978f38c238
2. added more kbd logic to the generic tree ctrl (Home, End are now understood, Left does the same thing as under Windows and not the same thing as Up arrow) git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@1496 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
490 lines
20 KiB
C++
490 lines
20 KiB
C++
/////////////////////////////////////////////////////////////////////////////
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// Name: treectrl.h
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// Purpose: wxTreeCtrl class
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// Author: Robert Roebling
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// Modified by:
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// Created: 01/02/97
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// RCS-ID: $Id$
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// Copyright: (c) 1997,1998 Robert Roebling
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// Licence: wxWindows license
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/////////////////////////////////////////////////////////////////////////////
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#ifndef _GENERIC_TREECTRL_H_
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#define _GENERIC_TREECTRL_H_
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#ifdef __GNUG__
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#pragma interface "treectrl.h"
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#endif
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#ifdef __WXMSW__
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WXDLLEXPORT_DATA(extern const char*) wxTreeCtrlNameStr;
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#else
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#define wxTreeCtrlNameStr "wxTreeCtrl"
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#endif
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#include "wx/defs.h"
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#include "wx/string.h"
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#include "wx/object.h"
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#include "wx/event.h"
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#include "wx/scrolwin.h"
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#include "wx/textctrl.h"
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#include "wx/pen.h"
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// -----------------------------------------------------------------------------
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// constants
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// -----------------------------------------------------------------------------
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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_NOWHERE = 0x0004;
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// on the bitmap associated with an item.
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static const int wxTREE_HITTEST_ONITEMICON = 0x0020;
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// on the label (string) associated with an item.
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static const int wxTREE_HITTEST_ONITEMLABEL = 0x0080;
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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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// -----------------------------------------------------------------------------
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// forward declaration
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// -----------------------------------------------------------------------------
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class wxImageList;
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class wxGenericTreeItem;
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class wxTreeItemData;
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// -----------------------------------------------------------------------------
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// wxTreeItemId - unique identifier of a tree element
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// -----------------------------------------------------------------------------
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class WXDLLEXPORT wxTreeItemId
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{
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friend class wxTreeCtrl;
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friend class wxTreeEvent;
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public:
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// ctors
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// 0 is invalid value for HTREEITEM
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wxTreeItemId() { m_pItem = 0; }
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// default copy ctor/assignment operator are ok for us
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// accessors
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// is this a valid tree item?
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bool IsOk() const { return m_pItem != 0; }
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// deprecated: only for compatibility
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wxTreeItemId(long itemId) { m_pItem = (wxGenericTreeItem *)itemId; }
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operator long() const { return (long)m_pItem; }
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//protected: // not for gcc
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// for wxTreeCtrl usage only
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wxTreeItemId(wxGenericTreeItem *pItem) { m_pItem = pItem; }
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wxGenericTreeItem *m_pItem;
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};
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// ----------------------------------------------------------------------------
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// wxTreeItemData is some (arbitrary) user class associated with some item.
