如何在对话框背景中运行线程？ [英] How to run thread in Background of Dialog Box?

问题描述

Hello Everyone，



我正在处理一个有对话框的应用程序。在对话框的一侧有一个自定义，另一侧有Tab Control。使用自定义控件显示条形图，该条形图根据通过USB端口接收的值连续更新。在Tab控件的其中一个选项卡（子对话框）上我放置了一个滑块控件。



我在中为Bar控件编写了线程OnInitDialog（）主对话框的功能。一旦我在子窗口上移动滑块控件，条形控件就会停止更新。在释放滑块控件后，我该怎么做才能再次启动该线程？



我现在无法对GUI进行任何更改。如何从子窗口再次调用线程？



这是创建线程和线程函数的代码。

 BOOL CMonitorMediaSensor :: OnInitDialog（）
 {
 CDialogEx :: OnInitDialog（）; 
 
 
 SetBackgroundColor（g_DlgColor）; 
 
 
  //   TODO：在这里添加额外的初始化 
 
 m_chart.SubclassDlgItem（IDC_CUSTOMSENSORBAR， this ）; 
 m_chart.PrepareColors（CNSChartCtrl :: SimpleColors）; 
 m_chart.AddValue（m_nSensorValue， 传感器值）; 
 m_chart.m_nMode =  0 ; 
 
  //  创建标签：用于显示校准栏 
 m_SnapDlg =  new  CMediaSensorSnapDlg; 
 m_SnapDlg->创建（CMediaSensorSnapDlg :: IDD，& m_SnapTabCtrl）; 
 m_SnapTabCtrl.AddTab（m_SnapDlg，  Calibrate， 0 ）; 
 m_SnapDlg-> m_pSnapTabCtrl =& m_SnapTabCtrl; 
 m_SnapDlg-> m_chart.m_nMode =  1 ; 
 
  //  创建标签：用于媒体分析。 
 m_SnapDlgMonitor =  new  CMediaSensorSnapDlg; 
 m_SnapDlgMonitor-> Create（CMediaSensorSnapDlg :: IDD，& m_SnapTabCtrl）; 
 m_SnapTabCtrl.AddTab（m_SnapDlgMonitor， 分析， 1 ）; 
 m_SnapDlgMonitor-> m_pSnapTabCtrl =& m_SnapTabCtrl; 
 m_SnapDlgMonitor-> m_chart.m_nMode =  0 ; 
 
  //  创建标签：用于传感器增益调整 
 m_SensorGainDlg =  new  CSensorGain; 
 m_SensorGainDlg->创建（CSensorGain :: IDD，& m_SnapTabCtrl）; 
 m_SnapTabCtrl.AddTab（m_SensorGainDlg， 传感器增益， 2 ）; 
 m_SnapDlgMonitor-> m_pSnapTabCtrl =& m_SnapTabCtrl; 
  //   m_SnapDlgMonitor-> m_chart.m_nMode = 0;  
 
 m_SnapTabCtrl.SetCurFocus（ 1 ）; 
 
 
  / *   
启动媒体传感器线程。线程将命令发送到USB端口以获得
当前媒体传感器值。 
 * /  
 g_portio-> m_bClos​​eMediaSensorThread = FALSE; 
 m_bClos​​eSensorMonitorThread = FALSE; 
 
 m_MediaSensorData =  new  MEDIASENSORDATA; 
 
 m_MediaSensorData-> pbClos​​eThread =& m_bClos​​eSensorMonitorThread; 
 m_MediaSensorData-> pCS =& g_portio-> m_CS; 
 
 
  / *  创建线程。 * /  
 m_hMediaSensor = AfxBeginThread（MonitorMediaSensorProc，
（ void  *）m_MediaSensorData，
 THREAD_PRIORITY_NORMAL， 0 ， 0 ）; 
 
 
  return  TRUE;  //  除非您将焦点设置为控件 
  //   EXCEPTION：OCX Property Pages应返回FALSE  
} 
 
 
 
 UINT MonitorMediaSensorProc（LPVOID pParam）
 {
 MEDIASENSORDATA * monData =（MEDIASENSORDATA *）pParam; 
 BOOL * pbClos​​eThread = monData-> pbClos​​eThread; 
 CCriticalSection * pcs = monData-> pCS; 
 
 CSingleLock lock（pcs）; 
  char  szQueryCommand [ 6 ]; 
 
 szQueryCommand [ 0 ] = g_cSTX; 
 szQueryCommand [ 1 ] = '  K' ; 
 szQueryCommand [ 2 ] = '  L' ; 
 szQueryCommand [ 3 ] = g_cCR; 
 szQueryCommand [ 4 ] = 0x0A; 
 szQueryCommand [ 5 ] = '  \ 0' ; 
 
  while （ 1 ）
 {
 < span class =code-keyword> if （lock.Lock（））
 {
  if （g_portio-> m_bClos​​eMediaSensorThread || * pbClos​​eThread）
 {
 
 lock.Unlock（）; 
 
  delete （monData）; 
 monData = NULL; 
  return   0 ; 
} 
 
  / *  向USB端口发送查询命令。 * /  
 g_portio-> SendData（szQueryCommand， 6 ）; 
 
 lock.Unlock（）; 
} 
 
睡眠（ 100 ）; 
} 
 
  return   0 ; 
} 

解决方案

现在它正常工作。

我在孩子身上做错了什么窗口。

Hello Everyone,

I am working on an application in which there is a dialog box. On one side of a dialog box there is a custom and on other side there is Tab Control. Am using the custom control for displaying a Bar graph which is updating continuously depending on the values am receiving via USB port. On one of the tabs(child dialog) of Tab control I have placed a slider control.

