add spreadsheet app tkinter tutorial

Author: x4nth055

Diff for: README.md

@@ -231,5 +231,6 @@ This is a repository of all the tutorials of [The Python Code](https://www.thepy
     - [How to Make a Markdown Editor using Tkinter in Python](https://www.thepythoncode.com/article/markdown-editor-with-tkinter-in-python). ([code](gui-programming/markdown-editor))
     - [How to Build a GUI Currency Converter using Tkinter in Python](https://www.thepythoncode.com/article/currency-converter-gui-using-tkinter-python). ([code](gui-programming/currency-converter-gui/))
     - [How to Detect Gender by Name using Python](https://www.thepythoncode.com/article/gender-predictor-gui-app-tkinter-genderize-api-python). ([code](gui-programming/genderize-app))
+    - [How to Build a Spreadsheet App with Tkinter in Python](https://www.thepythoncode.com/article/spreadsheet-app-using-tkinter-in-python). ([code](gui-programming/spreadsheet-app))
 
 For any feedback, please consider pulling requests.

Diff for: gui-programming/spreadsheet-app/README.md

@@ -0,0 +1 @@
+# [How to Build a Spreadsheet App with Tkinter in Python](https://www.thepythoncode.com/article/spreadsheet-app-using-tkinter-in-python)

Diff for: gui-programming/spreadsheet-app/spreadsheet_app.py

@@ -0,0 +1,126 @@
+# Imports
+from tkinter import *
+import string
+import sys
+import ctypes
+
+# Increase Dots Per inch so it looks sharper
+ctypes.windll.shcore.SetProcessDpiAwareness(True)
+
+# Define X and Y Axis Lists
+xAxis = string.ascii_lowercase[0:7]
+yAxis = range(0, 12)
+
+# Cells will hold the strings vars and the lables 
+cells = {}
+
+# Open the content of the given file
+# if one was provided and save it as a two 
+# dimensional list.
+CsvContent = ''
+if len(sys.argv) > 1:
+    with open(sys.argv[1], 'r') as f:
+        CsvContent = f.read().split('\n')
+        for i, layer in enumerate(CsvContent):
+            CsvContent[i] = layer.split(',')
+
+# Make a new Top Level Element (Window)
+root = Tk()
+
+# Set the the title to also mention the given file name
+# if there is one
+title = "Spreadsheet App" if CsvContent == '' else f"Spreadsheet App - {sys.argv[1]}"
+root.title(title)
+
+# Evaluating a cell
+def evaluateCell(cellId, *i):
+
+    # Get the content from the string var
+    # and make it lowercase
+    content = cells[cellId][0].get()
+    content = content.lower()
+
+    # get the reference to the label
+    label = cells[cellId][1]
+
+    # if the cell starts with a = it is evaluated
+    if content.startswith('='):
+
+        # Loop through all cells ...
+        for cell in cells:
+
+            # ... and see if their name appears in this cell
+            if cell in content.lower():
+
+                # if it is then replace the name occurences 
+                # with the evaluated content from there.
+                content = content.replace(cell, str(evaluateCell(cell)))
+
+        # Get the content without the = and try to evaluate it
+        content = content[1:]
+        try:
+            content = eval(content)
+        except:
+            content = 'NAN'
+        label['text'] = content
+        return content
+
+    # If not, the label just shows the content
+    else:
+        label['text'] = content
+        return content
+
+# Call the eval function for every cell every ten milliseconds.
+def updateAllCells():
+
+    # Call it again
+    root.after(10, updateAllCells)
+
+    # Loop through all cells
+    for cell in cells:
+        evaluateCell(cell)
+
+
+# Display the Y axis lables
+for y in yAxis:
+    label = Label(root, text = y, width=5, background='white')
+    label.grid(row=y + 1, column=0)
+
+# Display the X axis lables with enumerate
+for i, x in enumerate(xAxis):
+    label = Label(root, text = x, width=35, background='white')
+    label.grid(row=0, column=i + 1, sticky='n')
+
+
+# Display the Cells, by using a nested loop
+for y in yAxis:
+    for xcoor, x in enumerate(xAxis):
+
+        # Generate a Unique ID for the cell with the coordinates
+        id = f'{x}{y}'
+
+        # Make String Var associated with the Cell
+        var = StringVar(root, '', id)
+
+        # Make Entry and label, offset each axis by one because of the lables
+        e = Entry(root, textvariable=var, width=30)
+        e.grid(row=y + 1, column=xcoor + 1)
+
+        label = Label(root, text = '', width=5)
+        label.grid(row=y + 1, column=xcoor + 1, sticky='e')
+
+        # Save the string var and a reference to the lables in the dictionary
+        cells[id] = [var, label]
+
+        # Insert CSV content if it possible
+        if CsvContent != '':
+            try:
+                var.set(CsvContent[y][xcoor])
+            except:
+                pass
+
+# Start the updating Process
+updateAllCells()
+
+# Run the Mainloop
+root.mainloop()