#ifndef __TREEHANDLER_H__
#define __TREEHANDLER_H__

#include <windows.h>

#include "atlbase.h"    // must be before atlapp.h
#include "atlapp.h"     // must be before atlctrls.h
#include "atlctrls.h"

#include "tvn_debug.h"

#include "treeitem.h"

#include "debug.h"

class TreeHandler {
public:
    virtual ~TreeHandler() { }
    LRESULT OnItemExpanding(WPARAM wParam, NMHDR *nm, BOOL& bHandled)
    {
        NMTREEVIEW *tv= (NMTREEVIEW *)nm;
        debug("expanding+(%08lx %08lx) %s  %08lx %08lx %s\n", wParam, nm, TvActionString(tv->action, TVN_ITEMEXPANDING).c_str(), 
                tv->itemNew.hItem, tv->itemNew.lParam, TvStateString(tv->itemNew.state, tv->itemNew.mask).c_str());

        if (tv->action==TVE_EXPAND) {
            TreeItem *item= (TreeItem*)tv->itemNew.lParam;
            if (item)
                item->populate();
        }
        bHandled= true;

        return 0;
    }
	LRESULT OnItemExpanded(WPARAM wParam, NMHDR *nm, BOOL& bHandled)
    {
        NMTREEVIEW *tv= (NMTREEVIEW *)nm;
        debug("expanded(%08lx %08lx) %s  %08lx %08lx %s\n", wParam, nm, TvActionString(tv->action, TVN_ITEMEXPANDED).c_str(), 
                tv->itemNew.hItem, tv->itemNew.lParam, TvStateString(tv->itemNew.state, tv->itemNew.mask).c_str());
        return 0;
    }
	LRESULT OnSelChanging(WPARAM wParam, NMHDR *nm, BOOL& bHandled)
    {
        NMTREEVIEW *tv= (NMTREEVIEW *)nm;
        debug("changing(%08lx %08lx) %s  %08lx %08lx %s -> %08lx %08lx %s\n", wParam, nm, TvActionString(tv->action, TVN_SELCHANGING).c_str(), 
                tv->itemOld.hItem, tv->itemOld.lParam, TvStateString(tv->itemOld.state, 0xfe).c_str(), 
                tv->itemNew.hItem, tv->itemNew.lParam, TvStateString(tv->itemNew.state, 0xfe).c_str());

        return 0;
    }
	LRESULT OnSelChanged(WPARAM wParam, NMHDR *nm, BOOL& bHandled)
    {
        NMTREEVIEW *tv= (NMTREEVIEW *)nm;
        debug("changed(%08lx %08lx) %s  %08lx %08lx %s -> %08lx %08lx %s\n", wParam, nm, TvActionString(tv->action, TVN_SELCHANGING).c_str(), 
                tv->itemOld.hItem, tv->itemOld.lParam, TvStateString(tv->itemOld.state, 0xfe).c_str(), 
                tv->itemNew.hItem, tv->itemNew.lParam, TvStateString(tv->itemNew.state, 0xfe).c_str());
        return 0;
    }
	LRESULT OnKeyDown(WPARAM wParam, NMHDR *nm, BOOL& bHandled)
    {
        NMTVKEYDOWN *tv= (NMTVKEYDOWN *)nm;
        debug("keydown(%08lx %08lx) %04x\n", wParam, nm, tv->wVKey);
		return 0;
    }
	LRESULT OnDeleteItem(WPARAM wParam, NMHDR *nm, BOOL& bHandled)
    {
        NMTREEVIEW *tv= (NMTREEVIEW *)nm;
        debug("deleteitem(%08lx %08lx) %08lx %08lx\n", wParam, nm, tv->itemOld.hItem, tv->itemOld.lParam);
        return 0;
    }

};

#endif