include/wx/msw/treectrl.h

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        wx/msw/treectrl.h
   3 // Purpose:     wxTreeCtrl class
   4 // Author:      Julian Smart
   5 // Modified by: Vadim Zeitlin to be less MSW-specific on 10/10/98
   6 // Created:     01/02/97
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) Julian Smart
   9 // Licence:     wxWindows licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 #ifndef _WX_TREECTRL_H_
  13 #define _WX_TREECTRL_H_
  14
  15 // ----------------------------------------------------------------------------
  16 // headers
  17 // ----------------------------------------------------------------------------
  18
  19 #if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
  20     #pragma interface "treectrl.h"
  21 #endif
  22
  23 #if wxUSE_TREECTRL
  24
  25 #include "wx/textctrl.h"
  26 #include "wx/dynarray.h"
  27 #include "wx/treebase.h"
  28 #include "wx/hashmap.h"
  29
  30 #ifdef __GNUWIN32__
  31     // Cygwin windows.h defines these identifiers
  32     #undef GetFirstChild
  33     #undef GetNextSibling
  34 #endif // Cygwin
  35
  36 // fwd decl
  37 class  WXDLLEXPORT wxImageList;
  38 class  WXDLLEXPORT wxDragImage;
  39 struct WXDLLEXPORT wxTreeViewItem;
  40
  41 // NB: all the following flags are for compatbility only and will be removed in the
  42 //     next versions
  43
  44 // flags for deprecated `Expand(int action)'
  45 enum
  46 {
  47     wxTREE_EXPAND_EXPAND,
  48     wxTREE_EXPAND_COLLAPSE,
  49     wxTREE_EXPAND_COLLAPSE_RESET,
  50     wxTREE_EXPAND_TOGGLE
  51 };
  52
  53 // flags for deprecated InsertItem() variant (their values are the same as of
  54 // TVI_FIRST and TVI_LAST)
  55 #define wxTREE_INSERT_FIRST 0xFFFF0001
  56 #define wxTREE_INSERT_LAST  0xFFFF0002
  57
  58 // hash storing attributes for our items
  59 WX_DECLARE_EXPORTED_VOIDPTR_HASH_MAP(wxTreeItemAttr *, wxMapTreeAttr);
  60
  61 // ----------------------------------------------------------------------------
  62 // wxTreeCtrl
  63 // ----------------------------------------------------------------------------
  64
  65 class WXDLLEXPORT wxTreeCtrl : public wxControl
  66 {
  67 public:
  68     // creation
  69     // --------
  70     wxTreeCtrl() { Init(); }
  71
  72     wxTreeCtrl(wxWindow *parent, wxWindowID id = wxID_ANY,
  73                const wxPoint& pos = wxDefaultPosition,
  74                const wxSize& size = wxDefaultSize,
  75                long style = wxTR_HAS_BUTTONS | wxTR_LINES_AT_ROOT,
  76                const wxValidator& validator = wxDefaultValidator,
  77                const wxString& name = wxTreeCtrlNameStr)
  78     {
  79         Create(parent, id, pos, size, style, validator, name);
  80     }
  81
  82     virtual ~wxTreeCtrl();
  83
  84     bool Create(wxWindow *parent, wxWindowID id = wxID_ANY,
  85                 const wxPoint& pos = wxDefaultPosition,
  86                 const wxSize& size = wxDefaultSize,
  87                 long style = wxTR_HAS_BUTTONS | wxTR_LINES_AT_ROOT,
  88                 const wxValidator& validator = wxDefaultValidator,
  89                 const wxString& name = wxTreeCtrlNameStr);
  90
  91     // accessors
  92     // ---------
  93
  94         // get the total number of items in the control
  95     size_t GetCount() const;
  96
  97         // indent is the number of pixels the children are indented relative to
  98         // the parents position. SetIndent() also redraws the control
  99         // immediately.
 100     unsigned int GetIndent() const;
 101     void SetIndent(unsigned int indent);
 102
 103     // spacing is the number of pixels between the start and the Text
 104         // not implemented under wxMSW
 105     unsigned int GetSpacing() const { return 18; } // return wxGTK default
 106     void SetSpacing(unsigned int WXUNUSED(spacing)) { }
 107
 108         // image list: these functions allow to associate an image list with
 109         // the control and retrieve it. Note that the control does _not_ delete
 110         // the associated image list when it's deleted in order to allow image
 111         // lists to be shared between different controls.
 112         //
 113         // The normal image list is for the icons which correspond to the
 114         // normal tree item state (whether it is selected or not).
