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     wxCommandEvent event(wxEVT_COMMAND_COMBOBOX_SELECTED, m_windowId);
  42     event.SetInt(GetSelection());
  43     event.SetEventObject(this);
  44     event.SetString(GetStringSelection());
  45     ProcessCommand(event);
  46
  47     return TRUE;
  48   }
  49   else if (param == CBN_EDITCHANGE)
  50   {
  51     wxCommandEvent event(wxEVT_COMMAND_TEXT_UPDATED, m_windowId);
  52     event.SetString(GetValue());
  53     event.SetEventObject(this);
  54     ProcessCommand(event);
  55
  56     return TRUE;
  57   }
  58   else
  59       return FALSE;
  60 }
  61
  62 bool wxComboBox::Create(wxWindow *parent, wxWindowID id,
  63                         const wxString& value,
  64                         const wxPoint& pos,
  65                         const wxSize& size,
  66                         int n, const wxString choices[],
  67                         long style,
  68                         const wxValidator& validator,
  69                         const wxString& name)
  70 {
  71   SetName(name);
  72   SetValidator(validator);
  73   if (parent) parent->AddChild(this);
  74   SetBackgroundColour(parent->GetBackgroundColour()) ;
  75   SetForegroundColour(parent->GetForegroundColour()) ;
  76   m_noStrings = 0;
  77
  78   m_windowStyle = style;
  79
  80   if ( id == -1 )
  81     m_windowId = (int)NewControlId();
  82   else
  83     m_windowId = id;
  84
  85   int x = pos.x;
  86   int y = pos.y;
  87   int width = size.x;
  88   int height = size.y;
  89
  90   long msStyle = WS_CHILD | WS_HSCROLL | WS_VSCROLL |
  91                  WS_TABSTOP | WS_VISIBLE | CBS_NOINTEGRALHEIGHT;
  92
  93   if (m_windowStyle & wxCB_READONLY)
  94     msStyle |= CBS_DROPDOWNLIST;
  95   else if (m_windowStyle & wxCB_SIMPLE)
  96     msStyle |= CBS_SIMPLE; // A list (shown always) and edit control
  97   else
  98     msStyle |= CBS_DROPDOWN;
  99
 100   if (m_windowStyle & wxCB_SORT)
 101     msStyle |= CBS_SORT;
 102
 103   bool want3D;
 104   WXDWORD exStyle = Determine3DEffects(WS_EX_CLIENTEDGE, &want3D) ;
 105
 106   // Even with extended styles, need to combine with WS_BORDER
 107   // for them to look right.
 108   if ( want3D || wxStyleHasBorder(m_windowStyle) )
 109     msStyle |= WS_BORDER;
 110
 111   m_hWnd = (WXHWND)::CreateWindowEx(exStyle, _T("COMBOBOX"), NULL,
 112                    msStyle,
 113                    0, 0, 0, 0, (HWND) parent->GetHWND(), (HMENU)m_windowId,
 114                    wxGetInstance(), NULL);
 115
 116   wxCHECK_MSG( m_hWnd, FALSE, _T("Failed to create combobox") );
 117
 118 /*
 119 #if wxUSE_CTL3D
 120   if (want3D)
 121   {
 122     Ctl3dSubclassCtl(wx_combo);
 123     m_useCtl3D = TRUE;
 124   }
 125 #endif
 126 */
 127
 128   // Subclass again for purposes of dialog editing mode
 129   SubclassWin(m_hWnd);
 130
 131   SetFont(parent->GetFont());
 132   int i;
 133   for (i = 0; i < n; i++)
 134   {
 135     Append(choices[i]);
 136   }
 137
 138   SetSelection(i);
 139
 140   SetSize(x, y, width, height);
 141   if ( !value.IsEmpty() )
 142   {
 143     SetValue(value);
 144   }
 145
 146   return TRUE;
 147 }
 148
 149 void wxComboBox::SetValue(const wxString& value)
 150 {
 151   // If newlines are denoted by just 10, must stick 13 in front.
 152   int singletons = 0;
 153   int len = value.Length();
 154   int i;
 155   for (i = 0; i < len; i ++)
 156   {
 157     if ((i > 0) && (value[i] == 10) && (value[i-1] != 13))
 158       singletons ++;
 159   }
 160   if (singletons > 0)
 161   {
 162     wxChar *tmp = new wxChar[len + singletons + 1];
 163     int j = 0;
 164     for (i = 0; i < len; i ++)
 165     {
 166       if ((i > 0) && (value[i] == 10) && (value[i-1] != 13))
 167       {
 168         tmp[j] = 13;
 169         j ++;
 170       }
 171       tmp[j] = value[i];
 172       j ++;
 173     }
 174     tmp[j] = 0;
 175     SetWindowText(GetHwnd(), tmp);
 176     delete[] tmp;
 177   }
 178   else
 179     SetWindowText(GetHwnd(), value);
 180 }
 181
 182 // Clipboard operations
 183 void wxComboBox::Copy()
 184 {
 185   HWND hWnd = GetHwnd();
 186   SendMessage(hWnd, WM_COPY, 0, 0L);
 187 }
 188
 189 void wxComboBox::Cut()
 190 {
 191   HWND hWnd = GetHwnd();
 192   SendMessage(hWnd, WM_CUT, 0, 0L);
 193 }
 194
 195 void wxComboBox::Paste()
 196 {
 197   HWND hWnd = GetHwnd();
 198   SendMessage(hWnd, WM_PASTE, 0, 0L);
 199 }
 200
 201 void wxComboBox::SetEditable(bool editable)
 202 {
 203   // Can't implement in MSW?
