src/msw/combobox.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        combobox.cpp
   3 // Purpose:     wxComboBox class
   4 // Author:      Julian Smart
   5 // Modified by:
   6 // Created:     01/02/97
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) Julian Smart and Markus Holzem
   9 // Licence:     wxWindows licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 #ifdef __GNUG__
  13 #pragma implementation "combobox.h"
  14 #endif
  15
  16 // For compilers that support precompilation, includes "wx.h".
  17 #include "wx/wxprec.h"
  18
  19 #ifdef __BORLANDC__
  20 #pragma hdrstop
  21 #endif
  22
  23 #ifndef WX_PRECOMP
  24 #include "wx/setup.h"
  25 #endif
  26
  27 #if wxUSE_COMBOBOX
  28
  29 #include "wx/combobox.h"
  30 #include "wx/clipbrd.h"
  31 #include "wx/msw/private.h"
  32
  33 #if !USE_SHARED_LIBRARY
  34 IMPLEMENT_DYNAMIC_CLASS(wxComboBox, wxControl)
  35 #endif
  36
  37 bool wxComboBox::MSWCommand(WXUINT param, WXWORD WXUNUSED(id))
  38 {
  39   if (param == CBN_SELCHANGE)
  40   {
  41     if (GetSelection() > -1)
  42     {
  43         wxCommandEvent event(wxEVT_COMMAND_COMBOBOX_SELECTED, m_windowId);
  44         event.SetInt(GetSelection());
  45         event.SetEventObject(this);
  46         event.SetString(GetStringSelection());
  47         ProcessCommand(event);
  48     }
  49
  50     return TRUE;
  51   }
  52   else if (param == CBN_EDITCHANGE)
  53   {
  54     wxCommandEvent event(wxEVT_COMMAND_TEXT_UPDATED, m_windowId);
  55     event.SetString(GetValue());
  56     event.SetEventObject(this);
  57     ProcessCommand(event);
  58
  59     return TRUE;
  60   }
  61   else
  62       return FALSE;
  63 }
  64
  65 bool wxComboBox::Create(wxWindow *parent, wxWindowID id,
  66                         const wxString& value,
  67                         const wxPoint& pos,
  68                         const wxSize& size,
  69                         int n, const wxString choices[],
  70                         long style,
  71                         const wxValidator& validator,
  72                         const wxString& name)
  73 {
  74   SetName(name);
  75   SetValidator(validator);
  76   if (parent) parent->AddChild(this);
  77   SetBackgroundColour(parent->GetBackgroundColour()) ;
  78   SetForegroundColour(parent->GetForegroundColour()) ;
  79
  80   m_windowStyle = style;
  81
  82   if ( id == -1 )
  83     m_windowId = (int)NewControlId();
  84   else
  85     m_windowId = id;
  86
  87   int x = pos.x;
  88   int y = pos.y;
  89   int width = size.x;
  90   int height = size.y;
  91
  92   long msStyle = WS_CHILD | WS_TABSTOP | WS_VISIBLE | WS_HSCROLL | WS_VSCROLL |
  93       CBS_NOINTEGRALHEIGHT;
  94
  95   if (m_windowStyle & wxCB_READONLY)
  96     msStyle |= CBS_DROPDOWNLIST;
  97   else if (m_windowStyle & wxCB_SIMPLE)
  98     msStyle |= CBS_SIMPLE; // A list (shown always) and edit control
  99   else
 100     msStyle |= CBS_DROPDOWN;
 101
 102   if (m_windowStyle & wxCB_SORT)
 103     msStyle |= CBS_SORT;
 104
 105   bool want3D;
 106   WXDWORD exStyle = Determine3DEffects(WS_EX_CLIENTEDGE, &want3D) ;
 107
 108   // Even with extended styles, need to combine with WS_BORDER
 109   // for them to look right.
