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 // RCS-ID:      $Id$
   7 // Copyright:   (c) 2010 wxWidgets development team
   8 ///////////////////////////////////////////////////////////////////////////////
   9
  10 // ----------------------------------------------------------------------------
  11 // headers
  12 // ----------------------------------------------------------------------------
  13
  14 #include "testprec.h"
  15
  16 #ifdef __BORLANDC__
  17     #pragma hdrstop
  18 #endif
  19
  20 #ifndef WX_PRECOMP
  21     #include "wx/app.h"
  22 #endif // WX_PRECOMP
  23
  24 #include "wx/wrapsizer.h"
  25
  26 #include "asserthelper.h"
  27
  28 // ----------------------------------------------------------------------------
  29 // test class
  30 // ----------------------------------------------------------------------------
  31
  32 class WrapSizerTestCase : public CppUnit::TestCase
  33 {
  34 public:
  35     WrapSizerTestCase() { }
  36
  37     virtual void setUp();
  38     virtual void tearDown();
  39
  40 private:
  41     CPPUNIT_TEST_SUITE( WrapSizerTestCase );
  42         CPPUNIT_TEST( CalcMin );
  43     CPPUNIT_TEST_SUITE_END();
  44
  45     void CalcMin();
  46
  47     wxWindow *m_win;
  48     wxSizer *m_sizer;
  49
  50     DECLARE_NO_COPY_CLASS(WrapSizerTestCase)
  51 };
  52
  53 // register in the unnamed registry so that these tests are run by default
  54 CPPUNIT_TEST_SUITE_REGISTRATION( WrapSizerTestCase );
  55
  56 // also include in its own registry so that these tests can be run alone
  57 CPPUNIT_TEST_SUITE_NAMED_REGISTRATION( WrapSizerTestCase, "WrapSizerTestCase" );
  58
  59 // ----------------------------------------------------------------------------
  60 // test initialization
  61 // ----------------------------------------------------------------------------
  62
  63 void WrapSizerTestCase::setUp()
  64 {
  65     m_win = new wxWindow(wxTheApp->GetTopWindow(), wxID_ANY);
  66     m_win->SetClientSize(180, 240);
  67
  68     m_sizer = new wxWrapSizer(wxHORIZONTAL);
  69     m_win->SetSizer(m_sizer);
  70 }
  71
  72 void WrapSizerTestCase::tearDown()
  73 {
  74     delete m_win;
  75     m_win = NULL;
  76
  77     m_sizer = NULL;
  78 }
  79
  80 // ----------------------------------------------------------------------------
  81 // tests themselves
  82 // ----------------------------------------------------------------------------
  83
  84 void WrapSizerTestCase::CalcMin()
  85 {
  86     const wxSize sizeTotal = m_win->GetClientSize();
  87     wxSize sizeMinExpected;
  88
  89     // With a single child the min size must be the same as child size.
  90     const wxSize sizeChild1 = wxSize(sizeTotal.x/2 - 10, sizeTotal.y/4);
  91     sizeMinExpected = sizeChild1;
  92
  93     wxWindow * const
  94         child1 = new wxWindow(m_win, wxID_ANY, wxDefaultPosition, sizeChild1);
  95     child1->SetBackgroundColour(*wxRED);
  96     m_sizer->Add(child1);
  97     m_win->Layout();
  98
  99     CPPUNIT_ASSERT_EQUAL( sizeMinExpected, m_sizer->CalcMin() );
 100
 101     // If both children can fit in the same row, the minimal size of the sizer
 102     // is determined by the sum of their minimal horizontal dimensions and
 103     // the maximum of their minimal vertical dimensions.
 104     const wxSize sizeChild2 = wxSize(sizeTotal.x/2 + 10, sizeTotal.y/3);
 105     sizeMinExpected.x += sizeChild2.x;
 106     sizeMinExpected.y = wxMax(sizeChild1.y, sizeChild2.y);
 107
 108     wxWindow * const
 109         child2 = new wxWindow(m_win, wxID_ANY, wxDefaultPosition, sizeChild2);
 110     child2->SetBackgroundColour(*wxYELLOW);
 111     m_sizer->Add(child2);
 112     m_win->Layout();
 113
 114     CPPUNIT_ASSERT_EQUAL( sizeMinExpected, m_sizer->CalcMin() );
 115
 116     // Three children will take at least two rows so the minimal size in
 117     // vertical direction must increase.
 118     const wxSize sizeChild3 = wxSize(sizeTotal.x/2, sizeTotal.y/5);
 119     sizeMinExpected.y += sizeChild3.y;
 120
 121     wxWindow * const
 122         child3 = new wxWindow(m_win, wxID_ANY, wxDefaultPosition, sizeChild3);
 123     child3->SetBackgroundColour(*wxGREEN);
 124     m_sizer->Add(child3);
 125     m_win->Layout();
 126
 127     CPPUNIT_ASSERT_EQUAL( sizeMinExpected, m_sizer->CalcMin() );
 128 }