[英]How to select item from Qlistwidget , and update textbox in Pyqt5?
Select 通過鍵盤(按鍵事件)從 QListWidget 項目,完美運行。
但同時,我也想通過鼠標單擊從 QListWidget 中獲取 select 項目。
嘗試使用“itemclicked.connect”,但它不像我預期的那樣工作。
我的代碼在這里:
文件 1(文件名:example_main_001.py):
import sys
from PyQt5.QtWidgets import *
from PyQt5.QtCore import *
from PyQt5.QtGui import *
from example_source_file_001 import Sourcefile
textbox_items = {
"textbox1": ["Python", "Python 2.7", "Python 2.9", "Python 3.5", "Python 3.7", "National", "Zebra",
"Apple", "X Ray", "Boat", "Tiger", "Item001", "Item002", "Item003", "Item004", "Item005",
"001Item", "002Item", "003Item", "004Item", "005Item", "Ball", "Cat", "Dog", "Fish",
"Gold Fish", "Star Fish", "2821", "2822", "2823", "2811", "2812", "2813"],
"textbox2": ["India","America","Russia","China","England","Iran","Iraq","Ice Land"],
"textbox3": ["Red", "Dark red", "Light Red", "Redish Blue", "Redish Green", "Green","Blue","Dark
Blue", "Dark Green"]
}
class Mclick_sample_main(QWidget):
def __init__(self):
super().__init__()
self.setWindowTitle("Mouse click Samples")
self.textbox1 = QLineEdit()
self.textbox2 = QLineEdit()
self.textbox3 = QLineEdit()
self.lbox1 = QListWidget()
self.lbox2 = QListWidget()
self.textbox1.setObjectName("textbox1")
self.textbox2.setObjectName("textbox2")
self.textbox3.setObjectName("textbox3")
self.lbox1.setObjectName("listbox1")
self.lbox2.setObjectName("listbox2")
vbox = QVBoxLayout(self)
vbox.addWidget(self.textbox1)
vbox.addWidget(self.textbox2)
vbox.addWidget(self.textbox3)
vbox.addWidget(self.lbox2)
self.current_textbox = None
QApplication.instance().focusChanged.connect(self.on_focusChanged)
self.textbox1.returnPressed.connect(lambda: self.textbox2.setFocus(Qt.ShortcutFocusReason))
self.textbox2.returnPressed.connect(lambda: self.textbox3.setFocus(Qt.ShortcutFocusReason))
self.textbox3.returnPressed.connect(lambda: self.textbox1.setFocus(Qt.ShortcutFocusReason))
def on_focusChanged(self, old, new):
fwidget = QApplication.focusWidget()
if fwidget is not None:
if isinstance(new, QLineEdit) and new != self.current_textbox:
self.current_textbox = new
self.lbox1.clear()
self.lbox1.addItems(textbox_items[new.objectName()])
self.lbox2.clear()
self.lbox2.addItems(textbox_items[new.objectName()])
self.getdetails_1 = Sourcefile(self.current_textbox, self.lbox1, self.lbox2)
self.current_textbox.textChanged.connect(self.getdetails_1.func_textbox_textchanged)
def main():
myapp = QApplication(sys.argv)
mywin = Mclick_sample_main()
mywin.show()
sys.exit(myapp.exec_())
if __name__ == "__main__":
main()
文件 2(文件名:example_source_file_001.py)
from PyQt5.QtWidgets import *
from PyQt5.QtGui import *
from PyQt5.QtCore import *
flag = 1
search_text_length = 0
startitem_rowno = None
enditem_rowno = None
selected_item = None
selec_item = None
class Sourcefile(QWidget):
def __init__(self, textbox, listbox1,listbox2,parent=None):
super().__init__(listbox2)
global startitem_rowno,enditem_rowno
self.setFocusPolicy(Qt.StrongFocus)
self.tbox1 = textbox
self.lbox1 = listbox1
self.lbox2 = listbox2
self.tbox1.installEventFilter(self)
self.lbox2.installEventFilter(self)
startitem_rowno = 0
enditem_rowno = len(self.lbox2) - 1
def eventFilter(self, source, event):
global cursor_position, textbox_value,selected_item
if event.type() == QEvent.KeyPress and source is self.tbox1:
if event.modifiers() == Qt.AltModifier and event.key() == Qt.Key_S:
self.func_item_startswith()
return True
if event.key() == Qt.Key_Down:
self.lbox2.setFocus()
self.lbox2.setCurrentRow(startitem_rowno)
cursor_position = self.tbox1.cursorPosition()
textbox_value = self.tbox1.text()
if event.key() == Qt.Key_Up:
self.lbox2.setFocus()
self.lbox2.setCurrentRow(enditem_rowno)
cursor_position = self.tbox1.cursorPosition()
textbox_value = self.tbox1.text()
if event.key() == Qt.Key_Return:
pass
if event.type() == QEvent.KeyPress and source is self.lbox2:
if event.key() == Qt.Key_Left or event.key() == Qt.Key_Backspace:
self.tbox1.setFocus()
return True
elif event.key() == Qt.Key_Return :
self.selected_item = self.lbox2.currentItem().text()
if self.selected_item is not None:
self.tbox1.setText(self.selected_item)
self.tbox1.setFocus()
return True
elif event.key() == Qt.Key_Up or event.key() == Qt.Key_Down:
