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