DreamLife_MusicPlayer/musicplayer.py

import sys
import os
import pygame
import time
import re
from PyQt6.QtWidgets import (
    QApplication, QMainWindow, QWidget, QVBoxLayout, QLabel,
    QPushButton, QSlider, QHBoxLayout
)
from PyQt6.QtCore import QTimer, Qt, QSize, QPropertyAnimation, QPoint
from PyQt6.QtGui import QPixmap, QIcon, QPalette, QColor

class MusicPlayer(QMainWindow):
    def __init__(self):
        super().__init__()
        self.setWindowTitle("DreamLife|MusicPlayer")
        self.setGeometry(300, 200, 400, 500)
        self.initUI()
        pygame.mixer.init()

        self.lyrics = []                # 解析后的歌词列表 [(时间戳, 歌词)]
        self.current_lyric_index = 0    # 当前歌词索引
        self.is_playing = False         # 播放状态
        self.music_length = 0           # 音乐总时长（秒）
        self.start_time = 0             # 播放开始时间（用于计算已播放时间）
        self.pause_time = 0             # 暂停时记录的播放进度（秒）
        self.animation = None           # 存储滚动动画对象
        self.last_lyric = None          # 上一次显示的歌词，用于避免重复启动动画
        self.load_lyrics()

    def initUI(self):
        self.central_widget = QWidget()
        self.setCentralWidget(self.central_widget)
        self.layout = QVBoxLayout()
        self.layout.setAlignment(Qt.AlignmentFlag.AlignCenter)
        self.central_widget.setLayout(self.layout)

        # 设置背景颜色
        self.set_background_color("#2E2E2E")

        # 封面
        self.cover_label = QLabel()
        self.layout.addWidget(self.cover_label, alignment=Qt.AlignmentFlag.AlignCenter)
        self.load_cover()

        # 歌词显示区域（固定大小容器，便于动画处理，不随内容改变大小）
        self.lyrics_container = QWidget()
        self.lyrics_container.setFixedSize(300, 50)
        self.lyrics_container.setStyleSheet("background-color: transparent;")
        # 歌词标签放置在容器中
        self.lyrics_browser = QLabel("", self.lyrics_container)
        self.lyrics_browser.setAlignment(Qt.AlignmentFlag.AlignCenter)
        self.lyrics_browser.setStyleSheet("font-size: 24px; color: white; font-weight: bold;")
        self.lyrics_browser.setFixedHeight(50)
        self.lyrics_browser.move(0, 0)
        self.layout.addWidget(self.lyrics_container, alignment=Qt.AlignmentFlag.AlignCenter)

        # 进度条
        self.slider = QSlider(Qt.Orientation.Horizontal)
        self.slider.setRange(0, 100)
        self.slider.sliderPressed.connect(self.pause_music)
        self.slider.sliderReleased.connect(self.seek_music)
        self.layout.addWidget(self.slider)

        # 播放控制区域
        self.control_layout = QHBoxLayout()
        self.control_layout.setAlignment(Qt.AlignmentFlag.AlignCenter)
        self.play_button = QPushButton()
        self.play_button.setIcon(QIcon("file/play.png"))
        self.play_button.setIconSize(QSize(52, 52))  # 明确设置图标尺寸
        self.play_button.setStyleSheet("border: none;")
        self.play_button.clicked.connect(self.toggle_play_pause)
        self.control_layout.addWidget(self.play_button)
        self.layout.addLayout(self.control_layout)

        # 定时器，每500毫秒更新一次进度和歌词
        self.timer = QTimer(self)
        self.timer.timeout.connect(self.update_lyrics_and_progress)

    def set_background_color(self, color):
        palette = self.palette()
        palette.setColor(QPalette.ColorRole.Window, QColor(color))
        self.setPalette(palette)
        self.central_widget.setStyleSheet(f"background-color: {color};")

    def load_cover(self):
        cover_path = "file/cover.jpg"
        if os.path.exists(cover_path):
            pixmap = QPixmap(cover_path)
            self.cover_label.setPixmap(pixmap.scaled(256, 256, Qt.AspectRatioMode.KeepAspectRatio))
        else:
            self.cover_label.setText("封面未找到")

