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+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * 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
+ * with this work for additional information regarding copyright
+ * 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
+ * the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+
+#include <com/sun/star/awt/MouseButton.hpp>
+#include <com/sun/star/awt/MouseEvent.hpp>
+
+#include <basegfx/point/b2dpoint.hxx>
+#include <basegfx/polygon/b2dpolygon.hxx>
+#include <basegfx/matrix/b2dhommatrix.hxx>
+#include <cppcanvas/basegfxfactory.hxx>
+#include <tools/diagnose_ex.h>
+
+#include <slideshowcontext.hxx>
+#include "userpaintoverlay.hxx"
+#include <mouseeventhandler.hxx>
+#include <eventmultiplexer.hxx>
+#include <screenupdater.hxx>
+#include <vieweventhandler.hxx>
+
+#include <slide.hxx>
+#include <cursormanager.hxx>
+
+using namespace ::com::sun::star;
+
+namespace slideshow::internal
+{
+ class PaintOverlayHandler : public MouseEventHandler,
+ public ViewEventHandler,
+ public UserPaintEventHandler
+ {
+ public:
+ PaintOverlayHandler( const RGBColor& rStrokeColor,
+ double nStrokeWidth,
+ ScreenUpdater& rScreenUpdater,
+ const UnoViewContainer& rViews,
+ Slide& rSlide,
+ PolyPolygonVector&& rPolygons,
+ bool bActive ) :
+ mrScreenUpdater( rScreenUpdater ),
+ maViews(),
+ maPolygons( std::move(rPolygons) ),
+ maStrokeColor( rStrokeColor ),
+ mnStrokeWidth( nStrokeWidth ),
+ maLastPoint(),
+ maLastMouseDownPos(),
+ mbIsLastPointValid( false ),
+ mbIsLastMouseDownPosValid( false ),
+ //handle the "remove all ink from slide" mode of erasing
+ mbIsEraseAllModeActivated( false ),
+ //handle the "remove stroke by stroke" mode of erasing
+ mbIsEraseModeActivated( false ),
+ mrSlide(rSlide),
+ mnSize(100),
+ mbActive( bActive )
+ {
+ for( const auto& rView : rViews )
+ viewAdded( rView );
+
+ drawPolygons();
+ }
+
+ void dispose()
+ {
+ maViews.clear();
+ }
+
+ // ViewEventHandler methods
+ virtual void viewAdded( const UnoViewSharedPtr& rView ) override
+ {
+ maViews.push_back( rView );
+ }
+
+ virtual void viewRemoved( const UnoViewSharedPtr& rView ) override
+ {
+ maViews.erase( ::std::remove( maViews.begin(),
+ maViews.end(),
+ rView ) );
+ }
+
+ virtual void viewChanged( const UnoViewSharedPtr& /*rView*/ ) override
+ {
+ // TODO(F2): for persistent drawings, need to store
+ // polygon and repaint here.
+ }
+
+ virtual void viewsChanged() override
+ {
+ // TODO(F2): for persistent drawings, need to store
+ // polygon and repaint here.
+ }
+
+ bool colorChanged( RGBColor const& rUserColor ) override
+ {
+ mbIsLastPointValid = false;
+ mbActive = true;
+ maStrokeColor = rUserColor;
+ mbIsEraseModeActivated = false;
+ return true;
+ }
+
+ bool widthChanged( double nUserStrokeWidth ) override
+ {
+ mnStrokeWidth = nUserStrokeWidth;
+ mbIsEraseModeActivated = false;
+ return true;
+ }
+
+ void repaintWithoutPolygons()
+ {
+ // must get access to the instance to erase all polygon
+ for( const auto& rxView : maViews )
+ {
+ // fully clear view content to background color
+ //rxView->getCanvas()->clear();
+
+ //get via SlideImpl instance the bitmap of the slide unmodified to redraw it
+ SlideBitmapSharedPtr pBitmap( mrSlide.getCurrentSlideBitmap( rxView ) );
+ ::cppcanvas::CanvasSharedPtr pCanvas( rxView->getCanvas() );
+
+ const ::basegfx::B2DHomMatrix aViewTransform( rxView->getTransformation() );
+ const ::basegfx::B2DPoint aOutPosPixel( aViewTransform * ::basegfx::B2DPoint() );
+
+ // setup a canvas with device coordinate space, the slide
+ // bitmap already has the correct dimension.