 115         // Additionally, the application might choose to show a state icon
 116         // which corresponds to an app-defined item state (for example,
 117         // checked/unchecked) which are taken from the state image list.
 118     virtual wxImageList *GetImageList() const;
 119     virtual wxImageList *GetStateImageList() const;
 120
 121     virtual void SetImageList(wxImageList *imageList);
 122     virtual void SetStateImageList(wxImageList *imageList);
 123     virtual void AssignImageList(wxImageList *imageList);
 124     virtual void AssignStateImageList(wxImageList *imageList);
 125
 126     // Functions to work with tree ctrl items. Unfortunately, they can _not_ be
 127     // member functions of wxTreeItem because they must know the tree the item
 128     // belongs to for Windows implementation and storing the pointer to
 129     // wxTreeCtrl in each wxTreeItem is just too much waste.
 130
 131     // accessors
 132     // ---------
 133
 134         // retrieve items label
 135     wxString GetItemText(const wxTreeItemId& item) const;
 136         // get one of the images associated with the item (normal by default)
 137     virtual int GetItemImage(const wxTreeItemId& item,
 138                      wxTreeItemIcon which = wxTreeItemIcon_Normal) const;
 139         // get the data associated with the item
 140     wxTreeItemData *GetItemData(const wxTreeItemId& item) const;
 141
 142         // get the item's text colour
 143     wxColour GetItemTextColour(const wxTreeItemId& item) const;
 144
 145         // get the item's background colour
 146     wxColour GetItemBackgroundColour(const wxTreeItemId& item) const;
 147
 148         // get the item's font
 149     wxFont GetItemFont(const wxTreeItemId& item) const;
 150
 151     // modifiers
 152     // ---------
 153
 154         // set items label
 155     void SetItemText(const wxTreeItemId& item, const wxString& text);
 156         // get one of the images associated with the item (normal by default)
 157     virtual void SetItemImage(const wxTreeItemId& item, int image,
 158                       wxTreeItemIcon which = wxTreeItemIcon_Normal);
 159         // associate some data with the item
 160     void SetItemData(const wxTreeItemId& item, wxTreeItemData *data);
 161
 162         // force appearance of [+] button near the item. This is useful to
 163         // allow the user to expand the items which don't have any children now
 164         // - but instead add them only when needed, thus minimizing memory
 165         // usage and loading time.
 166     void SetItemHasChildren(const wxTreeItemId& item, bool has = true);
 167
 168         // the item will be shown in bold
 169     void SetItemBold(const wxTreeItemId& item, bool bold = true);
 170
 171         // the item will be shown with a drop highlight
 172     void SetItemDropHighlight(const wxTreeItemId& item, bool highlight = true);
 173
 174         // set the items text colour
 175     void SetItemTextColour(const wxTreeItemId& item, const wxColour& col);
 176
 177         // set the items background colour
 178     void SetItemBackgroundColour(const wxTreeItemId& item, const wxColour& col);
 179
 180         // set the items font (should be of the same height for all items)
 181     void SetItemFont(const wxTreeItemId& item, const wxFont& font);
 182
 183     // item status inquiries
 184     // ---------------------
 185
 186         // is the item visible (it might be outside the view or not expanded)?
 187     bool IsVisible(const wxTreeItemId& item) const;
 188         // does the item has any children?
 189     bool ItemHasChildren(const wxTreeItemId& item) const;
 190         // is the item expanded (only makes sense if HasChildren())?
 191     bool IsExpanded(const wxTreeItemId& item) const;
 192         // is this item currently selected (the same as has focus)?
 193     bool IsSelected(const wxTreeItemId& item) const;
 194         // is item text in bold font?
 195     bool IsBold(const wxTreeItemId& item) const;
 196
 197     // number of children
 198     // ------------------
 199
 200         // if 'recursively' is false, only immediate children count, otherwise
 201         // the returned number is the number of all items in this branch
 202     size_t GetChildrenCount(const wxTreeItemId& item,
 203                             bool recursively = true) const;
 204
 205     // navigation
 206     // ----------
 207
 208     // wxTreeItemId.IsOk() will return false if there is no such item
 209
 210         // get the root tree item
 211     wxTreeItemId GetRootItem() const;
 212
 213         // get the item currently selected (may return NULL if no selection)
 214     wxTreeItemId GetSelection() const;
 215
 216         // get the items currently selected, return the number of such item
 217         //
 218         // NB: this operation is expensive and can take a long time for a
 219         //     control with a lot of items (~ O(number of items)).
