[plot] pass item to plot screen

central_widget.py

@@ -1,9 +1,10 @@
 import os
-from PyQt5.QtWidgets import QFrame, QLabel, QListWidget, QListWidgetItem, QStackedLayout, QVBoxLayout, QWidget, QGridLayout, QSpacerItem, QSizePolicy, QTreeView, QHeaderView
+from PyQt5.QtWidgets import QFrame, QGroupBox, QLabel, QListWidget, QListWidgetItem, QSplitter, QStackedLayout, QAbstractItemView, QVBoxLayout, QWidget, QGridLayout, QSpacerItem, QSizePolicy, QTreeView, QHeaderView
 from PyQt5.QtGui import QPixmap
-from PyQt5.QtCore import Qt, QSettings, QSize
+from PyQt5.QtCore import QItemSelectionModel, Qt, QSettings, QSize
 
 from file_handler import FileHandler
+from plot_screen import PlotScreen
 import communicator as comm
 import constants as cnst
 from tree_model import TreeModel, TreeType
@@ -15,16 +16,26 @@ class CentralWidget(QWidget):
         
         self._splash = SplashScreen()
         self._file_view = FileView(self)
+        self._plot_screen = PlotScreen(self)
+        self._plot_screen.close_signal.connect(self.on_plot_close)
         self._stack = QStackedLayout(self)
         self._stack.addWidget(self._splash)
         self._stack.addWidget(self._file_view)
+        self._stack.addWidget(self._plot_screen)
         self.setLayout(self._stack)
-        self.setStyleSheet("background-color: white;")
+        #self.setStyleSheet("background-color: white;")
 
     def show_file_content(self):
         self._stack.setCurrentIndex(1)
         self._file_view.update()
 
+    def plot_item(self, item):
+        self._stack.setCurrentIndex(2)
+        self._plot_screen.plot(item)
+
+    def on_plot_close(self):
+        self._stack.setCurrentIndex(1)
+
     def reset(self):
         self._file_view.reset()
         self._splash.reset()

main_window.py

@@ -135,4 +135,6 @@ class NixView(QMainWindow):
         self._file_handler.close()
         sys.exit()
         
-
+    def on_item_plot(self, s):
+        if self._current_item is not None:
+            self._cw.plot_item(self._current_item)