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 SciTech Software, Inc. (www.scitechsoft.com)
   9 // Licence:     wxWindows licence
  10 ///////////////////////////////////////////////////////////////////////////////
  11
  12 #ifndef _WX_UNIV_LISTBOX_H_
  13 #define _WX_UNIV_LISTBOX_H_
  14
  15 #ifdef __GNUG__
  16     #pragma implementation "univlistbox.h"
  17 #endif
  18
  19 #include "wx/scrolwin.h"    // for wxScrollHelper
  20
  21 // ----------------------------------------------------------------------------
  22 // the actions supported by this control
  23 // ----------------------------------------------------------------------------
  24
  25 // change the current item
  26 #define wxACTION_LISTBOX_SETFOCUS   _T("setfocus")  // select the item
  27 #define wxACTION_LISTBOX_MOVEDOWN   _T("down")      // select item below
  28 #define wxACTION_LISTBOX_MOVEUP     _T("up")        // select item above
  29 #define wxACTION_LISTBOX_PAGEDOWN   _T("pagedown")  // go page down
  30 #define wxACTION_LISTBOX_PAGEUP     _T("pageup")    // go page up
  31 #define wxACTION_LISTBOX_START      _T("start")     // go to first item
  32 #define wxACTION_LISTBOX_END        _T("end")       // go to last item
  33 #define wxACTION_LISTBOX_FIND       _T("find")      // find item by 1st letter
  34
  35 // do something with the current item
  36 #define wxACTION_LISTBOX_ACTIVATE   _T("activate")  // activate (choose)
  37 #define wxACTION_LISTBOX_TOGGLE     _T("toggle")    // togglee selected state
  38 #define wxACTION_LISTBOX_SELECT     _T("select")    // sel this, unsel others
  39 #define wxACTION_LISTBOX_SELECTADD  _T("selectadd") // add to selection
  40 #define wxACTION_LISTBOX_UNSELECT   _T("unselect")  // unselect
  41 #define wxACTION_LISTBOX_ANCHOR     _T("selanchor") // anchor selection
  42
  43 // do something with the selection globally (not for single selection ones)
  44 #define wxACTION_LISTBOX_SELECTALL   _T("selectall")   // select all items
  45 #define wxACTION_LISTBOX_UNSELECTALL _T("unselectall") // unselect all items
  46 #define wxACTION_LISTBOX_SELTOGGLE   _T("togglesel")   // invert the selection
  47 #define wxACTION_LISTBOX_EXTENDSEL   _T("extend")      // extend to item
  48
  49 // ----------------------------------------------------------------------------
  50 // wxListBox: a list of selectable items
  51 // ----------------------------------------------------------------------------
  52
  53 class wxListBox : public wxListBoxBase, public wxScrollHelper
  54 {
  55 public:
  56     // ctors and such
  57     wxListBox() { Init(); }
  58     wxListBox(wxWindow *parent,
  59               wxWindowID id,
  60               const wxPoint& pos = wxDefaultPosition,
  61               const wxSize& size = wxDefaultSize,
  62               int n = 0, const wxString choices[] = (const wxString *) NULL,
  63               long style = 0,
  64               const wxValidator& validator = wxDefaultValidator,
  65               const wxString& name = wxListBoxNameStr )
  66     {
  67         Init();
  68
  69         Create(parent, id, pos, size, n, choices, style, validator, name);
  70     }
  71
  72     virtual ~wxListBox();
  73
  74     bool Create(wxWindow *parent,
  75                 wxWindowID id,
  76                 const wxPoint& pos = wxDefaultPosition,
  77                 const wxSize& size = wxDefaultSize,
  78                 int n = 0, const wxString choices[] = (const wxString *) NULL,
  79                 long style = 0,
  80                 const wxValidator& validator = wxDefaultValidator,
  81                 const wxString& name = wxListBoxNameStr);
  82
  83     // implement the listbox interface defined by wxListBoxBase
  84     virtual void Clear();
  85     virtual void Delete(int n);
  86
  87     virtual int GetCount() const { return (int)m_strings.GetCount(); }
  88     virtual wxString GetString(int n) const { return m_strings[n]; }
  89     virtual void SetString(int n, const wxString& s);
  90     virtual int FindString(const wxString& s) const
  91         { return m_strings.Index(s); }
  92
  93     virtual bool IsSelected(int n) const
  94         { return m_selections.Index(n) != wxNOT_FOUND; }
  95     virtual void SetSelection(int n, bool select = TRUE);
  96     virtual int GetSelection() const;
  97     virtual int GetSelections(wxArrayInt& aSelections) const;
