include/wx/generic/treectlg.h

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        treectrl.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 license
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 #ifndef _GENERIC_TREECTRL_H_
  13 #define _GENERIC_TREECTRL_H_
  14
  15 #ifdef __GNUG__
  16     #pragma interface "treectlg.h"
  17 #endif
  18
  19 #if wxUSE_TREECTRL
  20
  21 #include "wx/scrolwin.h"
  22 #include "wx/pen.h"
  23
  24 // -----------------------------------------------------------------------------
  25 // forward declaration
  26 // -----------------------------------------------------------------------------
  27
  28 class WXDLLEXPORT wxImageList;
  29 class WXDLLEXPORT wxGenericTreeItem;
  30
  31 class WXDLLEXPORT wxTreeItemData;
  32
  33 class WXDLLEXPORT wxTreeRenameTimer;
  34 class WXDLLEXPORT wxTreeTextCtrl;
  35
  36 // -----------------------------------------------------------------------------
  37 // wxGenericTreeCtrl - the tree control
  38 // -----------------------------------------------------------------------------
  39
  40 class WXDLLEXPORT wxGenericTreeCtrl : public wxScrolledWindow
  41 {
  42 public:
  43     // creation
  44     // --------
  45     wxGenericTreeCtrl() { Init(); }
  46
  47     wxGenericTreeCtrl(wxWindow *parent, wxWindowID id = -1,
  48                const wxPoint& pos = wxDefaultPosition,
  49                const wxSize& size = wxDefaultSize,
  50                long style = wxTR_DEFAULT_STYLE,
  51                const wxValidator &validator = wxDefaultValidator,
  52                const wxString& name = wxTreeCtrlNameStr)
  53     {
  54         Init();
  55         Create(parent, id, pos, size, style, validator, name);
  56     }
  57
  58     virtual ~wxGenericTreeCtrl();
  59
  60     bool Create(wxWindow *parent, wxWindowID id = -1,
  61                 const wxPoint& pos = wxDefaultPosition,
  62                 const wxSize& size = wxDefaultSize,
  63                 long style = wxTR_DEFAULT_STYLE,
  64                 const wxValidator &validator = wxDefaultValidator,
  65                 const wxString& name = wxTreeCtrlNameStr);
  66
  67     // accessors
  68     // ---------
  69
  70         // get the total number of items in the control
  71     size_t GetCount() const;
  72
  73         // indent is the number of pixels the children are indented relative to
  74         // the parents position. SetIndent() also redraws the control
  75         // immediately.
  76     unsigned int GetIndent() const { return m_indent; }
  77     void SetIndent(unsigned int indent);
  78
  79         // spacing is the number of pixels between the start and the Text
  80     unsigned int GetSpacing() const { return m_spacing; }
  81     void SetSpacing(unsigned int spacing);
  82
  83         // image list: these functions allow to associate an image list with
  84         // the control and retrieve it. Note that when assigned with
  85         // SetImageList, the control does _not_ delete
  86         // the associated image list when it's deleted in order to allow image
  87         // lists to be shared between different controls. If you use
  88         // AssignImageList, the control _does_ delete the image list.
  89         //
  90         // The normal image list is for the icons which correspond to the
  91         // normal tree item state (whether it is selected or not).
  92         // Additionally, the application might choose to show a state icon
  93         // which corresponds to an app-defined item state (for example,
  94         // checked/unchecked) which are taken from the state image list.
  95     wxImageList *GetImageList() const;
  96     wxImageList *GetStateImageList() const;
  97     wxImageList *GetButtonsImageList() const;
  98
  99     void SetImageList(wxImageList *imageList);
 100     void SetStateImageList(wxImageList *imageList);
 101     void SetButtonsImageList(wxImageList *imageList);
 102     void AssignImageList(wxImageList *imageList);
 103     void AssignStateImageList(wxImageList *imageList);
 104     void AssignButtonsImageList(wxImageList *imageList);
 105
 106     // Functions to work with tree ctrl items.
