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0b2d4d4879
Recommendation is to avoid using the year nomenclature as this information is already encoded in the git repo. Avoids needing to repeatly update. Also updates AUTHORS.txt from current repo with contributor names
139 lines
4.3 KiB
C++
139 lines
4.3 KiB
C++
/*
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* This program source code file is part of KiCad, a free EDA CAD application.
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*
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* Copyright (C) 2012 Torsten Hueter, torstenhtr <at> gmx.de
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* Copyright (C) 2013-2015 CERN
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* Copyright The KiCad Developers, see AUTHORS.txt for contributors.
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*
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* @author Tomasz Wlostowski <tomasz.wlostowski@cern.ch>
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* @author Maciej Suminski <maciej.suminski@cern.ch>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, you may find one here:
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* http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
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* or you may search the http://www.gnu.org website for the version 2 license,
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* or you may write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
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*/
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#include <view/zoom_controller.h>
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#include <trace_helpers.h>
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#include <wx/log.h>
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#include <algorithm>
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using namespace KIGFX;
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/**
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* A very simple timestamper that uses the #KIGFX::ACCELERATING_ZOOM_CONTROLLER::CLOCK
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* to provide a timestamp. Since that's a steady_clock, it's monotonic.
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*/
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class SIMPLE_TIMESTAMPER : public ACCELERATING_ZOOM_CONTROLLER::TIMESTAMP_PROVIDER
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{
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public:
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ACCELERATING_ZOOM_CONTROLLER::TIME_PT GetTimestamp() override
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{
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return ACCELERATING_ZOOM_CONTROLLER::CLOCK::now();
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}
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};
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ACCELERATING_ZOOM_CONTROLLER::ACCELERATING_ZOOM_CONTROLLER(
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double aScale, const TIMEOUT& aAccTimeout, TIMESTAMP_PROVIDER* aTimestampProv ) :
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m_accTimeout( aAccTimeout ),
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m_scale( aScale )
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{
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if( aTimestampProv )
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{
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m_timestampProv = aTimestampProv;
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}
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else
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{
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m_ownTimestampProv = std::make_unique<SIMPLE_TIMESTAMPER>();
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m_timestampProv = m_ownTimestampProv.get();
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}
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m_prevTimestamp = m_timestampProv->GetTimestamp();
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}
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double ACCELERATING_ZOOM_CONTROLLER::GetScaleForRotation( int aRotation )
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{
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// The minimal step value when changing the current zoom level
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const double minStep = 1.05;
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const auto timestamp = m_timestampProv->GetTimestamp();
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auto timeDiff = std::chrono::duration_cast<TIMEOUT>( timestamp - m_prevTimestamp );
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m_prevTimestamp = timestamp;
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wxLogTrace( traceZoomScroll,
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wxString::Format( "Rot %d, time diff: %ldms", aRotation, (long)timeDiff.count() ) );
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double zoomScale;
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// Set scaling speed depending on scroll wheel event interval
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if( timeDiff < m_accTimeout
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&& ( (aRotation > 0) == m_prevRotationPositive ) )
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{
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zoomScale = ( 2.05 * m_scale / 5.0 ) - timeDiff / m_accTimeout;
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// be sure zoomScale value is significant
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zoomScale = std::max( zoomScale, minStep );
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if( aRotation < 0 )
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zoomScale = 1.0 / zoomScale;
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}
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else
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{
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zoomScale = ( aRotation > 0 ) ? minStep : 1 / minStep;
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}
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m_prevRotationPositive = aRotation > 0;
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wxLogTrace( traceZoomScroll, wxString::Format( " Zoom factor: %f", zoomScale ) );
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return zoomScale;
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}
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#ifdef __MINGW32__
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// For some reason, this is needed to avoid a link issue
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// (undefined reference to ACCELERATING_ZOOM_CONTROLLER::DEFAULT_TIMEOUT
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// and GAL_API CONSTANT_ZOOM_CONTROLLER::MSW_SCALE)
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constexpr ACCELERATING_ZOOM_CONTROLLER::TIMEOUT ACCELERATING_ZOOM_CONTROLLER::DEFAULT_TIMEOUT;
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constexpr double GAL_API CONSTANT_ZOOM_CONTROLLER::MSW_SCALE;
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#endif
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CONSTANT_ZOOM_CONTROLLER::CONSTANT_ZOOM_CONTROLLER( double aScale ) : m_scale( aScale )
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{
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}
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double CONSTANT_ZOOM_CONTROLLER::GetScaleForRotation( int aRotation )
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{
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wxLogTrace( traceZoomScroll, wxString::Format( "Rot %d", aRotation ) );
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aRotation = ( aRotation > 0 ) ? std::min( aRotation, 100 ) : std::max( aRotation, -100 );
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double dscale = aRotation * m_scale;
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double zoom_scale = ( aRotation > 0 ) ? ( 1 + dscale ) : 1 / ( 1 - dscale );
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wxLogTrace( traceZoomScroll, wxString::Format( " Zoom factor: %f", zoom_scale ) );
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return zoom_scale;
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}
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