I have written the thread for Bar control in OnInitDialog() function of the main dialog box. As soon as I move the slider control on child window, the bar control stops updating. What should I do to start that thread again after I release the slider control?

I can''t make any changes in the GUI now. How can I call the thread again from the child window?

Here is the code where am creating the thread and the thread function.

BOOL CMonitorMediaSensor::OnInitDialog()
{
	CDialogEx::OnInitDialog();
	

        SetBackgroundColor (g_DlgColor);


	// TODO:  Add extra initialization here

	m_chart.SubclassDlgItem(IDC_CUSTOMSENSORBAR, this);
	m_chart.PrepareColors(CNSChartCtrl::SimpleColors);
	m_chart.AddValue(m_nSensorValue,"Sensor Value");
	m_chart.m_nMode = 0;

	// Create Tab: Used to display calibration Bar
	m_SnapDlg = new CMediaSensorSnapDlg;
	m_SnapDlg->Create(CMediaSensorSnapDlg::IDD, &m_SnapTabCtrl);
	m_SnapTabCtrl.AddTab(m_SnapDlg, "Calibrate", 0);
	m_SnapDlg->m_pSnapTabCtrl = &m_SnapTabCtrl;
	m_SnapDlg->m_chart.m_nMode = 1;

	// Create Tab: Used for Media Profiling.
	m_SnapDlgMonitor  = new CMediaSensorSnapDlg;
	m_SnapDlgMonitor->Create(CMediaSensorSnapDlg::IDD, &m_SnapTabCtrl);
	m_SnapTabCtrl.AddTab(m_SnapDlgMonitor, "Profiling", 1);
	m_SnapDlgMonitor->m_pSnapTabCtrl = &m_SnapTabCtrl;
	m_SnapDlgMonitor->m_chart.m_nMode = 0;

	  // Create tab: Used for Sensor Gain Adjustment
	m_SensorGainDlg  = new CSensorGain;
	m_SensorGainDlg->Create(CSensorGain::IDD, &m_SnapTabCtrl);
	m_SnapTabCtrl.AddTab(m_SensorGainDlg, "Sensor Gain", 2);
	m_SnapDlgMonitor->m_pSnapTabCtrl = &m_SnapTabCtrl;
	//m_SnapDlgMonitor->m_chart.m_nMode = 0;
	
	m_SnapTabCtrl.SetCurFocus (1);
   

	/* 
		Start Media sensor thread. Thread sends commands to USB Port to get 
                current media sensor values. 
	*/
	g_portio->m_bCloseMediaSensorThread = FALSE;
	m_bCloseSensorMonitorThread = FALSE;
	
	m_MediaSensorData = new MEDIASENSORDATA;

	m_MediaSensorData->pbCloseThread	= &m_bCloseSensorMonitorThread;
	m_MediaSensorData->pCS				= &g_portio->m_CS;


	/* Create thread. */
	m_hMediaSensor = AfxBeginThread (MonitorMediaSensorProc,
					(void*)m_MediaSensorData,
					THREAD_PRIORITY_NORMAL, 0, 0);
	

	return TRUE;  // return TRUE unless you set the focus to a control
	// EXCEPTION: OCX Property Pages should return FALSE
}

			
 
UINT MonitorMediaSensorProc (LPVOID	pParam)
{
	MEDIASENSORDATA*	monData		= (MEDIASENSORDATA*) pParam;
	BOOL*			pbCloseThread	= monData->pbCloseThread;
	CCriticalSection*	pcs		= monData->pCS;

	CSingleLock		lock(pcs);
	char	                szQueryCommand[6];

	szQueryCommand[0] = g_cSTX;
	szQueryCommand[1] = 'K';
	szQueryCommand[2] = 'L';
	szQueryCommand[3] = g_cCR;
	szQueryCommand[4] = 0x0A;
	szQueryCommand[5] = '\0';

	while (1)
	{
		if(lock.Lock ())
		{
			if(g_portio->m_bCloseMediaSensorThread || *pbCloseThread)
			{
			
				lock.Unlock ();

				delete(monData);
				monData = NULL;
				return 0;
			}
			
			/* Send query command to USB Port. */
			g_portio->SendData (szQueryCommand, 6);
	
			lock.Unlock ();
		}

		Sleep (100);
	}

	return 0;
}

解决方案

Its working properly now.
I was doing something wrong on the child window.

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