include/wx/univ/listbox.h

   1 ///////////////////////////////////////////////////////////////////////////////
   2 // Name:        wx/univ/listbox.h
   3 // Purpose:     the universal listbox
   4 // Author:      Vadim Zeitlin
   5 // Modified by:
   6 // Created:     30.08.00
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) 2000 Vadim Zeitlin <zeitlin@dptmaths.ens-cachan.fr>
   9 // Licence:     wxWindows licence
  10 ///////////////////////////////////////////////////////////////////////////////
  11
  12 #ifndef _WX_UNIV_LISTBOX_H_
  13 #define _WX_UNIV_LISTBOX_H_
  14
  15 #include "wx/scrolwin.h"    // for wxScrollHelper
  16 #include "wx/dynarray.h"
  17 #include "wx/arrstr.h"
  18
  19 // ----------------------------------------------------------------------------
  20 // the actions supported by this control
  21 // ----------------------------------------------------------------------------
  22
  23 // change the current item
  24 #define wxACTION_LISTBOX_SETFOCUS   _T("setfocus")  // select the item
  25 #define wxACTION_LISTBOX_MOVEDOWN   _T("down")      // select item below
  26 #define wxACTION_LISTBOX_MOVEUP     _T("up")        // select item above
  27 #define wxACTION_LISTBOX_PAGEDOWN   _T("pagedown")  // go page down
  28 #define wxACTION_LISTBOX_PAGEUP     _T("pageup")    // go page up
  29 #define wxACTION_LISTBOX_START      _T("start")     // go to first item
  30 #define wxACTION_LISTBOX_END        _T("end")       // go to last item
  31 #define wxACTION_LISTBOX_FIND       _T("find")      // find item by 1st letter
  32
  33 // do something with the current item
  34 #define wxACTION_LISTBOX_ACTIVATE   _T("activate")  // activate (choose)
  35 #define wxACTION_LISTBOX_TOGGLE     _T("toggle")    // togglee selected state
  36 #define wxACTION_LISTBOX_SELECT     _T("select")    // sel this, unsel others
  37 #define wxACTION_LISTBOX_SELECTADD  _T("selectadd") // add to selection
  38 #define wxACTION_LISTBOX_UNSELECT   _T("unselect")  // unselect
  39 #define wxACTION_LISTBOX_ANCHOR     _T("selanchor") // anchor selection
  40
  41 // do something with the selection globally (not for single selection ones)
  42 #define wxACTION_LISTBOX_SELECTALL   _T("selectall")   // select all items
  43 #define wxACTION_LISTBOX_UNSELECTALL _T("unselectall") // unselect all items
  44 #define wxACTION_LISTBOX_SELTOGGLE   _T("togglesel")   // invert the selection
  45 #define wxACTION_LISTBOX_EXTENDSEL   _T("extend")      // extend to item
  46
  47 // ----------------------------------------------------------------------------
  48 // wxListBox: a list of selectable items
  49 // ----------------------------------------------------------------------------
  50
  51 class WXDLLEXPORT wxListBox : public wxListBoxBase, public wxScrollHelper
  52 {
  53 public:
  54     // ctors and such
  55     wxListBox() : wxScrollHelper(this) { Init(); }
  56     wxListBox(wxWindow *parent,
  57               wxWindowID id,
  58               const wxPoint& pos = wxDefaultPosition,
  59               const wxSize& size = wxDefaultSize,
  60               int n = 0, const wxString choices[] = (const wxString *) NULL,
  61               long style = 0,
  62               const wxValidator& validator = wxDefaultValidator,
  63               const wxString& name = wxListBoxNameStr )
  64         : wxScrollHelper(this)
  65     {
  66         Init();
  67
  68         Create(parent, id, pos, size, n, choices, style, validator, name);
  69     }
  70     wxListBox(wxWindow *parent,
  71               wxWindowID id,
  72               const wxPoint& pos,
  73               const wxSize& size,
  74               const wxArrayString& choices,
  75               long style = 0,
  76               const wxValidator& validator = wxDefaultValidator,
  77               const wxString& name = wxListBoxNameStr );
  78
  79     virtual ~wxListBox();
  80
  81     bool Create(wxWindow *parent,
  82                 wxWindowID id,
  83                 const wxPoint& pos = wxDefaultPosition,
  84                 const wxSize& size = wxDefaultSize,
  85                 int n = 0, const wxString choices[] = (const wxString *) NULL,
  86                 long style = 0,
  87                 const wxValidator& validator = wxDefaultValidator,
  88                 const wxString& name = wxListBoxNameStr);
  89     bool Create(wxWindow *parent,
  90                 wxWindowID id,
  91                 const wxPoint& pos,
  92                 const wxSize& size,
  93                 const wxArrayString& choices,
  94                 long style = 0,
  95                 const wxValidator& validator = wxDefaultValidator,
  96                 const wxString& name = wxListBoxNameStr);
  97
  98     // implement the listbox interface defined by wxListBoxBase
  99     virtual void Clear();
 100     virtual void Delete(unsigned int n);
 101
 102     virtual unsigned int GetCount() const
 103         { return (unsigned int)m_strings->GetCount(); }
 104     virtual wxString GetString(unsigned int n) const
 105         { return m_strings->Item(n); }
 106     virtual void SetString(unsigned int n, const wxString& s);
 107     virtual int FindString(const wxString& s, bool bCase = false) const
 108         { return m_strings->Index(s, bCase); }
 109
 110     virtual bool IsSelected(int n) const
 111         { return m_selections.Index(n) != wxNOT_FOUND; }
 112     virtual int GetSelection() const;
 113     virtual int GetSelections(wxArrayInt& aSelections) const;
 114
 115 protected:
 116     virtual void DoSetSelection(int n, bool select);
 117     virtual int DoAppendOnly(const wxString& item);
 118     virtual int DoAppend(const wxString& item);
 119     virtual void DoInsertItems(const wxArrayString& items, unsigned int pos);
 120     virtual void DoSetItems(const wxArrayString& items, void **clientData);
 121
 122     virtual void DoSetFirstItem(int n);
 123
 124     virtual void DoSetItemClientData(unsigned int n, void* clientData);
 125     virtual void* DoGetItemClientData(unsigned int n) const;
 126     virtual void DoSetItemClientObject(unsigned int n, wxClientData* clientData);
 127     virtual wxClientData* DoGetItemClientObject(unsigned int n) const;
 128
 129 public:
 130     // override some more base class methods
 131     virtual bool SetFont(const wxFont& font);
 132
 133     // the wxUniversal-specific methods
 134     // --------------------------------
 135
 136     // the current item is the same as the selected one for wxLB_SINGLE
 137     // listboxes but for the other ones it is just the focused item which may
 138     // be selected or not
 139     int GetCurrentItem() const { return m_current; }
 140     void SetCurrentItem(int n);
 141
 142     // select the item which is diff items below the current one
 143     void ChangeCurrent(int diff);
 144
 145     // activate (i.e. send a LISTBOX_DOUBLECLICKED message) the specified or
 146     // current (if -1) item
 147     void Activate(int item = -1);
 148
 149     // select or unselect the specified or current (if -1) item
 150     void DoSelect(int item = -1, bool sel = true);
 151
 152     // more readable wrapper
 153     void DoUnselect(int item) { DoSelect(item, false); }
 154
 155     // select an item and send a notification about it
 156     void SelectAndNotify(int item);
 157
 158     // ensure that the given item is visible by scrolling it into view
 159     virtual void EnsureVisible(int n);
 160
 161     // find the first item [strictly] after the current one which starts with
 162     // the given string and make it the current one, return true if the current
 163     // item changed
 164     bool FindItem(const wxString& prefix, bool strictlyAfter = false);
 165     bool FindNextItem(const wxString& prefix) { return FindItem(prefix, true); }
 166
 167     // extend the selection to span the range from the anchor (see below) to
 168     // the specified or current item
 169     void ExtendSelection(int itemTo = -1);
 170
 171     // make this item the new selection anchor: extending selection with
 172     // ExtendSelection() will work with it
 173     void AnchorSelection(int itemFrom) { m_selAnchor = itemFrom; }
 174
 175     // get, calculating it if necessary, the number of items per page, the
 176     // height of each line and the max width of an item
 177     int GetItemsPerPage() const;
 178     wxCoord GetLineHeight() const;
 179     wxCoord GetMaxWidth() const;
 180
 181     // override the wxControl virtual methods
 182     virtual bool PerformAction(const wxControlAction& action,
 183                                long numArg = 0l,
