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Qt弹框QDialog、QMessageBox、QColorDialog、QFileDialog、QFontDialog、QProcessDialog

一、概述

　　汇总一下Qt中的弹框：QDialog（自定义）、QMessageBox、QColorDialog、QFileDialog、QFontDialog、QProcessDialog

 

二、代码示例及演示效果

　　1.自定义弹框（啥都没有的弹框，如果想要自定义内容，直接继承QDialog进行扩展）

QDialog* dialog = new QDialog;
dialog->setWindowTitle(tr("基础弹框"));
dialog->show();

　　2.选择颜色弹框

复制代码
QPalette pal = edtColor->palette(); //获取现有 palette
QColor  iniColor = pal.color(QPalette::Text); //现有的文字颜色
QColor color = QColorDialog::getColor(iniColor, this, "选择颜色");
qDebug() << "获取颜色";
if (color.isValid()) //选择有效
{
    pal.setColor(QPalette::Text, color); //palette 设置选择的颜色
    edtColor->setPalette(pal); //设置 palette
    //edtColor->setText(color);
}
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　　3.选择文件弹框

QString curPath = QCoreApplication::applicationDirPath(); //获取应用程序的路径
QString dlgTitle = "保存文件"; //对话框标题
QString filter = "文本文件(*.txt);;h文件(*.h);;C++文件(.cpp);;所有文件(*.*)"; //文件过滤器
QString aFileName = QFileDialog::getSaveFileName(this, dlgTitle, curPath, filter);
if (!aFileName.isEmpty())
    edtColor->setText(aFileName);

 

 　　4.字体选择弹框

QFont iniFont = edtColor->font(); //获取文本框的字体
bool   ok = false;
QFont font = QFontDialog::getFont(&ok, iniFont); //选择字体
if (ok) //选择有效
    edtColor->setFont(font);

　　5.基础消息弹框

复制代码
QString dlgTitle = "删除";
QString strInfo = "确定要删除吗？";
QMessageBox::StandardButton result = QMessageBox::information(this, dlgTitle, strInfo,
    QMessageBox::Ok, QMessageBox::No);
if (result == QMessageBox::Ok) {
    qDebug() << "确定";
}
else if (result == QMessageBox::No) {
    qDebug() << "取消";
}
复制代码

 

QString dlgTitle = "警告";
QString strInfo = "刀锋来袭";
QMessageBox::warning(this, dlgTitle, strInfo);

 

QString dlgTitle = "恕瑞玛";
QString strInfo = "恕瑞玛，你的皇帝回来了";
QMessageBox::critical(this, dlgTitle, strInfo);

 

QString dlgTitle = "Tips";
QString strInfo = "德玛西亚万岁";
QMessageBox::about(this, dlgTitle, strInfo);

 　　6.带进度条的弹框

复制代码
pd = new QProgressDialog("当前进度...", "Cancel", 0, 100);
pd->setWindowFlags(Qt::Dialog | Qt::CustomizeWindowHint | Qt::WindowTitleHint);        //不显示进度条上的“最小化”“最大化”“关闭”
pd->setWindowTitle("任务保存");    //窗口标题
pd->setAutoClose(true);        //进度达到最大值时不关闭，默认为true
pd->setLabelText("任务保存中...");    //显示的文本
pd->setRange(0, 100);                //设置进度条的极值，默认为[0,100]
//pd->setCancelButton(NULL);            //不显示取消按钮
pd->show();                        //进度条显示

//std::thread mThread(progressFun, this);
timer->start(20);//开启timer，刷新进度条进度
复制代码

　　创建QTimer并设置事件

复制代码
timer = new QTimer(this);
connect(timer, &QTimer::timeout, this, [=] {
    pd->setValue(steps);
    steps++;
    //终止条件
    if (steps > pd->maximum()) {
        timer->stop();
        steps = 0;
    }
复制代码

