Microsoft KB Archive/111650: Difference between revisions
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<pre class="CODESAMP">case WM_PAINT: | <pre class="CODESAMP">case WM_PAINT: | ||
hDC = BeginPaint(hWnd, & | hDC = BeginPaint(hWnd, &ps); | ||
SetRect(& | SetRect(&rc, 0,0,100,100); | ||
DrawFocusRect(hDC, & | DrawFocusRect(hDC, &rc); // Works as documented. | ||
SetMapMode(hDC, MM_LOMETRIC); | SetMapMode(hDC, MM_LOMETRIC); | ||
SetRect(& | SetRect(&rc, 1,-200,100,-300); | ||
DrawFocusRect(hDC, & | DrawFocusRect(hDC, &rc); // Doesn't do anything. | ||
Rectangle(hDC, rc.left, rc.top, rc.right, rc.bottom); // Works | Rectangle(hDC, rc.left, rc.top, rc.right, rc.bottom); // Works | ||
EndPaint(hWnd, & | EndPaint(hWnd, &ps); | ||
break; </pre> | break; </pre> | ||
<br /> | <br /> |
Latest revision as of 12:26, 21 July 2020
BUG: DrawFocusRect Fails in MM_LOMETRIC or MM_ISOTROPIC Mode |
Q111650
The information in this article applies to:
- Microsoft Windows Software Development Kit (SDK) versions 3.0, 3.1
SYMPTOMS
If DrawFocusRect() is called when the mapping mode is MM_LOMETRIC or MM_ISOTROPIC, no rectangle is drawn.
DrawFocusRect() is documented to take logical units and works properly in MM_TEXT mapping mode. However, if the mapping mode is changed to MM_LOMETRIC or MM_ISOTROPIC, as in the following code fragment, DrawFocusRect() called with an appropriate rectangle (logical units) does not work. Calling Rectangle() with the same rectangle does work.
case WM_PAINT: hDC = BeginPaint(hWnd, &ps); SetRect(&rc, 0,0,100,100); DrawFocusRect(hDC, &rc); // Works as documented. SetMapMode(hDC, MM_LOMETRIC); SetRect(&rc, 1,-200,100,-300); DrawFocusRect(hDC, &rc); // Doesn't do anything. Rectangle(hDC, rc.left, rc.top, rc.right, rc.bottom); // Works EndPaint(hWnd, &ps); break;
STATUS
Microsoft has confirmed this to be a bug in Windows versions 3.0 and 3.1.
Additional query words:
Keywords : kbGDI
Issue type : kbbug
Technology : kbAudDeveloper kbWin3xSearch kbSDKSearch kbWinSDKSearch kbWinSDK300 kbWinSDK310
Last Reviewed: November 6, 1999 |