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_font = parent->GetFont();
  70
  71     Widget parentWidget = (Widget) parent->GetClientWidget();
  72
  73     m_formWidget = (WXWidget) XtVaCreateManagedWidget(name.c_str(),
  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     // JACS, 24/1/99: this seems to cause a malloc crash later on, e.g.
 123     // in controls sample.
 124     //
 125     // Widget optionLabel = XmOptionLabelGadget ((Widget) m_buttonWidget);
 126     // XtUnmanageChild (optionLabel);
 127 #endif
 128 #endif
 129
 130     XtVaSetValues((Widget) m_formWidget, XmNresizePolicy, XmRESIZE_NONE, NULL);
 131
 132     ChangeFont(FALSE);
 133
 134     AttachWidget (parent, m_buttonWidget, m_formWidget, pos.x, pos.y, size.x, size.y);
 135
 136     ChangeBackgroundColour();
 137
 138     return TRUE;
 139 }
 140
 141 wxChoice::~wxChoice()
 142 {
 143     // For some reason destroying the menuWidget
 144     // can cause crashes on some machines. It will
 145     // be deleted implicitly by deleting the parent form
 146     // anyway.
 147     //  XtDestroyWidget (menuWidget);
 148     if (m_widgetList)
 149         delete[] m_widgetList;
 150
 151     if (GetMainWidget())
 152     {
 153         DetachWidget(GetMainWidget()); // Removes event handlers
 154         DetachWidget(m_formWidget);
 155
 156         XtDestroyWidget((Widget) m_formWidget);
 157         m_formWidget = (WXWidget) 0;
 158
 159         // Presumably the other widgets have been deleted now, via the form
 160         m_mainWidget = (WXWidget) 0;
 161         m_buttonWidget = (WXWidget) 0;
 162     }
 163 }
 164
 165 void wxChoice::Append(const wxString& item)
 166 {
 167     Widget w = XtVaCreateManagedWidget (wxStripMenuCodes(item),
 168 #if USE_GADGETS
 169         xmPushButtonGadgetClass, (Widget) m_menuWidget,
 170 #else
 171         xmPushButtonWidgetClass, (Widget) m_menuWidget,
 172 #endif
 173         NULL);
 174
 175     DoChangeBackgroundColour((WXWidget) w, m_backgroundColour);
 176
 177     if (m_font.Ok())
 178         XtVaSetValues (w,
 179         XmNfontList, (XmFontList) m_font.GetFontList(1.0, XtDisplay((Widget) m_formWidget)),
 180         NULL);
 181
 182     WXWidget *new_widgetList = new WXWidget[m_noStrings + 1];
 183     int i;
 184     if (m_widgetList)
 185         for (i = 0; i < m_noStrings; i++)
 186             new_widgetList[i] = m_widgetList[i];
 187
 188         new_widgetList[m_noStrings] = (WXWidget) w;
 189
 190         if (m_widgetList)
 191             delete[] m_widgetList;
 192         m_widgetList = new_widgetList;
 193
 194         char mnem = wxFindMnemonic ((char*) (const char*) item);
 195         if (mnem != 0)
 196             XtVaSetValues (w, XmNmnemonic, mnem, NULL);
 197
 198         XtAddCallback (w, XmNactivateCallback, (XtCallbackProc) wxChoiceCallback, (XtPointer) this);
 199
 200         if (m_noStrings == 0 && m_buttonWidget)
 201         {
 202             XtVaSetValues ((Widget) m_buttonWidget, XmNmenuHistory, w, NULL);
 203             Widget label = XmOptionButtonGadget ((Widget) m_buttonWidget);
 204             XmString text = XmStringCreateSimple ((char*) (const char*) item);
 205             XtVaSetValues (label,
 206                 XmNlabelString, text,
 207                 NULL);
 208             XmStringFree (text);
 209         }
 210         wxNode *node = m_stringList.Add (item);
 211         XtVaSetValues (w, XmNuserData, node->Data (), NULL);
 212
 213         m_noStrings ++;
 214 }
 215
 216 void wxChoice::Delete(int WXUNUSED(n))
 217 {
 218     wxFAIL_MSG( "Sorry, wxChoice::Delete isn't implemented yet. Maybe you'd like to volunteer? :-)" );
 219
 220     // What should we do -- remove the callback for this button widget,
 221     // delete the m_stringList entry, delete the button widget, construct a new widget list
 222     // (see Append)
 223
 224     // TODO
 225     m_noStrings --;
 226 }
 227
 228 void wxChoice::Clear()
 229 {
 230     m_stringList.Clear ();
 231     int i;
