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|
#!/usr/bin/env python3
# -*- coding: utf-8 -*-
# PatchBay Canvas engine using QGraphicsView/Scene
# Copyright (C) 2010-2019 Filipe Coelho <falktx@falktx.com>
# Copyright (C) 2019-2024 Mathieu Picot <picotmathieu@gmail.com>
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License as
# published by the Free Software Foundation; either version 2 of
# the License, or any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# For a full copy of the GNU General Public License see the doc/GPL.txt file.
from dataclasses import dataclass
from typing import Optional, Union
from qtpy.QtCore import QRectF, QMarginsF, Qt
from qtpy.QtWidgets import QGraphicsView
from patshared import PortMode
from .init_values import canvas, options, Direction
from .utils import (previous_left_on_grid, next_left_on_grid,
previous_top_on_grid, next_top_on_grid)
from .scene_moth import MovingBox, PatchSceneMoth
from .box_widget_moth import BoxWidgetMoth
from .scene_view import PatchGraphicsView
@dataclass
class BoxAndRect:
rect: QRectF
item: BoxWidgetMoth
@dataclass
class ToMoveBox:
directions: list[Direction]
item: BoxWidgetMoth
rect: QRectF
repulser: BoxAndRect
def __lt__(self, other: 'ToMoveBox'):
if self.directions != other.directions:
return self.directions < other.directions
# should not happen
if not self.directions:
return True
last_direc = self.directions[-1]
if last_direc is Direction.LEFT:
return self.rect.right() > other.rect.right()
if last_direc is Direction.UP:
return self.rect.bottom() > other.rect.bottom()
if last_direc is Direction.RIGHT:
return self.rect.left() < other.rect.left()
if last_direc is Direction.DOWN:
return self.rect.top() < other.rect.top()
# should not happen
return True
class PatchScene(PatchSceneMoth):
'''This class part of the scene is for repulsive boxes option
because the algorythm is not simple and takes a lot of lines.
See scene_moth.py for others scene methods.'''
def __init__(self, view: PatchGraphicsView):
PatchSceneMoth.__init__(self, view)
self._full_repulse_boxes = set[BoxWidgetMoth]()
def deplace_boxes_from_repulsers(self, repulser_boxes: list[BoxWidgetMoth],
wanted_direction=Direction.NONE,
mov_repulsables: Optional[list[MovingBox]]=None):
'''Change the place of boxes in order to have no box overlapping
other boxes.'''
def get_direction(fixed_rect: QRectF, moving_rect: QRectF,
parent_directions=list[Direction]()) -> Direction:
if (moving_rect.top() <= fixed_rect.center().y() <= moving_rect.bottom()
or fixed_rect.top() <= moving_rect.center().y() <= fixed_rect.bottom()):
if (fixed_rect.right() < moving_rect.center().x()
and fixed_rect.center().x() < moving_rect.left()):
if Direction.LEFT in parent_directions:
return Direction.LEFT
return Direction.RIGHT
if (fixed_rect.left() > moving_rect.center().x()
and fixed_rect.center().x() > moving_rect.right()):
if Direction.RIGHT in parent_directions:
return Direction.RIGHT
return Direction.LEFT
if fixed_rect.center().y() <= moving_rect.center().y():
if Direction.UP in parent_directions:
return Direction.UP
return Direction.DOWN
if Direction.DOWN in parent_directions:
