105 lines
3.4 KiB
Python
105 lines
3.4 KiB
Python
# vim: ft=python fileencoding=utf-8 sts=4 sw=4 et:
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# Copyright 2014-2017 Florian Bruhin (The Compiler) <mail@qutebrowser.org>
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#
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# This file is part of qutebrowser.
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#
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# qutebrowser is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# qutebrowser is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with qutebrowser. If not, see <http://www.gnu.org/licenses/>.
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"""Base text widgets for statusbar."""
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from PyQt5.QtCore import Qt
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from PyQt5.QtWidgets import QLabel, QSizePolicy
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from PyQt5.QtGui import QPainter
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from qutebrowser.utils import qtutils, utils
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class TextBase(QLabel):
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"""A text in the statusbar.
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Unlike QLabel, the text will get elided.
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Eliding is loosely based on
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http://gedgedev.blogspot.ch/2010/12/elided-labels-in-qt.html
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Attributes:
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_elidemode: Where to elide the text.
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_elided_text: The current elided text.
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"""
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def __init__(self, parent=None, elidemode=Qt.ElideRight):
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super().__init__(parent)
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self.setSizePolicy(QSizePolicy.Preferred, QSizePolicy.Minimum)
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self._elidemode = elidemode
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self._elided_text = ''
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def __repr__(self):
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return utils.get_repr(self, text=self.text())
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def _update_elided_text(self, width):
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"""Update the elided text when necessary.
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Args:
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width: The maximal width the text should take.
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"""
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if self.text():
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self._elided_text = self.fontMetrics().elidedText(
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self.text(), self._elidemode, width, Qt.TextShowMnemonic)
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else:
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self._elided_text = ''
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def setText(self, txt):
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"""Extend QLabel::setText.
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This update the elided text after setting the text, and also works
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around a weird QLabel redrawing bug where it doesn't redraw correctly
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when the text is empty -- we explicitly need to call repaint() to
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resolve this.
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More info:
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http://stackoverflow.com/q/21890462/2085149
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https://bugreports.qt.io/browse/QTBUG-36945
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https://codereview.qt-project.org/#/c/79181/
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Args:
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txt: The text to set (string).
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"""
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super().setText(txt)
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self._update_elided_text(self.geometry().width())
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if not txt:
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# WORKAROUND
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self.repaint()
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def resizeEvent(self, e):
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"""Extend QLabel::resizeEvent to update the elided text afterwards."""
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super().resizeEvent(e)
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size = e.size()
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qtutils.ensure_valid(size)
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self._update_elided_text(size.width())
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def paintEvent(self, e):
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"""Override QLabel::paintEvent to draw elided text."""
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if self._elidemode == Qt.ElideNone:
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super().paintEvent(e)
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else:
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e.accept()
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painter = QPainter(self)
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geom = self.geometry()
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qtutils.ensure_valid(geom)
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painter.drawText(0, 0, geom.width(), geom.height(),
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self.alignment(), self._elided_text)
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