def paintEvent(self, event):
"""Using a QPainter under 'self',
so just change QPen or QBrush before painting.
"""
self.painter = QPainter()
self.painter.begin(self)
self.painter.fillRect(event.rect(), QBrush(Qt.white))
self.painter.translate(self.ox, self.oy)
#Draw origin lines.
pen = QPen(Qt.gray)
pen.setWidth(1)
self.painter.setPen(pen)
x_l = -self.ox
x_r = self.width()-self.ox
self.painter.drawLine(QPointF(x_l, 0), QPointF(x_r, 0))
y_t = self.height()-self.oy
y_b = -self.oy
self.painter.drawLine(QPointF(0, y_b), QPointF(0, y_t))
#Draw tick.
Indexing = lambda v: int(v/self.zoom - (v/self.zoom)%5)
for x in range(Indexing(x_l), Indexing(x_r)+1, 5):
self.painter.drawLine(
QPointF(x*self.zoom, 0),
QPointF(x*self.zoom, -10 if x%10==0 else -5)
)
for y in range(Indexing(y_b), Indexing(y_t)+1, 5):
self.painter.drawLine(
QPointF(0, y*self.zoom),
QPointF(10 if y%10==0 else 5, y*self.zoom)
)
"""Please to call the "end" method when ending paint event.
def drawSolution(
self,
func: str,
args: Sequence[str],
target: str,
pos: Union[Tuple[VPoint, ...], Dict[int, Tuple[float, float]]]
):
"""Draw the solution triangle."""
points, color = self.solutionPolygon(func, args, target, pos)
color.setAlpha(150)
pen = QPen(color)
pen.setWidth(self.joint_size)
self.painter.setPen(pen)
def draw_arrow(index: int, text: str):
"""Draw arrow."""
self.__draw_arrow(
points[-1].x(),
points[-1].y(),
points[index].x(),
points[index].y(),
text=text
)
draw_arrow(0, args[1])
if func == 'PLLP':
draw_arrow(1, args[2])
color.setAlpha(30)
self.painter.setBrush(QBrush(color))
self.painter.drawPolygon(QPolygonF(points))
self.painter.setBrush(Qt.NoBrush)
def draw_point(self, i: int, cx, cy, fix: bool, color: Tuple[int, int,
int]):
"""Draw a joint."""
pen = QPen(Qt.black if self.monochrome else QColor(*color))
pen.setWidth(2)
self.painter.setPen(pen)
x = cx * self.zoom
y = cy * -self.zoom
if fix:
bottom = y + 20
width = 10
# Draw a triangle below.
self.painter.drawPolygon(QPointF(x, y), QPointF(x - width, bottom),
QPointF(x + width, bottom))
r = self.joint_size * 2
else:
r = self.joint_size
self.painter.drawEllipse(QPointF(x, y), r, r)
if not self.show_point_mark:
return
pen.setColor(Qt.darkGray)
pen.setWidth(2)
self.painter.setPen(pen)
text = f"[{i}]" if type(i) is str else f"[Point{i}]"
if self.show_dimension:
text += f":({cx:.02f}, {cy:.02f})"
self.painter.drawText(QPointF(x, y) + QPointF(6, -6), text)
def __drawSlvsRanges(self):
"""Draw solving range."""
pen = QPen()
self.painter.setFont(QFont("Arial", self.fontSize + 5))
pen.setWidth(5)
for i, (tag, rect) in enumerate(self.ranges.items()):
range_color = QColor(colorNum(i + 1))
range_color.setAlpha(30)
self.painter.setBrush(range_color)
range_color.setAlpha(255)
pen.setColor(range_color)
self.painter.setPen(pen)
cx = rect.x() * self.zoom
cy = rect.y() * -self.zoom
if rect.width():
self.painter.drawRect(
QRectF(cx, cy,
rect.width() * self.zoom,
rect.height() * self.zoom))
else:
self.painter.drawEllipse(QPointF(cx, cy), 3, 3)
range_color.setAlpha(255)
pen.setColor(range_color)
self.painter.setPen(pen)
self.painter.drawText(QPointF(cx + 6, cy - 6), tag)
self.painter.setBrush(Qt.NoBrush)
def drawPoint(self,
i: int,
cx,
cy,
fix: bool,
color: QColor
):
"""Draw a joint."""
pen = QPen(color)
pen.setWidth(2)
self.painter.setPen(pen)
x = cx*self.zoom
y = cy*-self.zoom
if fix:
bottom = y + 20
width = 10
#Draw a triangle below.
self.painter.drawPolygon(
QPointF(x, y),
QPointF(x - width, bottom),
QPointF(x + width, bottom)
)
self.painter.drawEllipse(QPointF(x, y), width, width)
else:
self.painter.drawEllipse(QPointF(x, y), 5, 5)
if not self.showPointMark:
return
pen.setColor(Qt.darkGray)
pen.setWidth(2)
self.painter.setPen(pen)
self.painter.setFont(QFont("Arial", self.fontSize))
text = "[{}]".format(i) if type(i)==str else "[Point{}]".format(i)
if self.showDimension:
text += ":({:.02f}, {:.02f})".format(cx, cy)
self.painter.drawText(QPointF(x+6, y-6), text)
def __drawLink(self, vlink: VLink):
"""Draw a link."""
