def __init__(self):
"""App for creating KD tree dynamically and executing range queries."""
self.tree = KDTree()
# for range query
self.selectedRegion = None
self.queryRect = None
master = tkinter.Tk()
master.maxsize(width=Size, height=Size + 26)
master.minsize(width=Size, height=Size + 26)
master.title('KD Tree Drawing and Query Application')
self.w = tkinter.Frame(master, width=Size, height=Size + 26)
self.canvas = tkinter.Canvas(self.w, width=Size, height=Size)
self.paint()
b = tkinter.Button(master, text="Reset", command=self.reset)
b.pack()
self.canvas.bind("<Button-1>", self.click)
self.canvas.bind("<Button-3>", self.range) # when right mouse clicked
self.canvas.bind("<ButtonRelease-3>", self.clear)
self.canvas.bind("<B3-Motion>",
self.range) # only when right mouse dragged
# Different bindings on Macintosh platform
self.canvas.bind("<Button-2>", self.range) # when right mouse clicked
self.canvas.bind("<ButtonRelease-2>", self.clear)
self.canvas.bind("<B2-Motion>",
self.range) # only when right mouse dragged
self.canvas.pack()
self.w.pack()
def generate(points):
"""Given a list of points construct balanced kd-tree."""
if len(points) == 0:
return None
# VERTICAL=1 is the initial division
tree = KDTree()
tree.root = generateSubTree(1, 2, points, 0, len(points)-1)
propagate(tree.root, maxRegion)
return tree
def generate(points):
"""Given a list of points construct balanced kd-tree."""
if len(points) == 0:
return None
# VERTICAL=1 is the initial division
tree = KDTree()
tree.root = generateSubTree(1, 2, points, 0, len(points) - 1)
propagate(tree.root, maxRegion)
return tree
def __init__(self):
"""App for creating KD tree dynamically and executing range queries."""
self.tree = KDTree()
# for range query
self.selectedRegion = None
self.queryRect = None
master = tkinter.Tk()
master.maxsize(width=Size, height=Size+26)
master.minsize(width=Size, height=Size+26)
master.title('KD Tree Drawing and Query Application')
self.w = tkinter.Frame(master, width=Size, height=Size+26)
self.canvas = tkinter.Canvas(self.w, width=Size, height=Size)
self.paint()
b = tkinter.Button(master, text="Reset", command=self.reset)
b.pack()
self.canvas.bind("<Button-1>", self.click)
self.canvas.bind("<Button-3>", self.range) # when right mouse clicked
self.canvas.bind("<ButtonRelease-3>", self.clear)
self.canvas.bind("<B3-Motion>", self.range) # only when right mouse dragged
# Different bindings on Macintosh platform
self.canvas.bind("<Button-2>", self.range) # when right mouse clicked
self.canvas.bind("<ButtonRelease-2>", self.clear)
self.canvas.bind("<B2-Motion>", self.range) # only when right mouse dragged
self.canvas.pack()
self.w.pack()
def reset(self):
"""Reset to initial state."""
self.tree = KDTree()
self.paint()
class KDTreeApp:
def __init__(self):
"""App for creating KD tree dynamically and executing range queries."""
self.tree = KDTree()
# for range query
self.selectedRegion = None
self.queryRect = None
master = tkinter.Tk()
master.maxsize(width=Size, height=Size + 26)
master.minsize(width=Size, height=Size + 26)
master.title('KD Tree Drawing and Query Application')
self.w = tkinter.Frame(master, width=Size, height=Size + 26)
self.canvas = tkinter.Canvas(self.w, width=Size, height=Size)
self.paint()
b = tkinter.Button(master, text="Reset", command=self.reset)
b.pack()
b = tkinter.Button(master, text="Balance", command=self.rebalance)
b.pack()
self.canvas.bind("<Button-1>", self.click)
self.canvas.bind("<Button-3>", self.range) # when right mouse clicked
self.canvas.bind("<ButtonRelease-3>", self.clear)
self.canvas.bind("<B3-Motion>",
self.range) # only when right mouse dragged
# Different bindings on Macintosh platform
self.canvas.bind("<Button-2>", self.range) # when right mouse clicked
self.canvas.bind("<ButtonRelease-2>", self.clear)
self.canvas.bind("<B2-Motion>",
self.range) # only when right mouse dragged
self.canvas.pack()
self.w.pack()
def rebalance(self):
"""Rebalance points in tree"""
points = [p for p in self.tree]
if points:
self.tree = kd_factory.generate(points)
self.paint()
def reset(self):
"""Reset to initial state."""
