slideshow/source/engine/slideoverlaybutton.cxx

   1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4; fill-column: 100 -*- */
   2 /*
   3  * This file is part of the LibreOffice project.
   4  *
   5  * This Source Code Form is subject to the terms of the Mozilla Public
   6  * License, v. 2.0. If a copy of the MPL was not distributed with this
   7  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
   8  *
   9  * This file incorporates work covered by the following license notice:
  10  *
  11  *   Licensed to the Apache Software Foundation (ASF) under one or more
  12  *   contributor license agreements. See the NOTICE file distributed
  13  *   with this work for additional information regarding copyright
  14  *   ownership. The ASF licenses this file to you under the Apache
  15  *   License, Version 2.0 (the "License"); you may not use this file
  16  *   except in compliance with the License. You may obtain a copy of
  17  *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
  18  */
  19
  20 #include <sal/config.h>
  21
  22 #include <eventmultiplexer.hxx>
  23 #include "slideoverlaybutton.hxx"
  24
  25 #include <canvas/canvastools.hxx>
  26 #include <cppcanvas/customsprite.hxx>
  27 #include <basegfx/vector/b2dsize.hxx>
  28 #include <basegfx/vector/b2dvector.hxx>
  29 #include <comphelper/diagnose_ex.hxx>
  30
  31 #include <com/sun/star/presentation/XSlideShowView.hpp>
  32 #include <com/sun/star/rendering/XCanvas.hpp>
  33
  34 #include <algorithm>
  35 #include <utility>
  36
  37 namespace slideshow::internal
  38 {
  39 SlideOverlayButtonSharedPtr
  40 SlideOverlayButton::create(const css::uno::Reference<css::rendering::XBitmap>& xIconBitmap,
  41                            const css::awt::Point& rPosition,
  42                            const std::function<void(basegfx::B2DPoint)>& clickHandler,
  43                            ScreenUpdater& rScreenUpdater, EventMultiplexer& rEventMultiplexer,
  44                            const UnoViewContainer& rViewContainer)
  45 {
  46     SlideOverlayButtonSharedPtr pRet(new SlideOverlayButton(
  47         xIconBitmap, rPosition, clickHandler, rScreenUpdater, rEventMultiplexer, rViewContainer));
  48
  49     rEventMultiplexer.addViewHandler(pRet);
  50     // Set priority to 1000 so that the handler fires before the click handler on the slide
  51     rEventMultiplexer.addClickHandler(pRet, 1000);
  52     return pRet;
  53 }
  54
  55 SlideOverlayButton::SlideOverlayButton(css::uno::Reference<css::rendering::XBitmap> xIconBitmap,
  56                                        css::awt::Point pPosition,
  57                                        std::function<void(basegfx::B2DPoint)> clickHandler,
  58                                        ScreenUpdater& rScreenUpdater,
  59                                        EventMultiplexer& rEventMultiplexer,
  60                                        const UnoViewContainer& rViewContainer)
  61     : mxIconBitmap(std::move(xIconBitmap))
  62     , mrEventMultiplexer(rEventMultiplexer)
  63     , mpPosition(std::move(pPosition))
  64     , mClickHandler(std::move(clickHandler))
  65     , mrScreenUpdater(rScreenUpdater)
  66 {
  67     for (const auto& pView : rViewContainer)
  68         viewAdded(pView);
  69 }
  70
  71 void SlideOverlayButton::setVisible(const bool bVisible)
  72 {
  73     if (mbVisible == bVisible)
  74         return;
  75
  76     mbVisible = bVisible;
  77
  78     for (const auto& rView : maViews)
  79         if (rView.second)
  80             rView.second->show();
  81
  82     // sprites changed, need a screen update for this frame.
