音乐控制演示#
music_control_demo.py#
1"""
2If Python and Arcade are installed, this example can be run from the command line with:
3python -m arcade.examples.music_control_demo
4"""
5import arcade
6import arcade.gui
7import arcade.gui.widgets.buttons
8import arcade.gui.widgets.layout
9
10
11class MyView(arcade.View):
12 def __init__(self, my_window: arcade.Window):
13 super().__init__(my_window)
14
15 self.media_player = None
16 self.paused = True
17 self.songs = [":resources:music/funkyrobot.mp3",
18 ":resources:music/1918.mp3"]
19 self.cur_song_index = 0
20
21 self.my_music = arcade.load_sound(self.songs[self.cur_song_index])
22
23 # This creates a "manager" for all our UI elements
24 self.ui_manager = arcade.gui.UIManager(self.window)
25
26 box = arcade.gui.widgets.layout.UIBoxLayout(vertical=False, space_between=20)
27
28 # --- Start button
29 normal_texture = arcade.load_texture(":resources:onscreen_controls/flat_dark/"
30 "sound_off.png")
31 hover_texture = arcade.load_texture(":resources:onscreen_controls/shaded_dark/"
32 "sound_off.png")
33 press_texture = arcade.load_texture(":resources:onscreen_controls/shaded_dark/"
34 "sound_off.png")
35
36 # Create our button
37 self.start_button = arcade.gui.widgets.buttons.UITextureButton(
38 texture=normal_texture,
39 texture_hovered=hover_texture,
40 texture_pressed=press_texture,
41 )
42
43 # Map that button's on_click method to this view's on_button_click method.
44 self.start_button.on_click = self.start_button_clicked # type: ignore
45
46 # Add in our element.
47 box.add(self.start_button)
48
49 # --- Down button
50 press_texture = arcade.load_texture(":resources:onscreen_controls/shaded_dark/down.png")
51 normal_texture = arcade.load_texture(":resources:onscreen_controls/flat_dark/down.png")
52 hover_texture = arcade.load_texture(":resources:onscreen_controls/shaded_dark/down.png")
53
54 # Create our button
55 self.down_button = arcade.gui.widgets.buttons.UITextureButton(
56 texture=normal_texture,
57 texture_hovered=hover_texture,
58 texture_pressed=press_texture,
59 )
60
61 # Map that button's on_click method to this view's on_button_click method.
62 self.down_button.on_click = self.volume_down # type: ignore
63 self.down_button.scale(0.5)
64
65 # Add in our element.
66 box.add(self.down_button)
67
68 # --- Up button
69 press_texture = arcade.load_texture(":resources:onscreen_controls/shaded_dark/up.png")
70 normal_texture = arcade.load_texture(":resources:onscreen_controls/flat_dark/up.png")
71 hover_texture = arcade.load_texture(":resources:onscreen_controls/shaded_dark/up.png")
72
73 # Create our button
74 self.up_button = arcade.gui.widgets.buttons.UITextureButton(
75 texture=normal_texture,
76 texture_hovered=hover_texture,
77 texture_pressed=press_texture,
78 )
79
80 # Map that button's on_click method to this view's on_button_click method.
81 self.up_button.on_click = self.volume_up # type: ignore
82 self.up_button.scale(0.5)
83
84 # Add in our element.
85 box.add(self.up_button)
86
87 # --- Right button
88 press_texture = arcade.load_texture(":resources:onscreen_controls/shaded_dark/right.png")
89 normal_texture = arcade.load_texture(":resources:onscreen_controls/flat_dark/right.png")
90 hover_texture = arcade.load_texture(":resources:onscreen_controls/shaded_dark/right.png")
91
92 # Create our button
93 self.right_button = arcade.gui.widgets.buttons.UITextureButton(
94 texture=normal_texture,
95 texture_hovered=hover_texture,
96 texture_pressed=press_texture,
97 )
98
99 # Map that button's on_click method to this view's on_button_click method.
100 self.right_button.on_click = self.forward # type: ignore
101 self.right_button.scale(0.5)
102
103 # Add in our element.
