mirror of
https://github.com/pyqt/examples.git
synced 2025-08-23 10:07:18 +00:00
54f8b69baa
The commits since then moved many files into the src/ subdirectory. This would have broken existing links on the internet. To solve this, we leave the master branch as-is and make such breaking changes on a different branch.
268 lines
10 KiB
Python
268 lines
10 KiB
Python
#!/usr/bin/env python
|
|
|
|
|
|
#############################################################################
|
|
##
|
|
## Copyright (C) 2013 Riverbank Computing Limited.
|
|
## Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
|
|
## All rights reserved.
|
|
##
|
|
## This file is part of the examples of PyQt.
|
|
##
|
|
## $QT_BEGIN_LICENSE:BSD$
|
|
## You may use this file under the terms of the BSD license as follows:
|
|
##
|
|
## "Redistribution and use in source and binary forms, with or without
|
|
## modification, are permitted provided that the following conditions are
|
|
## met:
|
|
## * Redistributions of source code must retain the above copyright
|
|
## notice, this list of conditions and the following disclaimer.
|
|
## * Redistributions in binary form must reproduce the above copyright
|
|
## notice, this list of conditions and the following disclaimer in
|
|
## the documentation and/or other materials provided with the
|
|
## distribution.
|
|
## * Neither the name of Nokia Corporation and its Subsidiary(-ies) nor
|
|
## the names of its contributors may be used to endorse or promote
|
|
## products derived from this software without specific prior written
|
|
## permission.
|
|
##
|
|
## THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
|
## "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
|
## LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
|
|
## A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
|
|
## OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
|
|
## SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
|
|
## LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
|
|
## DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
|
|
## THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
|
## (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
|
|
## OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
|
|
## $QT_END_LICENSE$
|
|
##
|
|
#############################################################################
|
|
|
|
|
|
from PyQt5.QtCore import (pyqtProperty, QEasingCurve, QObject, QPoint, QPointF,
|
|
QPropertyAnimation, QRect, QRectF, QSize, Qt)
|
|
from PyQt5.QtGui import (QBrush, QColor, QIcon, QLinearGradient, QPainter,
|
|
QPainterPath, QPixmap)
|
|
from PyQt5.QtWidgets import (QApplication, QGraphicsPixmapItem, QGraphicsScene,
|
|
QListWidgetItem, QWidget)
|
|
|
|
import easing_rc
|
|
from ui_form import Ui_Form
|
|
|
|
|
|
class Animation(QPropertyAnimation):
|
|
LinearPath, CirclePath = range(2)
|
|
|
|
def __init__(self, target, prop):
|
|
super(Animation, self).__init__(target, prop)
|
|
|
|
self.setPathType(Animation.LinearPath)
|
|
|
|
def setPathType(self, pathType):
|
|
self.m_pathType = pathType
|
|
self.m_path = QPainterPath()
|
|
|
|
def updateCurrentTime(self, currentTime):
|
|
if self.m_pathType == Animation.CirclePath:
|
|
if self.m_path.isEmpty():
|
|
end = self.endValue()
|
|
start = self.startValue()
|
|
self.m_path.moveTo(start)
|
|
self.m_path.addEllipse(QRectF(start, end))
|
|
|
|
dura = self.duration()
|
|
if dura == 0:
|
|
progress = 1.0
|
|
else:
|
|
progress = (((currentTime - 1) % dura) + 1) / float(dura)
|
|
|
|
easedProgress = self.easingCurve().valueForProgress(progress)
|
|
if easedProgress > 1.0:
|
|
easedProgress -= 1.0
|
|
elif easedProgress < 0:
|
|
easedProgress += 1.0
|
|
|
|
pt = self.m_path.pointAtPercent(easedProgress)
|
|
self.updateCurrentValue(pt)
|
|
self.valueChanged.emit(pt)
|
|
else:
|
|
super(Animation, self).updateCurrentTime(currentTime)
