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