89 lines
2.0 KiB
Python
89 lines
2.0 KiB
Python
import random
|
|
import math
|
|
|
|
import cairo
|
|
|
|
class IconLayout:
|
|
DISTANCE_THRESHOLD = 120.0
|
|
|
|
def __init__(self, grid):
|
|
self._icons = []
|
|
self._constraints = {}
|
|
self._grid = grid
|
|
|
|
[self._x1, self._y1] = self._grid.convert_to_canvas(1, 1)
|
|
[self._x2, self._y2] = self._grid.convert_to_canvas(78, 59)
|
|
|
|
def add_icon(self, icon):
|
|
self._icons.append(icon)
|
|
self._layout_icon(icon)
|
|
|
|
def remove_icon(self, icon):
|
|
self._icons.remove(icon)
|
|
del self._constraints[icon]
|
|
|
|
def _get_distance(self, icon1, icon2):
|
|
[icon1_x, icon1_y] = self._constraints[icon1]
|
|
[icon2_x, icon2_y] = self._constraints[icon2]
|
|
|
|
a = icon1_x - icon2_x
|
|
b = icon1_y - icon2_y
|
|
|
|
return math.sqrt(a * a + b * b)
|
|
|
|
def _get_repulsion(self, icon1, icon2):
|
|
[icon1_x, icon1_y] = self._constraints[icon1]
|
|
[icon2_x, icon2_y] = self._constraints[icon2]
|
|
|
|
f_x = icon1_x - icon2_x
|
|
f_y = icon1_y - icon2_y
|
|
|
|
return [f_x, f_y]
|
|
|
|
def _spread_icons(self):
|
|
self._stable = True
|
|
|
|
for icon1 in self._icons:
|
|
vx = 0
|
|
vy = 0
|
|
|
|
[x, y] = self._constraints[icon1]
|
|
|
|
for icon2 in self._icons:
|
|
if icon1 != icon2:
|
|
distance = self._get_distance(icon1, icon2)
|
|
if distance <= IconLayout.DISTANCE_THRESHOLD:
|
|
self._stable = False
|
|
[f_x, f_y] = self._get_repulsion(icon1, icon2)
|
|
vx += f_x
|
|
vy += f_y
|
|
|
|
new_x = x + vx
|
|
new_y = y + vy
|
|
|
|
new_x = max(self._x1, new_x)
|
|
new_y = max(self._y1, new_y)
|
|
|
|
[width, height] = icon1.get_size_request()
|
|
new_x = min(self._x2 - width, new_x)
|
|
new_y = min(self._y2 - height, new_y)
|
|
|
|
self._constraints[icon1] = [new_x, new_y]
|
|
|
|
matrix = cairo.Matrix(1, 0, 0, 1, 0, 0)
|
|
matrix.translate(new_x, new_y)
|
|
icon1.set_transform(matrix)
|
|
|
|
def _layout_icon(self, icon):
|
|
[width, height] = icon.get_size_request()
|
|
x = random.random() * (self._x2 - self._x1 - width)
|
|
y = random.random() * (self._y2 - self._y1 - height)
|
|
|
|
self._constraints[icon] = [x, y]
|
|
|
|
tries = 10
|
|
self._spread_icons()
|
|
while not self._stable and tries > 0:
|
|
self._spread_icons()
|
|
tries -= 1
|