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import math
from typing import TYPE_CHECKING, Optional
from qtpy.QtWidgets import QGraphicsPathItem
from qtpy.QtGui import QPen, QColor, QBrush, QPainter, QPainterPath
from qtpy.QtCore import QPointF, Qt, QRectF
from .init_values import canvas, options, GridStyle
if TYPE_CHECKING:
from .scene_moth import PatchSceneMoth
def x_multiply(path: QPainterPath, n_times: int, width: int) -> QPainterPath:
paths = [path]
while n_times >= 2 ** len(paths):
new_path = paths[-1].translated(0.0, 0.0)
new_path.addPath(
paths[-1].translated(
width * 2 ** (len(paths) -1), 0.0))
paths.append(new_path)
x_done = 2 ** (len(paths) - 1)
x_path = paths[-1]
for i in range(len(paths) - 2, -1, -1):
if 2 ** i <= n_times - x_done:
x_path.addPath(
paths[i].translated(x_done * width, 0.0))
x_done += 2 ** i
return x_path
def y_multiply(path: QPainterPath, n_times: int, height: int) -> QPainterPath:
paths = [path]
while n_times >= 2 ** len(paths):
new_path = paths[-1].translated(0.0, 0.0)
new_path.addPath(
paths[-1].translated(
0.0, height * 2 ** (len(paths) -1)))
paths.append(new_path)
y_done = 2 ** (len(paths) - 1)
y_path = paths[-1]
for i in range(len(paths) - 2, -1, -1):
if 2 ** i <= n_times - y_done:
y_path.addPath(
paths[i].translated(0.0, y_done * height))
y_done += 2 ** i
return y_path
class GridWidget(QGraphicsPathItem):
def __init__(self, scene: 'PatchSceneMoth', style=GridStyle.GRID):
QGraphicsPathItem.__init__(self)
self._scene = scene
self.style = style
self._rects = list[QRectF]()
self.setPath(QPainterPath(QPointF()))
self.left_path: Optional[QPainterPath] = None
self.right_path: Optional[QPainterPath] = None
self.left_path_width = 0.0
self.right_path_width = 0.0
self._pointt = QPointF(0.0, 0.0)
self.global_path = QPainterPath()
self._bounding_rect = QRectF()
self.update_path()
def grid_path(self):
theme = canvas.theme.grid
if self.style is GridStyle.TECHNICAL_GRID:
theme = theme.technical_grid
elif self.style is GridStyle.GRID:
theme = theme.grid
path = QPainterPath()
x_path = QPainterPath()
y_path = QPainterPath()
cell_x = options.cell_width
cell_y = options.cell_height
if self.style is GridStyle.GRID:
cell_x = cell_x * math.ceil(theme.grid_min_width / cell_x)
cell_y = cell_y * math.ceil(theme.grid_min_height / cell_y)
rect = self._scene.sceneRect()
x = rect.left()
x -= x % cell_x
if x < rect.left():
x += cell_x
x_path.moveTo(QPointF(x, rect.top()))
x_path.lineTo(QPointF(x, rect.bottom()))
path.addPath(
x_multiply(
x_path, 1 + math.floor((rect.right() - x) / cell_x), cell_x))
y = rect.top()
y -= y % cell_y
if y < rect.top():
y += cell_y
y_path.moveTo(QPointF(rect.left(), y))
y_path.lineTo(QPointF(rect.right(), y))
path.addPath(
y_multiply(
y_path, 1 + math.floor((rect.bottom() - y) / cell_y), cell_y))
self.setPath(path)
self.setPen(theme.fill_pen)
self.setBrush(QBrush(Qt.BrushStyle.NoBrush))
def update_path(self):
self._bounding_rect = self._scene.sceneRect()
if self.style is GridStyle.CHESSBOARD:
self.chess_board()
else:
self.grid_path()
def chess_board(self):
theme = canvas.theme.grid.chessboard
cell_x = (options.cell_width
* math.ceil(theme.grid_min_width / options.cell_width))
cell_y = (options.cell_height
* math.ceil(theme.grid_min_height / options.cell_height))
path = QPainterPath(QPointF(0.0, 0.0))
rect = self._scene.sceneRect()