 204 //  HWND hWnd = GetHwnd();
 205 //  SendMessage(hWnd, EM_SETREADONLY, (WPARAM)!editable, (LPARAM)0L);
 206 }
 207
 208 void wxComboBox::SetInsertionPoint(long pos)
 209 {
 210 /*
 211   HWND hWnd = GetHwnd();
 212 #ifdef __WIN32__
 213   SendMessage(hWnd, EM_SETSEL, pos, pos);
 214   SendMessage(hWnd, EM_SCROLLCARET, (WPARAM)0, (LPARAM)0);
 215 #else
 216   SendMessage(hWnd, EM_SETSEL, 0, MAKELPARAM(pos, pos));
 217 #endif
 218   char *nothing = "";
 219   SendMessage(hWnd, EM_REPLACESEL, 0, (LPARAM)nothing);
 220 */
 221 }
 222
 223 void wxComboBox::SetInsertionPointEnd()
 224 {
 225 /*
 226   long pos = GetLastPosition();
 227   SetInsertionPoint(pos);
 228 */
 229 }
 230
 231 long wxComboBox::GetInsertionPoint() const
 232 {
 233 /*
 234   DWORD Pos=(DWORD)SendMessage(GetHwnd(), EM_GETSEL, 0, 0L);
 235   return Pos&0xFFFF;
 236 */
 237   return 0;
 238 }
 239
 240 long wxComboBox::GetLastPosition() const
 241 {
 242 /*
 243     HWND hWnd = GetHwnd();
 244
 245     // Will always return a number > 0 (according to docs)
 246     int noLines = (int)SendMessage(hWnd, EM_GETLINECOUNT, (WPARAM)0, (LPARAM)0L);
 247
 248     // This gets the char index for the _beginning_ of the last line
 249     int charIndex = (int)SendMessage(hWnd, EM_LINEINDEX, (WPARAM)(noLines-1), (LPARAM)0L);
 250
 251     // Get number of characters in the last line. We'll add this to the character
 252     // index for the last line, 1st position.
 253     int lineLength = (int)SendMessage(hWnd, EM_LINELENGTH, (WPARAM)charIndex, (LPARAM)0L);
 254
 255     return (long)(charIndex + lineLength);
 256 */
 257   return 0;
 258 }
 259
 260 void wxComboBox::Replace(long from, long to, const wxString& value)
 261 {
 262 #if wxUSE_CLIPBOARD
 263     HWND hWnd = GetHwnd();
 264     long fromChar = from;
 265     long toChar = to;
 266
 267     // Set selection and remove it
 268 #ifdef __WIN32__
 269     SendMessage(hWnd, CB_SETEDITSEL, fromChar, toChar);
 270 #else
 271     SendMessage(hWnd, CB_SETEDITSEL, (WPARAM)0, (LPARAM)MAKELONG(fromChar, toChar));
 272 #endif
 273     SendMessage(hWnd, WM_CUT, (WPARAM)0, (LPARAM)0);
 274
 275     // Now replace with 'value', by pasting.
 276     wxSetClipboardData(wxDF_TEXT, (wxObject *)(const wxChar *)value, 0, 0);
 277
 278     // Paste into edit control
 279     SendMessage(hWnd, WM_PASTE, (WPARAM)0, (LPARAM)0L);
 280 #endif
 281 }
 282
 283 void wxComboBox::Remove(long from, long to)
 284 {
 285     HWND hWnd = GetHwnd();
 286     long fromChar = from;
 287     long toChar = to;
 288
 289     // Cut all selected text
 290 #ifdef __WIN32__
 291     SendMessage(hWnd, CB_SETEDITSEL, fromChar, toChar);
 292 #else
 293     SendMessage(hWnd, CB_SETEDITSEL, (WPARAM)0, (LPARAM)MAKELONG(fromChar, toChar));
 294 #endif
 295     SendMessage(hWnd, WM_CUT, (WPARAM)0, (LPARAM)0);
 296 }
 297
 298 void wxComboBox::SetSelection(long from, long to)
 299 {
 300     HWND hWnd = GetHwnd();
 301     long fromChar = from;
 302     long toChar = to;
 303     // if from and to are both -1, it means
 304     // (in wxWindows) that all text should be selected.
 305     // This translates into Windows convention
 306     if ((from == -1) && (to == -1))
 307     {
 308       fromChar = 0;
 309       toChar = -1;
 310     }
 311
 312 #ifdef __WIN32__
 313     SendMessage(hWnd, CB_SETEDITSEL, (WPARAM)fromChar, (LPARAM)toChar);
 314 //    SendMessage(hWnd, EM_SCROLLCARET, (WPARAM)0, (LPARAM)0);
 315 #else
 316     // WPARAM is 0: selection is scrolled into view
 317     SendMessage(hWnd, CB_SETEDITSEL, (WPARAM)0, (LPARAM)MAKELONG(fromChar, toChar));
 318 #endif
 319 }
 320
 321 void wxComboBox::DoSetSize(int x, int y,
 322                            int width, int height,
 323                            int sizeFlags)
 324 {
 325     wxControl::DoSetSize(x, y, width, height, sizeFlags);
 326
 327     // VZ: for unknown (to me) reasons, if we don't do this, the combobox
 328     //     somehow is hidden by the static boxes, although static boxes do
 329     //     put themselves at the very end of Z-order.
 330     if ( !::SetWindowPos(GetHwnd(), HWND_BOTTOM, 0, 0, 0, 0,
 331                          SWP_NOMOVE | SWP_NOSIZE) )
 332     {
 333         wxLogLastError(_T("SetWindowPos"));
 334     }
 335 }
 336
 337 #endif
 338  // wxUSE_COMBOBOX
 339