QTreeWidget-View¶

ui->treeWidget->setAutoExpandDelay(-1);//节点展开鼠标悬停时间
ui->treeWidget->setIndentation(10);//缩进字节（添加自定义图标用的）
ui->treeWidget->setRootIsDecorated(1);//第一列是否缩进（添加自定义图标用的）
ui->treeWidget->setUniformRowHeights(1);//强制所有项等高
ui->treeWidget->setItemsExpandable(1);//是否支持展开折叠
ui->treeWidget->setSortingEnabled(1);////是否支持自动排序（如果需要排序的表格一般都常常改变，建议别用QTreeWidget了）
ui->treeWidget->setAnimated(1);//是否支持动画，这个需要单独在定义显示动画
ui->treeWidget->setAllColumnsShowFocus(1);//选中是焦点在本格还是本行（节点）
ui->treeWidget->setWordWrap(1);//自动换行，如果文字太多想用...省略的话，用矩形框把qstring封一下在画
ui->treeWidget->setHeaderHidden(0);//是否显示标题，下边有一个Visible，区别在于Visible是隐藏Hidden是在内存销毁
ui->treeWidget->setExpandsOnDoubleClick(0);//双击是否可以展开子节点。其实如果有节点的话还是建议用mode/view

ui->treeWidget->setColumnCount(2);

    for (qint32 i = 0; i < ui->treeWidget->topLevelItemCount(); ++i) {
        QTreeWidgetItem *item = ui->treeWidget->topLevelItem(i);
        if (item) {
            item->setFlags(item->flags() | Qt::ItemIsEditable);
        }
    }

    for (qint32 i = 0; i < ui->treeWidget->topLevelItemCount(); ++i) {
        QTreeWidgetItem *item = ui->treeWidget->topLevelItem(i);
        if (item) {
            item->setFlags(item->flags() | Qt::ItemIsEditable);
        }
    }

Qt.NoItemFlags          0   没有设置任何属性。
Qt.ItemIsSelectable     1   可以选择。
Qt.ItemIsEditable       2   可以编辑。
Qt.ItemIsDragEnabled    4   可以拖动它。
Qt.ItemIsDropEnabled    8   它可以用作放置目标。
Qt.ItemIsUserCheckable  16  用户可以选中或取消选中它。
Qt.ItemIsEnabled        32  用户可以与项目交互。
Qt.ItemIsTristate       64  该项可通过三个独立的状态进行检查。

class DisableEditor : public QStyledItemDelegate {
  public:
    explicit DisableEditor(QWidget *parent = nullptr);

    virtual QWidget *createEditor(
        QWidget *parent,
        const QStyleOptionViewItem &option,
        const QModelIndex &index) const override ;
};
DisableEditor::DisableEditor(QWidget *parent)
    : QStyledItemDelegate(parent) {
}
QWidget *DisableEditor::createEditor(
    QWidget *parent, const QStyleOptionViewItem &option, const QModelIndex &index) const {
    Q_UNUSED(parent);
    Q_UNUSED(option);
    Q_UNUSED(index);
    return nullptr;
}

    for (qint32 i = 1; i < ui->treeWidget->columnCount(); ++i) {
        ui->treeWidget->setItemDelegateForColumn(
            i, new DisableEditor(ui->treeWidget));
    }

class KissQTreeWidget : public QTreeWidget {
    Q_OBJECT
  public:
    explicit KissQTreeWidget(QWidget *parent = nullptr);
    virtual ~KissQTreeWidget();
  protected:
    void Initial();
    virtual void contextMenuEvent(QContextMenuEvent *e);
    QMenu *context_menu_;
    QItemSelection selection_;
};

KissQTreeWidget::KissQTreeWidget(QWidget *parent): QTreeWidget(parent) {
    this->Initial();
}

KissQTreeWidget::~KissQTreeWidget() {
}

void KissQTreeWidget::Initial() {
    QStringList header_list = {"Tag ID", "VR", "VM", "Length", "Description", "value"};
    QList<int> headerwidth_list = {200, 70, 100, 50, 300, 300};
    this->setHeaderLabels(header_list);
    qint32 i = 0;
    foreach (auto var, headerwidth_list) {
        this->setColumnWidth(i, var);
        i++;
    }
    this->setGeometry(0, 0, 1200, 800);
    this->header()->setDefaultAlignment(Qt::AlignCenter);
    // 右键菜单
    this->context_menu_ = new QMenu(this);
    context_menu_->addAction(tr("Open the folder where DCM is located"), this, [ = ]() {
    });
    context_menu_->addAction(tr("Copy current selection"), this, [ = ]() {
    });
    context_menu_->addSeparator();
    context_menu_->addAction(tr("Copy all values"), this, [ = ]() {
    });
}

void KissQTreeWidget::contextMenuEvent(QContextMenuEvent *e) {
    if (indexAt(e->pos()).isValid()) {
        context_menu_->popup(e->globalPos());
    }
}

void DicomTagsWidget::SlotFilterChanged() {
    QTreeWidgetItemIterator it(tree_wid_);
    QString str = ui.filter->text();
    if(str.isEmpty()) {
        while (*it) {
            (*it)->setHidden(false);
            ++it;
        }
        return;
    }
    while (*it) {
        (*it)->setHidden(true);
        ++it;
    }
    QList<QTreeWidgetItem *> items;
    for(qint32 i = 0; i < tree_wid_->columnCount(); i++) {
        items << tree_wid_->findItems(str, Qt::MatchContains | Qt::MatchRecursive, i);
    }
    foreach (auto var, items) {
        var->setHidden(false);
        while (var->parent()) {
            var->parent()->setHidden(false);
            var = var->parent();
        }
    }
}

QWidget *ComboxDelegate::createEditor(QWidget *parent, const QStyleOptionViewItem & /*option*/, const QModelIndex &index) const
{
    QComboBox *editor = new QComboBox(parent);
    editor->addItems(item_list_);
    editor->installEventFilter(const_cast<ComboxDelegate *>(this));

    connect(editor, static_cast<void (QComboBox::*)(int)>(&QComboBox::activated),
            this, [&, index](int data) {
                model_->setData(index, data, Qt::EditRole);
            });

    return editor;
}