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       RECT rect ;
 148       rect.left   = 0 ;
 149       rect.top    = 0 ;
 150       rect.right  = nCheckWidth ;
 151       rect.bottom = nCheckHeight ;
 152
 153 #ifdef __WIN32__
 154 #ifndef __SC__
 155       DrawFrameControl(hdcMem, &rect, DFC_MENU, DFCS_MENUCHECK);
 156 #endif
 157 #else
 158       // In WIN16, draw a cross
 159       HPEN blackPen = CreatePen(PS_SOLID, 1, RGB(0, 0, 0));
 160       HPEN whiteBrush = (HPEN)GetStockObject(WHITE_BRUSH);
 161       HPEN hPenOld = (HPEN)::SelectObject(hdcMem, blackPen);
 162       HPEN hBrushOld = (HPEN)::SelectObject(hdcMem, whiteBrush);
 163       ::SetROP2(hdcMem, R2_COPYPEN);
 164       Rectangle(hdcMem, 0, 0, nCheckWidth, nCheckHeight);
 165       MoveTo(hdcMem, 0, 0);
 166       LineTo(hdcMem, nCheckWidth, nCheckHeight);
 167       MoveTo(hdcMem, nCheckWidth, 0);
 168       LineTo(hdcMem, 0, nCheckHeight);
 169       ::SelectObject(hdcMem, hPenOld);
 170       ::SelectObject(hdcMem, hBrushOld);
 171       ::DeleteObject(blackPen);
 172 #endif
 173
 174       // finally copy it to screen DC and clean up
 175       BitBlt(hdc, x, y, nCheckWidth - 1, nCheckHeight,
 176              hdcMem, 0, 0, SRCCOPY);
 177
 178       SelectObject(hdcMem, hbmpOld);
 179       DeleteObject(hbmpCheck);
 180       DeleteDC(hdcMem);
 181     }
 182
 183     // now we draw the smaller rectangle
 184     y++;
 185     nCheckWidth  -= 2;
 186     nCheckHeight -= 2;
 187
 188     // draw hollow gray rectangle
 189     (void)SelectObject(hdc, hpenGray);
 190     HBRUSH hbrPrev  = (HBRUSH)SelectObject(hdc, GetStockObject(NULL_BRUSH));
 191     Rectangle(hdc, x, y, x + nCheckWidth, y + nCheckHeight);
 192
 193     // clean up
 194     (void)SelectObject(hdc, hpenPrev);
 195     (void)SelectObject(hdc, hbrPrev);
 196
 197     DeleteObject(hpenBack);
 198     DeleteObject(hpenGray);
 199
 200     /*
 201     dc.DrawRectangle(x, y, nCheckWidth, nCheckHeight);
 202
 203     if ( IsChecked() ) {
 204       dc.DrawLine(x, y, x + nCheckWidth, y + nCheckHeight);
 205       dc.DrawLine(x, y + nCheckHeight, x + nCheckWidth, y);
 206     }
 207     */
 208
 209     return TRUE;
 210   }
 211
 212   return FALSE;
 213 }
 214
 215 // change the state of the item and redraw it
 216 void wxCheckListBoxItem::Check(bool check)
 217 {
 218     m_bChecked = check;
 219
 220     // index may be chanegd because new items were added/deleted
 221     if ( m_pParent->GetItemIndex(this) != (int)m_nIndex )
 222     {
 223         // update it
 224         int index = m_pParent->GetItemIndex(this);
 225
 226         wxASSERT_MSG( index != wxNOT_FOUND, wxT("what does this item do here?") );
 227
 228         m_nIndex = (size_t)index;
 229     }
 230
 231     HWND hwndListbox = (HWND)m_pParent->GetHWND();
 232
 233     #ifdef __WIN32__
 234         RECT rcUpdate;
 235
 236         if ( ::SendMessage(hwndListbox, LB_GETITEMRECT,
 237                            m_nIndex, (LPARAM)&rcUpdate) == LB_ERR )
 238         {
 239             wxLogDebug(wxT("LB_GETITEMRECT failed"));
 240         }
 241     #else // Win16
 242         // FIXME this doesn't work if the listbox is scrolled!
