#include "wx/dynarray.h"
#include "wx/time.h"
+#include "wx/progdlg.h"
+
+// uncomment this to get some debugging messages from the trace code
+//#define TRACE
+
class MyThread;
WX_DEFINE_ARRAY(wxThread *, wxArrayThread);
// operations
void WriteText(const wxString& text) { m_txtctrl->WriteText(text); }
+ // accessors for MyWorkerThread (called in its context!)
+ bool Cancelled();
+
// callbacks
void OnQuit(wxCommandEvent& event);
void OnAbout(wxCommandEvent& event);
void OnStopThread(wxCommandEvent& event);
void OnPauseThread(wxCommandEvent& event);
void OnResumeThread(wxCommandEvent& event);
-
+
void OnStartWorker(wxCommandEvent& event);
void OnWorkerEvent(wxCommandEvent& event);
+ void OnUpdateWorker(wxUpdateUIEvent& event);
void OnIdle(wxIdleEvent &event);
// remember the number of running threads and total number of threads
size_t m_nRunning, m_nCount;
+ // the progress dialog which we show while worker thread is running
+ wxProgressDialog *m_dlgProgress;
+
+ // was the worker thread cancelled by user?
+ bool m_cancelled;
+
+ // protects m_cancelled
+ wxCriticalSection m_critsectWork;
+
DECLARE_EVENT_TABLE()
};
wxMutexGuiEnter();
msg << text;
-
m_frame->WriteText(msg);
-
+
wxMutexGuiLeave();
}
text.Printf("Thread 0x%x started (priority = %d).\n",
GetId(), GetPriority());
WriteText(text);
+ // wxLogMessage(text); -- test wxLog thread safeness
for ( m_count = 0; m_count < 10; m_count++ )
{
text.Printf("Thread 0x%x finished.\n", GetId());
WriteText(text);
+ // wxLogMessage(text); -- test wxLog thread safeness
return NULL;
}
void *MyWorkerThread::Entry()
{
- for ( m_count = 0; m_count < 10; m_count++ )
+ for ( m_count = 0; !m_frame->Cancelled() && (m_count < 100); m_count++ )
{
// check if we were asked to exit
if ( TestDestroy() )
break;
-
+
wxString text;
text.Printf("[%u] Thread 0x%x here!!", m_count, GetId());
- // create any type of command event here
+ // create any type of command event here
wxCommandEvent event( wxEVT_COMMAND_MENU_SELECTED, WORKER_EVENT );
- event.SetInt( WORKER_EVENT );
+ event.SetInt( m_count );
event.SetString( text );
-
+
// send in a thread-safe way
wxPostEvent( m_frame, event );
-
+
// same as:
// m_frame->AddPendingEvent( event );
// wxSleep() can't be called from non-main thread!
- wxThread::Sleep(1000);
+ wxThread::Sleep(200);
}
+ wxCommandEvent event( wxEVT_COMMAND_MENU_SELECTED, WORKER_EVENT );
+ event.SetInt(-1); // that's all
+ wxPostEvent( m_frame, event );
+
return NULL;
}
EVT_MENU(TEST_STOP_THREAD, MyFrame::OnStopThread)
EVT_MENU(TEST_PAUSE_THREAD, MyFrame::OnPauseThread)
EVT_MENU(TEST_RESUME_THREAD, MyFrame::OnResumeThread)
-
+
+ EVT_UPDATE_UI(TEST_START_WORKER, MyFrame::OnUpdateWorker)
EVT_MENU(TEST_START_WORKER, MyFrame::OnStartWorker)
EVT_MENU(WORKER_EVENT, MyFrame::OnWorkerEvent)
// `Main program' equivalent, creating windows and returning main app frame
bool MyApp::OnInit()
{
+#ifdef TRACE
+ wxLog::AddTraceMask("thread");
+#endif
+
// Create the main frame window
MyFrame *frame = new MyFrame((wxFrame *)NULL, "wxWindows threads sample",
50, 50, 450, 340);
thread_menu->Append(TEST_RESUME_THREAD, "&Resume suspended thread\tCtrl-R");
thread_menu->AppendSeparator();
thread_menu->Append(TEST_START_WORKER, "Start &worker thread\tCtrl-W");
-
+
menu_bar->Append(thread_menu, "&Thread");
frame->SetMenuBar(menu_bar);
{
m_nRunning = m_nCount = 0;
+ m_dlgProgress = (wxProgressDialog *)NULL;
+
CreateStatusBar(2);
m_txtctrl = new wxTextCtrl(this, -1, "", wxPoint(0, 0), wxSize(0, 0),
void MyFrame::OnStopThread(wxCommandEvent& WXUNUSED(event) )
{
+ wxGetApp().m_critsect.Enter();
+
// stop the last thread
if ( wxGetApp().m_threads.IsEmpty() )
{
wxLogError("No thread to stop!");
+
+ wxGetApp().m_critsect.Leave();
}
else
{
- wxGetApp().m_critsect.Enter();
-
wxThread *thread = wxGetApp().m_threads.Last();
// it's important to leave critical section before calling Delete()
void MyFrame::OnClear(wxCommandEvent& WXUNUSED(event))
{
+#ifdef TRACE
+ // log a separator
+ wxLogTrace("-------- log window cleared --------");
+#endif
+
m_txtctrl->Clear();
}
+void MyFrame::OnUpdateWorker(wxUpdateUIEvent& event)
+{
+ event.Enable( m_dlgProgress == NULL );
+}
+
void MyFrame::OnStartWorker(wxCommandEvent& WXUNUSED(event))
{
MyWorkerThread *thread = new MyWorkerThread(this);
{
wxLogError("Can't create thread!");
}
-
+
+ m_dlgProgress = new wxProgressDialog
+ (
+ "Progress dialog",
+ "Wait until the thread terminates or press [Cancel]",
+ 100,
+ this,
+ wxPD_CAN_ABORT |
+ wxPD_APP_MODAL |
+ wxPD_ELAPSED_TIME |
+ wxPD_ESTIMATED_TIME |
+ wxPD_REMAINING_TIME
+ );
+
+ // thread is not running yet, no need for crit sect
+ m_cancelled = FALSE;
+
thread->Run();
}
void MyFrame::OnWorkerEvent(wxCommandEvent& event)
{
+#if 0
WriteText( "Got message from worker thread: " );
WriteText( event.GetString() );
WriteText( "\n" );
+#else
+ int n = event.GetInt();
+ if ( n == -1 )
+ {
+ m_dlgProgress->Destroy();
+ m_dlgProgress = (wxProgressDialog *)NULL;
+
+ // the dialog is aborted because the event came from another thread, so
+ // we may need to wake up the main event loop for the dialog to be
+ // really closed
+ wxWakeUpIdle();
+ }
+ else
+ {
+ if ( !m_dlgProgress->Update(n) )
+ {
+ wxCriticalSectionLocker lock(m_critsectWork);
+
+ m_cancelled = TRUE;
+ }
+ }
+#endif
}
+bool MyFrame::Cancelled()
+{
+ wxCriticalSectionLocker lock(m_critsectWork);
+
+ return m_cancelled;
+}
projects / wxWidgets.git / blobdiff