@63420 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
This commit is contained in:
Robin Dunn
2010-02-08 19:38:46 +00:00
parent b42afac3a0
commit d479459b39
1 changed files with 23 additions and 35 deletions
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58
src/msw/timer.cpp
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@@ -52,6 +52,24 @@ static wxTimerMap& TimerMap()
return s_timerMap;
}
// This gets a unique, non-zero timer ID and creates an entry in the TimerMap
UINT_PTR GetNewTimerId(wxTimer *t)
{
static UINT_PTR lastTimerId = 0;
while (lastTimerId == 0 ||
TimerMap().find(lastTimerId) != TimerMap().end())
{
lastTimerId = lastTimerId + 1;
}
TimerMap()[lastTimerId] = t;
return lastTimerId;
}
// ----------------------------------------------------------------------------
// private functions
// ----------------------------------------------------------------------------
@@ -110,12 +128,13 @@ IMPLEMENT_ABSTRACT_CLASS(wxTimer, wxEvtHandler)
void wxTimer::Init()
{
m_id = 0;
m_id = GetNewTimerId(this);
}
wxTimer::~wxTimer()
{
wxTimer::Stop();
TimerMap().erase(m_id);
}
bool wxTimer::Start(int milliseconds, bool oneShot)
@@ -123,50 +142,23 @@ bool wxTimer::Start(int milliseconds, bool oneShot)
if ( !wxTimerBase::Start(milliseconds, oneShot) )
return false;
// SetTimer() doesn't accept 0 timer id so use something else if the timer
// id at wx level is 0: as -1 (wxID_ANY) can't be used, we can safely
// replace 0 with it at MSW level
UINT idTimer = GetId();
if ( !idTimer )
idTimer = (UINT)-1;
// SetTimer() normally returns just idTimer but this might change in the
// future so use its return value to be safe
m_id = ::SetTimer
UINT_PTR ret = ::SetTimer
(
wxTimerHiddenWindowModule::GetHWND(), // window for WM_TIMER
idTimer, // timer ID to create
m_id, // timer ID to create
(UINT)m_milli, // delay
NULL // timer proc (unused)
);
if ( !m_id )
if ( !ret )
{
wxLogSysError(_("Couldn't create a timer"));
return false;
}
// check that SetTimer() didn't reuse an existing id: according to the MSDN
// this can happen and this would be catastrophic to us as we rely on ids
// uniquely identifying the timers because we use them as keys in the hash
//
// notice that this also happens if the same id is reused for multiple
// timers: this used to work in previous versions but was never supported
// and absolutely shouldn't be done, use wxID_ANY to assign an id to the
// timer automatically or ensure that all your timers have unique ids
if ( TimerMap().find(m_id) != TimerMap().end() )
{
wxLogError(_("Timer creation failed."));
::KillTimer(wxTimerHiddenWindowModule::GetHWND(), m_id);
m_id = 0;
return false;
}
TimerMap()[m_id] = this;
return true;
}
@@ -175,11 +167,7 @@ void wxTimer::Stop()
if ( m_id )
{
::KillTimer(wxTimerHiddenWindowModule::GetHWND(), m_id);
TimerMap().erase(m_id);
}
m_id = 0;
}
// ----------------------------------------------------------------------------