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