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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 WXDLLEXPORT wxTreeItemData: public wxClientData
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{
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friend class wxTreeCtrl;
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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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// -----------------------------------------------------------------------------
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// wxTreeEvent - the event generated by the tree control
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// -----------------------------------------------------------------------------
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class WXDLLEXPORT wxTreeEvent : public wxNotifyEvent
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{
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friend class wxTreeCtrl;
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public:
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wxTreeEvent(wxEventType commandType = wxEVT_NULL, int id = 0);
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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_COMMAND_TREE_SEL_CHANGED/ING events
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wxTreeItemId GetItem() const { return m_item; }
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// for wxEVT_COMMAND_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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// the point where the mouse was when the drag operation started (for
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// wxEVT_COMMAND_TREE_BEGIN_(R)DRAG events only)
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wxPoint GetPoint() const { return m_pointDrag; }
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// keyboard code (for wxEVT_COMMAND_TREE_KEY_DOWN only)
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int GetCode() const { return m_code; }
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// set return code for wxEVT_COMMAND_TREE_ITEM_{EXPAND|COLLAPS}ING events
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// call this to forbid the change in item status
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void Veto() { m_code = TRUE; }
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// for implementation usage only
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bool WasVetoed() const { return m_code; }
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private:
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// @@ we could save some space by using union here
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int m_code;
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wxTreeItemId m_item,
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m_itemOld;
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wxPoint m_pointDrag;
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DECLARE_DYNAMIC_CLASS(wxTreeEvent)
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};
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typedef void (wxEvtHandler::*wxTreeEventFunction)(wxTreeEvent&);
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// ----------------------------------------------------------------------------
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// macros for handling tree control events
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// ----------------------------------------------------------------------------
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// GetItem() returns the item being dragged, GetPoint() the mouse coords
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#define EVT_TREE_BEGIN_DRAG(id, fn) { wxEVT_COMMAND_TREE_BEGIN_DRAG, id, -1, (wxObjectEventFunction) (wxEventFunction) (wxTreeEventFunction) & fn, (wxObject *) NULL },
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#define EVT_TREE_BEGIN_RDRAG(id, fn) { wxEVT_COMMAND_TREE_BEGIN_RDRAG, id, -1, (wxObjectEventFunction) (wxEventFunction) (wxTreeEventFunction) & fn, (wxObject *) NULL },
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// GetItem() returns the itme whose label is being edited
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#define EVT_TREE_BEGIN_LABEL_EDIT(id, fn) { wxEVT_COMMAND_TREE_BEGIN_LABEL_EDIT, id, -1, (wxObjectEventFunction) (wxEventFunction) (wxTreeEventFunction) & fn, (wxObject *) NULL },
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#define EVT_TREE_END_LABEL_EDIT(id, fn) { wxEVT_COMMAND_TREE_END_LABEL_EDIT, id, -1, (wxObjectEventFunction) (wxEventFunction) (wxTreeEventFunction) & fn, (wxObject *) NULL },
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// provide/update information about GetItem() item
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#define EVT_TREE_GET_INFO(id, fn) { wxEVT_COMMAND_TREE_GET_INFO, id, -1, (wxObjectEventFunction) (wxEventFunction) (wxTreeEventFunction) & fn, (wxObject *) NULL },
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#define EVT_TREE_SET_INFO(id, fn) { wxEVT_COMMAND_TREE_SET_INFO, id, -1, (wxObjectEventFunction) (wxEventFunction) (wxTreeEventFunction) & fn, (wxObject *) NULL },
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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) { wxEVT_COMMAND_TREE_ITEM_EXPANDED, id, -1, (wxObjectEventFunction) (wxEventFunction) (wxTreeEventFunction) & fn, (wxObject *) NULL },
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#define EVT_TREE_ITEM_EXPANDING(id, fn) { wxEVT_COMMAND_TREE_ITEM_EXPANDING, id, -1, (wxObjectEventFunction) (wxEventFunction) (wxTreeEventFunction) & fn, (wxObject *) NULL },
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#define EVT_TREE_ITEM_COLLAPSED(id, fn) { wxEVT_COMMAND_TREE_ITEM_COLLAPSED, id, -1, (wxObjectEventFunction) (wxEventFunction) (wxTreeEventFunction) & fn, (wxObject *) NULL },
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#define EVT_TREE_ITEM_COLLAPSING(id, fn) { wxEVT_COMMAND_TREE_ITEM_COLLAPSING, id, -1, (wxObjectEventFunction) (wxEventFunction) (wxTreeEventFunction) & fn, NULL },
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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) { wxEVT_COMMAND_TREE_SEL_CHANGED, id, -1, (wxObjectEventFunction) (wxEventFunction) (wxTreeEventFunction) & fn, NULL },
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#define EVT_TREE_SEL_CHANGING(id, fn) { wxEVT_COMMAND_TREE_SEL_CHANGING, id, -1, (wxObjectEventFunction) (wxEventFunction) (wxTreeEventFunction) & fn, NULL },
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// GetCode() 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) { wxEVT_COMMAND_TREE_KEY_DOWN, id, -1, (wxObjectEventFunction) (wxEventFunction) (wxTreeEventFunction) & fn, NULL },
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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) { wxEVT_COMMAND_TREE_DELETE_ITEM, id, -1, (wxObjectEventFunction) (wxEventFunction) (wxTreeEventFunction) & fn, (wxObject *) NULL },
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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) { wxEVT_COMMAND_TREE_ITEM_ACTIVATED, id, -1, (wxObjectEventFunction) (wxEventFunction) (wxTreeEventFunction) & fn, NULL },
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// -----------------------------------------------------------------------------
