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
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：
import pyglet
window = pyglet.window.Window(800,500)
batch = pyglet.graphics.Batch()
color = (255, 255, 255)
pi = 3.141592653589793
arc = []
x, y = 380, 250
for i in [*range(6),*range(18,24),*range(36,42)]:
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]
polygon = pyglet.shapes.Polygon(*coordinates, color=color, batch=batch)
@window.event
def on_draw():
window.clear()
batch.draw()
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：
import pyglet
window = pyglet.window.Window(800,500)
batch = pyglet.graphics.Batch()
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)
@window.event
def on_draw():
window.clear()
batch.draw()
speaker1 = Speaker(380, 250)
speaker2 = Speaker(600, 360)
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：
import pyglet
window = pyglet.window.Window(800,500)
batch = pyglet.graphics.Batch()
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)
self.line1 = pyglet.shapes.Line(x, y-24, x+48, y+24, width=3, color=(255, 0, 0), batch=batch)
self.line2 = pyglet.shapes.Line(x, y+24, x+48, y-24, width=3, color=(255, 0, 0), batch=batch)
@window.event
def on_draw():
window.clear()
batch.draw()
speaker1 = Speaker(380, 250)
speaker2 = Speaker(600, 360)
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：
import pyglet
window = pyglet.window.Window(800,500)
batch = pyglet.graphics.Batch()
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)
self.line1 = pyglet.shapes.Line(x, y-24, x+48, y+24, width=3, color=(255, 0, 0), batch=batch)
self.line2 = pyglet.shapes.Line(x, y+24, x+48, y-24, width=3, color=(255, 0, 0), batch=batch)
self.line1.visible = self.line2.visible = False
def set_enabled(self, enabled=True):
self.line1.visible = self.line2.visible = not enabled
@window.event
def on_draw():
window.clear()
batch.draw()
speaker1 = Speaker(380, 250)
speaker2 = Speaker(600, 360)
speaker2.set_enabled(False)
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：
import pyglet
window = pyglet.window.Window(800,500)
batch = pyglet.graphics.Batch()
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)
self.line1 = pyglet.shapes.Line(x, y-24, x+48, y+24, width=3, color=(255, 0, 0), batch=batch)
self.line2 = pyglet.shapes.Line(x, y+24, x+48, y-24, width=3, color=(255, 0, 0), batch=batch)
self.line1.visible = self.line2.visible = False
self.x = x
self.y = y
self.enabled = True
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
@window.event
def on_draw():
window.clear()
batch.draw()
@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()
speaker = Speaker(720, 450)
media = pyglet.media.load('voice1.mp3')
sound = pyglet.media.Player()
sound.queue(media)
sound.loop = True
sound.play()
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。
完
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