 107
 108     // accessors
 109     // ---------
 110
 111         // retrieve item's label
 112     wxString GetItemText(const wxTreeItemId& item) const;
 113         // get one of the images associated with the item (normal by default)
 114     int GetItemImage(const wxTreeItemId& item,
 115                      wxTreeItemIcon which = wxTreeItemIcon_Normal) const;
 116         // get the data associated with the item
 117     wxTreeItemData *GetItemData(const wxTreeItemId& item) const;
 118
 119     // modifiers
 120     // ---------
 121
 122         // set item's label
 123     void SetItemText(const wxTreeItemId& item, const wxString& text);
 124         // get one of the images associated with the item (normal by default)
 125     void SetItemImage(const wxTreeItemId& item, int image,
 126                       wxTreeItemIcon which = wxTreeItemIcon_Normal);
 127         // associate some data with the item
 128     void SetItemData(const wxTreeItemId& item, wxTreeItemData *data);
 129
 130         // force appearance of [+] button near the item. This is useful to
 131         // allow the user to expand the items which don't have any children now
 132         // - but instead add them only when needed, thus minimizing memory
 133         // usage and loading time.
 134     void SetItemHasChildren(const wxTreeItemId& item, bool has = TRUE);
 135
 136         // the item will be shown in bold
 137     void SetItemBold(const wxTreeItemId& item, bool bold = TRUE);
 138
 139         // set the item's text colour
 140     void SetItemTextColour(const wxTreeItemId& item, const wxColour& col);
 141
 142         // set the item's background colour
 143     void SetItemBackgroundColour(const wxTreeItemId& item, const wxColour& col);
 144
 145         // set the item's font (should be of the same height for all items)
 146     void SetItemFont(const wxTreeItemId& item, const wxFont& font);
 147
 148         // set the window font
 149     virtual bool SetFont( const wxFont &font );
 150
 151        // set the styles.  No need to specify a GetWindowStyle here since
 152        // the base wxWindow member function will do it for us
 153     void SetWindowStyle(const long styles);
 154
 155     // item status inquiries
 156     // ---------------------
 157
 158         // is the item visible (it might be outside the view or not expanded)?
 159     bool IsVisible(const wxTreeItemId& item) const;
 160         // does the item has any children?
 161     bool HasChildren(const wxTreeItemId& item) const
 162       { return ItemHasChildren(item); }
 163     bool ItemHasChildren(const wxTreeItemId& item) const;
 164         // is the item expanded (only makes sense if HasChildren())?
 165     bool IsExpanded(const wxTreeItemId& item) const;
 166         // is this item currently selected (the same as has focus)?
 167     bool IsSelected(const wxTreeItemId& item) const;
 168         // is item text in bold font?
 169     bool IsBold(const wxTreeItemId& item) const;
 170         // does the layout include space for a button?
 171
 172     // number of children
 173     // ------------------
 174
 175         // if 'recursively' is FALSE, only immediate children count, otherwise
 176         // the returned number is the number of all items in this branch
 177     size_t GetChildrenCount(const wxTreeItemId& item, bool recursively = TRUE);
 178
 179     // navigation
 180     // ----------
 181
 182     // wxTreeItemId.IsOk() will return FALSE if there is no such item
 183
 184         // get the root tree item
 185     wxTreeItemId GetRootItem() const { return m_anchor; }
 186
 187         // get the item currently selected (may return NULL if no selection)
 188     wxTreeItemId GetSelection() const { return m_current; }
 189
 190         // get the items currently selected, return the number of such item
 191     size_t GetSelections(wxArrayTreeItemIds&) const;
 192
 193         // get the parent of this item (may return NULL if root)
 194     wxTreeItemId GetParent(const wxTreeItemId& item) const;
 195
 196         // for this enumeration function you must pass in a "cookie" parameter
 197         // which is opaque for the application but is necessary for the library
 198         // to make these functions reentrant (i.e. allow more than one
 199         // enumeration on one and the same object simultaneously). Of course,
 200         // the "cookie" passed to GetFirstChild() and GetNextChild() should be
 201         // the same!
