include/wx/treebase.h

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        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 #ifdef __GNUG__
  16     #pragma interface "treebase.h"
  17 #endif
  18
  19 // ----------------------------------------------------------------------------
  20 // headers
  21 // ----------------------------------------------------------------------------
  22
  23 #if wxUSE_TREECTRL
  24
  25 #include "wx/window.h"  // for wxClientData
  26 #include "wx/event.h"
  27
  28 // ----------------------------------------------------------------------------
  29 // wxTreeItemId identifies an element of the tree. In this implementation, it's
  30 // just a trivial wrapper around Win32 HTREEITEM or a pointer to some private
  31 // data structure in the generic version. It's opaque for the application and
  32 // the only method which can be used by user code is IsOk().
  33 // ----------------------------------------------------------------------------
  34
  35 // Using this typedef removes an ambiguity when calling Remove()
  36 typedef unsigned long wxTreeItemIdValue;
  37
  38 class WXDLLEXPORT wxTreeItemId
  39 {
  40 public:
  41     // ctors
  42         // 0 is invalid value for HTREEITEM
  43     wxTreeItemId() { m_pItem = 0; }
  44
  45         // this one is used in the generic version
  46     wxTreeItemId(void *pItem) { m_pItem = (long) pItem; }
  47
  48         // and this one under MSW
  49     wxTreeItemId(long lItem) { m_pItem = lItem; }
  50
  51         // default copy ctor/assignment operator are ok for us
  52
  53     // accessors
  54         // is this a valid tree item?
  55     bool IsOk() const { return m_pItem != 0; }
  56
  57     // deprecated: only for compatibility
  58     operator wxTreeItemIdValue() const { return m_pItem; }
  59
  60     wxTreeItemIdValue m_pItem;
  61 };
  62
  63 // ----------------------------------------------------------------------------
  64 // wxTreeItemData is some (arbitrary) user class associated with some item. The
  65 // main advantage of having this class (compared to old untyped interface) is
  66 // that wxTreeItemData's are destroyed automatically by the tree and, as this
  67 // class has virtual dtor, it means that the memory will be automatically
  68 // freed. OTOH, we don't just use wxObject instead of wxTreeItemData because
  69 // the size of this class is critical: in any real application, each tree leaf
  70 // will have wxTreeItemData associated with it and number of leaves may be
  71 // quite big.
  72 //
  73 // Because the objects of this class are deleted by the tree, they should
  74 // always be allocated on the heap!
  75 // ----------------------------------------------------------------------------
  76
  77 class WXDLLEXPORT wxTreeItemData: public wxClientData
  78 {
  79 friend class WXDLLEXPORT wxTreeCtrl;
  80 friend class WXDLLEXPORT wxGenericTreeCtrl;
  81 public:
  82     // creation/destruction
  83     // --------------------
  84         // default ctor
  85     wxTreeItemData() { }
  86
  87         // default copy ctor/assignment operator are ok
  88
  89     // accessor: get the item associated with us
  90     const wxTreeItemId& GetId() const { return m_pItem; }
  91     void SetId(const wxTreeItemId& id) { m_pItem = id; }
  92
  93 protected:
  94     wxTreeItemId m_pItem;
  95 };
  96
  97 WX_DEFINE_EXPORTED_ARRAY(wxTreeItemId, wxArrayTreeItemIds);
  98
  99 // ----------------------------------------------------------------------------
 100 // constants
 101 // ----------------------------------------------------------------------------
 102
 103 // enum for different images associated with a treectrl item
 104 enum wxTreeItemIcon
 105 {
 106     wxTreeItemIcon_Normal,              // not selected, not expanded
 107     wxTreeItemIcon_Selected,            //     selected, not expanded
 108     wxTreeItemIcon_Expanded,            // not selected,     expanded
 109     wxTreeItemIcon_SelectedExpanded,    //     selected,     expanded
 110     wxTreeItemIcon_Max
 111 };
 112
 113 /*
 114  * wxTreeCtrl flags
 115  */
 116 // TODO: maybe renumber these?
