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 #ifdef __GNUWIN32_OLD__
  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   IMPLEMENT_DYNAMIC_CLASS(wxCheckListBox, wxListBox)
  64
  65 // ----------------------------------------------------------------------------
  66 // declaration and implementation of wxCheckListBoxItem class
  67 // ----------------------------------------------------------------------------
  68
  69 class wxCheckListBoxItem : public wxOwnerDrawn
  70 {
  71 friend class wxCheckListBox;
  72 public:
  73   // ctor
  74   wxCheckListBoxItem(wxCheckListBox *pParent, size_t nIndex);
  75
  76   // drawing functions
  77   virtual bool OnDrawItem(wxDC& dc, const wxRect& rc, wxODAction act, wxODStatus stat);
  78
  79   // simple accessors
  80   bool IsChecked() const  { return m_bChecked;        }
  81   void Check(bool bCheck);
  82   void Toggle() { Check(!IsChecked()); }
  83
  84 private:
  85   bool            m_bChecked;
  86   wxCheckListBox *m_pParent;
  87   size_t            m_nIndex;
  88 };
  89
  90 wxCheckListBoxItem::wxCheckListBoxItem(wxCheckListBox *pParent, size_t nIndex)
  91                   : wxOwnerDrawn("", TRUE)   // checkable
  92 {
  93   m_bChecked = FALSE;
  94   m_pParent  = pParent;
  95   m_nIndex   = nIndex;
  96
  97   // we don't initialize m_nCheckHeight/Width vars because it's
  98   // done in OnMeasure while they are used only in OnDraw and we
  99   // know that there will always be OnMeasure before OnDraw
 100
 101   // fix appearance
 102   SetMarginWidth(GetDefaultMarginWidth());
 103 }
 104
 105 /*
 106  * JACS - I've got the owner-draw stuff partially working with WIN16,
 107  * with a really horrible-looking cross for wxCheckListBox instead of a
 108  * check - could use a bitmap check-mark instead, defined in wx.rc.
 109  * Also there's a refresh problem whereby it doesn't always draw the
 110  * check until you click to the right of it, which is OK for WIN32.
 111  */
 112
 113 bool wxCheckListBoxItem::OnDrawItem(wxDC& dc, const wxRect& rc,
 114                                     wxODAction act, wxODStatus stat)
 115 {
 116   if ( IsChecked() )
 117     stat = (wxOwnerDrawn::wxODStatus)(stat | wxOwnerDrawn::wxODChecked);
 118
 119   if ( wxOwnerDrawn::OnDrawItem(dc, rc, act, stat) ) {
 120     // ## using native API for performance and precision
 121     size_t nCheckWidth  = GetDefaultMarginWidth(),
 122          nCheckHeight = m_pParent->GetItemHeight();
 123
 124     int x = rc.GetX(),
 125         y = rc.GetY();
 126
 127     HDC hdc = (HDC)dc.GetHDC();
 128
 129     // create pens
 130     HPEN hpenBack = CreatePen(PS_SOLID, 0, GetSysColor(COLOR_WINDOW)),
 131          hpenGray = CreatePen(PS_SOLID, 0, RGB(128, 128, 128)),
 132          hpenPrev = (HPEN)SelectObject(hdc, hpenBack);
 133
 134     // we erase the 1-pixel border
 135     Rectangle(hdc, x, y, x + nCheckWidth, y + nCheckHeight);
 136
 137     // shift check mark 1 pixel to the right (it looks better like this)
 138     x++;
 139
 140     if ( IsChecked() ) {
 141       // first create a monochrome bitmap in a memory DC
 142       HDC hdcMem = CreateCompatibleDC(hdc);
 143       HBITMAP hbmpCheck = CreateBitmap(nCheckWidth, nCheckHeight, 1, 1, 0);
 144       HBITMAP hbmpOld = (HBITMAP)SelectObject(hdcMem, hbmpCheck);
 145
 146       // then draw a check mark into it
 147 #if defined(__WIN32__) && !defined(__SC__)
 148       RECT rect;
 149       rect.left   = 0;
 150       rect.top    = 0;
 151       rect.right  = nCheckWidth;
 152       rect.bottom = nCheckHeight;
 153
 154       DrawFrameControl(hdcMem, &rect, DFC_MENU, DFCS_MENUCHECK);
 155 #else
 156       // In WIN16, draw a cross
 157       HPEN blackPen = CreatePen(PS_SOLID, 1, RGB(0, 0, 0));
 158       HPEN whiteBrush = (HPEN)GetStockObject(WHITE_BRUSH);
 159       HPEN hPenOld = (HPEN)::SelectObject(hdcMem, blackPen);
 160       HPEN hBrushOld = (HPEN)::SelectObject(hdcMem, whiteBrush);
