def drawBackground(self, painter, rect):
super(NodeScene, self).drawBackground(painter, rect)
painter.save()
painter.setRenderHint(QtGui.QPainter.Antialiasing, False)
painter.setBrush(self.backgroundBrush())
if not self._grid:
painter.restore()
return
zoom = self.viewer().get_zoom()
if zoom > -0.5:
pen = QtGui.QPen(QtGui.QColor(*self.grid_color), 0.65)
self._draw_grid(painter, rect, pen, VIEWER_GRID_SIZE)
color = self._bg_qcolor.darker(150)
if zoom < -0.0:
color = color.darker(100 - int(zoom * 110))
pen = QtGui.QPen(color, 0.65)
self._draw_grid(painter, rect, pen, VIEWER_GRID_SIZE * 8)
painter.restore()
def highlight(self):
self._highlight = True
color = QtGui.QColor(*PIPE_HIGHLIGHT_COLOR)
pen = QtGui.QPen(color, 2, PIPE_STYLES.get(PIPE_STYLE_DEFAULT))
self.setPen(pen)
self.__arrow.setBrush(QtGui.QBrush(color.darker(200)))
self.__arrow.setPen(QtGui.QPen(color, 0.8))
def paint(self, painter, option, widget):
"""
Draws the circular port.
Args:
painter (QtGui.QPainter): painter used for drawing the item.
option (QtGui.QStyleOptionGraphicsItem):
used to describe the parameters needed to draw.
widget (QtWidgets.QWidget): not used.
"""
painter.save()
rect = QtCore.QRectF(0.0, 0.8, self._width, self._height)
painter.setBrush(QtGui.QColor(0, 0, 0, 200))
painter.setPen(QtGui.QPen(QtGui.QColor(0, 0, 0, 255), 1.8))
path = QtGui.QPainterPath()
path.addEllipse(rect)
painter.drawPath(path)
if self._hovered:
color = QtGui.QColor(*PORT_HOVER_COLOR)
border_color = QtGui.QColor(*PORT_HOVER_BORDER_COLOR)
elif self.connected_pipes:
color = QtGui.QColor(*PORT_ACTIVE_COLOR)
border_color = QtGui.QColor(*PORT_ACTIVE_BORDER_COLOR)
else:
color = QtGui.QColor(*self.color)
border_color = QtGui.QColor(*self.border_color)
painter.setBrush(color)
pen = QtGui.QPen(border_color, 1.5)
painter.setPen(pen)
painter.drawEllipse(self.boundingRect())
painter.restore()
def drawBackground(self, painter, rect):
painter.save()
bg_color = QtGui.QColor(*self._bg_color)
painter.setRenderHint(QtGui.QPainter.Antialiasing, False)
painter.setBrush(bg_color)
painter.drawRect(rect)
if not self._grid:
painter.restore()
return
zoom = self.viewer().get_zoom()
grid_size = 20
if zoom > -0.5:
pen = QtGui.QPen(QtGui.QColor(*self.grid_color), 0.65)
self._draw_grid(painter, rect, pen, grid_size)
color = bg_color.darker(150)
if zoom < -0.0:
color = color.darker(100 - int(zoom * 110))
pen = QtGui.QPen(color, 0.65)
self._draw_grid(painter, rect, pen, grid_size * 8)
