beremiz

IDE: fix again ruberband with gtk3.
wxPython4
2023-03-12, Edouard Tisserant
41be039fbb8c
IDE: fix again ruberband with gtk3.

DC logical functions are now disabled when using GTK3.
Apparently using XOR was still having an effect.
Use regular black pen with no logical funciton instead.
#!/usr/bin/env python
# -*- coding: utf-8 -*-
# This file is part of Beremiz
# Copyright (C) 2021: Edouard TISSERANT
#
# See COPYING file for copyrights details.
# Based on Eelco Hoogendoorn stackoverflow answer about RingBuffer with numpy
import numpy as np
class RingBuffer(object):
def __init__(self, width=None, size=131072, padding=None):
self.size = size
self.padding = size if padding is None else padding
shape = (self.size+self.padding,)
if width :
shape += (width,)
self.buffer = np.zeros(shape)
self.cursor = 0
def append(self, data):
"""this is an O(n) operation"""
data = data[-self.size:]
n = len(data)
if self.size + self.padding - self.cursor < n:
self.compact()
self.buffer[self.cursor:][:n] = data
self.cursor += n
@property
def count(self):
return min(self.size, self.cursor)
@property
def view(self):
"""this is always an O(1) operation"""
return self.buffer[max(0, self.cursor - self.size):][:self.count]
def compact(self):
"""
note: only when this function is called, is an O(size) performance hit incurred,
and this cost is amortized over the whole padding space
"""
print 'compacting'
self.buffer[:self.count] = self.view
self.cursor -= self.size