面临将焦点从QListWidget更改为QLineEdit的问题。
如果从QLineEdit按down_arrow或up_arrow，焦点从QLineEdit更改为Qlistwidget，然后从QListWidget按left_arrow或back_space，焦点从QListwidget更改为QLineEdit。
假设QListWidget中的焦点，现在按任何字母或数字（A -z或-z或0-9），如何将焦点从QListwidget更改为QLineEdit，然后按该键QLineEdit Box中的值。 （例如，如果我从QListWidget按下“ H”，则焦点从QListWidget更改为QLineEdit，并且字符“ H”出现在最后一个位置））>
import sys
from PyQt5.QtGui import *
from PyQt5.QtWidgets import *
from PyQt5.QtCore import *
item = ["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"]
flag = 2
class Event_Handler(QWidget):
def __init__(self):
super().__init__()
self.setMinimumSize(350, 600)
self.textbox = QLineEdit()
self.textbox.installEventFilter(self)
self.textbox.textChanged.connect(self.func_textbox_textchanged)
self.listbox_dummy = QListWidget()
self.listbox_dummy.addItems(item)
self.listbox = QListWidget()
self.listbox.installEventFilter(self)
self.listbox.addItems(item)
self.label_1 = QLabel("Item Starts With (Alt+S)")
self.label_2 = QLabel("Item Contains (Alt+C)")
self.label_3 = QLabel("Item Ends With (Alt+E)")
vbox1 = QVBoxLayout()
vbox1.addWidget(self.textbox)
vbox1.addWidget(self.listbox)
vbox1.addWidget(self.label_1)
vbox1.addWidget(self.label_2)
vbox1.addWidget(self.label_3)
self.setLayout(vbox1)
def func_textbox_textchanged(self):
global search_text, search_text_lenth, total_listbox_items, startitem_rowno, enditem_rowno, \
startitem_count, containitem_count, enditem_count, item_normal, item_startswith, item_contains, \
item_endswith, flag
search_text = self.textbox.text()
search_text_length = len(search_text)
item_normal = self.listbox_dummy.findItems("*", Qt.MatchWildcard)
item_startswith = self.listbox_dummy.findItems(search_text, Qt.MatchStartsWith)
item_contains = self.listbox_dummy.findItems(search_text, Qt.MatchContains)
item_endswith = self.listbox_dummy.findItems(search_text, Qt.MatchEndsWith)
k = 0
dummy_list = []
for i in item_contains:
if ((i.text().lower())[0:search_text_length]) == (search_text.lower()):
dummy_list.append(k)
startitem_rowno = (dummy_list[0])
enditem_rowno = (dummy_list[-1])
k = k + 1
startitem_count = len(item_startswith)
containitem_count = len(item_contains)
enditem_count = len(item_endswith)
if search_text_length == 1:
flag = 1
self.listbox.clear()
if flag == 1:
self.func_item_startswith()
elif flag == 2:
self.func_item_contains()
elif flag == 3:
self.func_item_endswith()
elif flag == 0:
self.func_item_contains()
else:
self.func_item_normal()
if startitem_count == 0:
flag = 2
self.func_item_contains()
def func_item_startswith(self):
global flag
flag = 1
self.listbox.clear()
if startitem_count > 0:
for item in item_startswith:
self.listbox.addItem(item.text())
else:
print("No Matching from start item")
def func_item_contains(self):
global flag
flag = 2
self.listbox.clear()
if containitem_count > 0:
for item in item_contains:
self.listbox.addItem(item.text())
else:
print("No Matching from contains item")
def func_item_endswith(self):
global flag
flag = 3
self.listbox.clear()
if enditem_count > 0:
for item in item_endswith:
self.listbox.addItem(item.text())
else:
print("No Matching from end item")
def func_item_normal(self, normal_count=None):
global falg
flag = 0
self.listbox.clear()
if normal_count > 0:
for item in item_normal:
self.listbox.addItem(item.text())
def eventFilter(self, source, event):
global startitem_rowno, enditem_rowno
if event.type() == QEvent.KeyPress and source is self.textbox:
if event.modifiers() == Qt.AltModifier and event.key() == Qt.Key_S:
self.func_item_startswith()
return True
if event.key() == Qt.Key_C and event.modifiers() == Qt.AltModifier:
self.func_item_contains()
return True
if event.key() == Qt.Key_E and event.modifiers() == Qt.AltModifier:
self.func_item_endswith()
return True
if event.key() == Qt.Key_Down:
startitem_rowno = 0
if flag != 2:
startitem_rowno = 0
self.listbox.setFocus()
self.listbox.setCurrentRow(startitem_rowno)
if event.key() == Qt.Key_Up:
enditem_rowno = len(self.listbox) - 1
if flag != 2:
enditem_rowno = len(self.listbox) - 1
self.listbox.setFocus()
self.listbox.setCurrentRow(enditem_rowno)
if event.key() == Qt.Key_Return:
if len(self.listbox) == 1:
self.listbox.setCurrentRow(0)
self.textbox.setText(self.listbox.currentItem().text())
prin = self.listbox.currentItem().text()
if event.type() == QKeyEvent.KeyPress and source is self.listbox:
if event.key() == Qt.Key_Left or event.key() == Qt.Key_Backspace:
self.textbox.setFocus()
if event.key() == Qt.Key_Return:
self.textbox.setText(self.listbox.currentItem().text())
self.textbox.setFocus()
return super(Event_Handler, self).eventFilter(source, event)
if __name__ == '__main__':
myapp = QApplication(sys.argv)
mywin = Event_Handler()
mywin.show()
sys.exit(myapp.exec_())
面临着将焦点从QListWidget更改为QLineEdit的问题。如果我们从QLineEdit按down_arrow或up_arrow，焦点将从QLineEdit更改为Qlistwidget，然后按left_arrow或back_space ...
凭借我的Python和Pyqt5知识，我得到了一些解决方案