b28b3994c7
Sometimes we want its "remember path" behaviour but it does not make sense to parent the dialog from main window. When so, caller code no longer needs to get a reference to a main window. Also rm last usages of get_parent_main_window().
123 lines
4.3 KiB
Python
123 lines
4.3 KiB
Python
#!/usr/bin/env python
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#
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# Electrum - lightweight Bitcoin client
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# Copyright (C) 2018 The Electrum developers
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#
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# Permission is hereby granted, free of charge, to any person
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# obtaining a copy of this software and associated documentation files
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# (the "Software"), to deal in the Software without restriction,
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# including without limitation the rights to use, copy, modify, merge,
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# publish, distribute, sublicense, and/or sell copies of the Software,
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# and to permit persons to whom the Software is furnished to do so,
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# subject to the following conditions:
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#
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# The above copyright notice and this permission notice shall be
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# included in all copies or substantial portions of the Software.
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#
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# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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# BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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# ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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# CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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# SOFTWARE.
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from PyQt5.QtGui import QTextCursor
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from PyQt5.QtCore import Qt
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from PyQt5.QtWidgets import QCompleter, QPlainTextEdit, QApplication
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from .util import ButtonsTextEdit
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class CompletionTextEdit(ButtonsTextEdit):
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def __init__(self):
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ButtonsTextEdit.__init__(self)
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self.completer = None
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self.moveCursor(QTextCursor.End)
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self.disable_suggestions()
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def set_completer(self, completer):
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self.completer = completer
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self.initialize_completer()
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def initialize_completer(self):
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self.completer.setWidget(self)
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self.completer.setCompletionMode(QCompleter.PopupCompletion)
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self.completer.activated.connect(self.insert_completion)
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self.enable_suggestions()
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def insert_completion(self, completion):
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if self.completer.widget() != self:
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return
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text_cursor = self.textCursor()
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extra = len(completion) - len(self.completer.completionPrefix())
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text_cursor.movePosition(QTextCursor.Left)
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text_cursor.movePosition(QTextCursor.EndOfWord)
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if extra == 0:
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text_cursor.insertText(" ")
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else:
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text_cursor.insertText(completion[-extra:] + " ")
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self.setTextCursor(text_cursor)
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def text_under_cursor(self):
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tc = self.textCursor()
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tc.select(QTextCursor.WordUnderCursor)
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return tc.selectedText()
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def enable_suggestions(self):
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self.suggestions_enabled = True
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def disable_suggestions(self):
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self.suggestions_enabled = False
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def keyPressEvent(self, e):
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if self.isReadOnly():
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return
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if self.is_special_key(e):
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e.ignore()
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return
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QPlainTextEdit.keyPressEvent(self, e)
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ctrlOrShift = e.modifiers() and (Qt.ControlModifier or Qt.ShiftModifier)
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if self.completer is None or (ctrlOrShift and not e.text()):
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return
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if not self.suggestions_enabled:
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return
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eow = "~!@#$%^&*()_+{}|:\"<>?,./;'[]\\-="
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hasModifier = (e.modifiers() != Qt.NoModifier) and not ctrlOrShift
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completionPrefix = self.text_under_cursor()
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if hasModifier or not e.text() or len(completionPrefix) < 1 or eow.find(e.text()[-1]) >= 0:
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self.completer.popup().hide()
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return
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if completionPrefix != self.completer.completionPrefix():
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self.completer.setCompletionPrefix(completionPrefix)
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self.completer.popup().setCurrentIndex(self.completer.completionModel().index(0, 0))
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cr = self.cursorRect()
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cr.setWidth(self.completer.popup().sizeHintForColumn(0) + self.completer.popup().verticalScrollBar().sizeHint().width())
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self.completer.complete(cr)
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def is_special_key(self, e):
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if self.completer and self.completer.popup().isVisible():
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if e.key() in (Qt.Key_Enter, Qt.Key_Return):
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return True
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if e.key() == Qt.Key_Tab:
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return True
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return False
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if __name__ == "__main__":
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app = QApplication([])
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completer = QCompleter(["alabama", "arkansas", "avocado", "breakfast", "sausage"])
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te = CompletionTextEdit()
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te.set_completer(completer)
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te.show()
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app.exec_()
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