WeldingSpotPerformance/src/gui/plotter.py

import pandas as pd
from PyQt5.QtWidgets import QWidget, QVBoxLayout
import pyqtgraph as pg
import numpy as np
from numpy import floating
from typing import Optional, Any, NamedTuple

from src.utils.base.base import BasePlotWidget


class ProcessStage(NamedTuple):
    mean_value: floating[Any]
    start_index: int
    finish_index: int

class PlotWidget(BasePlotWidget):

    def _create_stage_ideal(self,
                             stage: str,
                             signal: str, 
                             times: pd.Series,
                             dataframe: pd.DataFrame) -> Optional[pg.LinearRegionItem]:
        stage_diff = np.diff(dataframe[stage])
        start_index = np.where(stage_diff == 1)[0]
        finish_index = np.where(stage_diff == -1)[0]
        data = self._stage_ideals[stage]()

        if start_index.size:
            start_timestamp = times[start_index[0]]
            finish_timestamp = times[finish_index[0]] if finish_index.size else times[len(times) - 1]
            plot = pg.PlotDataItem(x=start_timestamp+data["time"], y=data[signal["name"]], pen=signal["pen"])
            return plot
        return None
        

    def _create_stage_region(self,
                             stage: str,
                             times: pd.Series,
                             dataframe: pd.DataFrame) -> Optional[pg.LinearRegionItem]:
        stage_diff = np.diff(dataframe[stage])
        start_index = np.where(stage_diff == 1)[0]
        finish_index = np.where(stage_diff == -1)[0]

        if start_index.size:
            start_timestamp = times[start_index[0]]
            finish_timestamp = times[finish_index[0]] if finish_index.size else times[len(times) - 1]
            region = pg.LinearRegionItem([start_timestamp, finish_timestamp], movable=False)
            region.setBrush(pg.mkBrush(self._stage_colors[stage]))
            return region
        return None

    @staticmethod
    def _init_plot_widget(title: str) -> (pg.PlotWidget, pg.LegendItem):
        plot_widget = pg.PlotWidget(title=title)
        plot_widget.showGrid(x=True, y=True)
        legend = pg.LegendItem((80, 60), offset=(70, 20))
        legend.setParentItem(plot_widget.graphicsItem())
        return plot_widget, legend
    
    def get_stage_info(self,
                       stage: str,
                       dataframe: pd.DataFrame,
                       signal_name: str) -> Optional[ProcessStage]:
        if stage in self._stages:
            stage_diff = np.diff(dataframe[stage])
            start_index = np.where(stage_diff == 1)[0]
            finish_index = np.where(stage_diff == -1)[0]

            data = dataframe[signal_name] if signal_name in dataframe.columns.tolist() else []

            if data.size and start_index.size:
                start = start_index[0]
                finish = finish_index[0] if finish_index.size else (len(data) - 1)
                data_slice = data[start:finish]
                mean = np.mean(data_slice)
                return ProcessStage(mean_value=mean, start_index=int(start), finish_index=int(finish))
            return None
        
    def _build_widget(self, dataframe: pd.DataFrame) -> QWidget:
        widget = QWidget()
        layout = QVBoxLayout()

        time_axis = dataframe["time"]
        dataframe_headers = dataframe.columns.tolist()

        for channel, description in self._plt_channels.items():
            plot_widget, legend = self._init_plot_widget(title=channel)

            settings = description["Settings"]
            if settings["stages"] and all([stage in dataframe_headers for stage in self._stages]):
                for stage in self._stages:
                    region = self._create_stage_region(stage, time_axis, dataframe)
                    for signal in description["Ideal_signals"]:
                        ideal_plot = self._create_stage_ideal(stage, signal ,time_axis, dataframe)
                        if ideal_plot:
                            plot_widget.addItem(ideal_plot)
                    
                    if region:
                        plot_widget.addItem(region)
                    

            if settings["zoom"]:
                if max(time_axis) < 5.0:
                    stages = [self.get_stage_info("Welding",
                                                  dataframe,
                                                  signal["name"]) for signal in description["Real_signals"]]
                    if stages:
                        means_raw = [stage.mean_value for stage in stages]
                        mean = max(means_raw)
                        start = time_axis[stages[0].start_index]
                        finish = time_axis[stages[0].finish_index]

                        overshoot = pg.BarGraphItem(x0=0,
                                                    y0=mean - mean * 0.05,
                                                    height=mean * 0.05 * 2,
                                                    width=start,
                                                    brush=pg.mkBrush([0, 250, 0, 100]))
                        plot_widget.addItem(overshoot)

                        stable = pg.BarGraphItem(x0=start,
                                                 y0=mean - mean * 0.015,
                                                 height=mean * 0.015 * 2,
                                                 width=finish - start,
                                                 brush=pg.mkBrush([0, 250, 0, 100]))
                        plot_widget.addItem(stable)

                        plot_widget.setYRange(mean - 260, mean + 260)
                        plot_widget.setInteractive(False)
                else:
                    max_value = min([max(dataframe[signal["name"]]) for signal in description["Real_signals"]])
                    region = pg.LinearRegionItem([max_value - max_value * 0.015,
                                                  max_value + max_value * 0.015],
                                                 movable=False,
                                                 orientation="horizontal")

                    region.setBrush(pg.mkBrush([0, 250, 0, 100]))
                    plot_widget.setYRange(max_value - 200, max_value + 200)
                    plot_widget.setXRange(3.5, 4.5)
                    plot_widget.addItem(region)
                    plot_widget.setInteractive(False)

            for signal in description["Real_signals"]:
                if signal["name"] in dataframe_headers:
                    plot = plot_widget.plot(time_axis, dataframe[signal["name"]], pen=signal["pen"])
                    legend.addItem(plot, signal["name"])

            

            layout.addWidget(plot_widget)

        widget.setLayout(layout)
        return widget

    def build(self, data: list[pd.DataFrame]) -> None:
        widgets = [self._build_widget(data_sample) for data_sample in data]
        self._mediator.notify(self, widgets)