src/msw/checklst.cpp

   1 ///////////////////////////////////////////////////////////////////////////////
   2 // Name:        msw/checklst.cpp
   3 // Purpose:     implementation of wxCheckListBox class
   4 // Author:      Vadim Zeitlin
   5 // Modified by:
   6 // Created:     16.11.97
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) 1998 Vadim Zeitlin <zeitlin@dptmaths.ens-cachan.fr>
   9 // Licence:     wxWindows license
  10 ///////////////////////////////////////////////////////////////////////////////
  11
  12 // ============================================================================
  13 // declarations
  14 // ============================================================================
  15
  16 // ----------------------------------------------------------------------------
  17 // headers
  18 // ----------------------------------------------------------------------------
  19
  20 #ifdef __GNUG__
  21 #pragma implementation "checklst.h"
  22 #endif
  23
  24 // For compilers that support precompilation, includes "wx.h".
  25 #include "wx/wxprec.h"
  26
  27 #ifdef __BORLANDC__
  28 #pragma hdrstop
  29 #endif
  30
  31 #if wxUSE_OWNER_DRAWN
  32
  33 #include "wx/object.h"
  34 #include "wx/colour.h"
  35 #include "wx/font.h"
  36 #include "wx/bitmap.h"
  37 #include "wx/window.h"
  38 #include "wx/listbox.h"
  39 #include "wx/ownerdrw.h"
  40 #include "wx/settings.h"
  41 #include "wx/dcmemory.h"
  42 #include "wx/msw/checklst.h"
  43 #include "wx/log.h"
  44
  45 #include <windows.h>
  46 #include <windowsx.h>
  47
  48 #if defined(__GNUWIN32__) && !defined(wxUSE_NORLANDER_HEADERS)
  49 #include "wx/msw/gnuwin32/extra.h"
  50 #endif
  51
  52 // ----------------------------------------------------------------------------
  53 // private functions
  54 // ----------------------------------------------------------------------------
  55
  56 // get item (converted to right type)
  57 #define GetItem(n)    ((wxCheckListBoxItem *)(GetItem(n)))
  58
  59 // ============================================================================
  60 // implementation
  61 // ============================================================================
  62
  63 #if !USE_SHARED_LIBRARY
  64   IMPLEMENT_DYNAMIC_CLASS(wxCheckListBox, wxListBox)
  65 #endif
  66
  67 // ----------------------------------------------------------------------------
  68 // declaration and implementation of wxCheckListBoxItem class
  69 // ----------------------------------------------------------------------------
  70
  71 class wxCheckListBoxItem : public wxOwnerDrawn
  72 {
  73 friend class wxCheckListBox;
  74 public:
  75   // ctor
  76   wxCheckListBoxItem(wxCheckListBox *pParent, size_t nIndex);
  77
  78   // drawing functions
  79   virtual bool OnDrawItem(wxDC& dc, const wxRect& rc, wxODAction act, wxODStatus stat);
  80
  81   // simple accessors
  82   bool IsChecked() const  { return m_bChecked;        }
  83   void Check(bool bCheck);
  84   void Toggle() { Check(!IsChecked()); }
  85
  86 private:
  87   bool            m_bChecked;
  88   wxCheckListBox *m_pParent;
  89   size_t            m_nIndex;
  90 };
  91
  92 wxCheckListBoxItem::wxCheckListBoxItem(wxCheckListBox *pParent, size_t nIndex)
  93                   : wxOwnerDrawn("", TRUE)   // checkable
  94 {
  95   m_bChecked = FALSE;
  96   m_pParent  = pParent;
  97   m_nIndex   = nIndex;
  98
  99   // we don't initialize m_nCheckHeight/Width vars because it's
 100   // done in OnMeasure while they are used only in OnDraw and we
 101   // know that there will always be OnMeasure before OnDraw
 102
 103   // fix appearance
 104   SetMarginWidth(GetDefaultMarginWidth());
 105 }
 106
 107 /*
 108  * JACS - I've got the owner-draw stuff partially working with WIN16,
 109  * with a really horrible-looking cross for wxCheckListBox instead of a
 110  * check - could use a bitmap check-mark instead, defined in wx.rc.