 220     size_t GetSelections(wxArrayTreeItemIds& selections) const;
 221
 222         // get the parent of this item (may return NULL if root)
 223     wxTreeItemId GetItemParent(const wxTreeItemId& item) const;
 224
 225 #if WXWIN_COMPATIBILITY_2_2
 226         // deprecated:  Use GetItemParent instead.
 227     wxTreeItemId GetParent(const wxTreeItemId& item) const
 228         { return GetItemParent( item ); }
 229
 230         // Expose the base class method hidden by the one above.
 231     wxWindow *GetParent() const { return wxControl::GetParent(); }
 232 #endif  // WXWIN_COMPATIBILITY_2_2
 233
 234         // for this enumeration function you must pass in a "cookie" parameter
 235         // which is opaque for the application but is necessary for the library
 236         // to make these functions reentrant (i.e. allow more than one
 237         // enumeration on one and the same object simultaneously). Of course,
 238         // the "cookie" passed to GetFirstChild() and GetNextChild() should be
 239         // the same!
 240
 241         // get the first child of this item
 242     wxTreeItemId GetFirstChild(const wxTreeItemId& item,
 243                                wxTreeItemIdValue& cookie) const;
 244         // get the next child
 245     wxTreeItemId GetNextChild(const wxTreeItemId& item,
 246                               wxTreeItemIdValue& cookie) const;
 247         // get the last child of this item - this method doesn't use cookies
 248     wxTreeItemId GetLastChild(const wxTreeItemId& item) const;
 249
 250         // get the next sibling of this item
 251     wxTreeItemId GetNextSibling(const wxTreeItemId& item) const;
 252         // get the previous sibling
 253     wxTreeItemId GetPrevSibling(const wxTreeItemId& item) const;
 254
 255         // get first visible item
 256     wxTreeItemId GetFirstVisibleItem() const;
 257         // get the next visible item: item must be visible itself!
 258         // see IsVisible() and wxTreeCtrl::GetFirstVisibleItem()
 259     wxTreeItemId GetNextVisible(const wxTreeItemId& item) const;
 260         // get the previous visible item: item must be visible itself!
 261     wxTreeItemId GetPrevVisible(const wxTreeItemId& item) const;
 262
 263     // operations
 264     // ----------
 265
 266         // add the root node to the tree
 267     virtual wxTreeItemId AddRoot(const wxString& text,
 268                          int image = -1, int selectedImage = -1,
 269                          wxTreeItemData *data = NULL);
 270
 271         // insert a new item in as the first child of the parent
 272     virtual wxTreeItemId PrependItem(const wxTreeItemId& parent,
 273                              const wxString& text,
 274                              int image = -1, int selectedImage = -1,
 275                              wxTreeItemData *data = NULL);
 276
 277         // insert a new item after a given one
 278     virtual wxTreeItemId InsertItem(const wxTreeItemId& parent,
 279                             const wxTreeItemId& idPrevious,
 280                             const wxString& text,
 281                             int image = -1, int selectedImage = -1,
 282                             wxTreeItemData *data = NULL);
 283
 284         // insert a new item before the one with the given index
 285     virtual wxTreeItemId InsertItem(const wxTreeItemId& parent,
 286                             size_t index,
 287                             const wxString& text,
 288                             int image = -1, int selectedImage = -1,
 289                             wxTreeItemData *data = NULL);
 290
 291         // insert a new item in as the last child of the parent
 292     virtual wxTreeItemId AppendItem(const wxTreeItemId& parent,
 293                             const wxString& text,
 294                             int image = -1, int selectedImage = -1,
 295                             wxTreeItemData *data = NULL);
 296
 297         // delete this item and associated data if any
 298     void Delete(const wxTreeItemId& item);
 299         // delete all children (but don't delete the item itself)
 300         // NB: this won't send wxEVT_COMMAND_TREE_ITEM_DELETED events
 301     void DeleteChildren(const wxTreeItemId& item);
 302         // delete all items from the tree
 303         // NB: this won't send wxEVT_COMMAND_TREE_ITEM_DELETED events
 304     void DeleteAllItems();
 305
 306         // expand this item
 307     void Expand(const wxTreeItemId& item);
 308         // collapse the item without removing its children
 309     void Collapse(const wxTreeItemId& item);
 310         // collapse the item and remove all children
 311     void CollapseAndReset(const wxTreeItemId& item);
 312         // toggles the current state
 313     void Toggle(const wxTreeItemId& item);
 314
 315         // remove the selection from currently selected item (if any)
 316     void Unselect();
 317         // unselect all items (only makes sense for multiple selection control)
 318     void UnselectAll();
 319         // select this item
 320     void SelectItem(const wxTreeItemId& item, bool select = true);
 321         // unselect this item
 322     void UnselectItem(const wxTreeItemId& item);
 323         // toggle item selection
 324     void ToggleItemSelection(const wxTreeItemId& item);
 325
 326         // make sure this item is visible (expanding the parent item and/or
 327         // scrolling to this item if necessary)
 328     void EnsureVisible(const wxTreeItemId& item);
 329         // scroll to this item (but don't expand its parent)
 330     void ScrollTo(const wxTreeItemId& item);
 331
 332         // start editing the item label: this (temporarily) replaces the item
 333         // with a one line edit control. The item will be selected if it hadn't
 334         // been before. textCtrlClass parameter allows you to create an edit
 335         // control of arbitrary user-defined class deriving from wxTextCtrl.
