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[wxWidgets.git] / src / motif / choice.cpp

/////////////////////////////////////////////////////////////////////////////
// Name:        choice.cpp
// Purpose:     wxChoice
// Author:      Julian Smart
// Modified by:
// Created:     17/09/98
// RCS-ID:      $Id$
// Copyright:   (c) Julian Smart
// Licence:   	wxWindows licence
/////////////////////////////////////////////////////////////////////////////

#ifdef __GNUG__
#pragma implementation "choice.h"
#endif

// For compilers that support precompilation, includes "wx.h".
#include "wx/choice.h"
#include "wx/utils.h"

#include <Xm/Xm.h>
#include <Xm/PushBG.h>
#include <Xm/PushB.h>
#include <Xm/RowColumn.h>

#include "wx/motif/private.h"

#if !USE_SHARED_LIBRARY
IMPLEMENT_DYNAMIC_CLASS(wxChoice, wxControl)
#endif

void wxChoiceCallback (Widget w, XtPointer clientData,
		  XtPointer ptr);

wxChoice::wxChoice()
{
    m_noStrings = 0;
    m_buttonWidget = (WXWidget) 0;
    m_menuWidget = (WXWidget) 0;
    m_widgetList = (WXWidget*) 0;
    m_formWidget = (WXWidget) 0;
    m_inSetValue = FALSE;
}

bool wxChoice::Create(wxWindow *parent, wxWindowID id,
           const wxPoint& pos,
           const wxSize& size,
		   int n, const wxString choices[],
		   long style,
           const wxValidator& validator,
           const wxString& name)
{
    SetName(name);
    SetValidator(validator);
    m_noStrings = n;
    m_windowStyle = style;
    m_buttonWidget = (WXWidget) 0;
    m_menuWidget = (WXWidget) 0;
    m_widgetList = (WXWidget*) 0;
    m_formWidget = (WXWidget) 0;
    m_inSetValue = FALSE;

    if (parent) parent->AddChild(this);

    if ( id == -1 )
    	m_windowId = (int)NewControlId();
    else
	    m_windowId = id;

    Widget parentWidget = (Widget) parent->GetClientWidget();

    m_formWidget = (WXWidget) XtVaCreateManagedWidget ((char*) (const char*) name,
					xmRowColumnWidgetClass, parentWidget,
					XmNmarginHeight, 0,
					XmNmarginWidth, 0,
					XmNpacking, XmPACK_TIGHT,
					XmNorientation, XmHORIZONTAL,
					NULL);

    XtVaSetValues ((Widget) m_formWidget, XmNspacing, 0, NULL);

   /*
    * Create the popup menu
    */
    m_menuWidget = (WXWidget) XmCreatePulldownMenu ((Widget) m_formWidget, "choiceMenu", NULL, 0);

    int i;
    if (n > 0)
    {
        int i;
        for (i = 0; i < n; i++)
            Append (choices[i]);
    }

   /*
    * Create button
    */
    Arg args[10];
    Cardinal argcnt = 0;

    XtSetArg (args[argcnt], XmNsubMenuId, (Widget) m_menuWidget);
    argcnt++;
    XtSetArg (args[argcnt], XmNmarginWidth, 0);
    argcnt++;
    XtSetArg (args[argcnt], XmNmarginHeight, 0);
    argcnt++;
    XtSetArg (args[argcnt], XmNpacking, XmPACK_TIGHT);
    argcnt++;
    m_buttonWidget = (WXWidget) XmCreateOptionMenu ((Widget) m_formWidget, "choiceButton", args, argcnt);

    m_mainWidget = m_buttonWidget;

    XtManageChild ((Widget) m_buttonWidget);

    // New code from Roland Haenel (roland_haenel@ac.cybercity.de)
    // Some time ago, I reported a problem with wxChoice-items under
    // Linux and Motif 2.0 (they caused sporadic GPFs). Now it seems
    // that I have found the code responsible for this behaviour.
#if XmVersion >= 1002
#if XmVersion <  2000
    Widget optionLabel = XmOptionLabelGadget ((Widget) m_buttonWidget);
    XtUnmanageChild (optionLabel);
#endif
#endif

    XtVaSetValues((Widget) m_formWidget, XmNresizePolicy, XmRESIZE_NONE, NULL);

    AttachWidget (parent, m_buttonWidget, m_formWidget, pos.x, pos.y, size.x, size.y);

