Python 一步一步教你用pyglet制作可播放音乐的扬声器类

目录

扬声器类

1. 绘制喇叭

2. 扬声器类

3. 禁音状态 

4. 设置状态

5. 切换状态

6. 播放音乐

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扬声器类

1. 绘制喇叭

本篇将教你用pyglet画一个小喇叭，如上图。这里要用到pyglety库shapes模块中的圆弧Arc和多边形Pylygon画出这个扬声器的图片：

Arc(x, y, radius, segments=None, angle=6.283185307179586, start_angle=0, closed=False, color=(255, 255, 255, 255), batch=None, group=None)

x,y 是圆弧的圆心坐标；radius 是半径；

angle是圆心角的弧度数；

start_angle是圆弧起始的弧度数，以水平线起始时，值为0；

圆弧控件没有表示粗细的参数，只能多画几个同心圆弧来加粗。

Polygon(*coordinates, color=(255, 255, 255, 255), batch=None, group=None)

coordinates是多边形的各个端点的坐标列表，也可以写成元组方式；

多边形控件是填充形状，没有粗细参数也不能只画边线。

代码如下：

1. import pyglet
3. window = pyglet.window.Window(800,500)
4. batch = pyglet.graphics.Batch()
6. color = (255, 255, 255)
7. pi = 3.141592653589793
8. arc = []
9. x, y = 380, 250
10. for i in [*range(6),*range(18,24),*range(36,42)]:
11. arc.append(pyglet.shapes.Arc(x=x, y=y, radius=50-i/2, angle=pi/2, start_angle=-pi/4, color=color, batch=batch))
13. coordinates = [x+10, y+8], [x, y+8], [x, y-8], [x+10, y-8], [x+16, y-14], [x+16, y+14]
14. polygon = pyglet.shapes.Polygon(*coordinates, color=color, batch=batch)
17. @window.event
18. def on_draw():
19. window.clear()
20. batch.draw()
22. pyglet.app.run()

2. 扬声器类

改写为一个类便于调用，可以画在任意坐标处：

class Speaker:
    def __init__(self, x, y, color=(255, 255, 255)):
        self.arc = []
        pi = 3.141592653589793
        for i in [*range(6),*range(18,24),*range(36,42)]:
                self.arc.append(pyglet.shapes.Arc(x=x, y=y, radius=50-i/2, angle=pi/2, start_angle=-pi/4, color=color, batch=batch))
        coordinates = [x+10, y+8], [x, y+8], [x, y-8], [x+10, y-8], [x+16, y-14], [x+16, y+14]
        self.polygon = pyglet.shapes.Polygon(*coordinates, color=color, batch=batch)

调用代码：

1. import pyglet
3. window = pyglet.window.Window(800,500)
4. batch = pyglet.graphics.Batch()
6. class Speaker:
7. def __init__(self, x, y, color=(255, 255, 255)):
8. self.arc = []
9. pi = 3.141592653589793
10. for i in [*range(6),*range(18,24),*range(36,42)]:
11. self.arc.append(pyglet.shapes.Arc(x=x, y=y, radius=50-i/2, angle=pi/2, start_angle=-pi/4, color=color, batch=batch))
12. coordinates = [x+10, y+8], [x, y+8], [x, y-8], [x+10, y-8], [x+16, y-14], [x+16, y+14]
13. self.polygon = pyglet.shapes.Polygon(*coordinates, color=color, batch=batch)
15. @window.event
16. def on_draw():
17. window.clear()
18. batch.draw()
20. speaker1 = Speaker(380, 250)
21. speaker2 = Speaker(600, 360)
22. pyglet.app.run()

运行效果：

3. 禁音状态 

再加两条红色直线表示禁音状态，shapes.Line用法：

Line(x, y, x2, y2, width=1, color=(255, 255, 255, 255), batch=None, group=None)

x,y, x2,y2 为直线两端点的坐标；

width为直线粗细，缺省默认值为1，直线控件有粗细的。

代码如下：

1. import pyglet
3. window = pyglet.window.Window(800,500)
4. batch = pyglet.graphics.Batch()
6. class Speaker:
7. def __init__(self, x, y, color=(255, 255, 255)):
8. self.arc = []
9. pi = 3.141592653589793
10. for i in [*range(6),*range(18,24),*range(36,42)]:
11. self.arc.append(pyglet.shapes.Arc(x=x, y=y, radius=50-i/2, angle=pi/2, start_angle=-pi/4, color=color, batch=batch))
12. coordinates = [x+10, y+8], [x, y+8], [x, y-8], [x+10, y-8], [x+16, y-14], [x+16, y+14]
13. self.polygon = pyglet.shapes.Polygon(*coordinates, color=color, batch=batch)
14. self.line1 = pyglet.shapes.Line(x, y-24, x+48, y+24, width=3, color=(255, 0, 0), batch=batch)
15. self.line2 = pyglet.shapes.Line(x, y+24, x+48, y-24, width=3, color=(255, 0, 0), batch=batch)
17. @window.event
18. def on_draw():
19. window.clear()
20. batch.draw()
22. speaker1 = Speaker(380, 250)
23. speaker2 = Speaker(600, 360)
24. pyglet.app.run()

