我閱讀了一些關於如何將數據從Workerthread傳遞到主窗口(對話框)的主題,但我仍然不明白,仍然需要幫助。 我的workerthread應該處理一些計算,並在每個循環中將結果顯示在GUI上進行編輯。我知道,我應該使用PostMessage的,但因爲我正在做的計算意味着控制元件,我不知道如何解決這個問題?MFC - 通過PostMessage發佈數據到GUI
//CWorkerThreadMgr.h manages the second thread
HRESULT Start (HWND hWnd);// from where the workerthread will be started
HWND m_hWnd ; //Window handle to the UI ;
HANDLE m_hTread; //handle of the worker thread
static UINT WINAPI ThreadProc(LPVOID lptest);
static UINT WINAPI ThreadProc(LPVOID lptest)
{
CWorkerThreadMgr* pCalculateMgr = reinterpret_cast< CWorkerThreadMgr*(lptest);
//The following operation:rand() *m_Slider.GetPos() should
//should be calculated and the result displayed each time in the edit box in the gui
for(UINT uCount = 0; uCount < 40; uCount++){
pCalculateMgr->rand() *m_Slider.GetPos();//?don't allowed to touch the gui!!
PostMessage(pCalculateMgr-> m_hWnd, WM_SENDCALCULATED_VALUE,wparam(rand() *m_Slider.GetPos(),0);
}
}
LRESULT CStartCalculationDlg::OnSendCalculatedValue(WPARAM Result, LPARAM)
{
// The resut should be displayed in the edit box
m_Calculation.Format(_T("%d"),???);
SetDlgItemText(IDC_CALCULATION, m_Calculation);
return 1;
}
void CStartCalculationDlg::OnHScroll(UINT nSBCode, UINT nPos,CScrollBar* pScrollBar)
{
m_SliderValue.Format(_T("%d"),m_Slider.GetPos());
SetDlgItemText(IDC_SLIDER_VALUE,m_SliderValue);
}
// Implementation in the CStartCalculationDlg.h
CWorkerThreadMgr m_WorkerThreadMgr //instance of the WorkerThreadMgr
CSliderCtrl m_Slider //member variable of the slider control
CString m_SliderValue // member variable of the edit box, where the current value of the
//slider will be displayed
CString m_Calculation // member variable of the edit box where the calculated
//result from the workerthread will be displayed via PostMessage
afx_msg LRESULT OnSendCalculatedValue(WPARAM, LPARAM);
afx_msg void OnHScroll(UINT nSBCode, UINT nPos, CScrollBar* pScrollBar);
下probem的是,當我的滑塊控件被移動並獲得一個新的值,線程過程應該知道它並更新滑塊的值。我怎樣才能做到這一點?
你可以將滑塊位置作爲參數傳遞給線程嗎? – Jeeva 2012-04-02 03:32:36