完成文本编辑器的保存工作
.cpp
cpp
#include "mainwindow.h"
#include "ui_mainwindow.h"
MainWindow::MainWindow(QWidget *parent)
: QMainWindow(parent)
, ui(new Ui::MainWindow)
{
ui->setupUi(this);
}
MainWindow::~MainWindow()
{
delete ui;
}
void MainWindow::on_fontBtn_clicked()
{
bool ok;//返回用户是否选中字体
QFont f=QFontDialog::getFont(&ok,QFont("隶书",10,10,false),
this,"选择字体");
//对ok进行判断，判断用户是否选中字体了
if(ok)
{
//用户选中字体了
//将选中的字体，设置到文字上
//ui->textEdit->setFont(f);//设置全部字体文字
ui->textEdit->setCurrentFont(f);//设置选中的字体字体
}
else
{
//用户取消了选中字体
QMessageBox::information(this,"取消","用户取消的选择字体");
}
}
//颜色对话框对应的槽函数
void MainWindow::on_colorBtn_clicked()
{
QColor c=QColorDialog::getColor(QColor("green"),//初始颜色
this,
"选择颜色");
//判断c的合法性
if(c.isValid())
{
//用户选择的颜色
//将用户选择的颜色作业到文本上
ui->textEdit->setTextColor(c);//设置选中的颜色
//ui->textEdit->setTextBackgroundColor(c); //设置背景颜色
}else
{
QMessageBox::information(this,"取消","用户取消的选择颜色");
}
}
//打开按钮找到的槽函数
void MainWindow::on_openBtn_clicked()
{
QString fileName =QFileDialog::getOpenFileName(this,
"选择文件",
"./",
"All(*.*);;Image(*.png *.xpm *.jpg);; "
"Text files (*.txt);;files(*.xml)");
//判断是否选中文件
if(fileName.isNull())
{
QMessageBox::information(this,"提示","用户取消了选中文件");
return;
}
qDebug()<<fileName;//得到文件路径
//文件操作
//1.实例化
QFile file(fileName);
//打开文件
if(!file.isOpen())//该文件没有被打开则打开文件
{
//调用打开文件操作
if(!file.open(QFile::ReadWrite))
{
QMessageBox::critical(this,"失败","文件打开失败");
return;
}
}
//3.读写内容
QByteArray msg=file.readAll();
//4.关闭文件
file.close();
//将读取的文本展示在ui界面
ui->textEdit->setText(msg);
}
//文件保存槽函数
void MainWindow::on_saveBtn_clicked()
{
QString fileName = QFileDialog::getSaveFileName(this, //父组件
"保存文件", //对话框标题
"./", //起始路径
"all file(*.*);;Text(*.txt);;Image(*.png,*.jpg,*.gif)"); //过滤器
//判断是否选中文件
if(fileName.isNull())
{
QMessageBox::information(this,"提示","用户取消了选中文件");
return;
}
qDebug()<<fileName;//得到文件路径
//文件操作
//1.实例化
QFile file(fileName);
//2.打开文件
if(!file.open(QFile::Append))//该文件没有被打开则打开文件
{
return;
}
//3.获取textEdit中的内容
QString msg=ui->textEdit->toPlainText();
//4.textEdit将内容写入
file.write(msg.toLocal8Bit());
//关闭文件
file.close();
}.h
cpp
#ifndef MAINWINDOW_H
#define MAINWINDOW_H
#include <QMainWindow>
#include<QWidget>
#include<QFont>
#include<QMessageBox>
#include<QFontDialog>
#include<QColor>//属于颜色类
#include<QColorDialog>
#include<QFileDialog>
#include<QFile>
#include<QDebug>
QT_BEGIN_NAMESPACE
namespace Ui { class MainWindow; }
QT_END_NAMESPACE
class MainWindow : public QMainWindow
{
Q_OBJECT
public:
MainWindow(QWidget *parent = nullptr);
~MainWindow();
private slots:
void on_fontBtn_clicked();
void on_colorBtn_clicked();
void on_openBtn_clicked();
void on_saveBtn_clicked();
private:
Ui::MainWindow *ui;
};
#endif // MAINWINDOW_H
.cpp
cpp
#include "widget.h"
#include "ui_widget.h"
Widget::Widget(QWidget *parent)
: QWidget(parent)
