Added comments

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

diff --git a/src/motif/choice.cpp b/src/motif/choice.cpp
index 9ba26a3a032f80eb9a4cf7623348f5124f43de46..71981d44d2be7c6b5adde7f17eda235854e0fbd0 100644 (file)
--- a/src/motif/choice.cpp
+++ b/src/motif/choice.cpp
@@ -15,79 +15,372 @@
 
 // For compilers that support precompilation, includes "wx.h".
 #include "wx/choice.h"
 
 // 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
 
 
 #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;
+}
+

 bool wxChoice::Create(wxWindow *parent, wxWindowID id,
 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)
+                      const wxPoint& pos,
+                      const wxSize& size,
+                      int n, const wxString choices[],
+                      long style,
+                      const wxValidator& validator,
+                      const wxString& name)

 {
     SetName(name);
     SetValidator(validator);
 {
     SetName(name);
     SetValidator(validator);

-    m_noStrings = n;
+    m_noStrings = 0; // Starts off with none, incremented in Append

     m_windowStyle = style;
     m_windowStyle = style;

+    m_buttonWidget = (WXWidget) 0;
+    m_menuWidget = (WXWidget) 0;
+    m_widgetList = (WXWidget*) 0;
+    m_formWidget = (WXWidget) 0;

 
     if (parent) parent->AddChild(this);
 
     if ( id == -1 )
 
     if (parent) parent->AddChild(this);
 
     if ( id == -1 )

-       m_windowId = (int)NewControlId();
+        m_windowId = (int)NewControlId();

     else
     else

-       m_windowId = id;
+        m_windowId = id;
+
+    m_backgroundColour = parent->GetBackgroundColour();
+    m_foregroundColour = parent->GetForegroundColour();
+    m_font = parent->GetFont();
+
+    Widget parentWidget = (Widget) parent->GetClientWidget();
+
+    m_formWidget = (WXWidget) XtVaCreateManagedWidget(name.c_str(),
+        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
+    // JACS, 24/1/99: this seems to cause a malloc crash later on, e.g.
+    // in controls sample.
+    //
+    // Widget optionLabel = XmOptionLabelGadget ((Widget) m_buttonWidget);
+    // XtUnmanageChild (optionLabel);
+#endif
+#endif
+
+    XtVaSetValues((Widget) m_formWidget, XmNresizePolicy, XmRESIZE_NONE, NULL);
+
+    ChangeFont(FALSE);
+
+    AttachWidget (parent, m_buttonWidget, m_formWidget, pos.x, pos.y, size.x, size.y);
+
+    ChangeBackgroundColour();

 
 

-    // TODO: create choice control
-    return FALSE;
+    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;
+
+    if (GetMainWidget())
+    {
+        DetachWidget(GetMainWidget()); // Removes event handlers
+        DetachWidget(m_formWidget);
+
+        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)
 {
 }
 
 void wxChoice::Append(const wxString& item)
 {

-    // TODO
-    m_noStrings ++;
+    Widget w = XtVaCreateManagedWidget (wxStripMenuCodes(item),
+#if USE_GADGETS
+        xmPushButtonGadgetClass, (Widget) m_menuWidget,
+#else
+        xmPushButtonWidgetClass, (Widget) m_menuWidget,
+#endif
+        NULL);
+
+    DoChangeBackgroundColour((WXWidget) w, m_backgroundColour);
+
+    if (m_font.Ok())
+        XtVaSetValues (w,
+        XmNfontList, (XmFontList) m_font.GetFontList(1.0, XtDisplay((Widget) m_formWidget)),
+        NULL);
+
+    WXWidget *new_widgetList = new WXWidget[m_noStrings + 1];
+    int i;
+    if (m_widgetList)
+        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)
+void wxChoice::Delete(int WXUNUSED(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()
 {
     // TODO
     m_noStrings --;
 }
 
 void wxChoice::Clear()
 {

-    // TODO
+    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
 {
     m_noStrings = 0;
 }
 
 int wxChoice::GetSelection() const
 {

-    // TODO
-    return 0;
+    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)
 {
 }
 
 void wxChoice::SetSelection(int n)
 {

-    // TODO
+    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 wxChoice::FindString(const wxString& s) const
 {