points = []
for i in vlink.points:
vpoint = self.Points[i]
if vpoint.type == 1 or vpoint.type == 2:
coordinate = vpoint.c[0 if
(vlink.name == vpoint.links[0]) else 1]
x = coordinate[0] * self.zoom
y = coordinate[1] * -self.zoom
else:
x = vpoint.cx * self.zoom
y = vpoint.cy * -self.zoom
points.append((x, y))
pen = QPen(vlink.color)
pen.setWidth(self.linkWidth)
self.painter.setPen(pen)
brush = QColor(226, 219, 190)
brush.setAlphaF(self.transparency)
self.painter.setBrush(brush)
#Rearrange: Put the nearest point to the next position.
qpoints = convex_hull(points)
if qpoints:
self.painter.drawPolygon(*qpoints)
self.painter.setBrush(Qt.NoBrush)
if ((not self.showPointMark) or (vlink.name == 'ground')
or (not qpoints)):
return
pen.setColor(Qt.darkGray)
self.painter.setPen(pen)
cenX = sum(p[0] for p in points) / len(points)
cenY = sum(p[1] for p in points) / len(points)
self.painter.drawText(QPointF(cenX, cenY), '[{}]'.format(vlink.name))
def drawLink(self, name: str, points: Tuple[int]):
"""Draw linkage function.
The link color will be the default color.
"""
color = colorQt('Blue')
pen = QPen(color)
pen.setWidth(self.linkWidth)
self.painter.setPen(pen)
brush = QColor(226, 219, 190)
brush.setAlphaF(0.70)
self.painter.setBrush(brush)
qpoints = tuple(
QPointF(self.Point[i][0] * self.zoom, self.Point[i][1] *
-self.zoom) for i in points
if self.Point[i] and not isnan(self.Point[i][0]))
if len(qpoints) == len(points):
self.painter.drawPolygon(*qpoints)
self.painter.setBrush(Qt.NoBrush)
if self.showPointMark and name != 'ground' and qpoints:
pen.setColor(Qt.darkGray)
self.painter.setPen(pen)
self.painter.setFont(QFont('Arial', self.fontSize))
text = "[{}]".format(name)
cenX = sum(self.Point[i][0] for i in points if self.Point[i])
cenY = sum(self.Point[i][1] for i in points if self.Point[i])
cenX *= self.zoom / len(points)
cenY *= -self.zoom / len(points)
self.painter.drawText(QPointF(cenX, cenY), text)
def __drawPath(self):
"""Draw paths. Recording first."""
pen = QPen()
if self.autoPathShow and self.rightInput():
"""Replace to auto preview path."""
exprs = self.getTriangle(self.Points)
self.Path.path = expr_path(
exprs, {n: 'P{}'.format(n)
for n in range(len(self.Points))}, self.Points,
self.pathInterval())
if self.solutionShow:
for expr in exprs:
self._BaseCanvas__drawSolution(expr[0], expr[1:-1],
expr[-1], self.Points)
if hasattr(self, 'path_record'):
paths = self.path_record
else:
paths = self.Path.path
for i, path in enumerate(paths):
if ((self.Path.show != i) and (self.Path.show != -1)
or (len(path) <= 1)):
continue
try:
color = self.Points[i].color
except:
color = colorQt('Green')
pen.setColor(color)
pen.setWidth(self.pathWidth)
self.painter.setPen(pen)
if self.Path.curve:
self._BaseCanvas__drawCurve(path)
else:
self._BaseCanvas__drawDot(path)
def __draw_path(self):
"""Draw paths. Recording first."""
paths = self.path_record or self.path.path or self.path_preview
if len(self.vpoints) != len(paths):
return
if paths is self.path_preview:
o_path = chain(enumerate(self.path_preview),
self.slider_path_preview.items())
else:
o_path = enumerate(paths)
pen = QPen()
for i, path in o_path:
if self.path.show != i and self.path.show != -1:
continue
if self.monochrome:
color = Qt.gray
elif self.vpoints[i].color is None:
color = color_qt('Green')
else:
color = QColor(*self.vpoints[i].color)
pen.setColor(color)
pen.setWidth(self.path_width)
self.painter.setPen(pen)
if self.path.curve:
self.draw_curve(path)
else:
self.draw_dot(path)
def __draw_link(self, name: str, points: List[int]):
"""Draw link function.
The link color will be the default color.
"""
color = color_qt('Blue')
pen = QPen(color)
pen.setWidth(self.link_width)
self.painter.setPen(pen)
brush = QColor(226, 219, 190)
brush.setAlphaF(0.70)
self.painter.setBrush(brush)
qpoints = tuple(
QPointF(self.pos[i][0], -self.pos[i][1]) * self.zoom
for i in points if self.pos[i] and (not isnan(self.pos[i][0]))
)
if len(qpoints) == len(points):
self.painter.drawPolygon(*qpoints)
self.painter.setBrush(Qt.NoBrush)
if self.show_point_mark and (name != 'ground') and qpoints:
pen.setColor(Qt.darkGray)
self.painter.setPen(pen)
self.painter.setFont(QFont('Arial', self.font_size))
text = f"[{name}]"
cen_x = sum(self.pos[i][0] for i in points if self.pos[i])
cen_y = sum(self.pos[i][1] for i in points if self.pos[i])
self.painter.drawText(QPointF(cen_x, -cen_y) * self.zoom / len(points), text)
def drawSolution(self, func: str, args: Tuple[str], target: str):
"""Draw the solution triangle."""
