avoid setting initial position if it was not specified, broken in r70734

[wxWidgets.git] / src / osx / scrolbar_osx.cpp

/////////////////////////////////////////////////////////////////////////////
// Name:        src/osx/scrolbar_osx.cpp
// Purpose:     wxScrollBar
// Author:      Stefan Csomor
// Modified by:
// Created:     1998-01-01
// Copyright:   (c) Stefan Csomor
// Licence:       wxWindows licence
/////////////////////////////////////////////////////////////////////////////

#include "wx/wxprec.h"

#include "wx/scrolbar.h"

#ifndef WX_PRECOMP
    #include "wx/intl.h"
    #include "wx/log.h"
    #include "wx/settings.h"
#endif

#include "wx/osx/private.h"

#if wxUSE_SCROLLBAR

BEGIN_EVENT_TABLE(wxScrollBar, wxControl)
END_EVENT_TABLE()


bool wxScrollBar::Create( wxWindow *parent,
    wxWindowID id,
    const wxPoint& pos,
    const wxSize& size,
    long style,
    const wxValidator& validator,
    const wxString& name )
{    
    DontCreatePeer();
    
    if ( !wxControl::Create( parent, id, pos, size, style, validator, name ) )
        return false;

    SetPeer(wxWidgetImpl::CreateScrollBar( this, parent, id, pos, size, style, GetExtraStyle() ));

    MacPostControlCreate( pos, size );

    return true;
}

wxScrollBar::~wxScrollBar()
{
}

void wxScrollBar::SetThumbPosition( int viewStart )
{
    GetPeer()->SetScrollThumb( viewStart, m_viewSize );
}

int wxScrollBar::GetThumbPosition() const
{
    return GetPeer()->GetValue();
}

void wxScrollBar::SetScrollbar( int position,
                                int thumbSize,
                                int range,
                                int pageSize,
                                bool WXUNUSED(refresh) )
{
    m_pageSize = pageSize;
    m_viewSize = thumbSize;
    m_objectSize = range;

   int range1 = wxMax( (m_objectSize - m_viewSize), 0 );

   GetPeer()->SetMaximum( range1 );
   GetPeer()->SetScrollThumb( position, m_viewSize );
}

void wxScrollBar::Command( wxCommandEvent& event )
{
    SetThumbPosition( event.GetInt() );
    ProcessCommand( event );
}

bool wxScrollBar::OSXHandleClicked( double WXUNUSED(timestampsec) )
{
    int new_pos = GetPeer()->GetValue();

    wxScrollEvent event( wxEVT_SCROLL_THUMBRELEASE, m_windowId );
    if ( m_windowStyle & wxHORIZONTAL )
        event.SetOrientation( wxHORIZONTAL );
    else
        event.SetOrientation( wxVERTICAL );

    event.SetPosition( new_pos );
    event.SetEventObject( this );
    wxWindow* window = GetParent();
    if (window && window->MacIsWindowScrollbar( this ))
        // this is hardcoded
        window->MacOnScroll( event );
    else
        HandleWindowEvent( event );

    return true;
}


wxSize wxScrollBar::DoGetBestSize() const
{
    int w = 100;
    int h = 100;

    if ( IsVertical() )
    {
        w = wxSystemSettings::GetMetric(wxSYS_VSCROLL_X);
    }
    else
    {
        h = wxSystemSettings::GetMetric(wxSYS_HSCROLL_Y);
    }

    wxSize best(w, h);
    CacheBestSize(best);
    return best;
}

void wxScrollBar::TriggerScrollEvent( wxEventType scrollEvent )
{
    int position = GetPeer()->GetValue();
    int minPos = 0 ;
    int maxPos = GetPeer()->GetMaximum();
    int nScrollInc = 0;

    if ( scrollEvent == wxEVT_SCROLL_LINEUP )
    {
        nScrollInc = -1;
    }
    else if ( scrollEvent == wxEVT_SCROLL_LINEDOWN )
    {
        nScrollInc = 1;
    }
    else if ( scrollEvent == wxEVT_SCROLL_PAGEUP )
    {
        nScrollInc = -m_pageSize;
    }
    else if ( scrollEvent == wxEVT_SCROLL_PAGEDOWN )
    {
        nScrollInc = m_pageSize;
    }

    int new_pos = position + nScrollInc;

    if (new_pos < minPos)
        new_pos = minPos;
    else if (new_pos > maxPos)
        new_pos = maxPos;

    if ( nScrollInc )
        SetThumbPosition( new_pos );

    wxScrollEvent event( scrollEvent, m_windowId );
    if ( m_windowStyle & wxHORIZONTAL )
        event.SetOrientation( wxHORIZONTAL );
    else
        event.SetOrientation( wxVERTICAL );

    event.SetPosition( new_pos );
    event.SetEventObject( this );

    wxWindow* window = GetParent();
    if (window && window->MacIsWindowScrollbar( this ))
        // this is hardcoded
        window->MacOnScroll( event );
    else
        HandleWindowEvent( event );
}

#endif