Quelle  waitsymbol.cxx   Sprache: C

/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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#include <canvas/canvastools.hxx>

#include <cppcanvas/customsprite.hxx>

#include <basegfx/point/b2dpoint.hxx>
#include <basegfx/vector/b2dsize.hxx>
#include <basegfx/vector/b2dvector.hxx>

#include <com/sun/star/rendering/XCanvas.hpp>
#include <com/sun/star/presentation/XSlideShowView.hpp>
#include <comphelper/diagnose_ex.hxx>

#include "waitsymbol.hxx"
#include <eventmultiplexer.hxx>

#include <algorithm>
#include <utility>


using namespace com::sun::star;

namespace slideshow::internal {

const sal_Int32 LEFT_BORDER_SPACE  = 10;
const sal_Int32 LOWER_BORDER_SPACE = 10;

WaitSymbolSharedPtr WaitSymbol::create( const uno::Reference<rendering::XBitmap>& xBitmap,
                                        ScreenUpdater&                            rScreenUpdater,
                                        EventMultiplexer&                         rEventMultiplexer,
                                        const UnoViewContainer&                   rViewContainer )
{
    WaitSymbolSharedPtr pRet(
        new WaitSymbol( xBitmap,
                        rScreenUpdater,
                        rViewContainer ));

    rEventMultiplexer.addViewHandler( pRet );

    return pRet;
}

WaitSymbol::WaitSymbol( uno::Reference<rendering::XBitmap>           xBitmap,
                        ScreenUpdater&                               rScreenUpdater,
                        const UnoViewContainer&                      rViewContainer ) :
    mxBitmap(std::move(xBitmap)),
    maViews(),
    mrScreenUpdater( rScreenUpdater ),
    mbVisible(false)
{
    for( const auto& pView : rViewContainer )
        viewAdded( pView );
}

void WaitSymbol::setVisible( const bool bVisible )
{
    if( mbVisible == bVisible )
        return;

    mbVisible = bVisible;

    for( const auto& rView : maViews )
    {
        if( rView.second )
        {
            if( bVisible )
                rView.second->show();
            else
                rView.second->hide();
        }
    }

    // sprites changed, need a screen update for this frame.
    mrScreenUpdater.requestImmediateUpdate();
}

basegfx::B2DPoint WaitSymbol::calcSpritePos(
    UnoViewSharedPtr const & rView ) const
{
    const awt::Rectangle aViewArea( rView->getUnoView()->getCanvasArea() );
    return basegfx::B2DPoint(
        aViewArea.X + std::min<sal_Int32>( aViewArea.Width, LEFT_BORDER_SPACE ),
        aViewArea.X + std::max<sal_Int32>( 0,
                                           aViewArea.Height
                                            - mxBitmap->getSize().Height
                                            - LOWER_BORDER_SPACE ) );
}

void WaitSymbol::viewAdded( const UnoViewSharedPtr& rView )
{
    cppcanvas::CustomSpriteSharedPtr sprite;

    try
    {
        const geometry::IntegerSize2D spriteSize( mxBitmap->getSize() );
        sprite = rView->createSprite( basegfx::B2DSize( spriteSize.Width,
                                                          spriteSize.Height ),
                                      1000.0 ); // sprite should be in front of all
                                                // other sprites
        rendering::ViewState viewState;
        canvas::tools::initViewState( viewState );
        rendering::RenderState renderState;
        canvas::tools::initRenderState( renderState );
        sprite->getContentCanvas()->getUNOCanvas()->drawBitmap(
            mxBitmap, viewState, renderState );

        sprite->setAlpha( 0.9 );
        sprite->movePixel( calcSpritePos( rView ) );
        if( mbVisible )
            sprite->show();
    }
    catch( uno::Exception& )
    {
        TOOLS_WARN_EXCEPTION( "slideshow", "" );
    }

    maViews.emplace_back( rView, sprite );
}

void WaitSymbol::viewRemoved( const UnoViewSharedPtr& rView )
{
    std::erase_if(
            maViews,
            [&rView]
            ( const ViewsVecT::value_type& cp )
            { return rView == cp.first; } );
}

void WaitSymbol::viewChanged( const UnoViewSharedPtr& rView )
{
    // find entry corresponding to modified view
    ViewsVecT::iterator aModifiedEntry(
        std::find_if(
            maViews.begin(),
            maViews.end(),
            [&rView]
            ( const ViewsVecT::value_type& cp )
            { return rView == cp.first; } ) );

    OSL_ASSERT( aModifiedEntry != maViews.end() );
    if( aModifiedEntry == maViews.end() )
        return;

    if( aModifiedEntry->second )
        aModifiedEntry->second->movePixel(
            calcSpritePos(aModifiedEntry->first) );
}

void WaitSymbol::viewsChanged()
{
    // reposition sprites on all views
    for( const auto& rView : maViews )
    {
        if( rView.second )
            rView.second->movePixel(
                calcSpritePos( rView.first ) );
    }
}

} // namespace slideshow::internal

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