Qt学习笔记--对话框

Dialog

#include "mywidget.h"
#include "ui_mywidget.h"
#include<QDebug>
#include<QColorDialog>
#include<QFileDialog>
#include<QFontDialog>
#include<QInputDialog>
#include<QMessageBox>
#include<QProgressDialog>
#include<QErrorMessage>
MyWidget::MyWidget(QWidget *parent) :
    QWidget(parent),
    ui(new Ui::MyWidget)
{
    ui->setupUi(this);

  //  errordlg = new QErrorMessage(this);

}

MyWidget::~MyWidget()
{
    delete ui;
}
//颜色对话框
void MyWidget::on_pushButton_clicked()
{
    QColor color =QColorDialog::getColor(Qt::red,this,tr("颜色对话框"),QColorDialog::ShowAlphaChannel);
    qDebug()<<"color:"<<color;
}
//文件对话框
void MyWidget::on_pushButton_5_clicked()
{
    QString filename = QFileDialog::getOpenFileName(this,tr("文件对话框"),"D:",tr("图片文件(*png *jpg)"));
    qDebug()<<"filename"<<filename;
}
//字体对话框
void MyWidget::on_pushButton_2_clicked()
{
    bool ok;
    QFont font = QFontDialog::getFont(&ok,this);

    if(ok) ui->pushButton_2->setFont(font);
    else qDebug()<<tr("没有选择字体");
}
//输入对话框
void MyWidget::on_pushButton_6_clicked()
{
    bool ok;
    QString string = QInputDialog::getText(this,tr("输入字符对话框"),tr("请输入用户名:"),QLineEdit::Normal,tr("admin"),&ok);
    if(ok) qDebug()<<"string"<<string;

    int value1=QInputDialog::getInt(this,tr("输入整数对话框"),tr("请输入-1000到1000之间的数值"),100,-1000,1000,10,&ok);
    if(ok) qDebug()<<"value1:"<<value1;

    int value2=QInputDialog::getInt(this,tr("输入浮点数对话框"),tr("请输入-1000到1000之间的数值"),0.00,-1000,1000,2,&ok);
    if(ok) qDebug()<<"value2:"<<value2;

    QStringList items;
    items<<tr("条目1")<<tr("条目2")<<tr("条目3");

    QString item = QInputDialog::getItem(this,tr("输入条目对话框"),tr("请选择或者输入一个条目"),items,0,true,&ok);
    if(ok) qDebug()<<"item"<<item;
}
//消息对话框
void MyWidget::on_pushButton_3_clicked()
{
    //问题对话框
    int ret1=QMessageBox::question(this,tr("问题对话框"),tr("你了解Qt吗？"),QMessageBox::Yes,QMessageBox::No);
    if(ret1==QMessageBox::Yes) qDebug()<<tr("问题!");
    //提示对话框
    int ret2=QMessageBox::information(this,tr("提示对话框"),tr("这是Qt书籍！"),QMessageBox::Ok);
    if(ret2==QMessageBox::Ok) qDebug()<<tr("提示！");
    //警告对话框
    int ret3=QMessageBox::warning(this,tr("警告对话框"),tr("不能提前结束"),QMessageBox::Abort);
    if(ret3==QMessageBox::Abort) qDebug()<<tr("警告！");
    //错误对话框
    int ret4=QMessageBox::critical(this,tr("错误对话框"),tr("发现一个严重错误！现在要关闭所有文件！"),QMessageBox::YesAll);
    if(ret4==QMessageBox::YesAll) qDebug()<<tr("错误！");
    //关于对话框
    QMessageBox::about(this,tr("关于对话框"),tr("yuanweilin 致力于Qt!"));

}
//进度对话框
void MyWidget::on_pushButton_7_clicked()
{
    QProgressDialog dialog(tr("文件复制进度"),tr("取消"),0,50000,this);
    dialog.setWindowTitle("进度对话框");
    dialog.setWindowModality(Qt::WindowModal);
    dialog.show();

    for(int i=0;i<50000;i++)
    {
        dialog.setValue(i);
        QCoreApplication::processEvents();
        if(dialog.wasCanceled()) break;

    }
        dialog.setValue(50000);
        qDebug()<<tr("复制结束！");
}
/*
void MyWidget::on_pushButton_4_clicked()
{

    errordlg->setWindowTitle(tr("错误信息对话框"));
    errordlg->showMessage(tr("这里是出错信息"));
}
*/