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wxWidgets/include/wx/msw/treectrl.h
Julian Smart 58a8ab8868 Added wxTreeCtrl::SetItemDropHighlight (wxMSW only); 
added WS_CLIPCHILDREN style to wxNotebook.


git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@1947 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
1999-03-21 22:39:45 +00:00

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/////////////////////////////////////////////////////////////////////////////
// Name: treectrl.h
// Purpose: wxTreeCtrl class
// Author: Julian Smart
// Modified by: Vadim Zeitlin to be less MSW-specific on 10/10/98
// Created: 01/02/97
// RCS-ID: $Id$
// Copyright: (c) Julian Smart and Markus Holzem
// Licence: wxWindows license
/////////////////////////////////////////////////////////////////////////////
#ifndef _WX_TREECTRL_H_
#define _WX_TREECTRL_H_
// ----------------------------------------------------------------------------
// headers
// ----------------------------------------------------------------------------
#ifdef __GNUG__
#pragma interface "treectrl.h"
#endif
#include "wx/control.h"
#include "wx/event.h"
#include "wx/textctrl.h"
#ifdef __GNUWIN32__
# ifdef GetFirstChild
# undef GetFirstChild
# endif
# ifdef GetNextSibling
# undef GetNextSibling
# endif
#endif
// the type for "untyped" data
typedef long wxDataType;
// fwd decl
class WXDLLEXPORT wxImageList;
struct WXDLLEXPORT wxTreeViewItem;
// a callback function used for sorting tree items, it should return -1 if the
// first item precedes the second, +1 if the second precedes the first or 0 if
// they're equivalent
class wxTreeItemData;
// ----------------------------------------------------------------------------
// constants
// ----------------------------------------------------------------------------
// values for the `flags' parameter of wxTreeCtrl::HitTest() which determine
// where exactly the specified point is situated:
// above the client area.
static const int wxTREE_HITTEST_ABOVE = 0x0001;
// below the client area.
static const int wxTREE_HITTEST_BELOW = 0x0002;
// in the client area but below the last item.
static const int wxTREE_HITTEST_NOWHERE = 0x0004;
// on the button associated with an item.
static const int wxTREE_HITTEST_ONITEMBUTTON = 0x0010;
// on the bitmap associated with an item.
static const int wxTREE_HITTEST_ONITEMICON = 0x0020;
// in the indentation associated with an item.
static const int wxTREE_HITTEST_ONITEMINDENT = 0x0040;
// on the label (string) associated with an item.
static const int wxTREE_HITTEST_ONITEMLABEL = 0x0080;
// in the area to the right of an item.
static const int wxTREE_HITTEST_ONITEMRIGHT = 0x0100;
// on the state icon for a tree view item that is in a user-defined state.
static const int wxTREE_HITTEST_ONITEMSTATEICON = 0x0200;
// to the right of the client area.
static const int wxTREE_HITTEST_TOLEFT = 0x0400;
// to the left of the client area.
static const int wxTREE_HITTEST_TORIGHT = 0x0800;
// anywhere on the item
static const int wxTREE_HITTEST_ONITEM = wxTREE_HITTEST_ONITEMICON |
wxTREE_HITTEST_ONITEMLABEL |
wxTREE_HITTEST_ONITEMSTATEICON;
// NB: all the following flags are for compatbility only and will be removed in the
// next versions
// flags for deprecated `Expand(int action)'
enum
{
wxTREE_EXPAND_EXPAND,
wxTREE_EXPAND_COLLAPSE,
wxTREE_EXPAND_COLLAPSE_RESET,
wxTREE_EXPAND_TOGGLE
};
// flags for deprecated InsertItem() variant
#define wxTREE_INSERT_FIRST 0xFFFF0001
#define wxTREE_INSERT_LAST 0xFFFF0002
// ----------------------------------------------------------------------------
// wxTreeItemId identifies an element of the tree. In this implementation, it's
// just a trivial wrapper around Win32 HTREEITEM. It's opaque for the
// application.
