///////////////////////////////////////////////////////////////////////////// // Name: treectrl.h // Purpose: wxTreeCtrl class // Author: David Webster // Modified by: // Created: 10/17/99 // RCS-ID: $Id$ // Copyright: (c) David Webster // Licence: wxWindows licence ///////////////////////////////////////////////////////////////////////////// #ifndef _WX_TREECTRL_H_ #define _WX_TREECTRL_H_ #include "wx/textctrl.h" #include "wx/dynarray.h" // 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; }; WX_DEFINE_EXPORTED_ARRAY(wxTreeItemId, wxArrayTreeItemIds); // ---------------------------------------------------------------------------- // 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; } const wxTreeItemId GetId() const { return *this; } }; // ---------------------------------------------------------------------------- // 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); // spacing is the number of pixels between the start and the Text // not implemented under wxMSW unsigned int GetSpacing() const { return 18; } // return wxGTK default void SetSpacing(unsigned int WXUNUSED(spacing)) { } // 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 one of the images associated with the item (normal by default) int GetItemImage(const wxTreeItemId& item, wxTreeItemIcon which = wxTreeItemIcon_Normal) 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); // get one of the images associated with the item (normal by default) void SetItemImage(const wxTreeItemId& item, int image, wxTreeItemIcon which = wxTreeItemIcon_Normal); // 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) const; // 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 items currently selected, return the number of such item // // NB: this operation is expensive and can take a long time for a // control with a lot of items (~ O(number of items)). size_t GetSelections(wxArrayTreeItemIds& selections) 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(); // unselect all items (only makes sense for multiple selection control) void UnselectAll(); // 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); } // use Set/GetItemImage directly // get the selected item image int GetItemSelectedImage(const wxTreeItemId& item) const { return GetItemImage(item, wxTreeItemIcon_Selected); } // set the selected item image void SetItemSelectedImage(const wxTreeItemId& item, int image) { SetItemImage(item, image, wxTreeItemIcon_Selected); } // implementation // -------------- virtual bool OS2Command(WXUINT param, WXWORD id); virtual bool OS2OnNotify(int idCtrl, WXLPARAM lParam, WXLPARAM *result); // get/set the check state for the item (only for wxTR_MULTIPLE) bool IsItemChecked(const wxTreeItemId& item) const; void SetItemCheck(const wxTreeItemId& item, bool check = TRUE); 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); int DoGetItemImageFromData(const wxTreeItemId& item, wxTreeItemIcon which) const; void DoSetItemImageFromData(const wxTreeItemId& item, int image, wxTreeItemIcon which) const; void DoSetItemImages(const wxTreeItemId& item, int image, int imageSel); void DeleteTextCtrl(); // support for additional item images friend class wxTreeItemIndirectData; void SetIndirectItemData(const wxTreeItemId& item, wxTreeItemIndirectData *data); bool HasIndirectData(const wxTreeItemId& item) const; wxArrayTreeItemIds m_itemsWithIndirectData; DECLARE_DYNAMIC_CLASS(wxTreeCtrl) }; #endif // _WX_TREECTRL_H_