4832f7c06c
2. GetChildrenCount(bool recursive) added to all versions, implemented only in the generic one so far 3. Sample slightly modified to show new function git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@996 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
527 lines
23 KiB
C++
527 lines
23 KiB
C++
/////////////////////////////////////////////////////////////////////////////
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// Name: treectrl.h
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// Purpose: wxTreeCtrl class
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// Author: Julian Smart
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// Modified by: Vadim Zeitlin to be less MSW-specific on 10/10/98
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// Created: 01/02/97
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// RCS-ID: $Id$
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// Copyright: (c) Julian Smart and Markus Holzem
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// Licence: wxWindows license
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/////////////////////////////////////////////////////////////////////////////
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#ifndef _WX_TREECTRL_H_
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#define _WX_TREECTRL_H_
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// ----------------------------------------------------------------------------
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// headers
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// ----------------------------------------------------------------------------
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#ifdef __GNUG__
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#pragma interface "treectrl.h"
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#endif
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#include "wx/control.h"
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#include "wx/event.h"
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// the type for "untyped" data
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typedef long wxDataType;
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// fwd decl
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class WXDLLEXPORT wxImageList;
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struct WXDLLEXPORT wxTreeViewItem;
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// a callback function used for sorting tree items, it should return -1 if the
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// first item precedes the second, +1 if the second precedes the first or 0 if
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// they're equivalent
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class wxTreeItemData;
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typedef int (*wxTreeItemCmpFunc)(wxTreeItemData *item1, wxTreeItemData *item2);
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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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// above the client area.
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static const int wxTREE_HITTEST_ABOVE = 0x0001;
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// below the client area.
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static const int wxTREE_HITTEST_BELOW = 0x0002;
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// in the client area but below the last item.
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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 = 0x0010;
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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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// in the indentation associated with an item.
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static const int wxTREE_HITTEST_ONITEMINDENT = 0x0040;
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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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// in the area to the right of an item.
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static const int wxTREE_HITTEST_ONITEMRIGHT = 0x0100;
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// on the state icon for a tree view item that is in a user-defined state.
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static const int wxTREE_HITTEST_ONITEMSTATEICON = 0x0200;
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// to the right of the client area.
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static const int wxTREE_HITTEST_TOLEFT = 0x0400;
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// to the left of the client area.
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static const int wxTREE_HITTEST_TORIGHT = 0x0800;
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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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wxTREE_HITTEST_ONITEMSTATEICON;
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// NB: all the following flags are for compatbility only and will be removed in the
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// next versions
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// flags for deprecated `Expand(int action)'
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enum
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{
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wxTREE_EXPAND_EXPAND,
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wxTREE_EXPAND_COLLAPSE,
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wxTREE_EXPAND_COLLAPSE_RESET,
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wxTREE_EXPAND_TOGGLE
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};
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// flags for deprecated InsertItem() variant
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#define wxTREE_INSERT_FIRST 0xFFFF0001
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#define wxTREE_INSERT_LAST 0xFFFF0002
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// ----------------------------------------------------------------------------
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// wxTreeItemId identifies an element of the tree. In this implementation, it's
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// just a trivial wrapper around Win32 HTREEITEM. It's opaque for the
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// application.
