Magic_Game/Easy2D/Node/EText.cpp

#include "..\enodes.h"
#include "..\Win\winbase.h"

e2d::EText::EText()
	: m_Color(EColor::WHITE)
	, m_bWordWrapping(false)
	, m_pFont(nullptr)
	, m_fWordWrappingWidth(0)
{
	this->setFont(new EFont());
}

e2d::EText::EText(const EString & text)
	: EText()
{
	this->setText(text);
	this->setFont(new EFont());
}

e2d::EText::EText(EFont * font)
	: EText()
{
	this->setFont(font);
}

e2d::EText::EText(const EString & text, EColor color, EFont * font)
	: EText()
{
	this->setText(text);
	this->setColor(color);
	this->setFont(font);
}

e2d::EText::EText(const EString & text, EColor color, EString fontFamily, float fontSize, EFontWeight fontWeight, bool italic)
{
	this->setText(text);
	this->setColor(color);
	this->setFont(new EFont(fontFamily, fontSize, fontWeight, italic));
}

e2d::EText::~EText()
{
	SafeReleaseAndClear(&m_pFont);
}

e2d::EString e2d::EText::getText() const
{
	return m_sText;
}

float e2d::EText::getWidth() const
{
	return m_fWordWrappingWidth * m_fScaleX;
}

float e2d::EText::getRealWidth() const
{
	return m_fWordWrappingWidth;
}

e2d::EColor e2d::EText::getColor() const
{
	return m_Color;
}

e2d::EFont * e2d::EText::getFont() const
{
	return m_pFont;
}

void e2d::EText::setText(const EString & text)
{
	m_sText = text;
	_initTextLayout();
}

void e2d::EText::setColor(EColor color)
{
	m_Color = color;
}

void e2d::EText::setFont(EFont * font)
{
	if (font)
	{
		SafeReleaseAndClear(&m_pFont);
		m_pFont = font;
		font->retain();

		_initTextLayout();
	}
}

void e2d::EText::setWordWrapping(bool value)
{
	m_bWordWrapping = value;
	_initTextLayout();
}

void e2d::EText::setWordWrappingWidth(float wordWrapWidth)
{
	m_fWordWrappingWidth = max(wordWrapWidth, 0);
	_initTextLayout();
}

void e2d::EText::_onRender()
{
	GetSolidColorBrush()->SetColor(D2D1::ColorF(m_Color.value, m_fDisplayOpacity));
	GetRenderTarget()->DrawTextW(
		m_sText.c_str(),
		UINT32(m_sText.length()),
		m_pFont->_getTextFormat(),
		D2D1::RectF(
			0,
			0,
			m_bWordWrapping ? m_fWordWrappingWidth : m_Size.width,
			getRealHeight()
		),
		GetSolidColorBrush()
	);
}

void e2d::EText::_initTextLayout()
{
	// δ<><CEB4><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ַ<EFBFBD><D6B7><EFBFBD>ʱ<EFBFBD><CAB1><EFBFBD>ı<EFBFBD><C4B1><EFBFBD><EFBFBD><EFBFBD>Ϊ 0
	if (!m_pFont || m_sText.empty())
	{
		this->_setHeight(0);
		m_fWordWrappingWidth = 0;
		return;
	}

	// δ<><CEB4><EFBFBD><EFBFBD><EFBFBD>ı<EFBFBD><C4B1>Զ<EFBFBD><D4B6><EFBFBD><EFBFBD><EFBFBD>ʱ<EFBFBD><CAB1><EFBFBD><EFBFBD><EFBFBD><EFBFBD> TextFormat <20><><EFBFBD><EFBFBD>Ϊ<EFBFBD><CEAA><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
	if (!m_bWordWrapping)
	{
		m_pFont->_getTextFormat()->SetWordWrapping(DWRITE_WORD_WRAPPING_NO_WRAP);
	}
	else
	{
		m_pFont->_getTextFormat()->SetWordWrapping(DWRITE_WORD_WRAPPING_WRAP);
	}
	
	// <20><>ȡ TextLayout
	IDWriteTextLayout * pDWriteTextLayout = nullptr;

	HRESULT hr = GetDirectWriteFactory()->CreateTextLayout(
		m_sText.c_str(),
		UINT32(m_sText.size()),
		m_pFont->_getTextFormat(),
		m_bWordWrapping ? m_fWordWrappingWidth : 0,
		0,
		&pDWriteTextLayout
	);

	ASSERT(SUCCEEDED(hr), "Create IDWriteTextFormat Failed!");

	// <20><>ȡ<EFBFBD>ı<EFBFBD><C4B1><EFBFBD><EFBFBD>ֵĿ<D6B5><C4BF>Ⱥ͸߶<CDB8>
	DWRITE_TEXT_METRICS metrics;
	pDWriteTextLayout->GetMetrics(&metrics);

	this->_setSize(metrics.widthIncludingTrailingWhitespace, metrics.height);
	m_fWordWrappingWidth = metrics.widthIncludingTrailingWhitespace;

	// ɾ<><C9BE><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Դ
	SafeReleaseInterface(&pDWriteTextLayout);
}