csystimeoverlaycontroller.cpp

简单的COM 实际例子 用法1

//
// CSysTimeOverlayController.cpp
//

#include <streams.h>
#include <stdio.h>
#include "CSysTimeOverlayController.h"

////////////////////////////////////////////////////////////////////////////////////
CSysTimeOverlayController::CSysTimeOverlayController()
{
}

CSysTimeOverlayController::~CSysTimeOverlayController()
{
}

// System time is as such format: YYYY-MM-DD(HH:MM:SS)
BOOL CSysTimeOverlayController::StartTitleOverlay(void)
{	
	mCanDoOverlay = (mPixelConverter != 0);
	if (mCanDoOverlay)
	{
		// System overlay's default start position is left-top corner
		memset(&mStartPos, 0, sizeof(POINT));
		// Allocate a certain count title buffer
		ReleaseTitleBuffer();
		mTitle = new char[100];
	}
	return mCanDoOverlay;
}

BOOL CSysTimeOverlayController::BeforeActualOverlay(void)
{
	// Update the current system time
	SYSTEMTIME    systemTime, localTime;
	GetSystemTime(&systemTime);   // This is Coordinated Universal Time (UTC)
	SystemTimeToTzSpecificLocalTime(NULL, &systemTime, &localTime);
	sprintf(mTitle, "%4d-%02d-%02d(%02d:%02d:%02d)", localTime.wYear, localTime.wMonth, 
		localTime.wDay, localTime.wHour, localTime.wMinute, localTime.wSecond);
	// Update the title DIB bits
	BOOL pass = CreateTitleDIBBits();
	return pass;
}

BOOL CSysTimeOverlayController::AfterActualOverlay(void)
{
	return TRUE;
}