 202
 203         // get the first child of this item
 204     wxTreeItemId GetFirstChild(const wxTreeItemId& item, long& cookie) const;
 205         // get the next child
 206     wxTreeItemId GetNextChild(const wxTreeItemId& item, long& cookie) const;
 207         // get the last child of this item - this method doesn't use cookies
 208     wxTreeItemId GetLastChild(const wxTreeItemId& item) const;
 209
 210         // get the next sibling of this item
 211     wxTreeItemId GetNextSibling(const wxTreeItemId& item) const;
 212         // get the previous sibling
 213     wxTreeItemId GetPrevSibling(const wxTreeItemId& item) const;
 214
 215         // get first visible item
 216     wxTreeItemId GetFirstVisibleItem() const;
 217         // get the next visible item: item must be visible itself!
 218         // see IsVisible() and wxTreeCtrl::GetFirstVisibleItem()
 219     wxTreeItemId GetNextVisible(const wxTreeItemId& item) const;
 220         // get the previous visible item: item must be visible itself!
 221     wxTreeItemId GetPrevVisible(const wxTreeItemId& item) const;
 222
 223         // Only for internal use right now, but should probably be public
 224     wxTreeItemId GetNext(const wxTreeItemId& item) const;
 225
 226     // operations
 227     // ----------
 228
 229         // add the root node to the tree
 230     wxTreeItemId AddRoot(const wxString& text,
 231                          int image = -1, int selectedImage = -1,
 232                          wxTreeItemData *data = NULL);
 233
 234         // insert a new item in as the first child of the parent
 235     wxTreeItemId PrependItem(const wxTreeItemId& parent,
 236                              const wxString& text,
 237                              int image = -1, int selectedImage = -1,
 238                              wxTreeItemData *data = NULL);
 239
 240         // insert a new item after a given one
 241     wxTreeItemId InsertItem(const wxTreeItemId& parent,
 242                             const wxTreeItemId& idPrevious,
 243                             const wxString& text,
 244                             int image = -1, int selectedImage = -1,
 245                             wxTreeItemData *data = NULL);
 246
 247         // insert a new item before the one with the given index
 248     wxTreeItemId InsertItem(const wxTreeItemId& parent,
 249                             size_t index,
 250                             const wxString& text,
 251                             int image = -1, int selectedImage = -1,
 252                             wxTreeItemData *data = NULL);
 253
 254         // insert a new item in as the last child of the parent
 255     wxTreeItemId AppendItem(const wxTreeItemId& parent,
 256                             const wxString& text,
 257                             int image = -1, int selectedImage = -1,
 258                             wxTreeItemData *data = NULL);
 259
 260         // delete this item and associated data if any
 261     void Delete(const wxTreeItemId& item);
 262         // delete all children (but don't delete the item itself)
 263         // NB: this won't send wxEVT_COMMAND_TREE_ITEM_DELETED events
 264     void DeleteChildren(const wxTreeItemId& item);
 265         // delete all items from the tree
 266         // NB: this won't send wxEVT_COMMAND_TREE_ITEM_DELETED events
 267     void DeleteAllItems();
 268
 269         // expand this item
 270     void Expand(const wxTreeItemId& item);
 271         // expand this item and all subitems recursively
 272     void ExpandAll(const wxTreeItemId& item);
 273         // collapse the item without removing its children
 274     void Collapse(const wxTreeItemId& item);
 275         // collapse the item and remove all children
 276     void CollapseAndReset(const wxTreeItemId& item);
 277         // toggles the current state
 278     void Toggle(const wxTreeItemId& item);
 279
 280         // remove the selection from currently selected item (if any)
 281     void Unselect();
 282     void UnselectAll();
 283         // select this item
 284     void SelectItem(const wxTreeItemId& item, bool unselect_others=TRUE, bool extended_select=FALSE);
 285         // make sure this item is visible (expanding the parent item and/or
 286         // scrolling to this item if necessary)
 287     void EnsureVisible(const wxTreeItemId& item);
 288         // scroll to this item (but don't expand its parent)
 289     void ScrollTo(const wxTreeItemId& item);
 290     void AdjustMyScrollbars();
 291
 292         // The first function is more portable (because easier to implement
 293         // on other platforms), but the second one returns some extra info.
