#include "wx/utils.h"
-class WXDLLEXPORT wxEventLoop;
-
// ----------------------------------------------------------------------------
-// wxEventLoop: a GUI event loop
+// wxEventLoopBase: interface for wxEventLoop
// ----------------------------------------------------------------------------
-class WXDLLEXPORT wxEventLoopBase
+class WXDLLIMPEXP_BASE wxEventLoopBase
{
public:
// trivial, but needed (because of wxEventLoopBase) ctor
// dtor
virtual ~wxEventLoopBase() { }
+ // use this to check whether the event loop was successfully created before
+ // using it
+ virtual bool IsOk() const { return true; }
+
+
// start the event loop, return the exit code when it is finished
virtual int Run() = 0;
// dispatch a single event, return false if we should exit from the loop
virtual bool Dispatch() = 0;
+ // same as Dispatch() but doesn't wait for longer than the specified (in
+ // ms) timeout, return true if an event was processed, false if we should
+ // exit the loop or -1 if timeout expired
+ virtual int DispatchTimeout(unsigned long timeout) = 0;
+
+
// return currently active (running) event loop, may be NULL
- static wxEventLoop *GetActive() { return ms_activeLoop; }
+ static wxEventLoopBase *GetActive() { return ms_activeLoop; }
// set currently active (running) event loop
- static void SetActive(wxEventLoop* loop) { ms_activeLoop = loop; }
+ static void SetActive(wxEventLoopBase* loop) { ms_activeLoop = loop; }
// is this event loop running now?
//
// spawned a nested (e.g. modal) event loop, this would return false
bool IsRunning() const;
+ // implement this to wake up the loop: usually done by posting a dummy event
+ // to it (can be called from non main thread)
+ virtual void WakeUp() = 0;
+
protected:
// this function should be called before the event loop terminates, whether
// this happens normally (because of Exit() call) or abnormally (because of
// the pointer to currently active loop
- static wxEventLoop *ms_activeLoop;
+ static wxEventLoopBase *ms_activeLoop;
DECLARE_NO_COPY_CLASS(wxEventLoopBase)
};
+#if defined(__WXMSW__) || defined(__WXMAC__) || defined(__WXDFB__) || defined(__UNIX__)
+
+// this class can be used to implement a standard event loop logic using
+// Pending() and Dispatch()
+//
+// it also handles idle processing automatically
+class WXDLLIMPEXP_BASE wxEventLoopManual : public wxEventLoopBase
+{
+public:
+ wxEventLoopManual();
+
+ // enters a loop calling OnNextIteration(), Pending() and Dispatch() and
+ // terminating when Exit() is called
+ virtual int Run();
+
+ // sets the "should exit" flag and wakes up the loop so that it terminates
+ // soon
+ virtual void Exit(int rc = 0);
+
+protected:
+ // may be overridden to perform some action at the start of each new event
+ // loop iteration
+ virtual void OnNextIteration() { }
+
+
+ // the loop exit code
+ int m_exitcode;
+
+ // should we exit the loop?
+ bool m_shouldExit;
+};
+
+#endif // platforms using "manual" loop
+
// we're moving away from old m_impl wxEventLoop model as otherwise the user
// code doesn't have access to platform-specific wxEventLoop methods and this
// can sometimes be very useful (e.g. under MSW this is necessary for
#elif defined(__WXMSW__)
#include "wx/msw/evtloop.h"
#elif defined(__WXMAC__)
- #include "wx/mac/evtloop.h"
+ #include "wx/osx/evtloop.h"
+#elif defined(__WXCOCOA__)
+ #include "wx/cocoa/evtloop.h"
+#elif defined(__WXDFB__)
+ #include "wx/dfb/evtloop.h"
+#elif defined(__WXGTK20__)
+ #include "wx/gtk/evtloop.h"
#else // other platform
-class WXDLLEXPORT wxEventLoopImpl;
+#include "wx/stopwatch.h" // for wxMilliClock_t
+
+class WXDLLIMPEXP_FWD_CORE wxEventLoopImpl;
-class WXDLLEXPORT wxEventLoop : public wxEventLoopBase
+class WXDLLIMPEXP_CORE wxGUIEventLoop : public wxEventLoopBase
{
public:
- wxEventLoop() { m_impl = NULL; }
- virtual ~wxEventLoop();
+ wxGUIEventLoop() { m_impl = NULL; }
+ virtual ~wxGUIEventLoop();
virtual int Run();
virtual void Exit(int rc = 0);
virtual bool Pending() const;
virtual bool Dispatch();
+ virtual int DispatchTimeout(unsigned long timeout)
+ {
+ // TODO: this is, of course, horribly inefficient and a proper wait with
+ // timeout should be implemented for all ports natively...