104 box.add(self.right_button)
105
106 # Place buttons in the center of the screen using an UIAnchorWidget with default values
107 self.ui_manager.add(arcade.gui.widgets.layout.UIAnchorLayout(children=[box]))
108
109 def music_over(self):
110 self.media_player.pop_handlers()
111 self.media_player = None
112 self.sound_button_off()
113 self.cur_song_index += 1
114 if self.cur_song_index >= len(self.songs):
115 self.cur_song_index = 0
116 self.my_music = arcade.load_sound(self.songs[self.cur_song_index])
117 self.media_player = self.my_music.play()
118 self.media_player.push_handlers(on_eos=self.music_over)
119
120 def volume_down(self, *_):
121 if self.media_player and self.media_player.volume > 0.2:
122 self.media_player.volume -= 0.2
123
124 def volume_up(self, *_):
125 if self.media_player and self.media_player.volume < 1.0:
126 self.media_player.volume += 0.2
127
128 def forward(self, *_):
129 skip_time = 10
130
131 if self.media_player and self.media_player.time < self.my_music.get_length() - skip_time:
132 self.media_player.seek(self.media_player.time + 10)
133
134 def sound_button_on(self):
135 self.start_button.texture_pressed = \
136 arcade.load_texture(":resources:onscreen_controls/shaded_dark/sound_on.png")
137 self.start_button.texture = \
138 arcade.load_texture(":resources:onscreen_controls/flat_dark/sound_on.png")
139 self.start_button.texture_hovered = \
140 arcade.load_texture(":resources:onscreen_controls/shaded_dark/sound_on.png")
141
142 def sound_button_off(self):
143 self.start_button.texture_pressed = \
144 arcade.load_texture(":resources:onscreen_controls/shaded_dark/sound_off.png")
145 self.start_button.texture = \
146 arcade.load_texture(":resources:onscreen_controls/flat_dark/sound_off.png")
147 self.start_button.texture_hovered = \
148 arcade.load_texture(":resources:onscreen_controls/shaded_dark/sound_off.png")
149
150 def start_button_clicked(self, *_):
151 self.paused = False
152 if not self.media_player:
153 # Play button has been hit, and we need to start playing from the beginning.
154 self.media_player = self.my_music.play()
155 self.media_player.push_handlers(on_eos=self.music_over)
156 self.sound_button_on()
157 elif not self.media_player.playing:
158 # Play button hit, and we need to un-pause our playing.
159 self.media_player.play()
160 self.sound_button_on()
161 elif self.media_player.playing:
162 # We are playing music, so pause.
163 self.media_player.pause()
164 self.sound_button_off()
165
166 def on_draw(self):
167 self.clear()
168
169 # This draws our UI elements
170 self.ui_manager.draw()
171 arcade.draw_text("Music Demo",
172 x=0, y=self.window.height - 55,
173 width=self.window.width,
174 font_size=40,
175 align="center",
176 color=arcade.color.BLACK)
177
178 if self.media_player:
179 seconds = self.media_player.time
180 minutes = int(seconds // 60)
181 seconds = int(seconds % 60)
182 arcade.draw_text(f"Time: {minutes}:{seconds:02}",
183 x=10, y=10, color=arcade.color.BLACK, font_size=24)
184 volume = self.media_player.volume
185 arcade.draw_text(f"Volume: {volume:3.1f}",
186 x=10, y=50, color=arcade.color.BLACK, font_size=24)
187
188 def on_show_view(self):
189 self.window.background_color = arcade.color.ALMOND
190
191 # Registers handlers for GUI button clicks, etc.
192 # We don't really use them in this example.
193 self.ui_manager.enable()
194
195 def on_hide_view(self):
196 # This unregisters the manager's UI handlers,
197 # Handlers respond to GUI button clicks, etc.
198 self.ui_manager.disable()
199
200
201if __name__ == "__main__":
202 window = arcade.Window(title="Arcade Music Control Demo")
203 window.show_view(MyView(window))
204 arcade.run()