Line data    Source code

       1             : /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
       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             : 
      21             : #include <canvas/debug.hxx>
      22             : #include <basegfx/matrix/b2dhommatrix.hxx>
      23             : #include <basegfx/point/b2dpoint.hxx>
      24             : #include <basegfx/numeric/ftools.hxx>
      25             : #include <basegfx/matrix/b2dhommatrixtools.hxx>
      26             : #include "waterfallwipe.hxx"
      27             : #include "transitiontools.hxx"
      28             : 
      29             : 
      30             : namespace slideshow {
      31             : namespace internal {
      32             : 
      33           0 : WaterfallWipe::WaterfallWipe( sal_Int32 nElements, bool flipOnYAxis )
      34           0 :     : m_flipOnYAxis( flipOnYAxis )
      35             : {
      36             :     const sal_Int32 sqrtElements = static_cast<sal_Int32>(
      37           0 :         sqrt( static_cast<double>(nElements) ) );
      38           0 :     const double elementEdge = (1.0 / sqrtElements);
      39           0 :     m_waterfall.append( ::basegfx::B2DPoint( 0.0, -1.0 ) );
      40           0 :     for ( sal_Int32 pos = sqrtElements; pos--; )
      41             :     {
      42           0 :         const sal_Int32 xPos = (sqrtElements - pos - 1);
      43           0 :         const double yPos = ::basegfx::pruneScaleValue( ((pos + 1) * elementEdge) - 1.0 );
      44             :         m_waterfall.append( ::basegfx::B2DPoint(
      45             :                                 ::basegfx::pruneScaleValue( xPos * elementEdge ),
      46           0 :                                 yPos ) );
      47             :         m_waterfall.append( ::basegfx::B2DPoint(
      48           0 :                                 ::basegfx::pruneScaleValue( (xPos + 1) * elementEdge ),
      49           0 :                                 yPos ) );
      50             :     }
      51           0 :     m_waterfall.append( ::basegfx::B2DPoint( 1.0, -1.0 ) );
      52           0 :     m_waterfall.setClosed(true);
      53           0 : }
      54             : 
      55           0 : ::basegfx::B2DPolyPolygon WaterfallWipe::operator () ( double t )
      56             : {
      57           0 :     ::basegfx::B2DPolygon poly( m_waterfall );
      58           0 :     poly.transform(basegfx::tools::createTranslateB2DHomMatrix(0.0, ::basegfx::pruneScaleValue(2.0 * t)));
      59           0 :     poly.setB2DPoint( 0, ::basegfx::B2DPoint( 0.0, -1.0 ) );
      60           0 :     poly.setB2DPoint( poly.count()-1, ::basegfx::B2DPoint( 1.0, -1.0 ) );
      61             : 
      62             :     return m_flipOnYAxis ? flipOnYAxis( ::basegfx::B2DPolyPolygon(poly) )
      63           0 :                          : ::basegfx::B2DPolyPolygon(poly);
      64             : }
      65             : 
      66             : }
      67             : }
      68             : 
      69             : /* vim:set shiftwidth=4 softtabstop=4 expandtab: */