# fix border issue on the scene edge.
pen = QtGui.QPen(bg_color, 2)
pen.setCosmetic(True)
path = QtGui.QPainterPath()
path.addRect(rect)
painter.setBrush(QtCore.Qt.NoBrush)
painter.setPen(pen)
painter.drawPath(path)
painter.restore()
def paint(self, painter, option, index):
"""
Args:
painter (QtGui.QPainter):
option (QtGui.QStyleOptionViewItem):
index (QtCore.QModelIndex):
"""
painter.save()
painter.setRenderHint(QtGui.QPainter.Antialiasing, False)
painter.setPen(QtCore.Qt.NoPen)
painter.setBrush(option.palette.midlight())
painter.drawRect(option.rect)
if option.state & QtWidgets.QStyle.State_Selected:
bdr_clr = option.palette.highlight().color()
painter.setPen(QtGui.QPen(bdr_clr, 1.5))
else:
bdr_clr = option.palette.alternateBase().color()
painter.setPen(QtGui.QPen(bdr_clr, 1))
painter.setBrush(QtCore.Qt.NoBrush)
painter.drawRect(QtCore.QRect(option.rect.x() + 1,
option.rect.y() + 1,
option.rect.width() - 2,
option.rect.height() - 2))
painter.restore()
def activate(self):
self._active = True
color = QtGui.QColor(*PIPE_ACTIVE_COLOR)
pen = QtGui.QPen(color, 2, PIPE_STYLES.get(PIPE_STYLE_DEFAULT))
self.setPen(pen)
self.__arrow.setBrush(QtGui.QBrush(color.darker(200)))
self.__arrow.setPen(QtGui.QPen(color, 0.8))
def reset(self):
self._active = False
self._highlight = False
color = QtGui.QColor(*self.color)
pen = QtGui.QPen(color, 2, PIPE_STYLES.get(self.style))
self.setPen(pen)
self.__arrow.setBrush(QtGui.QBrush(color.darker(130)))
self.__arrow.setPen(QtGui.QPen(color, 0.6))
def paint(self, painter, option, widget):
"""
Draws the connection line between nodes.
Args:
painter (QtGui.QPainter): painter used for drawing the item.
option (QtGui.QStyleOptionGraphicsItem):
used to describe the parameters needed to draw.
widget (QtWidgets.QWidget): not used.
"""
color = QtGui.QColor(*self._color)
pen_style = PIPE_STYLES.get(self.style)
pen_width = PIPE_WIDTH
if self._active:
color = QtGui.QColor(*PIPE_ACTIVE_COLOR)
elif self._highlight:
color = QtGui.QColor(*PIPE_HIGHLIGHT_COLOR)
pen_style = PIPE_STYLES.get(PIPE_STYLE_DEFAULT)
if self.disabled():
color.setAlpha(200)
pen_width += 0.2
pen_style = PIPE_STYLES.get(PIPE_STYLE_DOTTED)
pen = QtGui.QPen(color, pen_width)
pen.setStyle(pen_style)
pen.setCapStyle(QtCore.Qt.RoundCap)
painter.save()
painter.setPen(pen)
painter.setRenderHint(painter.Antialiasing, True)
painter.drawPath(self.path())
painter.restore(
) # QPaintDevice: Cannot destroy paint device that is being painted
def paint(self, painter, option, widget):
"""
Draws the node base not the ports.
Args:
painter (QtGui.QPainter): painter used for drawing the item.
option (QtGui.QStyleOptionGraphicsItem):
used to describe the parameters needed to draw.
widget (QtWidgets.QWidget): not used.
"""
painter.save()
bg_border = 1.0
rect = QtCore.QRectF(0.5 - (bg_border / 2),
0.5 - (bg_border / 2),
self._width + bg_border,
self._height + bg_border)
radius = 2
border_color = QtGui.QColor(*self.border_color)
path = QtGui.QPainterPath()
path.addRoundedRect(rect, radius, radius)
rect = self.boundingRect()
bg_color = QtGui.QColor(*self.color)
painter.setBrush(bg_color)
painter.setPen(QtCore.Qt.NoPen)
painter.drawRoundedRect(rect, radius, radius)
if self.selected and NODE_SEL_COLOR:
painter.setBrush(QtGui.QColor(*NODE_SEL_COLOR))
painter.drawRoundedRect(rect, radius, radius)
label_rect = QtCore.QRectF(rect.left() + (radius / 2),
rect.top() + (radius / 2),
self._width - (radius / 1.25),
28)
path = QtGui.QPainterPath()
path.addRoundedRect(label_rect, radius / 1.5, radius / 1.5)
painter.setBrush(QtGui.QColor(0, 0, 0, 50))
painter.fillPath(path, painter.brush())
border_width = 0.8
if self.selected and NODE_SEL_BORDER_COLOR:
border_width = 1.2
border_color = QtGui.QColor(*NODE_SEL_BORDER_COLOR)
border_rect = QtCore.QRectF(rect.left() - (border_width / 2),
rect.top() - (border_width / 2),
rect.width() + border_width,
rect.height() + border_width)
pen = QtGui.QPen(border_color, border_width)
pen.setCosmetic(self.viewer().get_zoom() < 0.0)
path = QtGui.QPainterPath()
path.addRoundedRect(border_rect, radius, radius)
painter.setBrush(QtCore.Qt.NoBrush)
painter.setPen(pen)
painter.drawPath(path)
painter.restore()
def paint(self, painter, option, widget):
"""
Draws the backdrop rect.
