使用QTreeWidget 模仿Qt Designer属性编辑器

QTreeWidget类提供了一个使用预定义树模型的视图，提供了一个标准的树小部件，带有一个经典的基于item的接口。这个类基于Qt的模型/视图体系结构，使用默认模型来保存项目，每个项目都是一个QTreeWidgetItem, 使得将数据的存储与其表示分离开来。

模仿qt ui设计属性界面

设置表头，为每一列设置标签。

void setHeaderLabels(const QStringList &labels)

单列可用下面的函数

void setHeaderLabel(const QString &label)

隐藏表头

void setHeaderHidden(bool hide)

展开所有项

void expandAll()

小部件内单击时，就会发出这个信号。

void itemClicked(QTreeWidgetItem *item, int column);

当指定项中的列的内容发生更改时，发出此信号。

void itemChanged(QTreeWidgetItem *item, int column);

追加顶级项

void addTopLevelItem(QTreeWidgetItem *item);

附加子项

void addChild(QTreeWidgetItem *child);

设置控件显示在给定项和列指定的单元格中

void setItemWidget(QTreeWidgetItem *item, int column, QWidget *widget);

删除给定列和给定项中的控件。

 inline void removeItemWidget(QTreeWidgetItem *item, int column);

     QStringList strList;
     strList<treeWidget->setHeaderLabels(strList);
     ui->treeWidget->setAlternatingRowColors(true);
     ui->treeWidget->expandAll();

     QTreeWidgetItem *item1 = new QTreeWidgetItem(QStringList()<<"QObject");
     ui->treeWidget->addTopLevelItem(item1);

     QTreeWidgetItem *item11 = new QTreeWidgetItem(QStringList()<<"name"<<"treeWidget");
     item1->addChild(item11);
     item11->setData(1,Qt::UserRole,QLINEEDIT);


     QTreeWidgetItem *item2 = new QTreeWidgetItem(QStringList()<<"QWidget");
     ui->treeWidget->addTopLevelItem(item2);

     QTreeWidgetItem *item21 = new QTreeWidgetItem(QStringList()<<"enabled");
     item2->addChild(item21);
     item21->setCheckState(1,Qt::Checked);

     QTreeWidgetItem *item22 = new QTreeWidgetItem(QStringList()<<"geomerty");
     item2->addChild(item22);

     QTreeWidgetItem* item221 = new QTreeWidgetItem(QStringList()<<"X"<<"10");
     item22->addChild(item221);
     item221->setData(1,Qt::UserRole,QDOUBLESPINBOX);

     QTreeWidgetItem *item222 = new QTreeWidgetItem(QStringList()<<"Y"<<"10");
     item22->addChild(item222);
     item222->setData(1,Qt::UserRole,QDOUBLESPINBOX);


     QTreeWidgetItem *item223 = new QTreeWidgetItem(QStringList()<addChild(item223);
     item223->setData(1,Qt::UserRole,QDOUBLESPINBOX);


     QTreeWidgetItem *item224 = new QTreeWidgetItem(QStringList()<addChild(item224);
     item224->setData(1,Qt::UserRole,QDOUBLESPINBOX);


     connect(ui->treeWidget, &QTreeWidget::itemPressed, this, [&](QTreeWidgetItem *item, int column){
     if(1 == column)
     {
         if(item->treeWidget() != NULL)
         {
            {
                if(QDOUBLESPINBOX == item->data(1,Qt::UserRole).toInt())
                {
                    QDoubleSpinBox *spinEditor = new QDoubleSpinBox();
                    double value = item->text(1).toDouble();
                    spinEditor->setValue(value);
                    spinEditor->setDecimals(1);
                    spinEditor->selectAll();
                    item->treeWidget()->setItemWidget(item, 1, spinEditor);
                }
                else if(QLINEEDIT == item->data(1,Qt::UserRole).toInt())
                {
                    QLineEdit *lineEdit = new QLineEdit();
                    QString text = item->text(1);
                    lineEdit->setText(text);
                    lineEdit->selectAll();
                    ui->treeWidget->setItemWidget(item, 1,lineEdit);
                }
            }
            item->treeWidget()->setFocus();
         }
     }
     else
         finshed(item);
     });

     connect(ui->treeWidget, &QTreeWidget::currentItemChanged, this, [&](QTreeWidgetItem *current, QTreeWidgetItem *previous){

         if (current == previous)
             return;
         finshed(previous);
     });

     connect(ui->treeWidget, &QTreeWidget::itemChanged , this, [&](QTreeWidgetItem *item){
         QString str = QString("%1:%2").arg(item->text(0)).arg(item->text(1));
         ui->textEdit->append(str);
     });