include/wx/treectrl.h

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        wx/treectrl.h
   3 // Purpose:     wxTreeCtrl base header
   4 // Author:      Karsten Ballueder
   5 // Modified by:
   6 // Created:
   7 // Copyright:   (c) Karsten Ballueder
   8 // RCS-ID:      $Id$
   9 // Licence:     wxWindows licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 #ifndef _WX_TREECTRL_H_BASE_
  13 #define _WX_TREECTRL_H_BASE_
  14
  15 // ----------------------------------------------------------------------------
  16 // headers
  17 // ----------------------------------------------------------------------------
  18
  19 #include "wx/defs.h"
  20
  21 #if wxUSE_TREECTRL
  22
  23 #include "wx/control.h"
  24 #include "wx/treebase.h"
  25 #include "wx/textctrl.h" // wxTextCtrl::ms_classinfo used through wxCLASSINFO macro
  26
  27 class WXDLLIMPEXP_FWD_CORE wxImageList;
  28
  29 // ----------------------------------------------------------------------------
  30 // wxTreeCtrlBase
  31 // ----------------------------------------------------------------------------
  32
  33 class WXDLLIMPEXP_CORE wxTreeCtrlBase : public wxControl
  34 {
  35 public:
  36     wxTreeCtrlBase();
  37     virtual ~wxTreeCtrlBase();
  38
  39     // accessors
  40     // ---------
  41
  42         // get the total number of items in the control
  43     virtual unsigned int GetCount() const = 0;
  44
  45         // indent is the number of pixels the children are indented relative to
  46         // the parents position. SetIndent() also redraws the control
  47         // immediately.
  48     virtual unsigned int GetIndent() const = 0;
  49     virtual void SetIndent(unsigned int indent) = 0;
  50
  51         // spacing is the number of pixels between the start and the Text
  52         // (has no effect under wxMSW)
  53     unsigned int GetSpacing() const { return m_spacing; }
  54     void SetSpacing(unsigned int spacing) { m_spacing = spacing; }
  55
  56         // image list: these functions allow to associate an image list with
  57         // the control and retrieve it. Note that the control does _not_ delete
  58         // the associated image list when it's deleted in order to allow image
  59         // lists to be shared between different controls.
  60         //
  61         // The normal image list is for the icons which correspond to the
  62         // normal tree item state (whether it is selected or not).
  63         // Additionally, the application might choose to show a state icon
  64         // which corresponds to an app-defined item state (for example,
  65         // checked/unchecked) which are taken from the state image list.
  66     wxImageList *GetImageList() const { return m_imageListNormal; }
  67     wxImageList *GetStateImageList() const { return m_imageListState; }
  68
  69     virtual void SetImageList(wxImageList *imageList) = 0;
  70     virtual void SetStateImageList(wxImageList *imageList) = 0;
  71     void AssignImageList(wxImageList *imageList)
  72     {
  73         SetImageList(imageList);
  74         m_ownsImageListNormal = true;
  75     }
  76     void AssignStateImageList(wxImageList *imageList)
  77     {
  78         SetStateImageList(imageList);
  79         m_ownsImageListState = true;
  80     }
  81
  82
  83     // Functions to work with tree ctrl items. Unfortunately, they can _not_ be
  84     // member functions of wxTreeItem because they must know the tree the item
  85     // belongs to for Windows implementation and storing the pointer to
  86     // wxTreeCtrl in each wxTreeItem is just too much waste.
