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 = -1,
  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 = -1,
  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, bool recursively = TRUE);
 189
 190     // navigation
 191     // ----------
 192
 193     // wxTreeItemId.IsOk() will return FALSE if there is no such item
 194
 195         // get the root tree item
 196     wxTreeItemId GetRootItem() const { return m_anchor; }
 197
 198         // get the item currently selected (may return NULL if no selection)
 199     wxTreeItemId GetSelection() const { return m_current; }
 200
 201         // get the items currently selected, return the number of such item
 202     size_t GetSelections(wxArrayTreeItemIds&) const;
 203
 204         // get the parent of this item (may return NULL if root)
 205     wxTreeItemId GetItemParent(const wxTreeItemId& item) const;
 206
 207 #if WXWIN_COMPATIBILITY_2_2
 208         // deprecated:  Use GetItemParent instead.
 209     wxTreeItemId GetParent(const wxTreeItemId& item) const
 210         { return GetItemParent( item ); }
 211
 212         // Expose the base class method hidden by the one above.
 213     wxWindow *GetParent() const { return wxScrolledWindow::GetParent(); }
 214 #endif  // WXWIN_COMPATIBILITY_2_2
 215
 216         // for this enumeration function you must pass in a "cookie" parameter
 217         // which is opaque for the application but is necessary for the library
 218         // to make these functions reentrant (i.e. allow more than one
 219         // enumeration on one and the same object simultaneously). Of course,
 220         // the "cookie" passed to GetFirstChild() and GetNextChild() should be
 221         // the same!
 222
 223         // get the first child of this item
 224     wxTreeItemId GetFirstChild(const wxTreeItemId& item,
 225                                wxTreeItemIdValue& cookie) const;
 226         // get the next child
 227     wxTreeItemId GetNextChild(const wxTreeItemId& item,
 228                               wxTreeItemIdValue& cookie) const;
 229         // get the last child of this item - this method doesn't use cookies
 230     wxTreeItemId GetLastChild(const wxTreeItemId& item) const;
 231
 232         // get the next sibling of this item
 233     wxTreeItemId GetNextSibling(const wxTreeItemId& item) const;
 234         // get the previous sibling
 235     wxTreeItemId GetPrevSibling(const wxTreeItemId& item) const;
 236
 237         // get first visible item
 238     wxTreeItemId GetFirstVisibleItem() const;
 239         // get the next visible item: item must be visible itself!
 240         // see IsVisible() and wxTreeCtrl::GetFirstVisibleItem()
 241     wxTreeItemId GetNextVisible(const wxTreeItemId& item) const;
 242         // get the previous visible item: item must be visible itself!
 243     wxTreeItemId GetPrevVisible(const wxTreeItemId& item) const;
 244
 245         // Only for internal use right now, but should probably be public
 246     wxTreeItemId GetNext(const wxTreeItemId& item) const;
 247
 248     // operations
 249     // ----------
 250
 251         // add the root node to the tree
 252     wxTreeItemId AddRoot(const wxString& text,
 253                          int image = -1, int selectedImage = -1,
 254                          wxTreeItemData *data = NULL);
 255
 256         // insert a new item in as the first child of the parent
 257     wxTreeItemId PrependItem(const wxTreeItemId& parent,
 258                              const wxString& text,
 259                              int image = -1, int selectedImage = -1,
 260                              wxTreeItemData *data = NULL);
 261
 262         // insert a new item after a given one
 263     wxTreeItemId InsertItem(const wxTreeItemId& parent,
 264                             const wxTreeItemId& idPrevious,
 265                             const wxString& text,
 266                             int image = -1, int selectedImage = -1,
 267                             wxTreeItemData *data = NULL);
 268
 269         // insert a new item before the one with the given index
 270     wxTreeItemId InsertItem(const wxTreeItemId& parent,
 271                             size_t index,
 272                             const wxString& text,
 273                             int image = -1, int selectedImage = -1,
 274                             wxTreeItemData *data = NULL);
 275
 276         // insert a new item in as the last child of the parent
 277     wxTreeItemId AppendItem(const wxTreeItemId& parent,
 278                             const wxString& text,
 279                             int image = -1, int selectedImage = -1,
 280                             wxTreeItemData *data = NULL);
 281
 282         // delete this item and associated data if any
 283     void Delete(const wxTreeItemId& item);
 284         // delete all children (but don't delete the item itself)
 285         // NB: this won't send wxEVT_COMMAND_TREE_ITEM_DELETED events
 286     void DeleteChildren(const wxTreeItemId& item);
 287         // delete all items from the tree
 288         // NB: this won't send wxEVT_COMMAND_TREE_ITEM_DELETED events
 289     void DeleteAllItems();
 290
 291         // expand this item
 292     void Expand(const wxTreeItemId& item);
 293         // expand this item and all subitems recursively
 294     void ExpandAll(const wxTreeItemId& item);
 295         // collapse the item without removing its children
 296     void Collapse(const wxTreeItemId& item);
 297         // collapse the item and remove all children
 298     void CollapseAndReset(const wxTreeItemId& item);
 299         // toggles the current state
 300     void Toggle(const wxTreeItemId& item);
 301
 302         // remove the selection from currently selected item (if any)
 303     void Unselect();
 304         // or from the given one (multiselect mode only)
 305     void UnselectItem(const wxTreeItemId& item) { SelectItem(item, false); }
 306         // or from all
 307     void UnselectAll();
 308         // select this item
 309     void SelectItem(const wxTreeItemId& item, bool select = true);
 310         // toggle the item selection
 311     void ToggleItemSelection(const wxTreeItemId& item)
 312     {
 313         SelectItem(item, !IsSelected(item));
 314     }
 315
 316         // make sure this item is visible (expanding the parent item and/or
 317         // scrolling to this item if necessary)
 318     void EnsureVisible(const wxTreeItemId& item);
 319         // scroll to this item (but don't expand its parent)
 320     void ScrollTo(const wxTreeItemId& item);
 321     void AdjustMyScrollbars();
 322
 323         // The first function is more portable (because easier to implement
 324         // on other platforms), but the second one returns some extra info.