x = rect.left()
x -= x % (cell_x * 2)
x += 2 * cell_x
y = rect.top()
y -= y % (cell_y * 2)
y += 2 * cell_y
# make the normal pattern
orig_path = QPainterPath()
orig_path.moveTo(x + cell_x / 2, y)
orig_path.lineTo(x + cell_x / 2, y + cell_y)
orig_path.moveTo(x + cell_x * 1.5, y + cell_y)
orig_path.lineTo(x + cell_x * 1.5, y + 2.0 * cell_y)
total_x = math.floor((rect.right() - x) / (2 * cell_x))
total_y = math.floor((rect.bottom() - y)/ (2 * cell_y))
y_path = orig_path
y_path = y_multiply(orig_path, total_y, 2 * cell_y)
y_down = y + total_y * 2 * cell_y
x_right = x + total_x * 2 * cell_x
# construct top
if rect.top() < y:
top_path = QPainterPath()
if y - rect.top() > cell_y:
top_path.moveTo(x + cell_x / 2, rect.top())
top_path.lineTo(x + cell_x / 2, y - cell_y)
top_path.moveTo(x + cell_x * 1.5, y - cell_y)
top_path.lineTo(x + cell_x * 1.5, y)
else:
top_path.moveTo(x + cell_x * 1.5, rect.top())
top_path.lineTo(x + cell_x * 1.5, y)
y_path.addPath(top_path)
# construct bottom
if rect.bottom() > y + total_y * 2 * cell_y:
bot_path = QPainterPath()
if rect.bottom() - y_down > cell_y:
bot_path.moveTo(x + cell_x / 2, y_down)
bot_path.lineTo(x + cell_x / 2, y_down + cell_y)
bot_path.moveTo(x + cell_x * 1.5, y_down + cell_y)
bot_path.lineTo(x + cell_x * 1.5, rect.bottom())
else:
bot_path.moveTo(x + cell_x / 2, y_down)
bot_path.lineTo(x + cell_x / 2, rect.bottom())
y_path.addPath(bot_path)
x_path = x_multiply(y_path, total_x, cell_x * 2)
# construct left
if rect.left() < x:
if x - rect.left() > cell_x:
left_path = QPainterPath()
left_width = x - cell_x - rect.left()
left_pos = rect.left() + left_width / 2
left_path.moveTo(left_pos, y)
left_path.lineTo(left_pos, y + cell_y)
sec_left_path = QPainterPath()
sec_left_path.moveTo(x - cell_x / 2, y + cell_y)
sec_left_path.lineTo(x - cell_x / 2, y + 2 * cell_y)
self.left_path = y_multiply(left_path, total_y, cell_y * 2)
sec_lef_path = y_multiply(sec_left_path, total_y, cell_y * 2)
if y > rect.top():
if y > rect.top() + cell_y:
self.left_path.moveTo(left_pos, rect.top())
self.left_path.lineTo(left_pos, y - cell_y)
sec_lef_path.moveTo(x - cell_x / 2, y - cell_y)
sec_lef_path.lineTo(x - cell_x / 2, y)
else:
sec_lef_path.moveTo(x - cell_x / 2, rect.top())
sec_lef_path.lineTo(x - cell_x / 2, y)
if rect.bottom() > y_down:
if rect.bottom() > y_down + cell_y:
self.left_path.moveTo(left_pos, y_down)
self.left_path.lineTo(left_pos, y_down + cell_y)
sec_lef_path.moveTo(x - cell_x / 2, y_down + cell_y)
sec_lef_path.lineTo(x - cell_x / 2, rect.bottom())
else:
self.left_path.moveTo(left_pos, y_down)
self.left_path.lineTo(left_pos, rect.bottom())
x_path.addPath(sec_lef_path)
else:
left_path = QPainterPath()
left_width = x - rect.left()
left_pos = rect.left() + left_width / 2
left_path.moveTo(rect.left() + left_width / 2, y + cell_y)
left_path.lineTo(rect.left() + left_width / 2, y + 2 * cell_y)
self.left_path = y_multiply(left_path, total_y, cell_y * 2)
if y > rect.top():
if y > rect.top() + cell_y:
self.left_path.moveTo(left_pos, y - cell_y)
self.left_path.lineTo(left_pos, y)
else:
self.left_path.moveTo(left_pos, rect.top())
self.left_path.lineTo(left_pos, y)
if rect.bottom() > y_down:
if rect.bottom() > y_down + cell_y:
self.left_path.moveTo(left_pos, y_down + cell_y)
self.left_path.lineTo(left_pos, rect.bottom())
self.left_path_width = left_width
