src/os2/checklst.cpp

   1 ///////////////////////////////////////////////////////////////////////////////
   2 // Name:        checklst.cpp
   3 // Purpose:     implementation of wxCheckListBox class
   4 // Author:      David Webster
   5 // Modified by:
   6 // Created:     10/13/99
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) David Webster
   9 // Licence:     wxWindows licence
  10 ///////////////////////////////////////////////////////////////////////////////
  11
  12 // ============================================================================
  13 // headers & declarations
  14 // ============================================================================
  15
  16 // For compilers that support precompilation, includes "wx.h".
  17 #include "wx/wxprec.h"
  18
  19 #if wxUSE_OWNER_DRAWN
  20
  21 #include "wx/object.h"
  22 #include "wx/colour.h"
  23 #include "wx/font.h"
  24 #include "wx/bitmap.h"
  25 #include "wx/window.h"
  26 #include "wx/listbox.h"
  27 #include "wx/ownerdrw.h"
  28 #include "wx/settings.h"
  29 #include "wx/dcmemory.h"
  30 #include "wx/os2/checklst.h"
  31 #include "wx/log.h"
  32
  33 #define INCL_PM
  34 #include <os2.h>
  35
  36 // ----------------------------------------------------------------------------
  37 // private functions
  38 // ----------------------------------------------------------------------------
  39
  40 // get item (converted to right type)
  41 #define GetItem(n)    ((wxCheckListBoxItem *)(GetItem(n)))
  42
  43 // ============================================================================
  44 // implementation
  45 // ============================================================================
  46
  47   IMPLEMENT_DYNAMIC_CLASS(wxCheckListBox, wxListBox)
  48
  49 // ----------------------------------------------------------------------------
  50 // declaration and implementation of wxCheckListBoxItem class
  51 // ----------------------------------------------------------------------------
  52
  53 class wxCheckListBoxItem : public wxOwnerDrawn
  54 {
  55 friend class wxCheckListBox;
  56 public:
  57   // ctor
  58   wxCheckListBoxItem(wxCheckListBox *pParent, size_t nIndex);
  59
  60   // drawing functions
  61   virtual bool OnDrawItem(wxDC& dc, const wxRect& rc, wxODAction act, wxODStatus stat);
  62
  63   // simple accessors
  64   bool IsChecked() const  { return m_bChecked;        }
  65   void Check(bool bCheck);
  66   void Toggle() { Check(!IsChecked()); }
  67
  68 private:
  69   bool            m_bChecked;
  70   wxCheckListBox *m_pParent;
  71   size_t            m_nIndex;
  72 };
  73
  74 wxCheckListBoxItem::wxCheckListBoxItem(wxCheckListBox *pParent, size_t nIndex)
  75                   : wxOwnerDrawn("", TRUE)   // checkable
  76 {
  77   m_bChecked = FALSE;
  78   m_pParent  = pParent;
  79   m_nIndex   = nIndex;
  80
  81   // we don't initialize m_nCheckHeight/Width vars because it's
  82   // done in OnMeasure while they are used only in OnDraw and we
  83   // know that there will always be OnMeasure before OnDraw
  84
  85   // fix appearance
  86   SetMarginWidth(GetDefaultMarginWidth());
  87 }
  88
  89 /*
  90  * JACS - I've got the owner-draw stuff partially working with WIN16,
  91  * with a really horrible-looking cross for wxCheckListBox instead of a
  92  * check - could use a bitmap check-mark instead, defined in wx.rc.
  93  * Also there's a refresh problem whereby it doesn't always draw the
  94  * check until you click to the right of it, which is OK for WIN32.
