QT-day3

完成文本编辑器的保存工作

void Widget::on_savebton_clicked()
{QString fileName = QFileDialog::getSaveFileName(this,"保存","./","All(*.*);;Images(*.png *.xpm *.jpg);;Text files (*.txt);;XML files (*.xml)");QFile file(fileName);if(!file.isOpen()){if(!file.open(QFile::ReadWrite)){QMessageBox::critical(this,"失败","文件保存失败");}}QString msg = ui->textEdit->toPlainText();file.write((msg.toUtf8()));file.close();}

widget.h

#ifndef WIDGET_H
#define WIDGET_H#include <QWidget>
#include <QTimerEvent>
#include <QTime>
#include <QTextToSpeech>QT_BEGIN_NAMESPACE
namespace Ui { class Widget; }
QT_END_NAMESPACEclass Widget : public QWidget
{Q_OBJECTpublic:Widget(QWidget *parent = nullptr);~Widget();void timerEvent(QTimerEvent *e);private slots:void on_startbtn_clicked();void on_stopbtn_clicked();private:Ui::Widget *ui;int timer_id;int timer_id2;QTextToSpeech *speecher;
};
#endif // WIDGET_H

widget.cpp

#include "widget.h"
#include "ui_widget.h"Widget::Widget(QWidget *parent): QWidget(parent), ui(new Ui::Widget)
{ui->setupUi(this);speecher = new QTextToSpeech(this);ui->lineEdit->setText("10秒读一次");}Widget::~Widget()
{delete ui;
}void Widget::on_startbtn_clicked()
{timer_id = this->startTimer(1000);timer_id2 = this->startTimer(10000);
}void Widget::on_stopbtn_clicked()
{this->killTimer(timer_id);this->killTimer(timer_id2);
}void Widget::timerEvent(QTimerEvent *e)
{if(e->timerId() == timer_id){QTime sys_t = QTime::currentTime();QString t = sys_t.toString("hh:mm:ss");ui->timelab->setText(t);}if(e->timerId() == timer_id2){speecher->say(ui->textEdit->toPlainText());}}

测试结果

思维导图