 161       ::SetROP2(hdcMem, R2_COPYPEN);
 162       Rectangle(hdcMem, 0, 0, nCheckWidth, nCheckHeight);
 163       MoveTo(hdcMem, 0, 0);
 164       LineTo(hdcMem, nCheckWidth, nCheckHeight);
 165       MoveTo(hdcMem, nCheckWidth, 0);
 166       LineTo(hdcMem, 0, nCheckHeight);
 167       ::SelectObject(hdcMem, hPenOld);
 168       ::SelectObject(hdcMem, hBrushOld);
 169       ::DeleteObject(blackPen);
 170 #endif
 171
 172       // finally copy it to screen DC and clean up
 173       BitBlt(hdc, x, y, nCheckWidth - 1, nCheckHeight,
 174              hdcMem, 0, 0, SRCCOPY);
 175
 176       SelectObject(hdcMem, hbmpOld);
 177       DeleteObject(hbmpCheck);
 178       DeleteDC(hdcMem);
 179     }
 180
 181     // now we draw the smaller rectangle
 182     y++;
 183     nCheckWidth  -= 2;
 184     nCheckHeight -= 2;
 185
 186     // draw hollow gray rectangle
 187     (void)SelectObject(hdc, hpenGray);
 188     HBRUSH hbrPrev  = (HBRUSH)SelectObject(hdc, GetStockObject(NULL_BRUSH));
 189     Rectangle(hdc, x, y, x + nCheckWidth, y + nCheckHeight);
 190
 191     // clean up
 192     (void)SelectObject(hdc, hpenPrev);
 193     (void)SelectObject(hdc, hbrPrev);
 194
 195     DeleteObject(hpenBack);
 196     DeleteObject(hpenGray);
 197
 198     /*
 199     dc.DrawRectangle(x, y, nCheckWidth, nCheckHeight);
 200
 201     if ( IsChecked() ) {
 202       dc.DrawLine(x, y, x + nCheckWidth, y + nCheckHeight);
 203       dc.DrawLine(x, y + nCheckHeight, x + nCheckWidth, y);
 204     }
 205     */
 206
 207     return TRUE;
 208   }
 209
 210   return FALSE;
 211 }
 212
 213 // change the state of the item and redraw it
 214 void wxCheckListBoxItem::Check(bool check)
 215 {
 216     m_bChecked = check;
 217
 218     // index may be chanegd because new items were added/deleted
 219     if ( m_pParent->GetItemIndex(this) != (int)m_nIndex )
 220     {
 221         // update it
 222         int index = m_pParent->GetItemIndex(this);
 223
 224         wxASSERT_MSG( index != wxNOT_FOUND, wxT("what does this item do here?") );
 225
 226         m_nIndex = (size_t)index;
 227     }
 228
 229     HWND hwndListbox = (HWND)m_pParent->GetHWND();
 230
 231     #ifdef __WIN32__
 232         RECT rcUpdate;
 233
 234         if ( ::SendMessage(hwndListbox, LB_GETITEMRECT,
 235                            m_nIndex, (LPARAM)&rcUpdate) == LB_ERR )
 236         {
 237             wxLogDebug(wxT("LB_GETITEMRECT failed"));
 238         }
 239     #else // Win16
 240         // FIXME this doesn't work if the listbox is scrolled!
 241         size_t nHeight = m_pParent->GetItemHeight();
 242         size_t y = m_nIndex * nHeight;
 243         RECT rcUpdate ;
 244         rcUpdate.left   = 0 ;
 245         rcUpdate.top    = y ;
 246         rcUpdate.right  = GetDefaultMarginWidth() ;
 247         rcUpdate.bottom = y + nHeight ;
 248     #endif  // Win32/16
 249
 250     InvalidateRect(hwndListbox, &rcUpdate, FALSE);
 251
 252     wxCommandEvent event(wxEVT_COMMAND_CHECKLISTBOX_TOGGLED, m_pParent->GetId());
 253     event.SetInt(m_nIndex);
 254     event.SetEventObject(m_pParent);
 255     m_pParent->ProcessCommand(event);
 256 }
 257
 258 // ----------------------------------------------------------------------------
 259 // implementation of wxCheckListBox class
 260 // ----------------------------------------------------------------------------
 261
 262 // define event table
 263 // ------------------
 264 BEGIN_EVENT_TABLE(wxCheckListBox, wxListBox)
 265   EVT_CHAR(wxCheckListBox::OnChar)
 266   EVT_LEFT_DOWN(wxCheckListBox::OnLeftClick)
 267 END_EVENT_TABLE()
 268
 269 // control creation
 270 // ----------------
 271
 272 // def ctor: use Create() to really create the control
 273 wxCheckListBox::wxCheckListBox() : wxListBox()
 274 {
 275 }
 276
 277 // ctor which creates the associated control
 278 wxCheckListBox::wxCheckListBox(wxWindow *parent, wxWindowID id,
 279                                const wxPoint& pos, const wxSize& size,
