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#!/usr/bin/env python
"""
delegates.py
Copyright (C) 2006 David Boddie
This file is part of PyPI Browser, a GUI browser for the Python Package Index.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
"""
from PyQt4.QtCore import Qt
from PyQt4.QtGui import QItemDelegate, QPalette, QPen, QStyle
try:
from PyQt4.QtGui import QStylePainter, QStyleOptionProgressBarV2
with_style = True
except ImportError:
with_style = False
class ProgressDelegate(QItemDelegate):
"""ProgressDelegate(QItemDelegate)
A custom delegate that displays data obtained from a model in the form
of a progress bar.
The text used on the bar is obtained for a given model index using the
standard DisplayRole, and the percentage value indicating the progress
of some operation is obtained using the UserRole.
"""
def __init__(self, parent = None):
QItemDelegate.__init__(self, parent)
def paint(self, painter, option, index):
"""paint(self, painter, option, index)
Paints the contents of the delegate using the given painter to
perform painting operations. The specified option contains
information about the paint device.
The contents of the delegate are obtained from a model using the
specified model index.
"""
value = index.data(Qt.UserRole)
if not value.isValid():
return QItemDelegate.paint(self, painter, option, index)
else:
percentage = value.toDouble()[0]
painter.setPen(Qt.NoPen)
if option.state & QStyle.State_Selected:
backgroundBrush = option.palette.alternateBase()
labelBrush = option.palette.highlight()
color = labelBrush.color()
color.setAlpha(127)
labelBrush.setColor(color)
else:
backgroundBrush = option.palette.base()
labelBrush = option.palette.highlight()
color = labelBrush.color()
color.setAlpha(127)
labelBrush.setColor(color)
painter.setBrush(backgroundBrush)
painter.drawRect(option.rect)
if with_style:
stylePainter = QStylePainter()
stylePainter.begin(painter.device(), self.parent())
progressOption = QStyleOptionProgressBarV2()
progressOption.initFrom(self.parent())
progressOption.rect = option.rect
progressOption.minimum = 0
progressOption.maximum = 100
progressOption.progress = int(percentage)
progressOption.text = index.data(Qt.DisplayRole).toString()
progressOption.textAlignment = Qt.AlignCenter
progressOption.textVisible = True
stylePainter.drawControl(QStyle.CE_ProgressBar, progressOption)
stylePainter.end()
else:
painter.setBrush(labelBrush)
w = option.rect.width() * percentage/100.0
painter.drawRect(option.rect.x(), option.rect.y(),
w, option.rect.height())
if option.state & QStyle.State_Selected:
painter.setPen(QPen(option.palette.color(QPalette.HighlightedText)))
else:
painter.setPen(QPen(option.palette.color(QPalette.Text)))
painter.setFont(option.font)
painter.drawText(option.rect, Qt.AlignCenter,
index.data(Qt.DisplayRole).toString())
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