|
|
|
|
|
|
# PyQt doesn't support deriving from more than one wrapped class so we use
|
|
# composition and delegate the property.
|
|
class PixmapItem(QObject):
|
|
def __init__(self, pix):
|
|
super(PixmapItem, self).__init__()
|
|
|
|
self.pixmap_item = QGraphicsPixmapItem(pix)
|
|
|
|
def _set_pos(self, pos):
|
|
self.pixmap_item.setPos(pos)
|
|
|
|
pos = pyqtProperty(QPointF, fset=_set_pos)
|
|
|
|
|
|
class Window(QWidget):
|
|
def __init__(self, parent=None):
|
|
super(QWidget, self).__init__(parent)
|
|
|
|
self.m_iconSize = QSize(64, 64)
|
|
self.m_scene = QGraphicsScene()
|
|
self.m_ui = Ui_Form()
|
|
|
|
self.m_ui.setupUi(self)
|
|
self.m_ui.easingCurvePicker.setIconSize(self.m_iconSize)
|
|
self.m_ui.easingCurvePicker.setMinimumHeight(self.m_iconSize.height() + 50)
|
|
self.m_ui.buttonGroup.setId(self.m_ui.lineRadio, 0)
|
|
self.m_ui.buttonGroup.setId(self.m_ui.circleRadio, 1)
|
|
|
|
dummy = QEasingCurve()
|
|
self.m_ui.periodSpinBox.setValue(dummy.period())
|
|
self.m_ui.amplitudeSpinBox.setValue(dummy.amplitude())
|
|
self.m_ui.overshootSpinBox.setValue(dummy.overshoot())
|
|
|
|
self.m_ui.easingCurvePicker.currentRowChanged.connect(self.curveChanged)
|
|
self.m_ui.buttonGroup.buttonClicked[int].connect(self.pathChanged)
|
|
self.m_ui.periodSpinBox.valueChanged.connect(self.periodChanged)
|
|
self.m_ui.amplitudeSpinBox.valueChanged.connect(self.amplitudeChanged)
|
|
self.m_ui.overshootSpinBox.valueChanged.connect(self.overshootChanged)
|
|
self.createCurveIcons()
|
|
|
|
pix = QPixmap(':/images/qt-logo.png')
|
|
self.m_item = PixmapItem(pix)
|
|
self.m_scene.addItem(self.m_item.pixmap_item)
|
|
self.m_ui.graphicsView.setScene(self.m_scene)
|
|
|
|
self.m_anim = Animation(self.m_item, b'pos')
|
|
self.m_anim.setEasingCurve(QEasingCurve.OutBounce)
|
|
self.m_ui.easingCurvePicker.setCurrentRow(int(QEasingCurve.OutBounce))
|
|
|
|
self.startAnimation()
|
|
|
|
def createCurveIcons(self):
|
|
pix = QPixmap(self.m_iconSize)
|
|
painter = QPainter()
|
|
|
|
gradient = QLinearGradient(0, 0, 0, self.m_iconSize.height())
|
|
gradient.setColorAt(0.0, QColor(240, 240, 240))
|
|
gradient.setColorAt(1.0, QColor(224, 224, 224))
|
|
|
|
brush = QBrush(gradient)
|
|
|
|
# The original C++ code uses undocumented calls to get the names of the
|
|
# different curve types. We do the Python equivalant (but without
|
|
# cheating).
|
|
curve_types = [(n, c) for n, c in QEasingCurve.__dict__.items()
|
|
if isinstance(c, QEasingCurve.Type) and c != QEasingCurve.Custom]
|
|
curve_types.sort(key=lambda ct: ct[1])
|
|
|
|
painter.begin(pix)
|
|
|
|
for curve_name, curve_type in curve_types:
|
|
painter.fillRect(QRect(QPoint(0, 0), self.m_iconSize), brush)
|
|
|
|
curve = QEasingCurve(curve_type)
|
|
|
|
if curve_type == QEasingCurve.BezierSpline:
|
|
curve.addCubicBezierSegment(QPointF(0.4, 0.1),
|
|
QPointF(0.6, 0.9), QPointF(1.0, 1.0))
|
|
elif curve_type == QEasingCurve.TCBSpline:
|
|
curve.addTCBSegment(QPointF(0.0, 0.0), 0, 0, 0)
|
|
curve.addTCBSegment(QPointF(0.3, 0.4), 0.2, 1, -0.2)
|
|
curve.addTCBSegment(QPointF(0.7, 0.6), -0.2, 1, 0.2)
|
|
curve.addTCBSegment(QPointF(1.0, 1.0), 0, 0, 0)
|
|
|
|
painter.setPen(QColor(0, 0, 255, 64))
|
|
xAxis = self.m_iconSize.height() / 1.5
|
|
yAxis = self.m_iconSize.width() / 3.0
|
|
painter.drawLine(0, xAxis, self.m_iconSize.width(), xAxis)
|
|
painter.drawLine(yAxis, 0, yAxis, self.m_iconSize.height())
|
|
|
|
curveScale = self.m_iconSize.height() / 2.0;
|
|
|
|
painter.setPen(Qt.NoPen)
