Python tkinter.E Examples

def create_statusbar(self):
        statusBar = ttk.Frame(self.master)
        statusLabel = ttk.Label(statusBar, textvariable=self.statusText)
        statusLabel.grid(column=0, row=0, sticky=(tk.W, tk.E))
        self.modifiedLabel = ttk.Label(statusBar, relief=tk.SUNKEN,
                anchor=tk.CENTER)
        self.modifiedLabel.grid(column=1, row=0, pady=2, padx=1)
        TkUtil.Tooltip.Tooltip(self.modifiedLabel,
                text="MOD if the text has unsaved changes")
        self.positionLabel = ttk.Label(statusBar, relief=tk.SUNKEN,
                anchor=tk.CENTER)
        self.positionLabel.grid(column=2, row=0, sticky=(tk.W, tk.E),
                pady=2, padx=1)
        TkUtil.Tooltip.Tooltip(self.positionLabel,
                text="Current line and column position")
        ttk.Sizegrip(statusBar).grid(row=0, column=4, sticky=(tk.S, tk.E))
        statusBar.columnconfigure(0, weight=1)
        statusBar.grid(row=2, column=0, columnspan=3, sticky=(tk.W, tk.E))
        self.set_status_text("Start typing to create a new document or "
                "click File→Open") 

def __init__(self, *args, **kwargs):
        super().__init__(*args, **kwargs)

        self.title("ABQ Data Entry Application")
        self.resizable(width=False, height=False)

        ttk.Label(
            self,
            text="ABQ Data Entry Application",
            font=("TkDefaultFont", 16)
        ).grid(row=0)

        self.recordform = DataRecordForm(self)
        self.recordform.grid(row=1, padx=10)

        self.savebutton = ttk.Button(self, text="Save", command=self.on_save)
        self.savebutton.grid(sticky=tk.E, row=2, padx=10)

        # status bar
        self.status = tk.StringVar()
        self.statusbar = ttk.Label(self, textvariable=self.status)
        self.statusbar.grid(sticky=(tk.W + tk.E), row=3, padx=10)

        self.records_saved = 0 

def layout_widgets(self):
        pad = dict(padx=PAD, pady=PAD)
        padWE = dict(sticky=(tk.W, tk.E), **pad)
        self.sourceLabel.grid(row=0, column=0, sticky=tk.W, **pad)
        self.sourceEntry.grid(row=0, column=1, columnspan=3, **padWE)
        self.sourceButton.grid(row=0, column=4, **pad)
        self.targetLabel.grid(row=1, column=0, sticky=tk.W, **pad)
        self.targetEntry.grid(row=1, column=1, columnspan=3, **padWE)
        self.targetButton.grid(row=1, column=4, **pad)
        self.dimensionLabel.grid(row=2, column=0, sticky=tk.W, **pad)
        self.dimensionCombobox.grid(row=2, column=1, **padWE)
        self.helpButton.grid(row=2, column=3, **pad)
        self.scaleButton.grid(row=2, column=4, **pad)
        self.aboutButton.grid(row=3, column=3, **pad)
        self.quitButton.grid(row=3, column=4, **pad)
        self.statusLabel.grid(row=3, column=0, columnspan=3, **padWE)
        self.grid() 

def create_layout(self):
        pad = dict(padx=PAD, pady=PAD)
        padWE = dict(sticky=(tk.W, tk.E), **pad)
        self.findLabel.grid(row=0, column=0, sticky=tk.W, **pad)
        self.findEntry.grid(row=0, column=1, **padWE)
        self.replaceLabel.grid(row=1, column=0, sticky=tk.W, **pad)
        self.replaceEntry.grid(row=1, column=1, **padWE)
        self.caseSensitiveCheckbutton.grid(row=2, column=0, columnspan=2,
                **padWE)
        self.wholeWordsCheckbutton.grid(row=3, column=0, columnspan=2,
                **padWE)
        self.findButton.grid(row=0, column=2, **padWE)
        self.replaceButton.grid(row=1, column=2, **padWE)
        self.closeButton.grid(row=2, column=2, **padWE)
        self.extendButton.grid(row=3, column=2, **padWE)
        self.grid_columnconfigure(1, weight=1)
        self.minsize(180, 90)
        self.maxsize(600, 150)
        self.geometry("+{}+{}".format(self.master.winfo_rootx() + 200,
                self.master.winfo_rooty() - 30)) 

