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 #if wxUSE_COMBOBOX
  24
  25 #ifndef WX_PRECOMP
  26 #include "wx/settings.h"
  27 #endif
  28
  29 #include "wx/combobox.h"
  30 #include "wx/clipbrd.h"
  31 #include "wx/msw/private.h"
  32
  33 IMPLEMENT_DYNAMIC_CLASS(wxComboBox, wxControl)
  34
  35 bool wxComboBox::MSWCommand(WXUINT param, WXWORD WXUNUSED(id))
  36 {
  37     switch ( param )
  38     {
  39         case CBN_SELCHANGE:
  40             if (GetSelection() > -1)
  41             {
  42                 wxCommandEvent event(wxEVT_COMMAND_COMBOBOX_SELECTED, GetId());
  43                 event.SetInt(GetSelection());
  44                 event.SetEventObject(this);
  45                 event.SetString(GetStringSelection());
  46                 ProcessCommand(event);
  47             }
  48             break;
  49
  50         case CBN_EDITCHANGE:
  51             {
  52                 wxCommandEvent event(wxEVT_COMMAND_TEXT_UPDATED, GetId());
  53                 event.SetString(GetValue());
  54                 event.SetEventObject(this);
  55                 ProcessCommand(event);
  56             }
  57             break;
  58     }
  59
  60     // there is no return value for the CBN_ notifications, so always return
  61     // FALSE from here to pass the message to DefWindowProc()
  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
  79   // A choice/combobox normally has a white background (or other, depending
  80   // on global settings) rather than inheriting the parent's background colour.
  81   SetBackgroundColour(wxSystemSettings::GetSystemColour(wxSYS_COLOUR_WINDOW));
  82
  83   SetForegroundColour(parent->GetForegroundColour()) ;
  84
  85   m_windowStyle = style;
  86
  87   if ( id == -1 )
  88     m_windowId = (int)NewControlId();
  89   else
  90     m_windowId = id;
  91
  92   int x = pos.x;
  93   int y = pos.y;
  94   int width = size.x;
  95   int height = size.y;
  96
  97   long msStyle = WS_CHILD | WS_TABSTOP | WS_VISIBLE | WS_HSCROLL | WS_VSCROLL |
  98       CBS_NOINTEGRALHEIGHT;
  99
 100   if (m_windowStyle & wxCB_READONLY)
 101     msStyle |= CBS_DROPDOWNLIST;
 102   else if (m_windowStyle & wxCB_SIMPLE)
 103     msStyle |= CBS_SIMPLE; // A list (shown always) and edit control
 104   else
 105     msStyle |= CBS_DROPDOWN;
 106
 107   if (m_windowStyle & wxCB_SORT)
 108     msStyle |= CBS_SORT;
 109
 110   bool want3D;
 111   WXDWORD exStyle = Determine3DEffects(WS_EX_CLIENTEDGE, &want3D) ;
 112
 113   // Even with extended styles, need to combine with WS_BORDER
 114   // for them to look right.
 115   if ( want3D || wxStyleHasBorder(m_windowStyle) )
 116     msStyle |= WS_BORDER;
 117
 118   m_hWnd = (WXHWND)::CreateWindowEx(exStyle, wxT("COMBOBOX"), NULL,
 119                    msStyle,
 120                    0, 0, 0, 0, (HWND) parent->GetHWND(), (HMENU)m_windowId,
 121                    wxGetInstance(), NULL);
 122
 123   wxCHECK_MSG( m_hWnd, FALSE, wxT("Failed to create combobox") );
 124
 125 /*
 126 #if wxUSE_CTL3D
 127   if (want3D)
 128   {
 129     Ctl3dSubclassCtl(wx_combo);
 130     m_useCtl3D = TRUE;
 131   }
 132 #endif
 133 */
 134
 135   // Subclass again for purposes of dialog editing mode
 136   SubclassWin(m_hWnd);
 137
 138   SetFont(parent->GetFont());
 139   int i;
 140   for (i = 0; i < n; i++)
 141   {
 142     Append(choices[i]);
 143   }
 144
 145   SetSelection(i);
 146
 147   SetSize(x, y, width, height);
 148   if ( !value.IsEmpty() )
 149   {
 150     SetValue(value);
 151   }
 152
 153   return TRUE;
 154 }
 155
 156 void wxComboBox::SetValue(const wxString& value)
 157 {
 158   // If newlines are denoted by just 10, must stick 13 in front.
