Mac OS X中的绑定键 - Tkinter

时间:2017-01-27 18:13:04

标签: python macos tkinter tk key-bindings

我有一个在Ubuntu系统中运行良好的代码。这只是基于它的最小代码:

import tkinter as Tk
import tkFileDialog 
import ttk

class AppGUI(Tk.Frame):

    def __init__(self, parent):  
        self.ctrl = False
        self.parent = parent
        self.centerWindow()
        self.initGUI()
        self.plot()

    def initGUI(self):
        # Notebooks
        self.notebook  = ttk.Notebook(self.parent)
        self.frame_one = Tk.Frame(self.notebook)   # first page
        self.frame_two = Tk.Frame(self.notebook)   # second page
        self.notebook.add(self.frame_one, text='Notebook 1')
        self.notebook.add(self.frame_two, text='Notebook 2')
        self.notebook.pack(side = Tk.TOP, fill="both", expand=True)

        # Realization frame
        self.out_frame = Tk.Frame(self.parent, bd=1, relief=Tk.SUNKEN)
        self.out_frame.pack(side=Tk.TOP, fill="both", expand=True)

        # Key events
        self.key()

    def centerWindow(self):
        w = 800
        h = 800

        sw = self.parent.winfo_screenwidth()
        sh = self.parent.winfo_screenheight()

        x = (sw - w)/2
        y = (sh - h)/2
        self.parent.geometry('%dx%d+%d+%d' % (w, h, x, y))


    def key(self):
        # Key events
        def press(event):
            self.ctrl = True
        def release(event):
            self.ctrl = False

        self.parent.bind('<Control_L>', press)
        self.parent.bind('<KeyRelease-Control_L>', release)

    def plot1(self):
        f = plt.figure(figsize=(1, 1), dpi=300)
        c_plot1 = FigureCanvasTkAgg(f, master=self.frame_one)
        c_plot1.show()
        c_plot1.pack(side=Tk.LEFT, fill="both", expand=True)

        def onClickPlot1(event):
            if event.inaxes is not None:
                if self.ctrl:
                    print "Control key pressed"
                    # Do my stuff

        c_plot1.mpl_connect('button_press_event', onClickPlot1)

    def plot2(self):
        # Same stuff for plot 2

    def plot(self):
        self.plot1()
        self.plot2()


def main():
    root = Tk.Tk()
    app = AppGUI(root)
    root.mainloop()  


if __name__ == '__main__':
    main()

当我在Ubuntu机器上运行时,我可以看到,无论Control键,我按下(向左或向右控制)都被正确绑定,因为我看到了打印和预期的视觉效果。另一方面,在Mac中运行相同的代码,我看不到打印输出,当然,预期的结果也不会发生。

我按照this文档执行绑定。我不是要使用Mac Command键,只是常规左Control

不同的系统是否有不同的招标代码?这没有意义,但我找不到问题。

1 个答案:

答案 0 :(得分:0)

共有三种不同类型的键:

  1. 普通键;例如:s,a,1,9和...

  2. 标点符号;例如'Left','Up','bracketright'(']'), ! ,%和...

  3. 特殊键;例如:

    • 'Meta_L'(在Mac中为命令)
    • 'Alt_L'(在Mac中为Alt)
    • 'Control_L'(在Mac中为ctrl)
    • 'super_L'(在Mac中为fn)
    • 'Shift_L(在Mac中是shift)
    • “ Caps_Lock”
    • 以及fn + F2之类的组合键也是标点符号。
# bind and show a key press event with Tkinter
from tkinter import *
root = Tk()
prompt = '      Press any key      '
label1 = Label(root, text=prompt, width=len(prompt), bg='yellow')
label1.pack()
def key(event):
    if event.char == event.keysym:
        msg = 'Normal Key %r' % event.char
    elif len(event.char) == 1:
        msg = 'Punctuation Key %r (%r)' % (event.keysym, event.char)
    else:
        msg = 'Special Key %r' % event.keysym
    label1.config(text=msg)
root.bind_all('<Key>', key)
root.mainloop()

上面的代码说明了一切;)