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