 159   int singletons = 0;
 160   int len = value.Length();
 161   int i;
 162   for (i = 0; i < len; i ++)
 163   {
 164     if ((i > 0) && (value[i] == 10) && (value[i-1] != 13))
 165       singletons ++;
 166   }
 167   if (singletons > 0)
 168   {
 169     wxChar *tmp = new wxChar[len + singletons + 1];
 170     int j = 0;
 171     for (i = 0; i < len; i ++)
 172     {
 173       if ((i > 0) && (value[i] == 10) && (value[i-1] != 13))
 174       {
 175         tmp[j] = 13;
 176         j ++;
 177       }
 178       tmp[j] = value[i];
 179       j ++;
 180     }
 181     tmp[j] = 0;
 182     SetWindowText(GetHwnd(), tmp);
 183     delete[] tmp;
 184   }
 185   else
 186     SetWindowText(GetHwnd(), value);
 187 }
 188
 189 // Clipboard operations
 190 void wxComboBox::Copy()
 191 {
 192   HWND hWnd = GetHwnd();
 193   SendMessage(hWnd, WM_COPY, 0, 0L);
 194 }
 195
 196 void wxComboBox::Cut()
 197 {
 198   HWND hWnd = GetHwnd();
 199   SendMessage(hWnd, WM_CUT, 0, 0L);
 200 }
 201
 202 void wxComboBox::Paste()
 203 {
 204   HWND hWnd = GetHwnd();
 205   SendMessage(hWnd, WM_PASTE, 0, 0L);
 206 }
 207
 208 void wxComboBox::SetEditable(bool editable)
 209 {
 210   // Can't implement in MSW?
 211 //  HWND hWnd = GetHwnd();
 212 //  SendMessage(hWnd, EM_SETREADONLY, (WPARAM)!editable, (LPARAM)0L);
 213 }
 214
 215 void wxComboBox::SetInsertionPoint(long pos)
 216 {
 217 /*
 218   HWND hWnd = GetHwnd();
 219 #ifdef __WIN32__
 220   SendMessage(hWnd, EM_SETSEL, pos, pos);
 221   SendMessage(hWnd, EM_SCROLLCARET, (WPARAM)0, (LPARAM)0);
 222 #else
 223   SendMessage(hWnd, EM_SETSEL, 0, MAKELPARAM(pos, pos));
 224 #endif
 225   char *nothing = "";
 226   SendMessage(hWnd, EM_REPLACESEL, 0, (LPARAM)nothing);
 227 */
 228 }
 229
 230 void wxComboBox::SetInsertionPointEnd()
 231 {
 232 /*
 233   long pos = GetLastPosition();
 234   SetInsertionPoint(pos);
 235 */
 236 }
 237
 238 long wxComboBox::GetInsertionPoint() const
 239 {
 240 /*
 241   DWORD Pos=(DWORD)SendMessage(GetHwnd(), EM_GETSEL, 0, 0L);
 242   return Pos&0xFFFF;
 243 */
 244   return 0;
 245 }
 246
 247 long wxComboBox::GetLastPosition() const
 248 {
 249 /*
 250     HWND hWnd = GetHwnd();
 251
 252     // Will always return a number > 0 (according to docs)
 253     int noLines = (int)SendMessage(hWnd, EM_GETLINECOUNT, (WPARAM)0, (LPARAM)0L);
 254
 255     // This gets the char index for the _beginning_ of the last line
 256     int charIndex = (int)SendMessage(hWnd, EM_LINEINDEX, (WPARAM)(noLines-1), (LPARAM)0L);
 257
 258     // Get number of characters in the last line. We'll add this to the character
 259     // index for the last line, 1st position.