+ ::cppcanvas::CanvasSharedPtr pDevicePixelCanvas( pCanvas->clone() );
+
+ pDevicePixelCanvas->setTransformation( ::basegfx::B2DHomMatrix() );
+
+ // render at given output position
+ pBitmap->move( aOutPosPixel );
+
+ // clear clip (might have been changed, e.g. from comb
+ // transition)
+ pBitmap->clip( ::basegfx::B2DPolyPolygon() );
+ pBitmap->draw( pDevicePixelCanvas );
+
+ mrScreenUpdater.notifyUpdate(rxView,true);
+ }
+ }
+
+ bool eraseAllInkChanged( bool bEraseAllInk ) override
+ {
+ mbIsEraseAllModeActivated = bEraseAllInk;
+ // if the erase all mode is activated it will remove all ink from slide,
+ // therefore destroy all the polygons stored
+ if(mbIsEraseAllModeActivated)
+ {
+ // The Erase Mode should be deactivated
+ mbIsEraseModeActivated = false;
+ repaintWithoutPolygons();
+ maPolygons.clear();
+ }
+ mbIsEraseAllModeActivated=false;
+ return true;
+ }
+
+ bool eraseInkWidthChanged( sal_Int32 rEraseInkSize ) override
+ {
+ // Change the size
+ mnSize=rEraseInkSize;
+ // Changed to mode Erase
+ mbIsEraseModeActivated = true;
+ return true;
+ }
+
+ bool switchPenMode() override
+ {
+ mbIsLastPointValid = false;
+ mbActive = true;
+ mbIsEraseModeActivated = false;
+ return true;
+ }
+
+ bool switchEraserMode() override
+ {
+ mbIsLastPointValid = false;
+ mbActive = true;
+ mbIsEraseModeActivated = true;
+ return true;
+ }
+
+ bool disable() override
+ {
+ mbIsLastPointValid = false;
+ mbIsLastMouseDownPosValid = false;
+ mbActive = false;
+ return true;
+ }
+
+ //Draw all registered polygons.
+ void drawPolygons()
+ {
+ for( const auto& rxPolygon : maPolygons )
+ {
+ rxPolygon->draw();
+ }
+ // screen update necessary to show painting
+ mrScreenUpdater.notifyUpdate();
+ }
+
+ //Retrieve all registered polygons.
+ const PolyPolygonVector& getPolygons() const
+ {
+ return maPolygons;
+ }
+
+ // MouseEventHandler methods
+ virtual bool handleMousePressed( const awt::MouseEvent& e ) override
+ {
+ if( !mbActive )
+ return false;
+
+ if (e.Buttons == awt::MouseButton::RIGHT)
+ {
+ mbIsLastPointValid = false;
+ return false;
+ }
+
+ if (e.Buttons != awt::MouseButton::LEFT)
+ return false;
+
+ maLastMouseDownPos.setX( e.X );
+ maLastMouseDownPos.setY( e.Y );
+ mbIsLastMouseDownPosValid = true;
+
+ // eat mouse click (though we don't process it
+ // _directly_, it enables the drag mode
+ return true;
+ }
+
+ virtual bool handleMouseReleased( const awt::MouseEvent& e ) override
+ {
+ if( !mbActive )
+ return false;
+
+ if (e.Buttons == awt::MouseButton::RIGHT)
+ {
+ mbIsLastPointValid = false;
+ return false;
+ }
+
+ if (e.Buttons != awt::MouseButton::LEFT)
+ return false;
+
+ // check, whether up- and down press are on exactly
+ // the same pixel. If that's the case, ignore the
+ // click, and pass on the event to low-prio
+ // handlers. This effectively permits effect
+ // advancements via clicks also when user paint is
+ // enabled.