params = [args[0], args[-1]]
params.append(target)
if func == 'PLLP':
color = QColor(121, 171, 252)
else:
color = QColor(249, 84, 216)
color.setAlpha(255)
pen = QPen()
pen.setColor(color)
pen.setWidth(self.r)
self.painter.setPen(pen)
for n in (0, 1):
x, y = self.pos[int(params[-1].replace('P', ''))]
x2, y2 = self.pos[int(params[n].replace('P', ''))]
self.drawArrow(
x*self.zoom, y*-self.zoom, x2*self.zoom, y2*-self.zoom
)
color.setAlpha(30)
self.painter.setBrush(QBrush(color))
qpoints = []
for name in params:
x, y = self.pos[int(name.replace('P', ''))]
qpoints.append(QPointF(x*self.zoom, y*-self.zoom))
self.painter.drawPolygon(*qpoints)
def __draw_path(self):
"""Draw paths. Recording first."""
paths = self.path_record or self.Path.path or self.pathpreview
if len(self.vpoints) != len(paths):
return
if paths == self.pathpreview:
o_path = chain(enumerate(self.pathpreview),
self.sliderpathpreview.items())
else:
o_path = enumerate(paths)
pen = QPen()
for i, path in o_path:
if (self.Path.show != i) and (self.Path.show != -1):
continue
if self.vpoints[i].color:
color = self.vpoints[i].color
else:
color = color_qt('Green')
pen.setColor(color)
pen.setWidth(self.path_width)
self.painter.setPen(pen)
if self.Path.curve:
self.drawCurve(path)
else:
self.drawDot(path)
def drawTargetPath(self):
"""Draw solving path."""
pen = QPen()
pen.setWidth(self.pathWidth)
for i, name in enumerate(sorted(self.targetPath)):
path = self.targetPath[name]
Pen, Dot, Brush = colorPath(i)
pen.setColor(Pen)
self.painter.setPen(pen)
self.painter.setBrush(Brush)
if len(path)>1:
pointPath = QPainterPath()
for i, (x, y) in enumerate(path):
x *= self.zoom
y *= -self.zoom
self.painter.drawEllipse(QPointF(x, y), 4, 4)
if i==0:
self.painter.drawText(QPointF(x+6, y-6), name)
pointPath.moveTo(x, y)
else:
x2, y2 = path[i-1]
self.drawArrow(x, y, x2*self.zoom, y2*-self.zoom)
pointPath.lineTo(QPointF(x, y))
self.painter.drawPath(pointPath)
for x, y in path:
pen.setColor(Dot)
self.painter.setPen(pen)
self.painter.drawEllipse(
QPointF(x*self.zoom, y*-self.zoom), 3, 3
)
elif len(path)==1:
x = path[0][0]*self.zoom
y = path[0][1]*-self.zoom
self.painter.drawText(QPointF(x+6, y-6), name)
pen.setColor(Dot)
self.painter.setPen(pen)
self.painter.drawEllipse(QPointF(x, y), 3, 3)
self.painter.setBrush(Qt.NoBrush)
def graph(G: Graph,
width: int,
engine: [str, Dict[int, Tuple[float, float]]],
node_mode: bool = False,
except_node: int = None) -> QIcon:
"""Draw a linkage graph."""
try:
pos = engine_picker(G, engine, node_mode)
except EngineError as e:
raise e
width_ = -inf
for x, y in pos.values():
if abs(x) > width_:
width_ = x
if abs(y) > width_:
width_ = y
width_ *= 2 * 1.2
image = QImage(QSize(width_, width_), QImage.Format_ARGB32_Premultiplied)
image.fill(Qt.transparent)
painter = QPainter(image)
painter.translate(image.width() / 2, image.height() / 2)
pen = QPen()
r = width_ / 50
pen.setWidth(r)
painter.setPen(pen)
if node_mode:
for l1, l2 in G.edges:
painter.drawLine(QPointF(pos[l1][0], -pos[l1][1]),
QPointF(pos[l2][0], -pos[l2][1]))
else:
painter.setBrush(QBrush(QColor(226, 219, 190, 150)))
for link in G.nodes:
if link == except_node:
continue
#Distance sorted function from canvas
painter.drawPolygon(*convex_hull([(pos[n][0], -pos[n][1])
for n, edge in edges_view(G)
if link in edge]))
for k, (x, y) in pos.items():
if node_mode:
color = colorNum(len(list(G.neighbors(k))) - 1)
else:
if except_node in tuple(G.edges)[k]:
color = colorQt('Green')
else:
color = colorQt('Blue')
pen.setColor(color)
painter.setPen(pen)
painter.setBrush(QBrush(color))
painter.drawEllipse(QPointF(x, -y), r, r)
painter.end()
icon = QIcon(QPixmap.fromImage(image).scaledToWidth(width))
return icon
def paintEvent(self, event):
"""Using a QPainter under 'self',
so just change QPen or QBrush before painting.