 280                                int nStrings, const wxString choices[],
 281                                long style, const wxValidator& val,
 282                                const wxString& name)
 283               : wxListBox()
 284 {
 285     Create(parent, id, pos, size, nStrings, choices,
 286            style | wxLB_OWNERDRAW, val, name);
 287 }
 288
 289 void wxCheckListBox::Delete(int N)
 290 {
 291     wxCHECK_RET( N >= 0 && N < m_noItems,
 292                  wxT("invalid index in wxListBox::Delete") );
 293
 294     wxListBox::Delete(N);
 295
 296     // free memory
 297     delete m_aItems[N];
 298
 299     m_aItems.Remove(N);
 300 }
 301
 302 void wxCheckListBox::InsertItems(int nItems, const wxString items[], int pos)
 303 {
 304     wxCHECK_RET( pos >= 0 && pos <= m_noItems,
 305                  wxT("invalid index in wxCheckListBox::InsertItems") );
 306
 307     wxListBox::InsertItems(nItems, items, pos);
 308
 309     int i;
 310     for ( i = 0; i < nItems; i++ ) {
 311         wxOwnerDrawn *pNewItem = CreateItem((size_t)(pos + i));
 312         pNewItem->SetName(items[i]);
 313         pNewItem->SetFont(GetFont());
 314
 315         m_aItems.Insert(pNewItem, (size_t)(pos + i));
 316
 317         ListBox_SetItemData((HWND)GetHWND(), i + pos, pNewItem);
 318     }
 319 }
 320
 321
 322 bool wxCheckListBox::SetFont( const wxFont &font )
 323 {
 324     size_t i;
 325     for ( i = 0; i < m_aItems.GetCount(); i++ )
 326         m_aItems[i]->SetFont(font);
 327
 328     wxListBox::SetFont(font);
 329
 330     return TRUE;
 331 }
 332
 333 // create/retrieve item
 334 // --------------------
 335
 336 // create a check list box item
 337 wxOwnerDrawn *wxCheckListBox::CreateItem(size_t nIndex)
 338 {
 339   wxCheckListBoxItem *pItem = new wxCheckListBoxItem(this, nIndex);
 340   return pItem;
 341 }
 342
 343 // return item size
 344 // ----------------
 345 bool wxCheckListBox::MSWOnMeasure(WXMEASUREITEMSTRUCT *item)
 346 {
 347   if ( wxListBox::MSWOnMeasure(item) ) {
 348     MEASUREITEMSTRUCT *pStruct = (MEASUREITEMSTRUCT *)item;
 349
 350     // save item height
 351     m_nItemHeight = pStruct->itemHeight;
 352
 353     // add place for the check mark
 354     pStruct->itemWidth += wxOwnerDrawn::GetDefaultMarginWidth();
 355
 356     return TRUE;
 357   }
 358
 359   return FALSE;
 360 }
 361
 362 // check items
 363 // -----------
 364
 365 bool wxCheckListBox::IsChecked(size_t uiIndex) const
 366 {
 367   return GetItem(uiIndex)->IsChecked();
 368 }
 369
 370 void wxCheckListBox::Check(size_t uiIndex, bool bCheck)
 371 {
 372   GetItem(uiIndex)->Check(bCheck);
 373 }
 374
 375 // process events
 376 // --------------
 377
 378 void wxCheckListBox::OnChar(wxKeyEvent& event)
 379 {
 380   if ( event.KeyCode() == WXK_SPACE )
 381     GetItem(GetSelection())->Toggle();
 382   else
 383     event.Skip();
 384 }
 385
 386 void wxCheckListBox::OnLeftClick(wxMouseEvent& event)
 387 {
 388   // clicking on the item selects it, clicking on the checkmark toggles
 389   if ( event.GetX() <= wxOwnerDrawn::GetDefaultMarginWidth() ) {
 390     #ifdef __WIN32__
 391       size_t nItem = (size_t)::SendMessage
 392                                (
 393                                 (HWND)GetHWND(),
 394                                 LB_ITEMFROMPOINT,
 395                                 0,
 396                                 MAKELPARAM(event.GetX(), event.GetY())
 397                                );
 398     #else // Win16
 399         // FIXME this doesn't work when the listbox is scrolled!
 400         size_t nItem = ((size_t)event.GetY()) / m_nItemHeight;
 401     #endif // Win32/16
 402
 403     if ( nItem < (size_t)m_noItems )
 404       GetItem(nItem)->Toggle();
 405     //else: it's not an error, just click outside of client zone
 406   }
 407   else {
 408     // implement default behaviour: clicking on the item selects it
 409     event.Skip();
 410   }
 411 }
 412
 413 #endif
 414