    SetFont(* parent->GetFont());
    ChangeColour(m_mainWidget);

    return TRUE;
}

wxChoice::~wxChoice()
{
  // For some reason destroying the menuWidget
  // can cause crashes on some machines. It will
  // be deleted implicitly by deleting the parent form
  // anyway.
//  XtDestroyWidget (menuWidget);
    if (m_widgetList)
        delete[] m_widgetList;

    DetachWidget(GetMainWidget()); // Removes event handlers

    XtDestroyWidget((Widget) m_formWidget);
    m_formWidget = (WXWidget) 0;

    // Presumably the other widgets have been deleted now, via the form
    m_mainWidget = (WXWidget) 0;
    m_buttonWidget = (WXWidget) 0;
}

void wxChoice::Append(const wxString& item)
{
  wxStripMenuCodes ((char *)(const char *)item, wxBuffer);
  Widget w = XtVaCreateManagedWidget (wxBuffer,
#if USE_GADGETS
				      xmPushButtonGadgetClass, (Widget) m_menuWidget,
#else
				      xmPushButtonWidgetClass, (Widget) m_menuWidget,
#endif
				      NULL);

  if (m_windowFont.Ok())
    XtVaSetValues (w,
		   XmNfontList, (XmFontList) m_windowFont.GetFontList(1.0, XtDisplay((Widget) m_formWidget)),
		   NULL);

  WXWidget *new_widgetList = new WXWidget[m_noStrings + 1];
  int i;
  for (i = 0; i < m_noStrings; i++)
    new_widgetList[i] = m_widgetList[i];
  new_widgetList[m_noStrings] = (WXWidget) w;
  if (m_widgetList)
    delete[] m_widgetList;
  m_widgetList = new_widgetList;

  char mnem = wxFindMnemonic ((char*) (const char*) item);
  if (mnem != 0)
    XtVaSetValues (w, XmNmnemonic, mnem, NULL);

  XtAddCallback (w, XmNactivateCallback, (XtCallbackProc) wxChoiceCallback, (XtPointer) this);

  if (m_noStrings == 0 && m_buttonWidget)
    {
      XtVaSetValues ((Widget) m_buttonWidget, XmNmenuHistory, w, NULL);
      Widget label = XmOptionButtonGadget ((Widget) m_buttonWidget);
      XmString text = XmStringCreateSimple ((char*) (const char*) item);
      XtVaSetValues (label,
		     XmNlabelString, text,
		     NULL);
      XmStringFree (text);
    }
  wxNode *node = m_stringList.Add (item);
  XtVaSetValues (w, XmNuserData, node->Data (), NULL);

  m_noStrings ++;
}

void wxChoice::Delete(int n)
{
    wxFAIL_MSG( "Sorry, wxChoice::Delete isn't implemented yet. Maybe you'd like to volunteer? :-)" );

    // What should we do -- remove the callback for this button widget,
    // delete the m_stringList entry, delete the button widget, construct a new widget list
    // (see Append)

    // TODO
    m_noStrings --;
}

void wxChoice::Clear()
{
    m_stringList.Clear ();
    int i;
    for (i = 0; i < m_noStrings; i++)
    {
        XtUnmanageChild ((Widget) m_widgetList[i]);
        XtDestroyWidget ((Widget) m_widgetList[i]);
    }
    if (m_noStrings)
        delete[] m_widgetList;
    m_widgetList = (WXWidget*) NULL;
    if (m_buttonWidget)
        XtVaSetValues ((Widget) m_buttonWidget, XmNmenuHistory, (Widget) NULL, NULL);
    m_noStrings = 0;
}

int wxChoice::GetSelection() const
{
  XmString text;
  char *s;
  Widget label = XmOptionButtonGadget ((Widget) m_buttonWidget);
  XtVaGetValues (label,
         XmNlabelString, &text,
         NULL);

  if (XmStringGetLtoR (text, XmSTRING_DEFAULT_CHARSET, &s))
  {
      int i = 0;
      for (wxNode * node = m_stringList.First (); node; node = node->Next ())
      {
        char *s1 = (char *) node->Data ();
        if (s1 == s || strcmp (s1, s) == 0)
        {
          XmStringFree(text) ;
          XtFree (s);
          return i;
        }
        else
            i++;
      }            // for()

