include/wx/treebase.h

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        wx/treebase.h
   3 // Purpose:     wxTreeCtrl base classes and types
   4 // Author:      Julian Smart et al
   5 // Modified by:
   6 // Created:     01/02/97
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) 1997,1998 Robert Roebling
   9 // Licence:     wxWindows licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 #ifndef _WX_TREEBASE_H_
  13 #define _WX_TREEBASE_H_
  14
  15 // ----------------------------------------------------------------------------
  16 // headers
  17 // ----------------------------------------------------------------------------
  18
  19 #include "wx/defs.h"
  20
  21 #if wxUSE_TREECTRL
  22
  23 #include "wx/window.h"  // for wxClientData
  24 #include "wx/event.h"
  25 #include "wx/dynarray.h"
  26
  27 #if WXWIN_COMPATIBILITY_2_6
  28
  29 // flags for deprecated `Expand(int action)', will be removed in next versions
  30 enum
  31 {
  32     wxTREE_EXPAND_EXPAND,
  33     wxTREE_EXPAND_COLLAPSE,
  34     wxTREE_EXPAND_COLLAPSE_RESET,
  35     wxTREE_EXPAND_TOGGLE
  36 };
  37
  38 #endif // WXWIN_COMPATIBILITY_2_6
  39
  40 // ----------------------------------------------------------------------------
  41 // wxTreeItemId identifies an element of the tree. In this implementation, it's
  42 // just a trivial wrapper around Win32 HTREEITEM or a pointer to some private
  43 // data structure in the generic version. It's opaque for the application and
  44 // the only method which can be used by user code is IsOk().
  45 // ----------------------------------------------------------------------------
  46
  47 // Using this typedef removes an ambiguity when calling Remove()
  48 typedef void *wxTreeItemIdValue;
  49
  50 class WXDLLEXPORT wxTreeItemId
  51 {
  52     friend bool operator==(const wxTreeItemId&, const wxTreeItemId&);
  53 public:
  54     // ctors
  55         // 0 is invalid value for HTREEITEM
  56     wxTreeItemId() { m_pItem = 0; }
  57
  58         // construct wxTreeItemId from the native item id
  59     wxTreeItemId(void *pItem) { m_pItem = pItem; }
  60
  61         // default copy ctor/assignment operator are ok for us
  62
  63     // accessors
  64         // is this a valid tree item?
  65     bool IsOk() const { return m_pItem != 0; }
  66         // return true if this item is not valid
  67     bool operator!() const { return !IsOk(); }
  68
  69     // operations
  70         // invalidate the item
  71     void Unset() { m_pItem = 0; }
  72
  73     operator bool() const { return IsOk(); }
  74
  75     wxTreeItemIdValue m_pItem;
  76 };
  77
  78 inline bool operator==(const wxTreeItemId& i1, const wxTreeItemId& i2)
  79 {
  80     return i1.m_pItem == i2.m_pItem;
  81 }
  82
  83 inline bool operator!=(const wxTreeItemId& i1, const wxTreeItemId& i2)
  84 {
  85     return i1.m_pItem != i2.m_pItem;
  86 }
  87
  88 // ----------------------------------------------------------------------------
  89 // wxTreeItemData is some (arbitrary) user class associated with some item. The
  90 // main advantage of having this class (compared to old untyped interface) is
  91 // that wxTreeItemData's are destroyed automatically by the tree and, as this
  92 // class has virtual dtor, it means that the memory will be automatically
  93 // freed. OTOH, we don't just use wxObject instead of wxTreeItemData because
  94 // the size of this class is critical: in any real application, each tree leaf
  95 // will have wxTreeItemData associated with it and number of leaves may be
  96 // quite big.
  97 //
  98 // Because the objects of this class are deleted by the tree, they should
  99 // always be allocated on the heap!
