include/wx/generic/treectlg.h

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        wx/generic/treectlg.h
   3 // Purpose:     wxTreeCtrl class
   4 // Author:      Robert Roebling
   5 // Modified by:
   6 // Created:     01/02/97
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) 1997,1998 Robert Roebling
   9 // Licence:     wxWindows licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 #ifndef _GENERIC_TREECTRL_H_
  13 #define _GENERIC_TREECTRL_H_
  14
  15 #if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
  16     #pragma interface "treectlg.h"
  17 #endif
  18
  19 #if wxUSE_TREECTRL
  20
  21 #include "wx/scrolwin.h"
  22 #include "wx/pen.h"
  23 #include "wx/imaglist.h"
  24
  25 // -----------------------------------------------------------------------------
  26 // forward declaration
  27 // -----------------------------------------------------------------------------
  28
  29 class WXDLLEXPORT wxGenericTreeItem;
  30
  31 class WXDLLEXPORT wxTreeItemData;
  32
  33 class WXDLLEXPORT wxTreeRenameTimer;
  34 class WXDLLEXPORT wxTreeFindTimer;
  35 class WXDLLEXPORT wxTreeTextCtrl;
  36 class WXDLLEXPORT wxTextCtrl;
  37
  38 // -----------------------------------------------------------------------------
  39 // wxGenericTreeCtrl - the tree control
  40 // -----------------------------------------------------------------------------
  41
  42 class WXDLLEXPORT wxGenericTreeCtrl : public wxScrolledWindow
  43 {
  44 public:
  45     // creation
  46     // --------
  47     wxGenericTreeCtrl() { Init(); }
  48
  49     wxGenericTreeCtrl(wxWindow *parent, wxWindowID id = wxID_ANY,
  50                const wxPoint& pos = wxDefaultPosition,
  51                const wxSize& size = wxDefaultSize,
  52                long style = wxTR_DEFAULT_STYLE,
  53                const wxValidator &validator = wxDefaultValidator,
  54                const wxString& name = wxTreeCtrlNameStr)
  55     {
  56         Init();
  57         Create(parent, id, pos, size, style, validator, name);
  58     }
  59
  60     virtual ~wxGenericTreeCtrl();
  61
  62     bool Create(wxWindow *parent, wxWindowID id = wxID_ANY,
  63                 const wxPoint& pos = wxDefaultPosition,
  64                 const wxSize& size = wxDefaultSize,
  65                 long style = wxTR_DEFAULT_STYLE,
  66                 const wxValidator &validator = wxDefaultValidator,
  67                 const wxString& name = wxTreeCtrlNameStr);
  68
  69     // accessors
  70     // ---------
  71
  72         // get the total number of items in the control
  73     size_t GetCount() const;
  74
  75         // indent is the number of pixels the children are indented relative to
  76         // the parents position. SetIndent() also redraws the control
  77         // immediately.
  78     unsigned int GetIndent() const { return m_indent; }
  79     void SetIndent(unsigned int indent);
  80
  81         // spacing is the number of pixels between the start and the Text
  82     unsigned int GetSpacing() const { return m_spacing; }
  83     void SetSpacing(unsigned int spacing);
  84
  85         // image list: these functions allow to associate an image list with
  86         // the control and retrieve it. Note that when assigned with
  87         // SetImageList, the control does _not_ delete
  88         // the associated image list when it's deleted in order to allow image
  89         // lists to be shared between different controls. If you use
  90         // AssignImageList, the control _does_ delete the image list.
  91         //
  92         // The normal image list is for the icons which correspond to the
  93         // normal tree item state (whether it is selected or not).
  94         // Additionally, the application might choose to show a state icon
  95         // which corresponds to an app-defined item state (for example,
  96         // checked/unchecked) which are taken from the state image list.