  98
  99 protected:
 100     virtual int DoAppend(const wxString& item);
 101     virtual void DoInsertItems(const wxArrayString& items, int pos);
 102     virtual void DoSetItems(const wxArrayString& items, void **clientData);
 103
 104     virtual void DoSetFirstItem(int n);
 105
 106     virtual void DoSetItemClientData(int n, void* clientData);
 107     virtual void* DoGetItemClientData(int n) const;
 108     virtual void DoSetItemClientObject(int n, wxClientData* clientData);
 109     virtual wxClientData* DoGetItemClientObject(int n) const;
 110
 111 public:
 112     // override some more base class methods
 113     virtual bool SetFont(const wxFont& font);
 114
 115     // the wxUniversal-specific methods
 116     // --------------------------------
 117
 118     // the current item is the same as the selected one for wxLB_SINGLE
 119     // listboxes but for the other ones it is just the focused item which may
 120     // be selected or not
 121     int GetCurrentItem() const { return m_current; }
 122     void SetCurrentItem(int n);
 123
 124     // select the item which is diff items below the current one
 125     void ChangeCurrent(int diff);
 126
 127     // activate (i.e. send a LISTBOX_DOUBLECLICKED message) the specified or
 128     // current (if -1) item
 129     void Activate(int item = -1);
 130
 131     // select or unselect the specified or current (if -1) item
 132     void Select(bool sel = TRUE, int item = -1);
 133
 134     // more readable wrapper
 135     void Unselect(int item) { Select(FALSE, item); }
 136
 137     // select an item and send a notification about it
 138     void SelectAndNotify(int item);
 139
 140     // ensure that the given item is visible by scrolling it into view
 141     virtual void EnsureVisible(int n);
 142
 143     // find the first item [strictly] after the current one which starts with
 144     // the given string and make it the current one, return TRUE if the current
 145     // item changed
 146     bool FindItem(const wxString& prefix, bool strictlyAfter = FALSE);
 147     bool FindNextItem(const wxString& prefix) { return FindItem(prefix, TRUE); }
 148
 149     // extend the selection to span the range from the anchor (see below) to
 150     // the specified or current item
 151     void ExtendSelection(int itemTo = -1);
 152
 153     // make this item the new selection anchor: extending selection with
 154     // ExtendSelection() will work with it
 155     void AnchorSelection(int itemFrom) { m_selAnchor = itemFrom; }
 156
 157     // get, calculating it if necessary, the number of items per page, the
 158     // height of each line and the max width of an item
 159     int GetItemsPerPage() const;
 160     wxCoord GetLineHeight() const;
 161     wxCoord GetMaxWidth() const;
 162
 163     // override the wxControl virtual methods
 164     virtual bool PerformAction(const wxControlAction& action,
 165                                long numArg = 0l,
 166                                const wxString& strArg = wxEmptyString);
 167
 168     // let wxColourScheme choose the right colours for us
 169     virtual bool IsContainerWindow() const { return TRUE; }
 170
 171 protected:
 172     // geometry
 173     virtual wxSize DoGetBestClientSize() const;
 174     virtual void DoSetSize(int x, int y,
 175                            int width, int height,
 176                            int sizeFlags = wxSIZE_AUTO);
 177
 178     virtual void DoDraw(wxControlRenderer *renderer);
 179     virtual wxBorder GetDefaultBorder() const;
 180
 181     // common part of all ctors
 182     void Init();
 183
 184     // event handlers
 185     void OnIdle(wxIdleEvent& event);
 186     void OnSize(wxSizeEvent& event);
 187
 188     // common part of Clear() and DoSetItems(): clears everything
 189     virtual void DoClear();
 190
 191     // refresh the given item(s) or everything
 192     void RefreshItems(int from, int count);
 193     void RefreshItem(int n);
 194     void RefreshFromItemToEnd(int n);
 195     void RefreshAll();
 196
 197     // send an event of the given type (using m_current by default)
 198     bool SendEvent(wxEventType type, int item = -1);
 199
 200     // calculate the number of items per page using our current size
 201     void CalcItemsPerPage();
 202
 203     // can/should we have a horz scrollbar?