// ----------------------------------------------------------------------------
class WXDLLEXPORT wxTreeItemId
{
public:
// ctors
// 0 is invalid value for HTREEITEM
wxTreeItemId() { m_itemId = 0; }
// default copy ctor/assignment operator are ok for us
// accessors
// is this a valid tree item?
bool IsOk() const { return m_itemId != 0; }
// conversion to/from either real (system-dependent) tree item id or
// to "long" which used to be the type for tree item ids in previous
// versions of wxWindows
// for wxTreeCtrl usage only
wxTreeItemId(WXHTREEITEM itemId) { m_itemId = (long)itemId; }
operator WXHTREEITEM() const { return (WXHTREEITEM)m_itemId; }
void operator=(WXHTREEITEM item) { m_itemId = (long) item; }
protected:
long m_itemId;
};
// ----------------------------------------------------------------------------
// wxTreeItemData is some (arbitrary) user class associated with some item. The
// main advantage of having this class (compared to old untyped interface) is
// that wxTreeItemData's are destroyed automatically by the tree and, as this
// class has virtual dtor, it means that the memory will be automatically
// freed. OTOH, we don't just use wxObject instead of wxTreeItemData because
// the size of this class is critical: in any real application, each tree leaf
// will have wxTreeItemData associated with it and number of leaves may be
// quite big.
//
// Because the objects of this class are deleted by the tree, they should
// always be allocated on the heap!
// ----------------------------------------------------------------------------
class WXDLLEXPORT wxTreeItemData : private wxTreeItemId
{
public:
// default ctor/copy ctor/assignment operator are ok
// dtor is virtual and all the items are deleted by the tree control when
// it's deleted, so you normally don't have to care about freeing memory
// allocated in your wxTreeItemData-derived class
virtual ~wxTreeItemData() { }
// accessors: set/get the item associated with this node
void SetId(const wxTreeItemId& id) { m_itemId = id; }
#ifdef __WATCOMC__
const wxTreeItemId GetId() const { return m_itemId; }
#else
const wxTreeItemId& GetId() const { return (wxTreeItemId&) m_itemId; }
#endif
};
// ----------------------------------------------------------------------------
// wxTreeCtrl
// ----------------------------------------------------------------------------
class WXDLLEXPORT wxTreeCtrl : public wxControl
{
public:
// creation
// --------
wxTreeCtrl() { Init(); }
wxTreeCtrl(wxWindow *parent, wxWindowID id = -1,
const wxPoint& pos = wxDefaultPosition,
const wxSize& size = wxDefaultSize,
long style = wxTR_HAS_BUTTONS | wxTR_LINES_AT_ROOT,
const wxValidator& validator = wxDefaultValidator,
const wxString& name = "wxTreeCtrl")
{
Create(parent, id, pos, size, style, validator, name);
}
virtual ~wxTreeCtrl();
bool Create(wxWindow *parent, wxWindowID id = -1,
const wxPoint& pos = wxDefaultPosition,
const wxSize& size = wxDefaultSize,
long style = wxTR_HAS_BUTTONS | wxTR_LINES_AT_ROOT,
const wxValidator& validator = wxDefaultValidator,
const wxString& name = "wxTreeCtrl");
// accessors
// ---------
// get the total number of items in the control
size_t GetCount() const;
// indent is the number of pixels the children are indented relative to
// the parents position. SetIndent() also redraws the control
// immediately.
unsigned int GetIndent() const;
void SetIndent(unsigned int indent);
// image list: these functions allow to associate an image list with
// the control and retrieve it. Note that the control does _not_ delete
// the associated image list when it's deleted in order to allow image
// lists to be shared between different controls.
//
// The normal image list is for the icons which correspond to the
// normal tree item state (whether it is selected or not).
