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f806b2b4 1///////////////////////////////////////////////////////////////////////////////
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2// Name: tests/graphics/measuring.cpp
3// Purpose: Tests for wxGraphicsRenderer::CreateMeasuringContext
8cd79b7a 4// Author: Kevin Ollivier, Vadim Zeitlin (non wxGC parts)
f806b2b4 5// Created: 2008-02-12
2fc9c1ea 6// Copyright: (c) 2008 Kevin Ollivier <kevino@theolliviers.com>
8cd79b7a 7// (c) 2012 Vadim Zeitlin <vadim@wxwidgets.org>
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8///////////////////////////////////////////////////////////////////////////////
9
10// ----------------------------------------------------------------------------
11// headers
12// ----------------------------------------------------------------------------
13
14#include "testprec.h"
15
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16#ifdef __BORLANDC__
17 #pragma hdrstop
18#endif
19
20#ifndef WX_PRECOMP
21 #include "wx/app.h"
22 #include "wx/font.h"
23 #include "wx/window.h"
24#endif // WX_PRECOMP
25
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26// wxCairoRenderer::CreateMeasuringContext() is not implement for wxX11
27#if wxUSE_GRAPHICS_CONTEXT && !defined(__WXX11__)
28 #include "wx/graphics.h"
29 #define TEST_GC
30#endif
31
32#include "wx/dcclient.h"
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33#include "wx/dcps.h"
34#include "wx/metafile.h"
8cd79b7a 35
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36// ----------------------------------------------------------------------------
37// test class
38// ----------------------------------------------------------------------------
39
8cd79b7a 40class MeasuringTextTestCase : public CppUnit::TestCase
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41{
42public:
8cd79b7a 43 MeasuringTextTestCase() { }
f806b2b4 44
f806b2b4 45private:
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46 CPPUNIT_TEST_SUITE( MeasuringTextTestCase );
47 CPPUNIT_TEST( DCGetTextExtent );
0646084e 48 CPPUNIT_TEST( LeadingAndDescent );
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49 CPPUNIT_TEST( WindowGetTextExtent );
50 CPPUNIT_TEST( GetPartialTextExtent );
51#ifdef TEST_GC
52 CPPUNIT_TEST( GraphicsGetTextExtent );
53#endif // TEST_GC
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54 CPPUNIT_TEST_SUITE_END();
55
8cd79b7a 56 void DCGetTextExtent();
0646084e 57 void LeadingAndDescent();
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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)
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67};
68
69// register in the unnamed registry so that these tests are run by default
8cd79b7a 70CPPUNIT_TEST_SUITE_REGISTRATION( MeasuringTextTestCase );
f806b2b4 71
e3778b4d 72// also include in its own registry so that these tests can be run alone
8cd79b7a 73CPPUNIT_TEST_SUITE_NAMED_REGISTRATION( MeasuringTextTestCase, "MeasuringTextTestCase" );
f806b2b4 74
f806b2b4 75// ----------------------------------------------------------------------------
c7619cf1 76// helper for XXXTextExtent() methods
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77// ----------------------------------------------------------------------------
78
8cd79b7a 79template <typename T>
c7619cf1 80struct GetTextExtentTester
8cd79b7a 81{
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82 // Constructor runs a couple of simple tests for GetTextExtent().
83 GetTextExtentTester(const T& obj)
84 {
85 // Test that getting the height only doesn't crash.
86 int y;
87 obj.GetTextExtent("H", NULL, &y);
88
89 CPPUNIT_ASSERT( y > 1 );
90
91 wxSize size = obj.GetTextExtent("Hello");
92 CPPUNIT_ASSERT( size.x > 1 );
93 CPPUNIT_ASSERT_EQUAL( y, size.y );
94 }
95};
8cd79b7a 96
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97// ----------------------------------------------------------------------------
98// tests themselves
99// ----------------------------------------------------------------------------
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100
101void MeasuringTextTestCase::DCGetTextExtent()
102{
103 wxClientDC dc(wxTheApp->GetTopWindow());
104
c7619cf1 105 GetTextExtentTester<wxClientDC> testDC(dc);
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106
107 int w;
108 dc.GetMultiLineTextExtent("Good\nbye", &w, NULL);
109 const wxSize sz = dc.GetTextExtent("Good");
110 CPPUNIT_ASSERT_EQUAL( sz.x, w );
111
112 CPPUNIT_ASSERT( dc.GetMultiLineTextExtent("Good\nbye").y >= 2*sz.y );
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113
114 // Test the functions with some other DC kinds also.
