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///////////////////////////////////////////////////////////////////////////////
// Name: tests/graphics/measuring.cpp
// Purpose: Tests for wxGraphicsRenderer::CreateMeasuringContext
// Author: Kevin Ollivier, Vadim Zeitlin (non wxGC parts)
// Created: 2008-02-12
// Copyright: (c) 2008 Kevin Ollivier <kevino@theolliviers.com>
// (c) 2012 Vadim Zeitlin <vadim@wxwidgets.org>
///////////////////////////////////////////////////////////////////////////////
// ----------------------------------------------------------------------------
// headers
// ----------------------------------------------------------------------------
#include "testprec.h"
#ifdef __BORLANDC__
#pragma hdrstop
#endif
#ifndef WX_PRECOMP
#include "wx/app.h"
#include "wx/font.h"
#include "wx/window.h"
#endif // WX_PRECOMP
// wxCairoRenderer::CreateMeasuringContext() is not implement for wxX11
#if wxUSE_GRAPHICS_CONTEXT && !defined(__WXX11__)
#include "wx/graphics.h"
#define TEST_GC
#endif
#include "wx/dcclient.h"
#include "wx/dcps.h"
#include "wx/metafile.h"
// ----------------------------------------------------------------------------
// test class
// ----------------------------------------------------------------------------
class MeasuringTextTestCase : public CppUnit::TestCase
{
public:
MeasuringTextTestCase() { }
private:
CPPUNIT_TEST_SUITE( MeasuringTextTestCase );
CPPUNIT_TEST( DCGetTextExtent );
CPPUNIT_TEST( LeadingAndDescent );
CPPUNIT_TEST( WindowGetTextExtent );
CPPUNIT_TEST( GetPartialTextExtent );
#ifdef TEST_GC
CPPUNIT_TEST( GraphicsGetTextExtent );
#endif // TEST_GC
CPPUNIT_TEST_SUITE_END();
void DCGetTextExtent();
void LeadingAndDescent();
void WindowGetTextExtent();
void GetPartialTextExtent();
#ifdef TEST_GC
void GraphicsGetTextExtent();
#endif // TEST_GC
DECLARE_NO_COPY_CLASS(MeasuringTextTestCase)
};
// register in the unnamed registry so that these tests are run by default
CPPUNIT_TEST_SUITE_REGISTRATION( MeasuringTextTestCase );
// also include in its own registry so that these tests can be run alone
CPPUNIT_TEST_SUITE_NAMED_REGISTRATION( MeasuringTextTestCase, "MeasuringTextTestCase" );
// ----------------------------------------------------------------------------
// helper for XXXTextExtent() methods
// ----------------------------------------------------------------------------
template <typename T>
struct GetTextExtentTester
{
// Constructor runs a couple of simple tests for GetTextExtent().
GetTextExtentTester(const T& obj)
{
// Test that getting the height only doesn't crash.
int y;
obj.GetTextExtent("H", NULL, &y);
CPPUNIT_ASSERT( y > 1 );
wxSize size = obj.GetTextExtent("Hello");
CPPUNIT_ASSERT( size.x > 1 );
CPPUNIT_ASSERT_EQUAL( y, size.y );
}
};
// ----------------------------------------------------------------------------
// tests themselves
// ----------------------------------------------------------------------------
void MeasuringTextTestCase::DCGetTextExtent()
{
wxClientDC dc(wxTheApp->GetTopWindow());
GetTextExtentTester<wxClientDC> testDC(dc);
int w;
dc.GetMultiLineTextExtent("Good\nbye", &w, NULL);
const wxSize sz = dc.GetTextExtent("Good");
CPPUNIT_ASSERT_EQUAL( sz.x, w );
CPPUNIT_ASSERT( dc.GetMultiLineTextExtent("Good\nbye").y >= 2*sz.y );
// Test the functions with some other DC kinds also.
#if wxUSE_PRINTING_ARCHITECTURE && wxUSE_POSTSCRIPT
wxPostScriptDC psdc;
// wxPostScriptDC doesn't have any font set by default but its
// GetTextExtent() requires one to be set. This is probably a bug and we
// should set the default font in it implicitly but for now just work
// around it.
psdc.SetFont(*wxNORMAL_FONT);
GetTextExtentTester<wxPostScriptDC> testPS(psdc);
#endif
#if wxUSE_ENH_METAFILE
wxEnhMetaFileDC metadc;
GetTextExtentTester<wxEnhMetaFileDC> testMF(metadc);
#endif
}
void MeasuringTextTestCase::LeadingAndDescent()
{
wxClientDC dc(wxTheApp->GetTopWindow());
// Retrieving just the descent should work.
int descent = -17;
dc.GetTextExtent("foo", NULL, NULL, &descent);
CPPUNIT_ASSERT( descent != -17 );
// Same for external leading.
int leading = -289;
dc.GetTextExtent("foo", NULL, NULL, NULL, &leading);
CPPUNIT_ASSERT( leading != -289 );
// And both should also work for the empty string as they retrieve the
// values valid for the entire font and not just this string.
int descent2,
leading2;
dc.GetTextExtent("", NULL, NULL, &descent2, &leading2);
CPPUNIT_ASSERT_EQUAL( descent, descent2 );
CPPUNIT_ASSERT_EQUAL( leading, leading2 );
}
void MeasuringTextTestCase::WindowGetTextExtent()
{
wxWindow* const win = wxTheApp->GetTopWindow();
GetTextExtentTester<wxWindow> testWin(*win);
}
void MeasuringTextTestCase::GetPartialTextExtent()
{
wxClientDC dc(wxTheApp->GetTopWindow());
wxArrayInt widths;
CPPUNIT_ASSERT( dc.GetPartialTextExtents("Hello", widths) );
CPPUNIT_ASSERT_EQUAL( 5, widths.size() );
CPPUNIT_ASSERT_EQUAL( widths[0], dc.GetTextExtent("H").x );
CPPUNIT_ASSERT_EQUAL( widths[4], dc.GetTextExtent("Hello").x );
}
#ifdef TEST_GC
void MeasuringTextTestCase::GraphicsGetTextExtent()
{
wxGraphicsRenderer* renderer = wxGraphicsRenderer::GetDefaultRenderer();
CPPUNIT_ASSERT(renderer);
wxGraphicsContext* context = renderer->CreateMeasuringContext();
CPPUNIT_ASSERT(context);
wxFont font(12, wxFONTFAMILY_DEFAULT, wxFONTSTYLE_NORMAL, wxFONTWEIGHT_NORMAL);
CPPUNIT_ASSERT(font.IsOk());
context->SetFont(font, *wxBLACK);
double width, height, descent, externalLeading = 0.0;
context->GetTextExtent("x", &width, &height, &descent, &externalLeading);
// TODO: Determine a way to make these tests more robust.
CPPUNIT_ASSERT(width > 0.0);
CPPUNIT_ASSERT(height > 0.0);
}
#endif // TEST_GC
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