tests/graphics/measuring.cpp

   1 ///////////////////////////////////////////////////////////////////////////////
   2 // Name:        tests/graphics/measuring.cpp
   3 // Purpose:     Tests for wxGraphicsRenderer::CreateMeasuringContext
   4 // Author:      Kevin Ollivier, Vadim Zeitlin (non wxGC parts)
   5 // Created:     2008-02-12
   6 // RCS-ID:      $Id$
   7 // Copyright:   (c) 2008 Kevin Ollivier <kevino@theolliviers.com>
   8 //              (c) 2012 Vadim Zeitlin <vadim@wxwidgets.org>
   9 ///////////////////////////////////////////////////////////////////////////////
  10
  11 // ----------------------------------------------------------------------------
  12 // headers
  13 // ----------------------------------------------------------------------------
  14
  15 #include "testprec.h"
  16
  17 #ifdef __BORLANDC__
  18     #pragma hdrstop
  19 #endif
  20
  21 #ifndef WX_PRECOMP
  22     #include "wx/app.h"
  23     #include "wx/font.h"
  24     #include "wx/window.h"
  25 #endif // WX_PRECOMP
  26
  27 // wxCairoRenderer::CreateMeasuringContext() is not implement for wxX11
  28 #if wxUSE_GRAPHICS_CONTEXT && !defined(__WXX11__)
  29     #include "wx/graphics.h"
  30     #define TEST_GC
  31 #endif
  32
  33 #include "wx/dcclient.h"
  34
  35 // ----------------------------------------------------------------------------
  36 // test class
  37 // ----------------------------------------------------------------------------
  38
  39 class MeasuringTextTestCase : public CppUnit::TestCase
  40 {
  41 public:
  42     MeasuringTextTestCase() { }
  43
  44 private:
  45     CPPUNIT_TEST_SUITE( MeasuringTextTestCase );
  46         CPPUNIT_TEST( DCGetTextExtent );
  47         CPPUNIT_TEST( WindowGetTextExtent );
  48         CPPUNIT_TEST( GetPartialTextExtent );
  49 #ifdef TEST_GC
  50         CPPUNIT_TEST( GraphicsGetTextExtent );
  51 #endif // TEST_GC
  52     CPPUNIT_TEST_SUITE_END();
  53
  54     template <typename T>
  55     void DoTestGetTextExtent(const T& obj);
  56
  57     void DCGetTextExtent();
  58     void WindowGetTextExtent();
  59
  60     void GetPartialTextExtent();
  61
  62 #ifdef TEST_GC
  63     void GraphicsGetTextExtent();
  64 #endif // TEST_GC
  65
  66     DECLARE_NO_COPY_CLASS(MeasuringTextTestCase)
  67 };
  68
  69 // register in the unnamed registry so that these tests are run by default
  70 CPPUNIT_TEST_SUITE_REGISTRATION( MeasuringTextTestCase );
  71
  72 // also include in its own registry so that these tests can be run alone
  73 CPPUNIT_TEST_SUITE_NAMED_REGISTRATION( MeasuringTextTestCase, "MeasuringTextTestCase" );
  74
  75 // ----------------------------------------------------------------------------
  76 // tests themselves
  77 // ----------------------------------------------------------------------------
  78
  79 template <typename T>
  80 void MeasuringTextTestCase::DoTestGetTextExtent(const T& obj)
  81 {
  82     // Test that getting the height only doesn't crash.
  83     int y;
  84     obj.GetTextExtent("H", NULL, &y);
  85
  86     CPPUNIT_ASSERT( y > 1 );
  87
  88     wxSize size = obj.GetTextExtent("Hello");
  89     CPPUNIT_ASSERT( size.x > 1 );
  90     CPPUNIT_ASSERT_EQUAL( y, size.y );
  91 }
  92
  93 void MeasuringTextTestCase::DCGetTextExtent()
  94 {
  95     wxClientDC dc(wxTheApp->GetTopWindow());
  96
  97     DoTestGetTextExtent(dc);
  98
  99     int w;
 100     dc.GetMultiLineTextExtent("Good\nbye", &w, NULL);
 101     const wxSize sz = dc.GetTextExtent("Good");
 102     CPPUNIT_ASSERT_EQUAL( sz.x, w );
 103
 104     CPPUNIT_ASSERT( dc.GetMultiLineTextExtent("Good\nbye").y >= 2*sz.y );
 105 }
 106
 107 void MeasuringTextTestCase::WindowGetTextExtent()
 108 {
 109     wxWindow* const win = wxTheApp->GetTopWindow();
 110
 111     DoTestGetTextExtent(*win);
 112 }
 113
 114 void MeasuringTextTestCase::GetPartialTextExtent()
 115 {
 116     wxClientDC dc(wxTheApp->GetTopWindow());
 117
 118     wxArrayInt widths;
 119     CPPUNIT_ASSERT( dc.GetPartialTextExtents("Hello", widths) );
 120     CPPUNIT_ASSERT_EQUAL( 5, widths.size() );
 121     CPPUNIT_ASSERT_EQUAL( widths[0], dc.GetTextExtent("H").x );
 122     CPPUNIT_ASSERT_EQUAL( widths[4], dc.GetTextExtent("Hello").x );
 123 }
 124
 125 #ifdef TEST_GC
 126
 127 void MeasuringTextTestCase::GraphicsGetTextExtent()
 128 {
 129     wxGraphicsRenderer* renderer = wxGraphicsRenderer::GetDefaultRenderer();
 130     CPPUNIT_ASSERT(renderer);
 131     wxGraphicsContext* context = renderer->CreateMeasuringContext();
 132     CPPUNIT_ASSERT(context);
 133     wxFont font(12, wxFONTFAMILY_DEFAULT, wxFONTSTYLE_NORMAL, wxFONTWEIGHT_NORMAL);
 134     CPPUNIT_ASSERT(font.IsOk());
 135     context->SetFont(font, *wxBLACK);
 136     double width, height, descent, externalLeading = 0.0;
 137     context->GetTextExtent("x", &width, &height, &descent, &externalLeading);
 138
 139     // TODO: Determine a way to make these tests more robust.
 140     CPPUNIT_ASSERT(width > 0.0);
 141     CPPUNIT_ASSERT(height > 0.0);
 142
 143 }
 144
 145 #endif // TEST_GC