学步园

#include "widget.h"

#include "ui_widget.h"

#include <QDebug>

#include <QString>//for  QString

#include <QMovie> //for  QMovie

#include <QTime>  //for QTime

#include <QPalette> //for palatte

Widget::Widget(QWidget *parent) :

    QWidget(parent),

    ui(new Ui::Widget)

{

    ui->setupUi(this);

    //获得窗口的宽度和高度

    int w = this->width();

    int h = this->height();

    qDebug()<<" w = "<<w

            <<" h = "<<h;

    //重新设置大小

    ui->pushButton->resize(100, 120);

    //获得pushbutton的宽度和高度

    int pw = ui->pushButton->width();

    int ph = ui->pushButton->height();

    qDebug()<<"pw = "<<pw

            <<"ph = "<<ph<<"\n"

            <<__FILE__<<__LINE__<<"\n"

            <<"auto = "<<ui->pushButton->size()<<"\n";

    //获得矩形的坐标

    qDebug()<<"geomtry = "<<ui->pushButton->geometry();

    //单独或者举行长宽信息

    int x = ui->pushButton->geometry().x();

    int y = ui->pushButton->geometry().y();

    qDebug()<<"gemotry x ="<<x

            <<"gemotry y ="<<y;

    //设置pushButton属性，setGeometry

    ui->pushButton->setGeometry(0,0,75,23);

    //获得窗口类对象名

    QString wname = this->objectName();

    qDebug()<<"wname ="<<wname;

    //获得pushbutton 对象名

    QString pname = ui->pushButton->objectName();

    qDebug()<<"pname ="<<pname;

    //隐藏labelText

    ui->label->hide();

    //button设置为非使能

    ui->pushButton->setEnabled(false);

    //显示labeiText

    ui->label->show();

    ui->pushButton->setEnabled(true);

    //******************字符串类 ：QString类字符串处理**************//

    QString str = "123";

    bool ok = false;

    int m = str.toInt(&ok, 16);

    qDebug()<<"str = "<<str<<"m = "<<m

            <<"ok = "<<ok;

    str = QString::number(m, 16);                               //16代表待转换的数为16进制

    qDebug()<<"m to str = "<<str;

    str.append("abc");

    qDebug()<<"after str.append(abc)"<<str;                     //将字符串连接起来

    str += "QT" ;                                               //用运算符重载将字符串连接

    qDebug()<<"+= QT"<<str;

    QString str2;

    str2 = QString("**%1##%2&&%3").arg(m).arg(str).arg(" !!!!");//QString类似sprinf的用法  %1%2%3将

                                                                //引用后边的1，2，3数据

    qDebug()<<"str2 = "<<str2;

    //************************QLabel**********************//

    ui->label->setText("<a href = www.baidu.com>abcdefg</a>");  //设置显示的标签

    QString text = ui->label->text();

    qDebug()<<"label text = "<<text;

    ui->label->setPixmap(QPixmap("../image/boy.gif"));

    //<a herf="链接地址"><img src="图片地址"></ a>

    ui->label->setScaledContents(true);

    //设置动画  move  需要包含头文件 QMovie

    movie = new QMovie;                                         //定义一个movie的类  注意析构函数中是否有删除空间

    movie->setFileName("../image/boy.gif");                      //设置文件的名字

    ui->label_2->setScaledContents(true);                       //自动适应大小

    ui->label_2->setMovie(movie);

    movie->start();                                             //movie启动播放

    /**********************QPushButton*******************************/

    ui->pushButton->setGeometry(QRect(0,0,80,50));

    ui->pushButton->setText("ensure");

    qDebug()<<"buton text"<<ui->pushButton->text();

    ui->pushButton->setIcon(QIcon("../image/wright.png"));      //QIcon  构造一个icon的类

    ui->pushButton->setIconSize(QSize(30,30));                  //设置图片的大小

    /******************************lcdNumber********************************/

    ui->lcdNumber->setDigitCount(5);

    ui->lcdNumber->setNumDigits(5);//

    ui->lcdNumber->display(45.66);                              //显示

    //ui->lcdNumber->display("abcd");

    //progress bar   进度条

    ui->progressBar->setMinimum(0);                             //最大最小值设置

    ui->progressBar->setMaximum(200);

    ui->progressBar->setValue(200);                             //显示数值自动计算百分比

    /*************************下拉组合框comboBox******************************/

    QString currText;

    currText = ui->comboBox->currentText();

    int index  = ui->comboBox->currentIndex();

    qDebug()<<"currText = "<<currText<<"\nIndex"<<index;

    ui->comboBox->setCurrentIndex(1);

    ui->comboBox->setMaxCount(120);//最大的项

    currText = ui->comboBox->currentText();

    index  = ui->comboBox->currentIndex();

    qDebug()<<"currText = "<<currText<<"\nIndex"<<index;

    ui->comboBox->insertItem(5,"666666");

    //获得密码

    qDebug()<<"lineEdit ="<<ui->lineEdit->text();

    //设置字符

    ui->lineEdit->setText("qqqqqqqq");

    //追加字符

    ui->lineEdit->insert("ttt");

    //设置文本显示方式

    ui->lineEdit->setEchoMode(QLineEdit::Password);//Echo是枚举类型 可以直接写枚举的值，也可以引用

    //ui->lineEdit->setReadOnly(true);//设置只读模式

    //qDebug()<<ui->lineEdit->isReadOnly();

    //textEdit 文本编辑框

    ui->textEdit->setTextColor(Qt::red);    //QColor(0xffff) Qt::red QColor(0, 255 0)设置颜色的几种方式

    ui->textEdit->setText("hello QT!");     //

    ui->textEdit->setTextColor(QColor(0,255,255));

    ui->textEdit->setFontPointSize(20);

    ui->textEdit->append("adfajsd");        //追加文本  换行

    ui->textEdit->setFontPointSize(40);     //设置字体的字号

    ui->textEdit->append("sdfadsfa");

    // 获得一个随机数

    qsrand(QTime(0,0,0).secsTo(QTime::currentTime()));//从0时0分0秒到当前时间的秒数

    int t = qrand();

    ui->lcdNumber->display(t);

    //通过代码修改前景色，背景色

    QPalette p;

    p.setColor(QPalette::Window, Qt::blue);//大写Windows 表示数据是个变量

    p.setColor(QPalette::Window, Qt::red);

    ui->lcdNumber->setPalette(p);

    this->setPalette(p);

    ui->lcdNumber->setAutoFillBackground(true);

    //通过代码修改资源图片

    ui->label_2->setGeometry(100, 20, 200, 50);

    ui->label_2->setScaledContents(true);

    ui->label_2->setPixmap(QPixmap(":/new/prefix1/qq1.jpg"));

}

Widget::~Widget()

{

    delete ui;

    delete movie;//

}