class ItemMovel(QGraphicsWidget):
rectChanged = pyqtSignal()
def __init__(self, moveX=True, moveY=True, rect=QRectF(0, 0, 30, 30), parent=None):
super().__init__(parent)
self._movel = Movel(moveX, moveY, self)
self.installEventFilter(self._movel)
self._newPos = QPointF()
self._oldPos = QPointF()
self._rect = QRectF()
self._newRect = QRectF()
self._oldRect = QRectF()
self._timePos = QTimeLine(1000)
self._timePos.setCurveShape(QTimeLine.EaseInOutCurve)
self._timePos.valueChanged.connect(self._atualizaPos)
self._timeRect = QTimeLine(1000)
self._timeRect.valueChanged.connect(self._atualizaRect)
self.setTamanho(rect)
def setMoveXY(self, x, y):
self._movel.setMoveXY(x, y)
def getRect(self):
return self._rect
def setRect(self, rect):
self._rect = rect
self._atualizaGeometria()
def boundingRect(self):
return self._rect.adjusted(-1, -1, 1, 1)
def altura(self):
return self._newRect.height()
def _atualizaPos(self, t):
# Funcao da curva que parametriza um segmento AB
# C(t) = A + (B - A)*t
pos = self._oldPos + (self._newPos - self._oldPos) * t
self.setPos(pos)
self._atualizaGeometria()
def _atualizaRect(self, t):
oldP1 = self._oldRect.topLeft()
oldP2 = self._oldRect.bottomRight()
newP1 = self._newRect.topLeft()
newP2 = self._newRect.bottomRight()
p1 = oldP1 + (newP1 - oldP1) * t
p2 = oldP2 + (newP2 - oldP2) * t
self.setRect(QRectF(p1, p2))
def _atualizaGeometria(self):
self.setGeometry(QRectF(self.pos(), self.pos() + self._rect.bottomRight()))
def goto(self, pos):
if self.pos() == pos:
return
if self._timePos.state() == QTimeLine.Running:
self._timePos.stop()
self._oldPos = self.pos()
self._newPos = pos
self._timePos.start()
def setTamanho(self, tam):
if self._rect == tam:
return
if self._timeRect.state() == QTimeLine.Running:
self._timeRect.stop()
self._oldRect = self._rect
self._newRect = tam
self._timeRect.start()
self.rectChanged.emit()
def resize(self, size):
if isinstance(size, QRect):
size = size.size()
self.setTamanho(QRectF(0, 0, size.width() - 3, self._newRect.height()))
def paint(self, painter, widget, option):
if self._timePos.state() == QTimeLine.Running:
currentValue = self._timePos.currentValue()
nextValue = self._timePos.valueForTime(self._timePos.currentTime() + 100)
painter.setBrush(QColor(255, 0, 0, (nextValue - currentValue) * 150))
painter.drawRoundedRect(self._rect, 7, 5)
