Initial snow flake layout implementation
This commit is contained in:
parent
1070ed3ae6
commit
0092d85d61
@ -10,4 +10,5 @@ sugar_PYTHON = \
|
||||
Menu.py \
|
||||
MenuIcon.py \
|
||||
MenuShell.py \
|
||||
SnowflakeLayout.py \
|
||||
Timeline.py
|
||||
|
62
sugar/canvas/SnowflakeLayout.py
Normal file
62
sugar/canvas/SnowflakeLayout.py
Normal file
@ -0,0 +1,62 @@
|
||||
import math
|
||||
|
||||
import cairo
|
||||
|
||||
class SnowflakeLayout:
|
||||
_BASE_RADIUS = 65
|
||||
_CHILDREN_FACTOR = 1
|
||||
_FLAKE_DISTANCE = 6
|
||||
_BORDER = 20
|
||||
|
||||
def __init__(self):
|
||||
self._root = None
|
||||
self._children = []
|
||||
|
||||
def set_root(self, icon):
|
||||
self._root = icon
|
||||
|
||||
def add_child(self, icon):
|
||||
self._children.append(icon)
|
||||
self._layout()
|
||||
|
||||
def remove_child(self, icon):
|
||||
self._children.remove(icon)
|
||||
self._layout()
|
||||
|
||||
def _layout_root(self):
|
||||
[width, height] = self._root.get_size_request()
|
||||
|
||||
matrix = cairo.Matrix(1, 0, 0, 1, 0, 0)
|
||||
matrix.translate(self._cx, self._cy)
|
||||
self._root.set_transform(matrix)
|
||||
|
||||
def _layout_child(self, child, index):
|
||||
r = self._r
|
||||
if (len(self._children) > 10):
|
||||
r += SnowflakeLayout._FLAKE_DISTANCE * (index % 3)
|
||||
|
||||
angle = 2 * math.pi / len(self._children) * index
|
||||
|
||||
x = self._cx + math.cos(angle) * r
|
||||
y = self._cy + math.sin(angle) * r
|
||||
|
||||
matrix = cairo.Matrix(1, 0, 0, 1, 0, 0)
|
||||
matrix.translate(x, y)
|
||||
child.set_transform(matrix)
|
||||
|
||||
def _layout(self):
|
||||
self._r = SnowflakeLayout._BASE_RADIUS + \
|
||||
SnowflakeLayout._CHILDREN_FACTOR * len(self._children)
|
||||
|
||||
c = self._r + SnowflakeLayout._BORDER + \
|
||||
SnowflakeLayout._FLAKE_DISTANCE * 2
|
||||
|
||||
self._cx = c
|
||||
self._cy = c
|
||||
|
||||
self._layout_root()
|
||||
|
||||
index = 0
|
||||
for child in self._children:
|
||||
self._layout_child(child, index)
|
||||
index += 1
|
66
tests/test-snowflake.py
Executable file
66
tests/test-snowflake.py
Executable file
@ -0,0 +1,66 @@
|
||||
#!/usr/bin/python
|
||||
import pygtk
|
||||
pygtk.require('2.0')
|
||||
import gobject
|
||||
|
||||
from sugar.session.UITestSession import UITestSession
|
||||
|
||||
session = UITestSession()
|
||||
session.start()
|
||||
|
||||
import sys
|
||||
import random
|
||||
|
||||
import gtk
|
||||
import goocanvas
|
||||
|
||||
from sugar.canvas.SnowflakeLayout import SnowflakeLayout
|
||||
from sugar.canvas import IconColor
|
||||
from sugar.canvas.IconItem import IconItem
|
||||
from sugar.canvas.CanvasView import CanvasView
|
||||
from sugar.canvas.Grid import Grid
|
||||
|
||||
def _create_snowflake(group, children):
|
||||
color = IconColor.IconColor()
|
||||
icon = IconItem(size=60, color=color,
|
||||
icon_name='activity-groupchat')
|
||||
group.add_child(icon)
|
||||
layout.set_root(icon)
|
||||
|
||||
for i in range(0, children):
|
||||
color = IconColor.IconColor()
|
||||
icon = IconItem(size=60, color=color,
|
||||
icon_name='stock-buddy')
|
||||
group.add_child(icon)
|
||||
layout.add_child(icon)
|
||||
|
||||
window = gtk.Window()
|
||||
window.connect("destroy", lambda w: gtk.main_quit())
|
||||
window.show()
|
||||
|
||||
canvas = CanvasView()
|
||||
canvas.show()
|
||||
window.add(canvas)
|
||||
|
||||
canvas_model = goocanvas.CanvasModelSimple()
|
||||
root = canvas_model.get_root_item()
|
||||
|
||||
item = goocanvas.Rect(x=0, y=0, width=1200, height=900,
|
||||
line_width=0.0, fill_color='#e2e2e2')
|
||||
root.add_child(item)
|
||||
|
||||
layout = SnowflakeLayout()
|
||||
group = goocanvas.Group()
|
||||
snow_flake = _create_snowflake(group, 30)
|
||||
root.add_child(group)
|
||||
|
||||
layout = SnowflakeLayout()
|
||||
group = goocanvas.Group()
|
||||
group.translate(500, 500)
|
||||
_create_snowflake(group, 8)
|
||||
root.add_child(group)
|
||||
|
||||
|
||||
canvas.set_model(canvas_model)
|
||||
|
||||
gtk.main()
|
Loading…
Reference in New Issue
Block a user