  97     wxImageList *GetImageList() const;
  98     wxImageList *GetStateImageList() const;
  99     wxImageList *GetButtonsImageList() const;
 100
 101     void SetImageList(wxImageList *imageList);
 102     void SetStateImageList(wxImageList *imageList);
 103     void SetButtonsImageList(wxImageList *imageList);
 104     void AssignImageList(wxImageList *imageList);
 105     void AssignStateImageList(wxImageList *imageList);
 106     void AssignButtonsImageList(wxImageList *imageList);
 107
 108     // Functions to work with tree ctrl items.
 109
 110     // accessors
 111     // ---------
 112
 113         // retrieve item's label
 114     wxString GetItemText(const wxTreeItemId& item) const;
 115         // get one of the images associated with the item (normal by default)
 116     int GetItemImage(const wxTreeItemId& item,
 117                      wxTreeItemIcon which = wxTreeItemIcon_Normal) const;
 118         // get the data associated with the item
 119     wxTreeItemData *GetItemData(const wxTreeItemId& item) const;
 120
 121         // get the item's text colour
 122     wxColour GetItemTextColour(const wxTreeItemId& item) const;
 123
 124         // get the item's background colour
 125     wxColour GetItemBackgroundColour(const wxTreeItemId& item) const;
 126
 127         // get the item's font
 128     wxFont GetItemFont(const wxTreeItemId& item) const;
 129
 130     // modifiers
 131     // ---------
 132
 133         // set item's label
 134     void SetItemText(const wxTreeItemId& item, const wxString& text);
 135         // get one of the images associated with the item (normal by default)
 136     void SetItemImage(const wxTreeItemId& item, int image,
 137                       wxTreeItemIcon which = wxTreeItemIcon_Normal);
 138         // associate some data with the item
 139     void SetItemData(const wxTreeItemId& item, wxTreeItemData *data);
 140
 141         // force appearance of [+] button near the item. This is useful to
 142         // allow the user to expand the items which don't have any children now
 143         // - but instead add them only when needed, thus minimizing memory
 144         // usage and loading time.
 145     void SetItemHasChildren(const wxTreeItemId& item, bool has = true);
 146
 147         // the item will be shown in bold
 148     void SetItemBold(const wxTreeItemId& item, bool bold = true);
 149
 150         // set the item's text colour
 151     void SetItemTextColour(const wxTreeItemId& item, const wxColour& col);
 152
 153         // set the item's background colour
 154     void SetItemBackgroundColour(const wxTreeItemId& item, const wxColour& col);
 155
 156         // set the item's font (should be of the same height for all items)
 157     void SetItemFont(const wxTreeItemId& item, const wxFont& font);
 158
 159         // set the window font
 160     virtual bool SetFont( const wxFont &font );
 161
 162        // set the styles.  No need to specify a GetWindowStyle here since
 163        // the base wxWindow member function will do it for us
 164     void SetWindowStyle(const long styles);
 165
 166     // item status inquiries
 167     // ---------------------
 168
 169         // is the item visible (it might be outside the view or not expanded)?
 170     bool IsVisible(const wxTreeItemId& item) const;
 171         // does the item has any children?
 172     bool HasChildren(const wxTreeItemId& item) const
 173       { return ItemHasChildren(item); }
 174     bool ItemHasChildren(const wxTreeItemId& item) const;
 175         // is the item expanded (only makes sense if HasChildren())?
 176     bool IsExpanded(const wxTreeItemId& item) const;
 177         // is this item currently selected (the same as has focus)?
 178     bool IsSelected(const wxTreeItemId& item) const;
 179         // is item text in bold font?
 180     bool IsBold(const wxTreeItemId& item) const;
 181         // does the layout include space for a button?