 　　7.以下是完整的代码

复制代码
#include "DialogWindow.h"

void progressFun(DialogWindow* window) {
    int i = 0;
    while (i <= 100) {
        std::this_thread::sleep_for(std::chrono::milliseconds(100));
        i++;
        window->pd->setValue(i);
    }
}
void DialogWindow::getValue(int value) {
    qDebug() << "进度条:" << value;
    pd->setValue(value);
}
DialogWindow::DialogWindow(QWidget* parent)
    : QWidget(parent)
{
    this->setWindowTitle("各种弹框");
    this->setFixedSize(320, 480);

    QVBoxLayout* vLayout = new  QVBoxLayout(this);
    QPushButton* btnBaseDialog = new QPushButton(this);
    btnBaseDialog->setFixedHeight(30);
    btnBaseDialog->setText("基础dialog");

    QHBoxLayout* hLayoutColor = new QHBoxLayout(this);
    QPushButton* btnColorDialog = new QPushButton(this);
    btnColorDialog->setFixedHeight(30);
    btnColorDialog->setText("选择颜色");
    edtColor = new QLineEdit(this);
    edtColor->resize(60, 30);
    hLayoutColor->addWidget(edtColor);
    hLayoutColor->addWidget(btnColorDialog);

    QPushButton* btnFileDialog = new QPushButton(this);
    btnFileDialog->setFixedHeight(30);
    btnFileDialog->setText("选择文件和目录");
    QPushButton* btnFontDialog = new QPushButton(this);
    btnFontDialog->setFixedHeight(30);
    btnFontDialog->setText("选择字体");
    QPushButton* btnInputDialog = new QPushButton(this);
    btnInputDialog->setFixedHeight(30);
    btnInputDialog->setText("允许用户输入一个值，并将其返回");

    QHBoxLayout* hLayout2 = new QHBoxLayout(this);
    QPushButton* btnInfoDialog = new QPushButton(this);//
    btnInfoDialog->setFixedHeight(30);
    btnInfoDialog->setText("info");
    QPushButton* btnWarnDialog = new QPushButton(this);//
    btnWarnDialog->setFixedHeight(30);
    btnWarnDialog->setText("Warn");
    QPushButton* btnCriticalDialog = new QPushButton(this);//
    btnCriticalDialog->setFixedHeight(30);
    btnCriticalDialog->setText("critical");
    QPushButton* btnAboutDialog = new QPushButton(this);//
    btnAboutDialog->setFixedHeight(30);
    btnAboutDialog->setText("about");
    hLayout2->addWidget(btnInfoDialog);
    hLayout2->addWidget(btnWarnDialog);
    hLayout2->addWidget(btnCriticalDialog);
    hLayout2->addWidget(btnAboutDialog);


    QPushButton* btnProgressDialog = new QPushButton(this);//显示操作过程
    btnProgressDialog->setFixedHeight(30);
    btnProgressDialog->setText("显示操作过程");

    vLayout->addWidget(btnBaseDialog);
    vLayout->addLayout(hLayoutColor);
    vLayout->addWidget(btnFileDialog);
    vLayout->addWidget(btnFontDialog);
    vLayout->addWidget(btnInputDialog);
    vLayout->addLayout(hLayout2);
    vLayout->addWidget(btnProgressDialog);

