bool CWndScroller::_OnMouseWheel(UINT nFlags, short zDelta, CPoint pt)
{
if (mp_origWnd == NULL) return true;
//if vertical scrollbar is not enabled than nothing to do
int scrlMin = 0, scrlMax = 0;
mp_origWnd->GetScrollRange(SB_VERT, &scrlMin, &scrlMax);
if (scrlMin == scrlMax) return true;
int scrlLnPerInc = 0, scrlIncNum = (abs(zDelta) / WHEEL_DELTA);
::SystemParametersInfo(SPI_GETWHEELSCROLLLINES, 0, &scrlLnPerInc, 0);
//check if page scroll has requested.
if (scrlLnPerInc == WHEEL_PAGESCROLL)
{
_OnVScroll(zDelta <= 0 ? SB_PAGEDOWN : SB_PAGEUP, 0, NULL);
return true;
}
int numScrlLines = std::max((scrlIncNum * scrlLnPerInc) / 3, 1);
for(int i = 0; i < numScrlLines; ++i)
_OnVScroll(zDelta <= 0 ? SB_LINEDOWN : SB_LINEUP, 0, NULL);
return true;
}
LRESULT CWndScroller::WndProcSub(UINT uMsg, WPARAM wParam, LPARAM lParam)
{
if (lParam) //Do nothing if it is not standard scroll bar
return CWindowSubClasser::WndProcSub(uMsg, wParam, lParam);
switch(uMsg)
{
case WM_HSCROLL:
_OnHScroll(LOWORD(wParam), HIWORD(wParam), reinterpret_cast<HWND>(lParam));
break;
case WM_VSCROLL:
_OnVScroll(LOWORD(wParam), HIWORD(wParam), reinterpret_cast<HWND>(lParam));
break;
case WM_MOUSEWHEEL:
_OnMouseWheel(LOWORD(wParam), HIWORD(wParam), CPoint(LOWORD(lParam), HIWORD(lParam)));
break;
case WM_SIZE:
_UpdateScrollInfo();
break;
default:
return CWindowSubClasser::WndProcSub(uMsg, wParam, lParam);
}
return 0;
}
LRESULT CALLBACK CCandidateWindow::_WindowProcCallback(_In_ HWND wndHandle, UINT uMsg, _In_ WPARAM wParam, _In_ LPARAM lParam)
{
switch (uMsg)
{
case WM_CREATE:
{
HDC dcHandle = nullptr;
dcHandle = GetDC(wndHandle);
if (dcHandle)
{
HFONT hFontOld = (HFONT)SelectObject(dcHandle, Global::defaultlFontHandle);
GetTextMetrics(dcHandle, &_TextMetric);
_cxTitle = _TextMetric.tmMaxCharWidth * _wndWidth;
SelectObject(dcHandle, hFontOld);
ReleaseDC(wndHandle, dcHandle);
}
}
return 0;
case WM_DESTROY:
_DeleteShadowWnd();
return 0;
case WM_WINDOWPOSCHANGED:
{
WINDOWPOS* pWndPos = (WINDOWPOS*)lParam;
// move shadow
if (_pShadowWnd)
{
_pShadowWnd->_OnOwnerWndMoved((pWndPos->flags & SWP_NOSIZE) == 0);
}
// move v-scroll
if (_pVScrollBarWnd)
{
_pVScrollBarWnd->_OnOwnerWndMoved((pWndPos->flags & SWP_NOSIZE) == 0);
}
_FireMessageToLightDismiss(wndHandle, pWndPos);
}
break;
case WM_WINDOWPOSCHANGING:
{
WINDOWPOS* pWndPos = (WINDOWPOS*)lParam;
// show/hide shadow
if (_pShadowWnd)
{
if ((pWndPos->flags & SWP_HIDEWINDOW) != 0)
{
_pShadowWnd->_Show(FALSE);
}
// don't go behaind of shadow
if (((pWndPos->flags & SWP_NOZORDER) == 0) && (pWndPos->hwndInsertAfter == _pShadowWnd->_GetWnd()))
{
pWndPos->flags |= SWP_NOZORDER;
}
_pShadowWnd->_OnOwnerWndMoved((pWndPos->flags & SWP_NOSIZE) == 0);
}
// show/hide v-scroll
if (_pVScrollBarWnd)
{
if ((pWndPos->flags & SWP_HIDEWINDOW) != 0)
{
_pVScrollBarWnd->_Show(FALSE);
}
_pVScrollBarWnd->_OnOwnerWndMoved((pWndPos->flags & SWP_NOSIZE) == 0);
}
}
break;
case WM_SHOWWINDOW:
// show/hide shadow
if (_pShadowWnd)
{
_pShadowWnd->_Show((BOOL)wParam);
}
// show/hide v-scroll
if (_pVScrollBarWnd)
{
_pVScrollBarWnd->_Show((BOOL)wParam);
}
break;
case WM_PAINT:
{
HDC dcHandle = nullptr;
PAINTSTRUCT ps;
dcHandle = BeginPaint(wndHandle, &ps);
_OnPaint(dcHandle, &ps);
_DrawBorder(wndHandle, CANDWND_BORDER_WIDTH*2);
EndPaint(wndHandle, &ps);
}
return 0;
case WM_SETCURSOR:
{
POINT cursorPoint;
GetCursorPos(&cursorPoint);
MapWindowPoints(NULL, wndHandle, &cursorPoint, 1);
// handle mouse message
_HandleMouseMsg(HIWORD(lParam), cursorPoint);
}
return 1;
case WM_MOUSEMOVE:
case WM_LBUTTONDOWN:
case WM_MBUTTONDOWN:
case WM_RBUTTONDOWN:
case WM_LBUTTONUP:
case WM_MBUTTONUP:
case WM_RBUTTONUP:
{
POINT point;
POINTSTOPOINT(point, MAKEPOINTS(lParam));
// handle mouse message
_HandleMouseMsg(uMsg, point);
}
// we processes this message, it should return zero.
return 0;
case WM_MOUSEACTIVATE:
{
WORD mouseEvent = HIWORD(lParam);
if (mouseEvent == WM_LBUTTONDOWN ||
mouseEvent == WM_RBUTTONDOWN ||
mouseEvent == WM_MBUTTONDOWN)
{
return MA_NOACTIVATE;
}
}
break;
case WM_POINTERACTIVATE:
return PA_NOACTIVATE;
case WM_VSCROLL:
_OnVScroll(LOWORD(wParam), HIWORD(wParam));
return 0;
}
return DefWindowProc(wndHandle, uMsg, wParam, lParam);
}
