Make wxMSW status bar slightly less tall by default.

The status bar in wxMSW applications was too big under Windows 7 because it
used EDIT_HEIGHT_FROM_CHAR_HEIGHT() to calculate the height which was simply
unwarranted here. Instead, make the status bar tall enough to accommodate
simple text contents by default and fix SetMinHeight() to actually work for
the cases when a taller toolbar is needed.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@69867 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/msw/statusbar.cpp

@@ -405,7 +405,18 @@ const wxStatusBar::MSWMetrics& wxStatusBar::MSWGetMetrics()
 
 void wxStatusBar::SetMinHeight(int height)
 {
-    SendMessage(GetHwnd(), SB_SETMINHEIGHT, height + 2*GetBorderY(), 0);
+    // It looks like we need to count the border twice to really make the
+    // controls taking exactly height pixels fully fit in the status bar:
+    // at least under Windows 7 the checkbox in the custom status bar of the
+    // statbar sample gets truncated otherwise.
+    height += 4*GetBorderY();
+
+    // We need to set the size and not the size to reflect the height because
+    // wxFrame uses our size and not the minimal size as it assumes that the
+    // size of a status bar never changes anyhow.
+    SetSize(-1, height);
+
+    SendMessage(GetHwnd(), SB_SETMINHEIGHT, height, 0);
 
     // we have to send a (dummy) WM_SIZE to redraw it now
     SendMessage(GetHwnd(), WM_SIZE, 0, 0);
@@ -475,11 +486,10 @@ wxSize wxStatusBar::DoGetBestSize() const
         width = 2*DEFAULT_FIELD_WIDTH;
     }
 
-    // calculate height
-    int height;
-    wxGetCharSize(GetHWND(), NULL, &height, GetFont());
-    height = EDIT_HEIGHT_FROM_CHAR_HEIGHT(height);
-    height += borders.vert;
+    // calculate height: by default it should be just big enough to show text
+    // (see SetMinHeight() for the explanation of 4 factor)
+    int height = GetCharHeight();
+    height += 4*borders.vert;
 
     wxSize best(width, height);
     CacheBestSize(best);