 232     for (i = 0; i < m_noStrings; i++)
 233     {
 234         XtUnmanageChild ((Widget) m_widgetList[i]);
 235         XtDestroyWidget ((Widget) m_widgetList[i]);
 236     }
 237     if (m_noStrings)
 238         delete[] m_widgetList;
 239     m_widgetList = (WXWidget*) NULL;
 240     if (m_buttonWidget)
 241         XtVaSetValues ((Widget) m_buttonWidget, XmNmenuHistory, (Widget) NULL, NULL);
 242     m_noStrings = 0;
 243 }
 244
 245 int wxChoice::GetSelection() const
 246 {
 247     XmString text;
 248     char *s;
 249     Widget label = XmOptionButtonGadget ((Widget) m_buttonWidget);
 250     XtVaGetValues (label,
 251         XmNlabelString, &text,
 252         NULL);
 253
 254     if (XmStringGetLtoR (text, XmSTRING_DEFAULT_CHARSET, &s))
 255     {
 256         int i = 0;
 257         for (wxNode * node = m_stringList.First (); node; node = node->Next ())
 258         {
 259             char *s1 = (char *) node->Data ();
 260             if (s1 == s || strcmp (s1, s) == 0)
 261             {
 262                 XmStringFree(text) ;
 263                 XtFree (s);
 264                 return i;
 265             }
 266             else
 267                 i++;
 268         }            // for()
 269
 270         XmStringFree(text) ;
 271         XtFree (s);
 272         return -1;
 273     }
 274     XmStringFree(text) ;
 275     return -1;
 276 }
 277
 278 void wxChoice::SetSelection(int n)
 279 {
 280     m_inSetValue = TRUE;
 281
 282     wxNode *node = m_stringList.Nth (n);
 283     if (node)
 284     {
 285         Dimension selectionWidth, selectionHeight;
 286
 287         char *s = (char *) node->Data ();
 288         XmString text = XmStringCreateSimple (s);
 289         XtVaGetValues ((Widget) m_widgetList[n], XmNwidth, &selectionWidth, XmNheight, &selectionHeight, NULL);
 290         Widget label = XmOptionButtonGadget ((Widget) m_buttonWidget);
 291         XtVaSetValues (label,
 292             XmNlabelString, text,
 293             NULL);
 294         XmStringFree (text);
 295         XtVaSetValues ((Widget) m_buttonWidget,
 296             XmNwidth, selectionWidth, XmNheight, selectionHeight,
 297             XmNmenuHistory, (Widget) m_widgetList[n], NULL);
 298     }
 299     m_inSetValue = FALSE;
 300 }
 301
 302 int wxChoice::FindString(const wxString& s) const
 303 {
 304     int i = 0;
 305     for (wxNode * node = m_stringList.First (); node; node = node->Next ())
 306     {
 307         char *s1 = (char *) node->Data ();
 308         if (s == s1)
 309         {
 310             return i;
 311         }
 312         else
 313             i++;
 314     }
 315     return -1;
 316 }
 317
 318 wxString wxChoice::GetString(int n) const
 319 {
 320     wxNode *node = m_stringList.Nth (n);
 321     if (node)
 322         return wxString((char *) node->Data ());
 323     else
 324         return wxEmptyString;
 325 }
 326
 327 void wxChoice::SetColumns(int n)
 328 {
 329     if (n<1) n = 1 ;
 330
 331     short numColumns = n ;
 332     Arg args[3];
 333
 334     XtSetArg(args[0], XmNnumColumns, numColumns);
 335     XtSetArg(args[1], XmNpacking, XmPACK_COLUMN);
 336     XtSetValues((Widget) m_menuWidget,args,2) ;
 337 }
 338
 339 int wxChoice::GetColumns(void) const
 340 {
 341     short numColumns ;
 342
 343     XtVaGetValues((Widget) m_menuWidget,XmNnumColumns,&numColumns,NULL) ;
 344     return numColumns ;
 345 }
 346
 347 void wxChoice::SetFocus()
 348 {
 349     XmProcessTraversal(XtParent((Widget)m_mainWidget), XmTRAVERSE_CURRENT);
 350 }
 351
 352 void wxChoice::DoSetSize(int x, int y, int width, int height, int sizeFlags)
 353 {
 354     XtVaSetValues((Widget) m_formWidget, XmNresizePolicy, XmRESIZE_ANY, NULL);
 355     bool managed = XtIsManaged((Widget) m_formWidget);
 356
 357     if (managed)
 358         XtUnmanageChild ((Widget) m_formWidget);
 359
 360     int actualWidth = width, actualHeight = height;
 361
 362     if (width > -1)
 363     {
 364         int i;
 365         for (i = 0; i < m_noStrings; i++)
