WIP V3

archive/todo/data.db

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+[[false, "My first todo"], [true, "My second todo"], [true, "Another todo"], [false, "as"]]

archive/todo/mainwindow.ui

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+<?xml version="1.0" encoding="UTF-8"?>
+<ui version="4.0">
+ <class>MainWindow</class>
+ <widget class="QMainWindow" name="MainWindow">
+  <property name="geometry">
+   <rect>
+    <x>0</x>
+    <y>0</y>
+    <width>275</width>
+    <height>314</height>
+   </rect>
+  </property>
+  <property name="windowTitle">
+   <string>Todo</string>
+  </property>
+  <widget class="QWidget" name="centralwidget">
+   <layout class="QVBoxLayout" name="verticalLayout">
+    <item>
+     <widget class="QListView" name="todoView">
+      <property name="selectionMode">
+       <enum>QAbstractItemView::SingleSelection</enum>
+      </property>
+     </widget>
+    </item>
+    <item>
+     <widget class="QWidget" name="widget" native="true">
+      <layout class="QHBoxLayout" name="horizontalLayout">
+       <item>
+        <widget class="QPushButton" name="deleteButton">
+         <property name="text">
+          <string>Delete</string>
+         </property>
+        </widget>
+       </item>
+       <item>
+        <widget class="QPushButton" name="completeButton">
+         <property name="text">
+          <string>Complete</string>
+         </property>
+        </widget>
+       </item>
+      </layout>
+     </widget>
+    </item>
+    <item>
+     <widget class="QLineEdit" name="todoEdit"/>
+    </item>
+    <item>
+     <widget class="QPushButton" name="addButton">
+      <property name="text">
+       <string>Add Todo</string>
+      </property>
+     </widget>
+    </item>
+   </layout>
+  </widget>
+  <widget class="QMenuBar" name="menubar">
+   <property name="geometry">
+    <rect>
+     <x>0</x>
+     <y>0</y>
+     <width>275</width>
+     <height>22</height>
+    </rect>
+   </property>
+  </widget>
+  <widget class="QStatusBar" name="statusbar"/>
+ </widget>
+ <resources/>
+ <connections/>
+</ui>

archive/todo/todo.py

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+import sys
+import datetime
+import json
+from PyQt5 import QtCore, QtGui, QtWidgets, uic
+from PyQt5.QtCore import Qt
+
+
+qt_creator_file = "mainwindow.ui"
+Ui_MainWindow, QtBaseClass = uic.loadUiType(qt_creator_file)
+tick = QtGui.QImage('tick.png')
+
+
+class TodoModel(QtCore.QAbstractListModel):
+    def __init__(self, *args, todos=None, **kwargs):
+        super(TodoModel, self).__init__(*args, **kwargs)
+        self.todos = todos or []
+        
+    def data(self, index, role):
+        if role == Qt.DisplayRole:
+            _, text = self.todos[index.row()]
+            return text
+        
+        if role == Qt.DecorationRole:
+            status, _ = self.todos[index.row()]
+            if status:
+                return tick
+
+    def rowCount(self, index):
+        return len(self.todos)
+
+    def flags(self, index):
+        print(datetime.datetime.now().time().strftime("%H:%M:%S"))
+        return super().flags(index)
+
+
+class MainWindow(QtWidgets.QMainWindow, Ui_MainWindow):
+    def __init__(self):
+        QtWidgets.QMainWindow.__init__(self)
+        Ui_MainWindow.__init__(self)
+        self.setupUi(self)
+        self.model = TodoModel()
+        self.load()
+        self.todoView.setModel(self.model)
+        self.addButton.pressed.connect(self.add)
+        self.deleteButton.pressed.connect(self.delete)
+        self.completeButton.pressed.connect(self.complete)
+
+    def add(self):
+        """
+        Add an item to our todo list, getting the text from the QLineEdit .todoEdit
+        and then clearing it.
+        """
+        text = self.todoEdit.text()
+        if text: # Don't add empty strings.
+            # Access the list via the model.
+            self.model.todos.append((False, text))
+            # Trigger refresh.        
+            self.model.layoutChanged.emit()
+            # Empty the input
+            self.todoEdit.setText("")
+            self.save()
+        
+    def delete(self):
+        indexes = self.todoView.selectedIndexes()
+        if indexes:
+            # Indexes is a list of a single item in single-select mode.
+            index = indexes[0]
+            # Remove the item and refresh.
+            del self.model.todos[index.row()]
+            self.model.layoutChanged.emit()
+            # Clear the selection (as it is no longer valid).
+            self.todoView.clearSelection()
+            self.save()
+            
+    def complete(self):
+        indexes = self.todoView.selectedIndexes()
+        if indexes:
+            index = indexes[0]
+            row = index.row()
+            status, text = self.model.todos[row]
+            self.model.todos[row] = (True, text)
+            # .dataChanged takes top-left and bottom right, which are equal 
+            # for a single selection.
+            self.model.dataChanged.emit(index, index)
+            # Clear the selection (as it is no longer valid).
+            self.todoView.clearSelection()
+            self.save()
+    
+    def load(self):
+        try:
+            with open('data.db', 'r') as f:
+                self.model.todos = json.load(f)
+        except Exception:
+            pass
+
+    def save(self):
+        with open('data.db', 'w') as f:
+            data = json.dump(self.model.todos, f)
+
+
+app = QtWidgets.QApplication(sys.argv)
+window = MainWindow()
+window.show()
+app.exec_()
+
+