 184                                const wxString& strArg = wxEmptyString);
 185
 186     static wxInputHandler *GetStdInputHandler(wxInputHandler *handlerDef);
 187     virtual wxInputHandler *DoGetStdInputHandler(wxInputHandler *handlerDef)
 188     {
 189         return GetStdInputHandler(handlerDef);
 190     }
 191
 192     // idle processing
 193     virtual void OnInternalIdle();
 194
 195 protected:
 196     // geometry
 197     virtual wxSize DoGetBestClientSize() const;
 198     virtual void DoSetSize(int x, int y,
 199                            int width, int height,
 200                            int sizeFlags = wxSIZE_AUTO);
 201
 202     virtual void DoDraw(wxControlRenderer *renderer);
 203     virtual wxBorder GetDefaultBorder() const;
 204
 205     // common part of all ctors
 206     void Init();
 207
 208     // event handlers
 209     void OnSize(wxSizeEvent& event);
 210
 211     // common part of Clear() and DoSetItems(): clears everything
 212     virtual void DoClear();
 213
 214     // refresh the given item(s) or everything
 215     void RefreshItems(int from, int count);
 216     void RefreshItem(int n);
 217     void RefreshFromItemToEnd(int n);
 218     void RefreshAll();
 219
 220     // send an event of the given type (using m_current by default)
 221     bool SendEvent(wxEventType type, int item = -1);
 222
 223     // calculate the number of items per page using our current size
 224     void CalcItemsPerPage();
 225
 226     // can/should we have a horz scrollbar?
 227     bool HasHorzScrollbar() const
 228         { return (m_windowStyle & wxLB_HSCROLL) != 0; }
 229
 230     // redraw the items in the given range only: called from DoDraw()
 231     virtual void DoDrawRange(wxControlRenderer *renderer,
 232                              int itemFirst, int itemLast);
 233
 234     // update the scrollbars and then ensure that the item is visible
 235     void DoEnsureVisible(int n);
 236
 237     // mark horz scrollbar for updating
 238     void RefreshHorzScrollbar();
 239
 240     // update (show/hide/adjust) the scrollbars
 241     void UpdateScrollbars();
 242
 243     // refresh the items specified by m_updateCount and m_updateFrom
 244     void UpdateItems();
 245
 246     // the array containing all items (it is sorted if the listbox has
 247     // wxLB_SORT style)
 248     wxArrayString* m_strings;
 249
 250     // this array contains the indices of the selected items (for the single
 251     // selection listboxes only the first element of it is used and contains
 252     // the current selection)
 253     wxArrayInt m_selections;
 254
 255     // and this one the client data (either void or wxClientData)
 256     wxArrayPtrVoid m_itemsClientData;
 257
 258     // the current item
 259     int m_current;
 260
 261 private:
 262     // the range of elements which must be updated: if m_updateCount is 0 no
 263     // update is needed, if it is -1 everything must be updated, otherwise
 264     // m_updateCount items starting from m_updateFrom have to be redrawn
 265     int m_updateFrom,
 266         m_updateCount;
 267
 268     // the height of one line in the listbox (all lines have the same height)
 269     wxCoord m_lineHeight;
 270
 271     // the maximal width of a listbox item and the item which has it
 272     wxCoord m_maxWidth;
 273     int m_maxWidthItem;
 274
 275     // the extents of horz and vert scrollbars
 276     int m_scrollRangeX,
 277         m_scrollRangeY;
 278
 279     // the number of items per page
 280     size_t m_itemsPerPage;
 281
 282     // if the number of items has changed we may need to show/hide the
 283     // scrollbar
 284     bool m_updateScrollbarX, m_updateScrollbarY,
 285          m_showScrollbarX, m_showScrollbarY;
 286
 287     // if the current item has changed, we might need to scroll if it went out
 288     // of the window
 289     bool m_currentChanged;
 290
 291     // the anchor from which the selection is extended for the listboxes with
 292     // wxLB_EXTENDED style - this is set to the last item which was selected
 293     // by not extending the selection but by choosing it directly
 294     int m_selAnchor;
 295
 296     DECLARE_EVENT_TABLE()
 297     DECLARE_DYNAMIC_CLASS(wxListBox)
 298 };
 299
 300 #endif // _WX_UNIV_LISTBOX_H_