Qt 设置字体 字号等格式属性

#ifndef FONTSET_H

#define FONTSET_H

#include <QtGui>

class FontSet : public QMainWindow

{

Q_OBJECT

public:

FontSet(QWidget *parent = 0);

QLabel *label1;

QLabel *label2;

QFontComboBox *fontBox;

QComboBox *sizeBox;

QToolButton *boldBtn;

QToolButton *italicBtn;

QToolButton *underBtn;

QToolButton *colorBtn;

void mergeFormat(QTextCharFormat);

public slots:

void slotFont(QString);

void slotSize(QString);

void slotBold();

void slotItalic();

void slotUnder();

void slotColor();

void slotCurrentFormatChanged(const QTextCharFormat &fmt);

private:

QTextEdit *text;

};

#endif // FONTSET_H

/** fontset.cpp

#include "fontset.h"

#include <QtGui>

FontSet::FontSet(QWidget *parent)

: QMainWindow(parent)

{

QFont f("ZYSong18030", 12);

setFont(f);

setWindowTitle(tr("Font"));

QToolBar *toolBar = addToolBar(tr("Font"));

QLabel *label1 = new QLabel(tr("Font: "));

fontBox = new QFontComboBox(toolBar);

fontBox->setFontFilters(QFontComboBox::ScalableFonts);

toolBar->addWidget(label1);

toolBar->addWidget(fontBox);

QLabel *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);

italicBtn = new QToolButton;

italicBtn->setIcon(QIcon(":/images/italic.png"));

italicBtn->setCheckable(true);

toolBar->addWidget(boldBtn);

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::mergeFormat(QTextCharFormat format)

{

QTextCursor cursor = text->textCursor();

if (!cursor.hasSelection())

cursor.select(QTextCursor::WordUnderCursor);

cursor.mergeCharFormat(format);

text->mergeCurrentCharFormat(format);

}

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());

}

/** main.cpp

#include <QApplication>

#include "fontset.h"

int main(int argc, char *argv[])

{

QApplication app(argc,argv);

QTranslator translator;

translator.load("fonts_zh");

app.installTranslator(&translator);

FontSet *t = new FontSet();

t->show();

return app.exec();

}