return Direction.DOWN
return Direction.UP
def repulse(direction: Direction,
fixed: BoxWidgetMoth | QRectF,
moving: BoxWidgetMoth | QRectF,
fixed_port_mode: PortMode,
moving_port_mode: PortMode) -> QRectF:
'''returns a QRectF to be placed at side of fixed_rect
where fixed_rect is an already determinated futur place
for a box'''
if isinstance(fixed, BoxWidgetMoth):
fixed_rect = fixed.boundingRect().translated(fixed.pos())
else:
fixed_rect = fixed
if isinstance(moving, BoxWidgetMoth):
rect = moving.boundingRect().translated(moving.pos())
else:
rect = moving
x = rect.left()
y = rect.top()
spacing = canvas.theme.box_spacing
spacing_hor = canvas.theme.box_spacing_horizontal
if direction in (Direction.LEFT, Direction.RIGHT):
if direction is Direction.LEFT:
if (fixed_port_mode & PortMode.INPUT
or moving_port_mode & PortMode.OUTPUT):
x = previous_left_on_grid(
fixed_rect.left() - rect.width() - spacing_hor)
else:
x = previous_left_on_grid(
fixed_rect.left() - rect.width() - spacing)
else:
if (fixed_port_mode & PortMode.OUTPUT
or moving_port_mode & PortMode.INPUT):
x = next_left_on_grid(fixed_rect.right() + spacing_hor)
else:
x = next_left_on_grid(fixed_rect.right() + spacing)
top_diff = abs(fixed_rect.top() - rect.top())
bottom_diff = abs(fixed_rect.bottom() - rect.bottom())
if bottom_diff > top_diff and top_diff <= magnet:
y = fixed_rect.top()
elif bottom_diff <= magnet:
y = fixed_rect.bottom() - rect.height()
elif direction in (Direction.UP, Direction.DOWN):
if direction is Direction.UP:
y = previous_top_on_grid(
fixed_rect.top() - rect.height() - spacing)
else:
y = next_top_on_grid(fixed_rect.bottom() + spacing)
left_diff = abs(fixed_rect.left() - rect.left())
right_diff = abs(fixed_rect.right() - rect.right())
if right_diff > left_diff and left_diff <= magnet:
x = fixed_rect.left()
elif right_diff <= magnet:
x = fixed_rect.right() - rect.width()
return QRectF(float(x), float(y), rect.width(), rect.height())
def rect_has_to_move_from(
repulser_rect: QRectF, rect: QRectF,
repulser_port_mode: PortMode, rect_port_mode: PortMode) -> bool:
left_spacing = right_spacing = box_spacing
if (repulser_port_mode & PortMode.INPUT
or rect_port_mode & PortMode.OUTPUT):
left_spacing = box_spacing_hor
if (repulser_port_mode & PortMode.OUTPUT
or rect_port_mode & PortMode.INPUT):
right_spacing = box_spacing_hor
return rect.intersects(
repulser_rect.adjusted(
- left_spacing, - box_spacing,
right_spacing, box_spacing))
def rect_may_have_to_move_from(
repulser_rect: QRectF, rect: QRectF) -> bool:
return rect.intersects(
repulser_rect.marginsAdded(normal_margins))
# --- --- ---
# --- function start ---
if not options.prevent_overlap:
return
box_spacing = canvas.theme.box_spacing
box_spacing_hor = canvas.theme.box_spacing_horizontal
magnet = canvas.theme.magnet
to_move_boxes = list[ToMoveBox]()
repulsers = list[BoxAndRect]()
wanted_directions = [wanted_direction]
normal_margins = QMarginsF(
canvas.theme.box_spacing_horizontal,
canvas.theme.box_spacing,
canvas.theme.box_spacing_horizontal,
canvas.theme.box_spacing)
for box in repulser_boxes:
self._full_repulse_boxes.add(box)
if mov_repulsables is not None:
