pyq进度条

Question

我有一个程序运行许多线程，其中一个控制接口，另一个每隔几秒钟启动一些函数。我希望计时线程更新进度条购买时，我得到：

X Error: RenderBadGlyphSet (invalid GlyphSet parameter) 165
  Extension:    150 (RENDER)
  Minor opcode: 25 (RenderCompositeGlyphs32)
  Resource id:  0x25
X Error: RenderBadGlyphSet (invalid GlyphSet parameter) 165
  Extension:    150 (RENDER)
  Minor opcode: 25 (RenderCompositeGlyphs32)
  Resource id:  0x25
X Error: RenderBadGlyphSet (invalid GlyphSet parameter) 165
  Extension:    150 (RENDER)
  Minor opcode: 25 (RenderCompositeGlyphs32)
  Resource id:  0x25
X Error: RenderBadGlyphSet (invalid GlyphSet parameter) 165
  Extension:    150 (RENDER)
  Minor opcode: 25 (RenderCompositeGlyphs32)
  Resource id:  0x25
QPixmap: It is not safe to use pixmaps outside the GUI thread
QPixmap: It is not safe to use pixmaps outside the GUI thread

这是我的代码：

#!/usr/bin/python
from PyQt4 import QtCore, QtGui
import time

class WTrainning(wMeta.WMeta, QtGui.QWidget):

    def __init__(self):
        super(WTrainning, self).__init__()

    def createUI(self):

        ...
        self.progressBar = QtGui.QProgressBar(self)
        self.progressBar.setGeometry(QtCore.QRect(30, 70, 481, 23))
        self.progressBar.setProperty("value", 24)
        self.progressBar.setObjectName("progressBar")
        QtCore.QObject.connect(self.progressBar, QtCore.SIGNAL("valueChanged(int)"), self.progressBar.setValue) 
        ...

    def modifyBarr(self, number):
        self.progressBar.setValue(number)

class Crono(QtCore.QThread):

    def __init__(self, parent):

        QtCore.QThread.__init__(self,parent)


    def checkStatus(self):

        for x in range(1,101):
            self.wtobject.modifyBarr(x)                         
            time.sleep(1)

我试过使用signals（新版本和旧版本）并创建一个用于UI更新的专用线程，但没有成功。我使用的是python 2.6.6和pyqt 4.7.4

Answer 1

必须为Crono对象定义一个信号，如下所示：

class Crono(QtCore.QThread):
    tick = QtCore.pyqtSignal(int, name="changed") #New style signal

    def __init__(self, parent):
        QtCore.QThread.__init__(self,parent)

    def checkStatus(self):
        for x in range(1,101):
            self.tick.emit(x)                     
            time.sleep(1)

然后将其连接到进度条的一个槽。

class WTrainning(wMeta.WMeta, QtGui.QWidget):

    def __init__(self):
        super(WTrainning, self).__init__()
        self.crono = Crono()

    def createUI(self):
        #Create GUI stuff here

        #Connect signal of self.crono to a slot of self.progressBar
        self.crono.tick.connect(self.progressBar.setValue)

你所做的是把progressBar的信号连接到它自己的插槽上