请用QDoubleValidator实现,QLineEdit限制输入1到10000之间的浮点数
时间: 2023-06-07 11:10:02 浏览: 157
好的,您可以使用如下代码来实现:
```python
from PyQt5.QtWidgets import *
from PyQt5.QtGui import *
class FloatValidator(QDoubleValidator):
def __init__(self, bottom, top, decimals, parent=None):
super().__init__(bottom, top, decimals, parent)
def validate(self, string, pos):
if string == "" or string == "-":
return QValidator.Intermediate, string, pos
state, val, pos = super().validate(string, pos)
if val and float(val) < self.bottom():
return QValidator.Invalid, string, pos
if val and float(val) > self.top():
return QValidator.Invalid, string, pos
return state, val, pos
class MyLineEdit(QLineEdit):
def __init__(self):
super().__init__()
self.validator = FloatValidator(1, 10000, 2, self)
self.setValidator(self.validator)
if __name__ == '__main__':
import sys
app = QApplication(sys.argv)
w = QWidget()
le = MyLineEdit()
layout = QVBoxLayout()
layout.addWidget(le)
w.setLayout(layout)
w.show()
sys.exit(app.exec_())
```
使用`FloatValidator`类来控制`QLineEdit`的输入,用户只能输入1到10000之间的浮点数。如果输入的数值小于1或大于10000,则会弹出一个错误信息,显示无法输入。
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