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 #if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
  16     #pragma interface "univlistbox.h"
  17 #endif
  18
  19 #include "wx/scrolwin.h"    // for wxScrollHelper
  20 #include "wx/dynarray.h"
  21 #include "wx/arrstr.h"
  22
  23 // ----------------------------------------------------------------------------
  24 // the actions supported by this control
  25 // ----------------------------------------------------------------------------
  26
  27 // change the current item
  28 #define wxACTION_LISTBOX_SETFOCUS   _T("setfocus")  // select the item
  29 #define wxACTION_LISTBOX_MOVEDOWN   _T("down")      // select item below
  30 #define wxACTION_LISTBOX_MOVEUP     _T("up")        // select item above
  31 #define wxACTION_LISTBOX_PAGEDOWN   _T("pagedown")  // go page down
  32 #define wxACTION_LISTBOX_PAGEUP     _T("pageup")    // go page up
  33 #define wxACTION_LISTBOX_START      _T("start")     // go to first item
  34 #define wxACTION_LISTBOX_END        _T("end")       // go to last item
  35 #define wxACTION_LISTBOX_FIND       _T("find")      // find item by 1st letter
  36
  37 // do something with the current item
  38 #define wxACTION_LISTBOX_ACTIVATE   _T("activate")  // activate (choose)
  39 #define wxACTION_LISTBOX_TOGGLE     _T("toggle")    // togglee selected state
  40 #define wxACTION_LISTBOX_SELECT     _T("select")    // sel this, unsel others
  41 #define wxACTION_LISTBOX_SELECTADD  _T("selectadd") // add to selection
  42 #define wxACTION_LISTBOX_UNSELECT   _T("unselect")  // unselect
  43 #define wxACTION_LISTBOX_ANCHOR     _T("selanchor") // anchor selection
  44
  45 // do something with the selection globally (not for single selection ones)
  46 #define wxACTION_LISTBOX_SELECTALL   _T("selectall")   // select all items
  47 #define wxACTION_LISTBOX_UNSELECTALL _T("unselectall") // unselect all items
  48 #define wxACTION_LISTBOX_SELTOGGLE   _T("togglesel")   // invert the selection
  49 #define wxACTION_LISTBOX_EXTENDSEL   _T("extend")      // extend to item
  50
  51 // ----------------------------------------------------------------------------
  52 // wxListBox: a list of selectable items
  53 // ----------------------------------------------------------------------------
  54
  55 class WXDLLEXPORT wxListBox : public wxListBoxBase, public wxScrollHelper
  56 {
  57 public:
  58     // ctors and such
  59     wxListBox() { Init(); }
  60     wxListBox(wxWindow *parent,
  61               wxWindowID id,
  62               const wxPoint& pos = wxDefaultPosition,
  63               const wxSize& size = wxDefaultSize,
  64               int n = 0, const wxString choices[] = (const wxString *) NULL,
  65               long style = 0,
  66               const wxValidator& validator = wxDefaultValidator,
  67               const wxString& name = wxListBoxNameStr )
  68     {
  69         Init();
  70
  71         Create(parent, id, pos, size, n, choices, style, validator, name);
  72     }
  73
  74     virtual ~wxListBox();
  75
  76     bool Create(wxWindow *parent,
  77                 wxWindowID id,
  78                 const wxPoint& pos = wxDefaultPosition,
  79                 const wxSize& size = wxDefaultSize,
  80                 int n = 0, const wxString choices[] = (const wxString *) NULL,
  81                 long style = 0,
  82                 const wxValidator& validator = wxDefaultValidator,
  83                 const wxString& name = wxListBoxNameStr);
  84
  85     // implement the listbox interface defined by wxListBoxBase
  86     virtual void Clear();
  87     virtual void Delete(int n);
  88
  89     virtual int GetCount() const { return (int)m_strings->GetCount(); }
  90     virtual wxString GetString(int n) const { return (*m_strings)[n]; }
  91     virtual void SetString(int n, const wxString& s);
  92     virtual int FindString(const wxString& s) const
  93         { return IsSorted() ? m_stringsSorted->Index(s) : m_strings->Index(s); }
  94
  95     virtual bool IsSelected(int n) const
  96         { return m_selections.Index(n) != wxNOT_FOUND; }
  97     virtual void SetSelection(int n, bool select = TRUE);
  98     virtual int GetSelection() const;
  99     virtual int GetSelections(wxArrayInt& aSelections) const;
