PyQt5可勾选组合框:显示勾选项目列表
PyQt5 checkable combo box: display list of checked items
基于可检查的组合框实现,我想更进一步,能够直接在主QComboBox标签上显示已检查项目的列表,即当QComboBox显示的文字不是"unfolded".
到目前为止,我能够打印选中项目的列表,但我不知道如何用前者更改主要 QComboBox 标签文本:
from PyQt5.QtWidgets import QApplication, QComboBox, QMainWindow, QWidget, QVBoxLayout
from PyQt5.QtGui import QStandardItemModel
from PyQt5.QtCore import Qt
import sys
class CheckableComboBox(QComboBox):
def __init__(self):
super(CheckableComboBox, self).__init__()
self.view().pressed.connect(self.handle_item_pressed)
self.setModel(QStandardItemModel(self))
def handle_item_pressed(self, index):
item = self.model().itemFromIndex(index)
if item.checkState() == Qt.Checked:
item.setCheckState(Qt.Unchecked)
# print(item.text() + " was unselected.")
else:
item.setCheckState(Qt.Checked)
# print(item.text() + " was selected.")
self.check_items()
def item_checked(self, index):
item = self.model().item(index, 0)
return item.checkState() == Qt.Checked
def check_items(self):
checkedItems = []
for i in range(self.count()):
if self.item_checked(i):
checkedItems.append(self.model().item(i, 0).text())
print(checkedItems)
class Dialog_01(QMainWindow):
def __init__(self):
super(QMainWindow, self).__init__()
myQWidget = QWidget()
myBoxLayout = QVBoxLayout()
myQWidget.setLayout(myBoxLayout)
self.setCentralWidget(myQWidget)
self.ComboBox = CheckableComboBox()
for i in range(3):
self.ComboBox.addItem("Combobox Item " + str(i))
item = self.ComboBox.model().item(i, 0)
item.setCheckState(Qt.Unchecked)
myBoxLayout.addWidget(self.ComboBox)
if __name__ == '__main__':
app = QApplication(sys.argv)
dialog_1 = Dialog_01()
dialog_1.show()
dialog_1.resize(480, 320)
sys.exit(app.exec_())
一张图说明我想要什么:
您可以覆盖 paintEvent 方法:
class CheckableComboBox(QComboBox):
def __init__(self):
super(CheckableComboBox, self).__init__()
self.view().pressed.connect(self.handle_item_pressed)
self.setModel(QStandardItemModel(self))
def handle_item_pressed(self, index):
item = self.model().itemFromIndex(index)
if item.checkState() == Qt.Checked:
item.setCheckState(Qt.Unchecked)
else:
item.setCheckState(Qt.Checked)
def item_checked(self, index):
item = self.model().item(index, 0)
return item.checkState() == Qt.Checked
def check_items(self):
checkedItems = []
for i in range(self.count()):
if self.item_checked(i):
checkedItems.append(self.model().item(i, 0).text())
return checkedItems
def paintEvent(self, event):
painter = QStylePainter(self)
painter.setPen(self.palette().color(QPalette.Text))
opt = QStyleOptionComboBox()
self.initStyleOption(opt)
opt.currentText = ",".join(self.check_items())
painter.drawComplexControl(QStyle.CC_ComboBox, opt)
painter.drawControl(QStyle.CE_ComboBoxLabel, opt)
只需对原始代码稍作改动,您就可以轻松实现以下代码。当您打开组合框选项卡时,您会看到所有项目标签都更新为当前选定的选项。
示例:
- 如果选择了所有选项,您将得到:
"Combobox Item 0 - selected item(s): 0, 1, 2"
或
- 如果例如选项 0 被删除:
Combobox Item 2 - selected item(s): 1, 2
代码:
def check_items(self):
checkedItems = []
for i in range(self.count()):
if self.item_checked(i):
checkedItems.append(i)
self.update_labels(checkedItems)
def update_labels(self, item_list):
n = ''
count = 0
for i in item_list:
if count == 0:
n += ' %s' % i
else:
n += ', %s' % i
count += 1
# print('n : "%s".' % n)
for i in range(self.count()):
text_label = self.model().item(i, 0).text()
# print('Current (index %s) text_label "%s"' % (i, text_label))
# sys.stdout.flush()
if text_label.find('-') >= 0:
text_label = text_label.split('-')[0]
item_new_text_label = text_label + ' - selected item(s): ' + n
# self.model().item(i).setText(item_new_text_label)
self.setItemText(i, item_new_text_label) # copy/paste error corrected.
