运行多个qthreads
问题描述:
在所附的代码,当你点击开始它创建一个QSpinBox
,并开始在QThread
数到20,但如果我再次点击开始同时计数,第一QSpinBox
停止,并新的需要关注的焦点,而这两个计数器在运行它,但我需要的所有旋转以分别同时运行:运行多个qthreads
import sys
import time
from PySide.QtGui import *
from PySide.QtCore import *
class frmMain(QDialog):
def __init__(self):
QDialog.__init__(self)
self.btStart = QPushButton('Start')
self.btStop = QPushButton('Stop')
self.counter = QSpinBox()
self.layout = QVBoxLayout()
self.layout.addWidget(self.btStart)
self.layout.addWidget(self.btStop)
self.layout.addWidget(self.counter)
self.setLayout(self.layout)
self.btStart.clicked.connect(self.start_thread)
self.btStop.clicked.connect(self.stop_thread)
self.boxes = []
def stop_thread(self):
self.th.stop()
def loopfunction(self, x):
self.boxes[-1].setValue(x)
def start_thread(self):
self.th = thread(2)
self.th.loop.connect(self.loopfunction)
self.th.setTerminationEnabled(True)
self.boxes.append(QSpinBox())
self.layout.addWidget(self.boxes[-1])
self.th.start()
class thread(QThread):
loop = Signal(object)
def __init__(self, x):
QThread.__init__(self)
self.x = x
def run(self):
for i in range(20):
self.x = i
self.loop.emit(self.x)
time.sleep(0.5)
def stop(self):
self.stop()
app = QApplication(sys.argv)
win = frmMain()
win.show()
sys.exit(app.exec_())
答
我做了一些重要变化:
- 保留了一个单独的线程列表,因为您正在覆盖同一个线程对象,
- 修复了停止线程时的递归错误;使用
terminate
代替 - 线程跟踪其自己的索引,以便知道要更新哪个旋转框。
这不是真的清楚你想,当你按下停止,或者按开始停药后发生的事情,但是这个代码应该更多的还是你少工作:
import sys
import time
from PySide.QtGui import *
from PySide.QtCore import *
class frmMain(QDialog):
def __init__(self):
QDialog.__init__(self)
self.btStart = QPushButton('Start')
self.btStop = QPushButton('Stop')
#self.counter = QSpinBox()
self.layout = QVBoxLayout()
self.layout.addWidget(self.btStart)
self.layout.addWidget(self.btStop)
#self.layout.addWidget(self.counter)
self.setLayout(self.layout)
self.btStart.clicked.connect(self.start_thread)
self.btStop.clicked.connect(self.stop_thread)
self.boxes = []
self.threads = []
def stop_thread(self):
for th in self.threads:
th.terminate()
def loopfunction(self, n, index):
self.boxes[index].setValue(n)
def start_thread(self):
index = len(self.threads)
th = thread(index)
th.loop.connect(self.loopfunction)
th.setTerminationEnabled(True)
th.start()
self.threads.append(th)
self.boxes.append(QSpinBox())
self.layout.addWidget(self.boxes[index])
class thread(QThread):
loop = Signal(int, int)
def __init__(self, index):
QThread.__init__(self)
self.index = index
def run(self):
for n in range(20):
self.loop.emit(n, self.index)
time.sleep(0.5)
app = QApplication(sys.argv)
win = frmMain()
win.show()
sys.exit(app.exec_())
+0
谢谢,它工作:) –
所以,你希望这是一个每次启动都会点击一个新的旋转框,每个人都保持它自己的时间?或者您是否只希望一个旋转盒在重新按下开始按钮时重置? – 101
每次点击新的旋转框 –
应该停止按钮停止所有定时器吗? – 101