QtMeatObjectEx
Qt MeatObject Example
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touwoyimuli@gmail.com
parent
28a4a6f1bf
commit
20faa16653
29
QtMeatObjectEx/ExPerson.cpp
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29
QtMeatObjectEx/ExPerson.cpp
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#include "ExPerson.h"
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//加一个参后的构造函数
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ExPerson::ExPerson(QString name, QObject *parent) : QObject(parent)
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{
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m_name = name;
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}
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int ExPerson::getAge()
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{
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return m_age;
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}
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void ExPerson::setAge(int value)
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{
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m_age = value;
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emit ageChanged(m_age); //发射信号
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}
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void ExPerson::incAge()
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{
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m_age++;
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emit ageChanged(m_age); //发射信号
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}
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39
QtMeatObjectEx/ExPerson.h
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39
QtMeatObjectEx/ExPerson.h
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#ifndef EXPERSON_H
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#define EXPERSON_H
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#include <QObject>
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class ExPerson : public QObject
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{
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Q_OBJECT
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//类的附加信息：名称————值
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Q_CLASSINFO("author", "touwoyimuli")
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Q_CLASSINFO("version", "1.0.0")
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Q_CLASSINFO("info", "Qt5 Meta Object and Property Example")
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//属性定义
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Q_PROPERTY(int age READ getAge WRITE setAge NOTIFY ageChanged) //属性age; 方法getAge()和setAge()对其读写; 设置信号ageChanged()
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Q_PROPERTY(QString name MEMBER m_name) //属性name 与类成员变量m_name关联
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Q_PROPERTY(int score MEMBER m_score) //属性score与类成员变量m_score关联
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public:
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explicit ExPerson(QString name, QObject *parent = nullptr);
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public:
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int getAge(); //属性 READ 函数
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void setAge(int value); //属性 WRITE 函数
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void incAge(); //单独写一个接口，与属性无关
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signals:
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void ageChanged(int value); //属性age发生改变的信号函数
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private:
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int m_age = 5;
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QString m_name;
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int m_score = 50;
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};
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#endif // EXPERSON_H
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106
QtMeatObjectEx/ExWidget.cpp
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QtMeatObjectEx/ExWidget.cpp
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#include "ExWidget.h"
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#include "ui_ExWidget.h"
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#include <QMetaProperty>
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#include <QDebug>
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ExWidget::ExWidget(QWidget *parent) : QWidget(parent), ui(new Ui::ExWidget)
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{
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ui->setupUi(this);
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m_boy = new ExPerson("张三");
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m_boy->setProperty("score", 90);
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m_boy->setProperty("age", 20);
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m_boy->setProperty("sex", "Boy"); //动态属性
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connect(m_boy, &ExPerson::ageChanged, this, &ExWidget::onAgeChange);
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m_girl = new ExPerson("张丽");
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m_girl->setProperty("score", 80);
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m_girl->setProperty("age", 10);
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m_girl->setProperty("sex", "Gril"); //动态属性
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connect(m_girl, &ExPerson::ageChanged, this, &ExWidget::onAgeChange);
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ui->spinBoy->setProperty("isBoy", true); //动态属性
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ui->spinGril->setProperty("isBoy", false);
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connect(ui->spinGril, SIGNAL(valueChanged(int)), this, SLOT(onSpinValChange(int)));
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connect(ui->spinBoy, SIGNAL(valueChanged(int)), this, SLOT(onSpinValChange(int)));
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connect(ui->btnBoyAdd, SIGNAL(clicked()), this, SLOT(onBtnBoyInc()));
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connect(ui->btnGrilAdd, SIGNAL(clicked()), this, SLOT(onBtnGrilInc()));
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connect(ui->btnMetaObject, SIGNAL(clicked()), this, SLOT(onClassInfo()));
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connect(ui->btnClean, SIGNAL(clicked()), this, SLOT(onBtnClear()));
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setWindowTitle(QObject::tr("元对象MetaObject和(含动态)属性Propert的用法"));
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}
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ExWidget::~ExWidget()
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{
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delete ui;
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}
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void ExWidget::onAgeChange(int val)
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{
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Q_UNUSED(val) //参数val没使用，避免警告
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ExPerson* person = qobject_cast<ExPerson *>(sender()); //类型投射
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QString name = person->property("name").toString();
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QString sex = person->property("sex").toString();
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int age = person->getAge(); //通过接口函数，获得年龄
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//或使用 int age = person->property("age").toInt();
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ui->textEdit->appendPlainText(name+","+sex + QString::asprintf(",年龄=%d",age));
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}
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void ExWidget::onSpinValChange(int val)
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{
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Q_UNUSED(val)
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QSpinBox* spin = qobject_cast<QSpinBox *>(sender()); //类型投射
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if (spin->property("isBoy").toBool())
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m_boy->setAge(ui->spinBoy->value());
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else
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m_girl->setAge(ui->spinGril->value());
