class QmyMainWindow(QMainWindow):
def __init__(self, parent=None):
super().__init__(parent) #调用父类构造函数，创建窗体
self.ui = Ui_MainWindow() #创建UI对象
self.ui.setupUi(self) #构造UI界面
self.player = QMediaPlayer(self) #创建视频播放器
self.player.setNotifyInterval(1000) #信息更新周期, ms
scene = QGraphicsScene(self)
self.ui.graphicsView.setScene(scene)
self.videoItem = QGraphicsVideoItem() #视频显示画面
self.videoItem.setSize(QSizeF(320, 220))
self.videoItem.setFlag(QGraphicsItem.ItemIsMovable)
self.videoItem.setFlag(QGraphicsItem.ItemIsSelectable)
self.videoItem.setFlag(QGraphicsItem.ItemIsFocusable)
scene.addItem(self.videoItem)
self.player.setVideoOutput(self.videoItem) #设置视频显示图形项
self.textItem = QGraphicsTextItem("面朝大海，春暖花开") #弹幕文字
font = self.textItem.font()
font.setPointSize(20)
self.textItem.setFont(font)
self.textItem.setDefaultTextColor(Qt.red)
self.textItem.setPos(100, 220)
self.textItem.setFlag(QGraphicsItem.ItemIsMovable)
self.textItem.setFlag(QGraphicsItem.ItemIsSelectable)
self.textItem.setFlag(QGraphicsItem.ItemIsFocusable)
scene.addItem(self.textItem)
self.ui.btnText.setCheckable(True) #弹幕文字按钮
self.ui.btnText.setChecked(True)
self.__duration = ""
self.__curPos = ""
self.player.stateChanged.connect(self.do_stateChanged)
self.player.positionChanged.connect(self.do_positionChanged)
self.player.durationChanged.connect(self.do_durationChanged)
## ==============自定义功能函数========================
## ==============event处理函数==========================
def closeEvent(self, event): #窗体关闭时
# 窗口关闭时不能自动停止播放，需手动停止
if (self.player.state() == QMediaPlayer.PlayingState):
self.player.stop()
## ==========由connectSlotsByName()自动连接的槽函数============
@pyqtSlot() ##打开文件
def on_btnOpen_clicked(self):
curPath = QDir.currentPath() #获取系统当前目录
## curPath=os.getcwd()
title = "选择视频文件"
filt = "视频文件(*.wmv *.avi);;所有文件(*.*)"
fileName, flt = QFileDialog.getOpenFileName(self, title, curPath, filt)
if (fileName == ""):
return
fileInfo = QFileInfo(fileName)
baseName = fileInfo.fileName()
## baseName=os.path.basename(fileName)
self.ui.LabCurMedia.setText(baseName)
curPath = fileInfo.absolutePath()
QDir.setCurrent(curPath) #重设当前目录
media = QMediaContent(QUrl.fromLocalFile(fileName))
self.player.setMedia(media) #设置播放文件
self.player.play()
@pyqtSlot() ##播放
def on_btnPlay_clicked(self):
self.player.play()
@pyqtSlot() ##暂停
def on_btnPause_clicked(self):
self.player.pause()
@pyqtSlot() ##停止
def on_btnStop_clicked(self):
self.player.stop()
@pyqtSlot() ##全屏
def on_btnFullScreen_clicked(self):
self.videoWidget.setFullScreen(True)
@pyqtSlot() ##静音按钮
def on_btnSound_clicked(self):
mute = self.player.isMuted()
self.player.setMuted(not mute)
if mute:
self.ui.btnSound.setIcon(QIcon(":/icons/images/volumn.bmp"))
else:
self.ui.btnSound.setIcon(QIcon(":/icons/images/mute.bmp"))
@pyqtSlot(int) ##音量调节
def on_sliderVolumn_valueChanged(self, value):
self.player.setVolume(value)
@pyqtSlot(int) ##播放进度调节
def on_sliderPosition_valueChanged(self, value):
self.player.setPosition(value)
@pyqtSlot() ##放大
def on_btnZoomIn_clicked(self):
sc = self.videoItem.scale()
self.videoItem.setScale(sc + 0.1)
@pyqtSlot() ##缩小
def on_btnZoomOut_clicked(self):
sc = self.videoItem.scale()
self.videoItem.setScale(sc - 0.1)
@pyqtSlot(bool) ##弹幕
def on_btnText_clicked(self, checked):
self.textItem.setVisible(checked)
## =============自定义槽函数===============================
def do_stateChanged(self, state):
isPlaying = (state == QMediaPlayer.PlayingState)
self.ui.btnPlay.setEnabled(not isPlaying)
self.ui.btnPause.setEnabled(isPlaying)
self.ui.btnStop.setEnabled(isPlaying)
def do_durationChanged(self, duration):
self.ui.sliderPosition.setMaximum(duration)
secs = duration / 1000 #秒
mins = secs / 60 #分钟
secs = secs % 60 #余数秒
self.__duration = "%d:%d" % (mins, secs)
self.ui.LabRatio.setText(self.__curPos + "/" + self.__duration)
def do_positionChanged(self, position):
if (self.ui.sliderPosition.isSliderDown()):
return #如果正在拖动滑条，退出
self.ui.sliderPosition.setSliderPosition(position)
secs = position / 1000 #秒
mins = secs / 60 #分钟
secs = secs % 60 #余数秒
self.__curPos = "%d:%d" % (mins, secs)
self.ui.LabRatio.setText(self.__curPos + "/" + self.__duration)
