def keyPressEvent(self, ev):
if ev.key() == Qt.Key.Key_X and ev.modifiers() == Qt.KeyboardModifier.AltModifier:
if self.replace_possible_unicode_sequence():
ev.accept()
return
if ev.key() == Qt.Key.Key_Insert:
self.setOverwriteMode(self.overwriteMode() ^ True)
ev.accept()
return
if self.snippet_manager.handle_key_press(ev):
self.completion_popup.hide()
return
if self.smarts.handle_key_press(ev, self):
self.handle_keypress_completion(ev)
return
QPlainTextEdit.keyPressEvent(self, ev)
self.handle_keypress_completion(ev)
def keyPressEvent(self, ev):
if ev.key() == Qt.Key.Key_Insert:
self.setOverwriteMode(self.overwriteMode() ^ True)
ev.accept()
return
key = ev.key()
if key == Qt.Key_Tab or key == Qt.Key_Backtab:
'''
Handle indenting usingTab and Shift Tab. This is remarkably
difficult because of the way Qt represents the edit buffer.
Selections represent the start and end as character positions in the
buffer. To convert a position into a line number we must get the
block number containing that position. You so this by setting a
cursor to that position.
To get the text of a line we must convert the line number (the
block number) to a block and then fetch the text from that.
To change text we must create a cursor that selects all the text on
the line. Because cursors use document positions, not block numbers
or blocks, we must convert line numbers to blocks then get the
position of the first character of the block. We then "extend" the
selection to the end by computing the end position: the start + the
length of the text on the line. We then uses that cursor to
"insert" the new text, which magically replaces the selected text.
'''
# Get the position of the start and end of the selection.
cursor = self.textCursor()
start_position = cursor.selectionStart()
end_position = cursor.selectionEnd()
# Now convert positions into block (line) numbers
cursor.setPosition(start_position)
start_block = cursor.block().blockNumber()
cursor.setPosition(end_position)
end_block = cursor.block().blockNumber()
def select_block(block_number, curs):
# Note the side effect: 'curs' is changed to select the line
blk = self.document().findBlockByNumber(block_number)
txt = blk.text()
pos = blk.position()
curs.setPosition(pos)
curs.setPosition(pos+len(txt), QTextCursor.KeepAnchor)
return txt
# Check if there is a selection. If not then only Shift-Tab is valid
if start_position == end_position:
if key == Qt.Key_Backtab:
txt = select_block(start_block, cursor)
if txt.startswith('\t'):
# This works because of the side effect in select_block()
cursor.insertText(txt[1:])
cursor.setPosition(start_position-1)
self.setTextCursor(cursor)
ev.accept()
else:
QPlainTextEdit.keyPressEvent(self, ev)
return
# There is a selection so both Tab and Shift-Tab do indenting operations
for bn in range(start_block, end_block+1):
txt = select_block(bn, cursor)
if key == Qt.Key_Backtab:
if txt.startswith('\t'):
cursor.insertText(txt[1:])
if bn == start_block:
start_position -= 1
end_position -= 1
else:
cursor.insertText('\t' + txt)
if bn == start_block:
start_position += 1
end_position += 1
# Restore the selection, adjusted for the added or deleted tabs
cursor.setPosition(start_position)
cursor.setPosition(end_position, QTextCursor.KeepAnchor)
self.setTextCursor(cursor)
ev.accept()
return
QPlainTextEdit.keyPressEvent(self, ev)