self.tree = KDTree()
self.paint()
def toCartesian(self, y):
"""Convert tkinter point into Cartesian."""
return Size - y
def toTk(self, y):
"""Convert Cartesian into tkinter point."""
if y == maxValue: return 0
tk_y = Size
if y != minValue:
tk_y -= y
return tk_y
def clear(self, event):
"""End of range search."""
self.selectedRegion = None
self.paint()
def range(self, event):
"""Initiate a range search using a selected rectangular region."""
p = (event.x, self.toCartesian(event.y))
if self.selectedRegion is None:
self.selectedStart = Region(p[X], p[Y], p[X], p[Y])
self.selectedRegion = self.selectedStart.unionPoint(p)
self.paint()
# return (node,sub-tree) where sub-tree is True if draining entire tree
# rooted at node. Draw these as shaded red rectangle to identify whole
# sub-tree is selected.
for pair in self.tree.range(self.selectedRegion):
p = pair[0].point
if pair[1]:
self.canvas.create_rectangle(pair[0].region.x_min,
self.toTk(pair[0].region.y_min),
pair[0].region.x_max,
self.toTk(pair[0].region.y_max),
fill='Red',
stipple='gray12')
else:
self.canvas.create_rectangle(p[X] - BoxSize,
self.toTk(p[Y]) - BoxSize,
p[X] + BoxSize,
self.toTk(p[Y]) + BoxSize,
fill='Red')
self.queryRect = self.canvas.create_rectangle(
self.selectedRegion.x_min,
self.toTk(self.selectedRegion.y_min),
self.selectedRegion.x_max,
self.toTk(self.selectedRegion.y_max),
outline='Red',
dash=(2, 4))
def click(self, event):
"""Add point to KDtree."""
p = (event.x, self.toCartesian(event.y))
self.tree.add(p)
self.paint()
def drawPartition(self, r, p, orient):
"""Draw partitioning line and points itself as a small square."""
if orient == VERTICAL:
self.canvas.create_line(p[X], self.toTk(r.y_min), p[X],
self.toTk(r.y_max))
else:
xlow = r.x_min
if r.x_min <= minValue: xlow = 0
xhigh = r.x_max
if r.x_max >= maxValue: xhigh = Size
self.canvas.create_line(xlow, self.toTk(p[Y]), xhigh,
self.toTk(p[Y]))
self.canvas.create_rectangle(p[X] - BoxSize,
self.toTk(p[Y]) - BoxSize,
p[X] + BoxSize,
self.toTk(p[Y]) + BoxSize,
fill='Black')
def visit(self, n):
""" Visit node to paint properly."""
if n == None: return
self.drawPartition(n.region, n.point, n.orient)
self.visit(n.below)
self.visit(n.above)
def paint(self):
"""Paint KD Tree by visiting all nodes."""
self.canvas.delete(tkinter.ALL)
self.visit(self.tree.root)
def reset(self):
"""Reset to initial state."""
self.tree = KDTree()
self.paint()
class KDTreeApp:
def __init__(self):
"""App for creating KD tree dynamically and executing range queries."""