Args:
painter (QtGui.QPainter): painter used for drawing the item.
option (QtGui.QStyleOptionGraphicsItem):
used to describe the parameters needed to draw.
widget (QtWidgets.QWidget): not used.
"""
painter.save()
rect = self.boundingRect()
color = (self.color[0], self.color[1], self.color[2], 50)
painter.setBrush(QtGui.QColor(*color))
painter.setPen(QtCore.Qt.NoPen)
painter.drawRect(rect)
top_rect = QtCore.QRectF(0.0, 0.0, rect.width(), 20.0)
painter.setBrush(QtGui.QColor(*self.color))
painter.setPen(QtCore.Qt.NoPen)
painter.drawRect(top_rect)
if self.backdrop_text:
painter.setPen(QtGui.QColor(*self.text_color))
txt_rect = QtCore.QRectF(top_rect.x() + 5.0,
top_rect.height() + 2.0,
rect.width() - 5.0, rect.height())
painter.setPen(QtGui.QColor(*self.text_color))
painter.drawText(txt_rect,
QtCore.Qt.AlignLeft | QtCore.Qt.TextWordWrap,
self.backdrop_text)
if self.selected and NODE_SEL_COLOR:
sel_color = [x for x in NODE_SEL_COLOR]
sel_color[-1] = 10
painter.setBrush(QtGui.QColor(*sel_color))
painter.setPen(QtCore.Qt.NoPen)
painter.drawRect(rect)
txt_rect = QtCore.QRectF(top_rect.x(),
top_rect.y() + 1.2, rect.width(),
top_rect.height())
painter.setPen(QtGui.QColor(*self.text_color))
painter.drawText(txt_rect, QtCore.Qt.AlignCenter, self.name)
path = QtGui.QPainterPath()
path.addRect(rect)
border_color = self.color
if self.selected and NODE_SEL_BORDER_COLOR:
border_color = NODE_SEL_BORDER_COLOR
painter.setBrush(QtCore.Qt.NoBrush)
painter.setPen(QtGui.QPen(QtGui.QColor(*border_color), 1))
painter.drawPath(path)
painter.restore()
def paint(self, painter, option, widget):
"""
Draws the slicer pipe.
Args:
painter (QtGui.QPainter): painter used for drawing the item.
option (QtGui.QStyleOptionGraphicsItem):
used to describe the parameters needed to draw.
widget (QtWidgets.QWidget): not used.
"""
color = QtGui.QColor(*PIPE_SLICER_COLOR)
p1 = self.path().pointAtPercent(0)
p2 = self.path().pointAtPercent(1)
size = 6.0
offset = size / 2
painter.save()
painter.setRenderHint(painter.Antialiasing, True)
font = painter.font()
font.setPointSize(12)
painter.setFont(font)
text = 'slice'
text_x = painter.fontMetrics().width(text) / 2
text_y = painter.fontMetrics().height() / 1.5
text_pos = QtCore.QPointF(p1.x() - text_x, p1.y() - text_y)
text_color = QtGui.QColor(*PIPE_SLICER_COLOR)
text_color.setAlpha(80)
painter.setPen(QtGui.QPen(text_color, 1.5, QtCore.Qt.SolidLine))
painter.drawText(text_pos, text)
painter.setPen(QtGui.QPen(color, 1.5, QtCore.Qt.DashLine))
painter.drawPath(self.path())
painter.setPen(QtGui.QPen(color, 1.5, QtCore.Qt.SolidLine))
painter.setBrush(color)
rect = QtCore.QRectF(p1.x() - offset, p1.y() - offset, size, size)
painter.drawEllipse(rect)
rect = QtCore.QRectF(p2.x() - offset, p2.y() - offset, size, size)
painter.drawEllipse(rect)
painter.restore()
def paint(self, painter, option, widget):
"""
Draws the circular port.
Args:
painter (QtGui.QPainter): painter used for drawing the item.
option (QtGui.QStyleOptionGraphicsItem):
used to describe the parameters needed to draw.
widget (QtWidgets.QWidget): not used.
"""
painter.save()
rect = QtCore.QRectF(0.0, 0.8, self._width, self._height)
path = QtGui.QPainterPath()
path.addEllipse(rect)
if self._hovered:
color = QtGui.QColor(*PORT_HOVER_COLOR)
border_color = QtGui.QColor(*PORT_HOVER_BORDER_COLOR)
elif self.connected_pipes:
color = QtGui.QColor(*PORT_ACTIVE_COLOR)
border_color = QtGui.QColor(*PORT_ACTIVE_BORDER_COLOR)
else:
color = QtGui.QColor(*self.color)
border_color = QtGui.QColor(*self.border_color)
painter.setBrush(color)
pen = QtGui.QPen(border_color, 1.5)
painter.setPen(pen)
painter.drawEllipse(self.boundingRect())
if self.connected_pipes and not self._hovered:
painter.setBrush(border_color)
w = self._width / 2.5
h = self._height / 2.5
rect = QtCore.QRectF(self.boundingRect().center().x() - w / 2,
self.boundingRect().center().y() - h / 2, w,
h)
painter.drawEllipse(rect)
elif self._hovered:
if self.multi_connection:
painter.setBrush(color)
w = self._width / 1.8
h = self._height / 1.8
else:
painter.setBrush(border_color)
w = self._width / 3.5
h = self._height / 3.5
rect = QtCore.QRectF(self.boundingRect().center().x() - w / 2,
self.boundingRect().center().y() - h / 2, w,
h)
painter.drawEllipse(rect)
painter.restore()
def draw_triangle_port(painter, rect, info):
"""
Custom paint function for drawing a Triangle shaped port.
Args:
painter (QtGui.QPainter): painter object.
rect (QtCore.QRectF): port rect used to describe parameters
needed to draw.
info (dict): information describing the ports current state.
{
'port_type': 'in',
'color': (0, 0, 0),
'border_color': (255, 255, 255),
'multi_connection': False,
'connected': False,
'hovered': False,
}
"""
painter.save()
size = int(rect.height() / 2)
triangle = QtGui.QPolygonF()
triangle.append(QtCore.QPointF(-size, size))
triangle.append(QtCore.QPointF(0.0, -size))
triangle.append(QtCore.QPointF(size, size))
transform = QtGui.QTransform()
transform.translate(rect.center().x(), rect.center().y())
port_poly = transform.map(triangle)
# mouse over port color.
if info['hovered']:
color = QtGui.QColor(14, 45, 59)
border_color = QtGui.QColor(136, 255, 35)
# port connected color.
elif info['connected']:
color = QtGui.QColor(195, 60, 60)
border_color = QtGui.QColor(200, 130, 70)
# default port color
else:
color = QtGui.QColor(*info['color'])
border_color = QtGui.QColor(*info['border_color'])
pen = QtGui.QPen(border_color, 1.8)
pen.setJoinStyle(QtCore.Qt.MiterJoin)
painter.setPen(pen)
painter.setBrush(color)
painter.drawPolygon(port_poly)
painter.restore()
def draw_square_port(painter, rect, info):
"""
Custom paint function for drawing a Square shaped port.
Args:
painter (QtGui.QPainter): painter object.
rect (QtCore.QRectF): port rect used to describe parameters
needed to draw.
info (dict): information describing the ports current state.
{
'port_type': 'in',
'color': (0, 0, 0),
'border_color': (255, 255, 255),
'multi_connection': False,
'connected': False,
'hovered': False,
}
"""
painter.save()
# mouse over port color.
if info['hovered']:
color = QtGui.QColor(14, 45, 59)
border_color = QtGui.QColor(136, 255, 35, 255)
# port connected color.
elif info['connected']:
color = QtGui.QColor(195, 60, 60)
border_color = QtGui.QColor(200, 130, 70)
# default port color
else:
color = QtGui.QColor(*info['color'])
border_color = QtGui.QColor(*info['border_color'])
pen = QtGui.QPen(border_color, 1.8)
pen.setJoinStyle(QtCore.Qt.MiterJoin)
painter.setPen(pen)
painter.setBrush(color)
painter.drawRect(rect)
painter.restore()
def activate(self):
self._active = True
color = QtGui.QColor(*PIPE_ACTIVE_COLOR)
pen = QtGui.QPen(color, 2.5, PIPE_STYLES.get(PIPE_STYLE_DEFAULT))
self.setPen(pen)
def highlight(self):
self._highlight = True
pen = QtGui.QPen(QtGui.QColor(*PIPE_HIGHLIGHT_COLOR), 2)
pen.setStyle(PIPE_STYLES.get(PIPE_STYLE_DEFAULT))
self.setPen(pen)
def activate(self):
self._active = True
pen = QtGui.QPen(QtGui.QColor(*PIPE_ACTIVE_COLOR), 2)
pen.setStyle(PIPE_STYLES.get(PIPE_STYLE_DEFAULT))
self.setPen(pen)
def highlight(self):
self._highlight = True
color = QtGui.QColor(*PIPE_HIGHLIGHT_COLOR)
pen = QtGui.QPen(color, 2, PIPE_STYLES.get(PIPE_STYLE_DEFAULT))
self.setPen(pen)
def reset(self):
self._active = False
self._highlight = False
pen = QtGui.QPen(QtGui.QColor(*self.color), 2)
pen.setStyle(PIPE_STYLES.get(self.style))
self.setPen(pen)
def paint(self, painter, option, widget):
"""
Draws the overlay disabled X item on top of a node item.
Args:
painter (QtGui.QPainter): painter used for drawing the item.
option (QtGui.QStyleOptionGraphicsItem):
used to describe the parameters needed to draw.
widget (QtWidgets.QWidget): not used.
"""
painter.save()
margin = 20
rect = self.boundingRect()
dis_rect = QtCore.QRectF(rect.left() - (margin / 2),
rect.top() - (margin / 2),
rect.width() + margin,
rect.height() + margin)
pen = QtGui.QPen(QtGui.QColor(*self.color), 8)
pen.setCapStyle(QtCore.Qt.RoundCap)
painter.setPen(pen)
painter.drawLine(dis_rect.topLeft(), dis_rect.bottomRight())
painter.drawLine(dis_rect.topRight(), dis_rect.bottomLeft())
bg_color = QtGui.QColor(*self.color)
bg_color.setAlpha(100)
bg_margin = -0.5
bg_rect = QtCore.QRectF(dis_rect.left() - (bg_margin / 2),
dis_rect.top() - (bg_margin / 2),
dis_rect.width() + bg_margin,
dis_rect.height() + bg_margin)
painter.setPen(QtGui.QPen(QtGui.QColor(0, 0, 0, 0)))
painter.setBrush(bg_color)
painter.drawRoundedRect(bg_rect, 5, 5)
pen = QtGui.QPen(QtGui.QColor(155, 0, 0, 255), 0.7)
painter.setPen(pen)
painter.drawLine(dis_rect.topLeft(), dis_rect.bottomRight())
painter.drawLine(dis_rect.topRight(), dis_rect.bottomLeft())
point_size = 4.0
point_pos = (dis_rect.topLeft(), dis_rect.topRight(),
dis_rect.bottomLeft(), dis_rect.bottomRight())
painter.setBrush(QtGui.QColor(255, 0, 0, 255))
for p in point_pos:
p.setX(p.x() - (point_size / 2))
p.setY(p.y() - (point_size / 2))
point_rect = QtCore.QRectF(
p, QtCore.QSizeF(point_size, point_size))
painter.drawEllipse(point_rect)
if self.text:
font = painter.font()
font.setPointSize(10)
painter.setFont(font)
font_metrics = QtGui.QFontMetrics(font)
font_width = font_metrics.width(self.text)
font_height = font_metrics.height()
txt_w = font_width * 1.25
txt_h = font_height * 2.25
text_bg_rect = QtCore.QRectF((rect.width() / 2) - (txt_w / 2),
(rect.height() / 2) - (txt_h / 2),
txt_w, txt_h)
painter.setPen(QtGui.QPen(QtGui.QColor(255, 0, 0), 0.5))
painter.setBrush(QtGui.QColor(*self.color))
painter.drawRoundedRect(text_bg_rect, 2, 2)
text_rect = QtCore.QRectF((rect.width() / 2) - (font_width / 2),
(rect.height() / 2) - (font_height / 2),
txt_w * 2, font_height * 2)
painter.setPen(QtGui.QPen(QtGui.QColor(255, 0, 0), 1))
painter.drawText(text_rect, self.text)
painter.restore()
def paint(self, painter, option, widget):
"""
Draws the circular port.