"""
self.painter.begin(self)
self.painter.fillRect(event.rect(), QBrush(Qt.white))
# Translation
self.painter.translate(self.ox, self.oy)
# Background
if not self.background.isNull():
rect = self.background.rect()
self.painter.setOpacity(self.background_opacity)
img_origin: QPointF = self.background_offset * self.zoom
self.painter.drawImage(
QRectF(img_origin, QSizeF(
rect.width() * self.background_scale * self.zoom,
rect.height() * self.background_scale * self.zoom
)),
self.background,
QRectF(rect)
)
self.painter.setOpacity(1)
# Show frame.
pen = QPen(Qt.blue)
pen.setWidth(1)
self.painter.setPen(pen)
self.painter.setFont(QFont("Arial", self.font_size))
# Draw origin lines.
pen.setColor(Qt.gray)
self.painter.setPen(pen)
x_l = -self.ox
x_r = self.width() - self.ox
self.painter.drawLine(QPointF(x_l, 0), QPointF(x_r, 0))
y_t = self.height() - self.oy
y_b = -self.oy
self.painter.drawLine(QPointF(0, y_b), QPointF(0, y_t))
def indexing(v):
"""Draw tick."""
return int(v / self.zoom - v / self.zoom % 5)
for x in range(indexing(x_l), indexing(x_r) + 1, 5):
self.painter.drawLine(
QPointF(x, 0) * self.zoom,
QPointF(x * self.zoom, -10 if x % 10 == 0 else -5)
)
for y in range(indexing(y_b), indexing(y_t) + 1, 5):
self.painter.drawLine(
QPointF(0, y) * self.zoom,
QPointF(10 if y % 10 == 0 else 5, y * self.zoom)
)
def __draw_path(self):
"""Draw a path.
A simple function than main canvas.
"""
pen = QPen()
for i, path in enumerate(self.path.path):
color = color_qt('Green')
if f"P{i}" in self.target_path:
color = color_qt('Dark-Orange')
pen.setColor(color)
pen.setWidth(self.path_width)
self.painter.setPen(pen)
self.draw_curve(path)
def __draw_path(self):
"""Draw a path.
A simple function than main canvas.
"""
pen = QPen()
for i, path in enumerate(self.Path.path):
color = color_qt('Green')
if self.exp_symbol[i] in self.mechanism['Target']:
color = color_qt('Dark-Orange')
pen.setColor(color)
pen.setWidth(self.path_width)
self.painter.setPen(pen)
self.drawCurve(path)
def draw_slvs_ranges(self):
"""Draw solving range."""
pen = QPen()
pen.setWidth(5)
for i, (tag, rect) in enumerate(self.ranges.items()):
range_color = QColor(color_num(i + 1))
range_color.setAlpha(30)
self.painter.setBrush(range_color)
range_color.setAlpha(255)
pen.setColor(range_color)
self.painter.setPen(pen)
cx = rect.x() * self.zoom
cy = rect.y() * -self.zoom
if rect.width():
self.painter.drawRect(
QRectF(QPointF(cx, cy),
QSizeF(rect.width(), rect.height()) * self.zoom))
else:
self.painter.drawEllipse(QPointF(cx, cy), 3, 3)
range_color.setAlpha(255)
pen.setColor(range_color)
self.painter.setPen(pen)
self.painter.drawText(QPointF(cx, cy) + QPointF(6, -6), tag)
self.painter.setBrush(Qt.NoBrush)
def __drawSolution(self, func: str, args: Tuple[str], target: str,
pos: TypeVar('Coords', Tuple[VPoint],
Dict[int, Tuple[float, float]])):
"""Draw the solution triangle."""
if func == 'PLLP':
color = QColor(121, 171, 252)
params = [args[0], args[-1]]
elif func == 'PLAP':
color = QColor(249, 84, 216)
params = [args[0]]
elif func == 'PLPP':
color = QColor(94, 255, 185)
params = [args[0]]
params.append(target)
pen = QPen()
pen.setColor(color)
pen.setWidth(RADIUS)
self.painter.setPen(pen)
def drawArrow(n: int) -> bool:
"""Draw arrow and return True if done."""
try:
x, y = pos[int(params[-1].replace('P', ''))]
x2, y2 = pos[int(params[n].replace('P', ''))]
except ValueError:
return False
else:
self.__drawArrow(x * self.zoom, y * -self.zoom, x2 * self.zoom,
y2 * -self.zoom)
return True
if not drawArrow(0):
return
if func == 'PLLP':
if not drawArrow(1):
return
color.setAlpha(30)
self.painter.setBrush(QBrush(color))
qpoints = []
for name in params:
x, y = pos[int(name.replace('P', ''))]
qpoints.append(QPointF(x * self.zoom, y * -self.zoom))
self.painter.drawPolygon(*qpoints)
self.painter.setBrush(Qt.NoBrush)
def drawPath(self):
"""Draw paths. Recording first."""
pen = QPen()
if hasattr(self, 'PathRecord'):
Path = self.PathRecord
else:
Path = self.Path.path
for i, path in enumerate(Path):
if self.Path.show != i and self.Path.show != -1:
continue
if len(set(path)) > 1:
try:
color = self.Point[i].color
except:
color = colorQt('Green')
pen.setColor(color)
pen.setWidth(self.pathWidth)
self.painter.setPen(pen)
if self.Path.curve:
self.drawCurve(path)
else:
self.drawDot(path)
def to_graph(graph: Graph,
width: int,
engine: Union[str, Dict[int, Tuple[float, float]]],
node_mode: bool = False,
except_node: int = None) -> QIcon:
"""Draw a generalized chain graph."""
