This is not very important because this function is only used by wxWidgets itself but it's still wrong to have a non-const trivial accessor like this. See #17661.
		
			
				
	
	
		
			370 lines
		
	
	
		
			17 KiB
		
	
	
	
		
			C++
		
	
	
	
	
	
			
		
		
	
	
			370 lines
		
	
	
		
			17 KiB
		
	
	
	
		
			C++
		
	
	
	
	
	
/////////////////////////////////////////////////////////////////////////////
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// Name:        wx/treebase.h
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// Purpose:     wxTreeCtrl base classes and types
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// Author:      Julian Smart et al
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// Modified by:
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// Created:     01/02/97
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// Copyright:   (c) 1997,1998 Robert Roebling
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// Licence:     wxWindows licence
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/////////////////////////////////////////////////////////////////////////////
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#ifndef _WX_TREEBASE_H_
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#define _WX_TREEBASE_H_
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// ----------------------------------------------------------------------------
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// headers
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// ----------------------------------------------------------------------------
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#include "wx/defs.h"
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#if wxUSE_TREECTRL
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#include "wx/window.h"  // for wxClientData
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#include "wx/event.h"
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#include "wx/dynarray.h"
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#include "wx/itemid.h"
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// ----------------------------------------------------------------------------
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// wxTreeItemId identifies an element of the tree. It's opaque for the
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// application and the only method which can be used by user code is IsOk().
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// ----------------------------------------------------------------------------
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// This is a class and not a typedef because existing code may forward declare
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// wxTreeItemId as a class and we don't want to break it without good reason.
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class wxTreeItemId : public wxItemId<void*>
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{
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public:
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    wxTreeItemId() : wxItemId<void*>() { }
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    wxTreeItemId(void* pItem) : wxItemId<void*>(pItem) { }
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};
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// ----------------------------------------------------------------------------
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// wxTreeItemData is some (arbitrary) user class associated with some item. The
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// main advantage of having this class (compared to old untyped interface) is
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// that wxTreeItemData's are destroyed automatically by the tree and, as this
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// class has virtual dtor, it means that the memory will be automatically
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// freed. OTOH, we don't just use wxObject instead of wxTreeItemData because
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// the size of this class is critical: in any real application, each tree leaf
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// will have wxTreeItemData associated with it and number of leaves may be
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// quite big.
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//
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// Because the objects of this class are deleted by the tree, they should
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// always be allocated on the heap!
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// ----------------------------------------------------------------------------
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class WXDLLIMPEXP_CORE wxTreeItemData: public wxClientData
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{
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friend class WXDLLIMPEXP_FWD_CORE wxTreeCtrl;
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friend class WXDLLIMPEXP_FWD_CORE wxGenericTreeCtrl;
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public:
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    // creation/destruction
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    // --------------------
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        // default ctor
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    wxTreeItemData() { }
