How to change on_press "animation" of Tkinter button in python

Question

i have a taskbar-like Frame, which contains custom Buttons 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.