pos: Pos = engine_picker(graph, engine, node_mode)
width_bound = -float('inf')
for x, y in pos.values():
if abs(x) > width_bound:
width_bound = x
if abs(y) > width_bound:
width_bound = y
width_bound *= 2.2
image = QImage(QSize(int(width_bound), int(width_bound)),
QImage.Format_ARGB32_Premultiplied)
image.fill(Qt.transparent)
painter = QPainter(image)
painter.translate(image.width() / 2, image.height() / 2)
pen = QPen()
r = width_bound / 50
pen.setWidth(int(r))
painter.setPen(pen)
# Draw edges.
if node_mode:
for l1, l2 in graph.edges:
if except_node in {l1, l2}:
pen.setColor(color_qt('Gray'))
else:
pen.setColor(color_qt('Black'))
painter.setPen(pen)
painter.drawLine(QPointF(pos[l1][0], -pos[l1][1]),
QPointF(pos[l2][0], -pos[l2][1]))
else:
painter.setBrush(QBrush(QColor(226, 219, 190, 150)))
for link in graph.nodes:
if link == except_node:
pen.setColor(color_qt('Gray'))
else:
pen.setColor(color_qt('Black'))
painter.setPen(pen)
painter.drawPolygon(*convex_hull([(pos[n][0], -pos[n][1])
for n, edge in edges_view(graph)
if link in edge],
as_qpoint=True))
# Draw nodes.
for k, (x, y) in pos.items():
if node_mode:
color = color_num(len(list(graph.neighbors(k))) - 1)
if k == except_node:
color.setAlpha(150)
else:
if except_node in dict(edges_view(graph))[k]:
color = color_qt('Green')
else:
color = color_qt('Blue')
pen.setColor(color)
painter.setPen(pen)
painter.setBrush(QBrush(color))
painter.drawEllipse(QPointF(x, -y), r, r)
painter.end()
icon = QIcon(QPixmap.fromImage(image).scaledToWidth(width))
return icon
def __draw_point(self, i: int, vpoint: VPoint):
"""Draw a point."""
if vpoint.type in {VJoint.P, VJoint.RP}:
pen = QPen(QColor(*vpoint.color))
pen.setWidth(2)
# Draw slot point and pin point.
for j, (cx, cy) in enumerate(vpoint.c):
if not vpoint.links:
grounded = False
else:
grounded = vpoint.links[j] == 'ground'
# Slot point.
if j == 0 or vpoint.type == VJoint.P:
pen.setColor(Qt.black if self.monochrome else QColor(
*vpoint.color))
self.painter.setPen(pen)
cp = QPointF(cx, -cy) * self.zoom
jr = self.joint_size * (2 if j == 0 else 1)
rp = QPointF(jr, -jr)
self.painter.drawRect(QRectF(cp + rp, cp - rp))
if self.show_point_mark:
pen.setColor(Qt.darkGray)
self.painter.setPen(pen)
text = f"[Point{i}]"
if self.show_dimension:
text += f":({cx:.02f}, {cy:.02f})"
self.painter.drawText(cp + rp, text)
else:
self.draw_point(i, cx, cy, grounded, vpoint.color)
# Slider line
pen.setColor(QColor(*vpoint.color).darker())
self.painter.setPen(pen)
qline_m = QLineF(
QPointF(vpoint.c[1][0], -vpoint.c[1][1]) * self.zoom,
QPointF(vpoint.c[0][0], -vpoint.c[0][1]) * self.zoom)
nv = qline_m.normalVector()
nv.setLength(self.joint_size)
nv.setPoints(nv.p2(), nv.p1())
qline_1 = nv.normalVector()
qline_1.setLength(qline_m.length())
self.painter.drawLine(qline_1)
nv.setLength(nv.length() * 2)
nv.setPoints(nv.p2(), nv.p1())
qline_2 = nv.normalVector()
qline_2.setLength(qline_m.length())
qline_2.setAngle(qline_2.angle() + 180)
self.painter.drawLine(qline_2)
else:
self.draw_point(i, vpoint.cx, vpoint.cy, vpoint.grounded(),
vpoint.color)
# For selects function.
if self.select_mode == SelectMode.Joint and (i in self.selections):
pen = QPen(QColor(161, 16, 239))
pen.setWidth(3)
self.painter.setPen(pen)
self.painter.drawRect(vpoint.cx * self.zoom - 12,
vpoint.cy * -self.zoom - 12, 24, 24)
def __draw_link(self, vlink: VLink):
"""Draw a link."""