  87
  88     // accessors
  89     // ---------
  90
  91         // retrieve items label
  92     virtual wxString GetItemText(const wxTreeItemId& item) const = 0;
  93         // get one of the images associated with the item (normal by default)
  94     virtual int GetItemImage(const wxTreeItemId& item,
  95                      wxTreeItemIcon which = wxTreeItemIcon_Normal) const = 0;
  96         // get the data associated with the item
  97     virtual wxTreeItemData *GetItemData(const wxTreeItemId& item) const = 0;
  98
  99         // get the item's text colour
 100     virtual wxColour GetItemTextColour(const wxTreeItemId& item) const = 0;
 101
 102         // get the item's background colour
 103     virtual wxColour GetItemBackgroundColour(const wxTreeItemId& item) const = 0;
 104
 105         // get the item's font
 106     virtual wxFont GetItemFont(const wxTreeItemId& item) const = 0;
 107
 108         // get the items state
 109     int GetItemState(const wxTreeItemId& item) const
 110     {
 111         return DoGetItemState(item);
 112     }
 113
 114     // modifiers
 115     // ---------
 116
 117         // set items label
 118     virtual void SetItemText(const wxTreeItemId& item, const wxString& text) = 0;
 119         // set one of the images associated with the item (normal by default)
 120     virtual void SetItemImage(const wxTreeItemId& item,
 121                               int image,
 122                               wxTreeItemIcon which = wxTreeItemIcon_Normal) = 0;
 123         // associate some data with the item
 124     virtual void SetItemData(const wxTreeItemId& item, wxTreeItemData *data) = 0;
 125
 126         // force appearance of [+] button near the item. This is useful to
 127         // allow the user to expand the items which don't have any children now
 128         // - but instead add them only when needed, thus minimizing memory
 129         // usage and loading time.
 130     virtual void SetItemHasChildren(const wxTreeItemId& item,
 131                                     bool has = true) = 0;
 132
 133         // the item will be shown in bold
 134     virtual void SetItemBold(const wxTreeItemId& item, bool bold = true) = 0;
 135
 136         // the item will be shown with a drop highlight
 137     virtual void SetItemDropHighlight(const wxTreeItemId& item,
 138                                       bool highlight = true) = 0;
 139
 140         // set the items text colour
 141     virtual void SetItemTextColour(const wxTreeItemId& item,
 142                                    const wxColour& col) = 0;
 143
 144         // set the items background colour
 145     virtual void SetItemBackgroundColour(const wxTreeItemId& item,
 146                                          const wxColour& col) = 0;
 147
 148         // set the items font (should be of the same height for all items)
 149     virtual void SetItemFont(const wxTreeItemId& item,
 150                              const wxFont& font) = 0;
 151
 152         // set the items state (special state values: wxTREE_ITEMSTATE_NONE/NEXT/PREV)
 153     void SetItemState(const wxTreeItemId& item, int state);
 154
 155     // item status inquiries
 156     // ---------------------
 157
 158         // is the item visible (it might be outside the view or not expanded)?
 159     virtual bool IsVisible(const wxTreeItemId& item) const = 0;
 160         // does the item has any children?
 161     virtual bool ItemHasChildren(const wxTreeItemId& item) const = 0;
 162         // same as above
 163     bool HasChildren(const wxTreeItemId& item) const
 164       { return ItemHasChildren(item); }
 165         // is the item expanded (only makes sense if HasChildren())?
 166     virtual bool IsExpanded(const wxTreeItemId& item) const = 0;
 167         // is this item currently selected (the same as has focus)?
 168     virtual bool IsSelected(const wxTreeItemId& item) const = 0;
 169         // is item text in bold font?
 170     virtual bool IsBold(const wxTreeItemId& item) const = 0;
 171         // is the control empty?
 172     bool IsEmpty() const;
 173
 174
 175     // number of children
 176     // ------------------
 177
 178         // if 'recursively' is false, only immediate children count, otherwise
 179         // the returned number is the number of all items in this branch
 180     virtual size_t GetChildrenCount(const wxTreeItemId& item,
 181                                     bool recursively = true) const = 0;
 182
 183     // navigation
 184     // ----------
 185
 186     // wxTreeItemId.IsOk() will return false if there is no such item
 187
 188         // get the root tree item
 189     virtual wxTreeItemId GetRootItem() const = 0;
 190
 191         // get the item currently selected (may return NULL if no selection)
 192     virtual wxTreeItemId GetSelection() const = 0;
 193
 194         // get the items currently selected, return the number of such item
 195         //
 196         // NB: this operation is expensive and can take a long time for a
 197         //     control with a lot of items (~ O(number of items)).
