pyglet -- 视频播放器 （简单实现，效果不是太好，切换资源会卡死)（三）

实现一个简单的视频播放器，效果不是很好。这里不多说，直接贴代码了。

 #-*- coding:gbk -*-
 import pyglet
 import os
 from pyglet.gl import *

 def draw_rec(x,y,width,height):
     """
     矩形
     """
     glLoadIdentity()
     glPushMatrix()
     glBegin(GL_LINE_LOOP)
     glVertex2f(x,y)
     glVertex2f(x+width,y)
     glVertex2f(x+width,y+height)
     glVertex2f(x,y+height)
     glEnd()
     glPopMatrix()

 class Button(pyglet.event.EventDispatcher):

     def __init__(self):
         super(Button,self).__init__()
         self.x=y=0  #按钮的位置以及大小
         self.width=height=10
         self.hit=False  #按钮是否被鼠标点击
         self._text=pyglet.text.Label('',anchor_x='center',anchor_y='center')   #初始化是必要的,必须写在__init__中，不然给他赋文本值会当成全局量，最终显示的按钮的文本是最后一个赋值（即，作为私有量）

     def draw(self):
         """
         画按钮
         """
         if self.hit:
             glColor3f(0.0,1.0,0.0)
         draw_rec(self.x,self.y,self.width,self.height)
         glColor3f(1.0,1.0,1.0)
         self.draw_label()
     def set_text(self,button_text):
         """
         改变按钮的文本
         """
         self._text.text=button_text
     button_text=property(lambda self: self._text.text,set_text)
     def set_size(self,x,y,width,height):
         """
         改变按钮的位置和大小
         """
         self.x=x
         self.y=y
         self.width=width
         self.height=height

     def on_mouse_press(self,x,y,button,modifiers):
         self.dispatch_event('on_press')   #调度事件
         self.hit=True  #鼠标点击，颜色变化
     def on_mouse_drag(self,x,y,dx,dy,button,modifiers):
         """
         拖动
         """
         self.dispatch_event('on_value_change')
     def on_mouse_release(self,x,y,button,modifiers):
         self.dispatch_event('on_release')
         self.hit=False  #释放鼠标，恢复颜色
     def draw_label(self):
         """
         添加标签
         """
         self._text.x=self.x+self.width/2
         self._text.y=self.y+self.height/2
         self._text.draw()
     def hit_test(self,x,y):
         return (self.x<x<self.x+self.width and self.y < y < self.y+self.height)

 #注册事件类型
 Button.register_event_type('on_press')
 Button.register_event_type('on_value_change')
 Button.register_event_type('on_release')

 class Player(pyglet.media.Player):
     x=y=0
     width=height=10

     def load_source(self,path):
         """
         载入视频资源
         """
         resource_path=[path]
         pyglet.resource.path=resource_path
         pyglet.resource.reindex()
         if path:
             for root,dirname,files in os.walk(path):
                 for f in files:
                     source=pyglet.resource.media(f)
                     self.queue(source)
     def set_locate(self,x,y):
         """
         设置播放器的位置
         """
         self.x=x
         self.y=y
     def get_and_set_video_size(self):
         """
         获取视频的大小并设置播放器的长宽
         """
         if self.source and self.source.video_format:
             self.width=self.source.video_format.width
             self.height=self.source.video_format.height
         if self.source.video_format.sample_aspect>1:
             self.width*=self.source.video_format.sample_aspect
         else:
             self.height/=self.source.video_format.sample_aspect

 class MyPlayer(pyglet.window.Window):
     def __init__(self,caption):
         super(MyPlayer,self).__init__(caption=caption,resizable=True)
         self.padding=10  #默认的间距以及长宽
         self.width=50
         self.height=30

         #下面列出要显示的列表
         self.drawable=[]  #显示列表

         #播放器
         self.player=Player()
         self.player.load_source('E:\music')
         self.player.set_locate(0,self.padding*2+30)  #播放器显示位置
         self.player.get_and_set_video_size()  #得到视频的大小并设置
         self.player.EOS_NEXT='next'  #按顺序进行播放
         self.player.push_handlers(self)

         #播放/暂停控制按钮
         self.play_pause_control=Button()
         self.play_pause_control.width=50
         self.play_pause_control.height=30
         self.play_pause_control.set_size(self.padding,self.padding,self.play_pause_control.width,self.play_pause_control.height)  #位置以及大小
         self.play_pause_control.button_text='play'  #文本设置
         self.play_pause_control.on_press=lambda:self.on_play_pause()
         self.drawable.append(self.play_pause_control)  #将这个按钮加入到显示列表中

         #全屏控制按钮
         self.isscreenfull=Button()
         self.isscreenfull.width=50
         self.isscreenfull.height=30
         self.isscreenfull.set_size(self.padding*2+self.play_pause_control.width,self.padding,self.isscreenfull.width,self.isscreenfull.height)
         self.isscreenfull.button_text='全屏'
         self.isscreenfull.on_press=lambda: self.set_fullscreen(True)
         self.drawable.append(self.isscreenfull)

     def on_draw(self):
         self.clear()
         #显示播放器
         if self.player.source and self.player.source.video_format:
             self.player.get_texture().blit((self.width-self.player.width)/2,self.player.y,width=self.player.width,height=self.player.height) #注意这里width=,height=不能省略，否则画面不会出现的

         #画列表中所有的控制按钮
         if self.drawable:
             for draw_c in self.drawable:
                 draw_c.draw()
     def on_mouse_press(self,x,y,button,modifiers):
         for dc in self.drawable:
             if dc.hit_test(x,y):
                 dc.on_mouse_press(x,y,button,modifiers)
     def on_play_pause(self):
         if self.player.playing:
             self.player.pause()
             self.play_pause_control.set_text('pause')
         else:
             if self.player.time > self.player.source.duration:
                 self.player.seek(0)
             self.player.play()
             self.play_pause_control.set_text('play')
     def on_mouse_release(self,x,y,button,modifiers):
         for dc in self.drawable:
             if dc.hit_test(x,y):
                 dc.on_mouse_release(x,y,button,modifiers)
     def on_resize(self,width,height):
         super(MyPlayer,self).on_resize(width,height)
         if self.player.source:
             video_width,video_height=self.player.width,self.player.height

         display_aspect=width/float(height)
         video_aspect=video_width/float(video_height)

         if video_aspect>display_aspect:
             self.player.width=width
             self.player.height=width/video_aspect
         else:
             self.player.height=height
             self.player.width=height * video_aspect
         self.player.x=(width-self.player.width)/2
         self.player.y=(height-self.player.height)/2

 if __name__ == "__main__":
     wn=MyPlayer('my player')
     wn.set_size(int(wn.player.width),int(wn.player.height)) #将窗口的大小设置的和视频一样大小
     wn.set_visible(True)  #可见
     wn.player.play()
 pyglet.app.run()