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, "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, "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 wxString wxComboBox::GetValue() const
 150 {
 151   return wxGetWindowText(GetHWND());
 152 }
 153
 154 void wxComboBox::SetValue(const wxString& value)
 155 {
 156   // If newlines are denoted by just 10, must stick 13 in front.
 157   int singletons = 0;
 158   int len = value.Length();
 159   int i;
 160   for (i = 0; i < len; i ++)
 161   {
 162     if ((i > 0) && (value[i] == 10) && (value[i-1] != 13))
 163       singletons ++;
 164   }
 165   if (singletons > 0)
 166   {
 167     char *tmp = new char[len + singletons + 1];
 168     int j = 0;
 169     for (i = 0; i < len; i ++)
 170     {
 171       if ((i > 0) && (value[i] == 10) && (value[i-1] != 13))
 172       {
 173         tmp[j] = 13;
 174         j ++;
 175       }
 176       tmp[j] = value[i];
 177       j ++;
 178     }
 179     tmp[j] = 0;
 180     SetWindowText((HWND) GetHWND(), tmp);
 181     delete[] tmp;
 182   }
 183   else
 184     SetWindowText((HWND) GetHWND(), (const char *)value);
 185 }
 186
 187 // Clipboard operations
 188 void wxComboBox::Copy()
 189 {
 190   HWND hWnd = (HWND) GetHWND();
 191   SendMessage(hWnd, WM_COPY, 0, 0L);
 192 }
 193
 194 void wxComboBox::Cut()
 195 {
 196   HWND hWnd = (HWND) GetHWND();
 197   SendMessage(hWnd, WM_CUT, 0, 0L);
 198 }
 199
 200 void wxComboBox::Paste()
 201 {
 202   HWND hWnd = (HWND) GetHWND();
 203   SendMessage(hWnd, WM_PASTE, 0, 0L);
 204 }
 205
 206 void wxComboBox::SetEditable(bool editable)
 207 {
 208   // Can't implement in MSW?
 209 //  HWND hWnd = (HWND) GetHWND();
 210 //  SendMessage(hWnd, EM_SETREADONLY, (WPARAM)!editable, (LPARAM)0L);
 211 }
 212
 213 void wxComboBox::SetInsertionPoint(long pos)
 214 {
 215 /*
 216   HWND hWnd = (HWND) GetHWND();
 217 #ifdef __WIN32__
 218   SendMessage(hWnd, EM_SETSEL, pos, pos);
 219   SendMessage(hWnd, EM_SCROLLCARET, (WPARAM)0, (LPARAM)0);
 220 #else
 221   SendMessage(hWnd, EM_SETSEL, 0, MAKELPARAM(pos, pos));
 222 #endif
 223   char *nothing = "";
 224   SendMessage(hWnd, EM_REPLACESEL, 0, (LPARAM)nothing);
 225 */
 226 }
 227
 228 void wxComboBox::SetInsertionPointEnd()
 229 {
 230 /*
 231   long pos = GetLastPosition();
 232   SetInsertionPoint(pos);
 233 */
 234 }
 235
 236 long wxComboBox::GetInsertionPoint() const
 237 {
 238 /*
 239   DWORD Pos=(DWORD)SendMessage((HWND) GetHWND(), EM_GETSEL, 0, 0L);
 240   return Pos&0xFFFF;
 241 */
 242   return 0;
 243 }
 244
 245 long wxComboBox::GetLastPosition() const
 246 {
 247 /*
 248     HWND hWnd = (HWND) GetHWND();
 249
 250     // Will always return a number > 0 (according to docs)
 251     int noLines = (int)SendMessage(hWnd, EM_GETLINECOUNT, (WPARAM)0, (LPARAM)0L);
 252
 253     // This gets the char index for the _beginning_ of the last line
 254     int charIndex = (int)SendMessage(hWnd, EM_LINEINDEX, (WPARAM)(noLines-1), (LPARAM)0L);
 255
 256     // Get number of characters in the last line. We'll add this to the character
 257     // index for the last line, 1st position.
 258     int lineLength = (int)SendMessage(hWnd, EM_LINELENGTH, (WPARAM)charIndex, (LPARAM)0L);
 259
 260     return (long)(charIndex + lineLength);
 261 */
 262   return 0;
 263 }
 264
 265 void wxComboBox::Replace(long from, long to, const wxString& value)
 266 {
 267 #if wxUSE_CLIPBOARD
 268     HWND hWnd = (HWND) GetHWND();
 269     long fromChar = from;
 270     long toChar = to;
 271
 272     // Set selection and remove it
 273 #ifdef __WIN32__
 274     SendMessage(hWnd, CB_SETEDITSEL, fromChar, toChar);
 275 #else
 276     SendMessage(hWnd, CB_SETEDITSEL, (WPARAM)0, (LPARAM)MAKELONG(fromChar, toChar));
 277 #endif
 278     SendMessage(hWnd, WM_CUT, (WPARAM)0, (LPARAM)0);
 279
 280     // Now replace with 'value', by pasting.
 281     wxSetClipboardData(wxDF_TEXT, (wxObject *)(const char *)value, 0, 0);
 282
 283     // Paste into edit control
 284     SendMessage(hWnd, WM_PASTE, (WPARAM)0, (LPARAM)0L);
 285 #endif
 286 }
 287
 288 void wxComboBox::Remove(long from, long to)
 289 {
 290     HWND hWnd = (HWND) GetHWND();
 291     long fromChar = from;
 292     long toChar = to;
 293
 294     // Cut all selected text
 295 #ifdef __WIN32__
 296     SendMessage(hWnd, CB_SETEDITSEL, fromChar, toChar);
 297 #else
 298     SendMessage(hWnd, CB_SETEDITSEL, (WPARAM)0, (LPARAM)MAKELONG(fromChar, toChar));
 299 #endif
 300     SendMessage(hWnd, WM_CUT, (WPARAM)0, (LPARAM)0);
 301 }
 302
 303 void wxComboBox::SetSelection(long from, long to)
 304 {
 305     HWND hWnd = (HWND) GetHWND();
 306     long fromChar = from;
 307     long toChar = to;
 308     // if from and to are both -1, it means
 309     // (in wxWindows) that all text should be selected.
 310     // This translates into Windows convention
 311     if ((from == -1) && (to == -1))
 312     {
 313       fromChar = 0;
 314       toChar = -1;
 315     }
 316
 317 #ifdef __WIN32__
 318     SendMessage(hWnd, CB_SETEDITSEL, (WPARAM)fromChar, (LPARAM)toChar);
 319 //    SendMessage(hWnd, EM_SCROLLCARET, (WPARAM)0, (LPARAM)0);
 320 #else
 321     // WPARAM is 0: selection is scrolled into view
 322     SendMessage(hWnd, CB_SETEDITSEL, (WPARAM)0, (LPARAM)MAKELONG(fromChar, toChar));
 323 #endif
 324 }
 325
 326 #endif
 327  // wxUSE_COMBOBOX
 328