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 USE_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(wxEVENT_TYPE_COMBOBOX_COMMAND, 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 return FALSE;
  50 }
  51
  52 bool wxComboBox::Create(wxWindow *parent, wxWindowID id,
  53            const wxString& value,
  54            const wxPoint& pos,
  55            const wxSize& size,
  56                    int n, const wxString choices[],
  57                    long style,
  58            const wxValidator& validator,
  59            const wxString& name)
  60 {
  61   SetName(name);
  62   SetValidator(validator);
  63   if (parent) parent->AddChild(this);
  64   SetBackgroundColour(parent->GetDefaultBackgroundColour()) ;
  65   SetForegroundColour(parent->GetDefaultForegroundColour()) ;
  66   no_strings = n;
  67
  68   m_windowStyle = style;
  69
  70   if ( id == -1 )
  71         m_windowId = (int)NewControlId();
  72   else
  73         m_windowId = id;
  74
  75   int x = pos.x;
  76   int y = pos.y;
  77   int width = size.x;
  78   int height = size.y;
  79
  80   long msStyle = WS_CHILD | WS_HSCROLL | WS_VSCROLL
  81                      | WS_TABSTOP | WS_VISIBLE | CBS_NOINTEGRALHEIGHT;
  82   if (m_windowStyle & wxCB_READONLY)
  83     msStyle |= CBS_DROPDOWNLIST;
  84   else if (m_windowStyle & wxCB_SIMPLE) // A list (shown always) and edit control
  85     msStyle |= CBS_SIMPLE;
  86   else
  87     msStyle |= CBS_DROPDOWN;
  88
  89   if (m_windowStyle & wxCB_SORT)
  90     msStyle |= CBS_SORT;
  91
  92   bool want3D;
  93   WXDWORD exStyle = Determine3DEffects(WS_EX_CLIENTEDGE, &want3D) ;
  94
  95   // Even with extended styles, need to combine with WS_BORDER
  96   // for them to look right.
  97   if (want3D || (m_windowStyle & wxSIMPLE_BORDER) || (m_windowStyle & wxRAISED_BORDER) ||
  98        (m_windowStyle & wxSUNKEN_BORDER) || (m_windowStyle & wxDOUBLE_BORDER))
  99     msStyle |= WS_BORDER;
 100
 101   HWND wx_combo = CreateWindowEx(exStyle, "COMBOBOX", NULL,
 102                    msStyle,
 103                    0, 0, 0, 0, (HWND) parent->GetHWND(), (HMENU)m_windowId,
 104                    wxGetInstance(), NULL);
 105 /*
 106 #if CTL3D
 107   if (want3D)
 108   {
 109     Ctl3dSubclassCtl(wx_combo);
 110     m_useCtl3D = TRUE;
 111   }
 112 #endif
 113 */
 114
 115   m_hWnd = (WXHWND)wx_combo;
 116
 117   // Subclass again for purposes of dialog editing mode
 118   SubclassWin((WXHWND)wx_combo);
 119
 120   SetFont(* parent->GetFont());
 121   int i;
 122   for (i = 0; i < n; i++)
 123     SendMessage(wx_combo, CB_INSERTSTRING, i, (LONG)(const char *)choices[i]);
 124   SendMessage(wx_combo, CB_SETCURSEL, i, 0);
 125
 126   SetSize(x, y, width, height);
 127   if ( value != "" )
 128     SetWindowText(wx_combo, (const char *)value);
 129
 130   return TRUE;
 131 }
 132
 133 wxString wxComboBox::GetValue(void) const
 134 {
 135   GetWindowText((HWND) GetHWND(), wxBuffer, 500);
 136   return wxString(wxBuffer);
 137 }
 138
 139 void wxComboBox::SetValue(const wxString& value)
 140 {
 141   // If newlines are denoted by just 10, must stick 13 in front.
 142   int singletons = 0;
 143   int len = value.Length();
 144   int i;
 145   for (i = 0; i < len; i ++)
 146   {
 147     if ((i > 0) && (value[i] == 10) && (value[i-1] != 13))
 148       singletons ++;
 149   }
 150   if (singletons > 0)
 151   {
 152     char *tmp = new char[len + singletons + 1];
 153     int j = 0;
 154     for (i = 0; i < len; i ++)
 155     {
 156       if ((i > 0) && (value[i] == 10) && (value[i-1] != 13))
 157       {
 158         tmp[j] = 13;
 159         j ++;
 160       }
 161       tmp[j] = value[i];
 162       j ++;
 163     }
 164     tmp[j] = 0;
 165     SetWindowText((HWND) GetHWND(), tmp);
 166     delete[] tmp;
 167   }
 168   else
 169     SetWindowText((HWND) GetHWND(), (const char *)value);
 170 }
 171
 172 // Clipboard operations
 173 void wxComboBox::Copy(void)
 174 {
 175   HWND hWnd = (HWND) GetHWND();
 176   SendMessage(hWnd, WM_COPY, 0, 0L);
 177 }
 178
 179 void wxComboBox::Cut(void)
 180 {
 181   HWND hWnd = (HWND) GetHWND();
 182   SendMessage(hWnd, WM_CUT, 0, 0L);
 183 }
 184
 185 void wxComboBox::Paste(void)
 186 {
 187   HWND hWnd = (HWND) GetHWND();
 188   SendMessage(hWnd, WM_PASTE, 0, 0L);
 189 }
 190
 191 void wxComboBox::SetEditable(bool editable)
 192 {
 193   // Can't implement in MSW?
