我正在尝试使用一些图形小部件为我的孩子构建一个简单的1x1练习工具。如下图所示,“新问题”按钮在内部生成2个随机数,并将其显示在文本字段中。用户必须在=旁边提供结果。使用“检查结果”,我想要一个条件指令:
现在,问题是:我在连接到“新问题”按钮的函数中生成随机数。如果我点击“检查结果”,那么这些数字将不会传递给“检查结果”按钮。没有类定义我通常通过返回传递值,但是,这里使用类self它不起作用。
非常感谢任何帮助!
到目前为止我得到的代码是:
from PyQt4 import QtGui
import sys
import random
import numpy as np
import new_design6 # translated from Qt designer (not relevant for this question)
class ExampleApp(QtGui.QMainWindow,new_design6.Ui_MainWindow):
def __init__(self):
super(self.__class__, self).__init__()
self.setupUi(self)
self.exit_app.clicked.connect(self.exit_application)
self.get_new_problem.clicked.connect(self.generate_new_problem)
self.check_result.clicked.connect(self.check_problem_result)
def generate_new_problem(self):
# clear each field
self.show_problem.clear()
self.input_result.clear()
self.show_result.clear()
u = int(np.random.randint(0,11,1))
v = int(np.random.randint(0,11,1))
w = str(u) + " x " + str(v)
self.show_problem.setReadOnly(True)
self.show_problem.setPlainText(w)
# how to pass my random numbers ?
return(u,v) #*---> Problem line1*
def check_problem_result(self,u,v): #*---> Problem line1*
input_result_number=self.input_result.toPlainText()
result=int(input_result_number)
# here I'd like to have a conditional question to check if result is correkt or wrong
if (result == u*v):
result_string="Correct! Result is: " + str(result)
self.show_result.setPlainText(result_string)
else:
result_string="Wrong! Result is: " + str(result) + "Try another one"
def exit_application(self):
self.close()
def main():
app = QtGui.QApplication(sys.argv)
form = ExampleApp()
form.show()
app.exec_()
if __name__=='__main__':
main()
答案 0 :(得分:1)
合适的方法是创建一个管理操作的类:
class Operation:
def __init__(self):
self.params = []
def setParams(self, params):
self.params = params
def process(self):
# processing
u, v = self.params
result = u*v
return result
def toString(self):
return "{}x{}".format(*self.params)
然后将这种对象创建为窗口小部件的属性并处理逻辑,因为它是可以在类的整个范围内访问的属性。
要更改颜色,我使用小部件的QPalette,如下面的代码所示:
class ExampleApp(QtGui.QMainWindow,new_design6.Ui_MainWindow):
def __init__(self):
super(self.__class__, self).__init__()
self.setupUi(self)
self.exit_app.clicked.connect(self.close)
self.get_new_problem.clicked.connect(self.generate_new_problem)
self.check_result.clicked.connect(self.check_problem_result)
self.operation = Operation()
self.show_problem.setReadOnly(True)
def generate_new_problem(self):
self.show_problem.clear()
self.input_result.clear()
self.show_result.clear()
pal = self.show_result.palette()
pal.setColor(QtGui.QPalette.Base, QtCore.Qt.white)
self.show_result.setPalette(pal)
u = int(np.random.randint(0,11,1))
v = int(np.random.randint(0,11,1))
params = u, v
self.operation.setParams(params)
self.show_problem.setPlainText(self.operation.toString())
def check_problem_result(self):
input_result_number = self.input_result.toPlainText()
result = int(input_result_number)
pal = self.show_result.palette()
if self.operation.process() == result:
result_string="Correct! Result is: {}".format(result)
pal.setColor(QtGui.QPalette.Base, QtCore.Qt.green)
else:
result_string="Wrong! Result is: {} Try another one".format(result)
pal.setColor(QtGui.QPalette.Base, QtCore.Qt.red)
self.show_result.setPlainText(result_string)
self.show_result.setPalette(pal)