    def load_lyrics(self):
        lyrics_path = "file/林俊杰-光阴副本.lrc"
        if os.path.exists(lyrics_path):
            try:
                with open(lyrics_path, 'r', encoding='utf-8') as file:
                    lines = file.readlines()
                self.lyrics = []
                for line in lines:
                    match = re.match(r"\[(\d+):(\d+\.\d+)](.*)", line)
                    if match:
                        minutes = int(match.group(1))
                        seconds = float(match.group(2))
                        timestamp = minutes * 60 + seconds
                        lyrics_text = match.group(3).strip()
                        self.lyrics.append((timestamp, lyrics_text))
                self.lyrics.sort()
            except Exception as e:
                self.lyrics_browser.setText("加载歌词出错: " + str(e))
        else:
            self.lyrics_browser.setText("歌词文件未找到")

    def toggle_play_pause(self):
        if not self.is_playing:
            if self.pause_time > 0:
                self.resume_music()
            else:
                self.play_music()
        else:
            self.pause_music()

    def play_music(self):
        music_path = "file/林俊杰-光阴副本.wav"
        if os.path.exists(music_path):
            try:
                pygame.mixer.music.load(music_path)
                pygame.mixer.music.play(start=0)
                self.music_length = pygame.mixer.Sound(music_path).get_length()
                self.start_time = time.time()
                self.pause_time = 0
                self.timer.start(500)
                self.play_button.setIcon(QIcon("file/pause.png"))
                self.is_playing = True
            except Exception as e:
                print("播放音乐时出错:", e)
        else:
            print("音乐文件未找到:", music_path)

    def resume_music(self):
        try:
            pygame.mixer.music.unpause()  # 直接恢复播放
            self.start_time = time.time() - self.pause_time
            self.timer.start(500)
            self.play_button.setIcon(QIcon("file/pause.png"))
            self.is_playing = True
        except Exception as e:
            print("继续播放时出错:", e)

    def pause_music(self):
        if self.is_playing:
            self.pause_time = time.time() - self.start_time
            pygame.mixer.music.pause()
            self.timer.stop()
            self.play_button.setIcon(QIcon("file/play.png"))
            self.is_playing = False

    def seek_music(self):
        if self.music_length > 0:
            new_time = self.slider.value() / 100 * self.music_length
            pygame.mixer.music.play(start=new_time)
            self.start_time = time.time() - new_time
            self.pause_time = new_time
            self.current_lyric_index = self.find_lyric_index(new_time)
            self.update_lyrics_display()
            self.timer.start(500)
            self.play_button.setIcon(QIcon("file/pause.png"))
            self.is_playing = True

    def find_lyric_index(self, current_time):
        for i, (timestamp, _) in enumerate(self.lyrics):
            if current_time < timestamp:
                return max(i - 1, 0)
        return len(self.lyrics) - 1

    def update_lyrics_display(self):
        if self.current_lyric_index < len(self.lyrics):
            _, lyric = self.lyrics[self.current_lyric_index]
            # 仅当歌词发生变化时再更新（避免重复重启动画）
            if self.last_lyric != lyric:
                self.last_lyric = lyric
                # 如果歌词宽度超过容器，则滚动显示
                if self.lyrics_browser.fontMetrics().horizontalAdvance(lyric) > self.lyrics_container.width():
                    self.scroll_lyrics(lyric)
                else:
                    if self.animation is not None:
                        self.animation.stop()
                        self.animation = None
                    self.lyrics_browser.setText(lyric)
                    self.lyrics_browser.adjustSize()
                    self.lyrics_browser.move((self.lyrics_container.width() - self.lyrics_browser.width()) // 2, 0)

    def scroll_lyrics(self, lyric):
        self.lyrics_browser.setText(lyric)
        self.lyrics_browser.adjustSize()
        label_width = self.lyrics_browser.width()
        container_width = self.lyrics_container.width()
        start_pos = QPoint(50, 0)
        end_pos = QPoint(-label_width, 0)
        if self.animation is not None:
            self.animation.stop()
        self.animation = QPropertyAnimation(self.lyrics_browser, b"pos")
        # 根据歌词长度调整滚动时间
        duration = 8000 + (label_width - container_width) * 20
        self.animation.setDuration(duration)
        self.animation.setStartValue(start_pos)
        self.animation.setEndValue(end_pos)
        self.animation.start()

    def update_lyrics_and_progress(self):
        elapsed_time = time.time() - self.start_time
        self.current_lyric_index = self.find_lyric_index(elapsed_time)
        self.update_lyrics_display()
        if self.music_length > 0:
            progress = int((elapsed_time / self.music_length) * 100)
            self.slider.setValue(progress)

if __name__ == '__main__':
    app = QApplication(sys.argv)
    player = MusicPlayer()
    player.show()
    sys.exit(app.exec())