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(copystring(GetStringSelection()));
  45     ProcessCommand(event);
  46     delete[] event.GetString();
  47     return TRUE;
  48   }
  49   else if (param == CBN_EDITCHANGE)
  50   {
  51     wxCommandEvent event(wxEVT_COMMAND_TEXT_UPDATED, m_windowId);
  52     event.SetString(copystring(GetValue()));
  53     event.SetEventObject(this);
  54     ProcessCommand(event);
  55     delete[] event.GetString();
  56     return TRUE;
  57   }
  58   else return FALSE;
  59 }
  60
  61 bool wxComboBox::Create(wxWindow *parent, wxWindowID id,
  62                         const wxString& value,
  63                         const wxPoint& pos,
  64                         const wxSize& size,
  65                         int n, const wxString choices[],
  66                         long style,
  67                         const wxValidator& validator,
  68                         const wxString& name)
  69 {
  70   SetName(name);
  71   SetValidator(validator);
  72   if (parent) parent->AddChild(this);
  73   SetBackgroundColour(parent->GetBackgroundColour()) ;
  74   SetForegroundColour(parent->GetForegroundColour()) ;
  75   m_noStrings = n;
  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_HSCROLL | WS_VSCROLL |
  90                  WS_TABSTOP | WS_VISIBLE | 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, "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, "Failed to create combobox" );
 116
 117 /*
 118 #if 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 wxString wxComboBox::GetValue() const
 149 {
 150   return wxGetWindowText(GetHWND());
 151 }
 152
 153 void wxComboBox::SetValue(const wxString& value)
 154 {
 155   // If newlines are denoted by just 10, must stick 13 in front.
 156   int singletons = 0;
 157   int len = value.Length();
 158   int i;
 159   for (i = 0; i < len; i ++)
 160   {
 161     if ((i > 0) && (value[i] == 10) && (value[i-1] != 13))
 162       singletons ++;
 163   }
 164   if (singletons > 0)
 165   {
 166     char *tmp = new char[len + singletons + 1];
 167     int j = 0;
 168     for (i = 0; i < len; i ++)
 169     {
 170       if ((i > 0) && (value[i] == 10) && (value[i-1] != 13))
 171       {
 172         tmp[j] = 13;
 173         j ++;
 174       }
 175       tmp[j] = value[i];
 176       j ++;
 177     }
 178     tmp[j] = 0;
 179     SetWindowText((HWND) GetHWND(), tmp);
 180     delete[] tmp;
 181   }
 182   else
 183     SetWindowText((HWND) GetHWND(), (const char *)value);
 184 }
 185
 186 // Clipboard operations
 187 void wxComboBox::Copy()
 188 {
 189   HWND hWnd = (HWND) GetHWND();
 190   SendMessage(hWnd, WM_COPY, 0, 0L);
 191 }
 192
 193 void wxComboBox::Cut()
 194 {
 195   HWND hWnd = (HWND) GetHWND();
 196   SendMessage(hWnd, WM_CUT, 0, 0L);
 197 }
 198
 199 void wxComboBox::Paste()
 200 {
 201   HWND hWnd = (HWND) GetHWND();
 202   SendMessage(hWnd, WM_PASTE, 0, 0L);
 203 }
 204
 205 void wxComboBox::SetEditable(bool editable)
 206 {
 207   // Can't implement in MSW?
