bfc6fde4b1
git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@1748 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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