def create_layout(self):
        pad = dict(padx=PAD, pady=PAD)
        padWE = dict(sticky=(tk.W, tk.E), **pad)
        self.findLabel.grid(row=0, column=0, sticky=tk.W, **pad)
        self.findEntry.grid(row=0, column=1, **padWE)
        self.replaceLabel.grid(row=1, column=0, sticky=tk.W, **pad)
        self.replaceEntry.grid(row=1, column=1, **padWE)
        self.caseSensitiveCheckbutton.grid(row=2, column=0, columnspan=2,
                **padWE)
        self.wholeWordsCheckbutton.grid(row=3, column=0, columnspan=2,
                **padWE)
        self.findButton.grid(row=0, column=2, **padWE)
        self.replaceButton.grid(row=1, column=2, **padWE)
        self.closeButton.grid(row=2, column=2, **padWE)
        self.extendButton.grid(row=3, column=2, **padWE)
        self.grid_columnconfigure(1, weight=1)
        self.minsize(180, 90)
        self.maxsize(600, 150)
        self.geometry("+{}+{}".format(self.master.winfo_rootx() + 200,
                self.master.winfo_rooty() - 30)) 

def create_widgets(self, names):
        ''' Creates appropriate widgets.

            Args:
                names (list of str): list of available sheet names.
        '''
        sheet_name_lbl = Label(self,
                               text='Choose sheet name where data is stored:')
        sheet_name_lbl.grid(sticky=N+W, padx=5, pady=5)
        sheet_names_box = Combobox(self, state="readonly", width=20,
                                   textvariable=self.sheet_name_str,
                                   values=names)
        sheet_names_box.current(0)
        sheet_names_box.grid(row=1, column=0, columnspan=2,
                             sticky=N+W, padx=5, pady=5)
        ok_btn = Button(self, text='OK', command=self.ok)
        ok_btn.grid(row=2, column=0, sticky=N+E, padx=5, pady=5)
        ok_btn.bind('<Return>', self.ok)
        ok_btn.focus()
        cancel_btn = Button(self, text='Cancel', command=self.cancel)
        cancel_btn.grid(row=2, column=1, sticky=N+E, padx=5, pady=5)
        cancel_btn.bind('<Return>', self.cancel) 

def create_window(self):
    self.root.grid_rowconfigure(1,weight=1)
    self.root.grid_columnconfigure(0,weight=1)
    self.img_label = tk.Label(self.root)
    self.img_label.configure(image=self.c_img)
    self.hist_label = tk.Label(self.root)
    self.hist_label.grid(row=0,column=0)
    #self.img_label.pack(fill=tk.BOTH)
    self.img_label.grid(row=1,column=0,
        rowspan=len(self.camera.settings_dict)+2, sticky=tk.N+tk.E+tk.S+tk.W)
    self.create_inputs()
    self.create_infos()
    self.img_label.bind('<Motion>', self.update_reticle)
    self.img_label.bind('<4>', self.zoom_in)
    self.img_label.bind('<5>', self.zoom_out)
    self.root.bind('<MouseWheel>', self.zoom)
    self.img_label.bind('<1>', self.start_move)
    self.img_label.bind('<B1-Motion>', self.move) 

def create_widgets(self):
        ''' Creates all widgets.
        '''
        self.grid_rowconfigure(0, weight=1)
        self.grid_columnconfigure(0, weight=1)

        xscrollbar = Scrollbar(self, orient=HORIZONTAL)
        xscrollbar.grid(row=1, column=0, sticky=E+W)

        yscrollbar = Scrollbar(self)
        yscrollbar.grid(row=0, column=1, sticky=N+S)

