qt treeview
时间: 2023-10-27 07:34:56 浏览: 37
Qt TreeView is a widget in the Qt graphical user interface framework that displays hierarchical data in a tree-like structure. It is commonly used to represent file systems, directories, and other hierarchical data structures. The TreeView widget provides a flexible and customizable way to display and manipulate tree data. It supports drag and drop operations, editing of cells, and various selection modes. In addition, it provides several standard item models, such as the QFileSystemModel, which can be used to display the contents of a file system in a tree-like structure. The TreeView widget can be used in both C++ and Qt Quick applications.
相关问题
qt treeview 自动换行
要实现Qt TreeView中的自动换行,可以通过自定义ItemDelegate来实现。以下是一个简单的示例:
```python
class WrappedTextDelegate(QtWidgets.QStyledItemDelegate):
def paint(self, painter, option, index):
# 获取项数据
text = index.data(Qt.DisplayRole)
# 获取项矩形框
rect = option.rect
# 计算文本矩形框
text_rect = painter.boundingRect(rect, Qt.TextWordWrap, text)
# 如果文本超过项矩形框,则调整项矩形框的高度
if text_rect.height() > rect.height():
rect.setHeight(text_rect.height())
# 绘制文本
painter.drawText(rect, Qt.TextWordWrap, text)
def sizeHint(self, option, index):
# 获取项数据
text = index.data(Qt.DisplayRole)
# 获取项矩形框
rect = option.rect
# 计算文本矩形框
text_rect = QtGui.QFontMetrics(option.font).boundingRect(rect, Qt.TextWordWrap, text)
# 如果文本超过项矩形框,则调整项矩形框的高度
if text_rect.height() > rect.height():
rect.setHeight(text_rect.height())
return rect.size()
```
然后在TreeView中设置ItemDelegate即可:
```python
delegate = WrappedTextDelegate()
treeView.setItemDelegate(delegate)
```
qt treeview怎么添加数据
在Qt中,可以使用QTreeView来显示树形结构的数据,并且可以通过添加数据来动态更新TreeView。下面是一种常见的方法来添加数据到Qt TreeView:
1. 创建一个QStandardItemModel对象,用于存储和管理数据。
```cpp
QStandardItemModel *model = new QStandardItemModel(this);
```
2. 创建根节点,并将其添加到模型中。
```cpp
QStandardItem *rootItem = model->invisibleRootItem();
```
3. 创建子节点,并设置其数据。
```cpp
QStandardItem *childItem = new QStandardItem("Child Item");
```
4. 将子节点添加到根节点中。
```cpp
rootItem->appendRow(childItem);
```
5. 将模型设置给QTreeView控件。
```cpp
QTreeView *treeView = new QTreeView(this);
treeView->setModel(model);
```
这样就完成了向Qt TreeView添加数据的过程。你可以根据需要重复步骤3和步骤4来添加更多的子节点。