Args:
painter (QtGui.QPainter): painter used for drawing the item.
option (QtGui.QStyleOptionGraphicsItem):
used to describe the parameters needed to draw.
widget (QtWidgets.QWidget): not used.
"""
painter.save()
### display the falloff colision ###
# pen = QtGui.QPen(QtGui.QColor(255, 255, 255, 80), 0.8)
# pen.setStyle(QtCore.Qt.DotLine)
# painter.setPen(pen)
# painter.drawRect(self.boundingRect())
rect_w = self._width / 1.8
rect_h = self._height / 1.8
rect_x = self.boundingRect().center().x() - (rect_w / 2)
rect_y = self.boundingRect().center().y() - (rect_h / 2)
port_rect = QtCore.QRectF(rect_x, rect_y, rect_w, rect_h)
if self._hovered:
color = QtGui.QColor(*PORT_HOVER_COLOR)
border_color = QtGui.QColor(*PORT_HOVER_BORDER_COLOR)
elif self.connected_pipes:
color = QtGui.QColor(*PORT_ACTIVE_COLOR)
border_color = QtGui.QColor(*PORT_ACTIVE_BORDER_COLOR)
else:
color = QtGui.QColor(*self.color)
border_color = QtGui.QColor(*self.border_color)
painter.setBrush(color)
pen = QtGui.QPen(border_color, 1.8)
painter.setPen(pen)
painter.drawEllipse(port_rect)
if self.connected_pipes and not self._hovered:
painter.setBrush(border_color)
w = port_rect.width() / 2.5
h = port_rect.height() / 2.5
rect = QtCore.QRectF(port_rect.center().x() - w / 2,
port_rect.center().y() - h / 2, w, h)
painter.drawEllipse(rect)
elif self._hovered:
if self.multi_connection:
pen = QtGui.QPen(border_color, 1.4)
painter.setPen(pen)
painter.setBrush(color)
w = port_rect.width() / 1.8
h = port_rect.height() / 1.8
else:
painter.setBrush(border_color)
w = port_rect.width() / 3.5
h = port_rect.height() / 3.5
rect = QtCore.QRectF(port_rect.center().x() - w / 2,
port_rect.center().y() - h / 2, w, h)
painter.drawEllipse(rect)
painter.restore()
def paint(self, painter, option, widget):
"""
Draws the connection line between nodes.
Args:
painter (QtGui.QPainter): painter used for drawing the item.
option (QtGui.QStyleOptionGraphicsItem):
used to describe the parameters needed to draw.
widget (QtWidgets.QWidget): not used.
