slideoverlaybutton.cxx

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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4; fill-column: 100 -*- */
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#include <sal/config.h>
 
#include <eventmultiplexer.hxx>
#include "slideoverlaybutton.hxx"
 
#include <canvas/canvastools.hxx>
#include <cppcanvas/customsprite.hxx>
#include <basegfx/vector/b2dvector.hxx>
#include <comphelper/diagnose_ex.hxx>
 
#include <com/sun/star/presentation/XSlideShowView.hpp>
#include <com/sun/star/rendering/XCanvas.hpp>
 
#include <algorithm>
#include <utility>
 
namespace slideshow::internal
{
SlideOverlayButtonSharedPtr SlideOverlayButton::create(
    const css::uno::Reference<css::rendering::XBitmap>& xIconBitmap, css::awt::Point pPosition,
    std::function<void(basegfx::B2DPoint)> clickHandler, ScreenUpdater& rScreenUpdater,
    EventMultiplexer& rEventMultiplexer, const UnoViewContainer& rViewContainer)
{
    SlideOverlayButtonSharedPtr pRet(new SlideOverlayButton(
        xIconBitmap, pPosition, clickHandler, rScreenUpdater, rEventMultiplexer, rViewContainer));
 
    rEventMultiplexer.addViewHandler(pRet);
    // Set priority to 1000 so that the handler fires before the click handler on the slide
    rEventMultiplexer.addClickHandler(pRet, 1000);
    return pRet;
}
 
SlideOverlayButton::SlideOverlayButton(css::uno::Reference<css::rendering::XBitmap> xIconBitmap,
                                       css::awt::Point pPosition,
                                       std::function<void(basegfx::B2DPoint)> clickHandler,
                                       ScreenUpdater& rScreenUpdater,
                                       EventMultiplexer& rEventMultiplexer,
                                       const UnoViewContainer& rViewContainer)
    : mxIconBitmap(std::move(xIconBitmap))
    , mrEventMultiplexer(rEventMultiplexer)
    , mpPosition(pPosition)
    , mClickHandler(clickHandler)
    , mrScreenUpdater(rScreenUpdater)
{
    for (const auto& pView : rViewContainer)
        viewAdded(pView);
}
 
void SlideOverlayButton::setVisible(const bool bVisible)
{
    if (mbVisible == bVisible)
        return;
 
    mbVisible = bVisible;
 
    for (const auto& rView : maViews)
        if (rView.second)
            rView.second->show();
 
    // sprites changed, need a screen update for this frame.
    mrScreenUpdater.requestImmediateUpdate();
}
 
css::geometry::IntegerSize2D SlideOverlayButton::getSize() const { return mxIconBitmap->getSize(); }
 
basegfx::B2DPoint SlideOverlayButton::calcSpritePos(UnoViewSharedPtr const& rView) const
{
    const css::awt::Rectangle aViewArea(rView->getUnoView()->getCanvasArea());
    return basegfx::B2DPoint(
        aViewArea.X + std::min(aViewArea.Width, mpPosition.X),
        aViewArea.Y
            + std::max(sal_Int32(0),
                       aViewArea.Height - mxIconBitmap->getSize().Height - mpPosition.Y));
}
 
void SlideOverlayButton::viewAdded(const UnoViewSharedPtr& rView)
{
    cppcanvas::CustomSpriteSharedPtr sprite;
 
    try
    {
        const css::geometry::IntegerSize2D spriteSize(mxIconBitmap->getSize());
        sprite = rView->createSprite(basegfx::B2DSize(spriteSize.Width, spriteSize.Height),
                                     1000.0); // sprite should be in front of all
        // other sprites
        css::rendering::ViewState viewState;
        canvas::tools::initViewState(viewState);
        css::rendering::RenderState renderState;
        canvas::tools::initRenderState(renderState);
        sprite->getContentCanvas()->getUNOCanvas()->drawBitmap(mxIconBitmap, viewState,
                                                               renderState);
 
        sprite->setAlpha(0.9);
        sprite->movePixel(calcSpritePos(rView));
        sprite->show();
    }
    catch (css::uno::Exception&)
    {
        TOOLS_WARN_EXCEPTION("slideshow", "");
    }
 
    maViews.emplace_back(rView, sprite);
}
 
void SlideOverlayButton::viewRemoved(const UnoViewSharedPtr& rView)
{
    maViews.erase(
        std::remove_if(maViews.begin(), maViews.end(),
                       [&rView](const ViewsVecT::value_type& cp) { return rView == cp.first; }),
        maViews.end());
}
 
void SlideOverlayButton::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; }));
 
    assert(aModifiedEntry != maViews.end());
    if (aModifiedEntry == maViews.end())
        return;
 
    if (aModifiedEntry->second)
        aModifiedEntry->second->movePixel(calcSpritePos(aModifiedEntry->first));
}
 
void SlideOverlayButton::viewsChanged()
{
    // reposition sprites on all views
    for (const auto& rView : maViews)
    {
        if (rView.second)
            rView.second->movePixel(calcSpritePos(rView.first));
    }
}
 
bool SlideOverlayButton::handleMousePressed(const css::awt::MouseEvent& /*e*/) { return false; }
 
bool SlideOverlayButton::handleMouseReleased(const css::awt::MouseEvent& e)
{
    css::uno::Reference<css::presentation::XSlideShowView> view(e.Source,
                                                                css::uno::UNO_QUERY_THROW);
    const basegfx::B2DPoint btnPnt(
        view->getCanvasArea().X + std::min(view->getCanvasArea().Width, mpPosition.X),
        view->getCanvasArea().Y
            + std::max(sal_Int32(0), view->getCanvasArea().Height - mxIconBitmap->getSize().Height
                                         - mpPosition.Y));
    const basegfx::B2DPoint clickPnt
        = mrEventMultiplexer.toNormalPoint(e.Source, basegfx::B2DPoint(e.X, e.Y));
    if (clickPnt.getX() > btnPnt.getX()
        && clickPnt.getX() < btnPnt.getX() + mxIconBitmap->getSize().Width
        && clickPnt.getY() > btnPnt.getY()
        && clickPnt.getY() < btnPnt.getY() + mxIconBitmap->getSize().Height)
    {
        mClickHandler(clickPnt);
        return true;
    }
    return false;
}
 
bool SlideOverlayButton::handleMouseDragged(const css::awt::MouseEvent& /*e*/) { return false; }
 
bool SlideOverlayButton::handleMouseMoved(const css::awt::MouseEvent& /*e*/) { return false; }
 
} // namespace slideshow::internal
 
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