// Additionally, the application might choose to show a state icon
// which corresponds to an app-defined item state (for example,
// checked/unchecked) which are taken from the state image list.
wxImageList *GetImageList() const;
wxImageList *GetStateImageList() const;
void SetImageList(wxImageList *imageList);
void SetStateImageList(wxImageList *imageList);
// Functions to work with tree ctrl items. Unfortunately, they can _not_ be
// member functions of wxTreeItem because they must know the tree the item
// belongs to for Windows implementation and storing the pointer to
// wxTreeCtrl in each wxTreeItem is just too much waste.
// accessors
// ---------
// retrieve items label
wxString GetItemText(const wxTreeItemId& item) const;
// get the normal item image
int GetItemImage(const wxTreeItemId& item) const;
// get the selected item image
int GetItemSelectedImage(const wxTreeItemId& item) const;
// get the data associated with the item
wxTreeItemData *GetItemData(const wxTreeItemId& item) const;
// modifiers
// ---------
// set items label
void SetItemText(const wxTreeItemId& item, const wxString& text);
// set the normal item image
void SetItemImage(const wxTreeItemId& item, int image);
// set the selected item image
void SetItemSelectedImage(const wxTreeItemId& item, int image);
// associate some data with the item
void SetItemData(const wxTreeItemId& item, wxTreeItemData *data);
// force appearance of [+] button near the item. This is useful to
// allow the user to expand the items which don't have any children now
// - but instead add them only when needed, thus minimizing memory
// usage and loading time.
void SetItemHasChildren(const wxTreeItemId& item, bool has = TRUE);
// the item will be shown in bold
void SetItemBold(const wxTreeItemId& item, bool bold = TRUE);
// the item will be shown with a drop highlight
void SetItemDropHighlight(const wxTreeItemId& item, bool highlight = TRUE);
// item status inquiries
// ---------------------
// is the item visible (it might be outside the view or not expanded)?
bool IsVisible(const wxTreeItemId& item) const;
// does the item has any children?
bool ItemHasChildren(const wxTreeItemId& item) const;
// is the item expanded (only makes sense if HasChildren())?
bool IsExpanded(const wxTreeItemId& item) const;
// is this item currently selected (the same as has focus)?
bool IsSelected(const wxTreeItemId& item) const;
// is item text in bold font?
bool IsBold(const wxTreeItemId& item) const;
// number of children
// ------------------
// if 'recursively' is FALSE, only immediate children count, otherwise
// the returned number is the number of all items in this branch
size_t GetChildrenCount(const wxTreeItemId& item, bool recursively = TRUE);
// navigation
// ----------
// wxTreeItemId.IsOk() will return FALSE if there is no such item
// get the root tree item
wxTreeItemId GetRootItem() const;
// get the item currently selected (may return NULL if no selection)
wxTreeItemId GetSelection() const;
// get the parent of this item (may return NULL if root)
wxTreeItemId GetParent(const wxTreeItemId& item) const;
// for this enumeration function you must pass in a "cookie" parameter
// which is opaque for the application but is necessary for the library
// to make these functions reentrant (i.e. allow more than one
// enumeration on one and the same object simultaneously). Of course,
// the "cookie" passed to GetFirstChild() and GetNextChild() should be
// the same!
// get the first child of this item
wxTreeItemId GetFirstChild(const wxTreeItemId& item, long& _cookie) const;
// get the next child
wxTreeItemId GetNextChild(const wxTreeItemId& item, long& _cookie) const;
// get the last child of this item - this method doesn't use cookies
wxTreeItemId GetLastChild(const wxTreeItemId& item) const;
// get the next sibling of this item
wxTreeItemId GetNextSibling(const wxTreeItemId& item) const;
// get the previous sibling
wxTreeItemId GetPrevSibling(const wxTreeItemId& item) const;
// get first visible item
wxTreeItemId GetFirstVisibleItem() const;
// get the next visible item: item must be visible itself!