 194 //  HWND hWnd = (HWND) GetHWND();
 195 //  SendMessage(hWnd, EM_SETREADONLY, (WPARAM)!editable, (LPARAM)0L);
 196 }
 197
 198 void wxComboBox::SetInsertionPoint(long pos)
 199 {
 200 /*
 201   HWND hWnd = (HWND) GetHWND();
 202 #ifdef __WIN32__
 203   SendMessage(hWnd, EM_SETSEL, pos, pos);
 204   SendMessage(hWnd, EM_SCROLLCARET, (WPARAM)0, (LPARAM)0);
 205 #else
 206   SendMessage(hWnd, EM_SETSEL, 0, MAKELPARAM(pos, pos));
 207 #endif
 208   char *nothing = "";
 209   SendMessage(hWnd, EM_REPLACESEL, 0, (LPARAM)nothing);
 210 */
 211 }
 212
 213 void wxComboBox::SetInsertionPointEnd(void)
 214 {
 215 /*
 216   long pos = GetLastPosition();
 217   SetInsertionPoint(pos);
 218 */
 219 }
 220
 221 long wxComboBox::GetInsertionPoint(void) const
 222 {
 223 /*
 224   DWORD Pos=(DWORD)SendMessage((HWND) GetHWND(), EM_GETSEL, 0, 0L);
 225   return Pos&0xFFFF;
 226 */
 227   return 0;
 228 }
 229
 230 long wxComboBox::GetLastPosition(void) const
 231 {
 232 /*
 233     HWND hWnd = (HWND) GetHWND();
 234
 235     // Will always return a number > 0 (according to docs)
 236     int noLines = (int)SendMessage(hWnd, EM_GETLINECOUNT, (WPARAM)0, (LPARAM)0L);
 237
 238     // This gets the char index for the _beginning_ of the last line
 239     int charIndex = (int)SendMessage(hWnd, EM_LINEINDEX, (WPARAM)(noLines-1), (LPARAM)0L);
 240
 241     // Get number of characters in the last line. We'll add this to the character
 242     // index for the last line, 1st position.
 243     int lineLength = (int)SendMessage(hWnd, EM_LINELENGTH, (WPARAM)charIndex, (LPARAM)0L);
 244
 245     return (long)(charIndex + lineLength);
 246 */
 247   return 0;
 248 }
 249
 250 void wxComboBox::Replace(long from, long to, const wxString& value)
 251 {
 252 #if USE_CLIPBOARD
 253     HWND hWnd = (HWND) GetHWND();
 254     long fromChar = from;
 255     long toChar = to;
 256
 257     // Set selection and remove it
 258 #ifdef __WIN32__
 259     SendMessage(hWnd, CB_SETEDITSEL, fromChar, toChar);
 260 #else
 261     SendMessage(hWnd, CB_SETEDITSEL, (WPARAM)0, (LPARAM)MAKELONG(fromChar, toChar));
 262 #endif
 263     SendMessage(hWnd, WM_CUT, (WPARAM)0, (LPARAM)0);
 264
 265     // Now replace with 'value', by pasting.
 266     wxSetClipboardData(wxDF_TEXT, (wxObject *)(const char *)value, 0, 0);
 267
 268     // Paste into edit control
 269     SendMessage(hWnd, WM_PASTE, (WPARAM)0, (LPARAM)0L);
 270 #endif
 271 }
 272
 273 void wxComboBox::Remove(long from, long to)
 274 {
 275     HWND hWnd = (HWND) GetHWND();
 276     long fromChar = from;
 277     long toChar = to;
 278
 279     // Cut all selected text
 280 #ifdef __WIN32__
 281     SendMessage(hWnd, CB_SETEDITSEL, fromChar, toChar);
 282 #else
 283     SendMessage(hWnd, CB_SETEDITSEL, (WPARAM)0, (LPARAM)MAKELONG(fromChar, toChar));
 284 #endif
 285     SendMessage(hWnd, WM_CUT, (WPARAM)0, (LPARAM)0);
 286 }
 287
 288 void wxComboBox::SetSelection(long from, long to)
 289 {
 290     HWND hWnd = (HWND) GetHWND();
 291     long fromChar = from;
 292     long toChar = to;
 293     // if from and to are both -1, it means
 294     // (in wxWindows) that all text should be selected.
 295     // This translates into Windows convention
 296     if ((from == -1) && (to == -1))
 297     {
 298       fromChar = 0;
 299       toChar = -1;
 300     }
 301
 302 #ifdef __WIN32__
 303     SendMessage(hWnd, CB_SETEDITSEL, (WPARAM)fromChar, (LPARAM)toChar);
 304 //    SendMessage(hWnd, EM_SCROLLCARET, (WPARAM)0, (LPARAM)0);
 305 #else
 306     // WPARAM is 0: selection is scrolled into view
 307     SendMessage(hWnd, CB_SETEDITSEL, (WPARAM)0, (LPARAM)MAKELONG(fromChar, toChar));
 308 #endif
 309 }
 310
 311 #endif
 312  // USE_COMBOBOX
 313