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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"
#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/dcmemory.h"
#include "wx/dcps.h"
#include "wx/metafile.h"
#include "asserthelper.h"
// ----------------------------------------------------------------------------
// helper for XXXTextExtent() methods
// ----------------------------------------------------------------------------
namespace
{
// Run a couple of simple tests for GetTextExtent().
template <typename T>
void GetTextExtentTester(const T& obj)
{
// Test that getting the height only doesn't crash.
int y;
obj.GetTextExtent("H", NULL, &y);
CHECK( y > 1 );
wxSize size = obj.GetTextExtent("Hello");
CHECK( size.x > 1 );
CHECK( size.y == y );
// Test that getting text extent of an empty string returns (0, 0).
CHECK( obj.GetTextExtent(wxString()) == wxSize() );
}
} // anonymous namespace
// ----------------------------------------------------------------------------
// tests themselves
// ----------------------------------------------------------------------------
TEST_CASE("wxDC::GetTextExtent", "[dc][text-extent]")
{
wxClientDC dc(wxTheApp->GetTopWindow());
GetTextExtentTester(dc);
int w;
dc.GetMultiLineTextExtent("Good\nbye", &w, NULL);
const wxSize sz = dc.GetTextExtent("Good");
CHECK( w == sz.x );
CHECK( dc.GetMultiLineTextExtent("Good\nbye").y >= 2*sz.y );
// Check that empty lines get counted
CHECK( dc.GetMultiLineTextExtent("\n\n\n").y >= 3*sz.y );
// And even empty strings count like one line.
CHECK( dc.GetMultiLineTextExtent(wxString()) == wxSize(0, sz.y) );
}
TEST_CASE("wxMemoryDC::GetTextExtent", "[memdc][text-extent]")
{
wxBitmap bmp(100, 100);
wxMemoryDC memdc(bmp);
GetTextExtentTester(memdc);
// Under MSW, this wxDC should work even without any valid font -- but
// this is not the case under wxGTK and probably neither elsewhere, so
// restrict this test to that platform only.
#ifdef __WXMSW__
memdc.SetFont(wxNullFont);
GetTextExtentTester(memdc);
#endif // __WXMSW__
}
#if wxUSE_PRINTING_ARCHITECTURE && wxUSE_POSTSCRIPT
TEST_CASE("wxPostScriptDC::GetTextExtent", "[psdc][text-extent]")
{
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(psdc);
}
#endif // wxUSE_POSTSCRIPT
#if wxUSE_ENH_METAFILE
TEST_CASE("wxEnhMetaFileDC::GetTextExtent", "[emfdc][text-extent]")
{
wxEnhMetaFileDC metadc;
GetTextExtentTester(metadc);
}
#endif // wxUSE_ENH_METAFILE
TEST_CASE("wxDC::LeadingAndDescent", "[dc][text-extent]")
{
wxClientDC dc(wxTheApp->GetTopWindow());
// Retrieving just the descent should work.
int descent = -17;
dc.GetTextExtent("foo", NULL, NULL, &descent);
CHECK( descent != -17 );
// Same for external leading.
int leading = -289;
dc.GetTextExtent("foo", NULL, NULL, NULL, &leading);
CHECK( 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);
CHECK( descent2 == descent );
CHECK( leading2 == leading );
}
TEST_CASE("wxWindow::GetTextExtent", "[window][text-extent]")
{
wxWindow* const win = wxTheApp->GetTopWindow();
GetTextExtentTester(*win);
}
TEST_CASE("wxDC::GetPartialTextExtent", "[dc][text-extent][partial]")
{
wxClientDC dc(wxTheApp->GetTopWindow());
wxArrayInt widths;
REQUIRE( dc.GetPartialTextExtents("Hello", widths) );
REQUIRE( widths.size() == 5 );
CHECK( widths[0] == dc.GetTextExtent("H").x );
CHECK( widths[4] == dc.GetTextExtent("Hello").x );
}
#ifdef TEST_GC
TEST_CASE("wxGC::GetTextExtent", "[dc][text-extent]")
{
wxGraphicsRenderer* renderer = wxGraphicsRenderer::GetDefaultRenderer();
REQUIRE(renderer);
wxGraphicsContext* context = renderer->CreateMeasuringContext();
REQUIRE(context);
wxFont font(12, wxFONTFAMILY_DEFAULT, wxFONTSTYLE_NORMAL, wxFONTWEIGHT_NORMAL);
REQUIRE(font.IsOk());
context->SetFont(font, *wxBLACK);
double width, height, descent, externalLeading = 0.0;
context->GetTextExtent("x", &width, &height, &descent, &externalLeading);
delete context;
// TODO: Determine a way to make these tests more robust.
CHECK(width > 0.0);
CHECK(height > 0.0);
}
#endif // TEST_GC
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