Merge pull request #567 from kaliappan01/markdown_viewer

all the required program files for uploaded for markdown Viewer

Author: pawangeek

markdown_viewer/README.md

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+#Markdown Viewer
+
+Markdown viewer using python tkinter library.  
+
+#modules used  
+
+- Tkinter
+- markdown2
+- tkhtmlview
+
+
+## Setup and activate virtual environment :  
+For Unix based systems please execute the following command to create venv and install requirements.
+```
+make init  
+source .venv/bin/activate  
+```
+For Windows based system
+```
+pip install -r /path/to/requirements.txt
+```
+
+## How to Use
+
+```
+python3 markdown_viewer.py
+```

markdown_viewer/makefile

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+VENV ?= .venv
+REQUIREMENTS_FILE ?= requirements.txt
+
+init:
+	python3 -m venv $(VENV)
+	$(VENV)/bin/python -m pip install --upgrade pip
+	if [ -f $(REQUIREMENTS_FILE) ]; \
+	    then $(VENV)/bin/python -m pip install -r $(REQUIREMENTS_FILE); \
+    fi

markdown_viewer/markdown_viewer.py

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+import tkinter as tk
+from tkinter import Tk
+from tkinter import font, filedialog, messagebox as mbox
+from markdown2 import Markdown
+from tkhtmlview import HTMLLabel
+
+
+class Window(tk.Frame):
+
+    def __init__(self, master=None):
+        tk.Frame.__init__(self, master)
+        self.master = master
+        self.font = font.Font(family='Helvetica', size=14)
+        self.init_window()
+
+    def openfile(self):
+        filename = \
+            filedialog.askopenfilename(filetypes=(('Markdown File',
+                                                   '*.md , *.mdown'),
+                                                  ('Text file', '*.txt')))
+        if filename:
+            try:
+                md2html = Markdown()
+                self.outputbox.set_html(md2html.convert(open(filename,
+                                                             'r').read()))
+            except Exception:
+                mbox.showerror('Error opening file',
+                               'The selected file cannot be opened !')
+
+    def init_window(self):
+        self.master.title('Mardown Viewer')
+        self.pack(fill=tk.BOTH, expand=1)
+
+        self.mainmenu = tk.Menu(self)
+        self.filemenu = tk.Menu(self.mainmenu)
+        self.filemenu.add_command(label='Open', command=self.openfile)
+        self.filemenu.add_separator()
+        self.filemenu.add_command(label='Exit', command=self.quit)
+        self.mainmenu.add_cascade(label='File', menu=self.filemenu)
+        self.master.config(menu=self.mainmenu)
+
+        self.outputbox = HTMLLabel(self, width='1', background='white',
+                                   html='<h1>Welcome</h1>')
+        self.outputbox.pack(fill=tk.BOTH, expand=1, side=tk.RIGHT)
+        self.outputbox.fit_height()
+
+
+root = Tk()
+root.geometry('750x600')
+app = Window(master=root)
+app.mainloop()

markdown_viewer/requirements.txt

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+certifi==2021.5.30
+charset-normalizer==2.0.6
+flake8==3.9.2
+idna==3.2
+markdown2==2.4.1
+mccabe==0.6.1
+Pillow==8.3.2
+pycodestyle==2.7.0
+pyflakes==2.3.1
+requests==2.26.0
+tkhtmlview==0.1.0.post1
+urllib3==1.26.7