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dupeguru/qtlib/search_edit.py
Andrew Senetar 7ba8aa3514
Format files with black
- Format all files with black
- Update tox.ini flake8 arguments to be compatible
- Add black to requirements-extra.txt
- Reduce ignored flake8 rules and fix a few violations
2019-12-31 20:16:27 -06:00

129 lines
4.5 KiB
Python

# Created By: Virgil Dupras
# Created On: 2009-12-10
# Copyright 2015 Hardcoded Software (http://www.hardcoded.net)
#
# This software is licensed under the "GPLv3" License as described in the "LICENSE" file,
# which should be included with this package. The terms are also available at
# http://www.gnu.org/licenses/gpl-3.0.html
from PyQt5.QtCore import pyqtSignal, Qt
from PyQt5.QtGui import QIcon, QPixmap, QPainter, QPalette
from PyQt5.QtWidgets import QToolButton, QLineEdit, QStyle, QStyleOptionFrame
from hscommon.trans import trget
tr = trget("qtlib")
# IMPORTANT: For this widget to work propertly, you have to add "search_clear_13" from the
# "images" folder in your resources.
class LineEditButton(QToolButton):
def __init__(self, parent, **kwargs):
super().__init__(parent, **kwargs)
pixmap = QPixmap(":/search_clear_13")
self.setIcon(QIcon(pixmap))
self.setIconSize(pixmap.size())
self.setCursor(Qt.ArrowCursor)
self.setPopupMode(QToolButton.InstantPopup)
stylesheet = "QToolButton { border: none; padding: 0px; }"
self.setStyleSheet(stylesheet)
class ClearableEdit(QLineEdit):
def __init__(self, parent=None, is_clearable=True, **kwargs):
super().__init__(parent, **kwargs)
self._is_clearable = is_clearable
if is_clearable:
self._clearButton = LineEditButton(self)
frameWidth = self.style().pixelMetric(QStyle.PM_DefaultFrameWidth)
paddingRight = self._clearButton.sizeHint().width() + frameWidth + 1
stylesheet = "QLineEdit {{ padding-right:{0}px; }}".format(paddingRight)
self.setStyleSheet(stylesheet)
self._updateClearButton()
self._clearButton.clicked.connect(self._clearSearch)
self.textChanged.connect(self._textChanged)
# --- Private
def _clearSearch(self):
self.clear()
def _updateClearButton(self):
self._clearButton.setVisible(self._hasClearableContent())
def _hasClearableContent(self):
return bool(self.text())
# --- QLineEdit overrides
def resizeEvent(self, event):
if self._is_clearable:
frameWidth = self.style().pixelMetric(QStyle.PM_DefaultFrameWidth)
rect = self.rect()
rightHint = self._clearButton.sizeHint()
rightX = rect.right() - frameWidth - rightHint.width()
rightY = (rect.bottom() - rightHint.height()) // 2
self._clearButton.move(rightX, rightY)
# --- Event Handlers
def _textChanged(self, text):
if self._is_clearable:
self._updateClearButton()
class SearchEdit(ClearableEdit):
def __init__(self, parent=None, immediate=False):
# immediate: send searchChanged signals at each keystroke.
ClearableEdit.__init__(self, parent, is_clearable=True)
self.inactiveText = tr("Search...")
self.immediate = immediate
self.returnPressed.connect(self._returnPressed)
# --- Overrides
def _clearSearch(self):
ClearableEdit._clearSearch(self)
self.searchChanged.emit()
def _textChanged(self, text):
ClearableEdit._textChanged(self, text)
if self.immediate:
self.searchChanged.emit()
def keyPressEvent(self, event):
key = event.key()
if key == Qt.Key_Escape:
self._clearSearch()
else:
ClearableEdit.keyPressEvent(self, event)
def paintEvent(self, event):
ClearableEdit.paintEvent(self, event)
if not bool(self.text()) and self.inactiveText and not self.hasFocus():
panel = QStyleOptionFrame()
self.initStyleOption(panel)
textRect = self.style().subElementRect(
QStyle.SE_LineEditContents, panel, self
)
leftMargin = 2
rightMargin = self._clearButton.iconSize().width()
textRect.adjust(leftMargin, 0, -rightMargin, 0)
painter = QPainter(self)
disabledColor = (
self.palette().brush(QPalette.Disabled, QPalette.Text).color()
)
painter.setPen(disabledColor)
painter.drawText(
textRect, Qt.AlignLeft | Qt.AlignVCenter, self.inactiveText
)
# --- Event Handlers
def _returnPressed(self):
if not self.immediate:
self.searchChanged.emit()
# --- Signals
searchChanged = (
pyqtSignal()
) # Emitted when return is pressed or when the test is cleared