 117 #define wxTR_NO_BUTTONS      0x0000     // for convenience
 118 #define wxTR_HAS_BUTTONS     0x0001     // generates a +/- button
 119 #define wxTR_TWIST_BUTTONS   0x0002     // generates a twister button
 120 #define wxTR_NO_LINES        0x0004     // don't generate level connectors
 121 #define wxTR_LINES_AT_ROOT   0x0008     // connect top-level nodes
 122 #define wxTR_MAC_BUTTONS     wxTR_TWIST_BUTTONS  // backward compatibility
 123
 124 #define wxTR_SINGLE          0x0000     // for convenience
 125 #define wxTR_MULTIPLE        0x0020     // can select multiple items
 126 #define wxTR_EXTENDED        0x0040     // TODO: allow extended selection
 127
 128 #define wxTR_EDIT_LABELS     0x0200     // can edit item labels
 129 #define wxTR_ROW_LINES       0x0400     // put border around items
 130 #define wxTR_HIDE_ROOT       0x0800     // don't display root node
 131 #define wxTR_HAS_VARIABLE_ROW_HEIGHT 0x0080 // what it says
 132
 133 // TODO: different default styles for wxGTK, wxMotif, whatever?
 134 #ifdef __WXMAC__
 135     #define wxTR_DEFAULT_STYLE (wxTR_TWIST_BUTTONS|wxTR_NO_LINES|wxTR_ROW_LINES)
 136 #else
 137     #define wxTR_DEFAULT_STYLE (wxTR_HAS_BUTTONS|wxTR_LINES_AT_ROOT)
 138 #endif
 139
 140 // values for the `flags' parameter of wxTreeCtrl::HitTest() which determine
 141 // where exactly the specified point is situated:
 142
 143 static const int wxTREE_HITTEST_ABOVE            = 0x0001;
 144 static const int wxTREE_HITTEST_BELOW            = 0x0002;
 145 static const int wxTREE_HITTEST_NOWHERE          = 0x0004;
 146     // on the button associated with an item.
 147 static const int wxTREE_HITTEST_ONITEMBUTTON     = 0x0008;
 148     // on the bitmap associated with an item.
 149 static const int wxTREE_HITTEST_ONITEMICON       = 0x0010;
 150     // on the indent associated with an item.
 151 static const int wxTREE_HITTEST_ONITEMINDENT     = 0x0020;
 152     // on the label (string) associated with an item.
 153 static const int wxTREE_HITTEST_ONITEMLABEL      = 0x0040;
 154     // on the right of the label associated with an item.
 155 static const int wxTREE_HITTEST_ONITEMRIGHT      = 0x0080;
 156     // on the label (string) associated with an item.
 157 static const int wxTREE_HITTEST_ONITEMSTATEICON  = 0x0100;
 158     // on the left of the wxTreeCtrl.
 159 static const int wxTREE_HITTEST_TOLEFT           = 0x0200;
 160     // on the right of the wxTreeCtrl.
 161 static const int wxTREE_HITTEST_TORIGHT          = 0x0400;
 162     // on the upper part (first half) of the item.
 163 static const int wxTREE_HITTEST_ONITEMUPPERPART  = 0x0800;
 164     // on the lower part (second half) of the item.
