Qt項目視圖便捷類實例

1、QTableWidget

QTableWidget爲單元表格，視圖如下:

程序結構如下：

void QUICreator::initTableWidget()
{
    //設置列數和列寬
    int width = qApp->desktop()->availableGeometry().width() - 120;
    //availableGeometry爲返回屏幕的可用幾何圖形大小
    ui->tableWidget->setColumnCount(5);//tableWidget爲實例
    ui->tableWidget->setColumnWidth(0, width * 0.06);
    ui->tableWidget->setColumnWidth(1, width * 0.10);
    ui->tableWidget->setColumnWidth(2, width * 0.06);
    ui->tableWidget->setColumnWidth(3, width * 0.10);
    ui->tableWidget->setColumnWidth(4, width * 0.15);
    ui->tableWidget->verticalHeader()->setDefaultSectionSize(25);

    QStringList headText;
    headText << "設備編號" << "設備名稱" << "設備地址" << "告警內容" << "告警時間";
    ui->tableWidget->setHorizontalHeaderLabels(headText);
    ui->tableWidget->setSelectionBehavior(QAbstractItemView::SelectRows);
    ui->tableWidget->setEditTriggers(QAbstractItemView::NoEditTriggers);
    ui->tableWidget->setSelectionMode(QAbstractItemView::SingleSelection);
    ui->tableWidget->setAlternatingRowColors(true);
    ui->tableWidget->verticalHeader()->setVisible(false);
    ui->tableWidget->horizontalHeader()->setStretchLastSection(true);

    ui->tableWidget->setRowCount(300);
    for (int i = 0; i < 300; i++) {
        ui->tableWidget->setRowHeight(i, 24);
        //設置行高
        QTableWidgetItem *itemDeviceID = new QTableWidgetItem(QString::number(i + 1));//將i+1轉化爲字符串
        QTableWidgetItem *itemDeviceName = new QTableWidgetItem(QString("測試設備%1").arg(i + 1));
        QTableWidgetItem *itemDeviceAddr = new QTableWidgetItem(QString::number(i + 1));
        QTableWidgetItem *itemContent = new QTableWidgetItem("防區告警");
        QTableWidgetItem *itemTime = new QTableWidgetItem(QDateTime::currentDateTime().toString("yyyy-MM-dd hh:mm:ss"));

        ui->tableWidget->setItem(i, 0, itemDeviceID);
        //爲第i+1行第1列添加itemDeviceID
        ui->tableWidget->setItem(i, 1, itemDeviceName);
        ui->tableWidget->setItem(i, 2, itemDeviceAddr);
        ui->tableWidget->setItem(i, 3, itemContent);
        ui->tableWidget->setItem(i, 4, itemTime);
    }
}

2、QTreeWidget

QTreeWidget爲多層次的樹結構，視圖如下：

程序結構如下：

void QUICreator::initTreeWidget()//QUICreator爲類
{
    ui->treeWidget->clear();//treeWidget爲實例
    ui->treeWidget->setHeaderLabel(" 樹狀列表控件");

    QTreeWidgetItem *group1 = new QTreeWidgetItem(ui->treeWidget);
    group1->setText(0, "父元素1");
    group1->setFlags(Qt::ItemIsUserCheckable |Qt::ItemIsEnabled | Qt::ItemIsSelectable);
    group1->setCheckState(0, Qt::PartiallyChecked);

    QTreeWidgetItem *subItem11 = new QTreeWidgetItem(group1);
    subItem11->setFlags(Qt::ItemIsUserCheckable | Qt::ItemIsEnabled | Qt::ItemIsSelectable);
    subItem11->setText(0, "子元素1");
    subItem11->setCheckState(0, Qt::Checked);

    QTreeWidgetItem *subItem12 = new QTreeWidgetItem(group1);
    subItem12->setFlags(Qt::ItemIsUserCheckable | Qt::ItemIsEnabled | Qt::ItemIsSelectable);
    subItem12->setText(0, "子元素2");
    subItem12->setCheckState(0, Qt::Unchecked);

    QTreeWidgetItem *subItem13 = new QTreeWidgetItem(group1);
    subItem13->setFlags(Qt::ItemIsUserCheckable | Qt::ItemIsEnabled | Qt::ItemIsSelectable);
    subItem13->setText(0, "子元素3");
    subItem13->setCheckState(0, Qt::Unchecked);

    QTreeWidgetItem *group2 = new QTreeWidgetItem(ui->treeWidget);
    group2->setText(0, "父元素2");
    group2->setFlags(Qt::ItemIsUserCheckable | Qt::ItemIsEnabled | Qt::ItemIsSelectable);
    group2->setCheckState(0, Qt::Unchecked);

    QTreeWidgetItem *subItem21 = new QTreeWidgetItem(group2);
    subItem21->setFlags(Qt::ItemIsUserCheckable | Qt::ItemIsEnabled | Qt::ItemIsSelectable);
    subItem21->setText(0, "子元素1");
    subItem21->setCheckState(0, Qt::Unchecked);

    QTreeWidgetItem *subItem211 = new QTreeWidgetItem(subItem13);
    subItem211->setFlags(Qt::ItemIsUserCheckable | Qt::ItemIsEnabled | Qt::ItemIsSelectable);
    subItem211->setText(0, "子子元素1");
    subItem211->setCheckState(0, Qt::Unchecked);

    ui->treeWidget->expandAll();//展開所有Tree表
}

3、QListWidget

QListWidget爲列表，視圖如下：

程序結構簡要如下：

void QUICreator::initListWidget()
{
    QStringList items;
    for (int i = 1,j=2; i,j <= 30; i=i+2,j=j+2) {
        items << QString("元素%1").arg(i);
        items<<QString("大傻逼%1").arg(j);
    }
    ui->listWidget->addItems(items);//listWidget爲實例
    ui->cbox1->addItems(items);
    ui->cbox2->addItems(items);
}