        self.text = Text(self, wrap=NONE,
                         xscrollcommand=xscrollbar.set,
                         yscrollcommand=yscrollbar.set)

        self.text.bind("<Control-Key-a>", self.select_all)
        self.text.bind("<Control-Key-A>", self.select_all)

        self.text.grid(row=0, column=0, sticky=N+S+E+W)

        xscrollbar.config(command=self.text.xview)
        yscrollbar.config(command=self.text.yview) 

def __init__(self, parent, text, textvariable, **kwargs):
        super().__init__(parent, **kwargs)
        self.label = tk.Label(self, 
                text=text,
                font=self.font,
                anchor=tk.E)
        
        self.entry = tk.Entry(self,
                textvariable=textvariable,
                font=self.font,
                width=len("$ 000.00"),
                state=tk.DISABLED,
                disabledforeground="black",
                disabledbackground="white")

        self.label.grid(row=0, column=0, sticky="nswe")
        self.entry.grid(row=0, column=1, sticky="nswe") 

def table(self, master, title, content, target=None, backgroundcolour="White", foregroundcolour="black", bordercolour="grey", borderwidth=1, fontstyle="DejaVuSans 18 normal"):
        # creates a table from a 2 dimensional array.  
        # master: = this represents the parent window
        # content: a 2 dimensional array containing the table contents
        # First column in the array must be the row id which is returned on a click event.  This will not be displayed in the table
        index = 0
        for i in range(len(content)): #Rows
            for j in range(len(content[i])):
                if j==0: 
                    index = content[i][j]
                else:
                    b = tk.Label(master, text=str(content[i][j]), background=backgroundcolour, foreground=foregroundcolour,padx=5, pady=10, highlightthickness=borderwidth, highlightbackground=bordercolour, font=fontstyle)
                    if (target is not None):
                        b.bind('<ButtonPress-1>', self.__row_pressed)  
                        b.bind('<ButtonRelease-1>', lambda event, arg1=index, arg2=target: self.__row_released(event, arg1, arg2))                 
                    b.grid(row=i, column=j-1, sticky=tk.N+tk.S+tk.E+tk.W)
        return 

def configure_treeview(self):
        self.treeview = ttk.Treeview(self)
        self.treeview['columns'] = ["id", "time", 'ms_level', 'precursor_mz', 'precursor_charge', 'activation']
        self.treeview.grid(row=2, column=0, sticky=tk.S + tk.W + tk.E + tk.N)

        self.treeview_scrollbar = ttk.Scrollbar(self, orient="vertical", command=self.treeview.yview)
        self.treeview_scrollbar.grid(row=2, column=0, sticky=tk.S + tk.E + tk.N)
        self.treeview.configure(yscrollcommand=self.treeview_scrollbar.set)

        self.treeview.heading('id', text="Scan ID")
        self.treeview.heading('#0', text='Index')
        self.treeview.heading("time", text='Time (min)')
        self.treeview.heading("ms_level", text='MS Level')
        self.treeview.heading("precursor_mz", text='Precursor M/Z')
        self.treeview.heading("precursor_charge", text='Precursor Z')
        self.treeview.heading("activation", text='Activation')
        self.treeview.column("#0", width=75)
        self.treeview.column("ms_level", width=75)
        self.treeview.column("time", width=75)
        self.treeview.column("precursor_mz", width=100)
        self.treeview.column("precursor_charge", width=100)
        self.treeview.bind("<<TreeviewSelect>>", self.on_row_click) 

def __init__(self, parent, label='', input_class=ttk.Entry,
                 input_var=None, input_args=None, label_args=None,
                 **kwargs):
        super().__init__(parent, **kwargs)
        input_args = input_args or {}
        label_args = label_args or {}
        self.variable = input_var

        if input_class in (ttk.Checkbutton, ttk.Button, ttk.Radiobutton):
            input_args["text"] = label
            input_args["variable"] = input_var
        else:
            self.label = ttk.Label(self, text=label, **label_args)
            self.label.grid(row=0, column=0, sticky=(tk.W + tk.E))
            input_args["textvariable"] = input_var

