+ // Only necessary if we want a horizontal scrollbar
+ if (!(m_windowStyle & wxHSCROLL))
+ return;
+ TEXTMETRIC lpTextMetric;
+
+ if ( !s.IsEmpty() )
+ {
+ int existingExtent = (int)SendMessage(GetHwnd(), LB_GETHORIZONTALEXTENT, 0, 0L);
+ HDC dc = GetWindowDC(GetHwnd());
+ HFONT oldFont = 0;
+ if (GetFont().Ok() && GetFont().GetResourceHandle())
+ oldFont = (HFONT) ::SelectObject(dc, (HFONT) GetFont().GetResourceHandle());
+
+ GetTextMetrics(dc, &lpTextMetric);
+ SIZE extentXY;
+ ::GetTextExtentPoint(dc, (LPTSTR) (const wxChar *)s, s.Length(), &extentXY);
+ int extentX = (int)(extentXY.cx + lpTextMetric.tmAveCharWidth);
+
+ if (oldFont)
+ ::SelectObject(dc, oldFont);
+
+ ReleaseDC(GetHwnd(), dc);
+ if (extentX > existingExtent)
+ SendMessage(GetHwnd(), LB_SETHORIZONTALEXTENT, LOWORD(extentX), 0L);
+ }
+ else
+ {
+ int largestExtent = 0;
+ HDC dc = GetWindowDC(GetHwnd());
+ HFONT oldFont = 0;
+ if (GetFont().Ok() && GetFont().GetResourceHandle())
+ oldFont = (HFONT) ::SelectObject(dc, (HFONT) GetFont().GetResourceHandle());
+
+ GetTextMetrics(dc, &lpTextMetric);
+ int i;
+ for (i = 0; i < m_noItems; i++)
+ {
+ int len = (int)SendMessage(GetHwnd(), LB_GETTEXT, i, (LONG)wxBuffer);
+ wxBuffer[len] = 0;
+ SIZE extentXY;
+ ::GetTextExtentPoint(dc, (LPTSTR)wxBuffer, len, &extentXY);
+ int extentX = (int)(extentXY.cx + lpTextMetric.tmAveCharWidth);
+ if (extentX > largestExtent)
+ largestExtent = extentX;
+ }
+ if (oldFont)
+ ::SelectObject(dc, oldFont);
+
+ ReleaseDC(GetHwnd(), dc);
+ SendMessage(GetHwnd(), LB_SETHORIZONTALEXTENT, LOWORD(largestExtent), 0L);
+ }