QT--3

 Qt

1>将文本编辑器完整实现

#include "widget.h"
#include "ui_widget.h"

Widget::Widget(QWidget *parent)
    : QWidget(parent)
    , ui(new Ui::Widget)
{
    ui->setupUi(this);
    this->resize(800,600);
    edit1 = new QTextEdit(this);
    edit1->resize(600,600);
    //字体
    btnziti = new QPushButton("字体",this);
    btnziti->resize(150,50);
    btnziti->move(625,50);
    //颜色
    btncolor = new QPushButton("颜色",this);
    btncolor->resize(150,50);
    btncolor->move(625,125);
    //打开文件
    btnopen = new QPushButton("打开文件",this);
    btnopen->resize(150,50);
    btnopen->move(625,200);
    //保存文件
    btnsave = new QPushButton("保存文件",this);
    btnsave->resize(150,50);
    btnsave->move(625,275);
    connect(btnziti,&QPushButton::clicked,[=](){
        bool ok = false;
        QFont f = QFontDialog::getFont(&ok,QFont("宋体",10,10,true),this,"选择字体");
        if(ok)
        {
            edit1->setCurrentFont(f);
        }
    });
    connect(btncolor,&QPushButton::clicked,[=](){

        QColor c = QColorDialog::getColor(QColor("red"),this,"选择颜色");
        if(c.isValid() == true)
        {
            edit1->setTextBackgroundColor(c);
        }
    });
    connect(btnopen,&QPushButton::clicked,this,&Widget::openfile);
    connect(btnsave,&QPushButton::clicked,this,&Widget::savefile);
}

Widget::~Widget()
{
    delete ui;
}

void Widget::openfile()
{
    QString filename = QFileDialog::getOpenFileName(this,"选择文件","./","all(*.*)");
    QFile file(filename);
    if(file.open(QFile::ReadOnly)==false)
    {
        QMessageBox::information(this,"提示","文件打开失败");
        return;
    }
    QByteArray msg = file.readAll();
    edit1->setText(msg);
    file.close();
}

void Widget::savefile()
{
    QString filename = QFileDialog::getOpenFileName(this,"选择文件","./","all(*.*)");
    QFile file(filename);
    if(file.open(QFile::WriteOnly)==false)
    {
        QMessageBox::information(this,"提示","文件打开失败");
        return;
    }
    QString msg = edit1->toPlainText();
    file.write(msg.toUtf8().data());
    file.close();
}

2>重新将登录框实现完整

#include "widget.h"
#include "ui_widget.h"


Widget::Widget(QWidget *parent)
    : QWidget(parent)
{
    //=======窗口相关设置======
    this->resize(680,520);
    this->setFixedSize(680,520);
    this->setWindowTitle("Tim");
    this->setWindowFlag(Qt::FramelessWindowHint);
    this->setStyleSheet("background-color:rgb(255,255,255)");

    //=======标签相关设置======
    QLabel *lab1 = new QLabel(this);
    lab1->resize(400,520);
    lab1->setPixmap(QPixmap(":/pictrue/tim.png"));

    //=======行编辑器相关设置=======
    edit1 = new QLineEdit(this);
    edit1->resize(220,50);
    edit1->move(430,270-50);
    edit1->setPlaceholderText("QQ号码/手机号/邮箱");

    edit2 = new QLineEdit(this);
    edit2->resize(220,50);
    edit2->move(430,270);
    edit2->setPlaceholderText("密码");
    edit2->setEchoMode(QLineEdit::Password);

    //=======按钮相关设置=====
    QPushButton *btn1 = new QPushButton(this);
    btn1->resize(64,64);
    btn1->move(500-32,120-32);
    btn1->setStyleSheet("background-color:rgb(17,145,255);border-radius:32px");
    btn1->setIcon(QIcon(":\\pictrue\\qie.png"));

