from PyQt4.QtGui import *
from PyQt4.QtCore import *


class progressSlider(QSlider):
    def __init__(self, orientation, parent=None):
        super(progressSlider, self).__init__(orientation, parent)

    def mousePressEvent(self, event):
        if self.topLevelWidget().mediaObj.state() != 2
 
:
            return
        new = QStyle.sliderValueFromPosition(self.minimum(), self.maximum(), event.x(), self.width())
        self.setValue(new)
        self.emit(SIGNAL('sliderMoved(int)'), new)

    def mouseMoveEvent(self, event):
        if self.topLevelWidget().mediaObj.state() != 2:
            return
 

        new = QStyle.sliderValueFromPosition(self.minimum(), self.maximum(), event.x(), self.width())
        self.setValue(new)
        self.emit(SIGNAL('sliderMoved(int)'), new)

    def wheelEvent(self, event):
        max = self.maximum()
        min = self.minimum()
        if event.delta() >= 120
 
:    
            #滾動3%   
            new = self.value()+ max*0.03
            if new > max:
                new = max
            self.setValue(new)
            self.emit(SIGNAL('sliderMoved(int)'), new)
        elif event.delta() <= -120:         
            new = self.value()- max*0.03
            if new < min:
                new = min
            self.setValue(new)
            self.emit(SIGNAL('sliderMoved(int)'), new)