        self.input = input_class(self, **input_args)
        self.input.grid(row=1, column=0, sticky=(tk.W + tk.E))
        self.columnconfigure(0, weight=1)
        self.error = getattr(self.input, 'error', tk.StringVar())
        self.error_label = ttk.Label(self, textvariable=self.error)
        self.error_label.grid(row=2, column=0, sticky=(tk.W + tk.E)) 

def configure_canvas(self):
        self.figure = Figure(dpi=100)
        self.canvas = FigureCanvasTkAgg(self.figure, master=self)
        self.axis = self.figure.add_subplot(111)
        self.canvas.draw()
        canvas_widget = self.canvas.get_tk_widget()
        canvas_widget.grid(row=0, column=0, sticky=tk.N + tk.W + tk.E + tk.S)
        self.canvas_cursor = Cursor(self.axis, tk.StringVar(master=self.root))
        self.canvas.mpl_connect('motion_notify_event', self.canvas_cursor.mouse_move)
        self.span = SpanSelector(
            self.axis, self.zoom, 'horizontal', useblit=True,
            rectprops=dict(alpha=0.5, facecolor='red'))
        self.mz_span = None
        self.scan = None
        self.annotations = []
        self.canvas.draw() 

def __init__(self, parent, *args, **kwargs):
        super().__init__(parent, *args, **kwargs)

        self.name = tk.StringVar()
        self.hello_string = tk.StringVar()
        self.hello_string.set("Hello World")

        name_label = ttk.Label(self, text="Name:")
        name_entry = ttk.Entry(self, textvariable=self.name)
        ch_button = ttk.Button(self, text="Change", command=self.on_change)
        hello_label = ttk.Label(self, textvariable=self.hello_string,
            font=("TkDefaultFont", 64), wraplength=600)

        # Layout form
        name_label.grid(row=0, column=0, sticky=tk.W)
        name_entry.grid(row=0, column=1, sticky=(tk.W + tk.E))
        ch_button.grid(row=0, column=2, sticky=tk.E)
        hello_label.grid(row=1, column=0, columnspan=3)
        self.columnconfigure(1, weight=1) 

def __init__(self, parent, label='', input_class=ttk.Entry,
                 input_var=None, input_args=None, label_args=None,
                 **kwargs):
        super().__init__(parent, **kwargs)
        input_args = input_args or {}
        label_args = label_args or {}
        self.variable = input_var

        if input_class in (ttk.Checkbutton, ttk.Button, ttk.Radiobutton):
            input_args["text"] = label
            input_args["variable"] = input_var
        else:
            self.label = ttk.Label(self, text=label, **label_args)
            self.label.grid(row=0, column=0, sticky=(tk.W + tk.E))
            input_args["textvariable"] = input_var

        self.input = input_class(self, **input_args)
        self.input.grid(row=1, column=0, sticky=(tk.W + tk.E))
        self.columnconfigure(0, weight=1) 

def create_widgets(self, weight_name):
        ''' Creates all widgets.
        '''
        constraints_lbl = Label(
            self, text='Enter {0} weight restrictions:'.format(
                weight_name))
        constraints_lbl.grid(padx=10, pady=2, sticky=N+W)
        examples_lbl = Label(self, text='e.g. {0}'.format(self.examples))
        examples_lbl.grid(row=1, column=0, padx=10, pady=5, sticky=N+W)

        errors_lbl = Label(self, textvariable=self.errors_strvar, 
                           foreground='red', anchor=W, justify=LEFT, 
                           wraplength=80)
        errors_lbl.grid(row=2, column=2, sticky=N+W, padx=5, pady=5)

        self.grid_rowconfigure(2, weight=1)
        self.grid_columnconfigure(0, weight=1)

        xscrollbar = Scrollbar(self, orient=HORIZONTAL)
        xscrollbar.grid(row=3, column=0, sticky=E+W)

