[main] store recent files in settings, add constants.py for global

constants

constants.py

@@ -0,0 +1,7 @@
+organization = "nixio"
+application = "nixview"
+version = 0.1
+
+settings_recent_files_key = "/".join([organization, application, "recent_files"])
+settings_recent_file_max_count_key =  "/".join([organization, application, "recent_files_max_count"])
+settings_recent_file_max_count = 10

file_handler.py

@@ -12,7 +12,6 @@ class Singleton(type):
 class FileHandler(metaclass=Singleton):
     
     def __init__(self) -> None:
-        print("Handler Init")
         super().__init__()
         self._nix_file = None
         self._file_requests = []

main_window.py

@@ -1,15 +1,19 @@
 import sys
+import os
 from typing import Hashable
 from PyQt5.QtWidgets import QFileDialog, QFrame, QLabel, QListWidget, QMainWindow, QMenuBar, QStackedLayout, QToolBar, QAction, QStatusBar, QVBoxLayout, QWidget, QGridLayout, QSpacerItem, QSizePolicy
 from PyQt5.QtGui import QIcon, QPixmap, QKeySequence
 from PyQt5.QtCore import Qt, QSize, QSettings
+from numpy import unique
 
 from file_handler import FileHandler
+import constants as cnst
 
 class NixView(QMainWindow):
     
     def __init__(self, *args, **kwargs):
         super(NixView, self).__init__(*args, **kwargs)
+        
         self.setWindowTitle("NixView")
         self.setWindowIcon(QIcon('./icons/nixview.icns'))
 
@@ -58,16 +62,31 @@ class NixView(QMainWindow):
         file_menu.addAction(self._quit_action)
         self.setMenuBar(menu)
     
+    def _update_recent_files(self, filename):
+        settings = QSettings(cnst.organization, cnst.application)
+        recent_file_max_count = settings.value(cnst.settings_recent_file_max_count_key, 10, type=int)
+        filenames = settings.value(cnst.settings_recent_files_key, [])
+        new_filenames = [filename]
+        if len(filenames) < recent_file_max_count:
+            new_filenames.extend(filenames)
+        else:
+            new_filenames.extend(filenames[:-1])
+        new_filenames = list(unique(new_filenames))
+        settings.setValue(cnst.settings_recent_files_key, new_filenames)
+        del settings
+        
     def on_file_open(self, s):
         dlg = QFileDialog(self, 'Open nix data file', '', "NIX files (*.h5 *.nix)")
         dlg.setFileMode(QFileDialog.ExistingFile)
         filenames = None
         if dlg.exec_():
             filenames = dlg.selectedFiles()
-            success, msg = self._file_handler.open("nix_test.h5")
+            success, msg = self._file_handler.open(filenames[0])
             self.statusBar().showMessage(msg, 5000)
-            self._file_close_action.setEnabled(success)
-            self._cw.show_file_content()
+            if success:
+                self._file_close_action.setEnabled(success)
+                self._cw.show_file_content()
+                self._update_recent_files(filenames[0])
 
     def on_file_close(self, s):
         self._file_handler.close()
@@ -136,7 +155,34 @@ class SplashScreen(QWidget):
         frame = QFrame()
         l  = QVBoxLayout()
         l.addWidget(QLabel("Recently opened files:"))
-        l.addWidget(QListWidget())
+        
+        self._file_list = QListWidget(self)
+        self._file_list.itemClicked.connect(self._on_file_clicked)
+        self._file_list.itemDoubleClicked.connect(self._on_file_clicked)
+        l.addWidget(self._file_list)
         frame.setLayout(l)
         layout.addWidget(frame, 3, 1)
-        
+        self._file_map = {}
+        self._read_recent_files()
+        
+    def _create_short_filename(original, max_len=40):
+        short = original
+        parts = original.split(os.sep)
+        print(parts)
+        return short
+        
+    def _read_recent_files(self):
+        settings = QSettings(cnst.organization, cnst.application)
+        filenames = settings.value(cnst.settings_recent_files_key, [])
+        del settings
+        
+        for f in filenames:
+            shortname = _create_short_filename(f, max_len=40)
+            self._file_map[f] =shortname
+            self._file_list.addItem(self._file_map[f])
+
+                
+    def _on_file_clicked(self, s):
+        print(s)
+    
+