if vlink.name == 'ground' or (not vlink.points):
return
points = self.__points_pos(vlink)
pen = QPen()
# Rearrange: Put the nearest point to the next position.
qpoints = convex_hull(points, as_qpoint=True)
if (self.select_mode == SelectMode.Link
and self.vlinks.index(vlink) in self.selections):
pen.setWidth(self.link_width + 6)
pen.setColor(Qt.black if self.monochrome else QColor(161, 16, 239))
self.painter.setPen(pen)
self.painter.drawPolygon(*qpoints)
pen.setWidth(self.link_width)
pen.setColor(Qt.black if self.monochrome else QColor(*vlink.color))
self.painter.setPen(pen)
brush = QColor(Qt.darkGray) if self.monochrome else QColor(
226, 219, 190)
brush.setAlphaF(self.transparency)
self.painter.setBrush(brush)
self.painter.drawPolygon(*qpoints)
self.painter.setBrush(Qt.NoBrush)
if not self.show_point_mark:
return
pen.setColor(Qt.darkGray)
self.painter.setPen(pen)
p_count = len(points)
cen_x = sum(p[0] for p in points) / p_count
cen_y = sum(p[1] for p in points) / p_count
self.painter.drawText(QRectF(cen_x - 50, cen_y - 50, 100, 100),
Qt.AlignCenter, f'[{vlink.name}]')
def paintEvent(self, event):
"""Drawing functions."""
width = self.width()
height = self.height()
if self.width_old is None:
self.width_old = width
if self.height_old is None:
self.height_old = height
if self.width_old != width or self.height_old != height:
self.ox += (width - self.width_old) / 2
self.oy += (height - self.height_old) / 2
# 'self' is the instance of 'DynamicCanvas'.
BaseCanvas.paintEvent(self, event)
# Draw links except ground.
for vlink in self.vlinks[1:]:
self.__draw_link(vlink)
# Draw path.
if self.path.show != -2:
self.__draw_path()
# Draw solving path.
if self.show_target_path:
self.painter.setFont(QFont("Arial", self.font_size + 5))
self.draw_slvs_ranges()
self.draw_target_path()
self.painter.setFont(QFont("Arial", self.font_size))
# Draw points.
for i, vpoint in enumerate(self.vpoints):
self.__draw_point(i, vpoint)
# Draw solutions.
if self.select_mode == SelectMode.Solution:
for i, expr in enumerate(self.exprs):
func = expr[0]
params = expr[1:-1]
target = expr[-1]
self.draw_solution(func, params, target, self.vpoints)
if i in self.selections:
pos, _ = self.solution_polygon(func, params, target,
self.vpoints)
pen = QPen()
pen.setWidth(self.link_width + 3)
pen.setColor(QColor(161, 16, 239))
self.painter.setPen(pen)
self.painter.drawPolygon(QPolygonF(pos))
# Draw a colored frame for free move mode.
if self.free_move != FreeMode.NoFreeMove:
pen = QPen()
if self.free_move == FreeMode.Translate:
pen.setColor(QColor(161, 16, 229))
elif self.free_move == FreeMode.Rotate:
pen.setColor(QColor(219, 162, 6))
elif self.free_move == FreeMode.Reflect:
pen.setColor(QColor(79, 249, 193))
pen.setWidth(8)
self.painter.setPen(pen)
self.__draw_frame()
# Rectangular selection
if self.selector.picking:
pen = QPen(Qt.gray)
pen.setWidth(1)
self.painter.setPen(pen)
self.painter.drawRect(self.selector.to_rect(self.zoom))
# Show FPS
self.fps_updated.emit()
self.painter.end()
# Record the widget size.
self.width_old = width
self.height_old = height
def __drawPoint(self, i: int, vpoint: VPoint):
"""Draw a point."""
if vpoint.type == 1 or vpoint.type == 2:
#Draw slider
silder_points = vpoint.c
for j, (cx, cy) in enumerate(silder_points):
if vpoint.type == 1:
if j == 0:
self._BaseCanvas__drawPoint(
i, cx, cy, vpoint.links[j] == 'ground',
vpoint.color)
else:
pen = QPen(vpoint.color)
pen.setWidth(2)
self.painter.setPen(pen)
r = 5
self.painter.drawRect(
QRectF(
QPointF(cx * self.zoom + r,
cy * -self.zoom + r),
QPointF(cx * self.zoom - r,
cy * -self.zoom - r)))
elif vpoint.type == 2:
if j == 0:
self._BaseCanvas__drawPoint(
i, cx, cy, vpoint.links[j] == 'ground',
vpoint.color)
else:
#Turn off point mark.
showPointMark = self.showPointMark
self.showPointMark = False
self._BaseCanvas__drawPoint(
i, cx, cy, vpoint.links[j] == 'ground',
vpoint.color)
self.showPointMark = showPointMark
pen = QPen(vpoint.color.darker())
pen.setWidth(2)
self.painter.setPen(pen)
x_all = tuple(cx for cx, cy in silder_points)
if x_all:
p_left = silder_points[x_all.index(min(x_all))]
p_right = silder_points[x_all.index(max(x_all))]
if p_left == p_right:
y_all = tuple(cy for cx, cy in silder_points)
p_left = silder_points[y_all.index(min(y_all))]
p_right = silder_points[y_all.index(max(y_all))]
self.painter.drawLine(
QPointF(p_left[0] * self.zoom, p_left[1] * -self.zoom),
QPointF(p_right[0] * self.zoom, p_right[1] * -self.zoom))
else:
self._BaseCanvas__drawPoint(i, vpoint.cx, vpoint.cy,
vpoint.grounded(), vpoint.color)
#For selects function.
