对话框

界面

代码

dialog.cpp

#include "dialog.h"
#include "ui_dialog.h"
#include <QFileDialog>
#include <QColorDialog>
#include <QFontDialog>
#include <QInputDialog>
#include <QMessageBox>

Dialog::Dialog(QWidget *parent)
    : QDialog(parent)
    , ui(new Ui::Dialog)
{
    ui->setupUi(this);
}

Dialog::~Dialog()
{
    delete ui;
}


void Dialog::on_btnClearText_clicked()
{
    ui->plainTextEdit->clear();
}

void Dialog::on_btnOpen_clicked()
{
    QString curPath = QDir::currentPath(); //对话框默认打开目录
    QString dlgTitle = "选择对话框";
    QString filter = "文本文件(*.txt);;图片文件(*.jpg *.gif);;所有格式(*.*)";
    QString fileName = QFileDialog::getOpenFileName(this, dlgTitle, curPath,
                                                    filter);
    if(fileName.isEmpty())
        return ;

    ui->plainTextEdit->appendPlainText(fileName);
}

void Dialog::on_btnOpenMulti_clicked()
{
    QString curPath = QDir::currentPath();
    QString dlgTitle = "选择对话框";
    QString filter = "文本文件(*.txt);;图片文件(*.jpg *.gif);;所有格式(*.*)";
    QStringList fileNames = QFileDialog::getOpenFileNames(this, dlgTitle, curPath,
                                                    filter);
    if(fileNames.count() == 0)
        return ;
    foreach(auto str, fileNames){
         ui->plainTextEdit->appendPlainText(str);
    }
}

void Dialog::on_btnSelDir_clicked()
{
    QString curPath = QDir::currentPath();
    QString dlgTitle = "选择对话框";
    //QString filter = "文本文件(*.txt);;图片文件(*.jpg *.gif);;所有格式(*.*)";
    QString selectedDir = QFileDialog::getExistingDirectory(this, dlgTitle, curPath, QFileDialog::ShowDirsOnly); //只显示目录
    if(selectedDir.isEmpty())
        return ;

    ui->plainTextEdit->appendPlainText(selectedDir);
}

void Dialog::on_btnSave_clicked()
{
    QString curPath = QCoreApplication::applicationDirPath(); //对话框默认打开目录
    QString dlgTitle = "选择对话框";
    QString filter = "文本文件(*.txt);;图片文件(*.jpg *.gif);;所有格式(*.*)";
    QString fileName = QFileDialog::getSaveFileName(this, dlgTitle, curPath,
                                                    filter);
    if(fileName.isEmpty())
        return ;

    ui->plainTextEdit->appendPlainText("保存文件：" + fileName);
}

void Dialog::on_btnColor_clicked()
{
    QPalette pal = ui->plainTextEdit->palette();
    QColor initColor = pal.color(QPalette::Text);
    QColor color = QColorDialog::getColor(initColor, this, "选择一个颜色");
    if(!color.isValid())
        return;
    pal.setColor(QPalette::Text, color);
    ui->plainTextEdit->setPalette(pal);
}

void Dialog::on_btnFont_clicked()
{
    bool ok = false;
    QFont initFont = ui->plainTextEdit->font();
    QFont font =  QFontDialog::getFont(&ok, initFont, this, "选择字体");
    if(!ok)
        return;
    ui->plainTextEdit->setFont(font);
}

void Dialog::on_btnInputString_clicked()
{
    QString dlgTitle = "输入文字对话框";
    QString txtLabel = "请输入文件名";
    QString defaultInput = "xxxx.txt";
    QLineEdit::EchoMode echoMode = QLineEdit::Normal;
    bool ok = false;
    QString str = QInputDialog::getText(this, dlgTitle, txtLabel,
                                       echoMode, defaultInput, &ok);
    if(!ok) return ;
    ui->plainTextEdit->appendPlainText(str);

}

void Dialog::on_btnInputInt_clicked()
{
    QString dlgTitle = "输入整数对话框";
    QString txtLabel = "请输入整数";
    int defaultVal = ui->plainTextEdit->font().pointSize();
    int minValue = 0, maxValue = 100;
    bool ok = false;
    int val = QInputDialog::getInt(this, dlgTitle, txtLabel,
                                   defaultVal, minValue, maxValue,
                                   1, &ok); //步长为1
    if(!ok) return ;

    QFont font = ui->plainTextEdit->font();
    font.setPointSize(val);
    ui->plainTextEdit->setFont(font);
    ui->plainTextEdit->appendPlainText(QString::asprintf("输入了一个整数：%d", val));
}

void Dialog::on_btnInputFloat_clicked()
{
    QString dlgTitle = "输入浮点数对话框";
    QString txtLabel = "请输入浮点数";
    double defaultVal = 15.0;
    double minValue = 0, maxValue = 100;
    bool ok = false;
    double val = QInputDialog::getDouble(this, dlgTitle, txtLabel,
                                   defaultVal, minValue, maxValue,
                                   2, &ok); //小数点后2位
    if(!ok) return ;
    ui->plainTextEdit->appendPlainText(QString::asprintf("输入了一个浮点数：%.2f", val));
}

void Dialog::on_btnInputItem_clicked()
{
    QStringList items;
    items << "优先" << "良好" << "及格" << "不及格";

    QString dlgTitle = "输入条目对话框";
    QString txtLabel = "请选择条目";
    bool ok = false;
    QString text = QInputDialog::getItem(this, dlgTitle, txtLabel, items, 0,
                                         true, &ok); //true表示除了选择还可以输入

    if(!ok || text.isEmpty()) return ;
    ui->plainTextEdit->appendPlainText(text);
}

void Dialog::on_btnMsgQuestion_clicked()
{
    QString dlgTitle = "Question消息框";
    QString txtLabel = "文件已被修改，是否保存？";
    QMessageBox::StandardButtons result;
    result = QMessageBox::question(this, dlgTitle, txtLabel,
                          QMessageBox::Yes | QMessageBox::No | QMessageBox::Cancel,
                          QMessageBox::NoButton);
    QString str;
    if(result == QMessageBox::Yes)
        str = "Question消息框 yes被选中";
    else if(result == QMessageBox::No)
        str = "Question消息框 No被选中";
    else if(result == QMessageBox::Cancel)
        str = "Question消息框 Cancel被选中";

    ui->plainTextEdit->appendPlainText(str);
}

void Dialog::on_btnMsgInformation_clicked()
{
    QMessageBox::information(this, "Title", "TXT", QMessageBox::Ok);
}

void Dialog::on_btnMsgWarning_clicked()
{
    QMessageBox::warning(this, "Title", "TXT", QMessageBox::Ok);
}

void Dialog::on_btnMsgCritical_clicked()
{
    QMessageBox::critical(this, "Title", "TXT", QMessageBox::Ok);
}

void Dialog::on_btnMsgAbout_clicked()
{
    QMessageBox::about(this, "Title", "TXT");
}

void Dialog::on_btnMsgAboutQt_clicked()
{
    QMessageBox::aboutQt(this, "Title");
}