[main] actions for table and plot display

main_window.py

@@ -4,7 +4,7 @@ from PyQt5.QtGui import QIcon, QKeySequence
 from PyQt5.QtCore import QSize, QSettings
 from numpy import unique
 
-from file_handler import FileHandler
+from file_handler import FileHandler, NodeType
 import constants as cnst
 import communicator as comm
 from central_widget import CentralWidget
@@ -13,7 +13,7 @@ class NixView(QMainWindow):
     
     def __init__(self, *args, **kwargs):
         super(NixView, self).__init__(*args, **kwargs)
-        
+        self._current_item = None
         self.setWindowTitle("NixView")
         self.setWindowIcon(QIcon('./icons/nixview.icns'))
 
@@ -26,11 +26,19 @@ class NixView(QMainWindow):
         self.setCentralWidget(self._cw)
         
         comm.communicator.open_recent.connect(self.on_open_recent)
+        comm.communicator.item_selected.connect(self.on_item_selected)
         self.show()
 
     def on_open_recent(self, event):
         self.open_file(event)
 
+    def on_item_selected(self, current):
+        self._current_item = current
+        current_item_type = current._node_descriptor.entity_type
+        enable = current_item_type == NodeType.MultiTag or current_item_type == NodeType.DataArray or current_item_type == NodeType.Tag
+        self._plot_action.setEnabled(enable)
+        self._table_action.setEnabled(enable)
+        
     def create_actions(self):
         self._file_open_action = QAction(QIcon("./icons/nix_open.png"), "Open", self)
         self._file_open_action.setStatusTip("Open nix file")
@@ -47,6 +55,17 @@ class NixView(QMainWindow):
         self._quit_action.setStatusTip("Close current file and quit")
         self._quit_action.triggered.connect(self.on_quit)
         
+        self._plot_action = QAction(QIcon("./icons/nix_plot.png"), "Plot", self)
+        self._plot_action.setStatusTip("Plot currently selected entity")
+        self._plot_action.setShortcut(QKeySequence("Ctrl+p"))
+        self._plot_action.setEnabled(False)
+        self._plot_action.triggered.connect(self.on_item_plot)
+        
+        self._table_action = QAction(QIcon("./icons/nix_table.png"), "Show table", self)
+        self._table_action.setStatusTip("Show data as table")
+        self._table_action.setShortcut(QKeySequence("Ctrl+t"))
+        self._table_action.setEnabled(False)
+        # self._table_action.triggered.connect(self.on_file_close)
         self.create_toolbar()
         self.create_menu() 
     
@@ -57,6 +76,9 @@ class NixView(QMainWindow):
         self._toolbar.addAction(self._file_open_action)
         self._toolbar.addAction(self._file_close_action)
         self._toolbar.addAction(self._quit_action)
+        self._toolbar.addSeparator()
+        self._toolbar.addAction(self._plot_action)
+        self._toolbar.addAction(self._table_action)
         self.addToolBar(self._toolbar)
 
     def create_menu(self):
@@ -65,6 +87,11 @@ class NixView(QMainWindow):
         file_menu.addAction(self._file_open_action)
         file_menu.addAction(self._file_close_action)
         file_menu.addAction(self._quit_action)
+        
+        plot_menu = menu.addMenu("&Plot")
+        plot_menu.addAction(self._plot_action)
+        plot_menu.addAction(self._table_action)
+        
         self.setMenuBar(menu)
     
     def _update_recent_files(self, filename):
@@ -81,6 +108,7 @@ class NixView(QMainWindow):
         del settings
     
     def open_file(self, filename):
+        self._current_item = None
         success, msg = self._file_handler.open(filename)
         self.statusBar().showMessage(msg, 5000)
         if success:
@@ -99,6 +127,7 @@ class NixView(QMainWindow):
     def on_file_close(self, s):
         self._file_handler.close()
         self._cw.reset()
+        self._current_item = None
         self._file_close_action.setEnabled(False)
         self.statusBar().showMessage("Successfully closed current file", 1000)