scroll bug

[Frank Perbet]

Michael Smith wrote:

>On  Sat, 24 Jan 2004 20:18:07 +0100 Frank Perbet <frank.perbet at imag.fr>
>wrote:
>
>| Hi all,
>| 
>| I described a mysterious bug 2 or 3 month ago :
>| Every 100 mouse clics (about), the window scroll randomly up and down 
>| during 2 or 3 clics.
>| Is there a curse on my computer or are there some other silent victim
>| in this world ?!?
>| This is a small but *very annoying* and *regression* bug (it wasn't
>| here in 5.3).
>
>What kind of mouse clicks are these? On the menu? Or the text widget?
>Which mouse button?
>
>  
>
Let's be more precise.
I'm talking about a particular mouse event : a single left button mouse 
click on the text widget.
This very common action is suppose to move the cursor without scrolling 
the window.
But sometimes, during this event, the window scroll randomly up and down 
during 2 or 3 clics.

Typically, let's say that I want to click on the line 123 which is in 
the middle of the window.
First I put the mouse wherever on the line 123 and then I press the left 
mouse button.
Then the window scrolls and now it's the line 127 which is in the middle 
of the screen.
The cursor is under the mouse, on the line 127.
Then the window oscillate using the same process (random jump) during 2 
or 3 clicks.
Then it calms down and go back to a proper behavior.


Note that no mouse selection are possible when this bug happens.
If I remember well, Tk Soh also has some problem with here.
Again, this is a small but *very annoying* and *regression* bug (it 
wasn't here in 5.3).



The last time this bug has been reported, few other small bugs where 
discovered.
1) Steve Lobasso :
I can get it to scroll one line if I click on the far right edge of the text
area of a wrapped line that is not completely on-screen.

2) Arne Forlie :
Just a wild idea, but do you have the incremental search line up when 
you do the click?
I can reproduce that sounds like your bug with:
Open incremental seach line (Ctrl + I) and click anywhere in the main 
text. When the incremental search line disappears, the text seems to 
scroll 2 lines upwards.

3) Me :
Using cursorVPadding, if you click, nothing happen. After, if you press 
the right arrow for instance (or any key). There's a jump.
Note that this one only hapen when using the keyboard.
Since it's closely related, I put it here.


None of these bugs is the one I'm talking about.

thanks

frank perbet