Python Arcade – 添加按钮

在本文中，我们将学习如何使用Python在 Arcade 中创建按钮。

添加按钮

在 Arcade 中，我们可以轻松地为游戏添加按钮。

为此，我们将使用一些函数：

界面管理器（）：

Syntax: arcade.gui.UIManager(window, auto_enable)

Parameters:

• window : Our game window
• auto_enable : Accepts a boolean value

UIBoxLayout():

Syntax: arcade.gui.UIBoxLayout(x, y, vertical, align, children, size)

Parameters:

• x : x coordinate of bottom left
• y : x coordinate of bottom left
• vertical : Layout children vertical (True) or horizontal (False)
• align : Align children in orthogonal direction (x: left, center, right / y: top, center, bottom)
• children : Initial children, more can be added
• size : A hint for UILayout, if this UIWidget would like to grow

UIFlatButton():

Syntax: arcade.gui.UIFlatButton( x, y, width, height, text, style)

Parameters:

• x : x-coordinate of widget.
• y  : y-coordinate of widget.
• width : width of widget. Defaults to texture width if not specified.
• height : height of widget. Defaults to texture height if not specified.
• text : text to add to the button.
• style : Used to style the button

现在要创建我们的按钮，我们将创建一个名为 MainClass 的类，在这个类中，我们将初始化 UIManager 的一个变量。之后，我们将使用 UIFlatButton() 创建我们的按钮，然后我们将在我们的 UIManager 中添加这个按钮。然后我们将创建一个 on_draw()函数来绘制我们的按钮。

下面是实现：

Python3

# Importing arcade module
import arcade
# Importing arcade gui
import arcade.gui
  
# Creating MainGame class
class MainGame(arcade.Window):
    def __init__(self):
        super().__init__(600, 600, title="Buttons")
  
        # Changing background color of screen
        arcade.set_background_color(arcade.color.BLUE)
  
        # Creating a UI MANAGER to handle the UI
        self.uimanager = arcade.gui.UIManager()
        self.uimanager.enable()
  
        # Creating Button using UIFlatButton
        start_button = arcade.gui.UIFlatButton(text="Start Game",
                                               width=200)
  
        # Adding button in our uimanager
        self.uimanager.add(
            arcade.gui.UIAnchorWidget(
                anchor_x="center_x",
                anchor_y="center_y",
                child=start_button)
        )
  
    # Creating on_draw() function to draw on the screen
  
    def on_draw(self):
        arcade.start_render()
          
        # Drawing our ui manager
        self.uimanager.draw()
  
  
# Calling MainGame class
MainGame()
arcade.run()

输出：

在按钮中添加功能

现在我们将创建一个 on_buttonclick()函数，每次用户按下按钮时都会调用该函数。

蟒蛇3

# Importing arcade module
import arcade
# Importing arcade gui
import arcade.gui
  
# Creating MainGame class
class MainGame(arcade.Window):
    def __init__(self):
        super().__init__(600, 600, title="Buttons")
  
        # Changing background color of screen
        arcade.set_background_color(arcade.color.BLUE)
  
        # Creating a UI MANAGER to handle the UI
        self.uimanager = arcade.gui.UIManager()
        self.uimanager.enable()
  
        # Creating Button using UIFlatButton
        start_button = arcade.gui.UIFlatButton(text="Start Game",
                                               width=200)
  
        # Assigning our on_buttonclick() function
        start_button.on_click = self.on_buttonclick
  
        # Adding button in our uimanager
        self.uimanager.add(
            arcade.gui.UIAnchorWidget(
                anchor_x="center_x",
                anchor_y="center_y",
                child=start_button)
        )
  
    # This function will be called everytime the user
    # presses the start button
    def on_buttonclick(self, event):
        print("Button is clicked")
  
    # Creating on_draw() function to draw on the screen
    def on_draw(self):
        arcade.start_render()
          
        # Drawing our ui manager
        self.uimanager.draw()
  
  
# Calling MainGame class
MainGame()
arcade.run()

输出：