Question

我不确定Qt的模型/视图系统是如何工作的...他们声称qtreewidget小部件使用它，但我无法看到它的工作原理。

我想要做的是让qtreewidget节点指向数据对象，并覆盖UI用于显示数据的方法。有人可以告诉我如何覆盖这些方法吗？

这是我的数据对象......

class Car():
    def __init__(self, name="", age=0, children=None):
        self.name = name
        self.uid = str( uuid.uuid4( ) )
        self.age = age
        self.children = children if children is not None else []

我无法看到在哪里做这项工作，但理论上我觉得它看起来像这样：

class CustomTreeNode( QtGui.QTreeWidgetItem ):
    def __init__( self, parent, car ): # Only supply the car, you will see why down below
        super( CustomTreeNode, self ).__init__( parent )
        self.car_data = car

    def getText( self, col ):
        # Override whatever internal method the UI calls to query the text value before painting itself
        # --- this would always just reflect the Car instance's value instead of trying to synchronize all of the TreeItems

        return self.car_data.name


    def getFont( self, col ):
        # Likewise for painting the selected items bolded --

        # Over in your treewidget on selection changed events, you'd store off the selected cars:
        # --- self.selected_cars = set( [ item.car_data for item in event.selection ] )

        # Then here when the UI queries the font to render it would do something like this:

        if self.car_data in self.tree_widget.selected_cars:
              return FONTS.get_font("accent")
        else:
              return FONTS.get_font("regular")

用于qtreewidget的PyQt视图模型方法

0 个答案: