Panda3D中创建按钮、文本框、添加按钮点击事件

[python]代码库

from panda3d.core import TextNode
from direct.gui.DirectGui import *

class MyApp(ShowBase):
    def __init__(self):
        ShowBase.__init__(self)

        # Create a button
        self.button = DirectButton(text=("Click me!"),
                                    scale=.1,
                                    command=self.onButtonClicked)
        self.button.reparentTo(self.aspect2d)
        self.button.setPos(0, 0, -.5)

        # Create a text box
        self.textNode = TextNode("text")
        self.textNode.setText("Hello, world!")
        self.textNodePath = aspect2d.attachNewNode(self.textNode)
        self.textNodePath.setScale(0.07)
        self.textNodePath.setPos(0, 0, 0.1)

    def onButtonClicked(self):
        self.textNode.setText("Button clicked!")