 198     virtual size_t GetSelections(wxArrayTreeItemIds& selections) const = 0;
 199
 200         // get the last item to be clicked when the control has wxTR_MULTIPLE
 201         // equivalent to GetSelection() if not wxTR_MULTIPLE
 202     virtual wxTreeItemId GetFocusedItem() const = 0;
 203
 204
 205         // Clears the currently focused item
 206     virtual void ClearFocusedItem() = 0;
 207         // Sets the currently focused item. Item should be valid
 208     virtual void SetFocusedItem(const wxTreeItemId& item) = 0;
 209
 210
 211         // get the parent of this item (may return NULL if root)
 212     virtual wxTreeItemId GetItemParent(const wxTreeItemId& item) const = 0;
 213
 214         // for this enumeration function you must pass in a "cookie" parameter
 215         // which is opaque for the application but is necessary for the library
 216         // to make these functions reentrant (i.e. allow more than one
 217         // enumeration on one and the same object simultaneously). Of course,
 218         // the "cookie" passed to GetFirstChild() and GetNextChild() should be
 219         // the same!
 220
 221         // get the first child of this item
 222     virtual wxTreeItemId GetFirstChild(const wxTreeItemId& item,
 223                                        wxTreeItemIdValue& cookie) const = 0;
 224         // get the next child
 225     virtual wxTreeItemId GetNextChild(const wxTreeItemId& item,
 226                                       wxTreeItemIdValue& cookie) const = 0;
 227         // get the last child of this item - this method doesn't use cookies
 228     virtual wxTreeItemId GetLastChild(const wxTreeItemId& item) const = 0;
 229
 230         // get the next sibling of this item
 231     virtual wxTreeItemId GetNextSibling(const wxTreeItemId& item) const = 0;
 232         // get the previous sibling
 233     virtual wxTreeItemId GetPrevSibling(const wxTreeItemId& item) const = 0;
 234
 235         // get first visible item
 236     virtual wxTreeItemId GetFirstVisibleItem() const = 0;
 237         // get the next visible item: item must be visible itself!
 238         // see IsVisible() and wxTreeCtrl::GetFirstVisibleItem()
 239     virtual wxTreeItemId GetNextVisible(const wxTreeItemId& item) const = 0;
 240         // get the previous visible item: item must be visible itself!
 241     virtual wxTreeItemId GetPrevVisible(const wxTreeItemId& item) const = 0;
 242
 243     // operations
 244     // ----------
 245
 246         // add the root node to the tree
 247     virtual wxTreeItemId AddRoot(const wxString& text,
 248                                  int image = -1, int selImage = -1,
 249                                  wxTreeItemData *data = NULL) = 0;
 250
 251         // insert a new item in as the first child of the parent
 252     wxTreeItemId PrependItem(const wxTreeItemId& parent,
 253                              const wxString& text,
 254                              int image = -1, int selImage = -1,
 255                              wxTreeItemData *data = NULL)
 256     {
 257         return DoInsertItem(parent, 0u, text, image, selImage, data);
 258     }
 259
 260         // insert a new item after a given one
 261     wxTreeItemId InsertItem(const wxTreeItemId& parent,
 262                             const wxTreeItemId& idPrevious,
 263                             const wxString& text,
 264                             int image = -1, int selImage = -1,
 265                             wxTreeItemData *data = NULL)
 266     {
 267         return DoInsertAfter(parent, idPrevious, text, image, selImage, data);
 268     }
 269
 270         // insert a new item before the one with the given index
 271     wxTreeItemId InsertItem(const wxTreeItemId& parent,
 272                             size_t pos,
 273                             const wxString& text,
 274                             int image = -1, int selImage = -1,
 275                             wxTreeItemData *data = NULL)
 276     {
 277         return DoInsertItem(parent, pos, text, image, selImage, data);
 278     }
 279
 280         // insert a new item in as the last child of the parent
 281     wxTreeItemId AppendItem(const wxTreeItemId& parent,
 282                             const wxString& text,
 283                             int image = -1, int selImage = -1,
 284                             wxTreeItemData *data = NULL)
 285     {
 286         return DoInsertItem(parent, (size_t)-1, text, image, selImage, data);
 287     }
 288
