Added wxRIBBON_PANEL_STRETCH to allow a single panel to stretch to fill the parent page.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@70852 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/ribbon/panel.h

@@ -23,6 +23,7 @@ enum wxRibbonPanelOption
     wxRIBBON_PANEL_NO_AUTO_MINIMISE = 1 << 0,
     wxRIBBON_PANEL_EXT_BUTTON       = 1 << 3,
     wxRIBBON_PANEL_MINIMISE_BUTTON  = 1 << 4,
+    wxRIBBON_PANEL_STRETCH          = 1 << 5,
 
     wxRIBBON_PANEL_DEFAULT_STYLE    = 0
 };

interface/wx/ribbon/panel.h

@@ -43,6 +43,8 @@
         typically combined with wxRIBBON_PANEL_NO_AUTO_MINIMISE to make a
         panel which the user always has manual control over when it
         minimises.
+    @style{wxRIBBON_PANEL_STRETCH}
+        Stretches a single panel to fit the parent page.
     @endStyleTable
 
     @library{wxribbon}

src/ribbon/panel.cpp

@@ -303,7 +303,12 @@ bool wxRibbonPanel::IsSizingContinuous() const
 {
     // A panel never sizes continuously, even if all of its children can,
     // as it would appear out of place along side non-continuous panels.
-    return false;
+
+    // JS 2012-03-09: introducing wxRIBBON_PANEL_STRETCH to allow
+    // the panel to fill its parent page. For example we might have
+    // a list of styles in one of the pages, which should stretch to
+    // fill available space.
+    return (m_flags & wxRIBBON_PANEL_STRETCH) != 0;
 }
 
 wxSize wxRibbonPanel::DoGetNextSmallerSize(wxOrientation direction,