如何更改python中Tkinter按钮的on_press“动画”

Question

i have a taskbar-like Frame , which contains custom Button s with images. But everytime i click on this button, Tkinter displaced the button 1px to the right/buttom.

Is it possible to override this behaviour? Or do i have to derived from Tkinter.Label instead of Tkinter.Button ?

edit: Adding some code: import Tkinter import logging

logger = logging.getLogger(__name__)
class DesktopBtn(Tkinter.Button):
    '''
    Represents a Button which can switch to other Desktops
    '''

    _FONTCOLOR="#FFFFFF"

    def getRelativePath(self,folder,name):
        import os
        dir_path = os.path.dirname(os.path.abspath(__file__))
        return os.path.abspath(os.path.join(dir_path, '..', folder, name))

    def __init__(self, parent,desktopManager,buttonName, **options):
        '''
        :param buttonName: Name of the button

        '''
        Tkinter.Button.__init__(self, parent, **options)
        logger.info("init desktop button")
        self._imagePath=self.getRelativePath('res','button.gif')
        self._BtnPresspath = self.getRelativePath('res','buttonP.gif')
        self._BtnPressImage = Tkinter.PhotoImage(file=self._BtnPresspath)
        self._image = Tkinter.PhotoImage(file=self._imagePath)
        self.bind('<ButtonPress-1>',self._on_pressed)
        self.bind('<ButtonRelease-1>',self._on_release)
        self._parent = parent
        self._btnName = buttonName
        self._desktopManager = desktopManager
        self.config(width=70, height=65,borderwidth=0,compound=Tkinter.CENTER,font=("Arial", 9,"bold"),foreground=self._FONTCOLOR, text=buttonName,wraplength=64,image=self._image, command=self._onClickSwitch)

    def _on_pressed(self,event):
        self.config(relief="flat")
        self.config(image=self._BtnPressImage)

    def _on_release(self,event):
        self.config(image=self._image)

    def _onClickSwitch(self):
        self.config(relief="flat")
        logger.info("Buttonclickmethod onClickSwitch")
        self._desktopManager.switchDesktop(self._btnName)

    def getButtonName(self):
        return self._btnName

Answer 1

Not sure whether this works with your specialized button, but how the button moves when it's clicked seems to depend on it's relief style . With relief=SUNKEN , the button seems not to move at all when clicked, and with borderwidth=0 it appears to be indistinguishable from a FLAT button.

Minimal example:

root = Tk()
image = PhotoImage(file="icon.gif")
for _ in range(5):
    Button(root, image=image, borderwidth=0, relief=SUNKEN).pack()
root.mainloop()

Note that you set and re-set the relief to FLAT multiple times in your code, so you might have to change them all for this to take effect.

Answer 2

You can disable the animation of a button by returning "break" in the widget's bind, which stops the propagation of bound functions.

So you can either alter the function you normally have bound to the button to return "break".

Or you can add another bind, this does however prevent any binds that are made after this one:

tkButton.bind("<Button-1>", lambda _: "break", add=True)

Answer 3

I think I found some kind of a solution using relief and border:

closebut = Button(title, text="X", relief=SUNKEN, bd=0, command=close)
closebut.pack(side=RIGHT)

You can observe that I used relief = SUNKEN and then bd = 0 to get a nice FLAT effect on my button!