Qt QTreeWidget

最新推荐文章于 2025-10-22 08:00:00 发布

转载最新推荐文章于 2025-10-22 08:00:00 发布 · 1.1k 阅读

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#qt #layout #tree #signal #dialog #ui

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本文展示了一个使用Qt库中的QTreeWidget组件构建简单树形结构的实例。该示例创建了一个包含根节点及两个子节点的树形结构，并演示了如何通过信号槽机制响应用户的点击事件来更新界面上的标签内容。

1）dialogimpl.h

#ifndef DIALOGIMPL_H
#define DIALOGIMPL_H
//
#include <QDialog>
#include "ui_dialog.h"
#include "QHBoxLayout"
#include "QTreeWidget"
#include "QMessageBox"
#include "QLabel"
//
class DialogImpl : public QDialog, public Ui::Dialog
{
Q_OBJECT
public:
   DialogImpl( QWidget * parent = 0, Qt::WFlags f = 0 );
private:
   QHBoxLayout * layout;
   QLabel *label;
private slots:
   void GetItemText(QTreeWidgetItem* item);
};
#endif

2）dialogimpl.h

#include "dialogimpl.h"
//
DialogImpl::DialogImpl( QWidget * parent, Qt::WFlags f)
   : QDialog(parent, f)
{
   setupUi(this);
   this->setWindowTitle("QTreeWidget Demo");
   layout=new QHBoxLayout;
   label=new QLabel;
   label->setFixedWidth(50);
   layout->addWidget(label);

   QTreeWidget *tree=new QTreeWidget;
   tree->setColumnCount(2);
   QStringList headers;
   headers<<"name"<<"level";
   tree->setHeaderLabels(headers);

   QStringList rootText;
   rootText<<"father"<<"0";
   QTreeWidgetItem *root=new QTreeWidgetItem(rootText);
   tree->addTopLevelItem(root);

   QStringList subText1;
   subText1<<"sister"<<"1";
   QTreeWidgetItem *sub1=new QTreeWidgetItem(subText1);
   root->addChild(sub1);

   QStringList subText2;
   subText2<<"borther"<<"2";
   QTreeWidgetItem *sub2=new QTreeWidgetItem(subText2);
   root->addChild(sub2);

   root->setExpanded(true);
   layout->addWidget(tree);
   setLayout(layout);

   connect(tree,SIGNAL(itemClicked(QTreeWidgetItem*,int)),this,SLOT(GetItemText(QTreeWidgetItem*)));
}
void DialogImpl::GetItemText(QTreeWidgetItem* item)
{
   label->setText(item->text(0));
}
//