  83     mrScreenUpdater.requestImmediateUpdate();
  84 }
  85
  86 css::geometry::IntegerSize2D SlideOverlayButton::getSize() const { return mxIconBitmap->getSize(); }
  87
  88 basegfx::B2DPoint SlideOverlayButton::calcSpritePos(UnoViewSharedPtr const& rView) const
  89 {
  90     const css::awt::Rectangle aViewArea(rView->getUnoView()->getCanvasArea());
  91     return basegfx::B2DPoint(
  92         aViewArea.X + std::min(aViewArea.Width, mpPosition.X),
  93         aViewArea.Y
  94             + std::max(sal_Int32(0),
  95                        aViewArea.Height - mxIconBitmap->getSize().Height - mpPosition.Y));
  96 }
  97
  98 void SlideOverlayButton::viewAdded(const UnoViewSharedPtr& rView)
  99 {
 100     cppcanvas::CustomSpriteSharedPtr sprite;
 101
 102     try
 103     {
 104         const css::geometry::IntegerSize2D spriteSize(mxIconBitmap->getSize());
 105         sprite = rView->createSprite(basegfx::B2DSize(spriteSize.Width, spriteSize.Height),
 106                                      1000.0); // sprite should be in front of all
 107         // other sprites
 108         css::rendering::ViewState viewState;
 109         canvas::tools::initViewState(viewState);
 110         css::rendering::RenderState renderState;
 111         canvas::tools::initRenderState(renderState);
 112         sprite->getContentCanvas()->getUNOCanvas()->drawBitmap(mxIconBitmap, viewState,
 113                                                                renderState);
 114
 115         sprite->setAlpha(0.9);
 116         sprite->movePixel(calcSpritePos(rView));
 117         sprite->show();
 118     }
 119     catch (css::uno::Exception&)
 120     {
 121         TOOLS_WARN_EXCEPTION("slideshow", "");
 122     }
 123
 124     maViews.emplace_back(rView, sprite);
 125 }
 126
 127 void SlideOverlayButton::viewRemoved(const UnoViewSharedPtr& rView)
 128 {
 129     std::erase_if(maViews, [&rView](const ViewsVecT::value_type& cp) { return rView == cp.first; });
 130 }
 131
 132 void SlideOverlayButton::viewChanged(const UnoViewSharedPtr& rView)
 133 {
 134     // find entry corresponding to modified view
 135     ViewsVecT::iterator aModifiedEntry(
 136         std::find_if(maViews.begin(), maViews.end(),
 137                      [&rView](const ViewsVecT::value_type& cp) { return rView == cp.first; }));
 138
 139     assert(aModifiedEntry != maViews.end());
 140     if (aModifiedEntry == maViews.end())
 141         return;
 142
 143     if (aModifiedEntry->second)
 144         aModifiedEntry->second->movePixel(calcSpritePos(aModifiedEntry->first));
 145 }
 146
 147 void SlideOverlayButton::viewsChanged()
 148 {
 149     // reposition sprites on all views
 150     for (const auto& rView : maViews)
 151     {
 152         if (rView.second)
 153             rView.second->movePixel(calcSpritePos(rView.first));
 154     }
 155 }
 156
 157 bool SlideOverlayButton::handleMousePressed(const css::awt::MouseEvent& /*e*/) { return false; }
 158
 159 bool SlideOverlayButton::handleMouseReleased(const css::awt::MouseEvent& e)
 160 {
 161     css::uno::Reference<css::presentation::XSlideShowView> view(e.Source,
 162                                                                 css::uno::UNO_QUERY_THROW);
 163     const basegfx::B2DPoint btnPnt(
 164         view->getCanvasArea().X + std::min(view->getCanvasArea().Width, mpPosition.X),
 165         view->getCanvasArea().Y
 166             + std::max(sal_Int32(0), view->getCanvasArea().Height - mxIconBitmap->getSize().Height
 167                                          - mpPosition.Y));
 168     const basegfx::B2DPoint clickPnt
 169         = mrEventMultiplexer.toNormalPoint(e.Source, basegfx::B2DPoint(e.X, e.Y));
 170     if (clickPnt.getX() > btnPnt.getX()
 171         && clickPnt.getX() < btnPnt.getX() + mxIconBitmap->getSize().Width
 172         && clickPnt.getY() > btnPnt.getY()
 173         && clickPnt.getY() < btnPnt.getY() + mxIconBitmap->getSize().Height)
 174     {
 175         if (mnIgnoreClicksCnt == 0)
 176         {
 177             mnIgnoreClicksCnt = e.ClickCount - 1;
 178             mClickHandler(clickPnt);
 179         }
 180         else
 181         {
 182             mnIgnoreClicksCnt--;
 183         }
 184         return true;
 185     }
 186     return false;
 187 }
 188
 189 bool SlideOverlayButton::handleMouseDragged(const css::awt::MouseEvent& /*e*/) { return false; }
 190
 191 bool SlideOverlayButton::handleMouseMoved(const css::awt::MouseEvent& /*e*/) { return false; }
 192
 193 } // namespace slideshow::internal
 194
 195 /* vim:set shiftwidth=4 softtabstop=4 expandtab cinoptions=b1,g0,N-s cinkeys+=0=break: */