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Python/tkinter window manager
# The MIT License (MIT)
# Copyright (c) 2014 Alex Zylstra
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
# THE SOFTWARE.
__author__ = 'Alex Zylstra'
__date__ = '2014-03-26'
__version__ = '1.0.0'
import tkinter as tk
import numpy as np
import scipy, scipy.signal
import re
def parseGeometry(geometry):
"""Parse a tkinter geometry string.
:param geometry: A geometry string from `Toplevel.geometry`
:returns: A list containing [width, height, x, y]
"""
m = re.match("(\d+)x(\d+)([-+]\d+)([-+]\d+)", geometry)
if not m:
raise ValueError("failed to parse geometry string")
return list(map(int, m.groups()))
class WindowManager:
"""Window management functionality. This class acts as a manager for placement of all windows
created by modules and implosions via one of a few methods.
:param screenWidth: The width of the screen in pixels
:param screenHeight: The height of the screen in pixels
:author: Alex Zylstra
:date: 2014-03-26
"""
#: Step size in horizontal placement [pixels]
dx = 10
#: Step size in vertical placement [pixels]
dy = 10
def __init__(self, screenWidth, screenHeight):
"""Constructor for a new window manager."""
self.windows = []
self.screenWidth = screenWidth
self.screenHeight = screenHeight
def getLocation(self, width, height):
"""Get a location for a new window of specified size. Units in pixels.
:param width: The width of the window
:param height: The height of the window
:returns: tuple containing coordinates (x,y)
"""
usageMatrix = np.ones((self.screenHeight/20,self.screenWidth/20), dtype=np.float32)
for w in self.windows:
# Wrap in try/except block in case windows are totally deleted
try:
assert isinstance(w, tk.Toplevel) or isinstance(w, tk.Tk)
if w.wm_state() == 'normal':
g = parseGeometry(w.geometry())
# width of extra window stuff including title bar:
borderx = w.winfo_rootx() - g[2]
bordery = w.winfo_rooty() - g[3]
x = np.floor(g[2]/20)
y = np.floor((g[3])/20)
w = np.ceil((g[0]+borderx)/20)
h = np.ceil((g[1]+bordery)/20)
usageMatrix[y:y+h,x:x+w] = 0
except tk.TclError:
self.windows.remove(w)
except Exception as e:
print('An exception occurred in WindowManager.getLocation: ', e)
pass
b = np.ones((height/20,width/20), dtype=np.float32)
loc_ok = (scipy.signal.convolve2d(usageMatrix, b, 'valid') == int(width/20)*int(height/20))
try:
new_loc = np.argwhere(loc_ok)[0]
return 20*new_loc[1], 20*new_loc[0]
except Exception as e:
print('An exception occurred in WindowManager.getLocation: ', e)
return 0,0
def addWindow(self, w, passive=False):
"""Add a new window.
:param w: The new window (must be a :py:class:`tkinter.Toplevel` object)
:param passive: (optional) if set to True, the `WindowManager` will not change the current placement of w.
"""
assert isinstance(w, tk.Toplevel) or isinstance(w, tk.Tk)
w.update_idletasks()
# if requested, place the window:
if not passive:
# Get the width and height, then use the other function in this class to get a spot to put it:
g = parseGeometry(w.geometry())
width = g[0]
height = g[1]
x,y = self.getLocation(width, height)
# place:
w.geometry("%dx%d%+d%+d" % (width, height, x, y))
w.update_idletasks()
# add to the internal list of managed windows:
self.windows.append(w)
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