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class Timer
{
private:
static unsigned int TimerCount;
HANDLE m_timerHandle=0;
UINT_PTR timerid;
UINT m_uResolution=0;
UINT resolution=0;
unsigned int TimerID=0;
DWORD intInterval=0;
WNDCLASSEX wc;
static HWND hwnd;
bool blnTimerDestroyed=false;
const char *g_szClassName = "myWindowClass";
static LRESULT CALLBACK TimerWindow(HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam)
{
switch(msg)
{
case WM_TIMER:
{
Timer* obj=reinterpret_cast<Timer*>(wParam);
if(obj->timerprocedure!=nullptr)
{
obj->timerprocedure();
}
else
DebugText("no timer");
}
break;
default:
return DefWindowProc(hwnd, msg, wParam, lParam);
}
return DefWindowProc(hwnd, msg, wParam, lParam);
}
static void CALLBACK MultimediaTimerFunction(UINT wTimerID, UINT msg, DWORD InstancePointer, DWORD dw1, DWORD dw2)
{
Timer* obj=(Timer*)(InstancePointer);
if(obj->timerprocedure!=nullptr)
obj->timerprocedure();
else
DebugText("error no timer");
}
public:
std::function<void()> timerprocedure=EmptyEvent;
Timer(std::function<void()> tmrprocedure=EmptyEvent)
{
TimerCount+=1;
TimerID=TimerCount-1;
timerprocedure=tmrprocedure;
}
void Stop()
{
if(timerid!=0 || timerid!=NULL)
{
if(intInterval<10)
{
// destroy the timer
timeKillEvent(timerid);
// reset the timer
timeEndPeriod (m_uResolution);
}
else
{
if(KillTimer(hwnd,timerid)==FALSE)
DebugText("error on destroying the timer: " + to_string(GetLastError()) + "\ttimer id" + to_string(TimerID));
}
}
}
DWORD GetInterval()
{
return intInterval;
}
void SetInterval(DWORD uintInterval)
{
intInterval = uintInterval;
}
property <DWORD> Interval{GetProperty(Timer::GetInterval),SetProperty(Timer::SetInterval)};
void Start()
{
if(timerid!=0)
Stop();
if(intInterval<10)
{
TIMECAPS tc;
timeGetDevCaps(&tc, sizeof(TIMECAPS));
m_uResolution = min(max(tc.wPeriodMin, 0), tc.wPeriodMax);
timeBeginPeriod(m_uResolution);
timerid=timeSetEvent(intInterval, m_uResolution,&Timer::MultimediaTimerFunction ,(DWORD)this, TIME_PERIODIC | TIME_KILL_SYNCHRONOUS);
}
else
{
if(hwnd==NULL)
{
wc.cbSize = sizeof(WNDCLASSEX);
wc.style = 0;
wc.lpfnWndProc = Timer::TimerWindow;
wc.cbClsExtra = 0;
wc.cbWndExtra = 0;
wc.hInstance = GetModuleHandle(NULL);
wc.hIcon = LoadIcon(NULL, IDI_APPLICATION);
wc.hCursor = LoadCursor(NULL, IDC_ARROW);
wc.hbrBackground = (HBRUSH)(COLOR_WINDOW+1);
wc.lpszMenuName = NULL;
wc.lpszClassName = g_szClassName;
wc.hIconSm = LoadIcon(NULL, IDI_APPLICATION);
if(!RegisterClassEx(&wc))
{
MessageBox(NULL, "Window Registration Failed!", "Error!",
MB_ICONEXCLAMATION | MB_OK);
}
// Step 2: Creating the Window
hwnd = CreateWindowEx(
WS_EX_CLIENTEDGE,
g_szClassName,
"My Timer Window",
WS_OVERLAPPEDWINDOW,
CW_USEDEFAULT, CW_USEDEFAULT, 240, 120,
NULL, NULL, GetModuleHandle(NULL), NULL);
if(hwnd == NULL)
{
MessageBox(NULL, "Window Creation Failed!", "Error!",
MB_ICONEXCLAMATION | MB_OK);
}
ShowWindow(hwnd, SW_HIDE);
UpdateWindow(hwnd);
}
if(hwnd==NULL)
DebugText("no window");
timerid=SetTimer(hwnd, reinterpret_cast<UINT_PTR>(this), intInterval,NULL);
}
if(timerid==0 || timerid==NULL)
DebugText("error: " + to_string(GetLastError()));
}
~Timer()
{
if(timerid!=0)
Stop();
TimerCount-=1;
if(TimerCount==0 && hwnd!=NULL)
DestroyWindow(hwnd);
}
};
unsigned int Timer::TimerCount=0;
HWND Timer::hwnd=NULL;
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