 111  * Also there's a refresh problem whereby it doesn't always draw the
 112  * check until you click to the right of it, which is OK for WIN32.
 113  */
 114
 115 bool wxCheckListBoxItem::OnDrawItem(wxDC& dc, const wxRect& rc,
 116                                     wxODAction act, wxODStatus stat)
 117 {
 118   if ( IsChecked() )
 119     stat = (wxOwnerDrawn::wxODStatus)(stat | wxOwnerDrawn::wxODChecked);
 120
 121   if ( wxOwnerDrawn::OnDrawItem(dc, rc, act, stat) ) {
 122     // ## using native API for performance and precision
 123     size_t nCheckWidth  = GetDefaultMarginWidth(),
 124          nCheckHeight = m_pParent->GetItemHeight();
 125
 126     int x = rc.GetX(),
 127         y = rc.GetY();
 128
 129     HDC hdc = (HDC)dc.GetHDC();
 130
 131     // create pens
 132     HPEN hpenBack = CreatePen(PS_SOLID, 0, GetSysColor(COLOR_WINDOW)),
 133          hpenGray = CreatePen(PS_SOLID, 0, RGB(128, 128, 128)),
 134          hpenPrev = (HPEN)SelectObject(hdc, hpenBack);
 135
 136     // we erase the 1-pixel border
 137     Rectangle(hdc, x, y, x + nCheckWidth, y + nCheckHeight);
 138
 139     // shift check mark 1 pixel to the right (it looks better like this)
 140     x++;
 141
 142     if ( IsChecked() ) {
 143       // first create a monochrome bitmap in a memory DC
 144       HDC hdcMem = CreateCompatibleDC(hdc);
 145       HBITMAP hbmpCheck = CreateBitmap(nCheckWidth, nCheckHeight, 1, 1, 0);
 146       HBITMAP hbmpOld = (HBITMAP)SelectObject(hdcMem, hbmpCheck);
 147
 148       // then draw a check mark into it
 149       RECT rect ;
 150       rect.left   = 0 ;
 151       rect.top    = 0 ;
 152       rect.right  = nCheckWidth ;
 153       rect.bottom = nCheckHeight ;
 154
 155 #ifdef __WIN32__
 156 #ifndef __SC__
 157       DrawFrameControl(hdcMem, &rect, DFC_MENU, DFCS_MENUCHECK);
 158 #endif
 159 #else
 160       // In WIN16, draw a cross
 161       HPEN blackPen = CreatePen(PS_SOLID, 1, RGB(0, 0, 0));
 162       HPEN whiteBrush = (HPEN)GetStockObject(WHITE_BRUSH);
 163       HPEN hPenOld = (HPEN)::SelectObject(hdcMem, blackPen);
 164       HPEN hBrushOld = (HPEN)::SelectObject(hdcMem, whiteBrush);
 165       ::SetROP2(hdcMem, R2_COPYPEN);
 166       Rectangle(hdcMem, 0, 0, nCheckWidth, nCheckHeight);
 167       MoveTo(hdcMem, 0, 0);
 168       LineTo(hdcMem, nCheckWidth, nCheckHeight);
 169       MoveTo(hdcMem, nCheckWidth, 0);
 170       LineTo(hdcMem, 0, nCheckHeight);
 171       ::SelectObject(hdcMem, hPenOld);
 172       ::SelectObject(hdcMem, hBrushOld);
 173       ::DeleteObject(blackPen);
 174 #endif
 175
 176       // finally copy it to screen DC and clean up
 177       BitBlt(hdc, x, y, nCheckWidth - 1, nCheckHeight,
 178              hdcMem, 0, 0, SRCCOPY);
 179
 180       SelectObject(hdcMem, hbmpOld);
 181       DeleteObject(hbmpCheck);
 182       DeleteDC(hdcMem);
 183     }
 184
 185     // now we draw the smaller rectangle
 186     y++;
 187     nCheckWidth  -= 2;
 188     nCheckHeight -= 2;
 189
 190     // draw hollow gray rectangle
 191     (void)SelectObject(hdc, hpenGray);
 192     HBRUSH hbrPrev  = (HBRUSH)SelectObject(hdc, GetStockObject(NULL_BRUSH));
 193     Rectangle(hdc, x, y, x + nCheckWidth, y + nCheckHeight);
 194
 195     // clean up
 196     (void)SelectObject(hdc, hpenPrev);
 197     (void)SelectObject(hdc, hbrPrev);
 198
