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 = );
         ~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"), , -, , , &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, -, , , &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, , 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"), , , this);
         dialog.setWindowTitle(tr("进度对话框"));
         dialog.setWindowModality(Qt::WindowModal);
         dialog.show();

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

         dialog.setValue();
         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