创建QTreeWidget组件

文章来源：blog.csdn.net/free_progra…

 #ifndef DIALOG_H

 #define DIALOG_H

 #include <QDialog> 

 #include<QTreeWidgetItem> 

namespace Ui {

class Dialog; 

 } 

class Dialog : public QDialog

 {

 Q_OBJECT

public: 

 explicit Dialog(QWidget *parent = 0); 

 ~Dialog(); 

private slots: 

 void on_pushButton_clicked(); 

private: 

 Ui::Dialog *ui; 

private: 

 void addRoot(QString name); 

 void add_Child(QTreeWidgetItem* parent, QString name); 

 }; 

 #endif // DIALOG_H

 //实现

 #include "dialog.h" 
 #include "ui_dialog.h" 
 #include<QFont> 
 #include<QMessageBox> 
Dialog::Dialog(QWidget *parent) : 
 QDialog(parent), 
 ui(new Ui::Dialog) 
 {
 ui->setupUi(this); 
 //创建三个顶级目录
 addRoot("Root Level One"); 
 addRoot("Root Level Two"); 
 addRoot("Root Level Three"); 
 } 
Dialog::~Dialog() 
 {
 delete ui; 
 } 
void Dialog:: addRoot(QString name) 
 {
 QTreeWidgetItem *itm = new QTreeWidgetItem(ui->treeWidget);//传递父对象
 itm->setText(0,name); 
 QFont serifFont("Times", 10, QFont::Bold); 
 itm->setFont(0, serifFont); 
 itm->setWhatsThis(0, "Root Level Tree"); 
 ui->treeWidget->addTopLevelItem(itm);//把item添加为顶层
 //添加6个child组件
 add_Child(itm, "One Level"); 
 add_Child(itm, "Two Level"); 
 add_Child(itm, "Three Level"); 
 add_Child(itm, "Four Level"); 
 add_Child(itm, "Five Level"); 
 add_Child(itm, "Six Level"); 
 } 
void Dialog:: add_Child(QTreeWidgetItem* parent, QString name) 
 {
 //创建组件
 QTreeWidgetItem *itm = new QTreeWidgetItem(); 
 itm->setText(0,name); 
 
 //设置字体
 QFont childFont; 
 childFont.setWeight(QFont::Black); 
 childFont.setStyle(QFont::StyleOblique); 
 childFont.setUnderline(true); 
 itm->setFont(0, childFont); 
 itm->setBackgroundColor(0,Qt::gray); 
 itm->setTextColor(0,Qt::red); 
 //把上面定义好的组件以child的形式添加到顶级组件中
 parent->addChild(itm); 
 } 


void Dialog::on_pushButton_clicked() 
 {
 	
 ui->treeWidget->currentItem()->setBackgroundColor(0, Qt::cyan); 
 } 

 //测试

 #include <QtGui/QApplication> 
 #include "dialog.h" 
int main(int argc, char *argv[]) 
 {
 QApplication a(argc, argv); 
 Dialog w; 
 w.show(); 
 
 return a.exec(); 
 } 
 
 //结果
 

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