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Python pyqt (gui) example 'letteritem'
letteritem
Python pyqt example: letteritem
#############################################################################
##
## Copyright (C) 2013 Riverbank Computing Limited.
## Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
## All rights reserved.
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## This file is part of the examples of PyQt.
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## $QT_BEGIN_LICENSE:LGPL$
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## GNU Lesser General Public License Usage
## Alternatively, this file may be used under the terms of the GNU Lesser
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## packaging of this file. Please review the following information to
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## GNU General Public License Usage
## Alternatively, this file may be used under the terms of the GNU
## General Public License version 3.0 as published by the Free Software
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#############################################################################
from PyQt5.QtCore import QRect, Qt
from PyQt5.QtGui import QColor, QImage, QLinearGradient, QPainter
from colors import Colors
from demoitem import DemoItem
class LetterItem(DemoItem):
def __init__(self, letter, parent=None):
super(LetterItem, self).__init__(parent)
self.letter = letter
self.useSharedImage(__file__ + letter)
def createImage(self, transform):
scaledRect = transform.mapRect(QRect(0, 0, 25, 25))
image = QImage(scaledRect.width(), scaledRect.height(),
QImage.Format_ARGB32_Premultiplied)
image.fill(0)
painter = QPainter(image)
painter.scale(transform.m11(), transform.m22())
painter.setRenderHints(QPainter.TextAntialiasing | QPainter.Antialiasing | QPainter.SmoothPixmapTransform)
painter.setPen(Qt.NoPen)
if Colors.useEightBitPalette:
painter.setBrush(QColor(102, 175, 54))
painter.drawEllipse(0, 0, 25, 25)
painter.setFont(Colors.tickerFont())
painter.setPen(QColor(255, 255, 255))
painter.drawText(10, 15, self.letter)
else:
brush = QLinearGradient(0, 0, 0, 25)
brush.setSpread(QLinearGradient.PadSpread)
brush.setColorAt(0.0, QColor(102, 175, 54, 200))
brush.setColorAt(1.0, QColor(102, 175, 54, 60))
painter.setBrush(brush)
painter.drawEllipse(0, 0, 25, 25)
painter.setFont(Colors.tickerFont())
painter.setPen(QColor(255, 255, 255, 255))
painter.drawText(10, 15, self.letter)
return image
Useful links
- Learn PyQt: https://pythonbasics.org/pyqt-hello-world/
- Install PyQt: https://pythonbasics.org/install-pyqt/