else:
self.left_path = None
# construct right
if rect.right() > x_right:
if rect.right() >= x_right + cell_x:
sec_right_path = QPainterPath()
sec_right_path.moveTo(x_right + cell_x / 2, y)
sec_right_path.lineTo(x_right + cell_x / 2, y + cell_y)
sec_rig_path = y_multiply(sec_right_path, total_y, cell_y * 2)
right_path = QPainterPath()
right_width = rect.right() - (x_right + cell_x)
right_pos = rect.right() - right_width / 2
right_path.moveTo(right_pos, y + cell_y)
right_path.lineTo(right_pos, y + 2 * cell_y)
self.right_path = y_multiply(right_path, total_y, cell_y * 2)
if y > rect.top():
if y > rect.top() + cell_y:
sec_rig_path.moveTo(x_right + cell_x / 2, rect.top())
sec_rig_path.lineTo(x_right + cell_x / 2, y - cell_y)
self.right_path.moveTo(right_pos, y - cell_y)
self.right_path.lineTo(right_pos, y)
else:
self.right_path.moveTo(right_pos, rect.top())
self.right_path.lineTo(right_pos, y)
if rect.bottom() > y_down:
if rect.bottom() > y_down + cell_y:
sec_rig_path.moveTo(x_right + cell_x / 2, y_down)
sec_rig_path.lineTo(
x_right + cell_x / 2, y_down + cell_y)
self.right_path.moveTo(right_pos, y_down + cell_y)
self.right_path.lineTo(right_pos, rect.bottom())
else:
sec_rig_path.moveTo(x_right + cell_x / 2, y_down)
sec_rig_path.lineTo(
x_right + cell_x / 2, rect.bottom())
x_path.addPath(sec_rig_path)
else:
right_path = QPainterPath()
right_width = rect.right() - x_right
right_pos = rect.right() - right_width / 2
right_path.moveTo(right_pos, y)
right_path.lineTo(right_pos, y + cell_y)
self.right_path = y_multiply(right_path, total_y, cell_y * 2)
if y > rect.top():
if y > rect.top() + cell_y:
self.right_path.moveTo(right_pos, rect.top())
self.right_path.lineTo(right_pos, y - cell_y)
if rect.bottom() > y_down:
if rect.bottom() > y_down + cell_y:
self.right_path.moveTo(right_pos, y_down)
self.right_path.lineTo(right_pos, y_down + cell_y)
else:
self.right_path.moveTo(right_pos, y_down)
self.right_path.lineTo(right_pos, rect.bottom())
self.right_path_width = right_width
else:
self.right_path = None
path.setFillRule(Qt.FillRule.WindingFill)
self.setPath(x_path)
pen = QPen(theme.fill_pen)
pen.setWidthF(cell_x)
self.setPen(QPen(
theme.fill_pen.color(), cell_x,
Qt.PenStyle.SolidLine, Qt.PenCapStyle.FlatCap))
def boundingRect(self) -> QRectF:
# prevent the grid widget to make the scene Rect growing infinitely
return self._bounding_rect
def paint(self, painter: QPainter, option, widget):
if canvas.loading_items:
return
painter.save()
painter.setRenderHint(QPainter.RenderHint.Antialiasing, False)
QGraphicsPathItem.paint(self, painter, option, widget)
painter.drawPath(self.path())
# for left and right paths, alpha channel is strangly too low
# after changing the pen width.
sides_color = self.pen().color()
sides_color.setAlphaF(min(sides_color.alphaF() * 1.707, 1.0))
if self.left_path is not None:
pen = QPen(self.pen())
pen.setWidthF(self.left_path_width)
pen.setColor(sides_color)
painter.setPen(pen)
painter.drawPath(self.left_path)
if self.right_path is not None:
pen = QPen(self.pen())
pen.setWidthF(self.right_path_width)
pen.setColor(sides_color)
painter.setPen(pen)
painter.drawPath(self.right_path)
# pen = QPen(QColor(168, 120, 0), 1.0)
# painter.setPen(pen)
# painter.drawEllipse(self._pointt, 3.0, 3.0)
painter.restore()
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