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
		
			
				
	
	
		
			491 lines
		
	
	
		
			21 KiB
		
	
	
	
		
			C++
		
	
	
	
	
	
			
		
		
	
	
			491 lines
		
	
	
		
			21 KiB
		
	
	
	
		
			C++
		
	
	
	
	
	
/////////////////////////////////////////////////////////////////////////////
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// Name:        treectrl.h
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// Purpose:     wxTreeCtrl class
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// Author:      Denis Pershin
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// Modified by:
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// Created:     08/08/98
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// RCS-ID:      $Id$
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// Copyright:   (c) Denis Pershin
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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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#ifdef __GNUG__
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#pragma interface "treectrl.h"
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#endif
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#include "wx/textctrl.h"
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#include "wx/control.h"
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#include "wx/event.h"
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#include "wx/imaglist.h"
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#include <gtk/gtk.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  wxImageList;
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struct 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
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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 GTK GtkTreeItem *. 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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public:
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  // ctors
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  wxTreeItemId() { m_itemId = NULL; }
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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 != NULL; }
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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(GtkTreeItem *itemId) { m_itemId = itemId; }
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  operator GtkTreeItem *() const { return m_itemId; }
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  void operator =(GtkTreeItem *item) { m_itemId = item; }
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protected:
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  GtkTreeItem *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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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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class WXDLLEXPORT wxTreeCtrl: public wxControl {
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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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      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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    // 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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    // 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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  void SendExpanding(const wxTreeItemId& item);
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  void SendExpanded(const wxTreeItemId& item);
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  void SendCollapsing(const wxTreeItemId& item);
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  void SendCollapsed(const wxTreeItemId& item);
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  void SendSelChanging(const wxTreeItemId& item);
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  void SendSelChanged(const wxTreeItemId& item);
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protected:
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  wxTreeItemId m_editItem;
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  GtkTree *m_tree;
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  GtkTreeItem *m_anchor;
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  wxTextCtrl*  m_textCtrl;
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  wxImageList* m_imageListNormal;
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  wxImageList* m_imageListState;
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  long m_curitemId;
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  void SendMessage(wxEventType command, const wxTreeItemId& item);
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//  GtkTreeItem *findGtkTreeItem(wxTreeCtrlId &id) const;
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    // the common part of all ctors
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  void Init();
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      // insert a new item in as the last child of the parent
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  wxTreeItemId p_InsertItem(GtkTreeItem *p,
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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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  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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