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