tests/sizers/wrapsizer.cpp

   1 ///////////////////////////////////////////////////////////////////////////////
   2 // Name:        tests/sizers/wrapsizer.cpp
   3 // Purpose:     Unit tests for wxWrapSizer
   4 // Author:      Catalin Raceanu
   5 // Created:     2010-10-23
   6 // Copyright:   (c) 2010 wxWidgets development team
   7 ///////////////////////////////////////////////////////////////////////////////
   8
   9 // ----------------------------------------------------------------------------
  10 // headers
  11 // ----------------------------------------------------------------------------
  12
  13 #include "testprec.h"
  14
  15 #ifdef __BORLANDC__
  16     #pragma hdrstop
  17 #endif
  18
  19 #ifndef WX_PRECOMP
  20     #include "wx/app.h"
  21 #endif // WX_PRECOMP
  22
  23 #include "wx/wrapsizer.h"
  24
  25 #include "asserthelper.h"
  26
  27 // ----------------------------------------------------------------------------
  28 // test class
  29 // ----------------------------------------------------------------------------
  30
  31 class WrapSizerTestCase : public CppUnit::TestCase
  32 {
  33 public:
  34     WrapSizerTestCase() { }
  35
  36     virtual void setUp();
  37     virtual void tearDown();
  38
  39 private:
  40     CPPUNIT_TEST_SUITE( WrapSizerTestCase );
  41         CPPUNIT_TEST( CalcMin );
  42     CPPUNIT_TEST_SUITE_END();
  43
  44     void CalcMin();
  45
  46     wxWindow *m_win;
  47     wxSizer *m_sizer;
  48
  49     DECLARE_NO_COPY_CLASS(WrapSizerTestCase)
  50 };
  51
  52 // register in the unnamed registry so that these tests are run by default
  53 CPPUNIT_TEST_SUITE_REGISTRATION( WrapSizerTestCase );
  54
  55 // also include in its own registry so that these tests can be run alone
  56 CPPUNIT_TEST_SUITE_NAMED_REGISTRATION( WrapSizerTestCase, "WrapSizerTestCase" );
  57
  58 // ----------------------------------------------------------------------------
  59 // test initialization
  60 // ----------------------------------------------------------------------------
  61
  62 void WrapSizerTestCase::setUp()
  63 {
  64     m_win = new wxWindow(wxTheApp->GetTopWindow(), wxID_ANY);
  65     m_win->SetClientSize(180, 240);
  66
  67     m_sizer = new wxWrapSizer(wxHORIZONTAL);
  68     m_win->SetSizer(m_sizer);
  69 }
  70
  71 void WrapSizerTestCase::tearDown()
  72 {
  73     delete m_win;
  74     m_win = NULL;
  75
  76     m_sizer = NULL;
  77 }
  78
  79 // ----------------------------------------------------------------------------
  80 // tests themselves
  81 // ----------------------------------------------------------------------------
  82
  83 void WrapSizerTestCase::CalcMin()
  84 {
  85     const wxSize sizeTotal = m_win->GetClientSize();
  86     wxSize sizeMinExpected;
  87
  88     // With a single child the min size must be the same as child size.
  89     const wxSize sizeChild1 = wxSize(sizeTotal.x/2 - 10, sizeTotal.y/4);
  90     sizeMinExpected = sizeChild1;
  91
  92     wxWindow * const
  93         child1 = new wxWindow(m_win, wxID_ANY, wxDefaultPosition, sizeChild1);
  94     child1->SetBackgroundColour(*wxRED);
  95     m_sizer->Add(child1);
  96     m_win->Layout();
  97
  98     CPPUNIT_ASSERT_EQUAL( sizeMinExpected, m_sizer->CalcMin() );
  99
 100     // If both children can fit in the same row, the minimal size of the sizer
 101     // is determined by the sum of their minimal horizontal dimensions and
 102     // the maximum of their minimal vertical dimensions.
 103     const wxSize sizeChild2 = wxSize(sizeTotal.x/2 + 10, sizeTotal.y/3);
 104     sizeMinExpected.x += sizeChild2.x;
 105     sizeMinExpected.y = wxMax(sizeChild1.y, sizeChild2.y);
 106
 107     wxWindow * const
 108         child2 = new wxWindow(m_win, wxID_ANY, wxDefaultPosition, sizeChild2);
 109     child2->SetBackgroundColour(*wxYELLOW);
 110     m_sizer->Add(child2);
 111     m_win->Layout();
 112
 113     CPPUNIT_ASSERT_EQUAL( sizeMinExpected, m_sizer->CalcMin() );
 114
 115     // Three children will take at least two rows so the minimal size in
 116     // vertical direction must increase.
 117     const wxSize sizeChild3 = wxSize(sizeTotal.x/2, sizeTotal.y/5);
 118     sizeMinExpected.y += sizeChild3.y;
 119
 120     wxWindow * const
 121         child3 = new wxWindow(m_win, wxID_ANY, wxDefaultPosition, sizeChild3);
 122     child3->SetBackgroundColour(*wxGREEN);
 123     m_sizer->Add(child3);
 124     m_win->Layout();
 125
 126     CPPUNIT_ASSERT_EQUAL( sizeMinExpected, m_sizer->CalcMin() );
 127 }