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// wxTreeCtrl - the tree control
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// -----------------------------------------------------------------------------
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class WXDLLEXPORT wxTreeCtrl : public wxScrolledWindow
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{
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public:
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// creation
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// --------
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wxTreeCtrl() { Init(); }
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wxTreeCtrl(wxWindow *parent, wxWindowID id = -1,
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const wxPoint& pos = wxDefaultPosition,
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const wxSize& size = wxDefaultSize,
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long style = wxTR_HAS_BUTTONS | wxTR_LINES_AT_ROOT,
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const wxValidator &validator = wxDefaultValidator,
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const wxString& name = wxTreeCtrlNameStr)
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{
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Create(parent, id, pos, size, style, validator, name);
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}
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virtual ~wxTreeCtrl();
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bool Create(wxWindow *parent, wxWindowID id = -1,
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const wxPoint& pos = wxDefaultPosition,
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const wxSize& size = wxDefaultSize,
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long style = wxTR_HAS_BUTTONS | wxTR_LINES_AT_ROOT,
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const wxValidator &validator = wxDefaultValidator,
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const wxString& name = wxTreeCtrlNameStr);
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// accessors
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// ---------
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// get the total number of items in the control
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size_t GetCount() const;
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// indent is the number of pixels the children are indented relative to
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// the parents position. SetIndent() also redraws the control
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// immediately.
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unsigned int GetIndent() const { return m_indent; }
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void SetIndent(unsigned int indent);
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// image list: these functions allow to associate an image list with
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// the control and retrieve it. Note that the control does _not_ delete
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// the associated image list when it's deleted in order to allow image
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// lists to be shared between different controls.
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//
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// The normal image list is for the icons which correspond to the
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// normal tree item state (whether it is selected or not).
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// Additionally, the application might choose to show a state icon
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// which corresponds to an app-defined item state (for example,
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// checked/unchecked) which are taken from the state image list.
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wxImageList *GetImageList() const;
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wxImageList *GetStateImageList() const;
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void SetImageList(wxImageList *imageList);
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void SetStateImageList(wxImageList *imageList);
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// Functions to work with tree ctrl items.
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// accessors
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// ---------
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// retrieve items label
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wxString GetItemText(const wxTreeItemId& item) const;
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// get the normal item image
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int GetItemImage(const wxTreeItemId& item) const;
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// get the selected item image
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int GetItemSelectedImage(const wxTreeItemId& item) const;
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// get the data associated with the item
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wxTreeItemData *GetItemData(const wxTreeItemId& item) const;
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// modifiers
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// ---------
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// set items label
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void SetItemText(const wxTreeItemId& item, const wxString& text);
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// set the normal item image
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void SetItemImage(const wxTreeItemId& item, int image);
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// set the selected item image
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void SetItemSelectedImage(const wxTreeItemId& item, int image);
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// associate some data with the item
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void SetItemData(const wxTreeItemId& item, wxTreeItemData *data);
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// force appearance of [+] button near the item. This is useful to
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// allow the user to expand the items which don't have any children now
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// - but instead add them only when needed, thus minimizing memory
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// usage and loading time.
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void SetItemHasChildren(const wxTreeItemId& item, bool has = TRUE);
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// the item will be shown in bold
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void SetItemBold(const wxTreeItemId& item, bool bold = TRUE);
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// item status inquiries
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// ---------------------
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// is the item visible (it might be outside the view or not expanded)?
