src/motif/choice.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        choice.cpp
   3 // Purpose:     wxChoice
   4 // Author:      Julian Smart
   5 // Modified by:
   6 // Created:     17/09/98
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) Julian Smart
   9 // Licence:     wxWindows licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 #ifdef __GNUG__
  13 #pragma implementation "choice.h"
  14 #endif
  15
  16 // For compilers that support precompilation, includes "wx.h".
  17 #include "wx/choice.h"
  18 #include "wx/utils.h"
  19
  20 #include <Xm/Xm.h>
  21 #include <Xm/PushBG.h>
  22 #include <Xm/PushB.h>
  23 #include <Xm/RowColumn.h>
  24
  25 #include "wx/motif/private.h"
  26
  27 #if !USE_SHARED_LIBRARY
  28 IMPLEMENT_DYNAMIC_CLASS(wxChoice, wxControl)
  29 #endif
  30
  31 void wxChoiceCallback (Widget w, XtPointer clientData,
  32                   XtPointer ptr);
  33
  34 wxChoice::wxChoice()
  35 {
  36     m_noStrings = 0;
  37     m_buttonWidget = (WXWidget) 0;
  38     m_menuWidget = (WXWidget) 0;
  39     m_widgetList = (WXWidget*) 0;
  40     m_formWidget = (WXWidget) 0;
  41 }
  42
  43 bool wxChoice::Create(wxWindow *parent, wxWindowID id,
  44            const wxPoint& pos,
  45            const wxSize& size,
  46                    int n, const wxString choices[],
  47                    long style,
  48            const wxValidator& validator,
  49            const wxString& name)
  50 {
  51     SetName(name);
  52     SetValidator(validator);
  53     m_noStrings = 0; // Starts off with none, incremented in Append
  54     m_windowStyle = style;
  55     m_buttonWidget = (WXWidget) 0;
  56     m_menuWidget = (WXWidget) 0;
  57     m_widgetList = (WXWidget*) 0;
  58     m_formWidget = (WXWidget) 0;
  59
  60     if (parent) parent->AddChild(this);
  61
  62     if ( id == -1 )
  63         m_windowId = (int)NewControlId();
  64     else
  65             m_windowId = id;
  66
  67     m_backgroundColour = parent->GetBackgroundColour();
  68     m_foregroundColour = parent->GetForegroundColour();
  69     m_windowFont = parent->GetFont();
  70
  71     Widget parentWidget = (Widget) parent->GetClientWidget();
  72
  73     m_formWidget = (WXWidget) XtVaCreateManagedWidget ((char*) (const char*) name,
  74                                         xmRowColumnWidgetClass, parentWidget,
  75                                         XmNmarginHeight, 0,
  76                                         XmNmarginWidth, 0,
  77                                         XmNpacking, XmPACK_TIGHT,
  78                                         XmNorientation, XmHORIZONTAL,
  79                                         NULL);
  80
  81     XtVaSetValues ((Widget) m_formWidget, XmNspacing, 0, NULL);
  82
  83    /*
  84     * Create the popup menu
  85     */
  86     m_menuWidget = (WXWidget) XmCreatePulldownMenu ((Widget) m_formWidget, "choiceMenu", NULL, 0);
  87
  88 //    int i;
  89     if (n > 0)
  90     {
  91         int i;
  92         for (i = 0; i < n; i++)
  93             Append (choices[i]);
  94     }
  95
  96    /*
  97     * Create button
  98     */
  99     Arg args[10];
 100     Cardinal argcnt = 0;
 101
 102     XtSetArg (args[argcnt], XmNsubMenuId, (Widget) m_menuWidget);
 103     argcnt++;
 104     XtSetArg (args[argcnt], XmNmarginWidth, 0);
 105     argcnt++;
 106     XtSetArg (args[argcnt], XmNmarginHeight, 0);
 107     argcnt++;
 108     XtSetArg (args[argcnt], XmNpacking, XmPACK_TIGHT);
 109     argcnt++;
 110     m_buttonWidget = (WXWidget) XmCreateOptionMenu ((Widget) m_formWidget, "choiceButton", args, argcnt);
 111
 112     m_mainWidget = m_buttonWidget;
 113
 114     XtManageChild ((Widget) m_buttonWidget);
 115
 116     // New code from Roland Haenel (roland_haenel@ac.cybercity.de)
 117     // Some time ago, I reported a problem with wxChoice-items under
 118     // Linux and Motif 2.0 (they caused sporadic GPFs). Now it seems
 119     // that I have found the code responsible for this behaviour.