 325     wxTreeItemId HitTest(const wxPoint& point)
 326         { int dummy; return HitTest(point, dummy); }
 327     wxTreeItemId HitTest(const wxPoint& point, int& flags);
 328
 329         // get the bounding rectangle of the item (or of its label only)
 330     bool GetBoundingRect(const wxTreeItemId& item,
 331                          wxRect& rect,
 332                          bool textOnly = FALSE) const;
 333
 334         // Start editing the item label: this (temporarily) replaces the item
 335         // with a one line edit control. The item will be selected if it hadn't
 336         // been before.
 337     void EditLabel( const wxTreeItemId& item ) { Edit( item ); }
 338     void Edit( const wxTreeItemId& item );
 339         // returns a pointer to the text edit control if the item is being
 340         // edited, NULL otherwise (it's assumed that no more than one item may
 341         // be edited simultaneously)
 342     wxTextCtrl* GetEditControl() const;
 343
 344     // sorting
 345         // this function is called to compare 2 items and should return -1, 0
 346         // or +1 if the first item is less than, equal to or greater than the
 347         // second one. The base class version performs alphabetic comparaison
 348         // of item labels (GetText)
 349     virtual int OnCompareItems(const wxTreeItemId& item1,
 350                                const wxTreeItemId& item2);
 351         // sort the children of this item using OnCompareItems
 352         //
 353         // NB: this function is not reentrant and not MT-safe (FIXME)!
 354     void SortChildren(const wxTreeItemId& item);
 355
 356 #if WXWIN_COMPATIBILITY_2_4
 357     // deprecated functions: use Set/GetItemImage directly
 358     int GetItemSelectedImage(const wxTreeItemId& item) const
 359         { return GetItemImage(item, wxTreeItemIcon_Selected); }
 360     void SetItemSelectedImage(const wxTreeItemId& item, int image)
 361         { SetItemImage(item, image, wxTreeItemIcon_Selected); }
 362
 363     // use the versions taking wxTreeItemIdValue cookies (note that
 364     // GetNextChild() is not inside wxDEPRECATED on purpose, as otherwise we
 365     // get twice as many warnings without any added benefit: it is always used
 366     // with GetFirstChild() anyhow)
 367     wxDEPRECATED( wxTreeItemId GetFirstChild(const wxTreeItemId& item,
 368                                              long& cookie) const );
 369     wxTreeItemId GetNextChild(const wxTreeItemId& item,
 370                               long& cookie) const;
 371 #endif // WXWIN_COMPATIBILITY_2_4
 372
 373     virtual bool ShouldInheritColours() const { return false; }
 374
 375     // implementation only from now on
 376
 377     // overridden base class virtuals
 378     virtual bool SetBackgroundColour(const wxColour& colour);
 379     virtual bool SetForegroundColour(const wxColour& colour);
 380
 381     // callbacks
 382     void OnPaint( wxPaintEvent &event );
 383     void OnSetFocus( wxFocusEvent &event );
 384     void OnKillFocus( wxFocusEvent &event );
 385     void OnChar( wxKeyEvent &event );
 386     void OnMouse( wxMouseEvent &event );
 387     void OnInternalIdle( );
 388
 389     // implementation helpers
 390 protected:
 391     friend class wxGenericTreeItem;
 392     friend class wxTreeRenameTimer;
 393     friend class wxTreeFindTimer;
 394     friend class wxTreeTextCtrl;
 395
 396     wxFont               m_normalFont;
 397     wxFont               m_boldFont;
 398
 399     wxGenericTreeItem   *m_anchor;
 400     wxGenericTreeItem   *m_current,
 401                         *m_key_current,
 402                         // A hint to select a parent item after deleting a child
 403                         *m_select_me;
 404     unsigned short       m_indent;
 405     unsigned short       m_spacing;
 406     int                  m_lineHeight;
 407     wxPen                m_dottedPen;
 408     wxBrush             *m_hilightBrush,
 409                         *m_hilightUnfocusedBrush;
 410     bool                 m_hasFocus;
 411     bool                 m_dirty;
 412     bool                 m_ownsImageListNormal,
 413                          m_ownsImageListState,
 414                          m_ownsImageListButtons;
 415     bool                 m_isDragging; // true between BEGIN/END drag events