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        // default copy ctor/assignment operator are ok
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    // accessor: get the item associated with us
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    const wxTreeItemId& GetId() const { return m_pItem; }
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    void SetId(const wxTreeItemId& id) { m_pItem = id; }
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protected:
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    wxTreeItemId m_pItem;
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};
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typedef void *wxTreeItemIdValue;
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WX_DEFINE_EXPORTED_ARRAY_PTR(wxTreeItemIdValue, wxArrayTreeItemIdsBase);
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// this is a wrapper around the array class defined above which allow to wok
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// with values of natural wxTreeItemId type instead of using wxTreeItemIdValue
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// and does it without any loss of efficiency
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class WXDLLIMPEXP_CORE wxArrayTreeItemIds : public wxArrayTreeItemIdsBase
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{
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public:
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    void Add(const wxTreeItemId& id)
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        { wxArrayTreeItemIdsBase::Add(id.m_pItem); }
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    void Insert(const wxTreeItemId& id, size_t pos)
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        { wxArrayTreeItemIdsBase::Insert(id.m_pItem, pos); }
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    wxTreeItemId Item(size_t i) const
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        { return wxTreeItemId(wxArrayTreeItemIdsBase::Item(i)); }
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    wxTreeItemId operator[](size_t i) const { return Item(i); }
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};
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// ----------------------------------------------------------------------------
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// constants
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// ----------------------------------------------------------------------------
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// enum for different images associated with a treectrl item
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enum wxTreeItemIcon
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{
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    wxTreeItemIcon_Normal,              // not selected, not expanded
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    wxTreeItemIcon_Selected,            //     selected, not expanded
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    wxTreeItemIcon_Expanded,            // not selected,     expanded
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    wxTreeItemIcon_SelectedExpanded,    //     selected,     expanded
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    wxTreeItemIcon_Max
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};
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// special values for the 'state' parameter of wxTreeCtrl::SetItemState()
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static const int wxTREE_ITEMSTATE_NONE  = -1;   // not state (no display state image)
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static const int wxTREE_ITEMSTATE_NEXT  = -2;   // cycle to the next state
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static const int wxTREE_ITEMSTATE_PREV  = -3;   // cycle to the previous state
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// ----------------------------------------------------------------------------
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// wxTreeCtrl flags
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// ----------------------------------------------------------------------------
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#define wxTR_NO_BUTTONS              0x0000     // for convenience
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#define wxTR_HAS_BUTTONS             0x0001     // draw collapsed/expanded btns
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#define wxTR_NO_LINES                0x0004     // don't draw lines at all
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#define wxTR_LINES_AT_ROOT           0x0008     // connect top-level nodes
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#define wxTR_TWIST_BUTTONS           0x0010     // still used by wxTreeListCtrl
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#define wxTR_SINGLE                  0x0000     // for convenience
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#define wxTR_MULTIPLE                0x0020     // can select multiple items
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#if WXWIN_COMPATIBILITY_2_8
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    #define wxTR_EXTENDED            0x0040     // deprecated, don't use
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#endif // WXWIN_COMPATIBILITY_2_8
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#define wxTR_HAS_VARIABLE_ROW_HEIGHT 0x0080     // what it says
