我的QTreeWidgetIcons在哪里？

Question

我有一个QTreeWidget带QTreeWidgetItem项目,但只有根节点显示其图标:

我一直在摸不着什么可以把它关掉,任何提示？

  ui->folderTree1->setUpdatesEnabled( false );

  QTreeWidgetItem* treeRoot1 = new QTreeWidgetItem(ui->folderTree1);
  treeRoot1->setIcon(0, QIcon(":/icons/black.png"));
  treeRoot1->setText(0, tr("Root"));
  treeRoot1->setExpanded(true);
  addFoldersToTreeView(treeRoot1, ui->filePath1->text(), ui->filePath2->text());

  ui->folderTree1->setUpdatesEnabled( true );
}

void MainWindow::addFoldersToTreeView(QTreeWidgetItem* currentWidget, QString leftPath, QString rightPath)
{
  qDebug() << "MainWindow::addFoldersToTreeView" << leftPath;
  QDir dir(leftPath);
  QDir dir2(rightPath);
  /* Add the folders */
  foreach (QString subDir, dir.entryList(QDir::Dirs | QDir::NoDotAndDotDot))
  {
    QString sImageName = ":/icons/black.png";
    QTreeWidgetItem* newItem = new QTreeWidgetItem(currentWidget);
    qDebug() << "MainWindow::addFoldersToTreeView.sImageName" << sImageName;
    newItem->setIcon(0, QIcon(sImageName));
    newItem->setText(0, subDir);
    newItem->setExpanded(true);
    newItem->setData(0, 1, QVariant(leftPath + QDir::separator() + subDir));
    /* Recursively add sub-folders */
    addFoldersToTreeView(newItem, leftPath + QDir::separator() + subDir, rightPath + QDir::separator() + subDir);
  }

Answer 1

问题是这条线:

newItem->setData(0, 1, QVariant(leftPath + QDir::separator() + subDir));

第二个参数是项数据角色,您指定为1(Qt :: DecorationRole).Qt :: DecorationRole应该用于以图标形式呈现为装饰的数据,即,此行将导致您之前指定的图标被替换为QVariant对象.

删除该行或将项目数据角色更改为其他内容.