C++ Theme::spacingBelowParagraph方法代码示例

//.........这里部分代码省略.........
	switch (m_theme.lineSpacing()) {
	case 100: m_line_spacing_type->setCurrentIndex(0); break;
	case 150: m_line_spacing_type->setCurrentIndex(1); break;
	case 200: m_line_spacing_type->setCurrentIndex(2); break;
	default: m_line_spacing->setEnabled(true); break;
	}
	connect(m_line_spacing_type, SIGNAL(currentIndexChanged(int)), this, SLOT(lineSpacingChanged(int)));
	connect(m_line_spacing_type, SIGNAL(currentIndexChanged(int)), this, SLOT(renderPreview()));
	connect(m_line_spacing, SIGNAL(valueChanged(int)), this, SLOT(renderPreview()));

	QFormLayout* line_spacing_layout = new QFormLayout(line_spacing);
	line_spacing_layout->setFieldGrowthPolicy(QFormLayout::FieldsStayAtSizeHint);
	line_spacing_layout->addRow(tr("Type:"), m_line_spacing_type);
	line_spacing_layout->addRow(tr("Height:"), m_line_spacing);


	// Create paragraph spacing group
	QGroupBox* paragraph_spacing = new QGroupBox(tr("Paragraph Spacing"), contents);

	m_tab_width = new QSpinBox(paragraph_spacing);
	m_tab_width->setSuffix(tr(" pixels"));
	m_tab_width->setRange(theme.tabWidth().minimumValue(), theme.tabWidth().maximumValue());
	m_tab_width->setValue(m_theme.tabWidth());
	connect(m_tab_width, SIGNAL(valueChanged(int)), this, SLOT(renderPreview()));

	m_spacing_above_paragraph = new QSpinBox(paragraph_spacing);
	m_spacing_above_paragraph->setSuffix(tr(" pixels"));
	m_spacing_above_paragraph->setRange(theme.spacingAboveParagraph().minimumValue(), theme.spacingAboveParagraph().maximumValue());
	m_spacing_above_paragraph->setValue(m_theme.spacingAboveParagraph());
	connect(m_spacing_above_paragraph, SIGNAL(valueChanged(int)), this, SLOT(renderPreview()));

	m_spacing_below_paragraph = new QSpinBox(paragraph_spacing);
	m_spacing_below_paragraph->setSuffix(tr(" pixels"));
	m_spacing_below_paragraph->setRange(theme.spacingBelowParagraph().minimumValue(), theme.spacingBelowParagraph().maximumValue());
	m_spacing_below_paragraph->setValue(m_theme.spacingBelowParagraph());
	connect(m_spacing_below_paragraph, SIGNAL(valueChanged(int)), this, SLOT(renderPreview()));

	m_indent_first_line = new QCheckBox(tr("Indent first line"), paragraph_spacing);
	m_indent_first_line->setChecked(m_theme.indentFirstLine());
	connect(m_indent_first_line, SIGNAL(toggled(bool)), this, SLOT(renderPreview()));

	QFormLayout* paragraph_spacing_layout = new QFormLayout(paragraph_spacing);
	paragraph_spacing_layout->setFieldGrowthPolicy(QFormLayout::FieldsStayAtSizeHint);
	paragraph_spacing_layout->addRow(tr("Tab Width:"), m_tab_width);
	paragraph_spacing_layout->addRow(tr("Above:"), m_spacing_above_paragraph);
	paragraph_spacing_layout->addRow(tr("Below:"), m_spacing_below_paragraph);
	paragraph_spacing_layout->addRow("", m_indent_first_line);


	// Create preview
	m_preview_text = new QTextEdit;
	m_preview_text->setFrameStyle(QFrame::NoFrame);
	m_preview_text->setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
	m_preview_text->setVerticalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
	QFile file(":/lorem.txt");
	if (file.open(QFile::ReadOnly)) {
		m_preview_text->setPlainText(QString::fromLatin1(file.readAll()));
		file.close();
	}

	m_preview = new QLabel(this);
	m_preview->setAlignment(Qt::AlignCenter);
	m_preview->setFrameStyle(QFrame::Sunken | QFrame::StyledPanel);