 165 static const int wxTREE_HITTEST_ONITEMLOWERPART  = 0x1000;
 166
 167     // anywhere on the item
 168 static const int wxTREE_HITTEST_ONITEM  = wxTREE_HITTEST_ONITEMICON |
 169                                           wxTREE_HITTEST_ONITEMLABEL;
 170
 171 // tree ctrl default name
 172 WXDLLEXPORT_DATA(extern const wxChar*) wxTreeCtrlNameStr;
 173
 174 // ----------------------------------------------------------------------------
 175 // wxTreeItemAttr: a structure containing the visual attributes of an item
 176 // ----------------------------------------------------------------------------
 177
 178 class WXDLLEXPORT wxTreeItemAttr
 179 {
 180 public:
 181     // ctors
 182     wxTreeItemAttr() { }
 183     wxTreeItemAttr(const wxColour& colText,
 184                    const wxColour& colBack,
 185                    const wxFont& font)
 186         : m_colText(colText), m_colBack(colBack), m_font(font) { }
 187
 188     // setters
 189     void SetTextColour(const wxColour& colText) { m_colText = colText; }
 190     void SetBackgroundColour(const wxColour& colBack) { m_colBack = colBack; }
 191     void SetFont(const wxFont& font) { m_font = font; }
 192
 193     // accessors
 194     bool HasTextColour() const { return m_colText.Ok(); }
 195     bool HasBackgroundColour() const { return m_colBack.Ok(); }
 196     bool HasFont() const { return m_font.Ok(); }
 197
 198     const wxColour& GetTextColour() const { return m_colText; }
 199     const wxColour& GetBackgroundColour() const { return m_colBack; }
 200     const wxFont& GetFont() const { return m_font; }
 201
 202 private:
 203     wxColour m_colText,
 204              m_colBack;
 205     wxFont   m_font;
 206 };
 207
 208 // ----------------------------------------------------------------------------
 209 // wxTreeEvent is a special class for all events associated with tree controls
 210 //
 211 // NB: note that not all accessors make sense for all events, see the event
 212 //     descriptions below
 213 // ----------------------------------------------------------------------------
 214
 215 class WXDLLEXPORT wxTreeEvent : public wxNotifyEvent
 216 {
 217 public:
 218     wxTreeEvent(wxEventType commandType = wxEVT_NULL, int id = 0);
 219
 220     // accessors
 221         // get the item on which the operation was performed or the newly
 222         // selected item for wxEVT_COMMAND_TREE_SEL_CHANGED/ING events
 223     wxTreeItemId GetItem() const { return m_item; }
 224
 225         // for wxEVT_COMMAND_TREE_SEL_CHANGED/ING events, get the previously
 226         // selected item
 227     wxTreeItemId GetOldItem() const { return m_itemOld; }
 228
 229         // the point where the mouse was when the drag operation started (for
 230         // wxEVT_COMMAND_TREE_BEGIN_(R)DRAG events only) or click position
 231     wxPoint GetPoint() const { return m_pointDrag; }
 232
 233         // keyboard data (for wxEVT_COMMAND_TREE_KEY_DOWN only)
 234     const wxKeyEvent& GetKeyEvent() const { return m_evtKey; }
 235     int GetCode() const { return m_evtKey.GetKeyCode(); }
 236
 237         // label (for EVT_TREE_{BEGIN|END}_LABEL_EDIT only)
 238     const wxString& GetLabel() const { return m_label; }
 239
 240 private:
 241     // not all of the members are used (or initialized) for all events
 242     wxKeyEvent    m_evtKey;
 243     wxTreeItemId  m_item,
 244                   m_itemOld;