 120 #if XmVersion >= 1002
 121 #if XmVersion <  2000
 122     Widget optionLabel = XmOptionLabelGadget ((Widget) m_buttonWidget);
 123     XtUnmanageChild (optionLabel);
 124 #endif
 125 #endif
 126
 127     XtVaSetValues((Widget) m_formWidget, XmNresizePolicy, XmRESIZE_NONE, NULL);
 128
 129     ChangeFont(FALSE);
 130
 131     AttachWidget (parent, m_buttonWidget, m_formWidget, pos.x, pos.y, size.x, size.y);
 132
 133     ChangeBackgroundColour();
 134
 135     return TRUE;
 136 }
 137
 138 wxChoice::~wxChoice()
 139 {
 140   // For some reason destroying the menuWidget
 141   // can cause crashes on some machines. It will
 142   // be deleted implicitly by deleting the parent form
 143   // anyway.
 144 //  XtDestroyWidget (menuWidget);
 145     if (m_widgetList)
 146         delete[] m_widgetList;
 147
 148     DetachWidget(GetMainWidget()); // Removes event handlers
 149
 150     XtDestroyWidget((Widget) m_formWidget);
 151     m_formWidget = (WXWidget) 0;
 152
 153     // Presumably the other widgets have been deleted now, via the form
 154     m_mainWidget = (WXWidget) 0;
 155     m_buttonWidget = (WXWidget) 0;
 156 }
 157
 158 void wxChoice::Append(const wxString& item)
 159 {
 160   wxStripMenuCodes ((char *)(const char *)item, wxBuffer);
 161   Widget w = XtVaCreateManagedWidget (wxBuffer,
 162 #if USE_GADGETS
 163                                       xmPushButtonGadgetClass, (Widget) m_menuWidget,
 164 #else
 165                                       xmPushButtonWidgetClass, (Widget) m_menuWidget,
 166 #endif
 167                                       NULL);
 168
 169   DoChangeBackgroundColour((WXWidget) w, m_backgroundColour);
 170
 171   if (m_windowFont.Ok())
 172     XtVaSetValues (w,
 173                    XmNfontList, (XmFontList) m_windowFont.GetFontList(1.0, XtDisplay((Widget) m_formWidget)),
 174                    NULL);
 175
 176   WXWidget *new_widgetList = new WXWidget[m_noStrings + 1];
 177   int i;
 178   if (m_widgetList)
 179     for (i = 0; i < m_noStrings; i++)
 180       new_widgetList[i] = m_widgetList[i];
 181
 182   new_widgetList[m_noStrings] = (WXWidget) w;
 183
 184   if (m_widgetList)
 185     delete[] m_widgetList;
 186   m_widgetList = new_widgetList;
 187
 188   char mnem = wxFindMnemonic ((char*) (const char*) item);
 189   if (mnem != 0)
 190     XtVaSetValues (w, XmNmnemonic, mnem, NULL);
 191
 192   XtAddCallback (w, XmNactivateCallback, (XtCallbackProc) wxChoiceCallback, (XtPointer) this);
 193
 194   if (m_noStrings == 0 && m_buttonWidget)
 195     {
 196       XtVaSetValues ((Widget) m_buttonWidget, XmNmenuHistory, w, NULL);
 197       Widget label = XmOptionButtonGadget ((Widget) m_buttonWidget);
 198       XmString text = XmStringCreateSimple ((char*) (const char*) item);
 199       XtVaSetValues (label,
 200                      XmNlabelString, text,
 201                      NULL);
 202       XmStringFree (text);
 203     }
 204   wxNode *node = m_stringList.Add (item);
 205   XtVaSetValues (w, XmNuserData, node->Data (), NULL);
 206
 207   m_noStrings ++;
 208 }
 209
 210 void wxChoice::Delete(int WXUNUSED(n))
 211 {
 212     wxFAIL_MSG( "Sorry, wxChoice::Delete isn't implemented yet. Maybe you'd like to volunteer? :-)" );
 213
 214     // What should we do -- remove the callback for this button widget,
 215     // delete the m_stringList entry, delete the button widget, construct a new widget list
 216     // (see Append)
 217
 218     // TODO
 219     m_noStrings --;
 220 }
 221
 222 void wxChoice::Clear()
 223 {
 224     m_stringList.Clear ();
 225     int i;
 226     for (i = 0; i < m_noStrings; i++)
 227     {
 228         XtUnmanageChild ((Widget) m_widgetList[i]);
 229         XtDestroyWidget ((Widget) m_widgetList[i]);
 230     }
 231     if (m_noStrings)
 232         delete[] m_widgetList;
 233     m_widgetList = (WXWidget*) NULL;
