Qt对话框部分学习

一、对话框部分常用内容
颜色对话框、文件对话框、字体对话框、输入对话框、消息对话框、进度对话框、错误对话框、向导对话框。

二、代码部分

 

     //widget.h
    #ifndef MYWIDGET_H
    #define MYWIDGET_H

    #include <QWidget>
    #include <QWizard>

    namespace Ui {
    class MyWidget;
    }

    class MyWidget : public QWidget
    {
        Q_OBJECT

    public:
        explicit MyWidget(QWidget *parent = 0);
        ~MyWidget();

    private slots:
        void on_pushButton_clicked();

        void on_pushButton_4_clicked();

        void on_pushButton_2_clicked();

        void on_pushButton_5_clicked();

        void on_pushButton_3_clicked();

        void on_pushButton_6_clicked();

        void on_pushButton_7_clicked();

        void on_pushButton_8_clicked();

    private:
        Ui::MyWidget *ui;
        QWizardPage *createPage1();
        QWizardPage *createPage2();
        QWizardPage *createPage3();
    };

    #endif // MYWIDGET_H


    //widget.cpp
    #include "mywidget.h"
    #include "ui_mywidget.h"
    #include <QDebug>
    #include <QColorDialog>
    #include <QFileDialog>
    #include <QFontDialog>
    #include <QInputDialog>
    #include <QMessageBox>
    #include <QProgressDialog>
    #include <QErrorMessage>
    #include <QWizard>

    MyWidget::MyWidget(QWidget *parent) :
        QWidget(parent),
        ui(new Ui::MyWidget)
    {
        ui->setupUi(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;
        QColorDialog dialog(Qt::red, this);
        dialog.setOption(QColorDialog::ShowAlphaChannel);
        dialog.exec();
        QColor color = dialog.currentColor();
        qDebug()<<"color:"<<color;

    }

    //文本对话框
    void MyWidget::on_pushButton_4_clicked()
    {
        QString filename = QFileDialog::getOpenFileName(this, tr("文件对话框"), "E:", tr("文本文件(*txt)"));
        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_5_clicked()
    {
        bool ok;
        QString string = QInputDialog::getText(this, tr("输入字符串对话框"),
                        tr("请输入用户名："), QLineEdit::Normal, tr("admin"), &ok);
        if(ok) qDebug()<<"string:"<<string;
        //获取整数
        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;
        //获取浮点数
        double value2 = QInputDialog::getDouble(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");
        //获取条目
        QString item = QInputDialog::getItem(this, tr("输入条目对话框"),
                        tr("请选择一个条目"), 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("严重错误对话框"),
                         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("yafeilinux.com致力于Qt及Qt Creator的普及工作！"));
    }

    //进度对话框
    void MyWidget::on_pushButton_6_clicked()
    {
        QProgressDialog dialog(tr("文件复制进度"), tr("取消"), 0, 50000, this);
        dialog.setWindowTitle(tr("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！");
    }

    //错误对话框
    void MyWidget::on_pushButton_7_clicked()
    {
        QErrorMessage *dialog = new QErrorMessage(this);
        dialog->setWindowTitle(tr("错误信息对话框"));
        dialog->showMessage(tr("这里是出错信息！"));
    }

    QWizardPage *MyWidget::createPage1()
    {
        QWizardPage *page = new QWizardPage;
        page->setTitle(tr("介绍"));
        return page;
    }

    QWizardPage *MyWidget::createPage2()
    {
        QWizardPage *page = new QWizardPage;
        page->setTitle(tr("用户选择信息"));
        return page;
    }

    QWizardPage *MyWidget::createPage3()
    {
        QWizardPage *page = new QWizardPage;
        page->setTitle(tr("结束"));
        return page;
    }

    //相对对话框
    void MyWidget::on_pushButton_8_clicked()
    {
        QWizard wizard(this);
        wizard.setWindowTitle(tr("向导对话框"));
        wizard.addPage(createPage1());
        wizard.addPage(createPage2());
        wizard.addPage(createPage3());
        wizard.exec();
    }

main.cpp:

    #include "mywidget.h"
    #include <QApplication>

    int main(int argc, char *argv[])
    {
        QApplication a(argc, argv);
        MyWidget w;
        w.show();

        return a.exec();
    }

 

ui样子