    //vLayout->setDirection(QBoxLayout::BottomToTop);
    vLayout->setSpacing(10);
    this->setLayout(vLayout);
    //基础dialog
    connect(btnBaseDialog, &QPushButton::clicked, [=]() {
        QDialog* dialog = new QDialog;
        dialog->setWindowTitle(tr("基础弹框"));
        dialog->show();
        });
    //选择颜色
    connect(btnColorDialog, &QPushButton::clicked, [=]() {
        QPalette pal = edtColor->palette(); //获取现有 palette
        QColor  iniColor = pal.color(QPalette::Text); //现有的文字颜色
        QColor color = QColorDialog::getColor(iniColor, this, "选择颜色");
        qDebug() << "获取颜色";
        if (color.isValid()) //选择有效
        {
            pal.setColor(QPalette::Text, color); //palette 设置选择的颜色
            edtColor->setPalette(pal); //设置 palette
            //edtColor->setText(color);
        }
        });
    //选择文件或者目录
    connect(btnFileDialog, &QPushButton::clicked, [=]() {
        QString curPath = QCoreApplication::applicationDirPath(); //获取应用程序的路径
        QString dlgTitle = "保存文件"; //对话框标题
        QString filter = "文本文件(*.txt);;h文件(*.h);;C++文件(.cpp);;所有文件(*.*)"; //文件过滤器
        QString aFileName = QFileDialog::getSaveFileName(this, dlgTitle, curPath, filter);
        if (!aFileName.isEmpty())
            edtColor->setText(aFileName);
        });
    //选择字体
    connect(btnFontDialog, &QPushButton::clicked, [=]() {
        QFont iniFont = edtColor->font(); //获取文本框的字体
        bool   ok = false;
        QFont font = QFontDialog::getFont(&ok, iniFont); //选择字体
        if (ok) //选择有效
            edtColor->setFont(font);
        });
    //允许用户输入一个值，并将其值返回
    connect(btnInputDialog, &QPushButton::clicked, [=]() {
        //输入字符串
        QString dlgTitle = "输入文字对话框";
        QString txtLabel = "请输入文件名";
        QString defaultInput = "新建文件.txt";
        QLineEdit::EchoMode echoMode = QLineEdit::Normal;//正常文字输入
        //QLineEdit::EchoMode echoMode=QLineEdit::Password;//密码输入
        bool ok = false;
        QString text = QInputDialog::getText(this, dlgTitle, txtLabel, echoMode, defaultInput, &ok);
        if (ok && !text.isEmpty())
            edtColor->setText(text);
        });

    //模态对话框，用于显示信息、询问问题等
    connect(btnInfoDialog, &QPushButton::clicked, [=]() {
        QString dlgTitle = "删除";
        QString strInfo = "确定要删除吗？";
        QMessageBox::StandardButton result = QMessageBox::information(this, dlgTitle, strInfo,
            QMessageBox::Ok, QMessageBox::No);
        if (result == QMessageBox::Ok) {
            qDebug() << "确定";
        }
        else if (result == QMessageBox::No) {
            qDebug() << "取消";
        }

        });
    connect(btnWarnDialog, &QPushButton::clicked, [=]() {
        QString dlgTitle = "警告";
        QString strInfo = "刀锋来袭";
        QMessageBox::warning(this, dlgTitle, strInfo);
        });
    connect(btnCriticalDialog, &QPushButton::clicked, [=]() {
        QString dlgTitle = "恕瑞玛";
        QString strInfo = "恕瑞玛，你的皇帝回来了";
        QMessageBox::critical(this, dlgTitle, strInfo);
        });
    connect(btnAboutDialog, &QPushButton::clicked, [=]() {
        QString dlgTitle = "Tips";
        QString strInfo = "德玛西亚万岁";
        QMessageBox::about(this, dlgTitle, strInfo);
        });
    //显示操作过程
    connect(btnProgressDialog, &QPushButton::clicked, [=]() {
        pd = new QProgressDialog("当前进度...", "Cancel", 0, 100);
        pd->setWindowFlags(Qt::Dialog | Qt::CustomizeWindowHint | Qt::WindowTitleHint);        //不显示进度条上的“最小化”“最大化”“关闭”
        pd->setWindowTitle("任务保存");    //窗口标题
        pd->setAutoClose(true);        //进度达到最大值时不关闭，默认为true
        pd->setLabelText("任务保存中...");    //显示的文本
        pd->setRange(0, 100);                //设置进度条的极值，默认为[0,100]
        //pd->setCancelButton(NULL);            //不显示取消按钮
        pd->show();                        //进度条显示

        //std::thread mThread(progressFun, this);
        timer->start(20);
        });
    timer = new QTimer(this);
    connect(timer, &QTimer::timeout, this, [=] {
        pd->setValue(steps);
        steps++;
        //终止条件
        if (steps > pd->maximum()) {
            timer->stop();
            steps = 0;
        }
        });

}

DialogWindow::~DialogWindow()
{

}
复制代码

 

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