Re: how to check if the input

please ignore this topic !! seems it is published by wrong operation
before I finished editing it . sorry for that!!

On Nov 28, 10:48 am, Bruce Zu <bruce...@sonyericsson.com> wrote:
> background:
> there is  a  variable  : " NpTextBox createTxt "
> there is  a button, by  default   thisButton.setEnabled(false).
>
> what logic I want :
>     when user put something  into  createTxt.  I will "
> thisButton.setEnabled(true)."
>
>     user may  type or middle click the mouse to paste something into
> createTxt.
>
> my question is :
>
>    what event  type I should handle to implement my logic especially
> when user middle click mouse :
>
>    I do some test as below :
>
> I add 4 handlers of 'Click', 'MouseDown', 'MouseUp', and 'MouseOver'
> event .
>
> I add System.out.println(). on some lines for test and got below
> output .(because
> eclipse beakpoints on these lines in GWT debug mode not always work.)
>
> I copy a string "projectname" then I move my mouse to the createTxt on
> the Web UI page and click middle button of mouse twice and find output
> as below .
>
> ...
> -----------MouseOver--------------
> ----------createTxt.getAbsoluteLeft(): [0]-------------
> ----------createTxt.getValue(): []-------------
> ----------createTxt.getText(): []-------------
> -----------MouseDown--------------
> ----------createTxt.getAbsoluteLeft(): [0]-------------
> ----------createTxt.getValue(): []-------------
> ----------createTxt.getText(): []-------------
> -----------MouseUp--------------
> ----------createTxt.getAbsoluteLeft(): [0]-------------
> ----------createTxt.getValue(): []-------------
> ----------createTxt.getText(): []-------------
> -----------MouseClick--------------
> ----------createTxt.getAbsoluteLeft(): [0]-------------
> ----------createTxt.getValue(): []-------------
> ----------createTxt.getText(): []-------------
>
> [ reminder : here is the place that fist click is done  ]
>
> -----------MouseDown--------------
> ----------createTxt.getAbsoluteLeft(): [22]-------------
> ----------createTxt.getValue(): [projectnameprojectname]-------------
> ----------createTxt.getText(): [projectnameprojectname]-------------
> -----------MouseUp--------------
> ----------createTxt.getAbsoluteLeft(): [22]-------------
> ----------createTxt.getValue(): [projectnameprojectname]-------------
> ----------createTxt.getText(): [projectnameprojectname]-------------
> -----------MouseClick--------------
> ----------createTxt.getAbsoluteLeft(): [22]-------------
> ----------createTxt.getValue(): [projectnameprojectname]-------------
> ----------createTxt.getText(): [projectnameprojectname]-------------
> ....
>
> we can see after  first click on mouse middle button  the
> createTxt.getText() will return empty string.
>
> Gwt
> from the second click it will work.
> seems the 'Click', 'MouseDown', 'MouseUp', and 'MouseOver' events are
> handler before GWT set value to ' createTxt' .
>
> question  1>  : which even should  I monitor and which handler should
> I add to createTxt  so that I can catch the content after the first
> click here ?
>
> question  2>  if user right click mouse , OS (here I use Ubuntu)
> will feedback a menu with a option 'paste' , now if user click this
> option . GWT Web UI can not catch this click event, but this event can
> be catch
> by OS. I do not know if we should catch this event.
>
> and take different browser , OS ...into account.
>
> so I want to know if we must have this function . or can we do this in
> the same way of "Create Branch" --The button is never disabled and the
> string checking can be done on button click event.
>
> I think it will be much easier than make a check for all the events. I
> am not clear
> the background about why we need disabling the button . I think
> handling all this
> events is not necessary except that you really expect to this way.
>
> thanks in advance!!
>
> //Bruce

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