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#define wxTR_EDIT_LABELS             0x0200     // can edit item labels
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#define wxTR_ROW_LINES               0x0400     // put border around items
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#define wxTR_HIDE_ROOT               0x0800     // don't display root node
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#define wxTR_FULL_ROW_HIGHLIGHT      0x2000     // highlight full horz space
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// make the default control appearance look more native-like depending on the
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// platform
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#if defined(__WXGTK20__)
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    #define wxTR_DEFAULT_STYLE       (wxTR_HAS_BUTTONS | wxTR_NO_LINES)
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#elif defined(__WXMAC__)
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    #define wxTR_DEFAULT_STYLE \
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        (wxTR_HAS_BUTTONS | wxTR_NO_LINES | wxTR_FULL_ROW_HIGHLIGHT)
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#else
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    #define wxTR_DEFAULT_STYLE       (wxTR_HAS_BUTTONS | wxTR_LINES_AT_ROOT)
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#endif
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// values for the `flags' parameter of wxTreeCtrl::HitTest() which determine
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// where exactly the specified point is situated:
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static const int wxTREE_HITTEST_ABOVE            = 0x0001;
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static const int wxTREE_HITTEST_BELOW            = 0x0002;
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static const int wxTREE_HITTEST_NOWHERE          = 0x0004;
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    // on the button associated with an item.
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static const int wxTREE_HITTEST_ONITEMBUTTON     = 0x0008;
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    // on the bitmap associated with an item.
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static const int wxTREE_HITTEST_ONITEMICON       = 0x0010;
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    // on the indent associated with an item.
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static const int wxTREE_HITTEST_ONITEMINDENT     = 0x0020;
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    // on the label (string) associated with an item.
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static const int wxTREE_HITTEST_ONITEMLABEL      = 0x0040;
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    // on the right of the label associated with an item.
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static const int wxTREE_HITTEST_ONITEMRIGHT      = 0x0080;
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    // on the label (string) associated with an item.
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static const int wxTREE_HITTEST_ONITEMSTATEICON  = 0x0100;
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    // on the left of the wxTreeCtrl.
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static const int wxTREE_HITTEST_TOLEFT           = 0x0200;
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    // on the right of the wxTreeCtrl.
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static const int wxTREE_HITTEST_TORIGHT          = 0x0400;
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    // on the upper part (first half) of the item.
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static const int wxTREE_HITTEST_ONITEMUPPERPART  = 0x0800;
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    // on the lower part (second half) of the item.
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static const int wxTREE_HITTEST_ONITEMLOWERPART  = 0x1000;
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    // anywhere on the item
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static const int wxTREE_HITTEST_ONITEM  = wxTREE_HITTEST_ONITEMICON |
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                                          wxTREE_HITTEST_ONITEMLABEL;
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// tree ctrl default name
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extern WXDLLIMPEXP_DATA_CORE(const char) wxTreeCtrlNameStr[];
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// ----------------------------------------------------------------------------
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// wxTreeEvent is a special class for all events associated with tree controls
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//
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// NB: note that not all accessors make sense for all events, see the event
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//     descriptions below
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// ----------------------------------------------------------------------------
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class WXDLLIMPEXP_FWD_CORE wxTreeCtrlBase;
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class WXDLLIMPEXP_CORE wxTreeEvent : public wxNotifyEvent
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{
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public:
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    wxTreeEvent(wxEventType commandType = wxEVT_NULL, int id = 0);
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    wxTreeEvent(wxEventType commandType,
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                wxTreeCtrlBase *tree,
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                const wxTreeItemId &item = wxTreeItemId());
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    wxTreeEvent(const wxTreeEvent& event);
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    virtual wxEvent *Clone() const wxOVERRIDE { return new wxTreeEvent(*this); }
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    // accessors
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        // get the item on which the operation was performed or the newly
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        // selected item for wxEVT_TREE_SEL_CHANGED/ING events
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    wxTreeItemId GetItem() const { return m_item; }
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    void SetItem(const wxTreeItemId& item) { m_item = item; }
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        // for wxEVT_TREE_SEL_CHANGED/ING events, get the previously
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        // selected item
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    wxTreeItemId GetOldItem() const { return m_itemOld; }
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    void SetOldItem(const wxTreeItemId& item) { m_itemOld = item; }
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        // the point where the mouse was when the drag operation started (for
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        // wxEVT_TREE_BEGIN_(R)DRAG events only) or click position
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    wxPoint GetPoint() const { return m_pointDrag; }
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    void SetPoint(const wxPoint& pt) { m_pointDrag = pt; }
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        // keyboard data (for wxEVT_TREE_KEY_DOWN only)
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    const wxKeyEvent& GetKeyEvent() const { return m_evtKey; }
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    int GetKeyCode() const { return m_evtKey.GetKeyCode(); }
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    void SetKeyEvent(const wxKeyEvent& evt) { m_evtKey = evt; }
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        // label (for EVT_TREE_{BEGIN|END}_LABEL_EDIT only)
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    const wxString& GetLabel() const { return m_label; }
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    void SetLabel(const wxString& label) { m_label = label; }
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        // edit cancel flag (for EVT_TREE_{BEGIN|END}_LABEL_EDIT only)
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    bool IsEditCancelled() const { return m_editCancelled; }
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    void SetEditCanceled(bool editCancelled) { m_editCancelled = editCancelled; }
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        // Set the tooltip for the item (for EVT_TREE_ITEM_GETTOOLTIP events)
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    void SetToolTip(const wxString& toolTip) { m_label = toolTip; }
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    wxString GetToolTip() const { return m_label; }
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private:
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    // not all of the members are used (or initialized) for all events
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    wxKeyEvent    m_evtKey;
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    wxTreeItemId  m_item,
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                  m_itemOld;
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    wxPoint       m_pointDrag;
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    wxString      m_label;
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    bool          m_editCancelled;
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    friend class WXDLLIMPEXP_FWD_CORE wxTreeCtrl;
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    friend class WXDLLIMPEXP_FWD_CORE wxGenericTreeCtrl;
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    wxDECLARE_DYNAMIC_CLASS(wxTreeEvent);
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};
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typedef void (wxEvtHandler::*wxTreeEventFunction)(wxTreeEvent&);
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// ----------------------------------------------------------------------------
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// tree control events and macros for handling them
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// ----------------------------------------------------------------------------
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wxDECLARE_EXPORTED_EVENT( WXDLLIMPEXP_CORE, wxEVT_TREE_BEGIN_DRAG, wxTreeEvent );
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wxDECLARE_EXPORTED_EVENT( WXDLLIMPEXP_CORE, wxEVT_TREE_BEGIN_RDRAG, wxTreeEvent );
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wxDECLARE_EXPORTED_EVENT( WXDLLIMPEXP_CORE, wxEVT_TREE_BEGIN_LABEL_EDIT, wxTreeEvent );
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wxDECLARE_EXPORTED_EVENT( WXDLLIMPEXP_CORE, wxEVT_TREE_END_LABEL_EDIT, wxTreeEvent );
