Python 一步一步教你用pyglet制作可播放音乐的扬声器类

���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：

import pygletwindow = pyglet.window.Window(800,500)batch = pyglet.graphics.Batch()color = (255, 255, 255)pi = 3.141592653589793arc = []x, y = 380, 250for 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.eventdef 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 pygletwindow = 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.eventdef 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 pygletwindow = 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.eventdef 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.eventdef 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