# -*- coding: utf-8 -*- """预览组件：大图查看器 + 音频播放器 + 文本查看器。""" from __future__ import annotations import os from PySide6.QtCore import QPoint, QRectF, Qt, QUrl, QTimer, Signal from PySide6.QtGui import QPainter, QPixmap from PySide6.QtMultimedia import QAudioOutput, QMediaPlayer from PySide6.QtWidgets import ( QHBoxLayout, QLabel, QPushButton, QScrollArea, QSlider, QTextEdit, QVBoxLayout, QWidget, ) from .. import thumbnail as thumb_mod from .theme import BG_CARD, BG_INPUT, BORDER, FG, FG_DIM, FG_FAINT, RADIUS # --------------------------------------------------------------------------- # 大图查看器（独立窗口，支持缩放 / 平移 / 翻页） # --------------------------------------------------------------------------- class _Canvas(QWidget): """可缩放平移的图片画布。""" def __init__(self, parent=None): super().__init__(parent) self._pix = QPixmap() self._zoom = 1.0 self._offset = QPoint(0, 0) self._drag = False self._last = QPoint() self.setMinimumSize(400, 300) self.setStyleSheet(f"background: #0E0F13; border-radius: 8px;") self.setMouseTracking(True) def set_image(self, pix: QPixmap): self._pix = pix self._zoom = 1.0 self._fit() self.update() def _fit(self): if self._pix.isNull() or self.width() < 10: return s = min(self.width() / self._pix.width(), self.height() / self._pix.height()) self._zoom = min(s, 1.0) self._center() def _center(self): w = self._pix.width() * self._zoom h = self._pix.height() * self._zoom self._offset = QPoint((self.width() - w) // 2, (self.height() - h) // 2) def wheelEvent(self, e): delta = e.angleDelta().y() factor = 1.15 if delta > 0 else 1 / 1.15 self.set_zoom(self._zoom * factor) e.accept() def set_zoom(self, z: float): self._zoom = max(0.05, min(z, 20.0)) self.update() def paintEvent(self, e): p = QPainter(self) p.setRenderHint(QPainter.RenderHint.SmoothPixmapTransform) if self._pix.isNull(): p.setPen(FG_FAINT) p.drawText(self.rect(), Qt.AlignmentFlag.AlignCenter, "无图片") return target_w = self._pix.width() * self._zoom target_h = self._pix.height() * self._zoom p.drawPixmap(QRectF(self._offset.x(), self._offset.y(), target_w, target_h), self._pix, self._pix.rect()) def mousePressEvent(self, e): if e.button() == Qt.MouseButton.LeftButton: self._drag = True self._last = e.position().toPoint() def mouseMoveEvent(self, e): if self._drag: d = e.position().toPoint() - self._last self._offset += d self._last = e.position().toPoint() self.update() def mouseReleaseEvent(self, e): self._drag = False def resizeEvent(self, e): if self._pix and self._zoom <= 1.0 and not self._drag: self._fit() self.update() super().resizeEvent(e) class ImageViewer(QWidget): """图片预览容器：画布 + 工具条（放大/缩小/适应/原始/翻页）。""" prev_clicked = Signal() next_clicked = Signal() zoom_changed = Signal(float) def __init__(self, parent=None): super().__init__(parent) lay = QVBoxLayout(self) lay.setContentsMargins(0, 0, 0, 0) lay.setSpacing(4) self.canvas = _Canvas(self) lay.addWidget(self.canvas, 1) bar = QWidget(self) bl = QHBoxLayout(bar) bl.setContentsMargins(8, 4, 8, 4) bl.setSpacing(4) def btn(text, slot, tip=""): b = QPushButton(text, bar) b.setObjectName("Ghost") b.setFixedHeight(26) b.setToolTip(tip) b.clicked.connect(slot) return b bl.addWidget(btn("‹", self.prev_clicked.emit, "上一页 (←)")) bl.addWidget(btn("−", self._zoom_out, "缩小")) self.zoom_lbl = QLabel("100%", bar) self.zoom_lbl.setAlignment(Qt.AlignmentFlag.AlignCenter) self.zoom_lbl.setMinimumWidth(46) self.zoom_lbl.setStyleSheet(f"color: {FG_DIM}; font-size: 11px;") bl.addWidget(self.zoom_lbl) bl.addWidget(btn("+", self._zoom_in, "放大")) bl.addWidget(btn("适应", self._fit, "适应窗口 (F)")) bl.addWidget(btn("原始", self._actual, "原始大小 (1)")) bl.addStretch(1) bl.addWidget(btn("›", self.next_clicked.emit, "下一页 (→)")) lay.addWidget(bar) self._player = None def show_image(self, path: str): pix = QPixmap(path) if pix.isNull(): self.canvas.set_image(QPixmap()) self.info = "" else: self.canvas.set_image(pix) self.info = f"{pix.width()} × {pix.height()}" self.zoom_changed.emit(self.canvas._zoom) self.zoom_lbl.setText(f"{self.canvas._zoom * 100:.0f}%") def _zoom_in(self): self.canvas.set_zoom(self.canvas._zoom * 1.25) self.zoom_lbl.setText(f"{self.canvas._zoom * 100:.0f}%") self.zoom_changed.emit(self.canvas._zoom) def _zoom_out(self): self.canvas.set_zoom(self.canvas._zoom / 1.25) self.zoom_lbl.setText(f"{self.canvas._zoom * 100:.0f}%") self.zoom_changed.emit(self.canvas._zoom) def _fit(self): self.canvas._fit() self.canvas.update() self.zoom_lbl.setText(f"{self.canvas._zoom * 100:.0f}%") def _actual(self): self.canvas._zoom = 1.0 self.canvas._center() self.canvas.update() self.zoom_lbl.setText("100%") # --------------------------------------------------------------------------- # 音频播放器 # --------------------------------------------------------------------------- class AudioPlayer(QWidget): """音频播放器：进度条 + 播放/暂停 + 时间 + 音量。 