  95  */
  96
  97 bool wxCheckListBoxItem::OnDrawItem(wxDC& dc, const wxRect& rc,
  98                                     wxODAction act, wxODStatus stat)
  99 {
 100   if ( IsChecked() )
 101     stat = (wxOwnerDrawn::wxODStatus)(stat | wxOwnerDrawn::wxODChecked);
 102
 103 // TODO:
 104 /*
 105
 106   if ( wxOwnerDrawn::OnDrawItem(dc, rc, act, stat) ) {
 107     // ## using native API for performance and precision
 108     size_t nCheckWidth  = GetDefaultMarginWidth(),
 109          nCheckHeight = m_pParent->GetItemHeight();
 110
 111     int x = rc.GetX(),
 112         y = rc.GetY();
 113
 114     HDC hdc = (HDC)dc.GetHDC();
 115
 116     // create pens
 117     HPEN hpenBack = CreatePen(PS_SOLID, 0, GetSysColor(COLOR_WINDOW)),
 118          hpenGray = CreatePen(PS_SOLID, 0, RGB(128, 128, 128)),
 119          hpenPrev = (HPEN)SelectObject(hdc, hpenBack);
 120
 121     // we erase the 1-pixel border
 122     Rectangle(hdc, x, y, x + nCheckWidth, y + nCheckHeight);
 123
 124     // shift check mark 1 pixel to the right (it looks better like this)
 125     x++;
 126
 127     if ( IsChecked() ) {
 128       // first create a monochrome bitmap in a memory DC
 129       HDC hdcMem = CreateCompatibleDC(hdc);
 130       HBITMAP hbmpCheck = CreateBitmap(nCheckWidth, nCheckHeight, 1, 1, 0);
 131       HBITMAP hbmpOld = (HBITMAP)SelectObject(hdcMem, hbmpCheck);
 132
 133       // then draw a check mark into it
 134       RECT rect ;
 135       rect.left   = 0 ;
 136       rect.top    = 0 ;
 137       rect.right  = nCheckWidth ;
 138       rect.bottom = nCheckHeight ;
 139
 140 #ifdef __WIN32__
 141 #ifndef __SC__
 142       DrawFrameControl(hdcMem, &rect, DFC_MENU, DFCS_MENUCHECK);
 143 #endif
 144 #else
 145       // In WIN16, draw a cross
 146       HPEN blackPen = CreatePen(PS_SOLID, 1, RGB(0, 0, 0));
 147       HPEN whiteBrush = (HPEN)GetStockObject(WHITE_BRUSH);
 148       HPEN hPenOld = (HPEN)::SelectObject(hdcMem, blackPen);
 149       HPEN hBrushOld = (HPEN)::SelectObject(hdcMem, whiteBrush);
 150       ::SetROP2(hdcMem, R2_COPYPEN);
 151       Rectangle(hdcMem, 0, 0, nCheckWidth, nCheckHeight);
 152       MoveTo(hdcMem, 0, 0);
 153       LineTo(hdcMem, nCheckWidth, nCheckHeight);
 154       MoveTo(hdcMem, nCheckWidth, 0);
 155       LineTo(hdcMem, 0, nCheckHeight);
 156       ::SelectObject(hdcMem, hPenOld);
 157       ::SelectObject(hdcMem, hBrushOld);
 158       ::DeleteObject(blackPen);
 159 #endif
 160
 161       // finally copy it to screen DC and clean up
 162       BitBlt(hdc, x, y, nCheckWidth - 1, nCheckHeight,
 163              hdcMem, 0, 0, SRCCOPY);
 164
 165       SelectObject(hdcMem, hbmpOld);
 166       DeleteObject(hbmpCheck);
 167       DeleteDC(hdcMem);
 168     }
 169
 170     // now we draw the smaller rectangle
 171     y++;
 172     nCheckWidth  -= 2;
 173     nCheckHeight -= 2;
 174
 175     // draw hollow gray rectangle
 176     (void)SelectObject(hdc, hpenGray);
 177     HBRUSH hbrPrev  = (HBRUSH)SelectObject(hdc, GetStockObject(NULL_BRUSH));
 178     Rectangle(hdc, x, y, x + nCheckWidth, y + nCheckHeight);
 179
 180     // clean up
 181     (void)SelectObject(hdc, hpenPrev);
 182     (void)SelectObject(hdc, hbrPrev);
 183
 184     DeleteObject(hpenBack);
 185     DeleteObject(hpenGray);
 186
 187 //
 188 //    dc.DrawRectangle(x, y, nCheckWidth, nCheckHeight);
 189 //
 190 //    if ( IsChecked() ) {
 191 //      dc.DrawLine(x, y, x + nCheckWidth, y + nCheckHeight);
 192 //      dc.DrawLine(x, y + nCheckHeight, x + nCheckWidth, y);
 193 //    }
 194 //
 195
 196     return TRUE;
 197   }
 198 */
 199   return FALSE;
 200 }
 201
 202 // change the state of the item and redraw it
 203 void wxCheckListBoxItem::Check(bool check)
 204 {
 205     m_bChecked = check;
 206
 207     // index may be chanegd because new items were added/deleted
 208     if ( m_pParent->GetItemIndex(this) != (int)m_nIndex )
 209     {
 210         // update it
 211         int index = m_pParent->GetItemIndex(this);
 212
 213         wxASSERT_MSG( index != wxNOT_FOUND, wxT("what does this item do here?") );
 214
 215         m_nIndex = (size_t)index;
 216     }
 217
 218     HWND hwndListbox = (HWND)m_pParent->GetHWND();
 219
 220 // TODO:
 221 /*
 222     RECT rcUpdate;
 223     if ( ::SendMessage(hwndListbox, LB_GETITEMRECT,
 224                        m_nIndex, (LPARAM)&rcUpdate) == LB_ERR )
 225     {
 226         wxLogDebug(wxT("LB_GETITEMRECT failed"));
 227     }
 228
 229     InvalidateRect(hwndListbox, &rcUpdate, FALSE);
 230 */
 231     wxCommandEvent event(wxEVT_COMMAND_CHECKLISTBOX_TOGGLED, m_pParent->GetId());
 232     event.SetInt(m_nIndex);
 233     event.SetEventObject(m_pParent);
