kicad/qa/common/view/test_zoom_controller.cpp

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/*
* This program source code file is part of KiCad, a free EDA CAD application.
*
* Copyright (C) 2018 KiCad Developers, see CHANGELOG.TXT for contributors.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, you may find one here:
* http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
* or you may search the http://www.gnu.org website for the version 2 license,
* or you may write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
*/
#include <unit_test_utils/unit_test_utils.h>
#include <view/zoom_controller.h>
// All these tests are of a class in KIGFX
using namespace KIGFX;
BOOST_AUTO_TEST_SUITE( ZoomController )
struct CONST_ZOOM_CASE
{
double scale_factor;
int scroll_amount;
double exp_zoom_in;
double exp_zoom_out;
};
/*
* Some "sane" examples for steps, scale factors and results.
* These should be actual examples that could be encountered
*
* TODO: Add more cases for, eg, Mac
*/
static const std::vector<CONST_ZOOM_CASE> const_zoom_cases = {
// A single scroll step on a GTK3 Linux system
// 120 is the standard wheel delta, so it's what you might expect
// from a single scroll wheel detent.
{ CONSTANT_ZOOM_CONTROLLER::GTK3_SCALE, 120, 1.1, 1 / 1.1 },
};
/**
* Check basic setting and getting of values
*/
BOOST_AUTO_TEST_CASE( ConstController )
{
// How close we need to be (not very, this is a subjective thing anyway)
const double tol_percent = 10;
double scale_for_step;
for( const auto& c : const_zoom_cases )
{
CONSTANT_ZOOM_CONTROLLER zoom_ctrl( c.scale_factor );
scale_for_step = zoom_ctrl.GetScaleForRotation( c.scroll_amount );
BOOST_CHECK_CLOSE( scale_for_step, c.exp_zoom_in, tol_percent );
scale_for_step = zoom_ctrl.GetScaleForRotation( -c.scroll_amount );
BOOST_CHECK_CLOSE( scale_for_step, c.exp_zoom_out, tol_percent );
}
}
/**
* Timestamper that returns predefined values from a vector
*/
class PREDEF_TIMESTAMPER : public ACCELERATING_ZOOM_CONTROLLER::TIMESTAMP_PROVIDER
{
public:
using STAMP_LIST = std::vector<int>;
PREDEF_TIMESTAMPER( const STAMP_LIST& aStamps )
: m_stamps( aStamps ), m_iter( m_stamps.begin() )
{
}
/**
* @return the next time point in the predefined sequence
*/
ACCELERATING_ZOOM_CONTROLLER::TIME_PT GetTimestamp() override
{
// Don't ask for more samples than given
BOOST_REQUIRE( m_iter != m_stamps.end() );
return ACCELERATING_ZOOM_CONTROLLER::TIME_PT( std::chrono::milliseconds( *m_iter++ ) );
}
const STAMP_LIST m_stamps;
STAMP_LIST::const_iterator m_iter;
};
struct ACCEL_ZOOM_CASE
{
int timeout;
std::vector<int> stamps; // NB includes the initial stamp!
std::vector<int> scrolls;
std::vector<double> zooms;
};
static const std::vector<ACCEL_ZOOM_CASE> accel_cases = {
// Scrolls widely spaced, just go up and down by a constant factor
{ 500, { 0, 1000, 2000, 3000 }, { 120, 120, -120 }, { 1.05, 1.05, 1 / 1.05 } },
// Close scrolls - acceleration on the latter
{ 500, { 0, 1000, 1100 }, { 120, 120 }, { 1.05, 2.05 } },
};
/**
* Check basic setting and getting of values
*/
BOOST_AUTO_TEST_CASE( AccelController )
{
const double tol_percent = 10.0;
for( const auto& c : accel_cases )
{
PREDEF_TIMESTAMPER timestamper( c.stamps );
ACCELERATING_ZOOM_CONTROLLER zoom_ctrl(
ACCELERATING_ZOOM_CONTROLLER::DEFAULT_ACCELERATION_SCALE,
std::chrono::milliseconds( c.timeout ), &timestamper );
for( unsigned i = 0; i < c.scrolls.size(); i++ )
{
const auto zoom_scale = zoom_ctrl.GetScaleForRotation( c.scrolls[i] );
BOOST_CHECK_CLOSE( zoom_scale, c.zooms[i], tol_percent );
}
}
}
BOOST_AUTO_TEST_SUITE_END()