基于 QMediaPlayer；文件不可播放时降级为提示。 """ def __init__(self, path: str = "", parent=None): super().__init__(parent) self.setFixedHeight(108) self.setStyleSheet(f"background: {BG_CARD}; border: 1px solid {BORDER};" f" border-radius: {RADIUS}px;") lay = QVBoxLayout(self) lay.setContentsMargins(14, 10, 14, 10) lay.setSpacing(8) top = QHBoxLayout() self.name_lbl = QLabel("音频", self) self.name_lbl.setStyleSheet(f"color: {FG}; font-weight: 600; font-size: 13px;") self.dur_lbl = QLabel("—", self) self.dur_lbl.setStyleSheet(f"color: {FG_FAINT}; font-size: 11px;") self.dur_lbl.setAlignment(Qt.AlignmentFlag.AlignRight) top.addWidget(self.name_lbl, 1) top.addWidget(self.dur_lbl) lay.addLayout(top) row = QHBoxLayout() row.setSpacing(8) self.btn_play = QPushButton("▶ 播放", self) self.btn_play.setFixedWidth(88) self.btn_play.setFixedHeight(28) self.btn_play.clicked.connect(self.toggle) self.time_lbl = QLabel("00:00", self) self.time_lbl.setStyleSheet(f"color: {FG_DIM}; font-size: 11px;") self.time_lbl.setFixedWidth(40) self.scrubber = QSlider(Qt.Orientation.Horizontal, self) self.scrubber.setFixedHeight(20) self.scrubber.setRange(0, 0) self.scrubber.valueChanged.connect(self._on_scrub) row.addWidget(self.btn_play) row.addWidget(self.time_lbl) row.addWidget(self.scrubber, 1) lay.addLayout(row) self._player = QMediaPlayer() self._output = QAudioOutput() self._player.setAudioOutput(self._output) self._player.durationChanged.connect(self._on_duration) self._player.positionChanged.connect(self._on_position) self._player.errorOccurred.connect(self._on_error) self._player.mediaStatusChanged.connect(self._on_status) self._volume_slider = QSlider(Qt.Orientation.Horizontal, self) self._volume_slider.setRange(0, 100) self._volume_slider.setValue(80) self._volume_slider.setFixedWidth(90) self._volume_slider.valueChanged.connect( lambda v: self._output.setVolume(v / 100.0)) self._volume_slider.setFixedHeight(14) lay.addLayout(self._build_volume_row()) self._seeking = False self._path = "" if path: self.load(path) def _build_volume_row(self): r = QHBoxLayout() lbl = QLabel("🔊", self) lbl.setStyleSheet(f"color: {FG_DIM}; font-size: 12px;") r.addWidget(lbl) r.addWidget(self._volume_slider) r.addStretch(1) return r def load(self, path: str): self._path = path self.name_lbl.setText(os.path.basename(path) or "音频") d = thumb_mod.audio_duration(path) self.dur_lbl.setText(f"时长 {thumb_mod._format_duration(d)}" if d else "") if os.path.exists(path): self._player.setSource(QUrl.fromLocalFile(path)) def toggle(self): if not self._path: return if self._player.playbackState() == QMediaPlayer.PlaybackState.PlayingState: self._player.pause() else: self._player.play() def _sync_button(self): if self._player.playbackState() == QMediaPlayer.PlaybackState.PlayingState: self.btn_play.setText("⏸ 暂停") else: self.btn_play.setText("▶ 播放") def _on_duration(self, ms): self._player.positionChanged.disconnect(self._on_position) self.scrubber.setRange(0, ms) self._player.positionChanged.connect(self._on_position) self.dur_lbl.setText(f"时长 {thumb_mod._format_duration(ms / 1000)}") def _on_position(self, ms): if not self._seeking: self.scrubber.setValue(ms) self.time_lbl.setText(thumb_mod._format_duration(ms / 1000)) self._sync_button() def _on_scrub(self, v): if self._player.playbackState() == QMediaPlayer.PlaybackState.PlayingState: self._seeking = True self._player.setPosition(v) QTimer.singleShot(150, lambda: setattr(self, "_seeking", False)) def _on_error(self, error, msg): self.dur_lbl.setText("无法播放") self.btn_play.setEnabled(False) def _on_status(self, status): self._sync_button() def stop(self): if self._player: self._player.stop() # --------------------------------------------------------------------------- # 文本查看器 # --------------------------------------------------------------------------- class TextViewer(QScrollArea): """文本内容查看器（只读）。""" def __init__(self, parent=None): super().__init__(parent) self.setWidgetResizable(True) w = QWidget() w.setStyleSheet(f"background: {BG_INPUT}; border-radius: 8px;") lay = QVBoxLayout(w) lay.setContentsMargins(0, 0, 0, 0) self.edit = QTextEdit(w) self.edit.setReadOnly(True) self.edit.setStyleSheet(f""" QTextEdit {{ background: {BG_INPUT}; color: {FG}; border: none; font-family: "SF Mono", Menlo, Consolas, monospace; font-size: 12px; padding: 12px 14px; line-height: 1.6; }} """) lay.addWidget(self.edit) self.setWidget(w) def set_text(self, text: str): self.edit.setPlainText(text or "(空)") def toPlainText(self) -> str: """返回纯文本内容（与 QTextEdit 接口对齐，便于外部读取）。""" return self.edit.toPlainText() def text(self) -> str: return self.toPlainText() def copy_to_clipboard(self): self.edit.copy()