///////////////////////////////////////////////////////////////////////////// // Name: treectrl.h // Purpose: wxTreeCtrl class // Author: Robert Roebling // Modified by: // Created: 01/02/97 // RCS-ID: $Id$ // Copyright: (c) 1997,1998 Robert Roebling // Licence: wxWindows license ///////////////////////////////////////////////////////////////////////////// #ifndef _GENERIC_TREECTRL_H_ #define _GENERIC_TREECTRL_H_ #ifdef __GNUG__ #pragma interface "treectrl.h" #endif #ifdef __WXMSW__ WXDLLEXPORT_DATA(extern const char*) wxTreeCtrlNameStr; #else #define wxTreeCtrlNameStr "wxTreeCtrl" #endif #include "wx/defs.h" #include "wx/string.h" #include "wx/object.h" #include "wx/event.h" #include "wx/scrolwin.h" #include "wx/textctrl.h" #include "wx/pen.h" #include "wx/dynarray.h" //those defines should only be done in generic/treectrl.h, //because wxMSW doesn't allow mutiple selection #ifndef wxTR_SINGLE #define wxTR_SINGLE 0x0000 #define wxTR_MULTIPLE 0x0020 #define wxTR_EXTENDED 0x0040 #define wxTR_HAS_VARIABLE_ROW_HIGHT 0x0080 #endif // ----------------------------------------------------------------------------- // constants // ----------------------------------------------------------------------------- // values for the `flags' parameter of wxTreeCtrl::HitTest() which determine // where exactly the specified point is situated: static const int wxTREE_HITTEST_ABOVE = 0x0001; static const int wxTREE_HITTEST_BELOW = 0x0002; static const int wxTREE_HITTEST_NOWHERE = 0x0004; // on the button associated with an item. static const int wxTREE_HITTEST_ONITEMBUTTON = 0x0008; // on the bitmap associated with an item. static const int wxTREE_HITTEST_ONITEMICON = 0x0010; // on the ident associated with an item. static const int wxTREE_HITTEST_ONITEMIDENT = 0x0020; // on the label (string) associated with an item. static const int wxTREE_HITTEST_ONITEMLABEL = 0x0040; // on the right of the label associated with an item. static const int wxTREE_HITTEST_ONITEMRIGHT = 0x0080; // on the label (string) associated with an item. //static const int wxTREE_HITTEST_ONITEMSTATEICON = 0x0100; // on the left of the wxTreeCtrl. static const int wxTREE_HITTEST_TOLEFT = 0x0200; // on the right of the wxTreeCtrl. static const int wxTREE_HITTEST_TORIGHT = 0x0400; // on the upper part (first half) of the item. static const int wxTREE_HITTEST_ONITEMUPPERPART = 0x0800; // on the lower part (second half) of the item. static const int wxTREE_HITTEST_ONITEMLOWERPART = 0x1000; // anywhere on the item static const int wxTREE_HITTEST_ONITEM = wxTREE_HITTEST_ONITEMICON | wxTREE_HITTEST_ONITEMLABEL; // ----------------------------------------------------------------------------- // forward declaration // ----------------------------------------------------------------------------- class wxImageList; class wxGenericTreeItem; class wxTreeItemData; // ----------------------------------------------------------------------------- // wxTreeItemId - unique identifier of a tree element // ----------------------------------------------------------------------------- class WXDLLEXPORT wxTreeItemId { friend class wxTreeCtrl; friend class wxTreeEvent; public: // ctors // 0 is invalid value for HTREEITEM wxTreeItemId() { m_pItem = 0; } // default copy ctor/assignment operator are ok for us // accessors // is this a valid tree item? bool IsOk() const { return m_pItem != 0; } // deprecated: only for compatibility wxTreeItemId(long itemId) { m_pItem = (wxGenericTreeItem *)itemId; } operator long() const { return (long)m_pItem; } //protected: // not for gcc // for wxTreeCtrl usage only wxTreeItemId(wxGenericTreeItem *pItem) { m_pItem = pItem; } wxGenericTreeItem *m_pItem; }; WX_DECLARE_OBJARRAY(wxTreeItemId, wxArrayTreeItemIds); // ---------------------------------------------------------------------------- // wxTreeItemData is some (arbitrary) user class associated with some item. // // Because the objects of this class are deleted by the tree, they should // always be allocated on the heap! // ---------------------------------------------------------------------------- class WXDLLEXPORT wxTreeItemData: public wxClientData { friend class wxTreeCtrl; public: // creation/destruction // -------------------- // default ctor wxTreeItemData() { } // default copy ctor/assignment operator are ok // accessor: get the item associated with us const wxTreeItemId& GetId() const { return m_pItem; } void SetId(const wxTreeItemId& id) { m_pItem = id; } protected: wxTreeItemId m_pItem; }; // ----------------------------------------------------------------------------- // wxTreeEvent - the event generated by the tree control // ----------------------------------------------------------------------------- class WXDLLEXPORT wxTreeEvent : public wxNotifyEvent { friend class 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; } // set return code for wxEVT_COMMAND_TREE_ITEM_{EXPAND|COLLAPS}ING events // call this to forbid the change in item status void Veto() { m_code = TRUE; } // for implementation usage only bool WasVetoed() 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 }, // ----------------------------------------------------------------------------- // wxTreeCtrl - the tree control // ----------------------------------------------------------------------------- class WXDLLEXPORT wxTreeCtrl : public wxScrolledWindow { 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 = wxTreeCtrlNameStr) { 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 = wxTreeCtrlNameStr); // 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 { return m_indent; } void SetIndent(unsigned int indent); // spacing is the number of pixels between the start and the Text unsigned int GetSpacing() const { return m_spacing; } void SetSpacing(unsigned int 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. // 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); // 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 HasChildren(const wxTreeItemId& item) const { return ItemHasChildren(item); } 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 { return m_anchor; } // get the item currently selected (may return NULL if no selection) wxTreeItemId GetSelection() const { return m_current; } // get the items currently selected, return the number of such item size_t GetSelections(wxArrayTreeItemIds&) 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(); void UnselectAll(); // select this item void SelectItem(const wxTreeItemId& item, bool unselect_others=TRUE, bool extended_select=FALSE); // 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); // 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); // 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); // callbacks void OnPaint( wxPaintEvent &event ); void OnSetFocus( wxFocusEvent &event ); void OnKillFocus( wxFocusEvent &event ); void OnChar( wxKeyEvent &event ); void OnMouse( wxMouseEvent &event ); void OnIdle( wxIdleEvent &event ); // implementation void SendDeleteEvent(wxGenericTreeItem *itemBeingDeleted); // Draw Special Information void DrawBorder(wxTreeItemId& item); void DrawLine(wxTreeItemId& item, bool below); protected: friend class wxGenericTreeItem; wxGenericTreeItem *m_anchor; wxGenericTreeItem *m_current, *m_key_current; bool m_hasFocus; bool m_dirty; int m_xScroll,m_yScroll; unsigned int m_indent; unsigned int m_spacing; int m_lineHeight; wxPen m_dottedPen; wxBrush *m_hilightBrush; wxImageList *m_imageListNormal, *m_imageListState; int m_dragCount; // the common part of all ctors void Init(); // misc helpers wxTreeItemId DoInsertItem(const wxTreeItemId& parent, size_t previous, const wxString& text, int image, int selectedImage, wxTreeItemData *data); void AdjustMyScrollbars(); int GetLineHeight(wxGenericTreeItem *item) const; void PaintLevel( wxGenericTreeItem *item, wxDC& dc, int level, int &y ); void PaintItem( wxGenericTreeItem *item, wxDC& dc); void CalculateLevel( wxGenericTreeItem *item, wxDC &dc, int level, int &y ); void CalculatePositions(); void CalculateSize( wxGenericTreeItem *item, wxDC &dc ); void RefreshSubtree( wxGenericTreeItem *item ); void RefreshLine( wxGenericTreeItem *item ); void FillArray(wxGenericTreeItem*, wxArrayTreeItemIds&) const; void SelectItemRange( wxGenericTreeItem *item1, wxGenericTreeItem *item2 ); bool TagAllChildrenUntilLast(wxGenericTreeItem *crt_item, wxGenericTreeItem *last_item, bool select); bool TagNextChildren(wxGenericTreeItem *crt_item, wxGenericTreeItem *last_item, bool select); void UnselectAllChildren( wxGenericTreeItem *item ); private: DECLARE_EVENT_TABLE() DECLARE_DYNAMIC_CLASS(wxTreeCtrl) }; #endif // _GENERIC_TREECTRL_H_