pass
return super(Sourcefile, self).eventFilter(source, event)
def func_item_startswith(self):
global flag, startitem_rowno, enditem_rowno
flag = 1
startitem_rowno = 0
enditem_rowno = startitem_count - 1
# self.lbox2.clear()
if startitem_count > 0:
for item in item_startswith:
self.lbox2.addItem(item.text())
else:
print("No Matching from start item")
def func_item_normal(self):
global falg,startitem_rowno,enditem_rowno
flag = 0
startitem_rowno = 0
enditem_rowno = normal_count - 1
self.lbox2.clear()
if normal_count > 0:
for item in item_normal:
self.lbox2.addItem(item.text())
def func_textbox_textchanged(self, txt):
global search_text, search_text_length, total_listbox_item, availableitem_count, normal_count, startitem_count, \
containitem_count, enditem_count, item_normal, item_startswith, item_contains, item_endswith, flag, \
startitem_rowno, enditem_rowno
search_text = self.tbox1.text()
search_text_length = len(search_text)
total_listbox_item = len(self.lbox2)
item_normal = self.lbox1.findItems("*", Qt.MatchWildcard)
item_startswith = self.lbox1.findItems(search_text, Qt.MatchStartsWith)
normal_count = len(item_normal)
startitem_count = len(item_startswith)
self.func_item_normal()
if search_text_length >= 1: pass
else: flag = 1
self.lbox2.clear()
if flag == 1:
self.func_item_startswith()
else:
self.func_item_normal()
抱歉,我不太了解您的示例,但我嘗試添加itemClicked.connect
。 我標記了我進行更改的行。 試試看:
example_main_001.py
import sys
from PyQt5.QtWidgets import *
from PyQt5.QtCore import *
from PyQt5.QtGui import *
from example_source_file_001 import Sourcefile
textbox_items = {
"textbox1": ["Python", "Python 2.7", "Python 2.9", "Python 3.5", "Python 3.7", "National", "Zebra",
"Apple", "X Ray", "Boat", "Tiger", "Item001", "Item002", "Item003", "Item004", "Item005",
"001Item", "002Item", "003Item", "004Item", "005Item", "Ball", "Cat", "Dog", "Fish",
"Gold Fish", "Star Fish", "2821", "2822", "2823", "2811", "2812", "2813"],
"textbox2": ["India","America","Russia","China","England","Iran","Iraq","Ice Land"],
"textbox3": ["Red", "Dark red", "Light Red", "Redish Blue", "Redish Green", "Green","Blue",
"Dark Blue", "Dark Green"]
}
class ListWidget(QListWidget): # +++
def __init__(self, parent=None): # +++
super(ListWidget, self).__init__(parent) # +++
def _clicked(self, item): # +++
self.window().old.setText(item.text()) # +++
class Mclick_sample_main(QWidget):
def __init__(self):
super().__init__()
self.setWindowTitle("Mouse click Samples")
self.textbox1 = QLineEdit()
self.textbox2 = QLineEdit()
self.textbox3 = QLineEdit()
self.lbox1 = QListWidget()
self.old, self.new = None, None # +++
# self.lbox2 = QListWidget() # ---
self.lbox2 = ListWidget(self) # +++
self.lbox2.itemClicked.connect(self.lbox2._clicked) # +++
self.textbox1.setObjectName("textbox1")
self.textbox2.setObjectName("textbox2")
self.textbox3.setObjectName("textbox3")
self.lbox1.setObjectName("listbox1")
self.lbox2.setObjectName("listbox2")
vbox = QVBoxLayout(self)
vbox.addWidget(self.textbox1)
vbox.addWidget(self.textbox2)
vbox.addWidget(self.textbox3)
vbox.addWidget(self.lbox2)
self.current_textbox = None
QApplication.instance().focusChanged.connect(self.on_focusChanged)
self.textbox1.returnPressed.connect(lambda: self.textbox2.setFocus(Qt.ShortcutFocusReason))
self.textbox2.returnPressed.connect(lambda: self.textbox3.setFocus(Qt.ShortcutFocusReason))
self.textbox3.returnPressed.connect(lambda: self.textbox1.setFocus(Qt.ShortcutFocusReason))
def on_focusChanged(self, old, new):
fwidget = QApplication.focusWidget()
self.old, self.new = old, new # +++
if fwidget is not None:
if isinstance(new, QLineEdit) and new != self.current_textbox:
self.current_textbox = new
self.lbox1.clear()
self.lbox1.addItems(textbox_items[new.objectName()])
self.lbox2.clear()
self.lbox2.addItems(textbox_items[new.objectName()])
self.getdetails_1 = Sourcefile(self.current_textbox, self.lbox1, self.lbox2)
self.current_textbox.textChanged.connect(self.getdetails_1.func_textbox_textchanged)
def main():
myapp = QApplication(sys.argv)
mywin = Mclick_sample_main()
mywin.show()
sys.exit(myapp.exec_())
if __name__ == "__main__":
main()
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