simplified and cleaned up wxGTK's focus handling

[wxWidgets.git] / src / common / treebase.cpp

diff --git a/src/common/treebase.cpp b/src/common/treebase.cpp
index 08220fa5039f081efa02b59d24680e4669a3fb26..4bd01ace539a11f47635039602ed18495b2225c6 100644 (file)
--- a/src/common/treebase.cpp
+++ b/src/common/treebase.cpp
@@ -183,14 +183,20 @@ wxSize wxTreeCtrlBase::DoGetBestSize() const
 
 void wxTreeCtrlBase::ExpandAll()
 {
+    if ( IsEmpty() )
+        return;
+
     ExpandAllChildren(GetRootItem());
 }
 
 void wxTreeCtrlBase::ExpandAllChildren(const wxTreeItemId& item)
 {
+    Freeze();
     // expand this item first, this might result in its children being added on
     // the fly
-    Expand(item);
+    if ( item != GetRootItem() || !HasFlag(wxTR_HIDE_ROOT) )
+        Expand(item);
+    //else: expanding hidden root item is unsupported and unnecessary
 
     // then (recursively) expand all the children
     wxTreeItemIdValue cookie;
@@ -200,6 +206,37 @@ void wxTreeCtrlBase::ExpandAllChildren(const wxTreeItemId& item)
     {
         ExpandAllChildren(idCurr);
     }
+    Thaw();
+}
+
+void wxTreeCtrlBase::CollapseAll()
+{
+    if ( IsEmpty() )
+        return;
+
+    CollapseAllChildren(GetRootItem());
+}
+
+void wxTreeCtrlBase::CollapseAllChildren(const wxTreeItemId& item)
+{
+    Freeze();
+    // first (recursively) collapse all the children
+    wxTreeItemIdValue cookie;
+    for ( wxTreeItemId idCurr = GetFirstChild(item, cookie);
+          idCurr.IsOk();
+          idCurr = GetNextChild(item, cookie) )
+    {
+        CollapseAllChildren(idCurr);
+    }
+
+    // then collapse this element too
+    Collapse(item);
+    Thaw();
+}
+
+bool wxTreeCtrlBase::IsEmpty() const
+{
+    return !GetRootItem().IsOk();
 }
 
 #endif // wxUSE_TREECTRL