Implement incremental search in wxGenericListCtrl.

Mostly copy wxGenericTreeCtrl incremental search implementation to
wxGenericListCtrl (unfortunately there is no simple way to reuse this code
currently), including the recently added EnableBellOnNoMatch() method.

Update the sample to test it, the key event handling in it had to be modified
to allow it.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@72639 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/generic/private/listctrl.h

@@ -390,6 +390,27 @@ public:
     void Notify();
 };
 
+//-----------------------------------------------------------------------------
+// wxListFindTimer (internal)
+//-----------------------------------------------------------------------------
+
+class wxListFindTimer: public wxTimer
+{
+public:
+    // reset the current prefix after half a second of inactivity
+    enum { DELAY = 500 };
+
+    wxListFindTimer( wxListMainWindow *owner )
+        : m_owner(owner)
+    {
+    }
+
+    virtual void Notify();
+
+private:
+    wxListMainWindow *m_owner;
+};
+
 //-----------------------------------------------------------------------------
 // wxListTextCtrlWrapper: wraps a wxTextCtrl to make it work for inline editing
 //-----------------------------------------------------------------------------
@@ -556,6 +577,11 @@ public:
     bool OnRenameAccept(size_t itemEdit, const wxString& value);
     void OnRenameCancelled(size_t itemEdit);
 
+    void OnFindTimer();
+    // set whether or not to ring the find bell
+    // (does nothing on MSW - bell is always rung)
+    void EnableBellOnNoMatch( bool on );
+
     void OnMouse( wxMouseEvent &event );
 
     // called to switch the selection from the current item to newCurrent,
@@ -729,6 +755,15 @@ protected:
 
     bool                 m_lastOnSame;
     wxTimer             *m_renameTimer;
+
+    // incremental search data
+    wxString             m_findPrefix;
+    wxTimer             *m_findTimer;
+    // This flag is set to 0 if the bell is disabled, 1 if it is enabled and -1
+    // if it is globally enabled but has been temporarily disabled because we
+    // had already beeped for this particular search.
+    int                  m_findBell;
+
     bool                 m_isCreated;
     int                  m_dragCount;
     wxPoint              m_dragStart;
@@ -779,6 +814,9 @@ protected:
     // force us to recalculate the range of visible lines
     void ResetVisibleLinesRange() { m_lineFrom = (size_t)-1; }
 
+    // find the first item starting with the given prefix after the given item
+    size_t PrefixFindItem(size_t item, const wxString& prefix) const;
+
     // get the colour to be used for drawing the rules
     wxColour GetRuleColour() const
     {