 289         // delete this item and associated data if any
 290     virtual void Delete(const wxTreeItemId& item) = 0;
 291         // delete all children (but don't delete the item itself)
 292         // NB: this won't send wxEVT_COMMAND_TREE_ITEM_DELETED events
 293     virtual void DeleteChildren(const wxTreeItemId& item) = 0;
 294         // delete all items from the tree
 295         // NB: this won't send wxEVT_COMMAND_TREE_ITEM_DELETED events
 296     virtual void DeleteAllItems() = 0;
 297
 298         // expand this item
 299     virtual void Expand(const wxTreeItemId& item) = 0;
 300         // expand the item and all its children recursively
 301     void ExpandAllChildren(const wxTreeItemId& item);
 302         // expand all items
 303     void ExpandAll();
 304         // collapse the item without removing its children
 305     virtual void Collapse(const wxTreeItemId& item) = 0;
 306         // collapse the item and all its children
 307     void CollapseAllChildren(const wxTreeItemId& item);
 308         // collapse all items
 309     void CollapseAll();
 310         // collapse the item and remove all children
 311     virtual void CollapseAndReset(const wxTreeItemId& item) = 0;
 312         // toggles the current state
 313     virtual void Toggle(const wxTreeItemId& item) = 0;
 314
 315         // remove the selection from currently selected item (if any)
 316     virtual void Unselect() = 0;
 317         // unselect all items (only makes sense for multiple selection control)
 318     virtual void UnselectAll() = 0;
 319         // select this item
 320     virtual void SelectItem(const wxTreeItemId& item, bool select = true) = 0;
 321         // selects all (direct) children for given parent (only for
 322         // multiselection controls)
 323     virtual void SelectChildren(const wxTreeItemId& parent) = 0;
 324         // unselect this item
 325     void UnselectItem(const wxTreeItemId& item) { SelectItem(item, false); }
 326         // toggle item selection
 327     void ToggleItemSelection(const wxTreeItemId& item)
 328     {
 329         SelectItem(item, !IsSelected(item));
 330     }
 331
 332         // make sure this item is visible (expanding the parent item and/or
 333         // scrolling to this item if necessary)
 334     virtual void EnsureVisible(const wxTreeItemId& item) = 0;
 335         // scroll to this item (but don't expand its parent)
 336     virtual void ScrollTo(const wxTreeItemId& item) = 0;
 337
 338         // start editing the item label: this (temporarily) replaces the item
 339         // with a one line edit control. The item will be selected if it hadn't
 340         // been before. textCtrlClass parameter allows you to create an edit
 341         // control of arbitrary user-defined class deriving from wxTextCtrl.
 342     virtual wxTextCtrl *EditLabel(const wxTreeItemId& item,
 343                       wxClassInfo* textCtrlClass = wxCLASSINFO(wxTextCtrl)) = 0;
 344         // returns the same pointer as StartEdit() if the item is being edited,
 345         // NULL otherwise (it's assumed that no more than one item may be
 346         // edited simultaneously)
 347     virtual wxTextCtrl *GetEditControl() const = 0;
 348         // end editing and accept or discard the changes to item label
 349     virtual void EndEditLabel(const wxTreeItemId& item,
 350                               bool discardChanges = false) = 0;
 351
 352     // sorting
 353     // -------
 354
 355         // this function is called to compare 2 items and should return -1, 0
 356         // or +1 if the first item is less than, equal to or greater than the
 357         // second one. The base class version performs alphabetic comparaison
 358         // of item labels (GetText)
 359     virtual int OnCompareItems(const wxTreeItemId& item1,
 360                                const wxTreeItemId& item2)
 361     {
 362         return wxStrcmp(GetItemText(item1), GetItemText(item2));
 363     }
 364
 365         // sort the children of this item using OnCompareItems
 366         //
 367         // NB: this function is not reentrant and not MT-safe (FIXME)!
 368     virtual void SortChildren(const wxTreeItemId& item) = 0;
 369
 370     // items geometry
 371     // --------------
 372
 373         // determine to which item (if any) belongs the given point (the
 374         // coordinates specified are relative to the client area of tree ctrl)
 375         // and, in the second variant, fill the flags parameter with a bitmask
 376         // of wxTREE_HITTEST_xxx constants.
