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() { 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     {
  65         Init();
  66
  67         Create(parent, id, pos, size, n, choices, style, validator, name);
  68     }
  69     wxListBox(wxWindow *parent,
  70               wxWindowID id,
  71               const wxPoint& pos,
  72               const wxSize& size,
  73               const wxArrayString& choices,
  74               long style = 0,
  75               const wxValidator& validator = wxDefaultValidator,
  76               const wxString& name = wxListBoxNameStr );
  77
  78     virtual ~wxListBox();
  79
  80     bool Create(wxWindow *parent,
  81                 wxWindowID id,
  82                 const wxPoint& pos = wxDefaultPosition,
  83                 const wxSize& size = wxDefaultSize,
  84                 int n = 0, const wxString choices[] = (const wxString *) NULL,
  85                 long style = 0,
  86                 const wxValidator& validator = wxDefaultValidator,
  87                 const wxString& name = wxListBoxNameStr);
  88     bool Create(wxWindow *parent,
  89                 wxWindowID id,
  90                 const wxPoint& pos,
  91                 const wxSize& size,
  92                 const wxArrayString& choices,
  93                 long style = 0,
  94                 const wxValidator& validator = wxDefaultValidator,
  95                 const wxString& name = wxListBoxNameStr);
  96
  97     // implement the listbox interface defined by wxListBoxBase
  98     virtual void Clear();
  99     virtual void Delete(int n);
 100
 101     virtual int GetCount() const
 102         { return (int)m_strings->GetCount(); }
 103     virtual wxString GetString(int n) const
 104         { return m_strings->Item(n); }
 105     virtual void SetString(int n, const wxString& s);
 106     virtual int FindString(const wxString& s) const
 107         { return m_strings->Index(s); }
 108
 109     virtual bool IsSelected(int n) const
 110         { return m_selections.Index(n) != wxNOT_FOUND; }
 111     virtual void DoSetSelection(int n, bool select);
 112     virtual int GetSelection() const;
 113     virtual int GetSelections(wxArrayInt& aSelections) const;
 114
 115 protected:
 116     virtual int DoAppendOnly(const wxString& item);
 117     virtual int DoAppend(const wxString& item);
 118     virtual void DoInsertItems(const wxArrayString& items, int pos);
 119     virtual void DoSetItems(const wxArrayString& items, void **clientData);
 120
 121     virtual void DoSetFirstItem(int n);
 122
 123     virtual void DoSetItemClientData(int n, void* clientData);
 124     virtual void* DoGetItemClientData(int n) const;
 125     virtual void DoSetItemClientObject(int n, wxClientData* clientData);
 126     virtual wxClientData* DoGetItemClientObject(int n) const;
 127
 128 public:
 129     // override some more base class methods
 130     virtual bool SetFont(const wxFont& font);
 131
 132     // the wxUniversal-specific methods
 133     // --------------------------------
 134
 135     // the current item is the same as the selected one for wxLB_SINGLE
 136     // listboxes but for the other ones it is just the focused item which may
 137     // be selected or not
 138     int GetCurrentItem() const { return m_current; }
 139     void SetCurrentItem(int n);
 140
 141     // select the item which is diff items below the current one
 142     void ChangeCurrent(int diff);
 143
 144     // activate (i.e. send a LISTBOX_DOUBLECLICKED message) the specified or
 145     // current (if -1) item
 146     void Activate(int item = -1);
 147
 148     // select or unselect the specified or current (if -1) item
 149     void DoSelect(int item = -1, bool sel = true);
 150
 151     // more readable wrapper
 152     void DoUnselect(int item) { DoSelect(item, false); }
 153
 154     // select an item and send a notification about it
 155     void SelectAndNotify(int item);
 156
 157     // ensure that the given item is visible by scrolling it into view
 158     virtual void EnsureVisible(int n);
 159
 160     // find the first item [strictly] after the current one which starts with
 161     // the given string and make it the current one, return true if the current
 162     // item changed
 163     bool FindItem(const wxString& prefix, bool strictlyAfter = false);
 164     bool FindNextItem(const wxString& prefix) { return FindItem(prefix, true); }
 165
 166     // extend the selection to span the range from the anchor (see below) to
 167     // the specified or current item
 168     void ExtendSelection(int itemTo = -1);
 169
 170     // make this item the new selection anchor: extending selection with
 171     // ExtendSelection() will work with it
 172     void AnchorSelection(int itemFrom) { m_selAnchor = itemFrom; }
 173
 174     // get, calculating it if necessary, the number of items per page, the
 175     // height of each line and the max width of an item
 176     int GetItemsPerPage() const;
 177     wxCoord GetLineHeight() const;
 178     wxCoord GetMaxWidth() const;
 179
 180     // override the wxControl virtual methods
 181     virtual bool PerformAction(const wxControlAction& action,
 182                                long numArg = 0l,
 183                                const wxString& strArg = wxEmptyString);
 184
 185     // idle processing
 186     virtual void OnInternalIdle();
 187
 188 protected:
 189     // geometry
 190     virtual wxSize DoGetBestClientSize() const;
 191     virtual void DoSetSize(int x, int y,
 192                            int width, int height,
 193                            int sizeFlags = wxSIZE_AUTO);
 194
 195     virtual void DoDraw(wxControlRenderer *renderer);
 196     virtual wxBorder GetDefaultBorder() const;
 197
 198     // common part of all ctors
 199     void Init();
 200
 201     // event handlers
 202     void OnSize(wxSizeEvent& event);
 203
 204     // common part of Clear() and DoSetItems(): clears everything
 205     virtual void DoClear();
 206
 207     // refresh the given item(s) or everything
 208     void RefreshItems(int from, int count);
 209     void RefreshItem(int n);
 210     void RefreshFromItemToEnd(int n);
 211     void RefreshAll();
 212
 213     // send an event of the given type (using m_current by default)
 214     bool SendEvent(wxEventType type, int item = -1);
 215
 216     // calculate the number of items per page using our current size
 217     void CalcItemsPerPage();
 218
 219     // can/should we have a horz scrollbar?