+ if( mbIsLastMouseDownPosValid &&
+ ::basegfx::B2DPoint( e.X,
+ e.Y ) == maLastMouseDownPos )
+ {
+ mbIsLastMouseDownPosValid = false;
+ return false;
+ }
+
+ // invalidate, next downpress will have to start a new
+ // polygon.
+ mbIsLastPointValid = false;
+
+ // eat mouse click (though we don't process it
+ // _directly_, it enables the drag mode
+ return true;
+ }
+
+ virtual bool handleMouseDragged( const awt::MouseEvent& e ) override
+ {
+ if( !mbActive )
+ return false;
+
+ if (e.Buttons == awt::MouseButton::RIGHT)
+ {
+ mbIsLastPointValid = false;
+ return false;
+ }
+
+ if(mbIsEraseModeActivated)
+ {
+ //define the last point as an object
+ //we suppose that there's no way this point could be valid
+ ::basegfx::B2DPolygon aPoly;
+
+ maLastPoint.setX( e.X-mnSize );
+ maLastPoint.setY( e.Y-mnSize );
+
+ aPoly.append( maLastPoint );
+
+ maLastPoint.setX( e.X-mnSize );
+ maLastPoint.setY( e.Y+mnSize );
+
+ aPoly.append( maLastPoint );
+ maLastPoint.setX( e.X+mnSize );
+ maLastPoint.setY( e.Y+mnSize );
+
+ aPoly.append( maLastPoint );
+ maLastPoint.setX( e.X+mnSize );
+ maLastPoint.setY( e.Y-mnSize );
+
+ aPoly.append( maLastPoint );
+ maLastPoint.setX( e.X-mnSize );
+ maLastPoint.setY( e.Y-mnSize );
+
+ aPoly.append( maLastPoint );
+
+ //now we have defined a Polygon that is closed
+
+ //The point is to redraw the LastPoint the way it was originally on the bitmap,
+ //of the slide
+ for (const auto& rxView : maViews)
+ {
+
+ //get via SlideImpl instance the bitmap of the slide unmodified to redraw it
+ SlideBitmapSharedPtr pBitmap( mrSlide.getCurrentSlideBitmap( rxView ) );
+ ::cppcanvas::CanvasSharedPtr pCanvas( rxView->getCanvas() );
+
+ ::basegfx::B2DHomMatrix aViewTransform( rxView->getTransformation() );
+ const ::basegfx::B2DPoint aOutPosPixel( aViewTransform * ::basegfx::B2DPoint() );
+
+ // setup a canvas with device coordinate space, the slide
+ // bitmap already has the correct dimension.