, ui(new Ui::Widget)
{
ui->setupUi(this);
this->timer=new QTimer;
timeid=startTimer(100);
//尺寸
this->setFixedSize(800,600);
//更改标题
this->setWindowTitle("闹钟");
//连接定时器信号和自定义的槽函数
connect(timer,&QTimer::timeout,this,&Widget::LCD_Show);
}
Widget::~Widget()
{
delete ui;
}
//启动的槽函数
void Widget::on_upBtn_clicked()
{
timer->start(100);
ui->pushtime->setReadOnly(true);
ui->textt->setReadOnly(true);
}
void Widget::LCD_Show()
{
if(ui->pushtime->text()==ui->nowtime->text())
{
speech =new QTextToSpeech(this);
QString text=ui->textt->toPlainText();
//qDebug()<<text;
speech->say(text);
}
}
//定时器事件处理函数
void Widget::timerEvent(QTimerEvent *e)
{
if(e->timerId()==timeid)
{
QDateTime sysDateTime=QDateTime::currentDateTime();
//讲QTime类对象转化为字符串
QString t=sysDateTime.toString("hh:mm:ss");
//展示到ui界面
ui->nowtime->setText(t);
}
}
//停止的槽函数
void Widget::on_downBtn_clicked()
{
QMessageBox box(QMessageBox::Warning,"Warning","是否要重设闹钟",QMessageBox::Yes|QMessageBox::No);
int ret = box.exec();
if(ret==QMessageBox::Yes)
{
//关闭定时器
timer->stop();
//定时器关闭后行编辑器和文本编辑器重新有效
ui->pushtime->setReadOnly(false);
ui->textt->setReadOnly(false);
//清空之前设置的行文本编辑器
ui->pushtime->clear();
//停止语音播报
speech->stop();
}
}.h
cpp
#ifndef WIDGET_H
#define WIDGET_H
#include <QWidget>
#include <QTimer>
#include <QTime>
#include <QTimerEvent>
#include <QDebug>
#include <QTextToSpeech>
#include <QMessageBox>
QT_BEGIN_NAMESPACE
namespace Ui { class Widget; }
QT_END_NAMESPACE
class Widget : public QWidget
{
Q_OBJECT
public:
Widget(QWidget *parent = nullptr);
~Widget();
void timerEvent(QTimerEvent *event)override;
//void paintEvent(QPaintEvent *event) override;
private slots:
void on_upBtn_clicked();
void on_downBtn_clicked();
void LCD_Show();
private:
Ui::Widget *ui;
QTimer *timer;//显示屏显示时间
int timeid;//定义闹钟定时器
//定义文本输入框的播报者
QTextToSpeech *speech;
};
#endif // WIDGET_H.pro
cpp
QT += core gui texttospeech
greaterThan(QT_MAJOR_VERSION, 4): QT += widgets
CONFIG += c++11
# The following define makes your compiler emit warnings if you use
# any Qt feature that has been marked deprecated (the exact warnings
# depend on your compiler). Please consult the documentation of the
# deprecated API in order to know how to port your code away from it.
DEFINES += QT_DEPRECATED_WARNINGS
# You can also make your code fail to compile if it uses deprecated APIs.
# In order to do so, uncomment the following line.
# You can also select to disable deprecated APIs only up to a certain version of Qt.
#DEFINES += QT_DISABLE_DEPRECATED_BEFORE=0x060000 # disables all the APIs deprecated before Qt 6.0.0
SOURCES += \
main.cpp \
widget.cpp
HEADERS += \
widget.h
FORMS += \
widget.ui
# Default rules for deployment.
qnx: target.path = /tmp/$${TARGET}/bin
else: unix:!android: target.path = /opt/$${TARGET}/bin
!isEmpty(target.path): INSTALLS += target