 294     wxTreeItemId HitTest(const wxPoint& point)
 295         { int dummy; return HitTest(point, dummy); }
 296     wxTreeItemId HitTest(const wxPoint& point, int& flags);
 297
 298         // get the bounding rectangle of the item (or of its label only)
 299     bool GetBoundingRect(const wxTreeItemId& item,
 300                          wxRect& rect,
 301                          bool textOnly = FALSE) const;
 302
 303         // Start editing the item label: this (temporarily) replaces the item
 304         // with a one line edit control. The item will be selected if it hadn't
 305         // been before.
 306     void EditLabel( const wxTreeItemId& item ) { Edit( item ); }
 307     void Edit( const wxTreeItemId& item );
 308
 309     // sorting
 310         // this function is called to compare 2 items and should return -1, 0
 311         // or +1 if the first item is less than, equal to or greater than the
 312         // second one. The base class version performs alphabetic comparaison
 313         // of item labels (GetText)
 314     virtual int OnCompareItems(const wxTreeItemId& item1,
 315                                const wxTreeItemId& item2);
 316         // sort the children of this item using OnCompareItems
 317         //
 318         // NB: this function is not reentrant and not MT-safe (FIXME)!
 319     void SortChildren(const wxTreeItemId& item);
 320
 321     // deprecated functions: use Set/GetItemImage directly
 322         // get the selected item image
 323     int GetItemSelectedImage(const wxTreeItemId& item) const
 324         { return GetItemImage(item, wxTreeItemIcon_Selected); }
 325         // set the selected item image
 326     void SetItemSelectedImage(const wxTreeItemId& item, int image)
 327         { SetItemImage(item, image, wxTreeItemIcon_Selected); }
 328
 329     // implementation only from now on
 330
 331     // overridden base class virtuals
 332     virtual bool SetBackgroundColour(const wxColour& colour);
 333     virtual bool SetForegroundColour(const wxColour& colour);
 334
 335     // callbacks
 336     void OnPaint( wxPaintEvent &event );
 337     void OnSetFocus( wxFocusEvent &event );
 338     void OnKillFocus( wxFocusEvent &event );
 339     void OnChar( wxKeyEvent &event );
 340     void OnMouse( wxMouseEvent &event );
 341     void OnIdle( wxIdleEvent &event );
 342
 343     // implementation helpers
 344     void SendDeleteEvent(wxGenericTreeItem *itemBeingDeleted);
 345
 346     void DrawBorder(const wxTreeItemId& item);
 347     void DrawLine(const wxTreeItemId& item, bool below);
 348
 349 protected:
 350     friend class wxGenericTreeItem;
 351     friend class wxTreeRenameTimer;
 352     friend class wxTreeTextCtrl;
 353
 354     wxFont               m_normalFont;
 355     wxFont               m_boldFont;
 356
 357     wxGenericTreeItem   *m_anchor;
 358     wxGenericTreeItem   *m_current, *m_key_current, *m_currentEdit;
 359     unsigned short       m_indent;
 360     unsigned short       m_spacing;
 361     int                  m_lineHeight;
 362     wxPen                m_dottedPen;
 363     wxBrush             *m_hilightBrush,
 364                         *m_hilightUnfocusedBrush;
 365     bool                 m_hasFocus;
 366     bool                 m_dirty;
 367     bool                 m_ownsImageListNormal,
 368                          m_ownsImageListState,
 369                          m_ownsImageListButtons;
 370     bool                 m_isDragging; // true between BEGIN/END drag events
 371     bool                 m_renameAccept;