    QPushButton *btn2 = new QPushButton(this);
    btn2->resize(64,64);
    btn2->move(580-32,120-32);
    btn2->setStyleSheet("background-color:rgb(245,245,245);border-radius:32px");
    btn2->setIcon(QIcon(":\\pictrue\\wechat.png"));

    QPushButton *btn3 = new QPushButton("记住密码",this);
    btn3->resize(74,25);
    btn3->move(430,440);
    btn3->setIcon(QIcon(":\\pictrue\\kuang.png"));

    QPushButton *btn4 = new QPushButton("自动登陆",this);
    btn4->resize(74,25);
    btn4->move(430,470);
    btn4->setIcon(QIcon(":\\pictrue\\kuang.png"));

    QPushButton *btn5 = new QPushButton("找回密码",this);
    btn5->resize(74,25);
    btn5->move(600,440);

    QPushButton *btn6 = new QPushButton("注册密码",this);
    btn6->resize(74,25);
    btn6->move(600,470);

    btn7 = new QPushButton(this);
    btn7->resize(25,25);
    btn7->move(640,12);
    btn7->setIcon(QIcon(":\\pictrue\\x.png"));

    QPushButton *btn8 = new QPushButton(this);
    btn8->resize(25,25);
    btn8->move(605,12);
    btn8->setIcon(QIcon(":\\pictrue\\set.png"));

    btn9 = new QPushButton("登录",this);
    btn9->resize(220,50);
    btn9->move(430,270+80);

 //   btn9->setStyleSheet("background-color:red;border-radius:5px");
    connect(edit1, &QLineEdit::textChanged, this, &Widget::mySlots);
    connect(edit2, &QLineEdit::textChanged, this, &Widget::mySlots);
    connect(btn7, &QPushButton::clicked, this, &Widget::clicked);
    connect(btn9, &QPushButton::clicked, [&](){
                if(edit1->text()=="123456"&&edit2->text()=="123456")
                {
                    int res = QMessageBox::information(this,"登录","登录成功",QMessageBox::Ok,QMessageBox::Ok);
                    if(res == QMessageBox::Ok)
                    {
                        emit jump();
                        this->close();
                    }
//                    qDebug() << "denglu" ;
//                    emit jump();
//                    this->close();
                }
                else
                {
                    QMessageBox box(QMessageBox::Critical,"问题","登录失败，是否重新登录",QMessageBox::Ok|QMessageBox::No,this);
                    box.setButtonText(QMessageBox::No,"no");
                    box.setButtonText(QMessageBox::Ok,"yes");
                    int res = box.exec();
                    if(res == QMessageBox::Ok)
                    {
                        edit1->clear();
                        edit2->clear();
                    }
                    else if(res == QMessageBox::No)
                    {
                        this->close();
                    }
                }

       });
}
Widget::~Widget()
{
    delete ui;
}
void Widget::clicked()
{
    QMessageBox box(QMessageBox::Question,"问题","您是否确认退出登录",QMessageBox::Ok|QMessageBox::No,this);
    box.setButtonText(QMessageBox::No,"no");
    box.setButtonText(QMessageBox::Ok,"yes");
    int res = box.exec();
    if(res == QMessageBox::Ok)
    {
        this->close();
    }
    else if(res == QMessageBox::No)
    {

    }

}
void Widget::mySlots()
{
    if(edit1->text().size()>=6&&edit2->text().size()>=6)
    {
        btn9->setEnabled(true);
//        btn9->setStyleSheet("background-color:green;border-radius:5px");
    }
    else
    {
        btn9->setEnabled(false);
//        btn9->setStyleSheet("background-color:red;border-radius:5px");
    }
}

#include "second.h"
#include "ui_second.h"

void Second::fun()
{
    this->show();
}

Second::Second(QWidget *parent) :
    QWidget(parent),
    ui(new Ui::Second)
{
    ui->setupUi(this);
}

Second::~Second()
{
    delete ui;
}