# print(item_list)
sys.stdout.flush()
基于可检查的组合框实现,我想更进一步,能够直接在主QComboBox标签上显示已检查项目的列表,即当QComboBox显示的文字不是"unfolded".
到目前为止,我能够打印选中项目的列表,但我不知道如何用前者更改主要 QComboBox 标签文本:
from PyQt5.QtWidgets import QApplication, QComboBox, QMainWindow, QWidget, QVBoxLayout
from PyQt5.QtGui import QStandardItemModel
from PyQt5.QtCore import Qt
import sys
class CheckableComboBox(QComboBox):
def __init__(self):
super(CheckableComboBox, self).__init__()
self.view().pressed.connect(self.handle_item_pressed)
self.setModel(QStandardItemModel(self))
def handle_item_pressed(self, index):
item = self.model().itemFromIndex(index)
if item.checkState() == Qt.Checked:
item.setCheckState(Qt.Unchecked)
# print(item.text() + " was unselected.")
else:
item.setCheckState(Qt.Checked)
# print(item.text() + " was selected.")
self.check_items()
def item_checked(self, index):
item = self.model().item(index, 0)
return item.checkState() == Qt.Checked
def check_items(self):
checkedItems = []
for i in range(self.count()):
if self.item_checked(i):
checkedItems.append(self.model().item(i, 0).text())
print(checkedItems)
class Dialog_01(QMainWindow):
def __init__(self):
super(QMainWindow, self).__init__()
myQWidget = QWidget()
myBoxLayout = QVBoxLayout()
myQWidget.setLayout(myBoxLayout)
self.setCentralWidget(myQWidget)
self.ComboBox = CheckableComboBox()
for i in range(3):
self.ComboBox.addItem("Combobox Item " + str(i))
item = self.ComboBox.model().item(i, 0)
item.setCheckState(Qt.Unchecked)
myBoxLayout.addWidget(self.ComboBox)
if __name__ == '__main__':
app = QApplication(sys.argv)
dialog_1 = Dialog_01()
dialog_1.show()
dialog_1.resize(480, 320)
sys.exit(app.exec_())
一张图说明我想要什么:
您可以覆盖 paintEvent 方法:
class CheckableComboBox(QComboBox):
def __init__(self):
super(CheckableComboBox, self).__init__()
self.view().pressed.connect(self.handle_item_pressed)
self.setModel(QStandardItemModel(self))
def handle_item_pressed(self, index):
item = self.model().itemFromIndex(index)
if item.checkState() == Qt.Checked:
item.setCheckState(Qt.Unchecked)
else:
item.setCheckState(Qt.Checked)
def item_checked(self, index):
item = self.model().item(index, 0)
return item.checkState() == Qt.Checked
def check_items(self):
checkedItems = []
for i in range(self.count()):
if self.item_checked(i):
checkedItems.append(self.model().item(i, 0).text())
return checkedItems
def paintEvent(self, event):
painter = QStylePainter(self)
painter.setPen(self.palette().color(QPalette.Text))
opt = QStyleOptionComboBox()
self.initStyleOption(opt)
opt.currentText = ",".join(self.check_items())
painter.drawComplexControl(QStyle.CC_ComboBox, opt)
painter.drawControl(QStyle.CE_ComboBoxLabel, opt)
只需对原始代码稍作改动,您就可以轻松实现以下代码。当您打开组合框选项卡时,您会看到所有项目标签都更新为当前选定的选项。
示例:
- 如果选择了所有选项,您将得到:
"Combobox Item 0 - selected item(s): 0, 1, 2"
或
- 如果例如选项 0 被删除:
Combobox Item 2 - selected item(s): 1, 2
代码:
def check_items(self):
checkedItems = []
for i in range(self.count()):
if self.item_checked(i):
checkedItems.append(i)
self.update_labels(checkedItems)
def update_labels(self, item_list):
n = ''
count = 0
for i in item_list:
if count == 0:
n += ' %s' % i
else:
n += ', %s' % i
count += 1
# print('n : "%s".' % n)
for i in range(self.count()):
text_label = self.model().item(i, 0).text()
# print('Current (index %s) text_label "%s"' % (i, text_label))
# sys.stdout.flush()
if text_label.find('-') >= 0:
text_label = text_label.split('-')[0]
item_new_text_label = text_label + ' - selected item(s): ' + n
# self.model().item(i).setText(item_new_text_label)
self.setItemText(i, item_new_text_label) # copy/paste error corrected.
# print(item_list)
sys.stdout.flush()