-    // TODO
-    return 0;
+    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
 {
 }
 
 wxString wxChoice::GetString(int n) const
 {

-    // TODO
-    return wxString("");
+    wxNode *node = m_stringList.Nth (n);
+    if (node)
+        return wxString((char *) node->Data ());
+    else
+        return wxEmptyString;

 }
 
 }
 

-void wxChoice::SetSize(int x, int y, int width, int height, int sizeFlags)
+void wxChoice::SetColumns(int n)

 {
 {

-    // TODO
+    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::DoSetSize(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::DoSetSize (x, y, width, height, sizeFlags);

 }
 
 wxString wxChoice::GetStringSelection () const
 }
 
 wxString wxChoice::GetStringSelection () const


@@ -96,17 +389,17 @@ wxString wxChoice::GetStringSelection () const
     if (sel > -1)
         return wxString(this->GetString (sel));
     else
     if (sel > -1)
         return wxString(this->GetString (sel));
     else

-        return wxString("");
+        return wxEmptyString;

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

-        {
-            SetSelection (sel);
-            return TRUE;
-        }
+    {
+        SetSelection (sel);
+        return TRUE;
+    }

     else
         return FALSE;
 }
     else
         return FALSE;
 }


@@ -117,3 +410,70 @@ void wxChoice::Command(wxCommandEvent & event)
     ProcessCommand (event);
 }
 
     ProcessCommand (event);
 }
 

+void wxChoiceCallback (Widget w, XtPointer clientData, XtPointer WXUNUSED(ptr))
+{
+    wxChoice *item = (wxChoice *) clientData;
+    if (item)
+    {
+        if (item->InSetValue())
+            return;
+
+        char *s = NULL;
+        XtVaGetValues (w, XmNuserData, &s, NULL);
+        if (s)
+        {
+            wxCommandEvent event (wxEVT_COMMAND_CHOICE_SELECTED, item->GetId());
+            event.SetEventObject(item);
+            event.m_commandInt = item->FindString (s);
+            //            event.m_commandString = s;
+            item->ProcessCommand (event);
+        }
+    }
+}
+
+void wxChoice::ChangeFont(bool keepOriginalSize)
+{
+    // Note that this causes the widget to be resized back
+    // to its original size! We therefore have to set the size
+    // back again. TODO: a better way in Motif?
+    if (m_font.Ok())
+    {
+        int width, height, width1, height1;
+        GetSize(& width, & height);
+
+        XmFontList fontList = (XmFontList) m_font.GetFontList(1.0, XtDisplay((Widget) m_mainWidget));
+        XtVaSetValues ((Widget) m_mainWidget, XmNfontList, fontList, NULL);
+        XtVaSetValues ((Widget) m_buttonWidget, XmNfontList, fontList, NULL);
+
+        /* TODO: why does this cause a crash in XtWidgetToApplicationContext?
+        int i;
+        for (i = 0; i < m_noStrings; i++)
+        XtVaSetValues ((Widget) m_widgetList[i], XmNfontList, fontList, NULL);
+        */
+        GetSize(& width1, & height1);
+        if (keepOriginalSize && (width != width1 || height != height1))
+        {
+            SetSize(-1, -1, width, height);
+        }
+    }
+}
+
+void wxChoice::ChangeBackgroundColour()
+{
+    DoChangeBackgroundColour(m_formWidget, m_backgroundColour);
+    DoChangeBackgroundColour(m_buttonWidget, m_backgroundColour);
+    DoChangeBackgroundColour(m_menuWidget, m_backgroundColour);
+    int i;
+    for (i = 0; i < m_noStrings; i++)
+        DoChangeBackgroundColour(m_widgetList[i], m_backgroundColour);
+}
+
+void wxChoice::ChangeForegroundColour()
+{
+    DoChangeForegroundColour(m_formWidget, m_foregroundColour);
+    DoChangeForegroundColour(m_buttonWidget, m_foregroundColour);
+    DoChangeForegroundColour(m_menuWidget, m_foregroundColour);
+    int i;
+    for (i = 0; i < m_noStrings; i++)
+        DoChangeForegroundColour(m_widgetList[i], m_foregroundColour);
+}