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bool IsVisible(const wxTreeItemId& item) const;
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// does the item has any children?
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bool HasChildren(const wxTreeItemId& item) const
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{ return ItemHasChildren(item); }
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bool ItemHasChildren(const wxTreeItemId& item) const;
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// is the item expanded (only makes sense if HasChildren())?
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bool IsExpanded(const wxTreeItemId& item) const;
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// is this item currently selected (the same as has focus)?
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bool IsSelected(const wxTreeItemId& item) const;
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// is item text in bold font?
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bool IsBold(const wxTreeItemId& item) const;
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// number of children
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// ------------------
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// if 'recursively' is FALSE, only immediate children count, otherwise
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// the returned number is the number of all items in this branch
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size_t GetChildrenCount(const wxTreeItemId& item, bool recursively = TRUE);
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// navigation
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// ----------
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// wxTreeItemId.IsOk() will return FALSE if there is no such item
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// get the root tree item
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wxTreeItemId GetRootItem() const { return m_anchor; }
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// get the item currently selected (may return NULL if no selection)
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wxTreeItemId GetSelection() const { return m_current; }
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// get the parent of this item (may return NULL if root)
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wxTreeItemId GetParent(const wxTreeItemId& item) const;
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// for this enumeration function you must pass in a "cookie" parameter
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// which is opaque for the application but is necessary for the library
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// to make these functions reentrant (i.e. allow more than one
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// enumeration on one and the same object simultaneously). Of course,
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// the "cookie" passed to GetFirstChild() and GetNextChild() should be
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// the same!
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// get the first child of this item
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wxTreeItemId GetFirstChild(const wxTreeItemId& item, long& cookie) const;
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// get the next child
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wxTreeItemId GetNextChild(const wxTreeItemId& item, long& cookie) const;
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// get the last child of this item - this method doesn't use cookies
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wxTreeItemId GetLastChild(const wxTreeItemId& item) const;
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// get the next sibling of this item
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wxTreeItemId GetNextSibling(const wxTreeItemId& item) const;
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// get the previous sibling
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wxTreeItemId GetPrevSibling(const wxTreeItemId& item) const;
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// get first visible item
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wxTreeItemId GetFirstVisibleItem() const;
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// get the next visible item: item must be visible itself!
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// see IsVisible() and wxTreeCtrl::GetFirstVisibleItem()
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wxTreeItemId GetNextVisible(const wxTreeItemId& item) const;
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// get the previous visible item: item must be visible itself!
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wxTreeItemId GetPrevVisible(const wxTreeItemId& item) const;
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// operations
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// ----------
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// add the root node to the tree
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wxTreeItemId AddRoot(const wxString& text,
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int image = -1, int selectedImage = -1,
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wxTreeItemData *data = NULL);
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// insert a new item in as the first child of the parent
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wxTreeItemId PrependItem(const wxTreeItemId& parent,
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const wxString& text,
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int image = -1, int selectedImage = -1,
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wxTreeItemData *data = NULL);
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// insert a new item after a given one
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wxTreeItemId InsertItem(const wxTreeItemId& parent,
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const wxTreeItemId& idPrevious,
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const wxString& text,
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int image = -1, int selectedImage = -1,
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wxTreeItemData *data = NULL);
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// insert a new item in as the last child of the parent
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wxTreeItemId AppendItem(const wxTreeItemId& parent,
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const wxString& text,
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int image = -1, int selectedImage = -1,
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wxTreeItemData *data = NULL);
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// delete this item and associated data if any
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void Delete(const wxTreeItemId& item);
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// delete all children (but don't delete the item itself)
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// NB: this won't send wxEVT_COMMAND_TREE_ITEM_DELETED events
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void DeleteChildren(const wxTreeItemId& item);
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// delete all items from the tree
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// NB: this won't send wxEVT_COMMAND_TREE_ITEM_DELETED events
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void DeleteAllItems();
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// expand this item
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void Expand(const wxTreeItemId& item);
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// collapse the item without removing its children
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void Collapse(const wxTreeItemId& item);
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// collapse the item and remove all children
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void CollapseAndReset(const wxTreeItemId& item);
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// toggles the current state
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void Toggle(const wxTreeItemId& item);
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// remove the selection from currently selected item (if any)
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void Unselect();
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// select this item
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void SelectItem(const wxTreeItemId& item);
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// make sure this item is visible (expanding the parent item and/or
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// scrolling to this item if necessary)
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void EnsureVisible(const wxTreeItemId& item);
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// scroll to this item (but don't expand its parent)
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void ScrollTo(const wxTreeItemId& item);
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// The first function is more portable (because easier to implement
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// on other platforms), but the second one returns some extra info.
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wxTreeItemId HitTest(const wxPoint& point)
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{ int dummy; return HitTest(point, dummy); }
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wxTreeItemId HitTest(const wxPoint& point, int& flags);
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// start editing the item label: this (temporarily) replaces the item
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// with a one line edit control. The item will be selected if it hadn't
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// been before. textCtrlClass parameter allows you to create an edit
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// control of arbitrary user-defined class deriving from wxTextCtrl.
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wxTextCtrl* EditLabel(const wxTreeItemId& item,
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wxClassInfo* textCtrlClass = CLASSINFO(wxTextCtrl));
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// returns the same pointer as StartEdit() if the item is being edited,
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// NULL otherwise (it's assumed that no more than one item may be
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// edited simultaneously)
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wxTextCtrl* GetEditControl() const;
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// end editing and accept or discard the changes to item label
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void EndEditLabel(const wxTreeItemId& item, bool discardChanges = FALSE);
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// sorting
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// this function is called to compare 2 items and should return -1, 0
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// or +1 if the first item is less than, equal to or greater than the
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// second one. The base class version performs alphabetic comparaison
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// of item labels (GetText)
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virtual int OnCompareItems(const wxTreeItemId& item1,
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const wxTreeItemId& item2);
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// sort the children of this item using OnCompareItems
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//
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// NB: this function is not reentrant and not MT-safe (FIXME)!
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void SortChildren(const wxTreeItemId& item);
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// callbacks
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void OnPaint( wxPaintEvent &event );
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void OnSetFocus( wxFocusEvent &event );
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void OnKillFocus( wxFocusEvent &event );
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void OnChar( wxKeyEvent &event );
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void OnMouse( wxMouseEvent &event );
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void OnIdle( wxIdleEvent &event );
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// implementation
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void SendDeleteEvent(wxGenericTreeItem *itemBeingDeleted);
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protected:
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wxGenericTreeItem *m_anchor;
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wxGenericTreeItem *m_current;
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bool m_hasFocus;
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bool m_dirty;
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int m_xScroll,m_yScroll;
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unsigned int m_indent;
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int m_lineHeight;
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wxPen m_dottedPen;
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wxBrush *m_hilightBrush;
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wxImageList *m_imageListNormal,
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*m_imageListState;
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int m_dragCount;
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// the common part of all ctors
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void Init();
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// misc helpers
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wxTreeItemId DoInsertItem(const wxTreeItemId& parent,
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size_t previous,
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const wxString& text,
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int image, int selectedImage,
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wxTreeItemData *data);
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void AdjustMyScrollbars();
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void PaintLevel( wxGenericTreeItem *item, wxDC& dc, int level, int &y );
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void PaintItem( wxGenericTreeItem *item, wxDC& dc);
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void CalculateLevel( wxGenericTreeItem *item, wxDC &dc, int level, int &y );
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void CalculatePositions();
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void RefreshSubtree( wxGenericTreeItem *item );
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void RefreshLine( wxGenericTreeItem *item );
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private:
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DECLARE_EVENT_TABLE()
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DECLARE_DYNAMIC_CLASS(wxTreeCtrl)
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};
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#endif // _GENERIC_TREECTRL_H_
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