pyqt进度条

Question

我有一个程序运行多个线程，其中一个控制界面，另一个启动一些功能，每隔几秒钟。我想时机线程更新进度条买的时候我做的，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 

这里是我的代码：

#!/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) 

我会试着用信号（新旧版本）和为UI更新创建专用线程，但没有任何工作。我使用python 2.6.6和4.7.4的PyQt

Answer 1

你必须定义为CRONO对象这样一个信号：

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插槽。

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) 

什么你做的是进度的信号valueChanged连接到自己的SLOT setValue