 204     bool HasHorzScrollbar() const
 205         { return (m_windowStyle & wxLB_HSCROLL) != 0; }
 206
 207     // redraw the items in the given range only: called from DoDraw()
 208     virtual void DoDrawRange(wxControlRenderer *renderer,
 209                              int itemFirst, int itemLast);
 210
 211     // update the scrollbars and then ensure that the item is visible
 212     void DoEnsureVisible(int n);
 213
 214     // mark horz scrollbar for updating
 215     void RefreshHorzScrollbar();
 216
 217     // update (show/hide/adjust) the scrollbars
 218     void UpdateScrollbars();
 219
 220     // refresh the items specified by m_updateCount and m_updateFrom
 221     void UpdateItems();
 222
 223     // the array containing all items (it is sorted if the listbox has
 224     // wxLB_SORT style)
 225     wxArrayString m_strings;
 226
 227     // this array contains the indices of the selected items (for the single
 228     // selection listboxes only the first element of it is used and contains
 229     // the current selection)
 230     wxArrayInt m_selections;
 231
 232     // and this one the client data (either void or wxClientData)
 233     wxArrayPtrVoid m_itemsClientData;
 234
 235     // the current item
 236     int m_current;
 237
 238 private:
 239     // the range of elements which must be updated: if m_updateCount is 0 no
 240     // update is needed, if it is -1 everything must be updated, otherwise
 241     // m_updateCount items starting from m_updateFrom have to be redrawn
 242     int m_updateFrom,
 243         m_updateCount;
 244
 245     // the height of one line in the listbox (all lines have the same height)
 246     wxCoord m_lineHeight;
 247
 248     // the maximal width of a listbox item and the item which has it
 249     wxCoord m_maxWidth;
 250     int m_maxWidthItem;
 251
 252     // the extents of horz and vert scrollbars
 253     int m_scrollRangeX,
 254         m_scrollRangeY;
 255
 256     // the number of items per page
 257     size_t m_itemsPerPage;
 258
 259     // if the number of items has changed we may need to show/hide the
 260     // scrollbar
 261     bool m_updateScrollbarX, m_updateScrollbarY,
 262          m_showScrollbarX, m_showScrollbarY;
 263
 264     // if the current item has changed, we might need to scroll if it went out
 265     // of the window
 266     bool m_currentChanged;
 267
 268     // the anchor from which the selection is extended for the listboxes with
 269     // wxLB_EXTENDED style - this is set to the last item which was selected
 270     // by not extending the selection but by choosing it directly
 271     int m_selAnchor;
 272
 273     DECLARE_EVENT_TABLE()
 274     DECLARE_DYNAMIC_CLASS(wxListBox)
 275 };
 276
 277 // ----------------------------------------------------------------------------
 278 // wxStdListboxInputHandler: handles mouse and kbd in a single or multi
 279 // selection listbox
 280 // ----------------------------------------------------------------------------
 281
 282 class WXDLLEXPORT wxStdListboxInputHandler : public wxStdInputHandler
 283 {
 284 public:
 285     // if pressing the mouse button in a multiselection listbox should toggle
 286     // the item under mouse immediately, then specify TRUE as the second
 287     // parameter (this is the standard behaviour, under GTK the item is toggled
 288     // only when the mouse is released in the multi selection listbox)
 289     wxStdListboxInputHandler(wxInputHandler *inphand,
 290                              bool toggleOnPressAlways = TRUE);
 291
 292     // base class methods
 293     virtual bool HandleKey(wxControl *control,
 294                            const wxKeyEvent& event,
 295                            bool pressed);
 296     virtual bool HandleMouse(wxControl *control,
 297                              const wxMouseEvent& event);
 298     virtual bool HandleMouseMove(wxControl *control,
 299                                  const wxMouseEvent& event);
 300
 301 protected:
 302     // return the item under mouse, 0 if the mouse is above the listbox or
 303     // GetCount() if it is below it
 304     int HitTest(const wxListBox *listbox, const wxMouseEvent& event);
 305
 306     // parts of HitTest(): first finds the pseudo (because not in range) index
 307     // of the item and the second one adjusts it if necessary - that is if the
 308     // third one returns FALSE
 309     int HitTestUnsafe(const wxListBox *listbox, const wxMouseEvent& event);
 310     int FixItemIndex(const wxListBox *listbox, int item);
 311     bool IsValidIndex(const wxListBox *listbox, int item);
 312
 313     // init m_btnCapture and m_actionMouse
 314     wxControlAction SetupCapture(wxListBox *lbox,
 315                                  const wxMouseEvent& event,
 316                                  int item);
 317
 318     wxRenderer *m_renderer;
 319
 320     // the button which initiated the mouse capture (currently 0 or 1)
 321     int m_btnCapture;
 322
 323     // the action to perform when the mouse moves while we capture it
 324     wxControlAction m_actionMouse;
 325
 326     // the ctor parameter toggleOnPressAlways (see comments near it)
 327     bool m_toggleOnPressAlways;
 328
 329     // do we track the mouse outside the window when it is captured?
 330     bool m_trackMouseOutside;
 331 };
 332
 333 #endif // _WX_UNIV_LISTBOX_H_