 336     wxTextCtrl* EditLabel(const wxTreeItemId& item,
 337                           wxClassInfo* textCtrlClass = CLASSINFO(wxTextCtrl));
 338         // returns the same pointer as StartEdit() if the item is being edited,
 339         // NULL otherwise (it's assumed that no more than one item may be
 340         // edited simultaneously)
 341     wxTextCtrl* GetEditControl() const;
 342         // end editing and accept or discard the changes to item label
 343     void EndEditLabel(const wxTreeItemId& WXUNUSED(item),
 344                       bool discardChanges = false)
 345     {
 346         DoEndEditLabel(discardChanges);
 347     }
 348
 349     // sorting
 350         // this function is called to compare 2 items and should return -1, 0
 351         // or +1 if the first item is less than, equal to or greater than the
 352         // second one. The base class version performs alphabetic comparaison
 353         // of item labels (GetText)
 354     virtual int OnCompareItems(const wxTreeItemId& item1,
 355                                const wxTreeItemId& item2);
 356         // sort the children of this item using OnCompareItems
 357         //
 358         // NB: this function is not reentrant and not MT-safe (FIXME)!
 359     void SortChildren(const wxTreeItemId& item);
 360
 361     // helpers
 362     // -------
 363
 364         // determine to which item (if any) belongs the given point (the
 365         // coordinates specified are relative to the client area of tree ctrl)
 366         // and fill the flags parameter with a bitmask of wxTREE_HITTEST_xxx
 367         // constants.
 368         //
 369         // The first function is more portable (because easier to implement
 370         // on other platforms), but the second one returns some extra info.
 371     wxTreeItemId HitTest(const wxPoint& point)
 372         { int dummy; return HitTest(point, dummy); }
 373     wxTreeItemId HitTest(const wxPoint& point, int& flags);
 374
 375         // get the bounding rectangle of the item (or of its label only)
 376     bool GetBoundingRect(const wxTreeItemId& item,
 377                          wxRect& rect,
 378                          bool textOnly = false) const;
 379
 380     // deprecated
 381     // ----------
 382
 383 #if WXWIN_COMPATIBILITY_2_4
 384     // these methods are deprecated and will be removed in future versions of
 385     // wxWidgets, they're here for compatibility only, don't use them in new
 386     // code (the comments indicate why these methods are now useless and how to
 387     // replace them)
 388
 389         // use Expand, Collapse, CollapseAndReset or Toggle
 390     wxDEPRECATED( void ExpandItem(const wxTreeItemId& item, int action) );
 391
 392         // use AddRoot, PrependItem or AppendItem
 393     wxDEPRECATED( wxTreeItemId InsertItem(const wxTreeItemId& parent,
 394                             const wxString& text,
 395                             int image = -1, int selImage = -1,
 396                             long insertAfter = wxTREE_INSERT_LAST) );
 397
 398         // use Set/GetImageList and Set/GetStateImageList
 399     wxImageList *GetImageList(int) const { return GetImageList(); }
 400     void SetImageList(wxImageList *imageList, int) { SetImageList(imageList); }
 401
 402     // use Set/GetItemImage directly
 403     int GetItemSelectedImage(const wxTreeItemId& item) const
 404         { return GetItemImage(item, wxTreeItemIcon_Selected); }
 405     void SetItemSelectedImage(const wxTreeItemId& item, int image)
 406         { SetItemImage(item, image, wxTreeItemIcon_Selected); }
 407
 408     // use the versions taking wxTreeItemIdValue cookies
 409     wxDEPRECATED( wxTreeItemId GetFirstChild(const wxTreeItemId& item,
 410                                              long& cookie) const );
 411     wxDEPRECATED( wxTreeItemId GetNextChild(const wxTreeItemId& item,
 412                                             long& cookie) const );
 413 #endif // WXWIN_COMPATIBILITY_2_4
 414
 415
 416     // implementation
 417     // --------------
 418
 419     virtual bool ShouldInheritColours() const { return false; }
