dd4eefcb29
Document which wxRegion methods can and can't be used when the region itself is invalid. Apply the minor changes to wxGTK (Xor() didn't do the right thing, Offset() didn't assert) and wxOSX (Offset() crashed) to make their behaviour consistent with wxMSW. Add a (trivial, so far, but to be extended later) wxRegion unit test checking that the methods do indeed behave as documented. git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@69461 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
115 lines
3.0 KiB
C++
115 lines
3.0 KiB
C++
///////////////////////////////////////////////////////////////////////////////
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// Name: tests/geometry/region.cpp
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// Purpose: wxRegion unit test
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// Author: Vadim Zeitlin
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// Created: 2011-10-12
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// RCS-ID: $Id$
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// Copyright: (c) 2011 Vadim Zeitlin <vadim@wxwidgets.org>
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///////////////////////////////////////////////////////////////////////////////
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// ----------------------------------------------------------------------------
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// headers
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// ----------------------------------------------------------------------------
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#include "testprec.h"
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#ifdef __BORLANDC__
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#pragma hdrstop
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#endif
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#ifndef WX_PRECOMP
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#include "wx/region.h"
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#endif // WX_PRECOMP
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#include "wx/iosfwrap.h"
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// ----------------------------------------------------------------------------
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// helper functions
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// ----------------------------------------------------------------------------
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namespace
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{
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// This function could be easily added to wxRegionIterator itself, where it
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// could be implemented far more efficiently as all major platforms store the
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// number of rectangles anyhow, but as we only use it for debugging purposes,
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// just keep it here for now.
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unsigned GetRectsCount(const wxRegion& rgn)
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{
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unsigned count = 0;
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for ( wxRegionIterator iter(rgn); iter.HaveRects(); ++iter )
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count++;
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return count;
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}
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} // anonymous namespace
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// this operator is needed to use CPPUNIT_ASSERT_EQUAL with wxRegions
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std::ostream& operator<<(std::ostream& os, const wxRegion& rgn)
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{
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wxRect r = rgn.GetBox();
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os << "# rects = " << GetRectsCount(rgn)
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<< "; bounding box {"
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<< r.x << ", " << r.y << ", " << r.width << ", " << r.height
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<< "}";
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return os;
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}
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// ----------------------------------------------------------------------------
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// test class
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// ----------------------------------------------------------------------------
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class RegionTestCase : public CppUnit::TestCase
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{
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public:
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RegionTestCase() { }
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private:
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CPPUNIT_TEST_SUITE( RegionTestCase );
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CPPUNIT_TEST( Validity );
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CPPUNIT_TEST_SUITE_END();
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void Validity();
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wxDECLARE_NO_COPY_CLASS(RegionTestCase);
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};
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// register in the unnamed registry so that these tests are run by default
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CPPUNIT_TEST_SUITE_REGISTRATION( RegionTestCase );
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// also include in its own registry so that these tests can be run alone
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CPPUNIT_TEST_SUITE_NAMED_REGISTRATION( RegionTestCase, "RegionTestCase" );
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void RegionTestCase::Validity()
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{
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wxRegion r;
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CPPUNIT_ASSERT_MESSAGE
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(
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"Default constructed region must be invalid",
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!r.IsOk()
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);
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CPPUNIT_ASSERT_MESSAGE
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(
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"Invalid region should be empty",
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r.IsEmpty()
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);
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// Offsetting an invalid region doesn't make sense.
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WX_ASSERT_FAILS_WITH_ASSERT( r.Offset(1, 1) );
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CPPUNIT_ASSERT_MESSAGE
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(
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"Combining with a valid region should create a valid region",
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r.Union(0, 0, 10, 10)
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);
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CPPUNIT_ASSERT_EQUAL_MESSAGE
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(
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"Union() with invalid region should give the same region",
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wxRegion(0, 0, 10, 10),
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r
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);
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}
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