 182
 183     // number of children
 184     // ------------------
 185
 186         // if 'recursively' is false, only immediate children count, otherwise
 187         // the returned number is the number of all items in this branch
 188     size_t GetChildrenCount(const wxTreeItemId& item,
 189                             bool recursively = true) const;
 190
 191     // navigation
 192     // ----------
 193
 194     // wxTreeItemId.IsOk() will return false if there is no such item
 195
 196         // get the root tree item
 197     wxTreeItemId GetRootItem() const { return m_anchor; }
 198
 199         // get the item currently selected (may return NULL if no selection)
 200     wxTreeItemId GetSelection() const { return m_current; }
 201
 202         // get the items currently selected, return the number of such item
 203     size_t GetSelections(wxArrayTreeItemIds&) const;
 204
 205         // get the parent of this item (may return NULL if root)
 206     wxTreeItemId GetItemParent(const wxTreeItemId& item) const;
 207
 208 #if WXWIN_COMPATIBILITY_2_2
 209         // deprecated:  Use GetItemParent instead.
 210     wxTreeItemId GetParent(const wxTreeItemId& item) const
 211         { return GetItemParent( item ); }
 212
 213         // Expose the base class method hidden by the one above.
 214     wxWindow *GetParent() const { return wxScrolledWindow::GetParent(); }
 215 #endif  // WXWIN_COMPATIBILITY_2_2
 216
 217         // for this enumeration function you must pass in a "cookie" parameter
 218         // which is opaque for the application but is necessary for the library
 219         // to make these functions reentrant (i.e. allow more than one
 220         // enumeration on one and the same object simultaneously). Of course,
 221         // the "cookie" passed to GetFirstChild() and GetNextChild() should be
 222         // the same!
 223
 224         // get the first child of this item
 225     wxTreeItemId GetFirstChild(const wxTreeItemId& item,
 226                                wxTreeItemIdValue& cookie) const;
 227         // get the next child
 228     wxTreeItemId GetNextChild(const wxTreeItemId& item,
 229                               wxTreeItemIdValue& cookie) const;
 230         // get the last child of this item - this method doesn't use cookies
 231     wxTreeItemId GetLastChild(const wxTreeItemId& item) const;
 232
 233         // get the next sibling of this item
 234     wxTreeItemId GetNextSibling(const wxTreeItemId& item) const;
 235         // get the previous sibling
 236     wxTreeItemId GetPrevSibling(const wxTreeItemId& item) const;
 237
 238         // get first visible item
 239     wxTreeItemId GetFirstVisibleItem() const;
 240         // get the next visible item: item must be visible itself!
 241         // see IsVisible() and wxTreeCtrl::GetFirstVisibleItem()
 242     wxTreeItemId GetNextVisible(const wxTreeItemId& item) const;
 243         // get the previous visible item: item must be visible itself!
 244     wxTreeItemId GetPrevVisible(const wxTreeItemId& item) const;
 245
 246         // Only for internal use right now, but should probably be public
 247     wxTreeItemId GetNext(const wxTreeItemId& item) const;
 248
 249     // operations
 250     // ----------
 251
 252         // add the root node to the tree
 253     wxTreeItemId AddRoot(const wxString& text,
 254                          int image = -1, int selectedImage = -1,
 255                          wxTreeItemData *data = NULL);
 256
 257         // insert a new item in as the first child of the parent
 258     wxTreeItemId PrependItem(const wxTreeItemId& parent,
 259                              const wxString& text,
 260                              int image = -1, int selectedImage = -1,
 261                              wxTreeItemData *data = NULL);
 262
 263         // insert a new item after a given one
 264     wxTreeItemId InsertItem(const wxTreeItemId& parent,
 265                             const wxTreeItemId& idPrevious,
 266                             const wxString& text,
 267                             int image = -1, int selectedImage = -1,
 268                             wxTreeItemData *data = NULL);
 269
 270         // insert a new item before the one with the given index
