QListWidget与QTreeWidget的用法

1、dialog.h：头文件

#ifndef DIALOG_H
#define DIALOG_H

#include <QDialog>
#include <QLabel>
#include <QLineEdit>
#include <QTextEdit>
#include <QPushButton>
#include <QListWidget>
#include <QTreeWidget>

class Dialog : public QDialog
{
    Q_OBJECT
    
public:
    Dialog(QWidget *parent = 0);
    ~Dialog();
    
    void init();
    void initLayout();
    
private:
    QListWidget *_lstWgt;
    QTreeWidget *_treeWgt;
};

#endif // DIALOG_H

2、dialog.cpp：源文件

#include "dialog.h"
#include <QHBoxLayout>
#include <QListWidgetItem>
#include <QTreeWidgetItem>

Dialog::Dialog(QWidget *parent)
    : QDialog(parent)
{
    init();
    initLayout();
}

Dialog::~Dialog()
{
}

void Dialog::init()
{
    _lstWgt = new QListWidget;
    _lstWgt->setFixedSize(QSize(300, 300));
    _lstWgt->setStyleSheet(tr("QListWidget{font:20px solid;color:rgb(20,20,20);border:none;border-radius:4px;show-decoration-selected:1;}"
                              "QListWidget::item{color:rgba(20,20,20,250);background:transparent;border:none;padding-left:12px;padding-top:5px;padding-bottom:5px;}"
                              "QListWidget::item:hover{color:rgba(250,250,250,250);background:qlineargradient(x1:0,y1:0,x2:0,y2:1,stop:0 rgba(1,8,156,220),stop:1 rgba(1,91,179,220));border:none;}"
                              "QListWidget::item:selected{color:rgba(250,250,250,250);background:qlineargradient(x1:0,y1:0,x2:0,y2:1,stop:0 rgba(1,8,156,220),stop:1 rgba(1,91,179,220));border:none;}"
                              "QListWidget::item:selected:!active{color:rgba(250,250,250,250);background:qlineargradient(x1:0,y1:0,x2:0,y2:1,stop:0 rgba(1,8,156,220),stop:1 rgba(1,91,179,220));border:none;}"));
    
    for (int i = 0; i < 20; ++i) {
        QListWidgetItem *pItem = new QListWidgetItem(tr(""));
        pItem->setSizeHint(QSize(300, 50));
        _lstWgt->insertItem(i, pItem);
        
        //QLabel *lbl = new QLabel(tr("江枫渔火对愁眠"));
        //_lstWgt->setItemWidget(pItem, lbl);
        
        QTextEdit *pEdt = new QTextEdit(tr("姑苏城外寒山寺"));
        pEdt->setReadOnly(true);
        pEdt->setFocusPolicy(Qt::NoFocus);
        pEdt->viewport()->setCursor(Qt::PointingHandCursor);
        pEdt->setStyleSheet("font:22px solid;background-color:transparent;color:#1f1f1f;border:none;border-radius:4px;");
        _lstWgt->setItemWidget(pItem, pEdt);
    }
    
    _treeWgt = new QTreeWidget;
    _treeWgt->setHeaderHidden(true);
    _treeWgt->setFixedSize(QSize(300, 300));
    _treeWgt->setColumnCount(1);
    
    for (int i = 0; i < 10; ++i) {
        QTreeWidgetItem *pTreeItem = new QTreeWidgetItem(_treeWgt);
        pTreeItem->setText(0, tr("一级菜单：%1").arg(i + 1));
        _treeWgt->addTopLevelItem(pTreeItem);
        
        for (int j = 0; j < 3; ++j) {
            QTreeWidgetItem *child = new QTreeWidgetItem(QStringList() << tr("二级菜单：%1").arg(j + 1));
            pTreeItem->addChild(child);
        }
    }
    
    _treeWgt->expandAll();
}

void Dialog::initLayout()
{
    QHBoxLayout *hLay = new QHBoxLayout(this);
    hLay->setMargin(12);
    hLay->setSpacing(16);
    hLay->addWidget(_lstWgt);
    hLay->addWidget(_treeWgt);
}

3、运行界面：