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wxDECLARE_EXPORTED_EVENT( WXDLLIMPEXP_CORE, wxEVT_TREE_DELETE_ITEM, wxTreeEvent );
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wxDECLARE_EXPORTED_EVENT( WXDLLIMPEXP_CORE, wxEVT_TREE_GET_INFO, wxTreeEvent );
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wxDECLARE_EXPORTED_EVENT( WXDLLIMPEXP_CORE, wxEVT_TREE_SET_INFO, wxTreeEvent );
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wxDECLARE_EXPORTED_EVENT( WXDLLIMPEXP_CORE, wxEVT_TREE_ITEM_EXPANDED, wxTreeEvent );
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wxDECLARE_EXPORTED_EVENT( WXDLLIMPEXP_CORE, wxEVT_TREE_ITEM_EXPANDING, wxTreeEvent );
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wxDECLARE_EXPORTED_EVENT( WXDLLIMPEXP_CORE, wxEVT_TREE_ITEM_COLLAPSED, wxTreeEvent );
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wxDECLARE_EXPORTED_EVENT( WXDLLIMPEXP_CORE, wxEVT_TREE_ITEM_COLLAPSING, wxTreeEvent );
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wxDECLARE_EXPORTED_EVENT( WXDLLIMPEXP_CORE, wxEVT_TREE_SEL_CHANGED, wxTreeEvent );
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wxDECLARE_EXPORTED_EVENT( WXDLLIMPEXP_CORE, wxEVT_TREE_SEL_CHANGING, wxTreeEvent );
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wxDECLARE_EXPORTED_EVENT( WXDLLIMPEXP_CORE, wxEVT_TREE_KEY_DOWN, wxTreeEvent );
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wxDECLARE_EXPORTED_EVENT( WXDLLIMPEXP_CORE, wxEVT_TREE_ITEM_ACTIVATED, wxTreeEvent );
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wxDECLARE_EXPORTED_EVENT( WXDLLIMPEXP_CORE, wxEVT_TREE_ITEM_RIGHT_CLICK, wxTreeEvent );
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wxDECLARE_EXPORTED_EVENT( WXDLLIMPEXP_CORE, wxEVT_TREE_ITEM_MIDDLE_CLICK, wxTreeEvent );
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wxDECLARE_EXPORTED_EVENT( WXDLLIMPEXP_CORE, wxEVT_TREE_END_DRAG, wxTreeEvent );
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wxDECLARE_EXPORTED_EVENT( WXDLLIMPEXP_CORE, wxEVT_TREE_STATE_IMAGE_CLICK, wxTreeEvent );
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wxDECLARE_EXPORTED_EVENT( WXDLLIMPEXP_CORE, wxEVT_TREE_ITEM_GETTOOLTIP, wxTreeEvent );
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wxDECLARE_EXPORTED_EVENT( WXDLLIMPEXP_CORE, wxEVT_TREE_ITEM_MENU, wxTreeEvent );
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#define wxTreeEventHandler(func) \
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    wxEVENT_HANDLER_CAST(wxTreeEventFunction, func)
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#define wx__DECLARE_TREEEVT(evt, id, fn) \
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    wx__DECLARE_EVT1(wxEVT_TREE_ ## evt, id, wxTreeEventHandler(fn))
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// GetItem() returns the item being dragged, GetPoint() the mouse coords
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//
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// if you call event.Allow(), the drag operation will start and a
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// EVT_TREE_END_DRAG event will be sent when the drag is over.
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#define EVT_TREE_BEGIN_DRAG(id, fn) wx__DECLARE_TREEEVT(BEGIN_DRAG, id, fn)
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#define EVT_TREE_BEGIN_RDRAG(id, fn) wx__DECLARE_TREEEVT(BEGIN_RDRAG, id, fn)
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// GetItem() is the item on which the drop occurred (if any) and GetPoint() the
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// current mouse coords
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#define EVT_TREE_END_DRAG(id, fn) wx__DECLARE_TREEEVT(END_DRAG, id, fn)
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// GetItem() returns the itme whose label is being edited, GetLabel() returns
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// the current item label for BEGIN and the would be new one for END.
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//
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// Vetoing BEGIN event means that label editing won't happen at all,
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// vetoing END means that the new value is discarded and the old one kept
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#define EVT_TREE_BEGIN_LABEL_EDIT(id, fn) wx__DECLARE_TREEEVT(BEGIN_LABEL_EDIT, id, fn)
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#define EVT_TREE_END_LABEL_EDIT(id, fn) wx__DECLARE_TREEEVT(END_LABEL_EDIT, id, fn)
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// provide/update information about GetItem() item
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#define EVT_TREE_GET_INFO(id, fn) wx__DECLARE_TREEEVT(GET_INFO, id, fn)
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#define EVT_TREE_SET_INFO(id, fn) wx__DECLARE_TREEEVT(SET_INFO, id, fn)
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// GetItem() is the item being expanded/collapsed, the "ING" versions can use
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#define EVT_TREE_ITEM_EXPANDED(id, fn) wx__DECLARE_TREEEVT(ITEM_EXPANDED, id, fn)
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#define EVT_TREE_ITEM_EXPANDING(id, fn) wx__DECLARE_TREEEVT(ITEM_EXPANDING, id, fn)
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#define EVT_TREE_ITEM_COLLAPSED(id, fn) wx__DECLARE_TREEEVT(ITEM_COLLAPSED, id, fn)
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#define EVT_TREE_ITEM_COLLAPSING(id, fn) wx__DECLARE_TREEEVT(ITEM_COLLAPSING, id, fn)
