第四章 Qt5基本对话框——实例：标准基本对话框

_哇呀呀_喝断当阳桥2024-01-05 8:05

一、简介和运行结果

本实例包括"文本标准对话框"、"颜色标准对话框"、"字体标准对话框"、"表输入对话框"、"标准消息对话框"、"自定义对话框"。

二、代码实现

具体细节看书了解。

dialog.h

cpp 复制代码 
#ifndef DIALOG_H
#define DIALOG_H

#include <QDialog>
#include <QPushButton>
#include <QLineEdit>
#include <QLayout>
#include <QFileDialog>
#include <QColorDialog>
#include <QFontDialog>
#include "inputdlg.h"
#include "mesboxdlg.h"

class Dialog : public QDialog
{
    Q_OBJECT

public:
    Dialog(QWidget *parent = 0);
    ~Dialog();
private slots:
    void showFile();//标准文件对话框--槽函数
    void showColor();//颜色标准对话框--槽函数
    void showFont();//标准字体对话框--槽函数
    void showInput();//标准输入对话框--槽函数
    void showMesDlg();//标准信息对话框--槽函数
    void showCustomDlg();//自定义对话框--槽函数
private:
    //标准文件对话框的部件
    QPushButton * fileBtn;
    QLineEdit * fileLineEdit;
    //颜色标准对话框的部件
    QPushButton * colorBtn;
    QFrame * colorFrame;
    //标准字体对话框部件
    QPushButton * fontBtn;
    QLineEdit * fontLineEdit;
    //标准输入对话框部件
    QPushButton * inputBtn;
    InputDlg * inputDlg;
    //标准消息对话框实例部件
    QPushButton * MesBtn;
    MesBoxDlg * mesDlg;
    //自定义消息框部件
    QPushButton * CustomBtn;
    QLabel * label;
    //整体布局
    QGridLayout * mainLayout;


};

#endif // DIALOG_H

dialog.cpp

cpp 复制代码 
#include "dialog.h"

Dialog::Dialog(QWidget *parent)
    : QDialog(parent)
{
    //1、标准文件对话框
    fileBtn = new QPushButton;
    fileBtn->setText(tr("文件标准对话框实例"));
    fileLineEdit = new QLineEdit;
    connect(fileBtn,SIGNAL(clicked()),this,SLOT(showFile()));//连接信号
    //2、颜色标准对话框
    colorBtn = new QPushButton;
    colorBtn->setText(tr("颜色标准对话框实例"));
    colorFrame = new QFrame;
    colorFrame->setFrameShape(QFrame::Box);//框架的形状--盒子
    colorFrame->setAutoFillBackground(true);//背景颜色
    connect(colorBtn,SIGNAL(clicked()),this,SLOT(showColor()));
    //3、标准字体对话框
    fontBtn = new QPushButton;
    fontBtn->setText(tr("标准字体对话框"));
    fontLineEdit = new QLineEdit;
    fontLineEdit->setText(tr("Welcome!"));
    connect(fontBtn,SIGNAL(clicked()),this,SLOT(showFont()));
    //4、标准输入对话框
    inputBtn = new QPushButton;
    inputBtn->setText(tr("标准输入对话框"));
    connect(inputBtn,SIGNAL(clicked()),this,SLOT(showInput()));
    //5、标准信息对话框
    MesBtn = new QPushButton;
    MesBtn->setText(tr("标准信息对话框"));
    connect(MesBtn,SIGNAL(clicked()),this,SLOT(showMesDlg()));
    //6、自定义对话框
    CustomBtn = new QPushButton;
    CustomBtn->setText(tr("用户自定义消息对话框实例"));
    label = new QLabel;
    label->setFrameStyle(QFrame::Panel | QFrame::Sunken);
    connect(CustomBtn,SIGNAL(clicked()),this,SLOT(showCustomDlg()));
    //布局
    mainLayout = new QGridLayout(this);
    mainLayout->addWidget(fileBtn,0,0);
    mainLayout->addWidget(fileLineEdit,0,1);
    mainLayout->addWidget(colorBtn,1,0);
    mainLayout->addWidget(colorFrame,1,1);
    mainLayout->addWidget(fontBtn,2,0);
    mainLayout->addWidget(fontLineEdit,2,1);
    mainLayout->addWidget(inputBtn,3,0);
    mainLayout->addWidget(MesBtn,3,1);
    mainLayout->addWidget(CustomBtn,4,0);
    mainLayout->addWidget(label,4,1);
}

//1、标准文件对话框--槽函数
void Dialog::showFile()
{
    QString s = QFileDialog::getOpenFileName(this,"open file dialog","/",
                                             "All files(*.*);;"
                                             "C++ files(*.cpp);;"
                                             "C file(*.c);;"
                                             "Head files(*.h)");
    fileLineEdit->setText(s);
}