 100 // ----------------------------------------------------------------------------
 101
 102 class WXDLLEXPORT wxTreeItemData: public wxClientData
 103 {
 104 friend class WXDLLEXPORT wxTreeCtrl;
 105 friend class WXDLLEXPORT wxGenericTreeCtrl;
 106 public:
 107     // creation/destruction
 108     // --------------------
 109         // default ctor
 110     wxTreeItemData() { }
 111
 112         // default copy ctor/assignment operator are ok
 113
 114     // accessor: get the item associated with us
 115     const wxTreeItemId& GetId() const { return m_pItem; }
 116     void SetId(const wxTreeItemId& id) { m_pItem = id; }
 117
 118 protected:
 119     wxTreeItemId m_pItem;
 120 };
 121
 122 WX_DEFINE_EXPORTED_ARRAY_PTR(wxTreeItemIdValue, wxArrayTreeItemIdsBase);
 123
 124 // this is a wrapper around the array class defined above which allow to wok
 125 // with vaue of natural wxTreeItemId type instead of using wxTreeItemIdValue
 126 // and does it without any loss of efficiency
 127 class WXDLLEXPORT wxArrayTreeItemIds : public wxArrayTreeItemIdsBase
 128 {
 129 public:
 130     void Add(const wxTreeItemId& id)
 131         { wxArrayTreeItemIdsBase::Add(id.m_pItem); }
 132     void Insert(const wxTreeItemId& id, size_t pos)
 133         { wxArrayTreeItemIdsBase::Insert(id.m_pItem, pos); }
 134     wxTreeItemId Item(size_t i) const
 135         { return wxTreeItemId(wxArrayTreeItemIdsBase::Item(i)); }
 136     wxTreeItemId operator[](size_t i) const { return Item(i); }
 137 };
 138
 139 // ----------------------------------------------------------------------------
 140 // constants
 141 // ----------------------------------------------------------------------------
 142
 143 // enum for different images associated with a treectrl item
 144 enum wxTreeItemIcon
 145 {
 146     wxTreeItemIcon_Normal,              // not selected, not expanded
 147     wxTreeItemIcon_Selected,            //     selected, not expanded
 148     wxTreeItemIcon_Expanded,            // not selected,     expanded
 149     wxTreeItemIcon_SelectedExpanded,    //     selected,     expanded
 150     wxTreeItemIcon_Max
 151 };
 152
 153 // ----------------------------------------------------------------------------
 154 // wxTreeCtrl flags
 155 // ----------------------------------------------------------------------------
 156
 157 #define wxTR_NO_BUTTONS              0x0000     // for convenience
 158 #define wxTR_HAS_BUTTONS             0x0001     // draw collapsed/expanded btns
 159 #define wxTR_NO_LINES                0x0004     // don't draw lines at all
 160 #define wxTR_LINES_AT_ROOT           0x0008     // connect top-level nodes
 161 #define wxTR_TWIST_BUTTONS           0x0010     // still used by wxTreeListCtrl
 162
 163 #define wxTR_SINGLE                  0x0000     // for convenience
 164 #define wxTR_MULTIPLE                0x0020     // can select multiple items
 165 #define wxTR_EXTENDED                0x0040     // TODO: allow extended selection
 166 #define wxTR_HAS_VARIABLE_ROW_HEIGHT 0x0080     // what it says
 167
 168 #define wxTR_EDIT_LABELS             0x0200     // can edit item labels
 169 #define wxTR_ROW_LINES               0x0400     // put border around items
 170 #define wxTR_HIDE_ROOT               0x0800     // don't display root node
 171
 172 #define wxTR_FULL_ROW_HIGHLIGHT      0x2000     // highlight full horz space
 173
 174 #ifdef __WXGTK20__
 175 #define wxTR_DEFAULT_STYLE           (wxTR_HAS_BUTTONS | wxTR_NO_LINES)
 176 #else
 177 #define wxTR_DEFAULT_STYLE           (wxTR_HAS_BUTTONS | wxTR_LINES_AT_ROOT)
 178 #endif
 179
 180 #if WXWIN_COMPATIBILITY_2_6
 181 // deprecated, don't use
 182 #define wxTR_MAC_BUTTONS             0
 183 #define wxTR_AQUA_BUTTONS            0
 184 #endif // WXWIN_COMPATIBILITY_2_6
 185
 186
 187 // values for the `flags' parameter of wxTreeCtrl::HitTest() which determine
 188 // where exactly the specified point is situated:
 189
 190 static const int wxTREE_HITTEST_ABOVE            = 0x0001;
 191 static const int wxTREE_HITTEST_BELOW            = 0x0002;
 192 static const int wxTREE_HITTEST_NOWHERE          = 0x0004;
 193     // on the button associated with an item.