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// ----------------------------------------------------------------------------
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class WXDLLEXPORT wxTreeItemId
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{
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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_itemId = 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_itemId != 0; }
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// conversion to/from either real (system-dependent) tree item id or
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// to "long" which used to be the type for tree item ids in previous
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// versions of wxWindows
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// for wxTreeCtrl usage only
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wxTreeItemId(WXHTREEITEM itemId) { m_itemId = (long)itemId; }
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operator WXHTREEITEM() const { return (WXHTREEITEM)m_itemId; }
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void operator =(WXHTREEITEM item) { m_itemId = (long) item; }
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// wxTreeItemId(long itemId) { m_itemId = itemId; }
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protected:
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long m_itemId;
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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 WXDLLEXPORT wxTreeItemData : private wxTreeItemId
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{
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public:
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// default ctor/copy ctor/assignment operator are ok
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// dtor is virtual and all the items are deleted by the tree control when
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// it's deleted, so you normally don't have to care about freeing memory
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// allocated in your wxTreeItemData-derived class
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virtual ~wxTreeItemData() { }
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// accessors: set/get the item associated with this node
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void SetId(const wxTreeItemId& id) { m_itemId = id; }
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const wxTreeItemId& GetId() const { return (wxTreeItemId&) m_itemId; }
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};
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// ----------------------------------------------------------------------------
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// wxTreeCtrl
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// ----------------------------------------------------------------------------
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class WXDLLEXPORT wxTreeCtrl : public wxControl
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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 = "wxTreeCtrl")
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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 = "wxTreeCtrl");
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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;
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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. Unfortunately, they can _not_ be
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// member functions of wxTreeItem because they must know the tree the item
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// belongs to for Windows implementation and storing the pointer to
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// wxTreeCtrl in each wxTreeItem is just too much waste.
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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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// 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 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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// 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;
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// get the item currently selected (may return NULL if no selection)
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wxTreeItemId GetSelection() const;
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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 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 items from the tree
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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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// 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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// sort the children of this item using the specified callback function
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// (it should return -1, 0 or +1 as usual), if it's not specified
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// alphabetical comparaison is performed.
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//
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// NB: this function is not reentrant!
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void SortChildren(const wxTreeItemId& item,
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wxTreeItemCmpFunc *cmpFunction = NULL);
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// helpers
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// -------
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// @@@ do we really need to expose these functions to the application?
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// get the bounding rectangle of the item (or of its label only)
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void GetBoundingRect(const wxTreeItemId& item,
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wxRectangle& rect,
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bool textOnly = FALSE) const;
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// determine to which item (if any) belongs the given point (the
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// coordinates specified are relative to the client area of tree ctrl)
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// and fill the flags parameter with a bitmask of wxTREE_HITTEST_xxx
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// constants
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wxTreeItemId HitTest(const wxPoint& point, int& flags);
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// deprecated
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// ----------
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// these methods are deprecated and will be removed in future versions of
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// wxWindows, they're here for compatibility only, don't use them in new
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// code (the comments indicate why these methods are now useless and how to
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// replace them)
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// use Expand, Collapse, CollapseAndReset or Toggle
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void ExpandItem(const wxTreeItemId& item, int action);
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// use AddRoot, PrependItem or AppendItem
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wxTreeItemId InsertItem(const wxTreeItemId& parent,
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const wxString& text,
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int image = -1, int selImage = -1,
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long insertAfter = wxTREE_INSERT_LAST);
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// use Set/GetImageList and Set/GetStateImageList
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wxImageList *GetImageList(int) const
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{ return GetImageList(); }
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void SetImageList(wxImageList *imageList, int)
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{ SetImageList(imageList); }
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// implementation
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// --------------
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void Command(wxCommandEvent& event) { ProcessCommand(event); };
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bool MSWCommand(WXUINT param, WXWORD id);
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bool MSWNotify(WXWPARAM wParam, WXLPARAM lParam);
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protected:
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// SetImageList helper
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void SetAnyImageList(wxImageList *imageList, int which);
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wxTextCtrl* m_textCtrl; // used while editing the item label
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wxImageList *m_imageListNormal, // images for tree elements
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*m_imageListState; // special images for app defined states
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private:
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// the common part of all ctors
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void Init();
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// helper functions
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inline bool DoGetItem(wxTreeViewItem *tvItem) const;
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inline void DoSetItem(wxTreeViewItem *tvItem);
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inline void DoExpand(const wxTreeItemId& item, int flag);
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wxTreeItemId DoInsertItem(const wxTreeItemId& parent,
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wxTreeItemId hInsertAfter,
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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 DeleteTextCtrl();
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DECLARE_DYNAMIC_CLASS(wxTreeCtrl)
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};
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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 WXDLLEXPORT wxTreeEvent : public wxCommandEvent
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{
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friend 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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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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#endif
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// _WX_TREECTRL_H_
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