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