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Diffstat (limited to 'examples/widgets/animation/easing/easing.py')
| -rw-r--r-- | examples/widgets/animation/easing/easing.py | 260 |
1 files changed, 260 insertions, 0 deletions
diff --git a/examples/widgets/animation/easing/easing.py b/examples/widgets/animation/easing/easing.py new file mode 100644 index 000000000..9989c81b5 --- /dev/null +++ b/examples/widgets/animation/easing/easing.py @@ -0,0 +1,260 @@ +#!/usr/bin/env python + +############################################################################# +## +## Copyright (C) 2010 Riverbank Computing Limited. +## Copyright (C) 2016 The Qt Company Ltd. +## Contact: http://www.qt.io/licensing/ +## +## This file is part of the PySide examples of the Qt Toolkit. +## +## $QT_BEGIN_LICENSE:BSD$ +## 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 The Qt Company Ltd 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 PySide2 import QtCore, QtGui, QtWidgets + +import easing_rc +from ui_form import Ui_Form + + +class Animation(QtCore.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 = QtGui.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(QtCore.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) + +# PySide2 doesn't support deriving from more than one wrapped class so we use +# composition and delegate the property. +class Pixmap(QtCore.QObject): + def __init__(self, pix): + super(Pixmap, self).__init__() + + self.pixmap_item = QtWidgets.QGraphicsPixmapItem(pix) + self.pixmap_item.setCacheMode(QtWidgets.QGraphicsItem.DeviceCoordinateCache) + + def set_pos(self, pos): + self.pixmap_item.setPos(pos) + + def get_pos(self): + return self.pixmap_item.pos() + + pos = QtCore.Property(QtCore.QPointF, get_pos, set_pos) + + +class Window(QtWidgets.QWidget): + def __init__(self, parent=None): + super(Window, self).__init__(parent) + + self.m_iconSize = QtCore.QSize(64, 64) + self.m_scene = QtWidgets.QGraphicsScene() + + m_ui = Ui_Form() + m_ui.setupUi(self) + m_ui.easingCurvePicker.setIconSize(self.m_iconSize) + m_ui.easingCurvePicker.setMinimumHeight(self.m_iconSize.height() + 50) + m_ui.buttonGroup.setId(m_ui.lineRadio, 0) + m_ui.buttonGroup.setId(m_ui.circleRadio, 1) + + dummy = QtCore.QEasingCurve() + m_ui.periodSpinBox.setValue(dummy.period()) + m_ui.amplitudeSpinBox.setValue(dummy.amplitude()) + m_ui.overshootSpinBox.setValue(dummy.overshoot()) + + m_ui.easingCurvePicker.currentRowChanged.connect(self.curveChanged) + m_ui.buttonGroup.buttonClicked[int].connect(self.pathChanged) + m_ui.periodSpinBox.valueChanged.connect(self.periodChanged) + m_ui.amplitudeSpinBox.valueChanged.connect(self.amplitudeChanged) + m_ui.overshootSpinBox.valueChanged.connect(self.overshootChanged) + + self.m_ui = m_ui + self.createCurveIcons() + + pix = QtGui.QPixmap(':/images/qt-logo.png') + self.m_item = Pixmap(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, 'pos') + self.m_anim.setEasingCurve(QtCore.QEasingCurve.OutBounce) + self.m_ui.easingCurvePicker.setCurrentRow(int(QtCore.QEasingCurve.OutBounce)) + + self.startAnimation() + + def createCurveIcons(self): + pix = QtGui.QPixmap(self.m_iconSize) + painter = QtGui.QPainter() + + gradient = QtGui.QLinearGradient(0, 0, 0, self.m_iconSize.height()) + gradient.setColorAt(0.0, QtGui.QColor(240, 240, 240)) + gradient.setColorAt(1.0, QtGui.QColor(224, 224, 224)) + + brush = QtGui.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 QtCore.QEasingCurve.__dict__.items() + if isinstance(c, QtCore.QEasingCurve.Type) \ + and c != QtCore.QEasingCurve.Custom \ + and c != QtCore.QEasingCurve.NCurveTypes \ + and c != QtCore.QEasingCurve.TCBSpline] + curve_types.sort(key=lambda ct: ct[1]) + + painter.begin(pix) + + for curve_name, curve_type in curve_types: + painter.fillRect(QtCore.QRect(QtCore.QPoint(0, 0), self.m_iconSize), brush) + curve = QtCore.QEasingCurve(curve_type) + + painter.setPen(QtGui.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(QtCore.Qt.NoPen) + + # Start point. + painter.setBrush(QtCore.Qt.red) + start = QtCore.QPoint(yAxis, + xAxis - curveScale * curve.valueForProgress(0)) + painter.drawRect(start.x() - 1, start.y() - 1, 3, 3) + + # End point. + painter.setBrush(QtCore.Qt.blue) + end = QtCore.QPoint(yAxis + curveScale, + xAxis - curveScale * curve.valueForProgress(1)) + painter.drawRect(end.x() - 1, end.y() - 1, 3, 3) + + curvePath = QtGui.QPainterPath() + curvePath.moveTo(QtCore.QPointF(start)) + t = 0.0 + while t <= 1.0: + to = QtCore.QPointF(yAxis + curveScale * t, + xAxis - curveScale * curve.valueForProgress(t)) + curvePath.lineTo(to) + t += 1.0 / curveScale + + painter.setRenderHint(QtGui.QPainter.Antialiasing, True) + painter.strokePath(curvePath, QtGui.QColor(32, 32, 32)) + painter.setRenderHint(QtGui.QPainter.Antialiasing, False) + + item = QtWidgets.QListWidgetItem() + item.setIcon(QtGui.QIcon(pix)) + item.setText(curve_name) + self.m_ui.easingCurvePicker.addItem(item) + + painter.end() + + def startAnimation(self): + self.m_anim.setStartValue(QtCore.QPointF(0, 0)) + self.m_anim.setEndValue(QtCore.QPointF(100, 100)) + self.m_anim.setDuration(2000) + self.m_anim.setLoopCount(-1) + self.m_anim.start() + + def curveChanged(self, row): + curveType = QtCore.QEasingCurve.Type(row) + self.m_anim.setEasingCurve(curveType) + self.m_anim.setCurrentTime(0) + + isElastic = (curveType >= QtCore.QEasingCurve.InElastic + and curveType <= QtCore.QEasingCurve.OutInElastic) + isBounce = (curveType >= QtCore.QEasingCurve.InBounce + and curveType <= QtCore.QEasingCurve.OutInBounce) + + self.m_ui.periodSpinBox.setEnabled(isElastic) + self.m_ui.amplitudeSpinBox.setEnabled(isElastic or isBounce) + self.m_ui.overshootSpinBox.setEnabled(curveType >= QtCore.QEasingCurve.InBack + and curveType <= QtCore.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 = QtWidgets.QApplication(sys.argv) + w = Window() + w.resize(600, 600) + w.show() + sys.exit(app.exec_()) |