 271     wxTreeItemId InsertItem(const wxTreeItemId& parent,
 272                             size_t index,
 273                             const wxString& text,
 274                             int image = -1, int selectedImage = -1,
 275                             wxTreeItemData *data = NULL);
 276
 277         // insert a new item in as the last child of the parent
 278     wxTreeItemId AppendItem(const wxTreeItemId& parent,
 279                             const wxString& text,
 280                             int image = -1, int selectedImage = -1,
 281                             wxTreeItemData *data = NULL);
 282
 283         // delete this item and associated data if any
 284     void Delete(const wxTreeItemId& item);
 285         // delete all children (but don't delete the item itself)
 286         // NB: this won't send wxEVT_COMMAND_TREE_ITEM_DELETED events
 287     void DeleteChildren(const wxTreeItemId& item);
 288         // delete all items from the tree
 289         // NB: this won't send wxEVT_COMMAND_TREE_ITEM_DELETED events
 290     void DeleteAllItems();
 291
 292         // expand this item
 293     void Expand(const wxTreeItemId& item);
 294         // expand this item and all subitems recursively
 295     void ExpandAll(const wxTreeItemId& item);
 296         // collapse the item without removing its children
 297     void Collapse(const wxTreeItemId& item);
 298         // collapse the item and remove all children
 299     void CollapseAndReset(const wxTreeItemId& item);
 300         // toggles the current state
 301     void Toggle(const wxTreeItemId& item);
 302
 303         // remove the selection from currently selected item (if any)
 304     void Unselect();
 305         // or from the given one (multiselect mode only)
 306     void UnselectItem(const wxTreeItemId& item) { SelectItem(item, false); }
 307         // or from all
 308     void UnselectAll();
 309         // select this item
 310     void SelectItem(const wxTreeItemId& item, bool select = true);
 311         // toggle the item selection
 312     void ToggleItemSelection(const wxTreeItemId& item)
 313     {
 314         SelectItem(item, !IsSelected(item));
 315     }
 316
 317         // make sure this item is visible (expanding the parent item and/or
 318         // scrolling to this item if necessary)
 319     void EnsureVisible(const wxTreeItemId& item);
 320         // scroll to this item (but don't expand its parent)
 321     void ScrollTo(const wxTreeItemId& item);
 322     void AdjustMyScrollbars();
 323
 324         // The first function is more portable (because easier to implement
 325         // on other platforms), but the second one returns some extra info.
 326     wxTreeItemId HitTest(const wxPoint& point)
 327         { int dummy; return HitTest(point, dummy); }
 328     wxTreeItemId HitTest(const wxPoint& point, int& flags);
 329
 330         // get the bounding rectangle of the item (or of its label only)
 331     bool GetBoundingRect(const wxTreeItemId& item,
 332                          wxRect& rect,
 333                          bool textOnly = false) const;
 334
 335         // Start editing the item label: this (temporarily) replaces the item
 336         // with a one line edit control. The item will be selected if it hadn't
 337         // been before.
 338     void EditLabel( const wxTreeItemId& item ) { Edit( item ); }
 339     void Edit( const wxTreeItemId& item );
 340         // returns a pointer to the text edit control if the item is being
 341         // edited, NULL otherwise (it's assumed that no more than one item may
 342         // be edited simultaneously)
 343     wxTextCtrl* GetEditControl() const;
 344
 345     // sorting
 346         // this function is called to compare 2 items and should return -1, 0
 347         // or +1 if the first item is less than, equal to or greater than the
 348         // second one. The base class version performs alphabetic comparaison
 349         // of item labels (GetText)
 350     virtual int OnCompareItems(const wxTreeItemId& item1,
 351                                const wxTreeItemId& item2);
 352         // sort the children of this item using OnCompareItems
 353         //
 354         // NB: this function is not reentrant and not MT-safe (FIXME)!
