tkinter

Author: furas

tkinter/label/label-FormatLabel/main.py

@@ -0,0 +1,49 @@
+import tkinter as tk
+
+# --- class ---
+
+class FormatLabel(tk.Label):
+    
+    def __init__(self, master=None, cnf={}, **kw):
+
+        # default values
+        self._format = '{}'  
+        self._textvariable = None
+        
+        # get `format` and remove from `kw` so later `Label.__init__` doesn't get it
+        if 'format' in kw:
+            self._format = kw['format']
+            del kw['format']
+            
+        # get `textvariable` and remove from `kw` so later `Label.__init__` doesn't get it
+        # Assign own function to format text in Label when variable change value
+        if 'textvariable' in kw:
+            self._textvariable = kw['textvariable']
+            self._textvariable.trace('w', self._update_text)
+            del kw['textvariable']
+            
+        # run `Label.__init__` without `format` and `textvariable`
+        super().__init__(master, cnf={}, **kw)
+
+        # update text after running `Label.__init__`
+        if self._textvariable:
+            self._update_text(self._textvariable, '', 'w')
+        
+    def _update_text(self, a, b, c):
+        """update text in label when variable change value"""
+        #print(f'|{a}|{b}|{c}|')
+        self["text"] = self._format.format(self._textvariable.get())
+        
+# --- main ---
+
+root = tk.Tk()
+
+myvar = tk.DoubleVar(value=0.05)
+
+label = FormatLabel(root, textvariable=myvar, format="Today: {:.0%} and growing")
+#label = FormatLabel(root, textvariable=myvar, format="{:.0%}")
+label.pack()
+
+myvar.set(0.1)
+
+root.mainloop()

tkinter/splash-screen/main.py

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+#!/usr/bin/env python3 
+
+# date: 2019.12.11
+
+import tkinter as tk
+
+WIDTH = 800
+HEIGHT = 600
+root = tk.Tk()
+
+
+screen_width = root.winfo_screenwidth()
+screen_height = root.winfo_screenheight()
+x = (screen_width-WIDTH)//2
+y = (screen_height-HEIGHT)//2
+root.geometry('{}x{}+{}+{}'.format(WIDTH, HEIGHT, x, y))
+
+root.overrideredirect(True) # borderless window, can't be close and it is always on top
+#root.update_idletasks()    # DON'T need it but if it is needed then can't be before `overrideredirect()`
+
+button = tk.Button(root, text='QUIT', command=root.destroy)
+button.place(relx=.5, rely=0.5, anchor='center')
+
+root.mainloop()
+

tkinter/text/align-left-right-chat/main-window-create.py

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+#!/usr/bin/env python3 
+
+# date: 2019.12.14
+# 
+
+import tkinter as tk 
+import tkinter.scrolledtext as ScrolledText
+
+root = tk.Tk()
+#text_widget = tk.Text()
+text_widget = ScrolledText.ScrolledText()
+text_widget.pack(fill='both', expand=True)
+
+label1 = tk.Label(text_widget, text="Hello\nWorld!!!", background='#d0ffff', justify='left', padx=10, pady=5)
+label2 = tk.Label(text_widget, text="Hello\nWorld!!!", background='#ffffd0', justify='left', padx=10, pady=5)
+label3 = tk.Label(text_widget, text="Hello\nWorld!!!", background='#d0ffff', justify='left', padx=10, pady=5)
+
+text_widget.tag_configure('tag-left', justify='left')
+text_widget.tag_configure('tag-right', justify='right')
+
+
+text_widget.insert('end', '\n')
+text_widget.window_create('end', window=label1)
+
+text_widget.insert('end', '\n ', 'tag-right') # space to move right Label
+text_widget.window_create('end', window=label2)
+
+text_widget.insert('end', '\n')
+text_widget.window_create('end', window=label3)
+
+root.mainloop()

tkinter/text/align-left-right-chat/main.py

@@ -0,0 +1,22 @@
+#!/usr/bin/env python3 
+
+# date: 2019.12.14
+# 
+
+import tkinter as tk 
+import tkinter.scrolledtext as ScrolledText
+
+root = tk.Tk()
+#text_widget = tk.Text()
+text_widget = ScrolledText.ScrolledText()
+text_widget.pack(fill='both', expand=True)
+
+text_widget.tag_configure('tag-center', justify='center')
+text_widget.tag_configure('tag-left', justify='left')
+text_widget.tag_configure('tag-right', justify='right', background='red')
+
+text_widget.insert('end', 'Hello\nWorld!!!\n', 'tag-center')
+text_widget.insert('end', 'Hello\nWorld!!!\n', 'tag-left')
+text_widget.insert('end', 'Hello\nWorld!!!\n', 'tag-right')
+
+root.mainloop()