+ ::cppcanvas::CanvasSharedPtr pDevicePixelCanvas( pCanvas->clone() );
+
+ pDevicePixelCanvas->setTransformation( ::basegfx::B2DHomMatrix() );
+
+ // render at given output position
+ pBitmap->move( aOutPosPixel );
+
+ ::basegfx::B2DPolyPolygon aPolyPoly(aPoly);
+ aViewTransform.translate(-aOutPosPixel.getX(), -aOutPosPixel.getY());
+ aPolyPoly.transform(aViewTransform);
+ // set clip so that we just redraw a part of the canvas
+ pBitmap->clip(aPolyPoly);
+ pBitmap->draw( pDevicePixelCanvas );
+
+ mrScreenUpdater.notifyUpdate(rxView,true);
+ }
+
+ }
+ else
+ {
+ if( !mbIsLastPointValid )
+ {
+ mbIsLastPointValid = true;
+ maLastPoint.setX( e.X );
+ maLastPoint.setY( e.Y );
+ }
+ else
+ {
+ ::basegfx::B2DPolygon aPoly;
+ aPoly.append( maLastPoint );
+
+ maLastPoint.setX( e.X );
+ maLastPoint.setY( e.Y );
+
+ aPoly.append( maLastPoint );
+
+ // paint to all views
+ for (const auto& rxView : maViews)
+ {
+ ::cppcanvas::PolyPolygonSharedPtr pPolyPoly(
+ ::cppcanvas::BaseGfxFactory::createPolyPolygon( rxView->getCanvas(),
+ aPoly ) );
+
+ if( pPolyPoly )
+ {
+ pPolyPoly->setStrokeWidth(mnStrokeWidth);
+ pPolyPoly->setRGBALineColor( maStrokeColor.getIntegerColor() );
+ pPolyPoly->draw();
+ maPolygons.push_back(pPolyPoly);
+ }
+ }
+
+ // screen update necessary to show painting
+ mrScreenUpdater.notifyUpdate();
+ }
+ }
+ // mouse events captured
+ return true;
+ }
+
+ virtual bool handleMouseMoved( const awt::MouseEvent& /*e*/ ) override
+ {
+ // not used here
+ return false; // did not handle the event
+ }
+
+ private:
+ ScreenUpdater& mrScreenUpdater;
+ UnoViewVector maViews;
+ PolyPolygonVector maPolygons;
+ RGBColor maStrokeColor;
+ double mnStrokeWidth;
+ basegfx::B2DPoint maLastPoint;
+ basegfx::B2DPoint maLastMouseDownPos;
+ bool mbIsLastPointValid;
+ bool mbIsLastMouseDownPosValid;
+ // added bool for erasing purpose :
+ bool mbIsEraseAllModeActivated;
+ bool mbIsEraseModeActivated;
+ Slide& mrSlide;
+ sal_Int32 mnSize;
+ bool mbActive;
+ };
+
+ UserPaintOverlaySharedPtr UserPaintOverlay::create( const RGBColor& rStrokeColor,
+ double nStrokeWidth,
+ const SlideShowContext& rContext,
+ PolyPolygonVector&& rPolygons,
+ bool bActive )
+ {
+ UserPaintOverlaySharedPtr pRet( new UserPaintOverlay( rStrokeColor,
+ nStrokeWidth,
+ rContext,
+ std::move(rPolygons),
+ bActive));
+
+ return pRet;
+ }
+
+ UserPaintOverlay::UserPaintOverlay( const RGBColor& rStrokeColor,
+ double nStrokeWidth,
+ const SlideShowContext& rContext,
+ PolyPolygonVector&& rPolygons,
+ bool bActive ) :
+ mpHandler( std::make_shared<PaintOverlayHandler>( rStrokeColor,
+ nStrokeWidth,
+ rContext.mrScreenUpdater,
+ rContext.mrViewContainer,
+ //adding a link to Slide
+ dynamic_cast<Slide&>(rContext.mrCursorManager),
+ std::move(rPolygons), bActive )),
+ mrMultiplexer( rContext.mrEventMultiplexer )
+ {
+ mrMultiplexer.addClickHandler( mpHandler, 3.0 );
+ mrMultiplexer.addMouseMoveHandler( mpHandler, 3.0 );
+ mrMultiplexer.addViewHandler( mpHandler );
+ mrMultiplexer.addUserPaintHandler(mpHandler);
+ }
+
+ PolyPolygonVector const & UserPaintOverlay::getPolygons() const
+ {
+ return mpHandler->getPolygons();
+ }
+
+ void UserPaintOverlay::drawPolygons()
+ {
+ mpHandler->drawPolygons();
+ }
+
+ UserPaintOverlay::~UserPaintOverlay()
+ {
+ try
+ {
+ mrMultiplexer.removeMouseMoveHandler( mpHandler );
+ mrMultiplexer.removeClickHandler( mpHandler );
+ mrMultiplexer.removeViewHandler( mpHandler );
+ mpHandler->dispose();
+ }
+ catch (const uno::Exception&)
+ {
+ TOOLS_WARN_EXCEPTION("slideshow", "");
+ }
+ }
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */