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#!/usr/bin/env python
from PySide import QtCore, QtGui
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)
# PyQt 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 = QtGui.QGraphicsPixmapItem(pix)
self.pixmap_item.setCacheMode(QtGui.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(QtGui.QWidget):
def __init__(self, parent=None):
super(Window, self).__init__(parent)
self.m_iconSize = QtCore.QSize(64, 64)
self.m_scene = QtGui.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]
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 = QtGui.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 = QtGui.QApplication(sys.argv)
w = Window()
w.resize(600, 600)
w.show()
sys.exit(app.exec_())
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