 194 static const int wxTREE_HITTEST_ONITEMBUTTON     = 0x0008;
 195     // on the bitmap associated with an item.
 196 static const int wxTREE_HITTEST_ONITEMICON       = 0x0010;
 197     // on the indent associated with an item.
 198 static const int wxTREE_HITTEST_ONITEMINDENT     = 0x0020;
 199     // on the label (string) associated with an item.
 200 static const int wxTREE_HITTEST_ONITEMLABEL      = 0x0040;
 201     // on the right of the label associated with an item.
 202 static const int wxTREE_HITTEST_ONITEMRIGHT      = 0x0080;
 203     // on the label (string) associated with an item.
 204 static const int wxTREE_HITTEST_ONITEMSTATEICON  = 0x0100;
 205     // on the left of the wxTreeCtrl.
 206 static const int wxTREE_HITTEST_TOLEFT           = 0x0200;
 207     // on the right of the wxTreeCtrl.
 208 static const int wxTREE_HITTEST_TORIGHT          = 0x0400;
 209     // on the upper part (first half) of the item.
 210 static const int wxTREE_HITTEST_ONITEMUPPERPART  = 0x0800;
 211     // on the lower part (second half) of the item.
 212 static const int wxTREE_HITTEST_ONITEMLOWERPART  = 0x1000;
 213
 214     // anywhere on the item
 215 static const int wxTREE_HITTEST_ONITEM  = wxTREE_HITTEST_ONITEMICON |
 216                                           wxTREE_HITTEST_ONITEMLABEL;
 217
 218 // tree ctrl default name
 219 extern WXDLLEXPORT_DATA(const wxChar) wxTreeCtrlNameStr[];
 220
 221 // ----------------------------------------------------------------------------
 222 // wxTreeItemAttr: a structure containing the visual attributes of an item
 223 // ----------------------------------------------------------------------------
 224
 225 class WXDLLEXPORT wxTreeItemAttr
 226 {
 227 public:
 228     // ctors
 229     wxTreeItemAttr() { }
 230     wxTreeItemAttr(const wxColour& colText,
 231                    const wxColour& colBack,
 232                    const wxFont& font)
 233         : m_colText(colText), m_colBack(colBack), m_font(font) { }
 234
 235     // setters
 236     void SetTextColour(const wxColour& colText) { m_colText = colText; }
 237     void SetBackgroundColour(const wxColour& colBack) { m_colBack = colBack; }
 238     void SetFont(const wxFont& font) { m_font = font; }
 239
 240     // accessors
 241     bool HasTextColour() const { return m_colText.Ok(); }
 242     bool HasBackgroundColour() const { return m_colBack.Ok(); }
 243     bool HasFont() const { return m_font.Ok(); }
 244
 245     const wxColour& GetTextColour() const { return m_colText; }
 246     const wxColour& GetBackgroundColour() const { return m_colBack; }
 247     const wxFont& GetFont() const { return m_font; }
 248
 249 private:
 250     wxColour m_colText,
 251              m_colBack;
 252     wxFont   m_font;
 253 };
 254
 255 // ----------------------------------------------------------------------------