+ const wxMilliClock_t timeEnd = wxGetLocalTimeMillis() + timeout;
+ for ( ;; )
+ {
+ if ( Pending() )
+ return Dispatch();
+
+ if ( wxGetLocalTimeMillis() >= timeEnd )
+ return -1;
+ }
+ }
+ virtual void WakeUp() { }
protected:
// the pointer to the port specific implementation class
wxEventLoopImpl *m_impl;
- DECLARE_NO_COPY_CLASS(wxEventLoop)
+ DECLARE_NO_COPY_CLASS(wxGUIEventLoop)
};
#endif // platforms
+// also include the header defining wxConsoleEventLoop for Unix systems
+#if defined(__UNIX__)
+ #include "wx/unix/evtloop.h"
+#endif
+
+// we use a class rather than a typedef because wxEventLoop is forward-declared
+// in many places
+#if wxUSE_GUI
+ class wxEventLoop : public wxGUIEventLoop { };
+#else // !GUI
+ // we can't define wxEventLoop differently in GUI and base libraries so use
+ // a #define to still allow writing wxEventLoop in the user code
+ #if wxUSE_CONSOLE_EVENTLOOP && (defined(__WXMSW__) || defined(__UNIX__))
+ #define wxEventLoop wxConsoleEventLoop
+ #else // we still must define it somehow for the code below...
+ #define wxEventLoop wxEventLoopBase
+ #endif
+#endif
+
inline bool wxEventLoopBase::IsRunning() const { return GetActive() == this; }
+#if wxUSE_GUI
// ----------------------------------------------------------------------------
// wxModalEventLoop
// ----------------------------------------------------------------------------
// implement modality, we will surely need platform-specific implementations
// too, this generic implementation is here only temporarily to see how it
// works
-class WXDLLEXPORT wxModalEventLoop : public wxEventLoop
+class WXDLLIMPEXP_CORE wxModalEventLoop : public wxGUIEventLoop
{
public:
wxModalEventLoop(wxWindow *winModal)
delete m_windowDisabler;
m_windowDisabler = NULL;
- wxEventLoop::OnExit();
+ wxGUIEventLoop::OnExit();
}
private:
wxWindowDisabler *m_windowDisabler;
};
+#endif //wxUSE_GUI
+
// ----------------------------------------------------------------------------
// wxEventLoopActivator: helper class for wxEventLoop implementations
// ----------------------------------------------------------------------------
class wxEventLoopActivator
{
public:
- wxEventLoopActivator(wxEventLoop *evtLoop)
+ wxEventLoopActivator(wxEventLoopBase *evtLoop)
{
- m_evtLoopOld = wxEventLoop::GetActive();
- wxEventLoop::SetActive(evtLoop);
+ m_evtLoopOld = wxEventLoopBase::GetActive();
+ wxEventLoopBase::SetActive(evtLoop);
}
~wxEventLoopActivator()
{
// restore the previously active event loop
- wxEventLoop::SetActive(m_evtLoopOld);
+ wxEventLoopBase::SetActive(m_evtLoopOld);
}
private:
- wxEventLoop *m_evtLoopOld;
+ wxEventLoopBase *m_evtLoopOld;
};
+#if wxUSE_CONSOLE_EVENTLOOP
+
+class wxEventLoopGuarantor
+{
+public:
+ wxEventLoopGuarantor()
+ {
+ m_evtLoopNew = NULL;
+ if (!wxEventLoop::GetActive())
+ {
+ m_evtLoopNew = new wxEventLoop;
+ wxEventLoop::SetActive(m_evtLoopNew);
+ }
+ }
+
+ ~wxEventLoopGuarantor()
+ {
+ if (m_evtLoopNew)
+ {
+ wxEventLoop::SetActive(NULL);
+ delete m_evtLoopNew;
+ }
+ }
+
+private:
+ wxEventLoop *m_evtLoopNew;
+};
+
+#endif // wxUSE_CONSOLE_EVENTLOOP
+
#endif // _WX_EVTLOOP_H_
projects / wxWidgets.git / blobdiff