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fix bug : width of multiline text label

This commit is contained in:
Weijie Zhao 2019-05-08 16:01:11 +08:00
parent 17486fd175
commit 59cc0feb66
1 changed files with 28 additions and 6 deletions
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34
windows/text.cpp
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@ -48,8 +48,11 @@ int uiWindowsWindowTextWidth(HWND hwnd)
size.cx = 0;
size.cy = 0;
//save the max width of multiline text
auto maxWidth = size.cx;
text = windowTextAndLen(hwnd, &len);
WCHAR *start = text, *end = text;
if (len == 0) // no text; nothing to do
goto noTextOrError;
@ -66,12 +69,31 @@ int uiWindowsWindowTextWidth(HWND hwnd)
ReleaseDC(hwnd, dc);
goto noTextOrError;
}
if (GetTextExtentPoint32W(dc, text, len, &size) == 0) {
logLastError(L"error getting text extent point");
// continue anyway, assuming size is 0
size.cx = 0;
size.cy = 0;
// calculate width of each line
while(start != text + len) {
while(*start == '\n' && start != text + len) {
start++;
}
if(start == text + len) {
break;
}
end = start + 1;
while(*end != '\n' && end != text + len){
end++;
}
if (GetTextExtentPoint32W(dc, start, end - start, &size) == 0) {
logLastError(L"error getting text extent point");
// continue anyway, assuming size is 0
size.cx = 0;
size.cy = 0;
}
if(size.cx > maxWidth) {
maxWidth = size.cx;
}
start = end;
}
// continue on errors; we got what we want
if (SelectObject(dc, prevfont) != hMessageFont)
logLastError(L"error restoring previous font into device context");
@ -79,7 +101,7 @@ int uiWindowsWindowTextWidth(HWND hwnd)
logLastError(L"error releasing DC");
uiprivFree(text);
return size.cx;
return maxWidth;
noTextOrError:
uiprivFree(text);