 256 // wxTreeEvent is a special class for all events associated with tree controls
 257 //
 258 // NB: note that not all accessors make sense for all events, see the event
 259 //     descriptions below
 260 // ----------------------------------------------------------------------------
 261
 262 class WXDLLEXPORT  wxTreeCtrlBase;
 263
 264 class WXDLLEXPORT wxTreeEvent : public wxNotifyEvent
 265 {
 266 public:
 267     wxTreeEvent(wxEventType commandType,
 268                 wxTreeCtrlBase *tree,
 269                 const wxTreeItemId &item = wxTreeItemId());
 270     wxTreeEvent(wxEventType commandType = wxEVT_NULL, int id = 0);
 271     wxTreeEvent(const wxTreeEvent& event);
 272
 273     virtual wxEvent *Clone() const { return new wxTreeEvent(*this); }
 274
 275     // accessors
 276         // get the item on which the operation was performed or the newly
 277         // selected item for wxEVT_COMMAND_TREE_SEL_CHANGED/ING events
 278     wxTreeItemId GetItem() const { return m_item; }
 279     void SetItem(const wxTreeItemId& item) { m_item = item; }
 280
 281         // for wxEVT_COMMAND_TREE_SEL_CHANGED/ING events, get the previously
 282         // selected item
 283     wxTreeItemId GetOldItem() const { return m_itemOld; }
 284     void SetOldItem(const wxTreeItemId& item) { m_itemOld = item; }
 285
 286         // the point where the mouse was when the drag operation started (for
 287         // wxEVT_COMMAND_TREE_BEGIN_(R)DRAG events only) or click position
 288     wxPoint GetPoint() const { return m_pointDrag; }
 289     void SetPoint(const wxPoint& pt) { m_pointDrag = pt; }
 290
 291         // keyboard data (for wxEVT_COMMAND_TREE_KEY_DOWN only)
 292     const wxKeyEvent& GetKeyEvent() const { return m_evtKey; }
 293     int GetKeyCode() const { return m_evtKey.GetKeyCode(); }
 294     void SetKeyEvent(const wxKeyEvent& evt) { m_evtKey = evt; }
 295
 296         // label (for EVT_TREE_{BEGIN|END}_LABEL_EDIT only)
 297     const wxString& GetLabel() const { return m_label; }
 298     void SetLabel(const wxString& label) { m_label = label; }
 299
 300         // edit cancel flag (for EVT_TREE_{BEGIN|END}_LABEL_EDIT only)
 301     bool IsEditCancelled() const { return m_editCancelled; }
 302     void SetEditCanceled(bool editCancelled) { m_editCancelled = editCancelled; }
 303
 304         // Set the tooltip for the item (for EVT\_TREE\_ITEM\_GETTOOLTIP events)
 305     void SetToolTip(const wxString& toolTip) { m_label = toolTip; }
 306     wxString GetToolTip() { return m_label; }
 307
 308 private:
 309     // not all of the members are used (or initialized) for all events
 310     wxKeyEvent    m_evtKey;
 311     wxTreeItemId  m_item,
 312                   m_itemOld;
 313     wxPoint       m_pointDrag;
 314     wxString      m_label;
 315     bool          m_editCancelled;
 316
 317     friend class WXDLLEXPORT wxTreeCtrl;
