在 win32 api 中使用 c++ 我想跟踪双击和三次点击等等
In win32 api using c++ i want to track double click and triple click and so on
LRESULT handleDoubleClicks(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam, POINT ptLastClickPos, DWORD dwLastClickTime)
{
DWORD dwClickTime = GetMessageTime();
POINT ptClickPos = { GET_X_LPARAM(lParam), GET_Y_LPARAM(lParam) };
switch(message)
{
case WM_LBUTTONDOWN:
if (dwLastClickTime + GetDoubleClickTime() > dwClickTime
&& abs(ptLastClickPos.x - ptClickPos.x) < GetSystemMetrics(SM_CXDOUBLECLK)
&& abs(ptLastClickPos.y - ptClickPos.y) < GetSystemMetrics(SM_CYDOUBLECLK))
{
MessageBox(hWnd, TEXT("Double click"), TEXT("I appear when double clicked"), MB_OKCANCEL);
}
else
{
dwLastClickTime = dwClickTime;
ptLastClickPos = ptClickPos;
wchar_t waCoord[20];
wsprintf(waCoord, _T("(%i,%i)"), ptLastClickPos.x, ptLastClickPos.y);
MessageBox(hWnd, waCoord, _T("Left mouse button click"), MB_OK);
}
break;
default:
return DefWindowProc(hWnd, message, wParam, lParam);
}
}
这是我用来处理双击的函数:
当 windows 收到 WM_LBUTTONDOWN
时调用此函数,它将占用消息的时间和点击的坐标,并将其传输到此处的函数 我希望函数接收另一条消息 WM_LBUTTONDOWN
并判断消息的时间,与上次点击时间和坐标进行比较,判断是否为双击。
但这不起作用。可能是我的方法有误,我是新手请帮助我解决这个问题。
case WM_LBUTTONDOWN:
{
dwLastClickTime= GetMessageTime();
// SetTimer(hWnd,0,GetDoubleClickTime(),0);
ptLastClickPos.x = LOWORD(lParam);
ptLastClickPos.y = HIWORD(lParam);
handleDoubleClicks(hWnd, message, wParam, lParam, ptLastClickPos, dwLastClickTime);
}
可以使用SetTimer
,点击一次后,不是立即判断为点击,而是启动定时器,检查定时器范围内是否还有点击,如果有则判断为双击,如果没有,则上次判定为单击。
#define TIMER_ID 10
static int click_count = 0;
static POINT point = { 0 };
LRESULT CALLBACK WndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)
{
switch (message)
{
case WM_TIMER:
{
KillTimer(hWnd, TIMER_ID);
if (click_count == 1)
{
wchar_t waCoord[20];
wsprintf(waCoord, _T("(%i,%i)"), point.x, point.y);
MessageBox(hWnd, waCoord, _T("Left mouse button click"), MB_OK);
}
else if(click_count == 2)
{
MessageBox(hWnd, TEXT("Double click"), TEXT("I appear when double clicked"), MB_OKCANCEL);
}
else if (click_count == 3)
{
MessageBox(hWnd, TEXT("Triple click"), TEXT("I appear when triple clicked"), MB_OKCANCEL);
}
click_count = 0;
return 0;
}
break;
case WM_LBUTTONDOWN:
{
if (click_count == 0)
{
SetTimer(hWnd, TIMER_ID, GetDoubleClickTime(), NULL);
}
click_count++;
return 0;
}
break;
case WM_PAINT:
{
PAINTSTRUCT ps;
HDC hdc = BeginPaint(hWnd, &ps);
// TODO: Add any drawing code that uses hdc here...