 199     DeleteObject(hpenBack);
 200     DeleteObject(hpenGray);
 201
 202     /*
 203     dc.DrawRectangle(x, y, nCheckWidth, nCheckHeight);
 204
 205     if ( IsChecked() ) {
 206       dc.DrawLine(x, y, x + nCheckWidth, y + nCheckHeight);
 207       dc.DrawLine(x, y + nCheckHeight, x + nCheckWidth, y);
 208     }
 209     */
 210
 211     return TRUE;
 212   }
 213
 214   return FALSE;
 215 }
 216
 217 // change the state of the item and redraw it
 218 void wxCheckListBoxItem::Check(bool check)
 219 {
 220     m_bChecked = check;
 221
 222     // index may be chanegd because new items were added/deleted
 223     if ( m_pParent->GetItemIndex(this) != (int)m_nIndex )
 224     {
 225         // update it
 226         int index = m_pParent->GetItemIndex(this);
 227
 228         wxASSERT_MSG( index != wxNOT_FOUND, T("what does this item do here?") );
 229
 230         m_nIndex = (size_t)index;
 231     }
 232
 233     HWND hwndListbox = (HWND)m_pParent->GetHWND();
 234
 235     #ifdef __WIN32__
 236         RECT rcUpdate;
 237
 238         if ( ::SendMessage(hwndListbox, LB_GETITEMRECT,
 239                            m_nIndex, (LPARAM)&rcUpdate) == LB_ERR )
 240         {
 241             wxLogDebug(T("LB_GETITEMRECT failed"));
 242         }
 243     #else // Win16
 244         // FIXME this doesn't work if the listbox is scrolled!
 245         size_t nHeight = m_pParent->GetItemHeight();
 246         size_t y = m_nIndex * nHeight;
 247         RECT rcUpdate ;
 248         rcUpdate.left   = 0 ;
 249         rcUpdate.top    = y ;
 250         rcUpdate.right  = GetDefaultMarginWidth() ;
 251         rcUpdate.bottom = y + nHeight ;
 252     #endif  // Win32/16
 253
 254     InvalidateRect(hwndListbox, &rcUpdate, FALSE);
 255
 256     wxCommandEvent event(wxEVT_COMMAND_CHECKLISTBOX_TOGGLED, m_pParent->GetId());
 257     event.SetInt(m_nIndex);
 258     event.SetEventObject(m_pParent);
 259     m_pParent->ProcessCommand(event);
 260 }
 261
 262 // ----------------------------------------------------------------------------
 263 // implementation of wxCheckListBox class
 264 // ----------------------------------------------------------------------------
 265
 266 // define event table
 267 // ------------------
 268 BEGIN_EVENT_TABLE(wxCheckListBox, wxListBox)
 269   EVT_CHAR(wxCheckListBox::OnChar)
 270   EVT_LEFT_DOWN(wxCheckListBox::OnLeftClick)
 271 END_EVENT_TABLE()
 272
 273 // control creation
 274 // ----------------
 275
 276 // def ctor: use Create() to really create the control
 277 wxCheckListBox::wxCheckListBox() : wxListBox()
 278 {
 279 }
 280
 281 // ctor which creates the associated control
 282 wxCheckListBox::wxCheckListBox(wxWindow *parent, wxWindowID id,
 283                                const wxPoint& pos, const wxSize& size,
 284                                int nStrings, const wxString choices[],
 285                                long style, const wxValidator& val,
 286                                const wxString& name)
 287               : wxListBox()
 288 {
 289     Create(parent, id, pos, size, nStrings, choices,
 290            style | wxLB_OWNERDRAW, val, name);
 291 }
 292
 293 void wxCheckListBox::Delete(int N)
 294 {
 295     wxCHECK_RET( N >= 0 && N < m_noItems,
 296                  T("invalid index in wxListBox::Delete") );
 297
 298     wxListBox::Delete(N);
 299