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// GetOldItem() is the item which had the selection previously, GetItem() is
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// the item which acquires selection
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#define EVT_TREE_SEL_CHANGED(id, fn) wx__DECLARE_TREEEVT(SEL_CHANGED, id, fn)
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#define EVT_TREE_SEL_CHANGING(id, fn) wx__DECLARE_TREEEVT(SEL_CHANGING, id, fn)
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// GetKeyCode() returns the key code
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// NB: this is the only message for which GetItem() is invalid (you may get the
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//     item from GetSelection())
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#define EVT_TREE_KEY_DOWN(id, fn) wx__DECLARE_TREEEVT(KEY_DOWN, id, fn)
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// GetItem() returns the item being deleted, the associated data (if any) will
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// be deleted just after the return of this event handler (if any)
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#define EVT_TREE_DELETE_ITEM(id, fn) wx__DECLARE_TREEEVT(DELETE_ITEM, id, fn)
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// GetItem() returns the item that was activated (double click, enter, space)
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#define EVT_TREE_ITEM_ACTIVATED(id, fn) wx__DECLARE_TREEEVT(ITEM_ACTIVATED, id, fn)
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// GetItem() returns the item for which the context menu shall be shown
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#define EVT_TREE_ITEM_MENU(id, fn) wx__DECLARE_TREEEVT(ITEM_MENU, id, fn)
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// GetItem() returns the item that was clicked on
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#define EVT_TREE_ITEM_RIGHT_CLICK(id, fn) wx__DECLARE_TREEEVT(ITEM_RIGHT_CLICK, id, fn)
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#define EVT_TREE_ITEM_MIDDLE_CLICK(id, fn) wx__DECLARE_TREEEVT(ITEM_MIDDLE_CLICK, id, fn)
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// GetItem() returns the item whose state image was clicked on
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#define EVT_TREE_STATE_IMAGE_CLICK(id, fn) wx__DECLARE_TREEEVT(STATE_IMAGE_CLICK, id, fn)
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// GetItem() is the item for which the tooltip is being requested
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#define EVT_TREE_ITEM_GETTOOLTIP(id, fn) wx__DECLARE_TREEEVT(ITEM_GETTOOLTIP, id, fn)
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// old wxEVT_COMMAND_* constants
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#define wxEVT_COMMAND_TREE_BEGIN_DRAG          wxEVT_TREE_BEGIN_DRAG
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#define wxEVT_COMMAND_TREE_BEGIN_RDRAG         wxEVT_TREE_BEGIN_RDRAG
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#define wxEVT_COMMAND_TREE_BEGIN_LABEL_EDIT    wxEVT_TREE_BEGIN_LABEL_EDIT
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#define wxEVT_COMMAND_TREE_END_LABEL_EDIT      wxEVT_TREE_END_LABEL_EDIT
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#define wxEVT_COMMAND_TREE_DELETE_ITEM         wxEVT_TREE_DELETE_ITEM
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#define wxEVT_COMMAND_TREE_GET_INFO            wxEVT_TREE_GET_INFO
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#define wxEVT_COMMAND_TREE_SET_INFO            wxEVT_TREE_SET_INFO
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#define wxEVT_COMMAND_TREE_ITEM_EXPANDED       wxEVT_TREE_ITEM_EXPANDED
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#define wxEVT_COMMAND_TREE_ITEM_EXPANDING      wxEVT_TREE_ITEM_EXPANDING
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#define wxEVT_COMMAND_TREE_ITEM_COLLAPSED      wxEVT_TREE_ITEM_COLLAPSED
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#define wxEVT_COMMAND_TREE_ITEM_COLLAPSING     wxEVT_TREE_ITEM_COLLAPSING
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#define wxEVT_COMMAND_TREE_SEL_CHANGED         wxEVT_TREE_SEL_CHANGED
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#define wxEVT_COMMAND_TREE_SEL_CHANGING        wxEVT_TREE_SEL_CHANGING
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#define wxEVT_COMMAND_TREE_KEY_DOWN            wxEVT_TREE_KEY_DOWN
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#define wxEVT_COMMAND_TREE_ITEM_ACTIVATED      wxEVT_TREE_ITEM_ACTIVATED
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#define wxEVT_COMMAND_TREE_ITEM_RIGHT_CLICK    wxEVT_TREE_ITEM_RIGHT_CLICK
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#define wxEVT_COMMAND_TREE_ITEM_MIDDLE_CLICK   wxEVT_TREE_ITEM_MIDDLE_CLICK
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#define wxEVT_COMMAND_TREE_END_DRAG            wxEVT_TREE_END_DRAG
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#define wxEVT_COMMAND_TREE_STATE_IMAGE_CLICK   wxEVT_TREE_STATE_IMAGE_CLICK
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#define wxEVT_COMMAND_TREE_ITEM_GETTOOLTIP     wxEVT_TREE_ITEM_GETTOOLTIP
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#define wxEVT_COMMAND_TREE_ITEM_MENU           wxEVT_TREE_ITEM_MENU
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#endif // wxUSE_TREECTRL
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#endif // _WX_TREEBASE_H_
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