Check if scrollbar and parent are visible before redraw.

d054b412 · Patrik Stridvall · Alexandre Julliard · 0913cdf0 · d054b412
Commit d054b412 authored Oct 24, 1998 by Patrik Stridvall Committed by Alexandre Julliard Oct 24, 1998
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scroll.c controls/scroll.c +1 -0

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--- a/controls/scroll.c
+++ b/controls/scroll.c
@@ -565,6 +565,7 @@ void SCROLL_DrawScrollBar( HWND32 hwnd, HDC32 hdc, INT32 nBar,
    if (!wndPtr || !infoPtr ||
        ((nBar == SB_VERT) && !(wndPtr->dwStyle & WS_VSCROLL)) ||
        ((nBar == SB_HORZ) && !(wndPtr->dwStyle & WS_HSCROLL))) return;
+    if (!WIN_IsWindowDrawable( wndPtr, FALSE )) return;

    vertical = SCROLL_GetScrollBarRect( hwnd, nBar, &rect,
                                        &arrowSize, &thumbSize, &thumbPos );