Fixed core dump for when there is no image list on the TreeCtrl

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

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

// ============================================================================
// headers & declarations
// ============================================================================

#include "wx/menu.h"
#include "wx/menuitem.h"
#include "wx/utils.h"
#include "wx/frame.h"

#include <Xm/Label.h>
#include <Xm/LabelG.h>
#include <Xm/CascadeBG.h>
#include <Xm/CascadeB.h>
#include <Xm/SeparatoG.h>
#include <Xm/PushBG.h>
#include <Xm/ToggleB.h>
#include <Xm/ToggleBG.h>
#include <Xm/RowColumn.h>

#include "wx/motif/private.h"

void wxMenuItemCallback (Widget w, XtPointer clientData,
                         XtPointer ptr);
void wxMenuItemArmCallback (Widget w, XtPointer clientData,
                            XtPointer ptr);
void wxMenuItemDisarmCallback (Widget w, XtPointer clientData,
                               XtPointer ptr);

// ============================================================================
// implementation
// ============================================================================

// ----------------------------------------------------------------------------
// dynamic classes implementation
// ----------------------------------------------------------------------------

#if !USE_SHARED_LIBRARY
IMPLEMENT_DYNAMIC_CLASS(wxMenuItem, wxObject)
#endif  //USE_SHARED_LIBRARY

// ----------------------------------------------------------------------------
// wxMenuItem
// ----------------------------------------------------------------------------

// ctor & dtor
// -----------

wxMenuItem::wxMenuItem(wxMenu *pParentMenu, int id,
                       const wxString& strName, const wxString& strHelp,
                       bool bCheckable,
                       wxMenu *pSubMenu) :
m_strHelp(strHelp),
m_bCheckable(bCheckable),
m_strName(strName)
{
    wxASSERT( pParentMenu != NULL );
    
    m_pParentMenu = pParentMenu;
    m_pSubMenu    = pSubMenu;
    m_idItem      = id;
    m_bEnabled    = TRUE;
    m_bChecked    = FALSE;
    
    //// Motif-specific
    m_menuBar = NULL;
    m_buttonWidget = (WXWidget) NULL;
    m_topMenu = NULL;
}

wxMenuItem::~wxMenuItem() 
{
}

// misc
// ----

// delete the sub menu
void wxMenuItem::DeleteSubMenu()
{
    wxASSERT( m_pSubMenu != NULL );
    
    delete m_pSubMenu;
    m_pSubMenu = NULL;
}

// change item state
// -----------------

void wxMenuItem::Enable(bool bDoEnable)
{
    if ( m_bEnabled != bDoEnable )
    {
        if ( m_pSubMenu == NULL )
        {     // normal menu item
            if (m_buttonWidget)
                XtSetSensitive( (Widget) m_buttonWidget, (Boolean) bDoEnable);
        }
        else                            // submenu
        {
            // Maybe we should apply this to all items in the submenu?
            // Or perhaps it works anyway.
            if (m_buttonWidget)
                XtSetSensitive( (Widget) m_buttonWidget, (Boolean) bDoEnable);
        }
        
        m_bEnabled = bDoEnable;
    }
}

void wxMenuItem::Check(bool bDoCheck)
{
    wxCHECK_RET( IsCheckable(), "only checkable items may be checked" );
    
    if ( m_bChecked != bDoCheck )
    {
        if (m_buttonWidget && XtIsSubclass ((Widget) m_buttonWidget, xmToggleButtonGadgetClass))
        {
            XtVaSetValues ( (Widget) m_buttonWidget, XmNset, (Boolean) bDoCheck, NULL);
        }
        m_bChecked = bDoCheck;
    }
}

