学习QT——GUI的基础用法(2)

１、listWidget列表

在构造函数里面添加：

    for (int i=0; i<9; i++)
    {
        ui->listWidget->addItem(QString::number(i)+"item here");
    }

在pushbutton里面添加

void Dialog::on_pushButton_clicked()
{
//    QListWidgetItem *itm = ui->listWidget->currentItem();
//    itm->setText("Fuzzy Bunny of doom");
//    itm->setTextColor(Qt::red);
//    itm->setBackgroundColor(Qt::black);
    
    ui->listWidget->currentItem()->setText("Fuzzy Bunny of doom");
    ui->listWidget->currentItem()->setTextColor(Qt::red);
    ui->listWidget->currentItem()->setBackgroundColor(Qt::black);
}

２、QTreeWidget

现在dialog.h里面声明两个新的函数

void AddRoot(QString name, QString Description);
void AddChild(QTreeWidgetItem *parent, QString name, QString Description);

在在dialog.cpp里面实现这两个函数

void Dialog::AddRoot(QString name, QString Description)
{
    QTreeWidgetItem *itm = new QTreeWidgetItem(ui->treeWidget);
    itm->setText(0,name);
    itm->setText(1,Description);
    ui->treeWidget->addTopLevelItem(itm);

    AddChild(itm, "one", "hello");
    AddChild(itm, "two", "world");
}

void Dialog::AddChild(QTreeWidgetItem *parent, QString name, QString Description)
{
    QTreeWidgetItem *itm = new QTreeWidgetItem();
    itm->setText(0,name);
    itm->setText(1,Description);
    parent->addChild(itm);
}

在Dialog的构造函数中加入

    ui->treeWidget->setColumnCount(2);
    AddRoot("1 Hello","1 world");
    AddRoot("2 Hello","2 world");
    AddRoot("3 Hello","3 world");