LegendHelper.cxx

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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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 * License, v. 2.0. If a copy of the MPL was not distributed with this
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 *
 * This file incorporates work covered by the following license notice:
 *
 *   Licensed to the Apache Software Foundation (ASF) under one or more
 *   contributor license agreements. See the NOTICE file distributed
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 *   ownership. The ASF licenses this file to you under the Apache
 *   License, Version 2.0 (the "License"); you may not use this file
 *   except in compliance with the License. You may obtain a copy of
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#include <LegendHelper.hxx>
#include <Legend.hxx>
#include <ChartModel.hxx>
#include <Diagram.hxx>
#include <com/sun/star/chart/ChartLegendExpansion.hpp>
#include <com/sun/star/chart2/LegendPosition.hpp>
#include <com/sun/star/chart2/RelativePosition.hpp>
#include <com/sun/star/uno/XComponentContext.hpp>
#include <comphelper/diagnose_ex.hxx>
 
using namespace ::com::sun::star;
using ::com::sun::star::uno::Reference;
 
namespace chart
{
 
rtl::Reference< Legend > LegendHelper::showLegend( ChartModel& rModel
                                                    , const uno::Reference< uno::XComponentContext >& xContext )
{
    rtl::Reference< Legend > xLegend = LegendHelper::getLegend( rModel, xContext, true );
    if( xLegend.is())
    {
        xLegend->setPropertyValue( "Show", uno::Any(true) );
 
        chart2::RelativePosition aRelativePosition;
        if( !(xLegend->getPropertyValue( "RelativePosition") >>=  aRelativePosition) )
        {
            chart2::LegendPosition ePos = chart2::LegendPosition_LINE_END;
            if( !(xLegend->getPropertyValue( "AnchorPosition") >>= ePos ) )
                xLegend->setPropertyValue( "AnchorPosition", uno::Any( ePos ));
 
            css::chart::ChartLegendExpansion eExpansion =
                    ( ePos == chart2::LegendPosition_LINE_END ||
                      ePos == chart2::LegendPosition_LINE_START )
                    ? css::chart::ChartLegendExpansion_HIGH
                    : css::chart::ChartLegendExpansion_WIDE;
            if( !(xLegend->getPropertyValue( "Expansion") >>= eExpansion ) )
                xLegend->setPropertyValue( "Expansion", uno::Any( eExpansion ));
 
            xLegend->setPropertyValue( "RelativePosition", uno::Any());
        }
 
    }
    return xLegend;
}
 
void LegendHelper::hideLegend( ChartModel& rModel )
{
    rtl::Reference< Legend > xLegend = LegendHelper::getLegend( rModel, nullptr );
    if( xLegend.is())
    {
        xLegend->setPropertyValue( "Show", uno::Any(false) );
    }
}
 
rtl::Reference< Legend > LegendHelper::getLegend(
      ChartModel& rModel
    , const uno::Reference< uno::XComponentContext >& xContext
    , bool bCreate )
{
    rtl::Reference< Legend > xResult;
 
    try
    {
        rtl::Reference< Diagram > xDia( rModel.getFirstChartDiagram());
        if( xDia.is() )
        {
            xResult = xDia->getLegend2();
            if( bCreate && !xResult.is() && xContext.is() )
            {
                xResult = new Legend();
                xDia->setLegend( xResult );
            }
        }
        else if(bCreate)
        {
            OSL_FAIL("need diagram for creation of legend");
        }
    }
    catch( const uno::Exception & )
    {
        DBG_UNHANDLED_EXCEPTION("chart2");
    }
 
    return xResult;
}
 
bool LegendHelper::hasLegend( const rtl::Reference< Diagram > & xDiagram )
{
    bool bReturn = false;
    if( xDiagram.is())
    {
        uno::Reference< beans::XPropertySet > xLegendProp( xDiagram->getLegend(), uno::UNO_QUERY );
        if( xLegendProp.is())
            xLegendProp->getPropertyValue( "Show") >>= bReturn;
    }
 
    return bReturn;
}
 
} //namespace chart
 
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