Add a test for selecting the last item in the tree control sample.

This allows to test whether an item is brought into view by selecting it,
see #11154.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@64650 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

samples/treectrl/treetest.cpp

@@ -142,6 +142,7 @@ BEGIN_EVENT_TABLE(MyFrame, wxFrame)
     MENU_LINK(ShowPrevSibling)
     MENU_LINK(ShowNextSibling)
     MENU_LINK(ScrollTo)
+    MENU_LINK(SelectLast)
 #undef MENU_LINK
 
 END_EVENT_TABLE()
@@ -308,6 +309,8 @@ MyFrame::MyFrame(const wxString& title, int x, int y, int w, int h)
     item_menu->AppendSeparator();
     item_menu->Append(TreeTest_ScrollTo, "Scroll &to item",
                       "Scroll to the last by one top level child");
+    item_menu->Append(TreeTest_SelectLast, "Select &last item",
+                      "Select the last item");
 
 #ifndef NO_MULTIPLE_SELECTION
     item_menu->AppendSeparator();
@@ -878,6 +881,24 @@ void MyFrame::OnScrollTo(wxCommandEvent& WXUNUSED(event))
     m_treeCtrl->ScrollTo(item);
 }
 
+void MyFrame::OnSelectLast(wxCommandEvent& WXUNUSED(event))
+{
+    // select the very last item of the tree
+    wxTreeItemId item = m_treeCtrl->GetRootItem();
+    for ( ;; )
+    {
+        wxTreeItemId itemChild = m_treeCtrl->GetLastChild(item);
+        if ( !itemChild.IsOk() )
+            break;
+
+        item = itemChild;
+    }
+
+    CHECK_ITEM( item );
+
+    m_treeCtrl->SelectItem(item);
+}
+
 void MyFrame::OnSetFgColour(wxCommandEvent& WXUNUSED(event))
 {
     wxColour col = wxGetColourFromUser(this, m_treeCtrl->GetForegroundColour());

samples/treectrl/treetest.h

@@ -272,6 +272,7 @@ public:
         { DoShowRelativeItem(&wxTreeCtrl::GetNextSibling, "next sibling"); }
 
     void OnScrollTo(wxCommandEvent& event);
+    void OnSelectLast(wxCommandEvent& event);
 
     void OnIdle(wxIdleEvent& event);
     void OnSize(wxSizeEvent& event);
@@ -368,5 +369,6 @@ enum
     TreeTest_ShowPrevSibling,
     TreeTest_ShowNextSibling,
     TreeTest_ScrollTo,
+    TreeTest_SelectLast,
     TreeTest_Ctrl = 1000
 };