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}
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void ExWidget::onBtnClear()
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{
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ui->textEdit->clear();
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}
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void ExWidget::onBtnBoyInc()
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{
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m_boy->incAge();
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}
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void ExWidget::onBtnGrilInc()
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{
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m_girl->incAge();
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}
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void ExWidget::onClassInfo()
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{
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const QMetaObject* meta = m_boy->metaObject();
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ui->textEdit->clear();
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ui->textEdit->appendPlainText("==元对象信息(Meta Object)===");
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ui->textEdit->appendPlainText(QString("类名称: %1\n").arg(meta->className()));
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ui->textEdit->appendPlainText("属性(property)");
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for (int i = meta->propertyOffset(); i < meta->propertyCount(); i++)
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{
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QMetaProperty prop = meta->property(i);
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const char* propName = prop.name();
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QString propValue = m_boy->property(propName).toString();
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ui->textEdit->appendPlainText(QString("属性名称=%1， 属性值= %2").arg(propName).arg(propValue));
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}
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ui->textEdit->appendPlainText("");
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ui->textEdit->appendPlainText("classInfo:");
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for (int i = meta->classInfoOffset(); i < meta->classInfoCount(); i++)
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{
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QMetaClassInfo classInfo = meta->classInfo(i);
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ui->textEdit->appendPlainText(QString("Name=%1， Value= %2").arg(classInfo.name()).arg(classInfo.value()));
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}
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}
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35
QtMeatObjectEx/ExWidget.h
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QtMeatObjectEx/ExWidget.h
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#ifndef EXWIDGET_H
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#define EXWIDGET_H
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#include <QWidget>
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#include "ExPerson.h"
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namespace Ui {
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class ExWidget;
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}
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class ExWidget : public QWidget
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{
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Q_OBJECT
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public:
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explicit ExWidget(QWidget *parent = nullptr);
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~ExWidget();
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private slots:
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void onAgeChange(int val); //自定义的槽函数
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void onSpinValChange(int val);
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void onBtnClear(); //UI界面的槽函数
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void onBtnBoyInc();
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void onBtnGrilInc();
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void onClassInfo();
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private:
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Ui::ExWidget *ui;
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ExPerson* m_boy;
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ExPerson* m_girl;
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};
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#endif // EXWIDGET_H
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114
QtMeatObjectEx/ExWidget.ui
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QtMeatObjectEx/ExWidget.ui
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<?xml version="1.0" encoding="UTF-8"?>
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<ui version="4.0">
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<class>ExWidget</class>
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<widget class="QWidget" name="ExWidget">
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<property name="geometry">
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<rect>
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<x>0</x>
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<y>0</y>
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<width>526</width>
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<height>313</height>
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</rect>
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</property>
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<property name="windowTitle">
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<string>ExWidget</string>
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</property>
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<layout class="QGridLayout" name="gridLayout_2">
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<item row="0" column="1">
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<layout class="QGridLayout" name="gridLayout">
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<item row="0" column="0">
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<widget class="QLabel" name="labBoy">
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<property name="text">
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<string>设置男生的年龄：</string>
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</property>
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</widget>
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</item>
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<item row="8" column="0">
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<spacer name="verticalSpacer">
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<property name="orientation">
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<enum>Qt::Vertical</enum>
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</property>
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<property name="sizeHint" stdset="0">
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<size>
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<width>20</width>
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<height>40</height>
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</size>
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</property>
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</spacer>
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</item>
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<item row="3" column="0">
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<spacer name="verticalSpacer_2">
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<property name="orientation">
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<enum>Qt::Vertical</enum>
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</property>
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<property name="sizeType">
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<enum>QSizePolicy::Fixed</enum>
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</property>
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<property name="sizeHint" stdset="0">
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<size>