// see IsVisible() and wxTreeCtrl::GetFirstVisibleItem()
wxTreeItemId GetNextVisible(const wxTreeItemId& item) const;
// get the previous visible item: item must be visible itself!
wxTreeItemId GetPrevVisible(const wxTreeItemId& item) const;
// operations
// ----------
// add the root node to the tree
wxTreeItemId AddRoot(const wxString& text,
int image = -1, int selectedImage = -1,
wxTreeItemData *data = NULL);
// insert a new item in as the first child of the parent
wxTreeItemId PrependItem(const wxTreeItemId& parent,
const wxString& text,
int image = -1, int selectedImage = -1,
wxTreeItemData *data = NULL);
// insert a new item after a given one
wxTreeItemId InsertItem(const wxTreeItemId& parent,
const wxTreeItemId& idPrevious,
const wxString& text,
int image = -1, int selectedImage = -1,
wxTreeItemData *data = NULL);
// insert a new item in as the last child of the parent
wxTreeItemId AppendItem(const wxTreeItemId& parent,
const wxString& text,
int image = -1, int selectedImage = -1,
wxTreeItemData *data = NULL);
// delete this item and associated data if any
void Delete(const wxTreeItemId& item);
// delete all children (but don't delete the item itself)
// NB: this won't send wxEVT_COMMAND_TREE_ITEM_DELETED events
void DeleteChildren(const wxTreeItemId& item);
// delete all items from the tree
// NB: this won't send wxEVT_COMMAND_TREE_ITEM_DELETED events
void DeleteAllItems();
// expand this item
void Expand(const wxTreeItemId& item);
// collapse the item without removing its children
void Collapse(const wxTreeItemId& item);
// collapse the item and remove all children
void CollapseAndReset(const wxTreeItemId& item);
// toggles the current state
void Toggle(const wxTreeItemId& item);
// remove the selection from currently selected item (if any)
void Unselect();
// select this item
void SelectItem(const wxTreeItemId& item);
// make sure this item is visible (expanding the parent item and/or
// scrolling to this item if necessary)
void EnsureVisible(const wxTreeItemId& item);
// scroll to this item (but don't expand its parent)
void ScrollTo(const wxTreeItemId& item);
// start editing the item label: this (temporarily) replaces the item
// with a one line edit control. The item will be selected if it hadn't
// been before. textCtrlClass parameter allows you to create an edit
// control of arbitrary user-defined class deriving from wxTextCtrl.
wxTextCtrl* EditLabel(const wxTreeItemId& item,
wxClassInfo* textCtrlClass = CLASSINFO(wxTextCtrl));
// returns the same pointer as StartEdit() if the item is being edited,
// NULL otherwise (it's assumed that no more than one item may be
// edited simultaneously)
wxTextCtrl* GetEditControl() const;
// end editing and accept or discard the changes to item label
void EndEditLabel(const wxTreeItemId& item, bool discardChanges = FALSE);
// sorting
// this function is called to compare 2 items and should return -1, 0
// or +1 if the first item is less than, equal to or greater than the
// second one. The base class version performs alphabetic comparaison
// of item labels (GetText)
virtual int OnCompareItems(const wxTreeItemId& item1,
const wxTreeItemId& item2);
// sort the children of this item using OnCompareItems
//
// NB: this function is not reentrant and not MT-safe (FIXME)!
void SortChildren(const wxTreeItemId& item);
// helpers
// -------
// determine to which item (if any) belongs the given point (the
// coordinates specified are relative to the client area of tree ctrl)
// and fill the flags parameter with a bitmask of wxTREE_HITTEST_xxx
// constants.
//
// The first function is more portable (because easier to implement
// on other platforms), but the second one returns some extra info.