      XmStringFree(text) ;
      XtFree (s);
      return -1;
  }
  XmStringFree(text) ;
  return -1;
}

void wxChoice::SetSelection(int n)
{
  m_inSetValue = TRUE;
  
  wxNode *node = m_stringList.Nth (n);
  if (node)
    {
      Dimension selectionWidth, selectionHeight;

      char *s = (char *) node->Data ();
      XmString text = XmStringCreateSimple (s);
      XtVaGetValues ((Widget) m_widgetList[n], XmNwidth, &selectionWidth, XmNheight, &selectionHeight, NULL);
      Widget label = XmOptionButtonGadget ((Widget) m_buttonWidget);
      XtVaSetValues (label,
                     XmNlabelString, text,
                     NULL);
      XmStringFree (text);
      XtVaSetValues ((Widget) m_buttonWidget,
                     XmNwidth, selectionWidth, XmNheight, selectionHeight,
                     XmNmenuHistory, (Widget) m_widgetList[n], NULL);
    }
  m_inSetValue = FALSE;
}

int wxChoice::FindString(const wxString& s) const
{
    int i = 0;
    for (wxNode * node = m_stringList.First (); node; node = node->Next ())
    {
        char *s1 = (char *) node->Data ();
        if (s == s1)
        {
            return i;
        }
        else
            i++;
    }
    return -1;
}

wxString wxChoice::GetString(int n) const
{
  wxNode *node = m_stringList.Nth (n);
  if (node)
    return wxString((char *) node->Data ());
  else
    return wxEmptyString;
}

void wxChoice::SetColumns(int n)
{
  if (n<1) n = 1 ;

  short numColumns = n ;
  Arg args[3];

  XtSetArg(args[0], XmNnumColumns, numColumns);
  XtSetArg(args[1], XmNpacking, XmPACK_COLUMN);
  XtSetValues((Widget) m_menuWidget,args,2) ;
}

int wxChoice::GetColumns(void) const
{
  short numColumns ;

  XtVaGetValues((Widget) m_menuWidget,XmNnumColumns,&numColumns,NULL) ;
  return numColumns ;
}

void wxChoice::SetFocus()
{
  XmProcessTraversal(XtParent((Widget)m_mainWidget), XmTRAVERSE_CURRENT);
}

void wxChoice::SetSize(int x, int y, int width, int height, int sizeFlags)
{
    XtVaSetValues((Widget) m_formWidget, XmNresizePolicy, XmRESIZE_ANY, NULL);
    bool managed = XtIsManaged((Widget) m_formWidget);

    if (managed)
        XtUnmanageChild ((Widget) m_formWidget);

    int actualWidth = width, actualHeight = height;

    if (width > -1)
    {
        int i;
        for (i = 0; i < m_noStrings; i++)
            XtVaSetValues ((Widget) m_widgetList[i], XmNwidth, actualWidth, NULL);
        XtVaSetValues ((Widget) m_buttonWidget, XmNwidth, actualWidth,
             NULL);
    }
    if (height > -1)
    {
        int i;
        for (i = 0; i < m_noStrings; i++)
            XtVaSetValues ((Widget) m_widgetList[i], XmNheight, actualHeight, NULL);
        XtVaSetValues ((Widget) m_buttonWidget, XmNheight, actualHeight,
             NULL);
    }

    if (managed)
        XtManageChild ((Widget) m_formWidget);
    XtVaSetValues((Widget) m_formWidget, XmNresizePolicy, XmRESIZE_NONE, NULL);

    wxControl::SetSize (x, y, width, height, sizeFlags);
}

wxString wxChoice::GetStringSelection () const
{
    int sel = GetSelection ();
    if (sel > -1)
        return wxString(this->GetString (sel));
    else
        return wxEmptyString;
}

bool wxChoice::SetStringSelection (const wxString& s)
{
    int sel = FindString (s);
    if (sel > -1)
        {
            SetSelection (sel);
            return TRUE;
        }
    else
        return FALSE;
}

void wxChoice::Command(wxCommandEvent & event)
{
    SetSelection (event.GetInt());
    ProcessCommand (event);
}

void wxChoiceCallback (Widget w, XtPointer clientData,
          XtPointer ptr)
{
    wxChoice *item = (wxChoice *) clientData;
    if (item)
    {
        if (item->m_inSetValue)
            return;
        
        char *s = NULL;
        XtVaGetValues (w, XmNuserData, &s, NULL);
        if (s)
        {
            wxCommandEvent event (wxEVT_COMMAND_CHOICE_SELECTED);
            event.m_commandInt = item->FindString (s);
//            event.m_commandString = s;
            item->ProcessCommand (event);
        }
    }
}