 300     // free memory
 301     delete m_aItems[N];
 302
 303     m_aItems.Remove(N);
 304 }
 305
 306 void wxCheckListBox::InsertItems(int nItems, const wxString items[], int pos)
 307 {
 308     wxCHECK_RET( pos >= 0 && pos <= m_noItems,
 309                  T("invalid index in wxCheckListBox::InsertItems") );
 310
 311     wxListBox::InsertItems(nItems, items, pos);
 312
 313     int i;
 314     for ( i = 0; i < nItems; i++ ) {
 315         wxOwnerDrawn *pNewItem = CreateItem((size_t)(pos + i));
 316         pNewItem->SetName(items[i]);
 317         m_aItems.Insert(pNewItem, (size_t)(pos + i));
 318         ListBox_SetItemData((HWND)GetHWND(), i + pos, pNewItem);
 319     }
 320 }
 321
 322
 323 bool wxCheckListBox::SetFont( const wxFont &font )
 324 {
 325     size_t i;
 326     for (i=0; i < m_aItems.GetCount(); i++)
 327         m_aItems[i]->SetFont(font);
 328     wxListBox::SetFont(font);
 329     return TRUE;
 330 }
 331
 332 // create/retrieve item
 333 // --------------------
 334
 335 // create a check list box item
 336 wxOwnerDrawn *wxCheckListBox::CreateItem(size_t nIndex)
 337 {
 338   wxCheckListBoxItem *pItem = new wxCheckListBoxItem(this, nIndex);
 339   return pItem;
 340 }
 341
 342 // return item size
 343 // ----------------
 344 bool wxCheckListBox::MSWOnMeasure(WXMEASUREITEMSTRUCT *item)
 345 {
 346   if ( wxListBox::MSWOnMeasure(item) ) {
 347     MEASUREITEMSTRUCT *pStruct = (MEASUREITEMSTRUCT *)item;
 348
 349     // save item height
 350     m_nItemHeight = pStruct->itemHeight;
 351
 352     // add place for the check mark
 353     pStruct->itemWidth += wxOwnerDrawn::GetDefaultMarginWidth();
 354
 355     return TRUE;
 356   }
 357
 358   return FALSE;
 359 }
 360
 361 // check items
 362 // -----------
 363
 364 bool wxCheckListBox::IsChecked(size_t uiIndex) const
 365 {
 366   return GetItem(uiIndex)->IsChecked();
 367 }
 368
 369 void wxCheckListBox::Check(size_t uiIndex, bool bCheck)
 370 {
 371   GetItem(uiIndex)->Check(bCheck);
 372 }
 373
 374 // process events
 375 // --------------
 376
 377 void wxCheckListBox::OnChar(wxKeyEvent& event)
 378 {
 379   if ( event.KeyCode() == WXK_SPACE )
 380     GetItem(GetSelection())->Toggle();
 381   else
 382     event.Skip();
 383 }
 384
 385 void wxCheckListBox::OnLeftClick(wxMouseEvent& event)
 386 {
 387   // clicking on the item selects it, clicking on the checkmark toggles
 388   if ( event.GetX() <= wxOwnerDrawn::GetDefaultMarginWidth() ) {
 389     #ifdef __WIN32__
 390       size_t nItem = (size_t)::SendMessage
 391                                (
 392                                 (HWND)GetHWND(),
 393                                 LB_ITEMFROMPOINT,
 394                                 0,
 395                                 MAKELPARAM(event.GetX(), event.GetY())
 396                                );
 397     #else // Win16
 398         // FIXME this doesn't work when the listbox is scrolled!
 399         size_t nItem = ((size_t)event.GetY()) / m_nItemHeight;
 400     #endif // Win32/16
 401
 402     if ( nItem < (size_t)m_noItems )
 403       GetItem(nItem)->Toggle();
 404     //else: it's not an error, just click outside of client zone
 405   }
 406   else {
 407     // implement default behaviour: clicking on the item selects it
 408     event.Skip();
 409   }
 410 }
 411
 412 #endif
 413