Qt QTreeView 加 自定义Model实现自定义树形控件

Qt很好很强大，我很喜欢

研究完hello Qt后，开始自己开发一个小东西，Tree控件，

首先是Node类：

node.h

 

#ifndef NODE_H#define NODE_Hclass Node{public: enum Type{ Root, FileName }; Node(Type type,const QString &str = ""); ~Node(); Type type; QString str; Node *parent; QList<Node *> children;};#endif // NODE_H

 

node.cpp

#include <QtGui>#include "node.h"Node::Node(Type type,const QString &str){ this->type = type; this->str = str; this->parent = 0;}Node::~Node(){ qDeleteAll(this->children);}

 

node对象中包含 root，filename两种类型

widget.h

 

#ifndef QFILETREEWIDGET_H#define QFILETREEWIDGET_H#include <QTreeView>class Node;class FileTreeModel;class QFileTreeWidget : public QWidget{ Q_OBJECTpublic: QFileTreeWidget(); ~QFileTreeWidget(); //void setMyModel();private: //QModelIndex index; FileTreeModel *model; QTreeView *view;};#endif // QFILETREEWIDGET_H

 

widget.cpp

#include <QtGui>#include "booleanmodel.h"#include "booleanparser.h"#include "booleanwindow.h"BooleanWindow::BooleanWindow(){ label = new QLabel(tr("Boolean expression:")); lineEdit = new QLineEdit; booleanModel = new BooleanModel(this); treeView = new QTreeView; treeView->setModel(booleanModel); connect(lineEdit, SIGNAL(textChanged(const QString &)), this, SLOT(booleanExpressionChanged(const QString &))); QGridLayout *layout = new QGridLayout; layout->addWidget(label, 0, 0); layout->addWidget(lineEdit, 0, 1); layout->addWidget(treeView, 1, 0, 1, 2); setLayout(layout); setWindowTitle(tr("Boolean Parser"));}void BooleanWindow::booleanExpressionChanged(const QString &expr){ BooleanParser parser; Node *rootNode = parser.parse(expr); booleanModel->setRootNode(rootNode);}

 

在main函数中调用

 

QApplication app(argc, argv); BooleanWindow window; window.show(); return app.exec();