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SDL2, win32: properly handle negative mouse coordinates

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This commit is contained in:
Thomas Bernard
2019-02-04 18:37:35 +01:00
parent 206c67e77c
commit 4c7c5bde77
3 changed files with 70 additions and 46 deletions
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35
src/win32screen.c
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@@ -185,32 +185,47 @@ static LRESULT CALLBACK Win32_WindowProc(HWND hwnd, UINT uMsg, WPARAM wParam, LP
case WM_NCMOUSEMOVE: // Mouse move in the non client area of the window
break;
case WM_MOUSEMOVE:
//Hide_cursor();
Input_new_mouse_X = (LOWORD(lParam))/Pixel_width;
Input_new_mouse_Y = (HIWORD(lParam))/Pixel_height;
//Display_cursor();
Move_cursor_with_constraints();
user_feedback_required = 1;
{
int mouse_clip = 0;
int x, y;
x = GET_X_LPARAM(lParam);
y = GET_Y_LPARAM(lParam);
if (x < 0)
{
mouse_clip = 1;
Input_new_mouse_X = 0;
}
else
Input_new_mouse_X = x / Pixel_width;
if (y < 0)
{
mouse_clip = 1;
Input_new_mouse_Y = 0;
}
else
Input_new_mouse_Y = y / Pixel_height;
user_feedback_required = Move_cursor_with_constraints(mouse_clip);
}
return 0;
case WM_LBUTTONDOWN:
Input_new_mouse_K |= 1;
Move_cursor_with_constraints();
Move_cursor_with_constraints(0);
user_feedback_required = 1;
return 0;
case WM_LBUTTONUP:
Input_new_mouse_K &= ~1;
Move_cursor_with_constraints();
Move_cursor_with_constraints(0);
user_feedback_required = 1;
return 0;
// WM_LBUTTONDBLCLK
case WM_RBUTTONDOWN:
Input_new_mouse_K |= 2;
Move_cursor_with_constraints();
Move_cursor_with_constraints(0);
user_feedback_required = 1;
return 0;
case WM_RBUTTONUP:
Input_new_mouse_K &= ~2;
Move_cursor_with_constraints();
Move_cursor_with_constraints(0);
user_feedback_required = 1;
return 0;
// WM_RBUTTONDBLCLK