 260     int lineLength = (int)SendMessage(hWnd, EM_LINELENGTH, (WPARAM)charIndex, (LPARAM)0L);
 261
 262     return (long)(charIndex + lineLength);
 263 */
 264   return 0;
 265 }
 266
 267 void wxComboBox::Replace(long from, long to, const wxString& value)
 268 {
 269 #if wxUSE_CLIPBOARD
 270     HWND hWnd = GetHwnd();
 271     long fromChar = from;
 272     long toChar = to;
 273
 274     // Set selection and remove it
 275 #ifdef __WIN32__
 276     SendMessage(hWnd, CB_SETEDITSEL, fromChar, toChar);
 277 #else
 278     SendMessage(hWnd, CB_SETEDITSEL, (WPARAM)0, (LPARAM)MAKELONG(fromChar, toChar));
 279 #endif
 280     SendMessage(hWnd, WM_CUT, (WPARAM)0, (LPARAM)0);
 281
 282     // Now replace with 'value', by pasting.
 283     wxSetClipboardData(wxDF_TEXT, (wxObject *)(const wxChar *)value, 0, 0);
 284
 285     // Paste into edit control
 286     SendMessage(hWnd, WM_PASTE, (WPARAM)0, (LPARAM)0L);
 287 #endif
 288 }
 289
 290 void wxComboBox::Remove(long from, long to)
 291 {
 292     HWND hWnd = GetHwnd();
 293     long fromChar = from;
 294     long toChar = to;
 295
 296     // Cut all selected text
 297 #ifdef __WIN32__
 298     SendMessage(hWnd, CB_SETEDITSEL, fromChar, toChar);
 299 #else
 300     SendMessage(hWnd, CB_SETEDITSEL, (WPARAM)0, (LPARAM)MAKELONG(fromChar, toChar));
 301 #endif
 302     SendMessage(hWnd, WM_CUT, (WPARAM)0, (LPARAM)0);
 303 }
 304
 305 void wxComboBox::SetSelection(long from, long to)
 306 {
 307     HWND hWnd = GetHwnd();
 308     long fromChar = from;
 309     long toChar = to;
 310     // if from and to are both -1, it means
 311     // (in wxWindows) that all text should be selected.
 312     // This translates into Windows convention
 313     if ((from == -1) && (to == -1))
 314     {
 315       fromChar = 0;
 316       toChar = -1;
 317     }
 318
 319 #ifdef __WIN32__
 320     SendMessage(hWnd, CB_SETEDITSEL, (WPARAM)fromChar, (LPARAM)toChar);
 321 //    SendMessage(hWnd, EM_SCROLLCARET, (WPARAM)0, (LPARAM)0);
 322 #else
 323     // WPARAM is 0: selection is scrolled into view
 324     SendMessage(hWnd, CB_SETEDITSEL, (WPARAM)0, (LPARAM)MAKELONG(fromChar, toChar));
 325 #endif
 326 }
 327
 328 void wxComboBox::DoMoveWindow(int x, int y, int width, int height)
 329 {
 330     int cx, cy;
 331     wxGetCharSize(GetHWND(), &cx, &cy, &GetFont());
 332
 333     int n = GetCount();
 334     if ( !n )
 335         n = 10;
 336
 337     height = n * EDIT_HEIGHT_FROM_CHAR_HEIGHT(cy);
 338
 339     wxControl::DoMoveWindow(x, y, width, height);
 340 }
 341
 342 wxSize wxComboBox::DoGetBestSize() const
 343 {
 344     // the choice calculates the horz size correctly, but not the vertical
 345     // component: correct it
 346     wxSize size = wxChoice::DoGetBestSize();
 347
 348     int cx, cy;
 349     wxGetCharSize(GetHWND(), &cx, &cy, &GetFont());
 350     size.y = EDIT_HEIGHT_FROM_CHAR_HEIGHT(cy);
 351
 352     return size;
 353 }
 354
 355 #endif
 356  // wxUSE_COMBOBOX
 357