Qt通用属性工具：随心定义，随时可见（二）

news2025/2/4 6:54:56

一、话接上篇

本片咱们话接上篇《Qt通用属性工具：随心定义，随时可见（一）》，讲讲自定义的对象属性如何绑定通用属性编辑工具。

二、破杯二两酒

1、一颗小花生

同样，我们先准备一个比较简单的demo，先看看效果。
在这里插入图片描述
这里我们自定义了一个Student 类型，为它咱们定义了三个属性，
id : 只读。在上图的演示中，我们也可以看到，我尝试对id进行修改，实际并没有生效。这里实际可以进一步优化通用属性编辑器，当只读属性时，直接灰显，不允许修改可能更好(后续优化)
name : 可读、可写，当name发生变化时，我们还让他发出一个nameChanged的信号。从上图我们修改名字，对应绑定的槽函数的打印输出信息可以看到。喔嚯，MVC，真是爽歪歪。
age : 可读可写。修改值，自然也可以生效

2、一碟花生米

#include "widget.h"
#include <QApplication>
#include <QObject>
#include "QtPropertyEditor.h"
#include <QHBoxLayout>
#include <QDebug>

class Student : public QObject
{
    Q_OBJECT
    Q_PROPERTY(QString id READ id)
    Q_PROPERTY(QString name READ name WRITE setName NOTIFY nameChanged)
    Q_PROPERTY(int age READ age WRITE setAge)
public:
    Student():_id("xxoo"){}
    Student(const QString id) : _id(id){}
    Student(const QString id,const QString name)
        : _id(id),_name(name){}
    Student(const QString id,const QString name,const int age)
        : _id(id),_name(name),_age(age){}

    Student(const Student& that){
        this->_name = that.name();
        this->_age = that.age();
    }

    const QString id() const { return _id;}

    const QString name() const {return _name;}
    void setName(const QString& name){ _name = name; nameChanged(name);}
    void setName(const QString&& name){_name = name;}

    const int age() const { return _age;}
    void setAge(const int& age){ _age = age;}
    void setAge(const int&& age){ _age = age;}
signals:
    void nameChanged(QString name);

private:
    const QString _id;
    QString _name;
    int _age;
};
Q_DECLARE_METATYPE(Student)


class StudentList: public QObject
{
    Q_OBJECT
    Q_PROPERTY(QList<Student> students READ students WRITE setStudents)
    Q_PROPERTY(QString desc READ desc WRITE setDesc)
public:
    StudentList(){}
    StudentList(const QList<Student> lstu ):_students(lstu){}
    StudentList(const StudentList& that){
        this->_students = that.students();
    }

    const QList<Student> students() const { return _students;}
    void setStudents(const  QList<Student>& lstu){ _students = lstu;}
    void setStudents(const  QList<Student>&& lstu){ _students = lstu;}

    const QString desc() const { return _desc;}
    void setDesc(const QString& desc ){ _desc = desc;}
    void setDesc(const QString && desc){ _desc = desc;}

private:
    QList<Student> _students;
    QString _desc;
};
Q_DECLARE_METATYPE(StudentList)

int main(int argc, char *argv[])
{
    QApplication a(argc, argv);

    qRegisterMetaType<Student>("Student");
    qRegisterMetaType<StudentList>("StudentList");

    // Ojbect
    Student stu0("1001","zhaolei",22);
    stu0.setObjectName(QStringLiteral("学生0"));

    Student stu1("1002","cangjingkong",18); // 苍老师用永远18，没人能有意见吧
    stu1.setObjectName(QStringLiteral("学生1"));

    QList<Student> l;
    l.append(stu0);
    l.append(stu1);

    StudentList lstu(l);
    lstu.setDesc(QStringLiteral("三年一班学生信息"));

    for(const auto& stu : lstu.students()){
        QObject::connect(&stu,&Student::nameChanged,[](QString name){
            qDebug() << __FUNCTION__ << __LINE__ << "  namechanged : " << name;
        });
    }


    // UI bind Object
    QtPropertyEditor::QtPropertyTreeEditor tree_editor;
    tree_editor.treeModel.setMaxDepth(4);
    tree_editor.treeModel.propertyNames = QtPropertyEditor::getPropertyNames(&lstu);
    tree_editor.treeModel.setObject(&lstu);
    tree_editor.resizeColumnsToContents();
    tree_editor.show();

    return a.exec();
}

#include "main.moc"