# in view change the moving box for this box
# is the first of the list (optimisation).
# there is only one repulser
srect = mov_repulsables[0].final_rect # type:ignore wtf
else:
# if box is already moving, consider its end position
moving_box = self.move_boxes.get(box)
if moving_box is None:
srect = box.after_wrap_rect().translated(box.pos())
else:
srect = moving_box.final_rect
if srect.isNull():
# if this box is joining or hidding,
# it will be removed soon
# so, it has not to be a repulser.
continue
repulser = BoxAndRect(srect, box)
repulsers.append(repulser)
items_to_move = list[BoxAndRect]()
if mov_repulsables is not None:
for moving_box in mov_repulsables[1:]:
if moving_box.widget in [b.item for b in to_move_boxes]:
continue
if not rect_may_have_to_move_from(
repulser.rect, moving_box.final_rect):
continue
if rect_has_to_move_from(
repulser.rect, moving_box.final_rect,
repulser.item.get_current_port_mode(),
moving_box.widget.get_current_port_mode()):
items_to_move.append(
BoxAndRect(moving_box.final_rect, moving_box.widget))
else:
search_rect = srect.marginsAdded(
QMarginsF(canvas.theme.box_spacing_horizontal,
canvas.theme.box_spacing,
canvas.theme.box_spacing_horizontal,
canvas.theme.box_spacing))
# search intersections in non moving boxes
for widget in self.items(
search_rect, Qt.ItemSelectionMode.IntersectsItemShape,
Qt.SortOrder.AscendingOrder):
if not isinstance(widget, BoxWidgetMoth):
continue
if (widget in repulser_boxes
or widget in [b.item for b in to_move_boxes]
or widget in self.move_boxes):
continue
irect = widget.sceneBoundingRect()
if rect_has_to_move_from(
repulser.rect, irect,
repulser.item.get_current_port_mode(),
widget.get_current_port_mode()):
items_to_move.append(BoxAndRect(irect, widget))
# search intersections in moving boxes
for widget, moving_box in self.move_boxes.items():
if (widget in repulser_boxes
or moving_box.final_rect.isNull()
or widget in [b.item for b in to_move_boxes]):
continue
irect = moving_box.final_rect
if rect_has_to_move_from(
repulser.rect, irect,
repulser.item.get_current_port_mode(),
widget.get_current_port_mode()):
items_to_move.append(BoxAndRect(irect, widget))
for item_to_move in items_to_move:
item = item_to_move.item
irect = item_to_move.rect
# evaluate in which direction should go the box
direction = get_direction(srect, irect, wanted_directions)
to_move_boxes.append(ToMoveBox([direction], item, irect, repulser))
to_move_boxes.sort()
# !!! to_move_boxes list is dynamic
# elements can be added to the list while iteration !!!
for to_move_box in to_move_boxes:
item, irect, repulser = \
to_move_box.item, to_move_box.rect, to_move_box.repulser
directions = to_move_box.directions.copy()
new_direction = get_direction(repulser.rect, irect, directions)
directions.append(new_direction)
# calculate the new position of the box repulsed by its repulser
new_rect = repulse(new_direction, repulser.rect, irect,
repulser.item.get_current_port_mode(),
item.get_current_port_mode())
active_repulsers = list[BoxAndRect]()
# while there is a repulser rect at new box position
# move the future box position
while True:
# list just here to prevent infinite loop
# we save the repulsers that already have moved the rect
for repulser in repulsers:
if rect_has_to_move_from(
repulser.rect, new_rect,
repulser.item.get_current_port_mode(),
item.get_current_port_mode()):
if repulser in active_repulsers:
continue
active_repulsers.append(repulser)
new_direction = get_direction(
repulser.rect, new_rect, directions)
new_rect = repulse(
new_direction, repulser.rect, new_rect,
repulser.item._current_port_mode,
item._current_port_mode)
directions.append(new_direction)
break
else:
break