 420
 421     virtual wxVisualAttributes GetDefaultAttributes() const
 422     {
 423         return GetClassDefaultAttributes(GetWindowVariant());
 424     }
 425
 426     static wxVisualAttributes
 427     GetClassDefaultAttributes(wxWindowVariant variant = wxWINDOW_VARIANT_NORMAL);
 428
 429
 430     virtual WXLRESULT MSWWindowProc(WXUINT nMsg, WXWPARAM wParam, WXLPARAM lParam);
 431     virtual bool MSWCommand(WXUINT param, WXWORD id);
 432     virtual bool MSWOnNotify(int idCtrl, WXLPARAM lParam, WXLPARAM *result);
 433
 434     // override some base class virtuals
 435     virtual bool SetBackgroundColour(const wxColour &colour);
 436     virtual bool SetForegroundColour(const wxColour &colour);
 437
 438     // get/set the check state for the item (only for wxTR_MULTIPLE)
 439     bool IsItemChecked(const wxTreeItemId& item) const;
 440     void SetItemCheck(const wxTreeItemId& item, bool check = true);
 441
 442     // set/get the item state.image (state == -1 means cycle to the next one)
 443     void SetState(const wxTreeItemId& node, int state);
 444     int GetState(const wxTreeItemId& node);
 445
 446 protected:
 447     // SetImageList helper
 448     void SetAnyImageList(wxImageList *imageList, int which);
 449
 450     // refresh a single item
 451     void RefreshItem(const wxTreeItemId& item);
 452
 453     // end edit label
 454     void DoEndEditLabel(bool discardChanges = false);
 455
 456
 457     // data used only while editing the item label:
 458     wxTextCtrl  *m_textCtrl;        // text control in which it is edited
 459     wxTreeItemId m_idEdited;        // the item being edited
 460
 461     wxImageList *m_imageListNormal, // images for tree elements
 462                 *m_imageListState;  // special images for app defined states
 463     bool         m_ownsImageListNormal,
 464                  m_ownsImageListState;
 465
 466 private:
 467     // the common part of all ctors
 468     void Init();
 469
 470     // helper functions
 471     inline bool DoGetItem(wxTreeViewItem *tvItem) const;
 472     inline void DoSetItem(wxTreeViewItem *tvItem);
 473
 474     inline void DoExpand(const wxTreeItemId& item, int flag);
 475
 476     wxTreeItemId DoInsertItem(const wxTreeItemId& parent,
 477                               wxTreeItemId hInsertAfter,
 478                               const wxString& text,
 479                               int image, int selectedImage,
 480                               wxTreeItemData *data);
 481
 482     int DoGetItemImageFromData(const wxTreeItemId& item,
 483                                wxTreeItemIcon which) const;
 484     void DoSetItemImageFromData(const wxTreeItemId& item,
 485                                 int image,
 486                                 wxTreeItemIcon which) const;
 487     void DoSetItemImages(const wxTreeItemId& item, int image, int imageSel);
 488
 489     void DeleteTextCtrl();
 490
 491     // support for additional item images which we implement using
 492     // wxTreeItemIndirectData technique - see the comments in msw/treectrl.cpp
 493     void SetIndirectItemData(const wxTreeItemId& item,
 494                              class wxTreeItemIndirectData *data);
 495     bool HasIndirectData(const wxTreeItemId& item) const;
 496     bool IsDataIndirect(wxTreeItemData *data) const
 497         { return data && data->GetId().m_pItem == 0; }
 498
 499     // the hash storing the items attributes (indexed by item ids)
 500     wxMapTreeAttr m_attrs;
 501
 502     // true if the hash above is not empty
 503     bool m_hasAnyAttr;
 504
 505     // used for dragging
 506     wxDragImage *m_dragImage;
 507
 508     // Virtual root item, if wxTR_HIDE_ROOT is set.
 509     void* m_pVirtualRoot;
 510
 511     // the starting item for selection with Shift
 512     wxTreeItemId m_htSelStart;
 513
 514     friend class wxTreeItemIndirectData;
 515     friend class wxTreeSortHelper;
 516
 517     DECLARE_DYNAMIC_CLASS(wxTreeCtrl)
 518     DECLARE_NO_COPY_CLASS(wxTreeCtrl)
 519 };
 520
 521 #endif // wxUSE_TREECTRL
 522
 523 #endif
 524     // _WX_TREECTRL_H_