toDo-App.py

# ################################################
# todo application
# > Enter your Tasks
# > Save your Tasks
# > Delete your Tasks
# > Load your saved Tasks
# -------------------------------By: Anupam Sharma
# ################################################

# Importing modules required in this project
# using --- PyQt6 ---
import sys
import time
import os
from PyQt6.QtCore import QThread, QSize, Qt, pyqtSignal
from PyQt6.QtWidgets import QApplication, QListWidget, QAbstractItemView, QListWidgetItem, QWidget, QLineEdit, QHBoxLayout, QVBoxLayout, QLabel, QPushButton
from PyQt6.QtGui import QIcon, QCursor


# --------Thread class---------------#
class WorkerThread(QThread):
    status = pyqtSignal(str)

    def run(self):
        time.sleep(2)
        self.status.emit('...')
        print('...')


class todo(QWidget):
    def __init__(self):
        super().__init__()

        # adding logo of the window
        self.setWindowIcon(QIcon('icons/icon.png'))

        # setting the title of the window
        self.setWindowTitle('ToDo List')

        # fixed size window
        self.setFixedSize(350, 480)

        # defining layouts
        horizontalLayout = QHBoxLayout()
        horizontalLayoutforbutton = QHBoxLayout()
        verticalLayout = QVBoxLayout()

        # label widget
        label = QLabel('To Do''\'s')
        label.setObjectName('header')
        status = QLabel('Status:')
        status.setObjectName('status')
        self.toast = QLabel('...')
        #self.toast.setAlignment(Qt.Alignment.AlignCenter)
        self.toast.setObjectName('toast')

        # listwidget
        self.list = QListWidget()
        #self.list.setAlternatingRowColors(True)
        self.list.setAutoScroll(True)
        self.list.setWordWrap(True)
        # setting selection mode property
        self.list.setSelectionMode(QAbstractItemView.SelectionMode.MultiSelection)
        self.list.itemClicked.connect(self.item)

        # Textbox widget
        self.textbox = QLineEdit(self)
        self.textbox.setPlaceholderText('Take a note!')
        self.textbox.setFocus()
        self.textbox.setCursor(QCursor(Qt.CursorShape.IBeamCursor))

        # Add button widget
        btn_addTask = QPushButton('Add Task')
        btn_addTask.clicked.connect(self.addTask)
        #self.btn_addTask.setIcon(QIcon('icons/plus.png'))
        btn_addTask.setObjectName('addButton')
        btn_addTask.setCursor(QCursor(Qt.CursorShape.PointingHandCursor))

        # Delete button widget
        btn_deleteTask = QPushButton()
        btn_deleteTask.clicked.connect(self.deleteT)
        btn_deleteTask.setIcon(QIcon('icons/trash-regular.png'))
        btn_deleteTask.setIconSize(QSize(20, 20))
        btn_deleteTask.setToolTip('Delete selected task')
        btn_deleteTask.setObjectName('deleteButton')
        btn_deleteTask.setCursor(QCursor(Qt.CursorShape.PointingHandCursor))

        # Save button widget
        btn_saveTask = QPushButton()
        btn_saveTask.clicked.connect(self.saveT)
        btn_saveTask.setIcon(QIcon('icons/save-regular.png'))
        btn_saveTask.setIconSize(QSize(20, 20))
        btn_saveTask.setToolTip('Save Your List')
        btn_saveTask.setObjectName('saveButton')
        btn_saveTask.setCursor(QCursor(Qt.CursorShape.PointingHandCursor))

        # Load button widget
        btn_loadTask = QPushButton()
        btn_loadTask.clicked.connect(self.loadTask)
        btn_loadTask.setIcon(QIcon('icons/spreadsheet-regular.png'))
        btn_loadTask.setIconSize(QSize(20, 20))
        btn_loadTask.setToolTip('Load previously saved List')
        btn_loadTask.setObjectName('loadButton')
        btn_loadTask.setCursor(QCursor(Qt.CursorShape.PointingHandCursor))

        # ClearAll button widget
        btn_clearAll = QPushButton('Clear All')
        btn_clearAll.clicked.connect(self.clearAllTask)
        btn_clearAll.setObjectName('clearAllButton')
        btn_clearAll.setCursor(QCursor(Qt.CursorShape.PointingHandCursor))