wxTreeItemId HitTest(const wxPoint& point)
{ int dummy; return HitTest(point, dummy); }
wxTreeItemId HitTest(const wxPoint& point, int& flags);
// get the bounding rectangle of the item (or of its label only)
bool GetBoundingRect(const wxTreeItemId& item,
wxRect& rect,
bool textOnly = FALSE) const;
// deprecated
// ----------
// these methods are deprecated and will be removed in future versions of
// wxWindows, they're here for compatibility only, don't use them in new
// code (the comments indicate why these methods are now useless and how to
// replace them)
// use Expand, Collapse, CollapseAndReset or Toggle
void ExpandItem(const wxTreeItemId& item, int action);
// use AddRoot, PrependItem or AppendItem
wxTreeItemId InsertItem(const wxTreeItemId& parent,
const wxString& text,
int image = -1, int selImage = -1,
long insertAfter = wxTREE_INSERT_LAST);
// use Set/GetImageList and Set/GetStateImageList
wxImageList *GetImageList(int) const
{ return GetImageList(); }
void SetImageList(wxImageList *imageList, int)
{ SetImageList(imageList); }
// implementation
// --------------
void Command(wxCommandEvent& event) { ProcessCommand(event); };
virtual bool MSWCommand(WXUINT param, WXWORD id);
virtual bool MSWNotify(WXWPARAM wParam, WXLPARAM lParam, WXLPARAM *result);
protected:
// SetImageList helper
void SetAnyImageList(wxImageList *imageList, int which);
wxTextCtrl* m_textCtrl; // used while editing the item label
wxImageList *m_imageListNormal, // images for tree elements
*m_imageListState; // special images for app defined states
private:
// the common part of all ctors
void Init();
// helper functions
inline bool DoGetItem(wxTreeViewItem *tvItem) const;
inline void DoSetItem(wxTreeViewItem *tvItem);
inline void DoExpand(const wxTreeItemId& item, int flag);
wxTreeItemId DoInsertItem(const wxTreeItemId& parent,
wxTreeItemId hInsertAfter,
const wxString& text,
int image, int selectedImage,
wxTreeItemData *data);
void DeleteTextCtrl();
DECLARE_DYNAMIC_CLASS(wxTreeCtrl)
};
// ----------------------------------------------------------------------------
// wxTreeEvent is a special class for all events associated with tree controls
//
// NB: note that not all accessors make sense for all events, see the event
// descriptions below
// ----------------------------------------------------------------------------
class WXDLLEXPORT wxTreeEvent : public wxNotifyEvent
{
friend wxTreeCtrl;
public:
wxTreeEvent(wxEventType commandType = wxEVT_NULL, int id = 0);
// accessors
// get the item on which the operation was performed or the newly
// selected item for wxEVT_COMMAND_TREE_SEL_CHANGED/ING events
wxTreeItemId GetItem() const { return m_item; }
// for wxEVT_COMMAND_TREE_SEL_CHANGED/ING events, get the previously
// selected item
wxTreeItemId GetOldItem() const { return m_itemOld; }
// the point where the mouse was when the drag operation started (for
// wxEVT_COMMAND_TREE_BEGIN_(R)DRAG events only)
wxPoint GetPoint() const { return m_pointDrag; }
// keyboard code (for wxEVT_COMMAND_TREE_KEY_DOWN only)
int GetCode() const { return m_code; }
private:
// @@ we could save some space by using union here
int m_code;
wxTreeItemId m_item,
m_itemOld;
wxPoint m_pointDrag;
DECLARE_DYNAMIC_CLASS(wxTreeEvent)
};
typedef void (wxEvtHandler::*wxTreeEventFunction)(wxTreeEvent&);
// ----------------------------------------------------------------------------
// macros for handling tree control events
// ----------------------------------------------------------------------------
// GetItem() returns the item being dragged, GetPoint() the mouse coords
#define EVT_TREE_BEGIN_DRAG(id, fn) { wxEVT_COMMAND_TREE_BEGIN_DRAG, id, -1, (wxObjectEventFunction) (wxEventFunction) (wxTreeEventFunction) & fn, (wxObject *) NULL },
#define EVT_TREE_BEGIN_RDRAG(id, fn) { wxEVT_COMMAND_TREE_BEGIN_RDRAG, id, -1, (wxObjectEventFunction) (wxEventFunction) (wxTreeEventFunction) & fn, (wxObject *) NULL },
// GetItem() returns the itme whose label is being edited
#define EVT_TREE_BEGIN_LABEL_EDIT(id, fn) { wxEVT_COMMAND_TREE_BEGIN_LABEL_EDIT, id, -1, (wxObjectEventFunction) (wxEventFunction) (wxTreeEventFunction) & fn, (wxObject *) NULL },
#define EVT_TREE_END_LABEL_EDIT(id, fn) { wxEVT_COMMAND_TREE_END_LABEL_EDIT, id, -1, (wxObjectEventFunction) (wxEventFunction) (wxTreeEventFunction) & fn, (wxObject *) NULL },
// provide/update information about GetItem() item
#define EVT_TREE_GET_INFO(id, fn) { wxEVT_COMMAND_TREE_GET_INFO, id, -1, (wxObjectEventFunction) (wxEventFunction) (wxTreeEventFunction) & fn, (wxObject *) NULL },
#define EVT_TREE_SET_INFO(id, fn) { wxEVT_COMMAND_TREE_SET_INFO, id, -1, (wxObjectEventFunction) (wxEventFunction) (wxTreeEventFunction) & fn, (wxObject *) NULL },
// GetItem() is the item being expanded/collapsed, the "ING" versions can use
#define EVT_TREE_ITEM_EXPANDED(id, fn) { wxEVT_COMMAND_TREE_ITEM_EXPANDED, id, -1, (wxObjectEventFunction) (wxEventFunction) (wxTreeEventFunction) & fn, (wxObject *) NULL },
#define EVT_TREE_ITEM_EXPANDING(id, fn) { wxEVT_COMMAND_TREE_ITEM_EXPANDING, id, -1, (wxObjectEventFunction) (wxEventFunction) (wxTreeEventFunction) & fn, (wxObject *) NULL },
#define EVT_TREE_ITEM_COLLAPSED(id, fn) { wxEVT_COMMAND_TREE_ITEM_COLLAPSED, id, -1, (wxObjectEventFunction) (wxEventFunction) (wxTreeEventFunction) & fn, (wxObject *) NULL },
#define EVT_TREE_ITEM_COLLAPSING(id, fn) { wxEVT_COMMAND_TREE_ITEM_COLLAPSING, id, -1, (wxObjectEventFunction) (wxEventFunction) (wxTreeEventFunction) & fn, NULL },
// GetOldItem() is the item which had the selection previously, GetItem() is
// the item which acquires selection
#define EVT_TREE_SEL_CHANGED(id, fn) { wxEVT_COMMAND_TREE_SEL_CHANGED, id, -1, (wxObjectEventFunction) (wxEventFunction) (wxTreeEventFunction) & fn, NULL },
#define EVT_TREE_SEL_CHANGING(id, fn) { wxEVT_COMMAND_TREE_SEL_CHANGING, id, -1, (wxObjectEventFunction) (wxEventFunction) (wxTreeEventFunction) & fn, NULL },
// GetCode() returns the key code
// NB: this is the only message for which GetItem() is invalid (you may get the
// item from GetSelection())
#define EVT_TREE_KEY_DOWN(id, fn) { wxEVT_COMMAND_TREE_KEY_DOWN, id, -1, (wxObjectEventFunction) (wxEventFunction) (wxTreeEventFunction) & fn, NULL },
// GetItem() returns the item being deleted, the associated data (if any) will
// be deleted just after the return of this event handler (if any)
#define EVT_TREE_DELETE_ITEM(id, fn) { wxEVT_COMMAND_TREE_DELETE_ITEM, id, -1, (wxObjectEventFunction) (wxEventFunction) (wxTreeEventFunction) & fn, (wxObject *) NULL },
// GetItem() returns the item that was activated (double click, enter, space)
#define EVT_TREE_ITEM_ACTIVATED(id, fn) { wxEVT_COMMAND_TREE_ITEM_ACTIVATED, id, -1, (wxObjectEventFunction) (wxEventFunction) (wxTreeEventFunction) & fn, NULL },
#endif
// _WX_TREECTRL_H_
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