 100
 101 protected:
 102     virtual int DoAppend(const wxString& item);
 103     virtual void DoInsertItems(const wxArrayString& items, int pos);
 104     virtual void DoSetItems(const wxArrayString& items, void **clientData);
 105
 106     virtual void DoSetFirstItem(int n);
 107
 108     virtual void DoSetItemClientData(int n, void* clientData);
 109     virtual void* DoGetItemClientData(int n) const;
 110     virtual void DoSetItemClientObject(int n, wxClientData* clientData);
 111     virtual wxClientData* DoGetItemClientObject(int n) const;
 112
 113 public:
 114     // override some more base class methods
 115     virtual bool SetFont(const wxFont& font);
 116
 117     // the wxUniversal-specific methods
 118     // --------------------------------
 119
 120     // the current item is the same as the selected one for wxLB_SINGLE
 121     // listboxes but for the other ones it is just the focused item which may
 122     // be selected or not
 123     int GetCurrentItem() const { return m_current; }
 124     void SetCurrentItem(int n);
 125
 126     // select the item which is diff items below the current one
 127     void ChangeCurrent(int diff);
 128
 129     // activate (i.e. send a LISTBOX_DOUBLECLICKED message) the specified or
 130     // current (if -1) item
 131     void Activate(int item = -1);
 132
 133     // select or unselect the specified or current (if -1) item
 134     void DoSelect(int item = -1, bool sel = TRUE);
 135
 136     // more readable wrapper
 137     void DoUnselect(int item) { DoSelect(item, FALSE); }
 138
 139     // select an item and send a notification about it
 140     void SelectAndNotify(int item);
 141
 142     // ensure that the given item is visible by scrolling it into view
 143     virtual void EnsureVisible(int n);
 144
 145     // find the first item [strictly] after the current one which starts with
 146     // the given string and make it the current one, return TRUE if the current
 147     // item changed
 148     bool FindItem(const wxString& prefix, bool strictlyAfter = FALSE);
 149     bool FindNextItem(const wxString& prefix) { return FindItem(prefix, TRUE); }
 150
 151     // extend the selection to span the range from the anchor (see below) to
 152     // the specified or current item
 153     void ExtendSelection(int itemTo = -1);
 154
 155     // make this item the new selection anchor: extending selection with
 156     // ExtendSelection() will work with it
 157     void AnchorSelection(int itemFrom) { m_selAnchor = itemFrom; }
 158
 159     // get, calculating it if necessary, the number of items per page, the
 160     // height of each line and the max width of an item
 161     int GetItemsPerPage() const;
 162     wxCoord GetLineHeight() const;
 163     wxCoord GetMaxWidth() const;
 164
 165     // override the wxControl virtual methods
 166     virtual bool PerformAction(const wxControlAction& action,
 167                                long numArg = 0l,
 168                                const wxString& strArg = wxEmptyString);
 169
 170     // idle processing
 171     virtual void OnInternalIdle();
 172
 173 protected:
 174     // geometry
 175     virtual wxSize DoGetBestClientSize() const;
 176     virtual void DoSetSize(int x, int y,
 177                            int width, int height,
 178                            int sizeFlags = wxSIZE_AUTO);
 179
 180     virtual void DoDraw(wxControlRenderer *renderer);
 181     virtual wxBorder GetDefaultBorder() const;
 182
 183     // common part of all ctors
 184     void Init();
 185
 186     // event handlers
 187     void OnSize(wxSizeEvent& event);
 188
 189     // common part of Clear() and DoSetItems(): clears everything
 190     virtual void DoClear();
 191
 192     // refresh the given item(s) or everything
 193     void RefreshItems(int from, int count);
 194     void RefreshItem(int n);
 195     void RefreshFromItemToEnd(int n);
 196     void RefreshAll();
 197
 198     // send an event of the given type (using m_current by default)
 199     bool SendEvent(wxEventType type, int item = -1);
 200
 201     // calculate the number of items per page using our current size
 202     void CalcItemsPerPage();
 203
 204     // can/should we have a horz scrollbar?
