LRESULT CALLBACK WndProc_Draw(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)
{
int wmId, wmEvent;
PAINTSTRUCT ps;
HDC hdc, hdcSource, hdcMemory;
HBITMAP hBitmap, hBitmapOld;
HWND hWndDraw;
switch (message)
{
case WM_COMMAND:
wmId = LOWORD(wParam);
wmEvent = HIWORD(wParam);
// Parse the menu selections:
switch (wmId)
{
case IDM_EXIT:
DestroyWindow(hWnd);
break;
default:
return DefWindowProc(hWnd, message, wParam, lParam);
}
break;
case WM_PAINT:
hdc = BeginPaint(hWnd, &ps);
hdcSource = GetDC(NULL);
hdcMemory = CreateCompatibleDC(hdcSource);
RECT rect; int w, h;
if (GetWindowRect(hWnd, &rect))
{
w = rect.right - rect.left;
h = rect.bottom - rect.top;
}
hBitmap = CreateCompatibleBitmap(hdcSource, w, h);
hBitmapOld = (HBITMAP)SelectObject(hdcMemory, hBitmap);
BitBlt(hdc, 0, 0, w, h, hdcSource, 0, 23, SRCCOPY);
hBitmap = (HBITMAP)SelectObject(hdcMemory, hBitmapOld);
DeleteDC(hdcSource);
DeleteDC(hdcMemory);
EndPaint(hWnd, &ps);
break;
case WM_LBUTTONDOWN:
paint = TRUE;
px1 = px2 = GET_X_LPARAM(lParam);
py1 = py2 = GET_Y_LPARAM(lParam);
break;
case WM_MOUSEMOVE:
if (!paint)
break;
hdc = GetDC(hWnd);
px2 = GET_X_LPARAM(lParam);
py2 = GET_Y_LPARAM(lParam);
HPEN hPen;
hPen = CreatePen(PS_SOLID, 5, RGB(255, 0, 0));
SelectObject(hdc, hPen);
MoveToEx(hdc, px1, py1, NULL);
LineTo(hdc, px2, py2);
px1 = px2;
py1 = py2;
ReleaseDC(hWnd, hdc);
break;
case WM_LBUTTONUP:
paint = FALSE;
break;
case WM_DESTROY:
draw = FALSE;
UpdateDraw();
break;
default:
return DefWindowProc(hWnd, message, wParam, lParam);
}
return 0;
}
void SummaryWindow::PeriodChanged(Draw *draw, PeriodType period) {
UpdateDraw(draw);
}
void SummaryWindow::DoubleCursorChanged(DrawsController *draws_controller) {
for (size_t i = 0; i < draws_controller->GetDrawsCount(); i++)
UpdateDraw(draws_controller->GetDraw(i));
}
void SummaryWindow::AverageValueCalculationMethodChanged(Draw *draw) {
UpdateDraw(draw);
}
void SummaryWindow::StatsChanged(Draw *draw) {
UpdateDraw(draw);
}