 355     void SortChildren(const wxTreeItemId& item);
 356
 357 #if WXWIN_COMPATIBILITY_2_4
 358     // deprecated functions: use Set/GetItemImage directly
 359     int GetItemSelectedImage(const wxTreeItemId& item) const
 360         { return GetItemImage(item, wxTreeItemIcon_Selected); }
 361     void SetItemSelectedImage(const wxTreeItemId& item, int image)
 362         { SetItemImage(item, image, wxTreeItemIcon_Selected); }
 363
 364     // use the versions taking wxTreeItemIdValue cookies (note that
 365     // GetNextChild() is not inside wxDEPRECATED on purpose, as otherwise we
 366     // get twice as many warnings without any added benefit: it is always used
 367     // with GetFirstChild() anyhow)
 368     wxDEPRECATED( wxTreeItemId GetFirstChild(const wxTreeItemId& item,
 369                                              long& cookie) const );
 370     wxTreeItemId GetNextChild(const wxTreeItemId& item,
 371                               long& cookie) const;
 372 #endif // WXWIN_COMPATIBILITY_2_4
 373
 374     virtual bool ShouldInheritColours() const { return false; }
 375
 376     // implementation only from now on
 377
 378     // overridden base class virtuals
 379     virtual bool SetBackgroundColour(const wxColour& colour);
 380     virtual bool SetForegroundColour(const wxColour& colour);
 381
 382     virtual void Freeze();
 383     virtual void Thaw();
 384
 385     // callbacks
 386     void OnPaint( wxPaintEvent &event );
 387     void OnSetFocus( wxFocusEvent &event );
 388     void OnKillFocus( wxFocusEvent &event );
 389     void OnChar( wxKeyEvent &event );
 390     void OnMouse( wxMouseEvent &event );
 391     void OnGetToolTip( wxTreeEvent &event );
 392     void OnInternalIdle( );
 393
 394     virtual wxVisualAttributes GetDefaultAttributes() const
 395     {
 396         return GetClassDefaultAttributes(GetWindowVariant());
 397     }
 398
 399     static wxVisualAttributes
 400     GetClassDefaultAttributes(wxWindowVariant variant = wxWINDOW_VARIANT_NORMAL);
 401
 402     // implementation helpers
 403 protected:
 404     friend class wxGenericTreeItem;
 405     friend class wxTreeRenameTimer;
 406     friend class wxTreeFindTimer;
 407     friend class wxTreeTextCtrl;
 408
 409     wxFont               m_normalFont;
 410     wxFont               m_boldFont;
 411
 412     wxGenericTreeItem   *m_anchor;
 413     wxGenericTreeItem   *m_current,
 414                         *m_key_current,
 415                         // A hint to select a parent item after deleting a child
 416                         *m_select_me;
 417     unsigned short       m_indent;
 418     unsigned short       m_spacing;
 419     int                  m_lineHeight;
 420     wxPen                m_dottedPen;
 421     wxBrush             *m_hilightBrush,
 422                         *m_hilightUnfocusedBrush;
 423     bool                 m_hasFocus;
 424     bool                 m_dirty;
 425     bool                 m_ownsImageListNormal,
 426                          m_ownsImageListState,
 427                          m_ownsImageListButtons;
 428     bool                 m_isDragging; // true between BEGIN/END drag events
 429     bool                 m_lastOnSame;  // last click on the same item as prev
 430     wxImageList         *m_imageListNormal,
 431                         *m_imageListState,
 432                         *m_imageListButtons;
 433
 434     int                  m_freezeCount;
 435     int                  m_dragCount;
 436     wxPoint              m_dragStart;
 437     wxGenericTreeItem   *m_dropTarget;
 438     wxCursor             m_oldCursor;  // cursor is changed while dragging
 439     wxGenericTreeItem   *m_oldSelection;
 440     wxGenericTreeItem   *m_underMouse; // for visual effects
 441     wxTreeTextCtrl      *m_textCtrl;