 318     friend class WXDLLEXPORT wxGenericTreeCtrl;
 319
 320     DECLARE_DYNAMIC_CLASS(wxTreeEvent)
 321 };
 322
 323 typedef void (wxEvtHandler::*wxTreeEventFunction)(wxTreeEvent&);
 324
 325 // ----------------------------------------------------------------------------
 326 // tree control events and macros for handling them
 327 // ----------------------------------------------------------------------------
 328
 329 BEGIN_DECLARE_EVENT_TYPES()
 330     DECLARE_EVENT_TYPE(wxEVT_COMMAND_TREE_BEGIN_DRAG, 600)
 331     DECLARE_EVENT_TYPE(wxEVT_COMMAND_TREE_BEGIN_RDRAG, 601)
 332     DECLARE_EVENT_TYPE(wxEVT_COMMAND_TREE_BEGIN_LABEL_EDIT, 602)
 333     DECLARE_EVENT_TYPE(wxEVT_COMMAND_TREE_END_LABEL_EDIT, 603)
 334     DECLARE_EVENT_TYPE(wxEVT_COMMAND_TREE_DELETE_ITEM, 604)
 335     DECLARE_EVENT_TYPE(wxEVT_COMMAND_TREE_GET_INFO, 605)
 336     DECLARE_EVENT_TYPE(wxEVT_COMMAND_TREE_SET_INFO, 606)
 337     DECLARE_EVENT_TYPE(wxEVT_COMMAND_TREE_ITEM_EXPANDED, 607)
 338     DECLARE_EVENT_TYPE(wxEVT_COMMAND_TREE_ITEM_EXPANDING, 608)
 339     DECLARE_EVENT_TYPE(wxEVT_COMMAND_TREE_ITEM_COLLAPSED, 609)
 340     DECLARE_EVENT_TYPE(wxEVT_COMMAND_TREE_ITEM_COLLAPSING, 610)
 341     DECLARE_EVENT_TYPE(wxEVT_COMMAND_TREE_SEL_CHANGED, 611)
 342     DECLARE_EVENT_TYPE(wxEVT_COMMAND_TREE_SEL_CHANGING, 612)
 343     DECLARE_EVENT_TYPE(wxEVT_COMMAND_TREE_KEY_DOWN, 613)
 344     DECLARE_EVENT_TYPE(wxEVT_COMMAND_TREE_ITEM_ACTIVATED, 614)
 345     DECLARE_EVENT_TYPE(wxEVT_COMMAND_TREE_ITEM_RIGHT_CLICK, 615)
 346     DECLARE_EVENT_TYPE(wxEVT_COMMAND_TREE_ITEM_MIDDLE_CLICK, 616)
 347     DECLARE_EVENT_TYPE(wxEVT_COMMAND_TREE_END_DRAG, 617)
 348     DECLARE_EVENT_TYPE(wxEVT_COMMAND_TREE_STATE_IMAGE_CLICK, 618)
 349     DECLARE_EVENT_TYPE(wxEVT_COMMAND_TREE_ITEM_GETTOOLTIP, 619)
 350     DECLARE_EVENT_TYPE(wxEVT_COMMAND_TREE_ITEM_MENU, 620)
 351 END_DECLARE_EVENT_TYPES()
 352
 353 #define wxTreeEventHandler(func) \
 354     (wxObjectEventFunction)(wxEventFunction)wxStaticCastEvent(wxTreeEventFunction, &func)
 355
 356 #define wx__DECLARE_TREEEVT(evt, id, fn) \
 357     wx__DECLARE_EVT1(wxEVT_COMMAND_TREE_ ## evt, id, wxTreeEventHandler(fn))
 358
 359 // GetItem() returns the item being dragged, GetPoint() the mouse coords
 360 //
 361 // if you call event.Allow(), the drag operation will start and a
 362 // EVT_TREE_END_DRAG event will be sent when the drag is over.
 363 #define EVT_TREE_BEGIN_DRAG(id, fn) wx__DECLARE_TREEEVT(BEGIN_DRAG, id, fn)
 364 #define EVT_TREE_BEGIN_RDRAG(id, fn) wx__DECLARE_TREEEVT(BEGIN_RDRAG, id, fn)
 365
 366 // GetItem() is the item on which the drop occurred (if any) and GetPoint() the
 367 // current mouse coords
 368 #define EVT_TREE_END_DRAG(id, fn) wx__DECLARE_TREEEVT(END_DRAG, id, fn)
 369
 370 // GetItem() returns the itme whose label is being edited, GetLabel() returns
 371 // the current item label for BEGIN and the would be new one for END.
