import sys, os

_root = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
_gui  = os.path.dirname(os.path.abspath(__file__))
for _p in [_root, _gui]:
    if _p not in sys.path:
        sys.path.insert(0, _p)

from PyQt5.QtWidgets import (
    QWidget, QScrollArea, QGridLayout, QVBoxLayout, QFrame,
)
from PyQt5.QtCore import Qt

from data_model  import ReceiverManager
from plot_widget import SinglePlotWidget


class PlotTab(QWidget):
    NUM_PLOTS = 8

    def __init__(self, model: ReceiverManager):
        super().__init__()
        outer = QVBoxLayout(self)
        outer.setContentsMargins(0, 0, 0, 0)

        scroll = QScrollArea()
        scroll.setWidgetResizable(True)
        scroll.setHorizontalScrollBarPolicy(Qt.ScrollBarAlwaysOff)

        container = QWidget()
        grid = QGridLayout(container)
        grid.setContentsMargins(4, 4, 4, 4)
        grid.setSpacing(6)

        for i in range(self.NUM_PLOTS):
            frame = QFrame()
            frame.setFrameShape(QFrame.StyledPanel)
            frame.setFrameShadow(QFrame.Raised)
            fl = QVBoxLayout(frame)
            fl.setContentsMargins(2, 2, 2, 2)
            pw = SinglePlotWidget(model)
            pw.setMinimumHeight(230)
            fl.addWidget(pw)
            grid.addWidget(frame, i // 2, i % 2)

        scroll.setWidget(container)
        outer.addWidget(scroll)