 208 //  HWND hWnd = (HWND) GetHWND();
 209 //  SendMessage(hWnd, EM_SETREADONLY, (WPARAM)!editable, (LPARAM)0L);
 210 }
 211
 212 void wxComboBox::SetInsertionPoint(long pos)
 213 {
 214 /*
 215   HWND hWnd = (HWND) GetHWND();
 216 #ifdef __WIN32__
 217   SendMessage(hWnd, EM_SETSEL, pos, pos);
 218   SendMessage(hWnd, EM_SCROLLCARET, (WPARAM)0, (LPARAM)0);
 219 #else
 220   SendMessage(hWnd, EM_SETSEL, 0, MAKELPARAM(pos, pos));
 221 #endif
 222   char *nothing = "";
 223   SendMessage(hWnd, EM_REPLACESEL, 0, (LPARAM)nothing);
 224 */
 225 }
 226
 227 void wxComboBox::SetInsertionPointEnd()
 228 {
 229 /*
 230   long pos = GetLastPosition();
 231   SetInsertionPoint(pos);
 232 */
 233 }
 234
 235 long wxComboBox::GetInsertionPoint() const
 236 {
 237 /*
 238   DWORD Pos=(DWORD)SendMessage((HWND) GetHWND(), EM_GETSEL, 0, 0L);
 239   return Pos&0xFFFF;
 240 */
 241   return 0;
 242 }
 243
 244 long wxComboBox::GetLastPosition() const
 245 {
 246 /*
 247     HWND hWnd = (HWND) GetHWND();
 248
 249     // Will always return a number > 0 (according to docs)
 250     int noLines = (int)SendMessage(hWnd, EM_GETLINECOUNT, (WPARAM)0, (LPARAM)0L);
 251
 252     // This gets the char index for the _beginning_ of the last line
 253     int charIndex = (int)SendMessage(hWnd, EM_LINEINDEX, (WPARAM)(noLines-1), (LPARAM)0L);
 254
 255     // Get number of characters in the last line. We'll add this to the character
 256     // index for the last line, 1st position.
 257     int lineLength = (int)SendMessage(hWnd, EM_LINELENGTH, (WPARAM)charIndex, (LPARAM)0L);
 258
 259     return (long)(charIndex + lineLength);
 260 */
 261   return 0;
 262 }
 263
 264 void wxComboBox::Replace(long from, long to, const wxString& value)
 265 {
 266 #if wxUSE_CLIPBOARD
 267     HWND hWnd = (HWND) GetHWND();
 268     long fromChar = from;
 269     long toChar = to;
 270
 271     // Set selection and remove it
 272 #ifdef __WIN32__
 273     SendMessage(hWnd, CB_SETEDITSEL, fromChar, toChar);
 274 #else
 275     SendMessage(hWnd, CB_SETEDITSEL, (WPARAM)0, (LPARAM)MAKELONG(fromChar, toChar));
 276 #endif
 277     SendMessage(hWnd, WM_CUT, (WPARAM)0, (LPARAM)0);
 278
 279     // Now replace with 'value', by pasting.
 280     wxSetClipboardData(wxDF_TEXT, (wxObject *)(const char *)value, 0, 0);
 281
 282     // Paste into edit control
 283     SendMessage(hWnd, WM_PASTE, (WPARAM)0, (LPARAM)0L);
 284 #endif
 285 }
 286
 287 void wxComboBox::Remove(long from, long to)
 288 {
 289     HWND hWnd = (HWND) GetHWND();
 290     long fromChar = from;
 291     long toChar = to;
 292
 293     // Cut all selected text
 294 #ifdef __WIN32__
 295     SendMessage(hWnd, CB_SETEDITSEL, fromChar, toChar);
 296 #else
 297     SendMessage(hWnd, CB_SETEDITSEL, (WPARAM)0, (LPARAM)MAKELONG(fromChar, toChar));
 298 #endif
 299     SendMessage(hWnd, WM_CUT, (WPARAM)0, (LPARAM)0);
 300 }
 301
 302 void wxComboBox::SetSelection(long from, long to)
 303 {
 304     HWND hWnd = (HWND) GetHWND();
 305     long fromChar = from;
 306     long toChar = to;
 307     // if from and to are both -1, it means
 308     // (in wxWindows) that all text should be selected.
 309     // This translates into Windows convention
 310     if ((from == -1) && (to == -1))
 311     {
 312       fromChar = 0;
 313       toChar = -1;
 314     }
 315
 316 #ifdef __WIN32__
 317     SendMessage(hWnd, CB_SETEDITSEL, (WPARAM)fromChar, (LPARAM)toChar);
 318 //    SendMessage(hWnd, EM_SCROLLCARET, (WPARAM)0, (LPARAM)0);
 319 #else
 320     // WPARAM is 0: selection is scrolled into view
 321     SendMessage(hWnd, CB_SETEDITSEL, (WPARAM)0, (LPARAM)MAKELONG(fromChar, toChar));
 322 #endif
 323 }
 324
 325 #endif
 326  // wxUSE_COMBOBOX
 327