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 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()