//2、颜色标准对话框--槽函数
void Dialog::showColor()
{
    QColor c = QColorDialog::getColor(Qt::blue);
    if(c.isValid()){//QColor::isValid()函数可以判断用户选择的颜色是否有效
        colorFrame->setPalette(QPalette(c));
    }
}

//3、标准字体对话框--槽函数
void Dialog::showFont()
{
    bool ok;
    QFont f = QFontDialog::getFont(&ok);
    if(ok){
        fontLineEdit->setFont(f);
    }
}

//标准输入对话框--槽函数
void Dialog::showInput()
{
    inputDlg = new InputDlg;
    inputDlg->show();
}

//标准信息对话框--槽函数
void Dialog::showMesDlg()
{
    mesDlg = new MesBoxDlg();
    mesDlg->show();
}

void Dialog::showCustomDlg()
{
    label->setText(tr("Custom Message Box"));
    QMessageBox customMsgBox;
    //QLabel ico = ("Qt.png");
    customMsgBox.setWindowTitle(tr("自定义消息框"));
    QPushButton * yesBtn = customMsgBox.addButton(tr("YES"),QMessageBox::ActionRole);
    QPushButton * noBtn = customMsgBox.addButton(tr("NO"),QMessageBox::ActionRole);
    QPushButton * cancelBtn = customMsgBox.addButton(QMessageBox::Cancel);
    //customMsgBox.setIconPixmap(QPixmap("Qt.png"));//没有出现,不知道为什么
    customMsgBox.setText(tr("这是一个用户自定义消息框"));


    customMsgBox.exec();
    if(customMsgBox.clickedButton() == yesBtn)
        label->setText("Custom Message Box/Yes");
    if(customMsgBox.clickedButton() == noBtn)
        label->setText("Custom Message Box/No");
    if(customMsgBox.clickedButton() == cancelBtn)
        label->setText( "Custom Message Box/Cancel");
    return;
}

Dialog::~Dialog()
{

}

子窗口--消息框mesboxdlg.h

cpp 复制代码 
#ifndef MESBOXDLG_H
#define MESBOXDLG_H

#include <QLabel>
#include <QDialog>
#include <QPushButton>
#include <QLayout>
#include <QMessageBox>

class MesBoxDlg : public QDialog
{
    Q_OBJECT
public:
    MesBoxDlg(QWidget * parent = 0);
    ~MesBoxDlg();
private slots:
    void showQuestionMsg();
    void showInformationMsg();
    void showWarningMsg();
    void showCriticalMsg();
    void showAboutMsg();
    void showAboutQtMsg();
private:
    QLabel * label;
    QPushButton * questionBtn;
    QPushButton * informationBtn;
    QPushButton * warningBtn;
    QPushButton * criticalBtn;
    QPushButton * aboutBtn;
    QPushButton * aboutQtBtn;
    QGridLayout * mainLayout;

};

#endif // MESBOXDLG_H

子窗口--消息框mesboxdlg.cpp

cpp 复制代码 
#include "mesboxdlg.h"

MesBoxDlg::MesBoxDlg(QWidget * parent):QDialog(parent)
{
    setWindowTitle(tr("标准消息对话框实例："));
    label = new QLabel;
    label->setText(tr("请选择一种消息框"));
    questionBtn = new QPushButton;
    questionBtn->setText(tr("QuestionMsg"));
    informationBtn = new QPushButton;
    informationBtn->setText(tr("InformationMsg"));
    warningBtn = new QPushButton;
    warningBtn->setText(tr("WarningMsg"));
    criticalBtn = new QPushButton;
    criticalBtn->setText(tr("CriticalMsg"));
    aboutBtn = new QPushButton;
    aboutBtn->setText(tr("AboutMsg"));
    aboutQtBtn = new QPushButton;
    aboutQtBtn->setText(tr("AboutQtMsg"));
    //布局
    mainLayout = new QGridLayout(this);
    mainLayout->addWidget(label,0,0);
    mainLayout->addWidget(questionBtn,1,0);
    mainLayout->addWidget(informationBtn,1,1);
    mainLayout->addWidget(warningBtn,2,0);
    mainLayout->addWidget(criticalBtn,2,1);
    mainLayout->addWidget(aboutBtn,3,0);
    mainLayout->addWidget(aboutQtBtn,3,1);
    //连接信号
    connect(questionBtn,SIGNAL(clicked()),this,SLOT(showQuestionMsg()));
    connect(informationBtn,SIGNAL(clicked()),this,SLOT(showInformationMsg()));
    connect(warningBtn,SIGNAL(clicked()),this,SLOT(showWarningMsg()));
    connect(criticalBtn,SIGNAL(clicked()),this,SLOT(showCriticalMsg()));
    connect(aboutBtn,SIGNAL(clicked()),this,SLOT(showAboutMsg()));
    connect(aboutQtBtn,SIGNAL(clicked()),this,SLOT(showAboutQtMsg()));
}