 234     m_pParent->ProcessCommand(event);
 235 }
 236
 237 // ----------------------------------------------------------------------------
 238 // implementation of wxCheckListBox class
 239 // ----------------------------------------------------------------------------
 240
 241 // define event table
 242 // ------------------
 243 BEGIN_EVENT_TABLE(wxCheckListBox, wxListBox)
 244   EVT_CHAR(wxCheckListBox::OnChar)
 245   EVT_LEFT_DOWN(wxCheckListBox::OnLeftClick)
 246 END_EVENT_TABLE()
 247
 248 // control creation
 249 // ----------------
 250
 251 // def ctor: use Create() to really create the control
 252 wxCheckListBox::wxCheckListBox() : wxListBox()
 253 {
 254 }
 255
 256 // ctor which creates the associated control
 257 wxCheckListBox::wxCheckListBox(wxWindow *parent, wxWindowID id,
 258                                const wxPoint& pos, const wxSize& size,
 259                                int nStrings, const wxString choices[],
 260 #if wxUSE_VALIDATORS
 261                                long style, const wxValidator& val,
 262 #endif
 263                                const wxString& name)
 264               : wxListBox()
 265 {
 266     Create(parent, id, pos, size, nStrings, choices,
 267            style | wxLB_OWNERDRAW, val, name);
 268 }
 269
 270 void wxCheckListBox::Delete(int N)
 271 {
 272     wxCHECK_RET( N >= 0 && N < m_noItems,
 273                  wxT("invalid index in wxListBox::Delete") );
 274
 275     wxListBox::Delete(N);
 276
 277     // free memory
 278     delete m_aItems[N];
 279
 280     m_aItems.RemoveAt(N);
 281 }
 282
 283 void wxCheckListBox::InsertItems(int nItems, const wxString items[], int pos)
 284 {
 285     wxCHECK_RET( pos >= 0 && pos <= m_noItems,
 286                  wxT("invalid index in wxCheckListBox::InsertItems") );
 287
 288     wxListBox::InsertItems(nItems, items, pos);
 289
 290     int i;
 291     for ( i = 0; i < nItems; i++ ) {
 292         wxOwnerDrawn *pNewItem = CreateItem((size_t)(pos + i));
 293         pNewItem->SetName(items[i]);
 294         m_aItems.Insert(pNewItem, (size_t)(pos + i));
 295 //        ListBox_SetItemData((HWND)GetHWND(), i + pos, pNewItem);
 296     }
 297 }
 298
 299
 300 bool wxCheckListBox::SetFont( const wxFont &font )
 301 {
 302     size_t i;
 303     for (i=0; i < m_aItems.GetCount(); i++)
 304         m_aItems[i]->SetFont(font);
 305     wxListBox::SetFont(font);
 306     return TRUE;
 307 }
 308
 309 // create/retrieve item
 310 // --------------------
 311
 312 // create a check list box item
 313 wxOwnerDrawn *wxCheckListBox::CreateItem(size_t nIndex)
 314 {
 315   wxCheckListBoxItem *pItem = new wxCheckListBoxItem(this, nIndex);
 316   return pItem;
 317 }
 318
 319 // return item size
 320 // ----------------
 321 // TODO:
 322 /*
 323 bool wxCheckListBox::MSWOnMeasure(WXMEASUREITEMSTRUCT *item)
 324 {
 325   if ( wxListBox::MSWOnMeasure(item) ) {
 326     MEASUREITEMSTRUCT *pStruct = (MEASUREITEMSTRUCT *)item;
 327
 328     // save item height
 329     m_nItemHeight = pStruct->itemHeight;
 330
 331     // add place for the check mark
 332     pStruct->itemWidth += wxOwnerDrawn::GetDefaultMarginWidth();
 333
 334     return TRUE;
 335   }
 336
 337   return FALSE;
 338 }
 339 */
 340 // check items
 341 // -----------
 342
 343 bool wxCheckListBox::IsChecked(size_t uiIndex) const
 344 {
 345   return GetItem(uiIndex)->IsChecked();
 346 }
 347
 348 void wxCheckListBox::Check(size_t uiIndex, bool bCheck)
 349 {
 350   GetItem(uiIndex)->Check(bCheck);
 351 }
 352
 353 // process events
 354 // --------------
 355
 356 void wxCheckListBox::OnChar(wxKeyEvent& event)
 357 {
 358   if ( event.KeyCode() == WXK_SPACE )
 359     GetItem(GetSelection())->Toggle();
 360   else
 361     event.Skip();
 362 }
 363
 364 void wxCheckListBox::OnLeftClick(wxMouseEvent& event)
 365 {
 366   // clicking on the item selects it, clicking on the checkmark toggles
 367   if ( event.GetX() <= wxOwnerDrawn::GetDefaultMarginWidth() ) {
 368 // TODO:
 369 /*
 370       size_t nItem = (size_t)::SendMessage
 371                                (
 372                                 (HWND)GetHWND(),
 373                                 LB_ITEMFROMPOINT,
 374                                 0,
 375                                 MAKELPARAM(event.GetX(), event.GetY())
 376                                );
 377 */
 378     size_t nItem = 0;
 379
 380     if ( nItem < (size_t)m_noItems )
 381       GetItem(nItem)->Toggle();
 382     //else: it's not an error, just click outside of client zone
 383   }
 384   else {
 385     // implement default behaviour: clicking on the item selects it
 386     event.Skip();
 387   }
 388 }
 389
 390 #endif
 391