[英]Delete Label and Button on Button Click PyQt5
I'm writing a program that has a list showing current tasks.我正在编写一个程序,其中包含一个显示当前任务的列表。 Simplified version look something like this:
简化版看起来像这样:
Then I click the add button it has to append the task to the other one, and then I click X it has to delete the task.然后我单击添加按钮,它必须将 append 任务分配给另一个任务,然后我单击 X 它必须删除任务。 I'm not that advanced in programming and can't figure out how to do it right.
我在编程方面不是那么先进,也不知道如何正确地做。 The code look like this:
代码如下所示:
import sys
from PyQt5.QtWidgets import (
QApplication,
QGridLayout,
QLineEdit,
QPushButton,
QVBoxLayout,
QWidget,
QLabel)
class App(QWidget):
def __init__(self, parent=None):
super().__init__(parent)
self.taskList = ['Some text 1', 'Some text 2', 'some text 3']
self.initUI()
def initUI(self):
self.title = 'Task list'
self.main_layout = QVBoxLayout()
self.grid = QGridLayout()
self.input_field = QLineEdit()
self.add = QPushButton('add')
self.add.clicked.connect(self.addTask)
self.grid.addWidget(self.input_field, 0, 0)
self.grid.addWidget(self.add, 0, 1)
self.showTasks()
self.main_layout.addLayout(self.grid)
self.main_layout.addStretch()
self.setLayout(self.main_layout)
self.setWindowTitle(self.title)
self.resize(300, 100)
self.show()
def showTasks(self):
row = 2
col = 0
for task in self.taskList:
task_label = QLabel(task)
task_button = QPushButton('X')
task_button.clicked.connect(
lambda: self.removeTask(task_label.text()))
self.grid.addWidget(task_label, row, col, 1, 1)
self.grid.addWidget(task_button, row, col+1, 1, 1)
row += 1
def addTask(self):
task = self.input_field.text()
if task:
self.taskList.append(task)
self.update()
def removeTask(self, task):
self.taskList.remove(task)
self.update()
if __name__ == '__main__':
app = QApplication(sys.argv)
ex = App()
sys.exit(app.exec_())
A possible solution is to map the buttons and labels in a dictionary, getting the button through the sender method and then deleting them using deleteLater.一种可能的解决方案是将map字典中的按钮和标签,通过sender方法获取按钮,然后使用deleteLater删除它们。
class App(QWidget):
def __init__(self, parent=None):
super().__init__(parent)
self.taskList = ["Some text 1", "Some text 2", "some text 3"]
self.initUI()
def initUI(self):
self.title = "Task list"
self.main_layout = QVBoxLayout()
self.grid = QGridLayout()
self.input_field = QLineEdit()
self.add = QPushButton("add")
self.add.clicked.connect(self.handle_add_clicked)
self.grid.addWidget(self.input_field, 0, 0)
self.grid.addWidget(self.add, 0, 1)
self.mapping_widget = {}
self.showTasks()
self.main_layout.addLayout(self.grid)
self.main_layout.addStretch()
self.setLayout(self.main_layout)
self.setWindowTitle(self.title)
self.resize(300, 100)
self.show()
def add_task(self, task):
row = self.grid.rowCount()
task_label = QLabel(task)
task_button = QPushButton("X")
task_button.clicked.connect(self.handle_delete_clicked)
self.grid.addWidget(task_label, row, 0)
self.grid.addWidget(task_button, row, 1)
self.mapping_widget[task_button] = task_label
def showTasks(self):
for task in self.taskList:
self.add_task(task)
def handle_add_clicked(self):
task = self.input_field.text()
self.add_task(task)
def handle_delete_clicked(self):
button = self.sender()
if not isinstance(button, QPushButton):
return
label = self.mapping_widget.get(button)
if label is None:
return
del self.mapping_widget[button]
button.deleteLater()
label.deleteLater()
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