MesBoxDlg::~MesBoxDlg()
{

}

void MesBoxDlg::showQuestionMsg()
{
    label->setText(tr("Question Message Box"));
    switch (QMessageBox::question(this,tr("Question消息框"),
                                  tr("您现在已经修改成功，是否要结束程序？"),
                                  QMessageBox::Ok | QMessageBox::Cancel, QMessageBox::Ok))
    {
    case QMessageBox::Ok:
        label->setText("Question button/Ok");
        break;
    case QMessageBox::Cancel:
        label->setText("Quesstion button/Cancel");
        break;
    default:
        break;
    }
    return;
}

void MesBoxDlg::showInformationMsg()
{
    label->setText(tr("Information Message Box"));
    QMessageBox::information(this,tr("Information消息框"),
                             tr("这是Information消息框测试"));
    return;
}

void MesBoxDlg::showWarningMsg()
{
    label->setText(tr("Warning Message Box"));
    switch (QMessageBox::warning(this,tr("Waring消息框"),
                                 tr("您修改的内容还未保存，是否要保存对文档的修改？"),
                                 QMessageBox::Save | QMessageBox::Discard | QMessageBox::Cancel,
                                 QMessageBox::Save))
    {
    case QMessageBox::Save:
        label->setText(tr("Warning button/Save"));
        break;
    case QMessageBox::Discard:
        label->setText(tr("Warning button/Discard"));
        break;
    case QMessageBox::Cancel:
        label->setText(tr("Warning button/Cancel"));
        break;
    default:
        break;
    }
    return;
}

void MesBoxDlg::showCriticalMsg()
{
    label->setText(tr("Critical Message Box"));
    QMessageBox::critical(this,tr("Critical消息框"),tr("这是一个Critical消息框测试"));
    return;
}

void MesBoxDlg::showAboutMsg()
{
    label->setText(tr("About Message Box"));
    QMessageBox::about(this,tr("Abouut消息框"),tr("这是一个About消息框测试"));
    return;
}

void MesBoxDlg::showAboutQtMsg()
{
    label->setText(tr("About Qt Message Box"));
    QMessageBox::aboutQt(this,tr("About Qt消息框"));
    return;
}

子窗口--输入对话框inputdlg.h

cpp 复制代码 
#ifndef INPUTDLG_H
#define INPUTDLG_H

#include <QLabel>
#include <QPushButton>
#include <QDialog>
#include <QLayout>
#include <QInputDialog>

class InputDlg : public QDialog
{
    Q_OBJECT
public:
    InputDlg(QWidget* parent = 0);
    ~InputDlg();
private slots:
    void changeName();
    void changeSex();
    void changeAge();
    void changeScore();
private:
    QLabel * nameLabel1;
    QLabel * nameLabel2;
    QLabel * sexLabel1;
    QLabel * sexLabel2;
    QLabel * ageLabel1;
    QLabel * ageLabel2;
    QLabel * scoreLabel1;
    QLabel * scoreLabel2;
    QPushButton * nameBtn;
    QPushButton * sexBtn;
    QPushButton * ageBtn;
    QPushButton * scoreBtn;
    QGridLayout * mainLayout;
};

#endif // INPUTDLG_H

子窗口--输入对话框inputdlg.cpp

cpp 复制代码 
#include "inputdlg.h"

InputDlg::InputDlg(QWidget * parent):QDialog(parent)
{
    setWindowTitle(tr("标准输入对话框"));
    nameLabel1 = new QLabel;
    nameLabel1->setText(tr("姓名："));
    nameLabel2 = new QLabel;
    nameLabel2->setText(tr("杨五郎"));
    nameLabel2->setFrameStyle(QFrame::Panel | QFrame::Sunken);
    nameBtn = new QPushButton;
    nameBtn->setText(tr("修改姓名"));
    sexLabel1 = new QLabel;
    sexLabel1->setText(tr("性别："));
    sexLabel2 = new QLabel;
    sexLabel2->setText(tr("男"));
    sexLabel2->setFrameStyle(QFrame::Panel | QFrame::Sunken);
    sexBtn = new QPushButton;
    sexBtn->setText(tr("修改性别"));
    ageLabel1 = new QLabel;
    ageLabel1->setText(tr("年龄："));
    ageLabel2 = new QLabel;
    ageLabel2->setText(tr("20"));
    ageLabel2->setFrameStyle(QFrame::Panel | QFrame::Sunken);
    ageBtn = new QPushButton;
    ageBtn->setText(tr("修改年龄"));
    scoreLabel1 = new QLabel;
    scoreLabel1->setText(tr("成绩："));
    scoreLabel2 = new QLabel;
    scoreLabel2->setText(tr("80"));
    scoreLabel2->setFrameStyle(QFrame::Panel | QFrame::Sunken);
    scoreBtn = new QPushButton;
    scoreBtn->setText(tr("修改成绩"));
    mainLayout = new QGridLayout(this);
    mainLayout->addWidget(nameLabel1,0,0);
    mainLayout->addWidget(nameLabel2,0,1);
    mainLayout->addWidget(nameBtn,0,2);
    mainLayout->addWidget(sexLabel1,1,0);
    mainLayout->addWidget(sexLabel2,1,1);
    mainLayout->addWidget(sexBtn,1,2);
    mainLayout->addWidget(ageLabel1,2,0);
    mainLayout->addWidget(ageLabel2,2,1);
    mainLayout->addWidget(ageBtn,2,2);
    mainLayout->addWidget(scoreLabel1,3,0);
    mainLayout->addWidget(scoreLabel2,3,1);
    mainLayout->addWidget(scoreBtn,3,2);
    mainLayout->setMargin(15);
    mainLayout->setSpacing(10);
    connect(nameBtn,SIGNAL(clicked()),this,SLOT(changeName()));
    connect(sexBtn,SIGNAL(clicked()),this,SLOT(changeSex()));
    connect(ageBtn,SIGNAL(clicked()),this,SLOT(changeAge()));
    connect(scoreBtn,SIGNAL(clicked()),this,SLOT(changeScore()));
}