 243         size_t nHeight = m_pParent->GetItemHeight();
 244         size_t y = m_nIndex * nHeight;
 245         RECT rcUpdate ;
 246         rcUpdate.left   = 0 ;
 247         rcUpdate.top    = y ;
 248         rcUpdate.right  = GetDefaultMarginWidth() ;
 249         rcUpdate.bottom = y + nHeight ;
 250     #endif  // Win32/16
 251
 252     InvalidateRect(hwndListbox, &rcUpdate, FALSE);
 253
 254     wxCommandEvent event(wxEVT_COMMAND_CHECKLISTBOX_TOGGLED, m_pParent->GetId());
 255     event.SetInt(m_nIndex);
 256     event.SetEventObject(m_pParent);
 257     m_pParent->ProcessCommand(event);
 258 }
 259
 260 // ----------------------------------------------------------------------------
 261 // implementation of wxCheckListBox class
 262 // ----------------------------------------------------------------------------
 263
 264 // define event table
 265 // ------------------
 266 BEGIN_EVENT_TABLE(wxCheckListBox, wxListBox)
 267   EVT_CHAR(wxCheckListBox::OnChar)
 268   EVT_LEFT_DOWN(wxCheckListBox::OnLeftClick)
 269 END_EVENT_TABLE()
 270
 271 // control creation
 272 // ----------------
 273
 274 // def ctor: use Create() to really create the control
 275 wxCheckListBox::wxCheckListBox() : wxListBox()
 276 {
 277 }
 278
 279 // ctor which creates the associated control
 280 wxCheckListBox::wxCheckListBox(wxWindow *parent, wxWindowID id,
 281                                const wxPoint& pos, const wxSize& size,
 282                                int nStrings, const wxString choices[],
 283                                long style, const wxValidator& val,
 284                                const wxString& name)
 285               : wxListBox()
 286 {
 287     Create(parent, id, pos, size, nStrings, choices,
 288            style | wxLB_OWNERDRAW, val, name);
 289 }
 290
 291 void wxCheckListBox::Delete(int N)
 292 {
 293     wxCHECK_RET( N >= 0 && N < m_noItems,
 294                  wxT("invalid index in wxListBox::Delete") );
 295
 296     wxListBox::Delete(N);
 297
 298     // free memory
 299     delete m_aItems[N];
 300
 301     m_aItems.Remove(N);
 302 }
 303
 304 void wxCheckListBox::InsertItems(int nItems, const wxString items[], int pos)
 305 {
 306     wxCHECK_RET( pos >= 0 && pos <= m_noItems,
 307                  wxT("invalid index in wxCheckListBox::InsertItems") );
 308
 309     wxListBox::InsertItems(nItems, items, pos);
 310
 311     int i;
 312     for ( i = 0; i < nItems; i++ ) {
 313         wxOwnerDrawn *pNewItem = CreateItem((size_t)(pos + i));
 314         pNewItem->SetName(items[i]);
 315         pNewItem->SetFont(GetFont());
 316
 317         m_aItems.Insert(pNewItem, (size_t)(pos + i));
 318
 319         ListBox_SetItemData((HWND)GetHWND(), i + pos, pNewItem);
 320     }
 321 }
 322
 323
 324 bool wxCheckListBox::SetFont( const wxFont &font )
 325 {
 326     size_t i;
 327     for ( i = 0; i < m_aItems.GetCount(); i++ )
 328         m_aItems[i]->SetFont(font);
 329
 330     wxListBox::SetFont(font);
 331
 332     return TRUE;
 333 }
 334
 335 // create/retrieve item
 336 // --------------------
 337
 338 // create a check list box item
 339 wxOwnerDrawn *wxCheckListBox::CreateItem(size_t nIndex)
 340 {
 341   wxCheckListBoxItem *pItem = new wxCheckListBoxItem(this, nIndex);
 342   return pItem;
 343 }
 344
 345 // return item size
 346 // ----------------
 347 bool wxCheckListBox::MSWOnMeasure(WXMEASUREITEMSTRUCT *item)
 348 {
 349   if ( wxListBox::MSWOnMeasure(item) ) {
 350     MEASUREITEMSTRUCT *pStruct = (MEASUREITEMSTRUCT *)item;
 351
 352     // save item height
 353     m_nItemHeight = pStruct->itemHeight;
 354
 355     // add place for the check mark
 356     pStruct->itemWidth += wxOwnerDrawn::GetDefaultMarginWidth();
 357
 358     return TRUE;
 359   }
 360
 361   return FALSE;
 362 }
 363
 364 // check items
 365 // -----------
 366
 367 bool wxCheckListBox::IsChecked(size_t uiIndex) const
 368 {
 369   return GetItem(uiIndex)->IsChecked();
 370 }
 371
 372 void wxCheckListBox::Check(size_t uiIndex, bool bCheck)
 373 {
 374   GetItem(uiIndex)->Check(bCheck);
 375 }
 376
 377 // process events
 378 // --------------
 379
 380 void wxCheckListBox::OnChar(wxKeyEvent& event)
 381 {
 382   if ( event.KeyCode() == WXK_SPACE )
 383     GetItem(GetSelection())->Toggle();
 384   else
 385     event.Skip();
 386 }
 387
 388 void wxCheckListBox::OnLeftClick(wxMouseEvent& event)
 389 {
 390   // clicking on the item selects it, clicking on the checkmark toggles
 391   if ( event.GetX() <= wxOwnerDrawn::GetDefaultMarginWidth() ) {
 392     #ifdef __WIN32__
 393       size_t nItem = (size_t)::SendMessage
 394                                (
 395                                 (HWND)GetHWND(),
 396                                 LB_ITEMFROMPOINT,
 397                                 0,
 398                                 MAKELPARAM(event.GetX(), event.GetY())
 399                                );
 400     #else // Win16
 401         // FIXME this doesn't work when the listbox is scrolled!
 402         size_t nItem = ((size_t)event.GetY()) / m_nItemHeight;
 403     #endif // Win32/16
 404
 405     if ( nItem < (size_t)m_noItems )
 406       GetItem(nItem)->Toggle();
 407     //else: it's not an error, just click outside of client zone
 408   }
 409   else {
 410     // implement default behaviour: clicking on the item selects it
 411     event.Skip();
 412   }
 413 }
 414
 415 #endif
 416