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[0.4.9] cherry-pick [MSPAINT] Fix divide by zero in drawZoomFrame

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CORE-14539 #resolve

(cherry picked from commit 8c726ae0d2)
This commit is contained in:
Stanislav Motylkov 2018-05-24 00:31:20 +03:00 committed by Joachim Henze
parent 22a0c675ba
commit 16d7d9d27c
1 changed files with 8 additions and 2 deletions
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10
base/applications/mspaint/imgarea.cpp
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@ -41,8 +41,14 @@ void CImgAreaWindow::drawZoomFrame(int mouseX, int mouseY)
int x, y, w, h;
scrollboxWindow.GetClientRect(&clientRectScrollbox);
GetClientRect(&clientRectImageArea);
w = clientRectImageArea.right * clientRectScrollbox.right / (clientRectImageArea.right * 2);
h = clientRectImageArea.bottom * clientRectScrollbox.bottom / (clientRectImageArea.bottom * 2);
w = clientRectImageArea.right * 2;
h = clientRectImageArea.bottom * 2;
if (!w || !h)
{
return;
}
w = clientRectImageArea.right * clientRectScrollbox.right / w;
h = clientRectImageArea.bottom * clientRectScrollbox.bottom / h;
x = max(0, min(clientRectImageArea.right - w, mouseX - w / 2));
y = max(0, min(clientRectImageArea.bottom - h, mouseY - h / 2));