class MainWindow(QMainWindow):
def __init__(self):
super().__init__()
self.setWindowTitle("My App")
self.widget = QCheckBox("This is a checkboxA")
self.widget.setCheckState(Qt.Checked)
self.widget.setTristate(True)
self.widget.stateChanged.connect(self.show_state)
self.setCentralWidget(self.widget)
def show_state(self, s):
print(s == Qt.Checked, s)
print(self.widget.isTristate())
class ParentTreeItemWidget(QFrame):
def __init__(self, text, item):
QWidget.__init__(self)
self.setMouseTracking(True)
self.text = text
self.item = item
self.label = QLabel()
self.checkBox = QCheckBox("")
self.checkBox.setTristate(True)
self.checkBox.stateChanged.connect(self.check_box_state_changed)
layout = QHBoxLayout()
layout.setMargin(0)
layout.addWidget(self.checkBox)
layout.addWidget(self.label)
layout.addStretch()
self.setLayout(layout)
def check_box_state_changed(self):
total = self.item.childCount()
if self.checkBox.isTristate():
self.checkBox.setTristate(False)
self.checkBox.setChecked(False)
else:
for i in range(total):
w = self.item.treeWidget().itemWidget(self.item.child(i), 0)
w.setChecked(self.checkBox.isChecked(), False)
self.item.treeWidget().quadsSelectionChanged.emit()
def update_name_and_checkbox(self):
selected = 0
total = self.item.childCount()
for i in range(total):
w = self.item.treeWidget().itemWidget(self.item.child(i), 0)
if w.isSelected():
selected += 1
self.label.setText(
f"<b>{self.text} - {selected} of {total} selected</b>")
self.checkBox.blockSignals(True)
if selected == total:
self.checkBox.setTristate(False)
self.checkBox.setCheckState(Qt.Checked)
elif selected == 0:
self.checkBox.setTristate(False)
self.checkBox.setCheckState(Qt.Unchecked)
else:
self.checkBox.setTristate(True)
self.checkBox.setCheckState(Qt.PartiallyChecked)
self.checkBox.blockSignals(False)
class MyWindow(QWidget):
def __init__(self):
super(MyWindow, self).__init__()
self.initGUI("PyQt5 学习 QCheckBox")
layout = QGridLayout()
self.setLayout(layout)
self.checkbox1 = QCheckBox("Kestrel")
self.checkbox1.setToolTip("什么意思")
# FIXME: 为什么不能显示 WhatsThis?
self.checkbox1.setWhatsThis("帮助文档也解决不了这个问题")
self.checkbox1.setChecked(True)
self.checkbox1.toggled.connect(self.checkbox_toggled)
layout.addWidget(self.checkbox1, 0, 0)
self.checkbox2 = QCheckBox("Sparrowhawk")
self.checkbox2.setWhatsThis("帮助文档：看起来像是什么老鹰")
self.checkbox2.toggled.connect(self.checkbox_toggled)
layout.addWidget(self.checkbox2, 1, 0)
self.checkbox3 = QCheckBox("Hobby")
self.checkbox3.setToolTip("兴趣爱好")
self.checkbox3.toggled.connect(self.checkbox_toggled)
layout.addWidget(self.checkbox3, 2, 0)
layout2 = QBoxLayout(QBoxLayout.TopToBottom)
layout.addLayout(layout2, 0, 1)
layout.setHorizontalSpacing(5)
self.checkbox4 = QCheckBox("Sex")
self.checkbox4.setToolTip("三态复选框")
self.checkbox4.setTristate(True)
self.checkbox4.setCheckState(True)
self.checkbox4.toggled.connect(self.checkbox_toggled)
self.checkbox4.clicked.connect(self.on_clicked)
layout2.addWidget(self.checkbox4)
self.checkbox5 = QCheckBox("Age")
self.checkbox5.setToolTip("两态复选框")
self.checkbox5.setTristate(False)
self.checkbox5.setChecked(True)
self.checkbox5.toggled.connect(self.checkbox_toggled)
layout2.addWidget(self.checkbox5)
self.btn = QPushButton("Click Me")
self.btn.setWhatsThis("点击我呀笨蛋")
layout2.addSpacing(10)
layout2.addWidget(self.btn)
def on_clicked(self):
"""
三态复选框最好使用 clicked() 信号，因为它能检查到 Qt.Checked 值，
而 checkbox_toggled() 信号用 Qt.PartiallyChecked 覆盖了 Qt.Checked 事件
"""
if self.checkbox4.checkState() == Qt.PartiallyChecked:
print("按钮4 -- 三态复选框 -- 部分选中了")
elif self.checkbox4.checkState() == Qt.Unchecked:
print("按钮4 -- 三态复选框 -- 取消选中")
elif self.checkbox4.checkState() == Qt.Checked:
print("按钮4 -- 三态复选框 -- 选中了")
def checkbox_toggled(self):
selected = []
print("\n")
if self.checkbox1.isChecked():
selected.append(self.checkbox1.text())
if self.checkbox2.isChecked():
selected.append(self.checkbox2.text())
if self.checkbox3.isChecked():
selected.append(self.checkbox3.text())
if self.checkbox4.isTristate():
if self.checkbox4.checkState() == Qt.PartiallyChecked:
print("按钮4 -- 三态复选框 -- 部分选中了")
elif self.checkbox4.checkState() == Qt.Unchecked:
print("按钮4 -- 三态复选框 -- 取消选中")
elif self.checkbox4.checkState() == Qt.Checked:
print("按钮4 -- 三态复选框 -- 选中了")
if self.checkbox5.isTristate():
print("按钮5 -- 三态")
else:
if self.checkbox5.isChecked():
print("按钮5 -- 非三态 -- 选中")
else:
print("按钮5 -- 非三态 -- 未选中")
print("Selected: %s" % (" ".join(selected)))
def initGUI(self, title):
"""
设置窗口大小和位置，以及标题
"""
startx = 800
starty = 400
width = 480
height = 320
self.setGeometry(startx, starty, width, height)
self.setWindowTitle(title)