 234     if (m_buttonWidget)
 235         XtVaSetValues ((Widget) m_buttonWidget, XmNmenuHistory, (Widget) NULL, NULL);
 236     m_noStrings = 0;
 237 }
 238
 239 int wxChoice::GetSelection() const
 240 {
 241   XmString text;
 242   char *s;
 243   Widget label = XmOptionButtonGadget ((Widget) m_buttonWidget);
 244   XtVaGetValues (label,
 245          XmNlabelString, &text,
 246          NULL);
 247
 248   if (XmStringGetLtoR (text, XmSTRING_DEFAULT_CHARSET, &s))
 249   {
 250       int i = 0;
 251       for (wxNode * node = m_stringList.First (); node; node = node->Next ())
 252       {
 253         char *s1 = (char *) node->Data ();
 254         if (s1 == s || strcmp (s1, s) == 0)
 255         {
 256           XmStringFree(text) ;
 257           XtFree (s);
 258           return i;
 259         }
 260         else
 261             i++;
 262       }            // for()
 263
 264       XmStringFree(text) ;
 265       XtFree (s);
 266       return -1;
 267   }
 268   XmStringFree(text) ;
 269   return -1;
 270 }
 271
 272 void wxChoice::SetSelection(int n)
 273 {
 274   m_inSetValue = TRUE;
 275
 276   wxNode *node = m_stringList.Nth (n);
 277   if (node)
 278     {
 279       Dimension selectionWidth, selectionHeight;
 280
 281       char *s = (char *) node->Data ();
 282       XmString text = XmStringCreateSimple (s);
 283       XtVaGetValues ((Widget) m_widgetList[n], XmNwidth, &selectionWidth, XmNheight, &selectionHeight, NULL);
 284       Widget label = XmOptionButtonGadget ((Widget) m_buttonWidget);
 285       XtVaSetValues (label,
 286                      XmNlabelString, text,
 287                      NULL);
 288       XmStringFree (text);
 289       XtVaSetValues ((Widget) m_buttonWidget,
 290                      XmNwidth, selectionWidth, XmNheight, selectionHeight,
 291                      XmNmenuHistory, (Widget) m_widgetList[n], NULL);
 292     }
 293   m_inSetValue = FALSE;
 294 }
 295
 296 int wxChoice::FindString(const wxString& s) const
 297 {
 298     int i = 0;
 299     for (wxNode * node = m_stringList.First (); node; node = node->Next ())
 300     {
 301         char *s1 = (char *) node->Data ();
 302         if (s == s1)
 303         {
 304             return i;
 305         }
 306         else
 307             i++;
 308     }
 309     return -1;
 310 }
 311
 312 wxString wxChoice::GetString(int n) const
 313 {
 314   wxNode *node = m_stringList.Nth (n);
 315   if (node)
 316     return wxString((char *) node->Data ());
 317   else
 318     return wxEmptyString;
 319 }
 320
 321 void wxChoice::SetColumns(int n)
 322 {
 323   if (n<1) n = 1 ;
 324
 325   short numColumns = n ;
 326   Arg args[3];
 327
 328   XtSetArg(args[0], XmNnumColumns, numColumns);
 329   XtSetArg(args[1], XmNpacking, XmPACK_COLUMN);
 330   XtSetValues((Widget) m_menuWidget,args,2) ;
 331 }
 332
 333 int wxChoice::GetColumns(void) const
 334 {
 335   short numColumns ;
 336
 337   XtVaGetValues((Widget) m_menuWidget,XmNnumColumns,&numColumns,NULL) ;
 338   return numColumns ;
 339 }
 340
 341 void wxChoice::SetFocus()
 342 {
 343   XmProcessTraversal(XtParent((Widget)m_mainWidget), XmTRAVERSE_CURRENT);
 344 }
 345
 346 void wxChoice::SetSize(int x, int y, int width, int height, int sizeFlags)
 347 {
 348     XtVaSetValues((Widget) m_formWidget, XmNresizePolicy, XmRESIZE_ANY, NULL);
 349     bool managed = XtIsManaged((Widget) m_formWidget);
 350
 351     if (managed)
 352         XtUnmanageChild ((Widget) m_formWidget);
 353
 354     int actualWidth = width, actualHeight = height;
 355
 356     if (width > -1)
 357     {
 358         int i;
 359         for (i = 0; i < m_noStrings; i++)
 360             XtVaSetValues ((Widget) m_widgetList[i], XmNwidth, actualWidth, NULL);
 361         XtVaSetValues ((Widget) m_buttonWidget, XmNwidth, actualWidth,
 362              NULL);
