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 #include "wx/dcps.h"
  35 #include "wx/metafile.h"
  36
  37 // ----------------------------------------------------------------------------
  38 // test class
  39 // ----------------------------------------------------------------------------
  40
  41 class MeasuringTextTestCase : public CppUnit::TestCase
  42 {
  43 public:
  44     MeasuringTextTestCase() { }
  45
  46 private:
  47     CPPUNIT_TEST_SUITE( MeasuringTextTestCase );
  48         CPPUNIT_TEST( DCGetTextExtent );
  49         CPPUNIT_TEST( WindowGetTextExtent );
  50         CPPUNIT_TEST( GetPartialTextExtent );
  51 #ifdef TEST_GC
  52         CPPUNIT_TEST( GraphicsGetTextExtent );
  53 #endif // TEST_GC
  54     CPPUNIT_TEST_SUITE_END();
  55
  56     template <typename T>
  57     void DoTestGetTextExtent(const T& obj);
  58
  59     void DCGetTextExtent();
  60     void WindowGetTextExtent();
  61
  62     void GetPartialTextExtent();
  63
  64 #ifdef TEST_GC
  65     void GraphicsGetTextExtent();
  66 #endif // TEST_GC
  67
  68     DECLARE_NO_COPY_CLASS(MeasuringTextTestCase)
  69 };
  70
  71 // register in the unnamed registry so that these tests are run by default
  72 CPPUNIT_TEST_SUITE_REGISTRATION( MeasuringTextTestCase );
  73
  74 // also include in its own registry so that these tests can be run alone
  75 CPPUNIT_TEST_SUITE_NAMED_REGISTRATION( MeasuringTextTestCase, "MeasuringTextTestCase" );
  76
  77 // ----------------------------------------------------------------------------
  78 // tests themselves
  79 // ----------------------------------------------------------------------------
  80
  81 template <typename T>
  82 void MeasuringTextTestCase::DoTestGetTextExtent(const T& obj)
  83 {
  84     // Test that getting the height only doesn't crash.
  85     int y;
  86     obj.GetTextExtent("H", NULL, &y);
  87
  88     CPPUNIT_ASSERT( y > 1 );
  89
  90     wxSize size = obj.GetTextExtent("Hello");
  91     CPPUNIT_ASSERT( size.x > 1 );
  92     CPPUNIT_ASSERT_EQUAL( y, size.y );
  93 }
  94
  95 void MeasuringTextTestCase::DCGetTextExtent()
  96 {
  97     wxClientDC dc(wxTheApp->GetTopWindow());
  98
  99     DoTestGetTextExtent(dc);
 100
 101     int w;
 102     dc.GetMultiLineTextExtent("Good\nbye", &w, NULL);
 103     const wxSize sz = dc.GetTextExtent("Good");
 104     CPPUNIT_ASSERT_EQUAL( sz.x, w );
 105
 106     CPPUNIT_ASSERT( dc.GetMultiLineTextExtent("Good\nbye").y >= 2*sz.y );
 107
 108     // Test the functions with some other DC kinds also.
 109 #if wxUSE_PRINTING_ARCHITECTURE && wxUSE_POSTSCRIPT
 110     wxPostScriptDC psdc;
 111     // wxPostScriptDC doesn't have any font set by default but its
 112     // GetTextExtent() requires one to be set. This is probably a bug and we
 113     // should set the default font in it implicitly but for now just work
 114     // around it.
 115     psdc.SetFont(*wxNORMAL_FONT);
 116     DoTestGetTextExtent(psdc);
 117 #endif
 118
 119 #if wxUSE_ENH_METAFILE
 120     wxEnhMetaFileDC metadc;
 121     DoTestGetTextExtent(metadc);
 122 #endif
 123 }
 124
 125 void MeasuringTextTestCase::WindowGetTextExtent()
 126 {
 127     wxWindow* const win = wxTheApp->GetTopWindow();
 128
 129     DoTestGetTextExtent(*win);
 130 }
 131
 132 void MeasuringTextTestCase::GetPartialTextExtent()
 133 {
 134     wxClientDC dc(wxTheApp->GetTopWindow());
 135
 136     wxArrayInt widths;
 137     CPPUNIT_ASSERT( dc.GetPartialTextExtents("Hello", widths) );
 138     CPPUNIT_ASSERT_EQUAL( 5, widths.size() );
 139     CPPUNIT_ASSERT_EQUAL( widths[0], dc.GetTextExtent("H").x );
 140     CPPUNIT_ASSERT_EQUAL( widths[4], dc.GetTextExtent("Hello").x );
 141 }
 142
 143 #ifdef TEST_GC
 144
 145 void MeasuringTextTestCase::GraphicsGetTextExtent()
 146 {
 147     wxGraphicsRenderer* renderer = wxGraphicsRenderer::GetDefaultRenderer();
 148     CPPUNIT_ASSERT(renderer);
 149     wxGraphicsContext* context = renderer->CreateMeasuringContext();
 150     CPPUNIT_ASSERT(context);
 151     wxFont font(12, wxFONTFAMILY_DEFAULT, wxFONTSTYLE_NORMAL, wxFONTWEIGHT_NORMAL);
 152     CPPUNIT_ASSERT(font.IsOk());
 153     context->SetFont(font, *wxBLACK);
 154     double width, height, descent, externalLeading = 0.0;
 155     context->GetTextExtent("x", &width, &height, &descent, &externalLeading);
 156
 157     // TODO: Determine a way to make these tests more robust.
 158     CPPUNIT_ASSERT(width > 0.0);
 159     CPPUNIT_ASSERT(height > 0.0);
 160
 161 }
 162
 163 #endif // TEST_GC