        yscrollbar = Scrollbar(self)
        yscrollbar.grid(row=2, column=1, sticky=N+S)

        self.text = Text(self, wrap=NONE, width=TEXT_WIDTH_VAL,
                         height=TEXT_HEIGHT_VAL,
                         xscrollcommand=xscrollbar.set,
                         yscrollcommand=yscrollbar.set)

        self.text.grid(row=2, column=0, sticky=N+S+E+W)

        xscrollbar.config(command=self.text.xview)
        yscrollbar.config(command=self.text.yview) 

def add_column(self):
        ''' Adds one column to the end of the table.
        '''
        for i in range(self.nb_rows):
            grid_row_index = i + 2
            ent = self.create_entry_widget(self.frame_with_table)
            ent.grid(row=grid_row_index, column=self.nb_cols + 1,
                     sticky=N+S+E+W)
            self.cells[i].append(ent)
        self.nb_cols += 1
        self._update_scroll_region() 

def create_widgets(self):
        ''' Creates all widgets.
        '''
        self.columnconfigure(0, weight=1)
        self.rowconfigure(1, weight=1)

        validate_btn = Button(self, text='Validate weight restrictions',
                              command=self.on_validate_weights)
        validate_btn.grid(row=0, column=0, padx=10, pady=5, sticky=N+W)

        panel = LabelFrame(self, text='Weight restrictions')
        panel.columnconfigure(0, weight=1)
        panel.rowconfigure(0, weight=1)
        panel.grid(row=1, column=0,
                   padx=5, pady=5, sticky=E+W+S+N)

        weight_tab_main = VerticalScrolledFrame(panel)
        weight_tab_main.grid(row=0, column=0, sticky=E+W+S+N)
        weights_tab = weight_tab_main.interior

        self.abs_weights = TextForWeights(weights_tab, 'absolute',
                                          'Input1 <= 0.02',
                                          self.current_categories, self.params,
                                          'ABS_WEIGHT_RESTRICTIONS')
        self.abs_weights.grid(row=0, column=0, padx=10, pady=5, sticky=N+W)
        self.virtual_weights = TextForWeights(weights_tab, 'virtual',
                                              'Input1 >= 0.34',
                                              self.current_categories,
                                              self.params,
                                              'VIRTUAL_WEIGHT_RESTRICTIONS')
        self.virtual_weights.grid(row=1, column=0, padx=10, pady=5, sticky=N+W)
        self.price_ratio_weights = TextForWeights(weights_tab, 'price ratio',
                                                  'Input1/Input2 <= 5',
                                                  self.current_categories,
                                                  self.params,
                                                  'PRICE_RATIO_RESTRICTIONS',
                                                  True)
        self.price_ratio_weights.grid(row=2, column=0, padx=10, pady=5,
                                      sticky=N+W) 

def create_widgets(self):
        ''' Creates appropriate widgets on this frame.
        '''
        self.columnconfigure(0, weight=1)
        self.rowconfigure(3, weight=1)
        frame_for_save_btn = Frame(self)
        frame_for_save_btn.columnconfigure(1, weight=1)
        self.status_lbl = Label(frame_for_save_btn, text='')
        self.status_lbl.grid(row=0, column=1, sticky=N+W)
        save_solution_btn = Button(frame_for_save_btn, text='Save solution',
                                   command=self.on_save_solution)
        save_solution_btn.grid(row=1, column=0, sticky=W+N, padx=5, pady=5)
        self.progress_bar = Progressbar(frame_for_save_btn,
                                        mode='determinate', maximum=100)
        self.progress_bar.grid(row=1, column=1, sticky=W+E, padx=10, pady=5)

        frame_for_save_btn.grid(sticky=W+N+E+S, padx=5, pady=5)

        frame_for_btns = Frame(self)
        self._create_file_format_btn('*.xlsx', 1, frame_for_btns, 0)
        self._create_file_format_btn('*.xls', 2, frame_for_btns, 1)
        self._create_file_format_btn('*.csv', 3, frame_for_btns, 2)
        self.solution_format_var.set(1)