115#if wxUSE_PRINTING_ARCHITECTURE && wxUSE_POSTSCRIPT
116 wxPostScriptDC psdc;
117 // wxPostScriptDC doesn't have any font set by default but its
118 // GetTextExtent() requires one to be set. This is probably a bug and we
119 // should set the default font in it implicitly but for now just work
120 // around it.
121 psdc.SetFont(*wxNORMAL_FONT);
c7619cf1 122 GetTextExtentTester<wxPostScriptDC> testPS(psdc);
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123#endif
124
125#if wxUSE_ENH_METAFILE
126 wxEnhMetaFileDC metadc;
c7619cf1 127 GetTextExtentTester<wxEnhMetaFileDC> testMF(metadc);
1bce253a 128#endif
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129}
130
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131void MeasuringTextTestCase::LeadingAndDescent()
132{
133 wxClientDC dc(wxTheApp->GetTopWindow());
134
135 // Retrieving just the descent should work.
136 int descent = -17;
137 dc.GetTextExtent("foo", NULL, NULL, &descent);
138 CPPUNIT_ASSERT( descent != -17 );
139
140 // Same for external leading.
141 int leading = -289;
142 dc.GetTextExtent("foo", NULL, NULL, NULL, &leading);
143 CPPUNIT_ASSERT( leading != -289 );
144
145 // And both should also work for the empty string as they retrieve the
146 // values valid for the entire font and not just this string.
147 int descent2,
148 leading2;
149 dc.GetTextExtent("", NULL, NULL, &descent2, &leading2);
150
151 CPPUNIT_ASSERT_EQUAL( descent, descent2 );
152 CPPUNIT_ASSERT_EQUAL( leading, leading2 );
153}
154
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155void MeasuringTextTestCase::WindowGetTextExtent()
156{
157 wxWindow* const win = wxTheApp->GetTopWindow();
158
c7619cf1 159 GetTextExtentTester<wxWindow> testWin(*win);
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160}
161
162void MeasuringTextTestCase::GetPartialTextExtent()
163{
164 wxClientDC dc(wxTheApp->GetTopWindow());
165
166 wxArrayInt widths;
167 CPPUNIT_ASSERT( dc.GetPartialTextExtents("Hello", widths) );
168 CPPUNIT_ASSERT_EQUAL( 5, widths.size() );
169 CPPUNIT_ASSERT_EQUAL( widths[0], dc.GetTextExtent("H").x );
170 CPPUNIT_ASSERT_EQUAL( widths[4], dc.GetTextExtent("Hello").x );
171}
172
173#ifdef TEST_GC
174
175void MeasuringTextTestCase::GraphicsGetTextExtent()
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176{
177 wxGraphicsRenderer* renderer = wxGraphicsRenderer::GetDefaultRenderer();
178 CPPUNIT_ASSERT(renderer);
179 wxGraphicsContext* context = renderer->CreateMeasuringContext();
180 CPPUNIT_ASSERT(context);
181 wxFont font(12, wxFONTFAMILY_DEFAULT, wxFONTSTYLE_NORMAL, wxFONTWEIGHT_NORMAL);
182 CPPUNIT_ASSERT(font.IsOk());
183 context->SetFont(font, *wxBLACK);
184 double width, height, descent, externalLeading = 0.0;
185 context->GetTextExtent("x", &width, &height, &descent, &externalLeading);
186
187 // TODO: Determine a way to make these tests more robust.
188 CPPUNIT_ASSERT(width > 0.0);
189 CPPUNIT_ASSERT(height > 0.0);
190
191}
192
8cd79b7a 193#endif // TEST_GC