 372     bool                 m_lastOnSame;  // last click on the same item as prev
 373     wxImageList         *m_imageListNormal,
 374                         *m_imageListState,
 375                         *m_imageListButtons;
 376
 377     int                  m_dragCount;
 378     wxPoint              m_dragStart;
 379     wxGenericTreeItem   *m_dropTarget;
 380     wxCursor             m_oldCursor;  // cursor is changed while dragging
 381     wxGenericTreeItem   *m_oldSelection;
 382
 383     wxTimer             *m_renameTimer;
 384     wxString             m_renameRes;
 385
 386     // the common part of all ctors
 387     void Init();
 388
 389     // misc helpers
 390     wxTreeItemId DoInsertItem(const wxTreeItemId& parent,
 391                               size_t previous,
 392                               const wxString& text,
 393                               int image, int selectedImage,
 394                               wxTreeItemData *data);
 395     bool HasButtons(void) const
 396         { return (m_imageListButtons != NULL)
 397               || HasFlag(wxTR_TWIST_BUTTONS|wxTR_HAS_BUTTONS); }
 398
 399 protected:
 400     void CalculateLineHeight();
 401     int  GetLineHeight(wxGenericTreeItem *item) const;
 402     void PaintLevel( wxGenericTreeItem *item, wxDC& dc, int level, int &y );
 403     void PaintItem( wxGenericTreeItem *item, wxDC& dc);
 404
 405     void CalculateLevel( wxGenericTreeItem *item, wxDC &dc, int level, int &y );
 406     void CalculatePositions();
 407     void CalculateSize( wxGenericTreeItem *item, wxDC &dc );
 408
 409     void RefreshSubtree( wxGenericTreeItem *item );
 410     void RefreshLine( wxGenericTreeItem *item );
 411
 412     // redraw all selected items
 413     void RefreshSelected();
 414
 415     // RefreshSelected() recursive helper
 416     void RefreshSelectedUnder(wxGenericTreeItem *item);
 417
 418     void OnRenameTimer();
 419     void OnRenameAccept();
 420
 421     void FillArray(wxGenericTreeItem*, wxArrayTreeItemIds&) const;
 422     void SelectItemRange( wxGenericTreeItem *item1, wxGenericTreeItem *item2 );
 423     bool TagAllChildrenUntilLast(wxGenericTreeItem *crt_item, wxGenericTreeItem *last_item, bool select);
 424     bool TagNextChildren(wxGenericTreeItem *crt_item, wxGenericTreeItem *last_item, bool select);
 425     void UnselectAllChildren( wxGenericTreeItem *item );
 426
 427     void DrawDropEffect(wxGenericTreeItem *item);
 428
 429 private:
 430     DECLARE_EVENT_TABLE()
 431     DECLARE_DYNAMIC_CLASS(wxGenericTreeCtrl)
 432 };
 433
 434 #if !defined(__WXMSW__) || defined(__WIN16__) || defined(__WXUNIVERSAL__)
 435 /*
 436  * wxTreeCtrl has to be a real class or we have problems with
 437  * the run-time information.
 438  */
 439
 440 class WXDLLEXPORT wxTreeCtrl: public wxGenericTreeCtrl
 441 {
 442     DECLARE_DYNAMIC_CLASS(wxTreeCtrl)
 443
 444 public:
 445     wxTreeCtrl() {}
 446
 447     wxTreeCtrl(wxWindow *parent, wxWindowID id = -1,
 448                const wxPoint& pos = wxDefaultPosition,
 449                const wxSize& size = wxDefaultSize,
 450                long style = wxTR_DEFAULT_STYLE,
 451                const wxValidator &validator = wxDefaultValidator,
 452                const wxString& name = wxTreeCtrlNameStr)
 453     : wxGenericTreeCtrl(parent, id, pos, size, style, validator, name)
 454     {
 455     }
 456 };
 457 #endif // !__WXMSW__ || __WIN16__ || __WXUNIVERSAL__
 458
 459 #endif // wxUSE_TREECTRL
 460
 461 #endif // _GENERIC_TREECTRL_H_
 462