        # setting Layouts
        verticalLayout.addWidget(label)
        horizontalLayout.addWidget(status)
        horizontalLayout.addWidget(self.toast, 1)
        horizontalLayout.addWidget(btn_loadTask)
        horizontalLayout.addWidget(btn_saveTask)
        horizontalLayout.addWidget(btn_deleteTask)
        verticalLayout.addLayout(horizontalLayout)
        verticalLayout.addWidget(self.list)
        verticalLayout.addWidget(self.textbox)
        horizontalLayoutforbutton.addWidget(btn_clearAll)
        horizontalLayoutforbutton.addWidget(btn_addTask)
        verticalLayout.addLayout(horizontalLayoutforbutton)
        self.setLayout(verticalLayout)



    # Set Toast when item is selected from the list
    def item(self):
        if self.list.selectedItems():
            self.toast.setText('Item Selected')
        else:
            self.toast.setText('...')




    # Event handling method when any key is pressed
    def keyPressEvent(self, event):
        #print(event.key())
        self.textbox.setFocus()

        # when user press enter, it automatically add func() to add task in the list
        if event.key() == 16777220 or event.key() == 16777221:
            self.addTask()




    # clear listwidget and linedit
    def clearAllTask(self):
        self.list.clear()
        self.textbox.clear()
        self.toast.setText('Reset')
        self.ThreadClass()



    # Adding listItem into the listwidget
    def addTask(self):
        task = self.textbox.text()
        #print(len(task))
        if task != "":
            self.list.addItem(task)
            self.textbox.clear()
            self.toast.setText('Item Added')
            self.ThreadClass()
        else:
            self.toast.setText('Add Item first')
            self.toast.setStyleSheet('''color:   #d9534f; ''')
            self.ThreadClass()




    # Delete the selected listItem
    def deleteT(self):
        if(self.list.selectedItems()):
            for i in self.list.selectedItems():
                task_index = self.list.row(i)
                print(self.list.item(task_index).text())
                self.list.takeItem(task_index)
                self.toast.setText('Item deleted.')
            self.ThreadClass()
        else:
            self.toast.setText('Select! item')
            self.toast.setStyleSheet('''color:  #d9534f;''')
            self.ThreadClass()




    # Save the selected listItem
    def saveT(self):
        if(self.list.selectedItems()):
            with open('load.txt', 'a+') as file:

                # getting the current time
                current_time = time.asctime(time.localtime(time.time()))
                print(self.list.count())
                for i in reversed(self.list.selectedItems()):
                    timestamp = '\n------------ {}'.format(current_time)
                    task_index = self.list.row(i)
                    strr = self.list.item(task_index).text()
                    
                    # concatinate time after the list item
                    strr = strr[0:] + timestamp

                    # replacing '\n' (new line) with symbol '$$' in the list item
                    strr = strr.replace('\n', '$$')
                    file.write(strr + '\n')
                
            self.toast.setText('Task saved')
            self.ThreadClass()

        else:
            self.toast.setText('Select! item')
            self.toast.setStyleSheet('''color:  #d9534f;''')
            self.ThreadClass()




    # Load the Saved task from the file named: load.txt
    def loadTask(self):
        try:
            # check the file size or file not exist throws an exception
            if os.stat('load.txt').st_size != 0:
                self.list.clear()

                # reading the item one by one
                with open('load.txt', 'r') as file:
                    for i in file.readlines():

                        # replacing '$$' with '\n' in the list item
                        i = i.replace('$$', '\n')

                        self.list.addItem(i)

                self.toast.setText('Task Loaded')
                self.ThreadClass()
            else:
                self.toast.setText('Task List empty!')
                self.toast.setStyleSheet('''color: #d9534f;''')
                self.ThreadClass()

        except:
            file = open('load.txt', 'a+')
            print('file created !')
            self.loadTask()



    # Default Toast Message
    def toast_msg(self, msg):
        self.toast.setText(msg)
        self.toast.setStyleSheet('''color: #1a73e8;''')



    # Thread function calling
    def ThreadClass(self):
        self.worker = WorkerThread()
        self.worker.start()
        self.worker.status.connect(self.toast_msg)




#------------------Main---------------------#
app = QApplication(sys.argv)
app.setStyleSheet('''
    *{
        background-color:        #ffffff;
        font-family:            Century Gothic;
    }
    
    #header{
       font-size:               30px; 
       /*font-family:             Mistral;*/
       color:                   #787c80;
       margin:                  0px  5px;
    }