        frame_for_btns.grid(row=1, column=0, sticky=W+N+E+S, padx=5, pady=5)
        self.data_from_file_lbl = Label(self, text=TEXT_FOR_FILE_LBL, anchor=W,
                                        justify=LEFT,
                                        wraplength=MAX_FILE_PARAMS_LBL_LENGTH)
        self.data_from_file_lbl.grid(row=2, column=0, padx=5, pady=5,
                                     sticky=W+N)

        self.solution_tab = SolutionFrameWithText(self)
        self.solution_tab.grid(row=3, column=0, sticky=W+E+S+N, padx=5, pady=5) 

def do_layout(self):
        self.grid(sticky=tk.N + tk.W + tk.E + tk.S)
        tk.Grid.rowconfigure(self, 0, weight=1)
        tk.Grid.columnconfigure(self, 0, weight=1) 

def grid(self, sticky=(tk.E + tk.W), **kwargs):
        super().grid(sticky=sticky, **kwargs) 

def __init__(self, parent, label='', input_class=None,
                 input_var=None, input_args=None, label_args=None,
                 field_spec=None, **kwargs):
        super().__init__(parent, **kwargs)
        input_args = input_args or {}
        label_args = label_args or {}
        if field_spec:
            field_type = field_spec.get('type', FT.string)
            input_class = input_class or self.field_types.get(field_type)[0]
            var_type = self.field_types.get(field_type)[1]
            self.variable = input_var if input_var else var_type()
            # min, max, increment
            if 'min' in field_spec and 'from_' not in input_args:
                input_args['from_'] = field_spec.get('min')
            if 'max' in field_spec and 'to' not in input_args:
                input_args['to'] = field_spec.get('max')
            if 'inc' in field_spec and 'increment' not in input_args:
                input_args['increment'] = field_spec.get('inc')
            # values
            if 'values' in field_spec and 'values' not in input_args:
                input_args['values'] = field_spec.get('values')
        else:
            self.variable = input_var

        if input_class in (ttk.Checkbutton, ttk.Button, ttk.Radiobutton):
            input_args["text"] = label
            input_args["variable"] = self.variable
        else:
            self.label = ttk.Label(self, text=label, **label_args)
            self.label.grid(row=0, column=0, sticky=(tk.W + tk.E))
            input_args["textvariable"] = self.variable

        self.input = input_class(self, **input_args)
        self.input.grid(row=1, column=0, sticky=(tk.W + tk.E))
        self.columnconfigure(0, weight=1)
        self.error = getattr(self.input, 'error', tk.StringVar())
        self.error_label = ttk.Label(self, textvariable=self.error, **label_args)
        self.error_label.grid(row=2, column=0, sticky=(tk.W + tk.E)) 

def grid(self, sticky=(tk.E + tk.W), **kwargs):
        super().grid(sticky=sticky, **kwargs) 

def __init__(self, parent, label='', input_class=None,
                 input_var=None, input_args=None, label_args=None,
                 field_spec=None, **kwargs):
        super().__init__(parent, **kwargs)
        input_args = input_args or {}
        label_args = label_args or {}
        if field_spec:
            field_type = field_spec.get('type', FT.string)
            input_class = input_class or self.field_types.get(field_type)[0]
            var_type = self.field_types.get(field_type)[1]
            self.variable = input_var if input_var else var_type()
            # min, max, increment
            if 'min' in field_spec and 'from_' not in input_args:
                input_args['from_'] = field_spec.get('min')
            if 'max' in field_spec and 'to' not in input_args:
                input_args['to'] = field_spec.get('max')
            if 'inc' in field_spec and 'increment' not in input_args:
                input_args['increment'] = field_spec.get('inc')
            # values
            if 'values' in field_spec and 'values' not in input_args:
                input_args['values'] = field_spec.get('values')
        else:
            self.variable = input_var