if i in self.pointsSelection:
pen = QPen(QColor(161, 16, 239))
pen.setWidth(3)
self.painter.setPen(pen)
self.painter.drawRect(vpoint.cx * self.zoom - 12,
vpoint.cy * -self.zoom - 12, 24, 24)
def paintEvent(self, event):
"""Drawing functions."""
width = self.width()
height = self.height()
if ((self.width_old is not None) and ((self.width_old != width) or
(self.height_old != height))):
self.ox += (width - self.width_old) / 2
self.oy += (height - self.height_old) / 2
super(DynamicCanvas, self).paintEvent(event)
self.painter.setFont(QFont('Arial', self.fontSize))
if self.freemove != FreeMode.NoFreeMove:
#Draw a colored frame for free move mode.
pen = QPen()
if self.freemove == FreeMode.Translate:
pen.setColor(QColor(161, 105, 229))
elif self.freemove == FreeMode.Rotate:
pen.setColor(QColor(219, 162, 6))
elif self.freemove == FreeMode.Reflect:
pen.setColor(QColor(79, 249, 193))
pen.setWidth(8)
self.painter.setPen(pen)
self.__drawFrame()
#Draw links except ground.
for vlink in self.Links[1:]:
self.__drawLink(vlink)
#Draw path.
if self.Path.show != -2:
self.__drawPath()
#Draw solving path.
if self.showTargetPath:
self.__drawSlvsRanges()
self._BaseCanvas__drawTargetPath()
#Draw points.
for i, vpoint in enumerate(self.Points):
self.__drawPoint(i, vpoint)
#Rectangular selection
if self.Selector.RectangularSelection:
pen = QPen(Qt.gray)
pen.setWidth(1)
self.painter.setPen(pen)
self.painter.drawRect(
QRectF(QPointF(self.Selector.x, self.Selector.y),
QPointF(self.Selector.sx, self.Selector.sy)))
self.painter.end()
#Record the widget size.
self.width_old = width
self.height_old = height
def paintEvent(self, event):
"""Drawing functions."""
width = self.width()
height = self.height()
if self.width_old != width or self.height_old != height:
self.ox += (width - self.width_old) / 2
self.oy += (height - self.height_old) / 2
super(DynamicCanvas, self).paintEvent(event)
self.painter.setFont(QFont('Arial', self.fontSize))
if self.freemove:
#Draw a colored frame for free move mode.
pen = QPen()
if self.freemove == 1:
pen.setColor(QColor(161, 105, 229))
elif self.freemove == 2:
pen.setColor(QColor(219, 162, 6))
elif self.freemove == 3:
pen.setColor(QColor(79, 249, 193))
pen.setWidth(8)
self.painter.setPen(pen)
self.drawFrame()
if self.Selector.RectangularSelection:
pen = QPen(Qt.gray)
pen.setWidth(1)
self.painter.setPen(pen)
self.painter.drawRect(
QRectF(QPointF(self.Selector.x, self.Selector.y),
QPointF(self.Selector.sx, self.Selector.sy)))
#Draw links.
for vlink in self.Link[1:]:
self.drawLink(vlink)
#Draw path.
if self.Path.show > -2:
self.drawPath()
#Draw solving path.
if self.showTargetPath:
self.drawSlvsRanges()
self.drawTargetPath()
#Draw points.
for i, vpoint in enumerate(self.Point):
self.drawPoint(i, vpoint)
self.painter.end()
self.width_old = width
self.height_old = height
def paintEvent(self, event):
"""Draw the structure."""
width = self.width()
height = self.height()
if self.pos:
x_right, x_left, y_top, y_bottom = self.__zoom_to_fit_limit()
x_diff = x_left - x_right
y_diff = y_top - y_bottom
x_diff = x_diff if x_diff else 1
y_diff = y_diff if y_diff else 1
if width / x_diff < height / y_diff:
factor = width / x_diff
else:
factor = height / y_diff
self.zoom = factor * 0.95
self.ox = width / 2 - (x_left + x_right) / 2 * self.zoom
self.oy = height / 2 + (y_top + y_bottom) / 2 * self.zoom
else:
sq_w = 240
self.zoom = (width / sq_w) if (width <= height) else (height / sq_w)
self.ox = width / 2
self.oy = height / 2
super(PreviewCanvas, self).paintEvent(event)
pen = QPen()
pen.setWidth(self.joint_size)
self.painter.setPen(pen)
self.painter.setBrush(QBrush(QColor(226, 219, 190, 150)))
# Links
for link in self.G.nodes:
if link == self.grounded:
continue
points = []
# Points that is belong with the link.
for num, edge in edges_view(self.G):
if link in edge:
if num in self.same:
num = self.same[num]
x, y = self.pos[num]
points.append((x * self.zoom, y * -self.zoom))
# Customize points.
for name, link_ in self.cus.items():
if link == link_:
x, y = self.pos[int(name.replace('P', ''))]
points.append((x * self.zoom, y * -self.zoom))
self.painter.drawPolygon(*convex_hull(points, as_qpoint=True))
# Nodes
for node, (x, y) in self.pos.items():
if node in self.same:
continue
x *= self.zoom
y *= -self.zoom
if node in (self.Driver, self.Target):
if node == self.Driver:
pen.setColor(color_qt('Red'))
elif node == self.Target:
pen.setColor(color_qt('Yellow'))
self.painter.setPen(pen)
self.painter.drawEllipse(QPointF(x, y), self.joint_size, self.joint_size)
if self.getStatus(node):
color = color_qt('Dark-Magenta')
else:
color = color_qt('Green')
pen.setColor(color)
self.painter.setPen(pen)
self.painter.setBrush(QBrush(color))
self.painter.drawEllipse(QPointF(x, y), self.joint_size, self.joint_size)
pen.setColor(color_qt('Black'))
self.painter.setPen(pen)
# Solutions
if self.showSolutions:
solutions = self.get_solutions()
if solutions:
for expr in solutions.split(';'):
self.drawSolution(
io.str_before(expr, '['),
io.str_between(expr, '[', ']').split(','),
io.str_between(expr, '(', ')'),
self.pos
)
# Text of node.
pen.setColor(Qt.black)
self.painter.setPen(pen)
for node, (x, y) in self.pos.items():
if node in self.same:
continue
x *= self.zoom
x += 2 * self.joint_size
y *= -self.zoom
y -= 2 * self.joint_size
self.painter.drawText(QPointF(x, y), f'P{node}')
self.painter.end()
def paintEvent(self, event):
"""Draw the structure."""
width = self.width()
height = self.height()
if self.pos:
x_right, x_left, y_top, y_bottom = self.__zoom_to_fit_limit()
x_diff = x_left - x_right
y_diff = y_top - y_bottom
x_diff = x_diff if x_diff else 1
y_diff = y_diff if y_diff else 1
if width / x_diff < height / y_diff:
factor = width / x_diff
else:
factor = height / y_diff
self.zoom = factor * 0.75
self.ox = width / 2 - (x_left + x_right) / 2 * self.zoom
self.oy = height / 2 + (y_top + y_bottom) / 2 * self.zoom
else:
if width <= height:
self.zoom = width / PreviewCanvas.view_size
else:
self.zoom = height / PreviewCanvas.view_size
self.ox = width / 2
self.oy = height / 2
super(PreviewCanvas, self).paintEvent(event)
pen = QPen()
pen.setWidth(self.joint_size)
self.painter.setPen(pen)
if self.monochrome:
color = QColor(Qt.darkGray)
else:
color = QColor(226, 219, 190)
color.setAlpha(150)
self.painter.setBrush(QBrush(color))
# Links
for link in self.G.nodes:
if link == self.grounded:
continue
points = []
# Points that is belong with the link.
for num, edge in edges_view(self.G):
if link in edge:
if num in self.same:
num = self.same[num]
x, y = self.pos[num]
points.append((x * self.zoom, y * -self.zoom))
# Customize points.
for name, link_ in self.cus.items():
if link == link_:
x, y = self.pos[name]
points.append((x * self.zoom, y * -self.zoom))
self.painter.drawPolygon(*convex_hull(points, as_qpoint=True))
# Nodes
for node, (x, y) in self.pos.items():
if node in self.same:
continue
x *= self.zoom
y *= -self.zoom
if self.monochrome:
color = Qt.black
elif node in self.driver:
color = color_qt('Red')
elif node in self.target:
color = color_qt('Orange')
elif self.get_status(node):
color = color_qt('Green')
else:
color = color_qt('Blue')
pen.setColor(color)
self.painter.setPen(pen)
self.painter.setBrush(QBrush(color))
self.painter.drawEllipse(QPointF(x, y), self.joint_size,
self.joint_size)
pen.setColor(Qt.black)
self.painter.setPen(pen)
# Text of node.
pen.setColor(Qt.black)
self.painter.setPen(pen)
for node, (x, y) in self.pos.items():
if node in self.same:
continue
x *= self.zoom
x += 2 * self.joint_size
y *= -self.zoom
y -= 2 * self.joint_size
self.painter.drawText(QPointF(x, y), f'P{node}')
self.painter.end()
def drawTargetPath(self):
"""Draw solving path."""
pen = QPen()
pen.setWidth(self.path_width)
for i, name in enumerate(sorted(self.target_path)):
path = self.target_path[name]
road, dot, brush = target_path_style(i)
pen.setColor(road)
self.painter.setPen(pen)
self.painter.setBrush(brush)
if len(path) == 1:
x, y = path[0]
p = QPointF(x, -y) * self.zoom
self.painter.drawText(p + QPointF(6, -6), name)
pen.setColor(dot)
self.painter.setPen(pen)
self.painter.drawEllipse(p, self.joint_size, self.joint_size)
else:
painter_path = QPainterPath()
for j, (x, y) in enumerate(path):
p = QPointF(x, -y) * self.zoom
self.painter.drawEllipse(p, self.joint_size, self.joint_size)
if j == 0:
self.painter.drawText(p + QPointF(6, -6), name)
painter_path.moveTo(p)
else:
x2, y2 = path[j - 1]
self.__draw_arrow(x, -y, x2, -y2, zoom=True)
painter_path.lineTo(p)
pen.setColor(road)
self.painter.setPen(pen)
self.painter.drawPath(painter_path)
for x, y in path:
pen.setColor(dot)
self.painter.setPen(pen)
p = QPointF(x, -y) * self.zoom
self.painter.drawEllipse(p, self.joint_size, self.joint_size)
self.painter.setBrush(Qt.NoBrush)