InputDlg::~InputDlg()
{

}

void InputDlg::changeName()
{
    bool ok;
    QString text = QInputDialog::getText(this,tr("标准字符串输入对话框"),tr("请输入姓名："),
                                         QLineEdit::Normal,nameLabel2->text(),&ok);
    if(ok && !text.isEmpty())
        nameLabel2->setText(text);
}

void InputDlg::changeSex()
{
    QStringList SexItems;
    SexItems<<tr("男")<<tr("女");
    bool ok;
    QString SexItem = QInputDialog::getItem(this,tr("标准条目输入对话框："),tr("请选择性别："),
                                            SexItems,0,false,&ok);
    if(ok && !SexItem.isEmpty())
        sexLabel2->setText(SexItem);
}

void InputDlg::changeAge()
{
    bool ok;
    int age = QInputDialog::getInt(this,tr("标准int类型输入对话框"),tr("请输入年龄："),
                                   ageLabel2->text().toInt(&ok),0,120,1,&ok);
    if(ok)
        ageLabel2->setText(QString("%1").arg(age));
}

void InputDlg::changeScore()
{
    bool ok;
    double score = QInputDialog::getDouble(this,tr("标准double类型输入对话框"),tr("请输入成绩："),
                                           scoreLabel2->text().toDouble(&ok),0,150,1,&ok);
    if(ok)
        scoreLabel2->setText(QString("%1").arg(score));
}
相关推荐
IT技术分享社区12 分钟前
C#实战：使用腾讯云识别服务轻松提取火车票信息
开发语言·c#·云计算·腾讯云·共识算法
极客代码15 分钟前
【Python TensorFlow】入门到精通
开发语言·人工智能·python·深度学习·tensorflow
疯一样的码农22 分钟前
Python 正则表达式（RegEx）
开发语言·python·正则表达式
&岁月不待人&44 分钟前
Kotlin by lazy和lateinit的使用及区别
android·开发语言·kotlin
StayInLove1 小时前
G1垃圾回收器日志详解
java·开发语言
无尽的大道1 小时前
Java字符串深度解析：String的实现、常量池与性能优化
java·开发语言·性能优化
爱吃生蚝的于勒1 小时前
深入学习指针（5）！！！！！！！！！！！！！！！
c语言·开发语言·数据结构·学习·计算机网络·算法
binishuaio1 小时前
Java 第11天 (git版本控制器基础用法)
java·开发语言·git
zz.YE1 小时前
【Java SE】StringBuffer
java·开发语言
就是有点傻1 小时前
WPF中的依赖属性
开发语言·wpf
热门推荐
01【HarmonyOS】HUAWEI DevEco Studio 下载地址汇总02(欧拉)openEuler系统添加网卡文件配置流程、(欧拉)openEuler系统手动配置ipv6地址流程、(欧拉)openEuler系统网络管理说明03组基轨迹建模 GBTM的介绍与实现（Stata 或 R）04【AIGC】重塑未来的科技巨轮05全面解析：构建基于深度学习的安全帽检测系统（UI界面+YOLO代码+数据集）06【经验分享】Ubuntu22.04安装微信(linux官方版)07基于YOLOv10深度学习的CT扫描图像肾结石智能检测系统【python源码+Pyqt5界面+数据集+训练代码】深度学习实战、目标检测08Ubuntu 20.04使用Livox mid 360 测试 FAST_LIO09RAG 实践- Ollama+RagFlow 部署本地知识库10红米手机使用google play