	QPixmap pixmap(480, 270);
	pixmap.fill(palette().window().color());

void ThemeDialog::renderPreview(QImage preview, const QRect& foreground, const Theme& theme)
{
	m_load_color = QtConcurrent::run(averageImage, theme.backgroundImage(), theme.backgroundColor());

	// Position preview text
	int padding = theme.foregroundPadding();
	int x = foreground.x() + padding;
	int y = foreground.y() + padding + theme.spacingAboveParagraph();
	int width = foreground.width() - (padding * 2);
	int height = foreground.height() - (padding * 2) - theme.spacingAboveParagraph();
	m_preview_text->setGeometry(x, y, width, height);

	// Set colors
	QColor text_color = theme.textColor();
	text_color.setAlpha(255);

	QPalette p = m_preview_text->palette();
	p.setBrush(QPalette::Base, preview.copy(x, y, width, height));
	p.setColor(QPalette::Text, text_color);
	p.setColor(QPalette::Highlight, text_color);
	p.setColor(QPalette::HighlightedText, (qGray(text_color.rgb()) > 127) ? Qt::black : Qt::white);
	m_preview_text->setPalette(p);

	// Set spacings
	int tab_width = theme.tabWidth();
	QTextBlockFormat block_format;
	block_format.setLineHeight(theme.lineSpacing(), (theme.lineSpacing() == 100) ? QTextBlockFormat::SingleHeight : QTextBlockFormat::ProportionalHeight);
	block_format.setTextIndent(tab_width * theme.indentFirstLine());
	block_format.setTopMargin(theme.spacingAboveParagraph());
	block_format.setBottomMargin(theme.spacingBelowParagraph());
	m_preview_text->textCursor().mergeBlockFormat(block_format);
	for (int i = 0, count = m_preview_text->document()->allFormats().count(); i < count; ++i) {
		QTextFormat& f = m_preview_text->document()->allFormats()[i];
		if (f.isBlockFormat()) {
			f.merge(block_format);
		}
	}
	m_preview_text->setTabStopWidth(tab_width);
	m_preview_text->document()->setIndentWidth(tab_width);

	// Set font
	m_preview_text->setFont(theme.textFont());

	// Render text
	m_preview_text->render(&preview, m_preview_text->pos());

	// Create zoomed text cutout
	int x2 = (x >= 24) ? (x - 24) : 0;
	int y2 = (y >= 24) ? (y - 24) : 0;
	QImage text_cutout = preview.copy(x2, y2, 162, 110);

	// Create preview icon
	m_preview_icon = QImage(":/shadow.png").convertToFormat(QImage::Format_ARGB32_Premultiplied);
	{
		QPainter painter(&m_preview_icon);
		painter.drawImage(9, 9, preview.scaled(240, 135, Qt::KeepAspectRatio, Qt::SmoothTransformation));
		painter.fillRect(20, 32, 85, 59, QColor(0, 0, 0, 32));
		painter.fillRect(21, 33, 83, 57, Qt::white);
		int x3 = (x >= 24) ? (x - 12 + theme.tabWidth()) : 12 + theme.tabWidth();
		int y3 = (y >= 24) ? (y - 6) : 0;
		painter.drawImage(22, 34, preview, x3, y3, 81, 55);
	}

	// Create preview pixmap
	preview = preview.scaled(480, 270, Qt::KeepAspectRatio, Qt::SmoothTransformation);
	{
		QPainter painter(&preview);
		painter.setPen(Qt::NoPen);
		painter.fillRect(22, 46, 170, 118, QColor(0, 0, 0, 32));
		painter.fillRect(24, 48, 166, 114, Qt::white);
		painter.drawImage(26, 50, text_cutout);
	}
	m_preview->setPixmap(QPixmap::fromImage(preview));
}