"""
color = QtGui.QColor(*self._color)
pen_style = PIPE_STYLES.get(self.style)
pen_width = PIPE_WIDTH
if self._active:
color = QtGui.QColor(*PIPE_ACTIVE_COLOR)
if pen_style == QtCore.Qt.DashDotDotLine:
pen_width += 1
else:
pen_width += 0.35
elif self._highlight:
color = QtGui.QColor(*PIPE_HIGHLIGHT_COLOR)
pen_style = PIPE_STYLES.get(PIPE_STYLE_DEFAULT)
if self.disabled():
if not self._active:
color = QtGui.QColor(*PIPE_DISABLED_COLOR)
pen_width += 0.2
pen_style = PIPE_STYLES.get(PIPE_STYLE_DOTTED)
pen = QtGui.QPen(color, pen_width)
pen.setStyle(pen_style)
pen.setCapStyle(QtCore.Qt.RoundCap)
painter.save()
painter.setPen(pen)
painter.setRenderHint(painter.Antialiasing, True)
painter.drawPath(self.path())
# draw arrow
if self.input_port and self.output_port:
cen_x = self.path().pointAtPercent(0.5).x()
cen_y = self.path().pointAtPercent(0.5).y()
loc_pt = self.path().pointAtPercent(0.49)
tgt_pt = self.path().pointAtPercent(0.51)
dist = math.hypot(tgt_pt.x() - cen_x, tgt_pt.y() - cen_y)
if dist < 0.5:
painter.restore()
return
color.setAlpha(255)
if self._highlight:
painter.setBrush(QtGui.QBrush(color.lighter(150)))
elif self._active or self.disabled():
painter.setBrush(QtGui.QBrush(color.darker(200)))
else:
painter.setBrush(QtGui.QBrush(color.darker(130)))
pen_width = 0.6
if dist < 1.0:
pen_width *= (1.0 + dist)
painter.setPen(QtGui.QPen(color, pen_width))
transform = QtGui.QTransform()
transform.translate(cen_x, cen_y)
radians = math.atan2(tgt_pt.y() - loc_pt.y(),
tgt_pt.x() - loc_pt.x())
degrees = math.degrees(radians) - 90
transform.rotate(degrees)
if dist < 1.0:
transform.scale(dist, dist)
painter.drawPolygon(transform.map(self._arrow))
painter.restore() # QPaintDevice: Cannot destroy paint device that is being painted
def paint(self, painter, option, widget):
"""
Draws the connection line.
Args:
painter (QtGui.QPainter): painter used for drawing the item.
option (QtGui.QStyleOptionGraphicsItem):
used to describe the parameters needed to draw.
widget (QtWidgets.QWidget): not used.
"""
color = QtGui.QColor(*PIPE_ACTIVE_COLOR)
pen_style = PIPE_STYLES.get(PIPE_STYLE_DASHED)
pen_width = PIPE_WIDTH + 0.35
pen = QtGui.QPen(color, pen_width)
pen.setStyle(pen_style)
pen.setCapStyle(QtCore.Qt.RoundCap)
painter.save()
painter.setPen(pen)
painter.setRenderHint(painter.Antialiasing, True)
painter.drawPath(self.path())
cen_x = self.path().pointAtPercent(0.5).x()
cen_y = self.path().pointAtPercent(0.5).y()
loc_pt = self.path().pointAtPercent(0.9)
tgt_pt = self.path().pointAtPercent(1.0)
dist = math.hypot(tgt_pt.x() - cen_x, tgt_pt.y() - cen_y)
if dist < 0.05:
painter.restore()
return
# draw circle
size = 10.0
if dist < 50.0:
size *= (dist / 50.0)
rect = QtCore.QRectF(cen_x-(size/2), cen_y-(size/2), size, size)
painter.setBrush(color)
painter.setPen(QtGui.QPen(color.darker(130), pen_width))
painter.drawEllipse(rect)
# draw arrow
color.setAlpha(255)
painter.setBrush(color.darker(200))
pen_width = 0.6
if dist < 1.0:
pen_width *= 1.0 + dist
painter.setPen(QtGui.QPen(color, pen_width))
transform = QtGui.QTransform()
transform.translate(tgt_pt.x(), tgt_pt.y())
radians = math.atan2(tgt_pt.y() - loc_pt.y(),
tgt_pt.x() - loc_pt.x())
degrees = math.degrees(radians) + 90
transform.rotate(degrees)
scale = 1.0
if dist < 20.0:
scale = dist / 20.0
transform.scale(scale, scale)
painter.drawPolygon(transform.map(self._arrow))
painter.restore()
def reset(self):
self._active = False
self._highlight = False
color = QtGui.QColor(*self.color)
pen = QtGui.QPen(color, 2, PIPE_STYLES.get(self.style))
self.setPen(pen)