 245     wxPoint       m_pointDrag;
 246     wxString      m_label;
 247
 248     friend class WXDLLEXPORT wxTreeCtrl;
 249     friend class WXDLLEXPORT wxGenericTreeCtrl;
 250
 251     DECLARE_DYNAMIC_CLASS(wxTreeEvent);
 252 };
 253
 254 typedef void (wxEvtHandler::*wxTreeEventFunction)(wxTreeEvent&);
 255
 256 // ----------------------------------------------------------------------------
 257 // tree control events and macros for handling them
 258 // ----------------------------------------------------------------------------
 259
 260 BEGIN_DECLARE_EVENT_TYPES()
 261     DECLARE_EVENT_TYPE(wxEVT_COMMAND_TREE_BEGIN_DRAG, 600)
 262     DECLARE_EVENT_TYPE(wxEVT_COMMAND_TREE_BEGIN_RDRAG, 601)
 263     DECLARE_EVENT_TYPE(wxEVT_COMMAND_TREE_BEGIN_LABEL_EDIT, 602)
 264     DECLARE_EVENT_TYPE(wxEVT_COMMAND_TREE_END_LABEL_EDIT, 603)
 265     DECLARE_EVENT_TYPE(wxEVT_COMMAND_TREE_DELETE_ITEM, 604)
 266     DECLARE_EVENT_TYPE(wxEVT_COMMAND_TREE_GET_INFO, 605)
 267     DECLARE_EVENT_TYPE(wxEVT_COMMAND_TREE_SET_INFO, 606)
 268     DECLARE_EVENT_TYPE(wxEVT_COMMAND_TREE_ITEM_EXPANDED, 607)
 269     DECLARE_EVENT_TYPE(wxEVT_COMMAND_TREE_ITEM_EXPANDING, 608)
 270     DECLARE_EVENT_TYPE(wxEVT_COMMAND_TREE_ITEM_COLLAPSED, 609)
 271     DECLARE_EVENT_TYPE(wxEVT_COMMAND_TREE_ITEM_COLLAPSING, 610)
 272     DECLARE_EVENT_TYPE(wxEVT_COMMAND_TREE_SEL_CHANGED, 611)
 273     DECLARE_EVENT_TYPE(wxEVT_COMMAND_TREE_SEL_CHANGING, 612)
 274     DECLARE_EVENT_TYPE(wxEVT_COMMAND_TREE_KEY_DOWN, 613)
 275     DECLARE_EVENT_TYPE(wxEVT_COMMAND_TREE_ITEM_ACTIVATED, 614)
 276     DECLARE_EVENT_TYPE(wxEVT_COMMAND_TREE_ITEM_RIGHT_CLICK, 615)
 277     DECLARE_EVENT_TYPE(wxEVT_COMMAND_TREE_ITEM_MIDDLE_CLICK, 616)
 278     DECLARE_EVENT_TYPE(wxEVT_COMMAND_TREE_END_DRAG, 617)
 279 END_DECLARE_EVENT_TYPES()
 280
 281 // GetItem() returns the item being dragged, GetPoint() the mouse coords
 282 //
 283 // if you call event.Allow(), the drag operation will start and a
 284 // EVT_TREE_END_DRAG event will be sent when the drag is over.
 285 #define EVT_TREE_BEGIN_DRAG(id, fn) DECLARE_EVENT_TABLE_ENTRY( wxEVT_COMMAND_TREE_BEGIN_DRAG, id, -1, (wxObjectEventFunction) (wxEventFunction) (wxTreeEventFunction) & fn, (wxObject *) NULL ),
 286 #define EVT_TREE_BEGIN_RDRAG(id, fn) DECLARE_EVENT_TABLE_ENTRY( wxEVT_COMMAND_TREE_BEGIN_RDRAG, id, -1, (wxObjectEventFunction) (wxEventFunction) (wxTreeEventFunction) & fn, (wxObject *) NULL ),
 287
 288 // GetItem() is the item on which the drop occured (if any) and GetPoint() the
 289 // current mouse coords
 290 #define EVT_TREE_END_DRAG(id, fn) DECLARE_EVENT_TABLE_ENTRY( wxEVT_COMMAND_TREE_END_DRAG, id, -1, (wxObjectEventFunction) (wxEventFunction) (wxTreeEventFunction) & fn, (wxObject *) NULL ),
 291
 292 // GetItem() returns the itme whose label is being edited, GetLabel() returns
 293 // the current item label for BEGIN and the would be new one for END.
 294 //
 295 // Vetoing BEGIN event means that label editing won't happen at all,
 296 // vetoing END means that the new value is discarded and the old one kept
 297 #define EVT_TREE_BEGIN_LABEL_EDIT(id, fn) DECLARE_EVENT_TABLE_ENTRY( wxEVT_COMMAND_TREE_BEGIN_LABEL_EDIT, id, -1, (wxObjectEventFunction) (wxEventFunction) (wxTreeEventFunction) & fn, (wxObject *) NULL ),
 298 #define EVT_TREE_END_LABEL_EDIT(id, fn) DECLARE_EVENT_TABLE_ENTRY( wxEVT_COMMAND_TREE_END_LABEL_EDIT, id, -1, (wxObjectEventFunction) (wxEventFunction) (wxTreeEventFunction) & fn, (wxObject *) NULL ),