    #toast, #status{
        font-size:              12px;
        color:                  #1a73e8;
        font-weight:            bold;
        margin-left:            5px;
    }

    QToolTip { 
        color:                  #ffffff;
        background-color:       #1a73e8;
        padding:                10px; 
        outline:                0;
        border:                 0;
        /*opacity:              200;*/ 
    }
 
    QListWidget{
        background-color:       rgba(241, 243, 244, 1);
        border:                 1px solid rgba(241, 243, 244,1);
        border-radius:          8px;
        padding:                0.8em 0.5em 0.8em 0.5em ;
        outline:                0;
        font-size:              15px;
        margin:                 2px 5px 8px 5px;
    }
    QListWidget::item {
        background-color:       #ffffff;
        /*background:           qlineargradient( x1:0 y1:0, x2:1 y2:0, stop:0 #cccccc, stop:1 #fcfcfc);*/
        border-radius:          8px;
        margin-top:             0.4em;
        padding:                0.5em;       
    }
    QListWidget::item:selected {
        background-color:       #d2e3fc;
        border :                none;
        color:                  #0275d8;
    }
 
    #deleteButton{
        border-radius:          5px;
        max-width:              2em;
        padding:                0.2em;
        margin-left:            0;
        margin-right:           5px;
    }
    #deleteButton::hover, #loadButton::hover, #saveButton::hover{
        background-color:       #f0f0f0;
    }
    #deleteButton::pressed, #loadButton::pressed,  #saveButton::pressed{
        background-color:       #e0f0fd;
    }

    #loadButton{
        border-radius:          5px;
        max-width:              2em;
        padding:                0.2em;
    }

    #saveButton{
        border-radius:          5px;
        /*background-color:     #0275d8;*/
        max-width:              2em;
        margin-left:            0;
        padding:                0.2em;
    }

    #addButton, #clearAllButton{
        padding:                1em;
        background-color:       #1a73e8;
        margin-bottom:          5px;
        margin-top:             3px;  
    }
    #clearAllButton{
        margin-left:            5px;
    }
    #addButton{
        margin-right:           5px;
    }

    QPushButton{
        font-size:              15px;
        border-radius:          8px;
        color:                  #ffffff;
        font-weight:            bold;
    }  
    QPushButton::hover, #addButton::hover, #clearAllButton::hover{
        background-color:       #1967d2;
    }
    QPushButton::pressed, #addButton::pressed, #clearAllButton::pressed{
        background-color:       #185abc;
    }

    QLineEdit{
        background-color:       rgba(241, 243, 244, 1);
        border:                 1px solid rgba(241, 243, 244,1);
        border-radius:          8px;
        min-height:             2em;
        padding:                0.5em;
        font-size:              16px;
        margin:                 5px 5px 0px 5px;
    }
    
    QScrollBar{
        border:                 none;
        background-color:       rgba(241, 243, 244, 1);  
    }
    QScrollBar:vertical {              
        width:                  18px;
    }
    QScrollBar:horizontal {              
        height:                 10px;     
    }
    QScrollBar::handle:vertical{
        background :            #CFD1D0;
        border-radius:          5px;   
        margin-left:            0.5em; 
    }
    QScrollBar::handle:horizontal{
        background :            #CFD1D0;
        border-radius:          5px;    
    }
    QScrollBar::add-line:horizontal {
        border:                 none;
        background:             none;
        width:                  20px;
        subcontrol-position:    right;
        subcontrol-origin:      margin;
    }
    QScrollBar::add-line:vertical {
        border:                 none;
        background:             none;
        height:                 20px;
        margin-left:            5px;
        subcontrol-position:    top;
        subcontrol-origin:      margin;
    }
    QScrollBar::sub-line:horizontal {
        border:                 none;
        background:             none;
        width:                  20px;
        subcontrol-position:    left;
        subcontrol-origin:      margin;
    }
    QScrollBar::sub-line:vertical {
        border:                 none;
        background:             none;
        height:                 20px;
        subcontrol-position:    bottom;
        subcontrol-origin:      margin;
    }
    QScrollBar::add-page:horizontal, QScrollBar::sub-page:horizontal, QScrollBar::add-page:vertical, QScrollBar::sub-page:vertical {
        background:             none;
    } 
    ''')
window = todo()
window.show()
sys.exit(app.exec())