 366             XtVaSetValues ((Widget) m_widgetList[i], XmNwidth, actualWidth, NULL);
 367         XtVaSetValues ((Widget) m_buttonWidget, XmNwidth, actualWidth,
 368             NULL);
 369     }
 370     if (height > -1)
 371     {
 372         int i;
 373         for (i = 0; i < m_noStrings; i++)
 374             XtVaSetValues ((Widget) m_widgetList[i], XmNheight, actualHeight, NULL);
 375         XtVaSetValues ((Widget) m_buttonWidget, XmNheight, actualHeight,
 376             NULL);
 377     }
 378
 379     if (managed)
 380         XtManageChild ((Widget) m_formWidget);
 381     XtVaSetValues((Widget) m_formWidget, XmNresizePolicy, XmRESIZE_NONE, NULL);
 382
 383     wxControl::DoSetSize (x, y, width, height, sizeFlags);
 384 }
 385
 386 wxString wxChoice::GetStringSelection () const
 387 {
 388     int sel = GetSelection ();
 389     if (sel > -1)
 390         return wxString(this->GetString (sel));
 391     else
 392         return wxEmptyString;
 393 }
 394
 395 bool wxChoice::SetStringSelection (const wxString& s)
 396 {
 397     int sel = FindString (s);
 398     if (sel > -1)
 399     {
 400         SetSelection (sel);
 401         return TRUE;
 402     }
 403     else
 404         return FALSE;
 405 }
 406
 407 void wxChoice::Command(wxCommandEvent & event)
 408 {
 409     SetSelection (event.GetInt());
 410     ProcessCommand (event);
 411 }
 412
 413 void wxChoiceCallback (Widget w, XtPointer clientData, XtPointer WXUNUSED(ptr))
 414 {
 415     wxChoice *item = (wxChoice *) clientData;
 416     if (item)
 417     {
 418         if (item->InSetValue())
 419             return;
 420
 421         char *s = NULL;
 422         XtVaGetValues (w, XmNuserData, &s, NULL);
 423         if (s)
 424         {
 425             wxCommandEvent event (wxEVT_COMMAND_CHOICE_SELECTED, item->GetId());
 426             event.SetEventObject(item);
 427             event.m_commandInt = item->FindString (s);
 428             //            event.m_commandString = s;
 429             item->ProcessCommand (event);
 430         }
 431     }
 432 }
 433
 434 void wxChoice::ChangeFont(bool keepOriginalSize)
 435 {
 436     // Note that this causes the widget to be resized back
 437     // to its original size! We therefore have to set the size
 438     // back again. TODO: a better way in Motif?
 439     if (m_font.Ok())
 440     {
 441         int width, height, width1, height1;
 442         GetSize(& width, & height);
 443
 444         XmFontList fontList = (XmFontList) m_font.GetFontList(1.0, XtDisplay((Widget) m_mainWidget));
 445         XtVaSetValues ((Widget) m_mainWidget, XmNfontList, fontList, NULL);
 446         XtVaSetValues ((Widget) m_buttonWidget, XmNfontList, fontList, NULL);
 447
 448         /* TODO: why does this cause a crash in XtWidgetToApplicationContext?
 449         int i;
 450         for (i = 0; i < m_noStrings; i++)
 451         XtVaSetValues ((Widget) m_widgetList[i], XmNfontList, fontList, NULL);
 452         */
 453         GetSize(& width1, & height1);
 454         if (keepOriginalSize && (width != width1 || height != height1))
 455         {
 456             SetSize(-1, -1, width, height);
 457         }
 458     }
 459 }
 460
 461 void wxChoice::ChangeBackgroundColour()
 462 {
 463     DoChangeBackgroundColour(m_formWidget, m_backgroundColour);
 464     DoChangeBackgroundColour(m_buttonWidget, m_backgroundColour);
 465     DoChangeBackgroundColour(m_menuWidget, m_backgroundColour);
 466     int i;
 467     for (i = 0; i < m_noStrings; i++)
 468         DoChangeBackgroundColour(m_widgetList[i], m_backgroundColour);
 469 }
 470
 471 void wxChoice::ChangeForegroundColour()
 472 {
 473     DoChangeForegroundColour(m_formWidget, m_foregroundColour);
 474     DoChangeForegroundColour(m_buttonWidget, m_foregroundColour);
 475     DoChangeForegroundColour(m_menuWidget, m_foregroundColour);
 476     int i;
 477     for (i = 0; i < m_noStrings; i++)
 478         DoChangeForegroundColour(m_widgetList[i], m_foregroundColour);
 479 }