# Now we know where the box will be definitely positioned
# So, this is now a repulser for other boxes
repulser = BoxAndRect(new_rect, item)
repulsers.append(repulser)
self._full_repulse_boxes.add(item)
# check which existing boxes exists at the new place of the box
# and add them to this to_move_boxes iteration
adding_list = list[ToMoveBox]()
if mov_repulsables is not None:
for moving_box in mov_repulsables: # type:ignore
mitem = moving_box.widget
if (mitem in [r.item for r in repulsers]
or mitem in [b.item for b in to_move_boxes]):
continue
if rect_has_to_move_from(
new_rect, moving_box.final_rect,
to_move_box.item.get_current_port_mode(),
mitem.get_current_port_mode()):
adding_list.append(
ToMoveBox(directions, moving_box.widget,
moving_box.final_rect, repulser))
else:
search_rect = new_rect.marginsAdded(
QMarginsF(canvas.theme.box_spacing_horizontal,
canvas.theme.box_spacing,
canvas.theme.box_spacing_horizontal,
canvas.theme.box_spacing))
for widget in self.items(search_rect):
if not isinstance(widget, BoxWidgetMoth):
continue
if (widget in [r.item for r in repulsers]
or widget in [b.item for b in to_move_boxes]
or widget in self.move_boxes):
continue
mirect = widget.sceneBoundingRect()
if rect_has_to_move_from(
new_rect, mirect,
to_move_box.item.get_current_port_mode(),
widget.get_current_port_mode()):
adding_list.append(
ToMoveBox(directions, widget, mirect, repulser))
for mitem, moving_box in self.move_boxes.items():
if (mitem in [r.item for r in repulsers]
or moving_box.final_rect.isNull()
or mitem in [b.item for b in to_move_boxes]):
continue
if rect_has_to_move_from(
new_rect, moving_box.final_rect,
to_move_box.item.get_current_port_mode(),
mitem.get_current_port_mode()):
adding_list.append(
ToMoveBox(directions, moving_box.widget,
moving_box.final_rect, repulser))
adding_list.sort()
for to_move_box in adding_list:
to_move_boxes.append(to_move_box)
# now we decide where the box is moved
self.add_box_to_animation(
item, int(new_rect.left()), int(new_rect.top()))
def full_repulse(self):
if not options.prevent_overlap:
return
self._full_repulse_boxes.clear()
for box in canvas.list_boxes():
if box.isVisible() and not box in self.move_boxes:
self.add_box_to_animation(box, *box.top_left())
# in view change, all boxes are in self.move_boxes
moving_boxes = [mb for b, mb in self.move_boxes.items()
if (not mb.final_rect.isNull()
and b.isVisible())]
while moving_boxes:
self.deplace_boxes_from_repulsers(
[moving_boxes[0].widget],
mov_repulsables=moving_boxes)
to_rm_movboxes = [mb for mb in moving_boxes
if mb.widget in self._full_repulse_boxes]
for to_rm_mb in to_rm_movboxes:
moving_boxes.remove(to_rm_mb)
self._full_repulse_boxes.clear()
def bring_neighbors_and_deplace_boxes(
self, box_widget: BoxWidgetMoth, ex_rect: QRectF):
if not options.prevent_overlap:
return
neighbors = [box_widget]
limit_top = ex_rect.top()
less_y = ex_rect.height() - box_widget.after_wrap_rect().height()
box_spacing = canvas.theme.box_spacing
for neighbor in neighbors:
if neighbor is box_widget:
srect = ex_rect
else:
moving_box = self.move_boxes.get(neighbor)
if moving_box is None:
srect = neighbor.after_wrap_rect().translated(
neighbor.pos())
else:
srect = moving_box.final_rect
for item in self.items(
srect.adjusted(0, 0, 0,
box_spacing + 1)):
if item not in neighbors and isinstance(item, BoxWidgetMoth):
nrect = item.after_wrap_rect().translated(item.pos())
if nrect.top() >= limit_top:
neighbors.append(item)
neighbors.remove(box_widget)
repulser_boxes = list[BoxWidgetMoth]()
for neighbor in neighbors:
x, y = neighbor.top_left()
self.add_box_to_animation(neighbor, x, int(y - less_y))
repulser_boxes.append(neighbor)
repulser_boxes.append(box_widget)
self.deplace_boxes_from_repulsers(
repulser_boxes, wanted_direction=Direction.UP)
|