 220     bool HasHorzScrollbar() const
 221         { return (m_windowStyle & wxLB_HSCROLL) != 0; }
 222
 223     // redraw the items in the given range only: called from DoDraw()
 224     virtual void DoDrawRange(wxControlRenderer *renderer,
 225                              int itemFirst, int itemLast);
 226
 227     // update the scrollbars and then ensure that the item is visible
 228     void DoEnsureVisible(int n);
 229
 230     // mark horz scrollbar for updating
 231     void RefreshHorzScrollbar();
 232
 233     // update (show/hide/adjust) the scrollbars
 234     void UpdateScrollbars();
 235
 236     // refresh the items specified by m_updateCount and m_updateFrom
 237     void UpdateItems();
 238
 239     // the array containing all items (it is sorted if the listbox has
 240     // wxLB_SORT style)
 241     wxArrayString* m_strings;
 242
 243     // this array contains the indices of the selected items (for the single
 244     // selection listboxes only the first element of it is used and contains
 245     // the current selection)
 246     wxArrayInt m_selections;
 247
 248     // and this one the client data (either void or wxClientData)
 249     wxArrayPtrVoid m_itemsClientData;
 250
 251     // the current item
 252     int m_current;
 253
 254 private:
 255     // the range of elements which must be updated: if m_updateCount is 0 no
 256     // update is needed, if it is -1 everything must be updated, otherwise
 257     // m_updateCount items starting from m_updateFrom have to be redrawn
 258     int m_updateFrom,
 259         m_updateCount;
 260
 261     // the height of one line in the listbox (all lines have the same height)
 262     wxCoord m_lineHeight;
 263
 264     // the maximal width of a listbox item and the item which has it
 265     wxCoord m_maxWidth;
 266     int m_maxWidthItem;
 267
 268     // the extents of horz and vert scrollbars
 269     int m_scrollRangeX,
 270         m_scrollRangeY;
 271
 272     // the number of items per page
 273     size_t m_itemsPerPage;
 274
 275     // if the number of items has changed we may need to show/hide the
 276     // scrollbar
 277     bool m_updateScrollbarX, m_updateScrollbarY,
 278          m_showScrollbarX, m_showScrollbarY;
 279
 280     // if the current item has changed, we might need to scroll if it went out
 281     // of the window
 282     bool m_currentChanged;
 283
 284     // the anchor from which the selection is extended for the listboxes with
 285     // wxLB_EXTENDED style - this is set to the last item which was selected
 286     // by not extending the selection but by choosing it directly
 287     int m_selAnchor;
 288
 289     DECLARE_EVENT_TABLE()
 290     DECLARE_DYNAMIC_CLASS(wxListBox)
 291 };
 292
 293 // ----------------------------------------------------------------------------
 294 // wxStdListboxInputHandler: handles mouse and kbd in a single or multi
 295 // selection listbox
 296 // ----------------------------------------------------------------------------
 297
 298 class WXDLLEXPORT wxStdListboxInputHandler : public wxStdInputHandler
 299 {
 300 public:
 301     // if pressing the mouse button in a multiselection listbox should toggle
 302     // the item under mouse immediately, then specify true as the second
 303     // parameter (this is the standard behaviour, under GTK the item is toggled
 304     // only when the mouse is released in the multi selection listbox)
 305     wxStdListboxInputHandler(wxInputHandler *inphand,
 306                              bool toggleOnPressAlways = true);
 307
 308     // base class methods
 309     virtual bool HandleKey(wxInputConsumer *consumer,
 310                            const wxKeyEvent& event,
 311                            bool pressed);
 312     virtual bool HandleMouse(wxInputConsumer *consumer,
 313                              const wxMouseEvent& event);
 314     virtual bool HandleMouseMove(wxInputConsumer *consumer,
 315                                  const wxMouseEvent& event);
 316
 317 protected:
 318     // return the item under mouse, 0 if the mouse is above the listbox or
 319     // GetCount() if it is below it
 320     int HitTest(const wxListBox *listbox, const wxMouseEvent& event);
 321
 322     // parts of HitTest(): first finds the pseudo (because not in range) index
 323     // of the item and the second one adjusts it if necessary - that is if the
 324     // third one returns false
 325     int HitTestUnsafe(const wxListBox *listbox, const wxMouseEvent& event);
 326     int FixItemIndex(const wxListBox *listbox, int item);
 327     bool IsValidIndex(const wxListBox *listbox, int item);
 328
 329     // init m_btnCapture and m_actionMouse
 330     wxControlAction SetupCapture(wxListBox *lbox,
 331                                  const wxMouseEvent& event,
 332                                  int item);
 333
 334     wxRenderer *m_renderer;
 335
 336     // the button which initiated the mouse capture (currently 0 or 1)
 337     int m_btnCapture;
 338
 339     // the action to perform when the mouse moves while we capture it
 340     wxControlAction m_actionMouse;
 341
 342     // the ctor parameter toggleOnPressAlways (see comments near it)
 343     bool m_toggleOnPressAlways;
 344
 345     // do we track the mouse outside the window when it is captured?
 346     bool m_trackMouseOutside;
 347 };
 348
 349 #endif // _WX_UNIV_LISTBOX_H_