QT-05-qt QTextEdit控件测试 （文本字体 及粘贴板的使用）

#include "mainwindow.h" #include "ui_mainwindow.h" #include "QMenu" #include "QAction" #include"QFontComboBox" #include"QFile" #include"QFileDialog" #include "QClipboard" #include "QSlider" #include "QDebug" #include "QColorDialog" MainWindow::MainWindow(QWidget *parent) : QMainWindow(parent), ui(new Ui::MainWindow) { ui->setupUi(this); QAction *aOpen = new QAction("Open（打开文本）"); QAction *aSave = new QAction("Save（保存下面的文字）"); QAction *aCopy = new QAction("Copy（复制选中内容）"); QAction *aPaste = new QAction("Paste"); QAction *aColor = new QAction("Color"); aSave->setIcon(QIcon(":/save.png")); aColor->setIcon(QIcon(":/color1.png")); //菜单栏 QMenu *m1 = menuBar()->addMenu("TEST"); m1->addAction(aOpen); m1->addAction(aSave); m1->addAction(aCopy); m1->addAction(aPaste); m1->addAction(aColor); //工具栏 QFontComboBox *fc = new QFontComboBox; QSlider *sl = new QSlider; fc->setMaximumWidth(100); sl->setOrientation(Qt::Horizontal); sl->setRange(10,150); sl->setValue(30); sl->setMaximumWidth(150); QToolBar *settool = addToolBar("设置"); settool->addAction(aColor); settool->addWidget(fc); settool->addWidget(sl); connect(sl,QSlider::valueChanged,[=]{ QFont ft = ui->te->font(); ft.setPointSize(sl->value()); ui->te->setFont(ft); }); connect(fc,QFontComboBox::currentFontChanged,[=]{ QFont ft = ui->te->font(); QFont ft2 = fc->currentFont(); ft.setFamily(ft2.family()); ui->te->setFont(ft); }); connect(aCopy,QAction::triggered,[&]{ QClipboard* clipboard = QApplication::clipboard(); QString t = ui->te->textCursor().selectedText(); clipboard->setText(t) ; }); connect(aPaste,QAction::triggered,[&]{ QClipboard* clipboard = QApplication::clipboard(); QString s = clipboard->text(QClipboard::Clipboard); if(s.isEmpty() == false) ui->te->textCursor().insertText(s); }); connect(aColor,SIGNAL(triggered()),this,SLOT(setcolor())); connect(aOpen,SIGNAL(triggered()),this,SLOT(openFile())); connect(aSave,SIGNAL(triggered()),this,SLOT(savefile())); ui->te->setText(" 1.点击颜色图标 可以修改选中及后续输入文字的颜色 或者点击TEST" "颜色 同样可以修改字体颜色\n" " 2.字体可以通过选择字体栏修改\n" " 3.问题大小通过滑块修改"); } void MainWindow::openFile() { QString s = QFileDialog::getOpenFileName(); if(s.isEmpty()) return; QFile f(s); f.open(QIODevice::ReadOnly); QByteArray buf = f.readAll(); f.close(); ui->te->setText(buf); } void MainWindow::savefile() { QString s = QFileDialog::getSaveFileName(); QString buf = ui->te->toPlainText(); QFile f(s); f.open(QIODevice::ReadWrite); f.write(buf.toUtf8()); f.close(); } void MainWindow::setcolor() { QColor cl = QColorDialog::getColor(); if(cl.isValid()) ui->te->setTextColor(cl); } MainWindow::~MainWindow() { delete ui; }