运行效果：

4. 设置状态

再为Speaker类增加两个属性和一个方法，用于设置状态：

        self.line1.visible = Flase
        self.line2.visible = Flase

    def enabled(self, enabled=True):
        self.line1.visible = self.line2.visible = not enabled

调用代码：

1. import pyglet
3. window = pyglet.window.Window(800,500)
4. batch = pyglet.graphics.Batch()
6. class Speaker:
7. def __init__(self, x, y, color=(255, 255, 255)):
8. self.arc = []
9. pi = 3.141592653589793
10. for i in [*range(6),*range(18,24),*range(36,42)]:
11. self.arc.append(pyglet.shapes.Arc(x=x, y=y, radius=50-i/2, angle=pi/2, start_angle=-pi/4, color=color, batch=batch))
12. coordinates = [x+10, y+8], [x, y+8], [x, y-8], [x+10, y-8], [x+16, y-14], [x+16, y+14]
13. self.polygon = pyglet.shapes.Polygon(*coordinates, color=color, batch=batch)
14. self.line1 = pyglet.shapes.Line(x, y-24, x+48, y+24, width=3, color=(255, 0, 0), batch=batch)
15. self.line2 = pyglet.shapes.Line(x, y+24, x+48, y-24, width=3, color=(255, 0, 0), batch=batch)
16. self.line1.visible = self.line2.visible = False
17. def set_enabled(self, enabled=True):
18. self.line1.visible = self.line2.visible = not enabled
20. @window.event
21. def on_draw():
22. window.clear()
23. batch.draw()
25. speaker1 = Speaker(380, 250)
26. speaker2 = Speaker(600, 360)
27. speaker2.set_enabled(False)
29. pyglet.app.run()

运行效果：

5. 切换状态

继续增加鼠标点击切换状态的功能，增加属性和方法：

属性：

        self.x = x
        self.y = y
        self.enabled = True

方法：
    def set_enabled(self, enabled=True):
        self.enabled = enabled
        self.line1.visible = self.line2.visible = not enabled
    def on_mouse_over(self, x, y):
        return self.x <= x <= self.x+50 and self.y-35 <= y <= self.y+35

增加鼠标点击事件：

@window.event
def on_mouse_press(x, y, button, modifier):
    if speaker1.on_mouse_over(x,y):
        speaker1.enabled = not speaker1.enabled
        speaker1.set_enabled(speaker1.enabled)
    if speaker2.on_mouse_over(x,y):
        speaker2.enabled = not speaker2.enabled
        speaker2.set_enabled(speaker2.enabled)

运行效果：分别点击两个图标，就能各自切换状态

6. 播放音乐

使用 media 模块调入mp3音乐，配合Speaker类播放

media = pyglet.media.load('voice1.mp3')
sound = pyglet.media.Player()
sound.queue(media)
sound.loop = True
sound.play()

鼠标事件中增加音乐播放和暂停的代码：

@window.event
def on_mouse_press(x, y, button, modifier):
    if speaker.on_mouse_over(x,y):
        speaker.enabled = not speaker.enabled
        speaker.set_enabled(speaker.enabled)
        if speaker.enabled:
            sound.play()
        else:
            sound.pause() 

完整代码：

1. import pyglet
3. window = pyglet.window.Window(800,500)
4. batch = pyglet.graphics.Batch()
6. class Speaker:
7. def __init__(self, x, y, color=(255, 255, 255)):
8. self.arc = []
9. pi = 3.141592653589793
10. for i in [*range(6),*range(18,24),*range(36,42)]:
11. self.arc.append(pyglet.shapes.Arc(x=x, y=y, radius=50-i/2, angle=pi/2, start_angle=-pi/4, color=color, batch=batch))
12. coordinates = [x+10, y+8], [x, y+8], [x, y-8], [x+10, y-8], [x+16, y-14], [x+16, y+14]
13. self.polygon = pyglet.shapes.Polygon(*coordinates, color=color, batch=batch)
14. self.line1 = pyglet.shapes.Line(x, y-24, x+48, y+24, width=3, color=(255, 0, 0), batch=batch)
15. self.line2 = pyglet.shapes.Line(x, y+24, x+48, y-24, width=3, color=(255, 0, 0), batch=batch)
16. self.line1.visible = self.line2.visible = False
17. self.x = x
18. self.y = y
19. self.enabled = True
20. def set_enabled(self, enabled=True):
21. self.enabled = enabled
22. self.line1.visible = self.line2.visible = not enabled
23. def on_mouse_over(self, x, y):
24. return self.x <= x <= self.x+50 and self.y-35 <= y <= self.y+35
26. @window.event
27. def on_draw():
28. window.clear()
29. batch.draw()
31. @window.event
32. def on_mouse_press(x, y, button, modifier):
33. if speaker.on_mouse_over(x,y):
34. speaker.enabled = not speaker.enabled
35. speaker.set_enabled(speaker.enabled)
36. if speaker.enabled:
37. sound.play()
38. else:
39. sound.pause()
41. speaker = Speaker(720, 450)
43. media = pyglet.media.load('voice1.mp3')
44. sound = pyglet.media.Player()
45. sound.queue(media)
46. sound.loop = True
47. sound.play()
49. pyglet.app.run()

运行代码后，就能播放音乐了，点击扬声器图标可以切换音乐的播放和暂停状态。

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