 110   if ( want3D || wxStyleHasBorder(m_windowStyle) )
 111     msStyle |= WS_BORDER;
 112
 113   m_hWnd = (WXHWND)::CreateWindowEx(exStyle, wxT("COMBOBOX"), NULL,
 114                    msStyle,
 115                    0, 0, 0, 0, (HWND) parent->GetHWND(), (HMENU)m_windowId,
 116                    wxGetInstance(), NULL);
 117
 118   wxCHECK_MSG( m_hWnd, FALSE, wxT("Failed to create combobox") );
 119
 120 /*
 121 #if wxUSE_CTL3D
 122   if (want3D)
 123   {
 124     Ctl3dSubclassCtl(wx_combo);
 125     m_useCtl3D = TRUE;
 126   }
 127 #endif
 128 */
 129
 130   // Subclass again for purposes of dialog editing mode
 131   SubclassWin(m_hWnd);
 132
 133   SetFont(parent->GetFont());
 134   int i;
 135   for (i = 0; i < n; i++)
 136   {
 137     Append(choices[i]);
 138   }
 139
 140   SetSelection(i);
 141
 142   SetSize(x, y, width, height);
 143   if ( !value.IsEmpty() )
 144   {
 145     SetValue(value);
 146   }
 147
 148   return TRUE;
 149 }
 150
 151 void wxComboBox::SetValue(const wxString& value)
 152 {
 153   // If newlines are denoted by just 10, must stick 13 in front.
 154   int singletons = 0;
 155   int len = value.Length();
 156   int i;
 157   for (i = 0; i < len; i ++)
 158   {
 159     if ((i > 0) && (value[i] == 10) && (value[i-1] != 13))
 160       singletons ++;
 161   }
 162   if (singletons > 0)
 163   {
 164     wxChar *tmp = new wxChar[len + singletons + 1];
 165     int j = 0;
 166     for (i = 0; i < len; i ++)
 167     {
 168       if ((i > 0) && (value[i] == 10) && (value[i-1] != 13))
 169       {
 170         tmp[j] = 13;
 171         j ++;
 172       }
 173       tmp[j] = value[i];
 174       j ++;
 175     }
 176     tmp[j] = 0;
 177     SetWindowText(GetHwnd(), tmp);
 178     delete[] tmp;
 179   }
 180   else
 181     SetWindowText(GetHwnd(), value);
 182 }
 183
 184 // Clipboard operations
 185 void wxComboBox::Copy()
 186 {
 187   HWND hWnd = GetHwnd();
 188   SendMessage(hWnd, WM_COPY, 0, 0L);
 189 }
 190
 191 void wxComboBox::Cut()
 192 {
 193   HWND hWnd = GetHwnd();
 194   SendMessage(hWnd, WM_CUT, 0, 0L);
 195 }
 196
 197 void wxComboBox::Paste()
 198 {
 199   HWND hWnd = GetHwnd();
 200   SendMessage(hWnd, WM_PASTE, 0, 0L);
 201 }
 202
 203 void wxComboBox::SetEditable(bool editable)
 204 {
 205   // Can't implement in MSW?
 206 //  HWND hWnd = GetHwnd();
 207 //  SendMessage(hWnd, EM_SETREADONLY, (WPARAM)!editable, (LPARAM)0L);
 208 }
 209
 210 void wxComboBox::SetInsertionPoint(long pos)
 211 {
 212 /*
 213   HWND hWnd = GetHwnd();
 214 #ifdef __WIN32__
 215   SendMessage(hWnd, EM_SETSEL, pos, pos);
 216   SendMessage(hWnd, EM_SCROLLCARET, (WPARAM)0, (LPARAM)0);
 217 #else
 218   SendMessage(hWnd, EM_SETSEL, 0, MAKELPARAM(pos, pos));
 219 #endif
 220   char *nothing = "";
 221   SendMessage(hWnd, EM_REPLACESEL, 0, (LPARAM)nothing);
 222 */
 223 }
 224
 225 void wxComboBox::SetInsertionPointEnd()
 226 {
 227 /*
 228   long pos = GetLastPosition();
 229   SetInsertionPoint(pos);
 230 */
 231 }
 232
 233 long wxComboBox::GetInsertionPoint() const
 234 {
 235 /*
 236   DWORD Pos=(DWORD)SendMessage(GetHwnd(), EM_GETSEL, 0, 0L);
 237   return Pos&0xFFFF;
 238 */
 239   return 0;
 240 }
 241
 242 long wxComboBox::GetLastPosition() const
 243 {
 244 /*
 245     HWND hWnd = GetHwnd();
 246
 247     // Will always return a number > 0 (according to docs)
 248     int noLines = (int)SendMessage(hWnd, EM_GETLINECOUNT, (WPARAM)0, (LPARAM)0L);
 249
 250     // This gets the char index for the _beginning_ of the last line
 251     int charIndex = (int)SendMessage(hWnd, EM_LINEINDEX, (WPARAM)(noLines-1), (LPARAM)0L);
 252
 253     // Get number of characters in the last line. We'll add this to the character
 254     // index for the last line, 1st position.
