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