在QTreeView小部件中更改图标,您可以按照以下步骤操作:
下面是一个示例代码,演示如何在QTreeView小部件中更改图标:
from PyQt5.QtCore import Qt, QModelIndex, QAbstractItemModel, QVariant
from PyQt5.QtGui import QIcon
class CustomModel(QAbstractItemModel):
def __init__(self, data, parent=None):
super(CustomModel, self).__init__(parent)
self.rootItem = data
def index(self, row, column, parent=QModelIndex()):
if not self.hasIndex(row, column, parent):
return QModelIndex()
if not parent.isValid():
parentItem = self.rootItem
else:
parentItem = parent.internalPointer()
childItem = parentItem.child(row)
if childItem:
return self.createIndex(row, column, childItem)
else:
return QModelIndex()
def parent(self, index):
if not index.isValid():
return QModelIndex()
childItem = index.internalPointer()
parentItem = childItem.parentItem()
if parentItem == self.rootItem:
return QModelIndex()
return self.createIndex(parentItem.row(), 0, parentItem)
def rowCount(self, parent=QModelIndex()):
if parent.column() > 0:
return 0
if not parent.isValid():
parentItem = self.rootItem
else:
parentItem = parent.internalPointer()
return parentItem.childCount()
def columnCount(self, parent=QModelIndex()):
if parent.isValid():
return parent.internalPointer().columnCount()
else:
return self.rootItem.columnCount()
def data(self, index, role=Qt.DisplayRole):
if not index.isValid():
return QVariant()
if role == Qt.DisplayRole or role == Qt.EditRole:
item = index.internalPointer()
return item.data(index.column())
if role == Qt.DecorationRole:
if index.column() == 0:
item = index.internalPointer()
icon = item.icon()
if icon:
return QIcon(icon)
return QVariant()
def setData(self, index, value, role=Qt.EditRole):
if role == Qt.EditRole:
item = index.internalPointer()
if index.column() == 0:
item.setIcon(value)
self.dataChanged.emit(index, index)
return True
return False
class TreeItem:
def __init__(self, data, parent=None):
self.parentItem = parent
self.itemData = data
self.childItems = []
self.itemIcon = None
def appendChild(self, item):
self.childItems.append(item)
def child(self, row):
return self.childItems[row]
def childCount(self):
return len(self.childItems)
def columnCount(self):
return len(self.itemData)
def data(self, column):
if column < len(self.itemData):
return self.itemData[column]
return None
def parentItem(self):
return self.parentItem
def row(self):
if self.parentItem:
return self.parentItem.childItems.index(self)
return 0
def icon(self):
return self.itemIcon
def setIcon(self, icon):
self.itemIcon = icon
if __name__ == "__main__":
import sys
from PyQt5.QtWidgets import QApplication, QTreeView, QVBoxLayout, QWidget
app = QApplication(sys.argv)
window = QWidget()
layout = QVBoxLayout(window)
# 创建自定义模型
rootItem = TreeItem(["Name", "Size"])
childItem1 = TreeItem(["File1.txt", "10 KB"], rootItem)
childItem2 = TreeItem(["File2.txt", "20 KB"], rootItem)
rootItem.appendChild(childItem1)
rootItem.appendChild(childItem2)
model = CustomModel(rootItem)
# 创建QTreeView小部件
treeView = QTreeView()
treeView.setModel(model)
# 更改图标
model.setData(model.index(0, 0), QIcon("folder.png"), Qt.EditRole)
layout.addWidget(treeView)
window.show()
sys.exit(app.exec_())
在上面的示例中,我们创建了一个自定义的模型(CustomModel),并在其中存储了文件的名称和大小数据。我们通过重写data()和setData()方法来返回和设置图标数据。在主程序中,我们创建了一个QTreeView小部件,并将自定义模型设置给它。我们通过调用setData()方法来更改第一个项的图标。
请注意,此示例仅演示了如何更改一个项的图标。根据您的实际需求,您可以根据需要修改模型和视图,并为不同的项提供不同的图标。
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