        if input_class in (ttk.Checkbutton, ttk.Button, ttk.Radiobutton):
            input_args["text"] = label
            input_args["variable"] = self.variable
        else:
            self.label = ttk.Label(self, text=label, **label_args)
            self.label.grid(row=0, column=0, sticky=(tk.W + tk.E))
            input_args["textvariable"] = self.variable

        self.input = input_class(self, **input_args)
        self.input.grid(row=1, column=0, sticky=(tk.W + tk.E))
        self.columnconfigure(0, weight=1)
        self.error = getattr(self.input, 'error', tk.StringVar())
        self.error_label = ttk.Label(self, textvariable=self.error)
        self.error_label.grid(row=2, column=0, sticky=(tk.W + tk.E)) 

def grid(self, sticky=(tk.E + tk.W), **kwargs):
        super().grid(sticky=sticky, **kwargs) 

def __init__(self, *args, **kwargs):
        super().__init__(*args, **kwargs)

        # set the window properties
        self.title("Hello Tkinter")
        self.geometry("800x600")
        self.resizable(width=False, height=False)

        # Define the UI
        HelloView(self).grid(sticky=(tk.E + tk.W + tk.N + tk.S))
        self.columnconfigure(0, weight=1) 

def grid(self, sticky=(tk.E + tk.W), **kwargs):
        super().grid(sticky=sticky, **kwargs) 

def __init__(self, parent, label='', input_class=None,
                 input_var=None, input_args=None, label_args=None,
                 field_spec=None, **kwargs):
        super().__init__(parent, **kwargs)
        input_args = input_args or {}
        label_args = label_args or {}
        if field_spec:
            field_type = field_spec.get('type', FT.string)
            input_class = input_class or self.field_types.get(field_type)[0]
            var_type = self.field_types.get(field_type)[1]
            self.variable = input_var if input_var else var_type()
            # min, max, increment
            if 'min' in field_spec and 'from_' not in input_args:
                input_args['from_'] = field_spec.get('min')
            if 'max' in field_spec and 'to' not in input_args:
                input_args['to'] = field_spec.get('max')
            if 'inc' in field_spec and 'increment' not in input_args:
                input_args['increment'] = field_spec.get('inc')
            # values
            if 'values' in field_spec and 'values' not in input_args:
                input_args['values'] = field_spec.get('values')
        else:
            self.variable = input_var

        if input_class in (ttk.Checkbutton, ttk.Button, ttk.Radiobutton):
            input_args["text"] = label
            input_args["variable"] = self.variable
        else:
            self.label = ttk.Label(self, text=label, **label_args)
            self.label.grid(row=0, column=0, sticky=(tk.W + tk.E))
            input_args["textvariable"] = self.variable

        self.input = input_class(self, **input_args)
        self.input.grid(row=1, column=0, sticky=(tk.W + tk.E))
        self.columnconfigure(0, weight=1)
        self.error = getattr(self.input, 'error', tk.StringVar())
        self.error_label = ttk.Label(self, textvariable=self.error, **label_args)
        self.error_label.grid(row=2, column=0, sticky=(tk.W + tk.E)) 

def __init__(self, title):
        self.root = tk.Tk()
        self.root.title(title)
        tk.Grid.rowconfigure(self.root, 0, weight=1)
        tk.Grid.columnconfigure(self.root, 0, weight=1)
        self.app = MainApplication(self.root)
        self.app.grid(row=0, column=0, sticky=tk.N+tk.S+tk.E+tk.W)
        configure_style(ttk.Style()) 

def create_widgets(self):
        self.tree.bind('<Double-1>', self.click_item)

        ysb = ttk.Scrollbar(
            self, orient=tk.VERTICAL, command=self.tree.yview)
        self.tree.configure(yscroll=ysb.set)

        self.tree.grid(row=0, column=0, sticky=(tk.N, tk.S, tk.E, tk.W))
        ysb.grid(row=0, column=1, sticky=(tk.N, tk.S))
        self.columnconfigure(0, weight=1)
        self.rowconfigure(0, weight=1)