 255     int lineLength = (int)SendMessage(hWnd, EM_LINELENGTH, (WPARAM)charIndex, (LPARAM)0L);
 256
 257     return (long)(charIndex + lineLength);
 258 */
 259   return 0;
 260 }
 261
 262 void wxComboBox::Replace(long from, long to, const wxString& value)
 263 {
 264 #if wxUSE_CLIPBOARD
 265     HWND hWnd = GetHwnd();
 266     long fromChar = from;
 267     long toChar = to;
 268
 269     // Set selection and remove it
 270 #ifdef __WIN32__
 271     SendMessage(hWnd, CB_SETEDITSEL, fromChar, toChar);
 272 #else
 273     SendMessage(hWnd, CB_SETEDITSEL, (WPARAM)0, (LPARAM)MAKELONG(fromChar, toChar));
 274 #endif
 275     SendMessage(hWnd, WM_CUT, (WPARAM)0, (LPARAM)0);
 276
 277     // Now replace with 'value', by pasting.
 278     wxSetClipboardData(wxDF_TEXT, (wxObject *)(const wxChar *)value, 0, 0);
 279
 280     // Paste into edit control
 281     SendMessage(hWnd, WM_PASTE, (WPARAM)0, (LPARAM)0L);
 282 #endif
 283 }
 284
 285 void wxComboBox::Remove(long from, long to)
 286 {
 287     HWND hWnd = GetHwnd();
 288     long fromChar = from;
 289     long toChar = to;
 290
 291     // Cut all selected text
 292 #ifdef __WIN32__
 293     SendMessage(hWnd, CB_SETEDITSEL, fromChar, toChar);
 294 #else
 295     SendMessage(hWnd, CB_SETEDITSEL, (WPARAM)0, (LPARAM)MAKELONG(fromChar, toChar));
 296 #endif
 297     SendMessage(hWnd, WM_CUT, (WPARAM)0, (LPARAM)0);
 298 }
 299
 300 void wxComboBox::SetSelection(long from, long to)
 301 {
 302     HWND hWnd = GetHwnd();
 303     long fromChar = from;
 304     long toChar = to;
 305     // if from and to are both -1, it means
 306     // (in wxWindows) that all text should be selected.
 307     // This translates into Windows convention
 308     if ((from == -1) && (to == -1))
 309     {
 310       fromChar = 0;
 311       toChar = -1;
 312     }
 313
 314 #ifdef __WIN32__
 315     SendMessage(hWnd, CB_SETEDITSEL, (WPARAM)fromChar, (LPARAM)toChar);
 316 //    SendMessage(hWnd, EM_SCROLLCARET, (WPARAM)0, (LPARAM)0);
 317 #else
 318     // WPARAM is 0: selection is scrolled into view
 319     SendMessage(hWnd, CB_SETEDITSEL, (WPARAM)0, (LPARAM)MAKELONG(fromChar, toChar));
 320 #endif
 321 }
 322
 323 void wxComboBox::DoSetSize(int x, int y,
 324                            int width, int height,
 325                            int sizeFlags)
 326 {
 327     wxControl::DoSetSize(x, y, width, height, sizeFlags);
 328 }
 329
 330 #endif
 331  // wxUSE_COMBOBOX
 332