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///////////////////////////////////////////////////////////////////////////////
// Name: tests/geometry/region.cpp
// Purpose: wxRegion unit test
// Author: Vadim Zeitlin
// Created: 2011-10-12
// Copyright: (c) 2011 Vadim Zeitlin <vadim@wxwidgets.org>
///////////////////////////////////////////////////////////////////////////////
// ----------------------------------------------------------------------------
// headers
// ----------------------------------------------------------------------------
#include "testprec.h"
#ifdef __BORLANDC__
#pragma hdrstop
#endif
#ifndef WX_PRECOMP
#include "wx/region.h"
#endif // WX_PRECOMP
#include "wx/iosfwrap.h"
// ----------------------------------------------------------------------------
// helper functions
// ----------------------------------------------------------------------------
namespace
{
// This function could be easily added to wxRegionIterator itself, where it
// could be implemented far more efficiently as all major platforms store the
// number of rectangles anyhow, but as we only use it for debugging purposes,
// just keep it here for now.
unsigned GetRectsCount(const wxRegion& rgn)
{
unsigned count = 0;
for ( wxRegionIterator iter(rgn); iter.HaveRects(); ++iter )
count++;
return count;
}
} // anonymous namespace
// this operator is needed to use CPPUNIT_ASSERT_EQUAL with wxRegions
std::ostream& operator<<(std::ostream& os, const wxRegion& rgn)
{
wxRect r = rgn.GetBox();
os << "# rects = " << GetRectsCount(rgn)
<< "; bounding box {"
<< r.x << ", " << r.y << ", " << r.width << ", " << r.height
<< "}";
return os;
}
// ----------------------------------------------------------------------------
// test class
// ----------------------------------------------------------------------------
class RegionTestCase : public CppUnit::TestCase
{
public:
RegionTestCase() { }
private:
CPPUNIT_TEST_SUITE( RegionTestCase );
CPPUNIT_TEST( Validity );
CPPUNIT_TEST( Intersect );
CPPUNIT_TEST_SUITE_END();
void Validity();
void Intersect();
wxDECLARE_NO_COPY_CLASS(RegionTestCase);
};
// register in the unnamed registry so that these tests are run by default
CPPUNIT_TEST_SUITE_REGISTRATION( RegionTestCase );
// also include in its own registry so that these tests can be run alone
CPPUNIT_TEST_SUITE_NAMED_REGISTRATION( RegionTestCase, "RegionTestCase" );
void RegionTestCase::Validity()
{
wxRegion r;
CPPUNIT_ASSERT_MESSAGE
(
"Default constructed region must be invalid",
!r.IsOk()
);
CPPUNIT_ASSERT_MESSAGE
(
"Invalid region should be empty",
r.IsEmpty()
);
// Offsetting an invalid region doesn't make sense.
WX_ASSERT_FAILS_WITH_ASSERT( r.Offset(1, 1) );
CPPUNIT_ASSERT_MESSAGE
(
"Combining with a valid region should create a valid region",
r.Union(0, 0, 10, 10)
);
CPPUNIT_ASSERT_EQUAL_MESSAGE
(
"Union() with invalid region should give the same region",
wxRegion(0, 0, 10, 10),
r
);
}
void RegionTestCase::Intersect()
{
const wxPoint points1[] = {
wxPoint(310, 392),
wxPoint(270, 392),
wxPoint(270, 421),
wxPoint(310, 421)
};
wxRegion region1(WXSIZEOF(points1), points1);
const wxPoint points2[] = {
wxPoint(54, 104),
wxPoint(85, 82),
wxPoint(68, 58),
wxPoint(37, 80)
};
wxRegion region2(4,points2);
CPPUNIT_ASSERT( region1.Intersect(region2) );
CPPUNIT_ASSERT( region1.IsEmpty() );
}
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