 442
 443     wxTimer             *m_renameTimer;
 444
 445     // incremental search data
 446     wxString             m_findPrefix;
 447     wxTimer             *m_findTimer;
 448
 449     // the common part of all ctors
 450     void Init();
 451
 452     // misc helpers
 453     void SendDeleteEvent(wxGenericTreeItem *itemBeingDeleted);
 454
 455     void DrawBorder(const wxTreeItemId& item);
 456     void DrawLine(const wxTreeItemId& item, bool below);
 457     void DrawDropEffect(wxGenericTreeItem *item);
 458
 459     void DoSelectItem(const wxTreeItemId& id,
 460                       bool unselect_others = true,
 461                       bool extended_select = false);
 462
 463     wxTreeItemId DoInsertItem(const wxTreeItemId& parent,
 464                               size_t previous,
 465                               const wxString& text,
 466                               int image, int selectedImage,
 467                               wxTreeItemData *data);
 468
 469     // called by wxTextTreeCtrl when it marks itself for deletion
 470     void ResetTextControl();
 471
 472     // find the first item starting with the given prefix after the given item
 473     wxTreeItemId FindItem(const wxTreeItemId& id, const wxString& prefix) const;
 474
 475     bool HasButtons() const { return HasFlag(wxTR_HAS_BUTTONS); }
 476
 477     void CalculateLineHeight();
 478     int  GetLineHeight(wxGenericTreeItem *item) const;
 479     void PaintLevel( wxGenericTreeItem *item, wxDC& dc, int level, int &y );
 480     void PaintItem( wxGenericTreeItem *item, wxDC& dc);
 481
 482     void CalculateLevel( wxGenericTreeItem *item, wxDC &dc, int level, int &y );
 483     void CalculatePositions();
 484     void CalculateSize( wxGenericTreeItem *item, wxDC &dc );
 485
 486     void RefreshSubtree( wxGenericTreeItem *item );
 487     void RefreshLine( wxGenericTreeItem *item );
 488
 489     // redraw all selected items
 490     void RefreshSelected();
 491
 492     // RefreshSelected() recursive helper
 493     void RefreshSelectedUnder(wxGenericTreeItem *item);
 494
 495     void OnRenameTimer();
 496     bool OnRenameAccept(wxGenericTreeItem *item, const wxString& value);
 497     void OnRenameCancelled(wxGenericTreeItem *item);
 498
 499     void FillArray(wxGenericTreeItem*, wxArrayTreeItemIds&) const;
 500     void SelectItemRange( wxGenericTreeItem *item1, wxGenericTreeItem *item2 );
 501     bool TagAllChildrenUntilLast(wxGenericTreeItem *crt_item, wxGenericTreeItem *last_item, bool select);
 502     bool TagNextChildren(wxGenericTreeItem *crt_item, wxGenericTreeItem *last_item, bool select);
 503     void UnselectAllChildren( wxGenericTreeItem *item );
 504
 505 private:
 506     DECLARE_EVENT_TABLE()
 507     DECLARE_DYNAMIC_CLASS(wxGenericTreeCtrl)
 508     DECLARE_NO_COPY_CLASS(wxGenericTreeCtrl)
 509 };
 510
 511 #if !defined(__WXMSW__) || defined(__WXUNIVERSAL__)
 512 /*
 513  * wxTreeCtrl has to be a real class or we have problems with
 514  * the run-time information.
 515  */
 516
 517 class WXDLLEXPORT wxTreeCtrl: public wxGenericTreeCtrl
 518 {
 519     DECLARE_DYNAMIC_CLASS(wxTreeCtrl)
 520
 521 public:
 522     wxTreeCtrl() {}
 523
 524     wxTreeCtrl(wxWindow *parent, wxWindowID id = wxID_ANY,
 525                const wxPoint& pos = wxDefaultPosition,
 526                const wxSize& size = wxDefaultSize,
 527                long style = wxTR_DEFAULT_STYLE,
 528                const wxValidator &validator = wxDefaultValidator,
 529                const wxString& name = wxTreeCtrlNameStr)
 530     : wxGenericTreeCtrl(parent, id, pos, size, style, validator, name)
 531     {
 532     }
 533 };
 534 #endif // !__WXMSW__ || __WXUNIVERSAL__
 535
 536 #endif // wxUSE_TREECTRL
 537
 538 #endif // _GENERIC_TREECTRL_H_
 539