 299
 300 // provide/update information about GetItem() item
 301 #define EVT_TREE_GET_INFO(id, fn) DECLARE_EVENT_TABLE_ENTRY( wxEVT_COMMAND_TREE_GET_INFO, id, -1, (wxObjectEventFunction) (wxEventFunction) (wxTreeEventFunction) & fn, (wxObject *) NULL ),
 302 #define EVT_TREE_SET_INFO(id, fn) DECLARE_EVENT_TABLE_ENTRY( wxEVT_COMMAND_TREE_SET_INFO, id, -1, (wxObjectEventFunction) (wxEventFunction) (wxTreeEventFunction) & fn, (wxObject *) NULL ),
 303
 304 // GetItem() is the item being expanded/collapsed, the "ING" versions can use
 305 #define EVT_TREE_ITEM_EXPANDED(id, fn) DECLARE_EVENT_TABLE_ENTRY( wxEVT_COMMAND_TREE_ITEM_EXPANDED, id, -1, (wxObjectEventFunction) (wxEventFunction) (wxTreeEventFunction) & fn, (wxObject *) NULL ),
 306 #define EVT_TREE_ITEM_EXPANDING(id, fn) DECLARE_EVENT_TABLE_ENTRY( wxEVT_COMMAND_TREE_ITEM_EXPANDING, id, -1, (wxObjectEventFunction) (wxEventFunction) (wxTreeEventFunction) & fn, (wxObject *) NULL ),
 307 #define EVT_TREE_ITEM_COLLAPSED(id, fn) DECLARE_EVENT_TABLE_ENTRY( wxEVT_COMMAND_TREE_ITEM_COLLAPSED, id, -1, (wxObjectEventFunction) (wxEventFunction) (wxTreeEventFunction) & fn, (wxObject *) NULL ),
 308 #define EVT_TREE_ITEM_COLLAPSING(id, fn) DECLARE_EVENT_TABLE_ENTRY( wxEVT_COMMAND_TREE_ITEM_COLLAPSING, id, -1, (wxObjectEventFunction) (wxEventFunction) (wxTreeEventFunction) & fn, NULL ),
 309
 310 // GetOldItem() is the item which had the selection previously, GetItem() is
 311 // the item which acquires selection
 312 #define EVT_TREE_SEL_CHANGED(id, fn) DECLARE_EVENT_TABLE_ENTRY( wxEVT_COMMAND_TREE_SEL_CHANGED, id, -1, (wxObjectEventFunction) (wxEventFunction) (wxTreeEventFunction) & fn, NULL ),
 313 #define EVT_TREE_SEL_CHANGING(id, fn) DECLARE_EVENT_TABLE_ENTRY( wxEVT_COMMAND_TREE_SEL_CHANGING, id, -1, (wxObjectEventFunction) (wxEventFunction) (wxTreeEventFunction) & fn, NULL ),
 314
 315 // GetCode() returns the key code
 316 // NB: this is the only message for which GetItem() is invalid (you may get the
 317 //     item from GetSelection())
 318 #define EVT_TREE_KEY_DOWN(id, fn) DECLARE_EVENT_TABLE_ENTRY( wxEVT_COMMAND_TREE_KEY_DOWN, id, -1, (wxObjectEventFunction) (wxEventFunction) (wxTreeEventFunction) & fn, NULL ),
 319
 320 // GetItem() returns the item being deleted, the associated data (if any) will
 321 // be deleted just after the return of this event handler (if any)
 322 #define EVT_TREE_DELETE_ITEM(id, fn) DECLARE_EVENT_TABLE_ENTRY( wxEVT_COMMAND_TREE_DELETE_ITEM, id, -1, (wxObjectEventFunction) (wxEventFunction) (wxTreeEventFunction) & fn, (wxObject *) NULL ),
 323
 324 // GetItem() returns the item that was activated (double click, enter, space)
 325 #define EVT_TREE_ITEM_ACTIVATED(id, fn) DECLARE_EVENT_TABLE_ENTRY( wxEVT_COMMAND_TREE_ITEM_ACTIVATED, id, -1, (wxObjectEventFunction) (wxEventFunction) (wxTreeEventFunction) & fn, NULL ),
 326
 327 // GetItem() returns the item that was clicked on
 328 #define EVT_TREE_ITEM_RIGHT_CLICK(id, fn) DECLARE_EVENT_TABLE_ENTRY( wxEVT_COMMAND_TREE_ITEM_RIGHT_CLICK, id, -1, (wxObjectEventFunction) (wxEventFunction) (wxTreeEventFunction) & fn, NULL ),
 329 #define EVT_TREE_ITEM_MIDDLE_CLICK(id, fn) DECLARE_EVENT_TABLE_ENTRY( wxEVT_COMMAND_TREE_ITEM_MIDDLE_CLICK, id, -1, (wxObjectEventFunction) (wxEventFunction) (wxTreeEventFunction) & fn, NULL ),
 330
 331 #endif // wxUSE_TREECTRL
 332
 333 #endif // _WX_TREEBASE_H_
 334