Source code for TermTk.TTkWidgets.graph

# MIT License
#
# Copyright (c) 2021 Eugenio Parodi <ceccopierangiolieugenio AT googlemail DOT com>
#
# 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
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# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
# SOFTWARE.

__all__ = ['TTkGraph']

# inspired by:
# https://grafana.com/docs/grafana/latest/panels/visualizations/graph-panel/
# And of course:
# https://github.com/aristocratos/bpytop

from TermTk.TTkCore.cfg import TTkCfg
from TermTk.TTkCore.color import TTkColor
from TermTk.TTkCore.constant import TTkK
from TermTk.TTkWidgets.widget import TTkWidget

[docs] class TTkGraph(TTkWidget): __slots__ = ('_data', '_maxData', '_offset', '_direction', '_align', '_color') def __init__(self, *, color:TTkColor=TTkColor.RST, maxData:int=0x1000, direction:int=TTkK.RIGHT, align:TTkK.Alignment=TTkK.LEFT_ALIGN, **kwargs) -> None: self._data = [[0]] self._offset = 0 self._color = color self._align = align self._maxData = maxData self._direction = direction super().__init__(**kwargs)
[docs] def color(self): return self._color
[docs] def setColor(self, color): if self._color != color: self._color = color self.update()
[docs] def addValue(self, values): self._data.append(values) self.update()
def paintEvent(self, canvas): if not self._data: return w,h = self.size() x=0 if self._align == TTkK.CENTER: y = h//2 elif self._align == TTkK.TOP: y = 0 else: y = h v1,v2 = [0],[0] i=0 data = self._data[-w*2:] # TTkLog.debug(data) # TODO: use deep unpacking technique to grab couples of values # https://mathspp.com/blog/pydonts/enumerate-me#deep-unpacking mv = max(max(map(max,data)),-min(map(min,data))) zoom = 2*h/mv if mv>0 else 1.0 for i in range(len(data)): v2 = v1 v1 = data[i] if i%2==0: if self._direction == TTkK.RIGHT: canvas.drawHChart(pos=(x+i//2,y),values=(v2,v1), zoom=zoom, color=self._color.modParam(val=-y)) else: canvas.drawHChart(pos=(w-(x+i//2),y),values=(v1,v2), zoom=zoom, color=self._color.modParam(val=-y)) if i%2==1: if self._direction == TTkK.RIGHT: canvas.drawHChart(pos=(x+i//2+1,y),values=(v1,v1), zoom=zoom, color=self._color.modParam(val=-y)) else: canvas.drawHChart(pos=(w-(x+i//2+1),y),values=(v1,v1), zoom=zoom, color=self._color.modParam(val=-y))