//// Motif-specific

void wxMenuItem::CreateItem (WXWidget menu, wxMenuBar * menuBar, wxMenu * topMenu)
{
    m_menuBar = menuBar;
    m_topMenu = topMenu;
    
    if (GetId() == -2)
    {
        // Id=-2 identifies a Title item.
        wxStripMenuCodes ((char*) (const char*) m_strName, wxBuffer);
        m_buttonWidget = (WXWidget) XtVaCreateManagedWidget (wxBuffer,
            xmLabelGadgetClass, (Widget) menu, NULL);
    }
    else if ((!m_strName.IsNull() && m_strName != "") && (!m_pSubMenu))
    {
        wxStripMenuCodes ((char*) (const char*) m_strName, wxBuffer);
        if (IsCheckable())
        {
            m_buttonWidget = (WXWidget) XtVaCreateManagedWidget (wxBuffer,
                xmToggleButtonGadgetClass, (Widget) menu,
                NULL);
            XtVaSetValues ((Widget) m_buttonWidget, XmNset, (Boolean) IsChecked(), NULL);
        }
        else
            m_buttonWidget = (WXWidget) XtVaCreateManagedWidget (wxBuffer,
            xmPushButtonGadgetClass, (Widget) menu,
            NULL);
        char mnem = wxFindMnemonic (m_strName);
        if (mnem != 0)
            XtVaSetValues ((Widget) m_buttonWidget, XmNmnemonic, mnem, NULL);
        
        //// TODO: proper accelerator treatment. What does wxFindAccelerator
        //// look for?
        strcpy(wxBuffer, (char*) (const char*) m_strName);
        char *accel = wxFindAccelerator (wxBuffer);
        if (accel)
            XtVaSetValues ((Widget) m_buttonWidget, XmNaccelerator, accel, NULL);
        
        // TODO: What does this do?
        strcpy(wxBuffer, (char*) (const char*) m_strName);
        XmString accel_str = wxFindAcceleratorText (wxBuffer);
        if (accel_str)
        {
            XtVaSetValues ((Widget) m_buttonWidget, XmNacceleratorText, accel_str, NULL);
            XmStringFree (accel_str);
        }
        
        if (IsCheckable())
            XtAddCallback ((Widget) m_buttonWidget,
            XmNvalueChangedCallback,
            (XtCallbackProc) wxMenuItemCallback,
            (XtPointer) this);
        else
            XtAddCallback ((Widget) m_buttonWidget,
            XmNactivateCallback,
            (XtCallbackProc) wxMenuItemCallback,
            (XtPointer) this);
        XtAddCallback ((Widget) m_buttonWidget,
            XmNarmCallback,
            (XtCallbackProc) wxMenuItemArmCallback,
            (XtPointer) this);
        XtAddCallback ((Widget) m_buttonWidget,
            XmNdisarmCallback,
            (XtCallbackProc) wxMenuItemDisarmCallback,
            (XtPointer) this);
    }
    else if (GetId() == -1)
    {
        m_buttonWidget = (WXWidget) XtVaCreateManagedWidget ("separator",
            xmSeparatorGadgetClass, (Widget) menu, NULL);
    }
    else if (m_pSubMenu)
    {
        m_buttonWidget = m_pSubMenu->CreateMenu (menuBar, menu, topMenu, m_strName, TRUE);
        m_pSubMenu->SetButtonWidget(m_buttonWidget);
        XtAddCallback ((Widget) m_buttonWidget,
            XmNcascadingCallback,
            (XtCallbackProc) wxMenuItemArmCallback,
            (XtPointer) this);
    }
    if (m_buttonWidget)
        XtSetSensitive ((Widget) m_buttonWidget, (Boolean) IsEnabled());
}

void wxMenuItem::DestroyItem(bool full)
{
    if (GetId() == -2)
    {
        ;			// Nothing
        
    }
    else if ((!m_strName.IsNull() && (m_strName != "")) && !m_pSubMenu)
    {
        if (m_buttonWidget)
        {
            if (IsCheckable())
                XtRemoveCallback ((Widget) m_buttonWidget, XmNvalueChangedCallback,
                wxMenuItemCallback, (XtPointer) this);
            else
                XtRemoveCallback ((Widget) m_buttonWidget, XmNactivateCallback,
                wxMenuItemCallback, (XtPointer) this);
            XtRemoveCallback ((Widget) m_buttonWidget, XmNarmCallback,
                wxMenuItemArmCallback, (XtPointer) this);
            XtRemoveCallback ((Widget) m_buttonWidget, XmNdisarmCallback,
                wxMenuItemDisarmCallback, (XtPointer) this);
        }
    }
    else if (GetId() == -1)
    {
        ;			// Nothing
        
