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24-QWidget-焦点控制.py
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24-QWidget-焦点控制.py
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import sys
from PyQt5.Qt import *
class Window(QWidget):
def mousePressEvent(self, evt) -> None:
# print(self.focusWidget())
# self.focusNextChild() # 焦点切换到下一个子控件
# self.focusPreviousChild() # 焦点切换到上一个子控件
pass
# 1. 创建一个应用程序对象
app = QApplication(sys.argv)
# 2.控件的操作
# 2.1创建控件
window = Window()
# 2.2设置控件
window.setWindowTitle("焦点控制")
window.resize(500, 500)
window.move(400, 250)
le1 = QLineEdit(window)
le1.move(50, 50)
le2 = QLineEdit(window)
le2.move(50, 100)
le3 = QLineEdit(window)
le3.move(50, 150)
# 是个静态方法,设置了子控件获取焦点的先后顺序
QWidget.setTabOrder(le1, le3)
QWidget.setTabOrder(le3, le2)
# le2.setFocus() # 设置获得焦点
# le2.clearFocus() # 清空获得的焦点
# le2.setFocusPolicy(Qt.TabFocus) # 设置获取焦点策略为仅通过Tab键获取
# le2.setFocusPolicy(Qt.ClickFocus) # 设置获取焦点策略为仅通过鼠标点击获取
le2.setFocusPolicy(Qt.StrongFocus) # 设置获取焦点策略为鼠标点击、Tab两种方式,也是默认值
# le2.setFocusPolicy(Qt.NoFocus) # 设置不能通过两种方式获得焦点
# 2.3展示控件
window.show()
# 获取当前窗口内部,所有子控件当中获取焦点的那个控件
print(window.focusWidget())
# 3.应用程序的执行, 进入到消息循环
sys.exit(app.exec_())