 205     bool HasHorzScrollbar() const
 206         { return (m_windowStyle & wxLB_HSCROLL) != 0; }
 207
 208     // redraw the items in the given range only: called from DoDraw()
 209     virtual void DoDrawRange(wxControlRenderer *renderer,
 210                              int itemFirst, int itemLast);
 211
 212     // update the scrollbars and then ensure that the item is visible
 213     void DoEnsureVisible(int n);
 214
 215     // mark horz scrollbar for updating
 216     void RefreshHorzScrollbar();
 217
 218     // update (show/hide/adjust) the scrollbars
 219     void UpdateScrollbars();
 220
 221     // refresh the items specified by m_updateCount and m_updateFrom
 222     void UpdateItems();
 223
 224     // the array containing all items (it is sorted if the listbox has
 225     // wxLB_SORT style). Note the evil trick: the pointers share the
 226     // same location, hence we use m_strings when we don't care if the
 227     // array is sorted or not, m_stringsSorted when we do
 228     union
 229     {
 230         wxArrayString* m_strings;
 231         wxSortedArrayString* m_stringsSorted;
 232     };
 233
 234     // this array contains the indices of the selected items (for the single
 235     // selection listboxes only the first element of it is used and contains
 236     // the current selection)
 237     wxArrayInt m_selections;
 238
 239     // and this one the client data (either void or wxClientData)
 240     wxArrayPtrVoid m_itemsClientData;
 241
 242     // the current item
 243     int m_current;
 244
 245 private:
 246     // the range of elements which must be updated: if m_updateCount is 0 no
 247     // update is needed, if it is -1 everything must be updated, otherwise
 248     // m_updateCount items starting from m_updateFrom have to be redrawn
 249     int m_updateFrom,
 250         m_updateCount;
 251
 252     // the height of one line in the listbox (all lines have the same height)
 253     wxCoord m_lineHeight;
 254
 255     // the maximal width of a listbox item and the item which has it
 256     wxCoord m_maxWidth;
 257     int m_maxWidthItem;
 258
 259     // the extents of horz and vert scrollbars
 260     int m_scrollRangeX,
 261         m_scrollRangeY;
 262
 263     // the number of items per page
 264     size_t m_itemsPerPage;
 265
 266     // if the number of items has changed we may need to show/hide the
 267     // scrollbar
 268     bool m_updateScrollbarX, m_updateScrollbarY,
 269          m_showScrollbarX, m_showScrollbarY;
 270
 271     // if the current item has changed, we might need to scroll if it went out
 272     // of the window
 273     bool m_currentChanged;
 274
 275     // the anchor from which the selection is extended for the listboxes with
 276     // wxLB_EXTENDED style - this is set to the last item which was selected
 277     // by not extending the selection but by choosing it directly
 278     int m_selAnchor;
 279
 280     DECLARE_EVENT_TABLE()
 281     DECLARE_DYNAMIC_CLASS(wxListBox)
 282 };
 283
 284 // ----------------------------------------------------------------------------
 285 // wxStdListboxInputHandler: handles mouse and kbd in a single or multi
 286 // selection listbox
 287 // ----------------------------------------------------------------------------
 288
 289 class WXDLLEXPORT wxStdListboxInputHandler : public wxStdInputHandler
 290 {
 291 public:
 292     // if pressing the mouse button in a multiselection listbox should toggle
 293     // the item under mouse immediately, then specify TRUE as the second
 294     // parameter (this is the standard behaviour, under GTK the item is toggled
 295     // only when the mouse is released in the multi selection listbox)
 296     wxStdListboxInputHandler(wxInputHandler *inphand,
 297                              bool toggleOnPressAlways = TRUE);
 298
 299     // base class methods
 300     virtual bool HandleKey(wxInputConsumer *consumer,
 301                            const wxKeyEvent& event,
 302                            bool pressed);
 303     virtual bool HandleMouse(wxInputConsumer *consumer,
 304                              const wxMouseEvent& event);
 305     virtual bool HandleMouseMove(wxInputConsumer *consumer,
 306                                  const wxMouseEvent& event);
 307
 308 protected:
 309     // return the item under mouse, 0 if the mouse is above the listbox or
 310     // GetCount() if it is below it
 311     int HitTest(const wxListBox *listbox, const wxMouseEvent& event);
 312
 313     // parts of HitTest(): first finds the pseudo (because not in range) index
 314     // of the item and the second one adjusts it if necessary - that is if the
 315     // third one returns FALSE
 316     int HitTestUnsafe(const wxListBox *listbox, const wxMouseEvent& event);
 317     int FixItemIndex(const wxListBox *listbox, int item);
 318     bool IsValidIndex(const wxListBox *listbox, int item);
 319
 320     // init m_btnCapture and m_actionMouse
 321     wxControlAction SetupCapture(wxListBox *lbox,
 322                                  const wxMouseEvent& event,
 323                                  int item);
 324
 325     wxRenderer *m_renderer;
 326
 327     // the button which initiated the mouse capture (currently 0 or 1)
 328     int m_btnCapture;
 329
 330     // the action to perform when the mouse moves while we capture it
 331     wxControlAction m_actionMouse;
 332
 333     // the ctor parameter toggleOnPressAlways (see comments near it)
 334     bool m_toggleOnPressAlways;
 335
 336     // do we track the mouse outside the window when it is captured?
 337     bool m_trackMouseOutside;
 338 };
 339
 340 #endif // _WX_UNIV_LISTBOX_H_