How do I intercept a keystroke ?

wxPython Users
1

I have a wxTextCtrl which should usually accept text input from the user, but where certain keypresses should instead generate other events. Which event type do I need for this, and how do I ensure that no text is appended to the text control for that keystroke?

···

--
Ben Sizer
http://pages.eidosnet.co.uk/kylotan

2

Here's one way...

EVT_KEY_DOWN(self.thewxTextCtrl, self.OnKeyDown)

def OnKeyDown(self, evt):
      key = evt.GetKeyCode()
        
        if key == WXK_RETURN: # or whatever
            self.dosomestuff()
        else:
            evt.Skip()

···

On Wed, 2003-12-10 at 15:48, Ben Sizer wrote:

I have a wxTextCtrl which should usually accept text input from the
user, but where certain keypresses should instead generate other events.
   Which event type do I need for this, and how do I ensure that no text
is appended to the text control for that keystroke?

--
Thys Meintjes
BEng Electronic (UP), MEng Bio (UP)
Intrepid Investigator of Interesting Things
+27 82 3764 602

3

Ben Sizer wrote:

I have a wxTextCtrl which should usually accept text input from the user, but where certain keypresses should instead generate other events. Which event type do I need for this, and how do I ensure that no text is appended to the text control for that keystroke?

Here is one way. It is in the demo.

class MyValidator(wxPyValidator):
    def __init__(self, flag=None, pyVar=None):
        wxPyValidator.__init__(self)
        self.flag = flag
        EVT_CHAR(self, self.OnChar)
    def Clone(self):
        return MyValidator(self.flag)
    def Validate(self):
        object = self.GetWindow()
        objectname = object.GetName()
        if objectname == 'textctrl':
            val = object.GetValue()
            return val
    def OnChar(self, event):
        key = event.KeyCode()
        if self.flag == 'SEX' and chr(key) in 'MFmf':
            self.dosomething()
            return
        return

Use the validator with the appropriate flag for your TextCtrl

widget = TextCtrl(self, -1, size=(-1,-1), validator=MyValidator('SEX'))

Derrick