|
|
|
|
# Start point.
|
|
painter.setBrush(Qt.red)
|
|
start = QPoint(yAxis,
|
|
xAxis - curveScale * curve.valueForProgress(0))
|
|
painter.drawRect(start.x() - 1, start.y() - 1, 3, 3)
|
|
|
|
# End point.
|
|
painter.setBrush(Qt.blue)
|
|
end = QPoint(yAxis + curveScale,
|
|
xAxis - curveScale * curve.valueForProgress(1))
|
|
painter.drawRect(end.x() - 1, end.y() - 1, 3, 3)
|
|
|
|
curvePath = QPainterPath()
|
|
curvePath.moveTo(QPointF(start))
|
|
t = 0.0
|
|
while t <= 1.0:
|
|
to = QPointF(yAxis + curveScale * t,
|
|
xAxis - curveScale * curve.valueForProgress(t))
|
|
curvePath.lineTo(to)
|
|
t += 1.0 / curveScale
|
|
|
|
painter.setRenderHint(QPainter.Antialiasing, True)
|
|
painter.strokePath(curvePath, QColor(32, 32, 32))
|
|
painter.setRenderHint(QPainter.Antialiasing, False)
|
|
|
|
item = QListWidgetItem()
|
|
item.setIcon(QIcon(pix))
|
|
item.setText(curve_name)
|
|
self.m_ui.easingCurvePicker.addItem(item)
|
|
|
|
painter.end()
|
|
|
|
def startAnimation(self):
|
|
self.m_anim.setStartValue(QPointF(0, 0))
|
|
self.m_anim.setEndValue(QPointF(100, 100))
|
|
self.m_anim.setDuration(2000)
|
|
self.m_anim.setLoopCount(-1)
|
|
self.m_anim.start()
|
|
|
|
def curveChanged(self, row):
|
|
curveType = QEasingCurve.Type(row)
|
|
self.m_anim.setEasingCurve(curveType)
|
|
self.m_anim.setCurrentTime(0)
|
|
|
|
isElastic = (curveType >= QEasingCurve.InElastic and curveType <= QEasingCurve.OutInElastic)
|
|
isBounce = (curveType >= QEasingCurve.InBounce and curveType <= QEasingCurve.OutInBounce)
|
|
|
|
self.m_ui.periodSpinBox.setEnabled(isElastic)
|
|
self.m_ui.amplitudeSpinBox.setEnabled(isElastic or isBounce)
|
|
self.m_ui.overshootSpinBox.setEnabled(curveType >= QEasingCurve.InBack and curveType <= QEasingCurve.OutInBack)
|
|
|
|
def pathChanged(self, index):
|
|
self.m_anim.setPathType(index)
|
|
|
|
def periodChanged(self, value):
|
|
curve = self.m_anim.easingCurve()
|
|
curve.setPeriod(value)
|
|
self.m_anim.setEasingCurve(curve)
|
|
|
|
def amplitudeChanged(self, value):
|
|
curve = self.m_anim.easingCurve()
|
|
curve.setAmplitude(value)
|
|
self.m_anim.setEasingCurve(curve)
|
|
|
|
def overshootChanged(self, value):
|
|
curve = self.m_anim.easingCurve()
|
|
curve.setOvershoot(value)
|
|
self.m_anim.setEasingCurve(curve)
|
|
|
|
|
|
if __name__ == '__main__':
|
|
|
|
import sys
|
|
|
|
app = QApplication(sys.argv)
|
|
w = Window()
|
|
w.resize(400, 400)
|
|
w.show()
|
|
sys.exit(app.exec_())
|