 372 //
 373 // Vetoing BEGIN event means that label editing won't happen at all,
 374 // vetoing END means that the new value is discarded and the old one kept
 375 #define EVT_TREE_BEGIN_LABEL_EDIT(id, fn) wx__DECLARE_TREEEVT(BEGIN_LABEL_EDIT, id, fn)
 376 #define EVT_TREE_END_LABEL_EDIT(id, fn) wx__DECLARE_TREEEVT(END_LABEL_EDIT, id, fn)
 377
 378 // provide/update information about GetItem() item
 379 #define EVT_TREE_GET_INFO(id, fn) wx__DECLARE_TREEEVT(GET_INFO, id, fn)
 380 #define EVT_TREE_SET_INFO(id, fn) wx__DECLARE_TREEEVT(SET_INFO, id, fn)
 381
 382 // GetItem() is the item being expanded/collapsed, the "ING" versions can use
 383 #define EVT_TREE_ITEM_EXPANDED(id, fn) wx__DECLARE_TREEEVT(ITEM_EXPANDED, id, fn)
 384 #define EVT_TREE_ITEM_EXPANDING(id, fn) wx__DECLARE_TREEEVT(ITEM_EXPANDING, id, fn)
 385 #define EVT_TREE_ITEM_COLLAPSED(id, fn) wx__DECLARE_TREEEVT(ITEM_COLLAPSED, id, fn)
 386 #define EVT_TREE_ITEM_COLLAPSING(id, fn) wx__DECLARE_TREEEVT(ITEM_COLLAPSING, id, fn)
 387
 388 // GetOldItem() is the item which had the selection previously, GetItem() is
 389 // the item which acquires selection
 390 #define EVT_TREE_SEL_CHANGED(id, fn) wx__DECLARE_TREEEVT(SEL_CHANGED, id, fn)
 391 #define EVT_TREE_SEL_CHANGING(id, fn) wx__DECLARE_TREEEVT(SEL_CHANGING, id, fn)
 392
 393 // GetKeyCode() returns the key code
 394 // NB: this is the only message for which GetItem() is invalid (you may get the
 395 //     item from GetSelection())
 396 #define EVT_TREE_KEY_DOWN(id, fn) wx__DECLARE_TREEEVT(KEY_DOWN, id, fn)
 397
 398 // GetItem() returns the item being deleted, the associated data (if any) will
 399 // be deleted just after the return of this event handler (if any)
 400 #define EVT_TREE_DELETE_ITEM(id, fn) wx__DECLARE_TREEEVT(DELETE_ITEM, id, fn)
 401
 402 // GetItem() returns the item that was activated (double click, enter, space)
 403 #define EVT_TREE_ITEM_ACTIVATED(id, fn) wx__DECLARE_TREEEVT(ITEM_ACTIVATED, id, fn)
 404
 405 // GetItem() returns the item for which the context menu shall be shown
 406 #define EVT_TREE_ITEM_MENU(id, fn) wx__DECLARE_TREEEVT(ITEM_MENU, id, fn)
 407
 408 // GetItem() returns the item that was clicked on
 409 #define EVT_TREE_ITEM_RIGHT_CLICK(id, fn) wx__DECLARE_TREEEVT(ITEM_RIGHT_CLICK, id, fn)
 410 #define EVT_TREE_ITEM_MIDDLE_CLICK(id, fn) wx__DECLARE_TREEEVT(ITEM_MIDDLE_CLICK, id, fn)
 411
 412 // GetItem() returns the item whose state image was clicked on
 413 #define EVT_TREE_STATE_IMAGE_CLICK(id, fn) wx__DECLARE_TREEEVT(STATE_IMAGE_CLICK, id, fn)
 414
 415 // GetItem() is the item for which the tooltip is being requested
 416 #define EVT_TREE_ITEM_GETTOOLTIP(id, fn) wx__DECLARE_TREEEVT(ITEM_GETTOOLTIP, id, fn)
 417
 418 #endif // wxUSE_TREECTRL
 419
 420 #endif // _WX_TREEBASE_H_