    }
    else if (GetSubMenu())
    {
        if (m_buttonWidget)
        {
            XtRemoveCallback ((Widget) m_buttonWidget, XmNcascadingCallback,
                wxMenuItemArmCallback, (XtPointer) this);
        }
        m_pSubMenu->DestroyMenu(full);
        if (full)
            m_buttonWidget = NULL;
    }
    
    if (m_buttonWidget && full)
    {
        XtDestroyWidget ((Widget) m_buttonWidget);
        m_buttonWidget = (WXWidget) 0;
    }
}

void wxMenuItem::SetLabel(const wxString& label)
{
    char mnem = wxFindMnemonic (label);
    wxStripMenuCodes ((char*) (const char*) label, wxBuffer);
    
    m_strName = label;
    
    if (m_buttonWidget)
    {
        XmString label_str = XmStringCreateSimple (wxBuffer);
        XtVaSetValues ((Widget) m_buttonWidget,
            XmNlabelString, label_str,
            NULL);
        XmStringFree (label_str);
        if (mnem != 0)
            XtVaSetValues ((Widget) m_buttonWidget, XmNmnemonic, mnem, NULL);
        strcpy(wxBuffer, (char*) (const char*) label);
        char *accel = wxFindAccelerator (wxBuffer);
        if (accel)
            XtVaSetValues ((Widget) m_buttonWidget, XmNaccelerator, accel, NULL);
        
        strcpy(wxBuffer, (char*) (const char*) label);
        XmString accel_str = wxFindAcceleratorText (wxBuffer);
        if (accel_str)
        {
            XtVaSetValues ((Widget) m_buttonWidget, XmNacceleratorText, accel_str, NULL);
            XmStringFree (accel_str);
        }
    }
}

void wxMenuItemCallback (Widget w, XtPointer clientData,
                         XtPointer ptr)
{
    wxMenuItem *item = (wxMenuItem *) clientData;
    if (item)
    {
        if (item->IsCheckable())
        {
            Boolean isChecked = FALSE;
            XtVaGetValues ((Widget) item->GetButtonWidget(), XmNset, & isChecked, NULL);
            item->SetChecked(isChecked);
        }
        if (item->GetMenuBar() && item->GetMenuBar()->GetMenuBarFrame())
        {
            wxCommandEvent commandEvent(wxEVT_COMMAND_MENU_SELECTED, item->GetId());
            commandEvent.SetEventObject(item->GetMenuBar()->GetMenuBarFrame());
            commandEvent.SetInt( item->GetId() );
            
            item->GetMenuBar()->GetMenuBarFrame()->GetEventHandler()->ProcessEvent(commandEvent);
        }
        else if (item->GetTopMenu())
        {
            wxCommandEvent event (wxEVT_COMMAND_MENU_SELECTED, item->GetId());
            event.SetEventObject(item->GetTopMenu());
            event.SetInt( item->GetId() );
            
            item->GetTopMenu()->ProcessCommand (event);
        }
    }
}

void wxMenuItemArmCallback (Widget w, XtPointer clientData,
                       XtPointer ptr)
{
    wxMenuItem *item = (wxMenuItem *) clientData;
    if (item)
    {
        if (item->GetMenuBar() && item->GetMenuBar()->GetMenuBarFrame())
        {
            wxMenuEvent menuEvent(wxEVT_MENU_HIGHLIGHT, item->GetId());
            menuEvent.SetEventObject(item->GetMenuBar()->GetMenuBarFrame());
            
            item->GetMenuBar()->GetMenuBarFrame()->GetEventHandler()->ProcessEvent(menuEvent);
        }
    }
}

void 
wxMenuItemDisarmCallback (Widget w, XtPointer clientData,
                          XtPointer ptr)
{
    wxMenuItem *item = (wxMenuItem *) clientData;
    if (item)
    {
        if (item->GetMenuBar() && item->GetMenuBar()->GetMenuBarFrame())
        {
            // TODO: not sure this is correct, since -1 means something
            // special to event system
            wxMenuEvent menuEvent(wxEVT_MENU_HIGHLIGHT, -1);
            menuEvent.SetEventObject(item->GetMenuBar()->GetMenuBarFrame());
            
            item->GetMenuBar()->GetMenuBarFrame()->GetEventHandler()->ProcessEvent(menuEvent);
        }
    }
}