EndPaint(hWnd, &ps);
}
break;
case WM_DESTROY:
PostQuitMessage(0);
break;
default:
return DefWindowProc(hWnd, message, wParam, lParam);
}
return 0;
}
并确保您的 window 没有 CS_DBLCLKS
样式。否则,根据文档,通常生成的第二条 WM_LBUTTONDOWN
消息将变为 WM_LBUTTONDBLCLK
消息:Double Clicks
LRESULT handleDoubleClicks(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam, POINT ptLastClickPos, DWORD dwLastClickTime)
{
DWORD dwClickTime = GetMessageTime();
POINT ptClickPos = { GET_X_LPARAM(lParam), GET_Y_LPARAM(lParam) };
switch(message)
{
case WM_LBUTTONDOWN:
if (dwLastClickTime + GetDoubleClickTime() > dwClickTime
&& abs(ptLastClickPos.x - ptClickPos.x) < GetSystemMetrics(SM_CXDOUBLECLK)
&& abs(ptLastClickPos.y - ptClickPos.y) < GetSystemMetrics(SM_CYDOUBLECLK))
{
MessageBox(hWnd, TEXT("Double click"), TEXT("I appear when double clicked"), MB_OKCANCEL);
}
else
{
dwLastClickTime = dwClickTime;
ptLastClickPos = ptClickPos;
wchar_t waCoord[20];
wsprintf(waCoord, _T("(%i,%i)"), ptLastClickPos.x, ptLastClickPos.y);
MessageBox(hWnd, waCoord, _T("Left mouse button click"), MB_OK);
}
break;
default:
return DefWindowProc(hWnd, message, wParam, lParam);
}
}
这是我用来处理双击的函数:
当 windows 收到 WM_LBUTTONDOWN
时调用此函数,它将占用消息的时间和点击的坐标,并将其传输到此处的函数 我希望函数接收另一条消息 WM_LBUTTONDOWN
并判断消息的时间,与上次点击时间和坐标进行比较,判断是否为双击。
但这不起作用。可能是我的方法有误,我是新手请帮助我解决这个问题。
case WM_LBUTTONDOWN:
{
dwLastClickTime= GetMessageTime();
// SetTimer(hWnd,0,GetDoubleClickTime(),0);
ptLastClickPos.x = LOWORD(lParam);
ptLastClickPos.y = HIWORD(lParam);
handleDoubleClicks(hWnd, message, wParam, lParam, ptLastClickPos, dwLastClickTime);
}
可以使用SetTimer
,点击一次后,不是立即判断为点击,而是启动定时器,检查定时器范围内是否还有点击,如果有则判断为双击,如果没有,则上次判定为单击。
#define TIMER_ID 10
static int click_count = 0;
static POINT point = { 0 };
LRESULT CALLBACK WndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)
{
switch (message)
{
case WM_TIMER:
{
KillTimer(hWnd, TIMER_ID);
if (click_count == 1)
{
wchar_t waCoord[20];
wsprintf(waCoord, _T("(%i,%i)"), point.x, point.y);
MessageBox(hWnd, waCoord, _T("Left mouse button click"), MB_OK);
}
else if(click_count == 2)
{
MessageBox(hWnd, TEXT("Double click"), TEXT("I appear when double clicked"), MB_OKCANCEL);
}
else if (click_count == 3)
{
MessageBox(hWnd, TEXT("Triple click"), TEXT("I appear when triple clicked"), MB_OKCANCEL);
}
click_count = 0;
return 0;
}
break;
case WM_LBUTTONDOWN:
{
if (click_count == 0)
{
SetTimer(hWnd, TIMER_ID, GetDoubleClickTime(), NULL);
}
click_count++;
return 0;
}
break;
case WM_PAINT:
{
PAINTSTRUCT ps;
HDC hdc = BeginPaint(hWnd, &ps);
// TODO: Add any drawing code that uses hdc here...
EndPaint(hWnd, &ps);
}
break;
case WM_DESTROY:
PostQuitMessage(0);
break;
default:
return DefWindowProc(hWnd, message, wParam, lParam);
}
return 0;
}
并确保您的 window 没有 CS_DBLCLKS
样式。否则,根据文档,通常生成的第二条 WM_LBUTTONDOWN
消息将变为 WM_LBUTTONDBLCLK
消息:Double Clicks