 377     wxTreeItemId HitTest(const wxPoint& point) const
 378         { int dummy; return DoTreeHitTest(point, dummy); }
 379     wxTreeItemId HitTest(const wxPoint& point, int& flags) const
 380         { return DoTreeHitTest(point, flags); }
 381
 382         // get the bounding rectangle of the item (or of its label only)
 383     virtual bool GetBoundingRect(const wxTreeItemId& item,
 384                                  wxRect& rect,
 385                                  bool textOnly = false) const = 0;
 386
 387
 388     // implementation
 389     // --------------
 390
 391     virtual bool ShouldInheritColours() const { return false; }
 392
 393     // hint whether to calculate best size quickly or accurately
 394     void SetQuickBestSize(bool q) { m_quickBestSize = q; }
 395     bool GetQuickBestSize() const { return m_quickBestSize; }
 396
 397 protected:
 398     virtual wxSize DoGetBestSize() const;
 399
 400     // common part of Get/SetItemState()
 401     virtual int DoGetItemState(const wxTreeItemId& item) const = 0;
 402     virtual void DoSetItemState(const wxTreeItemId& item, int state) = 0;
 403
 404     // common part of Append/Prepend/InsertItem()
 405     //
 406     // pos is the position at which to insert the item or (size_t)-1 to append
 407     // it to the end
 408     virtual wxTreeItemId DoInsertItem(const wxTreeItemId& parent,
 409                                       size_t pos,
 410                                       const wxString& text,
 411                                       int image, int selImage,
 412                                       wxTreeItemData *data) = 0;
 413
 414     // and this function implements overloaded InsertItem() taking wxTreeItemId
 415     // (it can't be called InsertItem() as we'd have virtual function hiding
 416     // problem in derived classes then)
 417     virtual wxTreeItemId DoInsertAfter(const wxTreeItemId& parent,
 418                                        const wxTreeItemId& idPrevious,
 419                                        const wxString& text,
 420                                        int image = -1, int selImage = -1,
 421                                        wxTreeItemData *data = NULL) = 0;
 422
 423     // real HitTest() implementation: again, can't be called just HitTest()
 424     // because it's overloaded and so the non-virtual overload would be hidden
 425     // (and can't be called DoHitTest() because this is already in wxWindow)
 426     virtual wxTreeItemId DoTreeHitTest(const wxPoint& point,
 427                                         int& flags) const = 0;
 428
 429
 430     wxImageList *m_imageListNormal, // images for tree elements
 431                 *m_imageListState;  // special images for app defined states
 432     bool         m_ownsImageListNormal,
 433                  m_ownsImageListState;
 434
 435     // spacing between left border and the text
 436     unsigned int m_spacing;
 437
 438     // whether full or quick calculation is done in DoGetBestSize
 439     bool        m_quickBestSize;
 440
 441
 442 private:
 443     // Intercept Escape and Return keys to ensure that our in-place edit
 444     // control always gets them before they're used for dialog navigation or
 445     // anything else.
 446     void OnCharHook(wxKeyEvent& event);
 447
 448
 449     wxDECLARE_NO_COPY_CLASS(wxTreeCtrlBase);
 450 };
 451
 452 // ----------------------------------------------------------------------------
 453 // include the platform-dependent wxTreeCtrl class
 454 // ----------------------------------------------------------------------------
 455
 456 #if defined(__WXUNIVERSAL__)
 457     #include "wx/generic/treectlg.h"
 458 #elif defined(__WXMSW__)
 459     #include "wx/msw/treectrl.h"
 460 #elif defined(__WXMOTIF__)
 461     #include "wx/generic/treectlg.h"
 462 #elif defined(__WXGTK__)
 463     #include "wx/generic/treectlg.h"
 464 #elif defined(__WXMAC__)
 465     #include "wx/generic/treectlg.h"
 466 #elif defined(__WXCOCOA__)
 467     #include "wx/generic/treectlg.h"
 468 #elif defined(__WXPM__)
 469     #include "wx/generic/treectlg.h"
 470 #endif
 471
 472 #endif // wxUSE_TREECTRL
 473
 474 #endif // _WX_TREECTRL_H_BASE_