设置字体、字号等格式属性

#include "fontset.h" FontSet::FontSet(QWidget *parent) : QMainWindow(parent) { setWindowTitle(tr("font")); QToolBar * toolBar = addToolBar("Font"); label1 = new QLabel(tr("ZiTi: ")); fontBox = new QFontComboBox(toolBar); fontBox->setFontFilters(QFontComboBox::ScalableFonts); toolBar->addWidget(label1); toolBar->addWidget(fontBox); label2 = new QLabel(tr("number: ")); sizeBox = new QComboBox(toolBar); toolBar->addWidget(label2); toolBar->addWidget(sizeBox); QFontDatabase db; foreach(int size,db.standardSizes()) { sizeBox->addItem(QString::number(size)); } toolBar->addSeparator(); boldBtn = new QToolButton; boldBtn->setIcon(QIcon(":/images/bold.png")); boldBtn->setCheckable(true); toolBar->addWidget(boldBtn); italicBtn = new QToolButton; italicBtn->setIcon(QIcon(":/images/italic.png")); italicBtn->setCheckable(true); toolBar->addWidget(italicBtn); underBtn = new QToolButton; underBtn->setIcon(QIcon(":/images/underline.png")); underBtn->setCheckable(true); toolBar->addWidget(underBtn); toolBar->addSeparator(); colorBtn = new QToolButton; colorBtn->setIcon(QIcon(":/images/color.png")); toolBar->addWidget(colorBtn); text = new QTextEdit(this); text->setFocus(); setCentralWidget(text); connect(fontBox,SIGNAL(activated(QString)),this,SLOT(slotFont(QString))); connect(sizeBox,SIGNAL(activated(QString)),this,SLOT(slotSize(QString))); connect(boldBtn,SIGNAL(clicked()),this,SLOT(slotBold())); connect(italicBtn,SIGNAL(clicked()),this,SLOT(slotItalic())); connect(underBtn,SIGNAL(clicked()),this,SLOT(slotUnder())); connect(colorBtn,SIGNAL(clicked()),this,SLOT(slotColor())); connect(text,SIGNAL(currentCharFormatChanged(const QTextCharFormat&)),this,SLOT(slotCurrentFormatChanged(const QTextCharFormat&))); } void FontSet::slotFont(QString f) { QTextCharFormat fmt; fmt.setFontFamily(f); mergeFormat(fmt); } void FontSet::slotSize(QString num) { QTextCharFormat fmt; fmt.setFontPointSize(num.toFloat()); mergeFormat(fmt); } void FontSet::slotBold() { QTextCharFormat fmt; fmt.setFontWeight(boldBtn->isChecked()? QFont::Bold : QFont::Normal); mergeFormat(fmt); } void FontSet::slotItalic() { QTextCharFormat fmt; fmt.setFontItalic(italicBtn->isChecked()); mergeFormat(fmt); } void FontSet::slotUnder() { QTextCharFormat fmt; fmt.setFontUnderline(underBtn->isChecked()); mergeFormat(fmt); } void FontSet::slotColor() { QColor color = QColorDialog::getColor (Qt::red,this); if(color.isValid()) { QTextCharFormat fmt; fmt.setForeground(color); mergeFormat(fmt); } } //设置光标的选区，使格式作用于选区内的字符，若没有选区则作用于光标所在处的字符 void FontSet::slotCurrentFormatChanged(const QTextCharFormat &fmt) { fontBox->setCurrentIndex(fontBox->findText(fmt.fontFamily())); sizeBox->setCurrentIndex(sizeBox->findText(QString::number(fmt.fontPointSize()))); boldBtn->setChecked(fmt.font().bold()); italicBtn->setChecked(fmt.fontItalic()); underBtn->setChecked(fmt.fontUnderline()); } void FontSet::mergeFormat(QTextCharFormat format) { QTextCursor cursor = text->textCursor(); if(!cursor.hasSelection()) { cursor.select(QTextCursor::WordUnderCursor); } cursor.mergeCharFormat(format); text->mergeCurrentCharFormat(format); }