 363     }
 364     if (height > -1)
 365     {
 366         int i;
 367         for (i = 0; i < m_noStrings; i++)
 368             XtVaSetValues ((Widget) m_widgetList[i], XmNheight, actualHeight, NULL);
 369         XtVaSetValues ((Widget) m_buttonWidget, XmNheight, actualHeight,
 370              NULL);
 371     }
 372
 373     if (managed)
 374         XtManageChild ((Widget) m_formWidget);
 375     XtVaSetValues((Widget) m_formWidget, XmNresizePolicy, XmRESIZE_NONE, NULL);
 376
 377     wxControl::SetSize (x, y, width, height, sizeFlags);
 378 }
 379
 380 wxString wxChoice::GetStringSelection () const
 381 {
 382     int sel = GetSelection ();
 383     if (sel > -1)
 384         return wxString(this->GetString (sel));
 385     else
 386         return wxEmptyString;
 387 }
 388
 389 bool wxChoice::SetStringSelection (const wxString& s)
 390 {
 391     int sel = FindString (s);
 392     if (sel > -1)
 393         {
 394             SetSelection (sel);
 395             return TRUE;
 396         }
 397     else
 398         return FALSE;
 399 }
 400
 401 void wxChoice::Command(wxCommandEvent & event)
 402 {
 403     SetSelection (event.GetInt());
 404     ProcessCommand (event);
 405 }
 406
 407 void wxChoiceCallback (Widget w, XtPointer clientData, XtPointer WXUNUSED(ptr))
 408 {
 409     wxChoice *item = (wxChoice *) clientData;
 410     if (item)
 411     {
 412         if (item->InSetValue())
 413             return;
 414
 415         char *s = NULL;
 416         XtVaGetValues (w, XmNuserData, &s, NULL);
 417         if (s)
 418         {
 419             wxCommandEvent event (wxEVT_COMMAND_CHOICE_SELECTED, item->GetId());
 420             event.SetEventObject(item);
 421             event.m_commandInt = item->FindString (s);
 422 //            event.m_commandString = s;
 423             item->ProcessCommand (event);
 424         }
 425     }
 426 }
 427
 428 void wxChoice::ChangeFont(bool keepOriginalSize)
 429 {
 430     // Note that this causes the widget to be resized back
 431     // to its original size! We therefore have to set the size
 432     // back again. TODO: a better way in Motif?
 433     if (m_windowFont.Ok())
 434     {
 435         int width, height, width1, height1;
 436         GetSize(& width, & height);
 437
 438         XmFontList fontList = (XmFontList) m_windowFont.GetFontList(1.0, XtDisplay((Widget) m_mainWidget));
 439         XtVaSetValues ((Widget) m_mainWidget, XmNfontList, fontList, NULL);
 440         XtVaSetValues ((Widget) m_buttonWidget, XmNfontList, fontList, NULL);
 441
 442         /* TODO: why does this cause a crash in XtWidgetToApplicationContext?
 443         int i;
 444         for (i = 0; i < m_noStrings; i++)
 445             XtVaSetValues ((Widget) m_widgetList[i], XmNfontList, fontList, NULL);
 446         */
 447         GetSize(& width1, & height1);
 448         if (keepOriginalSize && (width != width1 || height != height1))
 449         {
 450             SetSize(-1, -1, width, height);
 451         }
 452     }
 453 }
 454
 455 void wxChoice::ChangeBackgroundColour()
 456 {
 457     DoChangeBackgroundColour(m_formWidget, m_backgroundColour);
 458     DoChangeBackgroundColour(m_buttonWidget, m_backgroundColour);
 459     DoChangeBackgroundColour(m_menuWidget, m_backgroundColour);
 460     int i;
 461     for (i = 0; i < m_noStrings; i++)
 462         DoChangeBackgroundColour(m_widgetList[i], m_backgroundColour);
 463 }
 464
 465 void wxChoice::ChangeForegroundColour()
 466 {
 467     DoChangeForegroundColour(m_formWidget, m_foregroundColour);
 468     DoChangeForegroundColour(m_buttonWidget, m_foregroundColour);
 469     DoChangeForegroundColour(m_menuWidget, m_foregroundColour);
 470     int i;
 471     for (i = 0; i < m_noStrings; i++)
 472         DoChangeForegroundColour(m_widgetList[i], m_foregroundColour);
 473 }