 416     bool                 m_lastOnSame;  // last click on the same item as prev
 417     wxImageList         *m_imageListNormal,
 418                         *m_imageListState,
 419                         *m_imageListButtons;
 420
 421     int                  m_dragCount;
 422     wxPoint              m_dragStart;
 423     wxGenericTreeItem   *m_dropTarget;
 424     wxCursor             m_oldCursor;  // cursor is changed while dragging
 425     wxGenericTreeItem   *m_oldSelection;
 426     wxGenericTreeItem   *m_underMouse; // for visual effects
 427     wxTreeTextCtrl      *m_textCtrl;
 428
 429     wxTimer             *m_renameTimer;
 430
 431     // incremental search data
 432     wxString             m_findPrefix;
 433     wxTimer             *m_findTimer;
 434
 435     // the common part of all ctors
 436     void Init();
 437
 438     // misc helpers
 439     void SendDeleteEvent(wxGenericTreeItem *itemBeingDeleted);
 440
 441     void DrawBorder(const wxTreeItemId& item);
 442     void DrawLine(const wxTreeItemId& item, bool below);
 443     void DrawDropEffect(wxGenericTreeItem *item);
 444
 445     void DoSelectItem(const wxTreeItemId& id,
 446                       bool unselect_others = TRUE,
 447                       bool extended_select = FALSE);
 448
 449     wxTreeItemId DoInsertItem(const wxTreeItemId& parent,
 450                               size_t previous,
 451                               const wxString& text,
 452                               int image, int selectedImage,
 453                               wxTreeItemData *data);
 454
 455     // called by wxTextTreeCtrl when it marks itself for deletion
 456     void ResetTextControl();
 457
 458     // find the first item starting with the given prefix after the given item
 459     wxTreeItemId FindItem(const wxTreeItemId& id, const wxString& prefix) const;
 460
 461     bool HasButtons() const { return HasFlag(wxTR_HAS_BUTTONS); }
 462
 463     void CalculateLineHeight();
 464     int  GetLineHeight(wxGenericTreeItem *item) const;
 465     void PaintLevel( wxGenericTreeItem *item, wxDC& dc, int level, int &y );
 466     void PaintItem( wxGenericTreeItem *item, wxDC& dc);
 467
 468     void CalculateLevel( wxGenericTreeItem *item, wxDC &dc, int level, int &y );
 469     void CalculatePositions();
 470     void CalculateSize( wxGenericTreeItem *item, wxDC &dc );
 471
 472     void RefreshSubtree( wxGenericTreeItem *item );
 473     void RefreshLine( wxGenericTreeItem *item );
 474
 475     // redraw all selected items
 476     void RefreshSelected();
 477
 478     // RefreshSelected() recursive helper
 479     void RefreshSelectedUnder(wxGenericTreeItem *item);
 480
 481     void OnRenameTimer();
 482     bool OnRenameAccept(wxGenericTreeItem *item, const wxString& value);
 483     void OnRenameCancelled(wxGenericTreeItem *item);
 484
 485     void FillArray(wxGenericTreeItem*, wxArrayTreeItemIds&) const;
 486     void SelectItemRange( wxGenericTreeItem *item1, wxGenericTreeItem *item2 );
 487     bool TagAllChildrenUntilLast(wxGenericTreeItem *crt_item, wxGenericTreeItem *last_item, bool select);
 488     bool TagNextChildren(wxGenericTreeItem *crt_item, wxGenericTreeItem *last_item, bool select);
 489     void UnselectAllChildren( wxGenericTreeItem *item );
 490
 491 private:
 492     DECLARE_EVENT_TABLE()
 493     DECLARE_DYNAMIC_CLASS(wxGenericTreeCtrl)
 494     DECLARE_NO_COPY_CLASS(wxGenericTreeCtrl)
 495 };
 496
 497 #if !defined(__WXMSW__) || defined(__WIN16__) || defined(__WXUNIVERSAL__)
 498 /*
 499  * wxTreeCtrl has to be a real class or we have problems with
 500  * the run-time information.
 501  */
 502
 503 class WXDLLEXPORT wxTreeCtrl: public wxGenericTreeCtrl
 504 {
 505     DECLARE_DYNAMIC_CLASS(wxTreeCtrl)
 506
 507 public:
 508     wxTreeCtrl() {}
 509
 510     wxTreeCtrl(wxWindow *parent, wxWindowID id = -1,
 511                const wxPoint& pos = wxDefaultPosition,
 512                const wxSize& size = wxDefaultSize,
 513                long style = wxTR_DEFAULT_STYLE,
 514                const wxValidator &validator = wxDefaultValidator,
 515                const wxString& name = wxTreeCtrlNameStr)
 516     : wxGenericTreeCtrl(parent, id, pos, size, style, validator, name)
 517     {
 518     }
 519 };
 520 #endif // !__WXMSW__ || __WIN16__ || __WXUNIVERSAL__
 521
 522 #endif // wxUSE_TREECTRL
 523
 524 #endif // _GENERIC_TREECTRL_H_
 525