self.tree = KDTree()
# for range query
self.selectedRegion = None
self.queryRect = None
master = tkinter.Tk()
master.maxsize(width=Size, height=Size+26)
master.minsize(width=Size, height=Size+26)
master.title('KD Tree Drawing and Query Application')
self.w = tkinter.Frame(master, width=Size, height=Size+26)
self.canvas = tkinter.Canvas(self.w, width=Size, height=Size)
self.paint()
b = tkinter.Button(master, text="Reset", command=self.reset)
b.pack()
self.canvas.bind("<Button-1>", self.click)
self.canvas.bind("<Button-3>", self.range) # when right mouse clicked
self.canvas.bind("<ButtonRelease-3>", self.clear)
self.canvas.bind("<B3-Motion>", self.range) # only when right mouse dragged
# Different bindings on Macintosh platform
self.canvas.bind("<Button-2>", self.range) # when right mouse clicked
self.canvas.bind("<ButtonRelease-2>", self.clear)
self.canvas.bind("<B2-Motion>", self.range) # only when right mouse dragged
self.canvas.pack()
self.w.pack()
def reset(self):
"""Reset to initial state."""
self.tree = KDTree()
self.paint()
def toCartesian(self, y):
"""Convert tkinter point into Cartesian."""
return Size - y
def toTk(self,y):
"""Convert Cartesian into tkinter point."""
if y == maxValue: return 0
tk_y = Size
if y != minValue:
tk_y -= y
return tk_y
def clear(self, event):
"""End of range search."""
self.selectedRegion = None
self.paint()
def range(self, event):
"""Initiate a range search using a selected rectangular region."""
p = (event.x, self.toCartesian(event.y))
if self.selectedRegion is None:
self.selectedStart = Region(p[X],p[Y], p[X],p[Y])
self.selectedRegion = self.selectedStart.unionPoint(p)
self.paint()
# return (node,sub-tree) where sub-tree is True if draining entire tree
# rooted at node. Draw these as shaded red rectangle to identify whole
# sub-tree is selected.
for pair in self.tree.range(self.selectedRegion):
p = pair[0].point
if pair[1]:
self.canvas.create_rectangle(pair[0].region.x_min, self.toTk(pair[0].region.y_min),
pair[0].region.x_max, self.toTk(pair[0].region.y_max),
fill='Red', stipple='gray12')
else:
self.canvas.create_rectangle(p[X] - BoxSize, self.toTk(p[Y]) - BoxSize,
p[X] + BoxSize, self.toTk(p[Y]) + BoxSize, fill='Red')
self.queryRect = self.canvas.create_rectangle(self.selectedRegion.x_min, self.toTk(self.selectedRegion.y_min),
self.selectedRegion.x_max, self.toTk(self.selectedRegion.y_max),
outline='Red', dash=(2, 4))
def click(self, event):
"""Add point to KDtree."""
p = (event.x, self.toCartesian(event.y))
self.tree.add(p)
self.paint()
def drawPartition (self, r, p, orient):
"""Draw partitioning line and points itself as a small square."""
if orient == VERTICAL:
self.canvas.create_line(p[X], self.toTk(r.y_min), p[X], self.toTk(r.y_max))
else:
xlow = r.x_min
if r.x_min <= minValue: xlow = 0
xhigh = r.x_max
if r.x_max >= maxValue: xhigh = Size
self.canvas.create_line(xlow, self.toTk(p[Y]), xhigh, self.toTk(p[Y]))
self.canvas.create_rectangle(p[X] - BoxSize, self.toTk(p[Y]) - BoxSize,
p[X] + BoxSize, self.toTk(p[Y]) + BoxSize,
fill='Black')
def visit (self, n):
""" Visit node to paint properly."""
if n == None: return
self.drawPartition(n.region, n.point, n.orient)
self.visit (n.below)
self.visit (n.above)
def paint(self):
"""Paint KD Tree by visiting all nodes."""
self.canvas.delete(tkinter.ALL)
self.visit(self.tree.root)