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<width>20</width>
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<height>20</height>
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</size>
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</property>
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</spacer>
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</item>
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<item row="2" column="0">
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<widget class="QPushButton" name="btnBoyAdd">
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<property name="text">
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<string>Boy:Age 增加</string>
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</property>
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</widget>
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</item>
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<item row="1" column="0">
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<widget class="QSpinBox" name="spinBoy">
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<property name="value">
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<number>20</number>
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</property>
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</widget>
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</item>
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<item row="9" column="0">
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<widget class="QPushButton" name="btnMetaObject">
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<property name="text">
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<string>类的元对象信息</string>
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</property>
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</widget>
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</item>
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<item row="5" column="0">
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<widget class="QLabel" name="labGril">
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<property name="text">
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<string>设置女生年龄</string>
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</property>
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</widget>
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</item>
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<item row="10" column="0">
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<widget class="QPushButton" name="btnClean">
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<property name="text">
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<string>清空文本框</string>
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</property>
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</widget>
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</item>
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<item row="7" column="0">
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<widget class="QPushButton" name="btnGrilAdd">
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<property name="text">
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<string>Girl:Age 增加</string>
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</property>
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</widget>
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</item>
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<item row="6" column="0">
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<widget class="QSpinBox" name="spinGril">
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<property name="value">
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<number>10</number>
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</property>
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</widget>
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</item>
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</layout>
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</item>
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<item row="0" column="2">
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<widget class="QPlainTextEdit" name="textEdit"/>
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</item>
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</layout>
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</widget>
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<layoutdefault spacing="6" margin="11"/>
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<resources/>
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<connections/>
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</ui>
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42
QtMeatObjectEx/QtMeatObjectEx.pro
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42
QtMeatObjectEx/QtMeatObjectEx.pro
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#-------------------------------------------------
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#
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# Project created by QtCreator 2019-08-16T20:47:42
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#
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#-------------------------------------------------
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QT += core gui
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greaterThan(QT_MAJOR_VERSION, 4): QT += widgets
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TARGET = QtMeatObjectEx
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TEMPLATE = app
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# The following define makes your compiler emit warnings if you use
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# any feature of Qt which has been marked as deprecated (the exact warnings
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# depend on your compiler). Please consult the documentation of the
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# deprecated API in order to know how to port your code away from it.
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DEFINES += QT_DEPRECATED_WARNINGS
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# You can also make your code fail to compile if you use deprecated APIs.
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# In order to do so, uncomment the following line.
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# You can also select to disable deprecated APIs only up to a certain version of Qt.
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#DEFINES += QT_DISABLE_DEPRECATED_BEFORE=0x060000 # disables all the APIs deprecated before Qt 6.0.0
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CONFIG += c++11
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SOURCES += \
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main.cpp \
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ExWidget.cpp \
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ExPerson.cpp
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HEADERS += \
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ExWidget.h \
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ExPerson.h
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FORMS += \
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ExWidget.ui
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# Default rules for deployment.
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qnx: target.path = /tmp/$${TARGET}/bin
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else: unix:!android: target.path = /opt/$${TARGET}/bin
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!isEmpty(target.path): INSTALLS += target
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11
QtMeatObjectEx/main.cpp
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11
QtMeatObjectEx/main.cpp
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#include "ExWidget.h"
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#include <QApplication>
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int main(int argc, char *argv[])
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{
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QApplication a(argc, argv);
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ExWidget w;
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w.show();
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return a.exec();
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}
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