Touchpad support for laptops...

Touchpad support for laptops

This fix is a workaround to receive mouse wheel and scroll messages 
from synaptics touchpad driver used in majority of laptops. 

Removed fake scroll bars in RenderWidgetHostHwnd so that it can now
receive mouse wheel messages from synaptics drivers for Dell, Toshiba 
laptops. 

Added fake scroll bars to WebContents so that it can receive scroll
messages. WebContents then reflects scroll messages to the view to
give it a chance to handle them.


BUG=4
TEST=Touchpad scrolling and zooming (control + scroll) on various laptops.



Committed: http://src.chromium.org/viewvc/chrome?view=rev&revision=2266

[Peter Kasting, 2008-09-16 00:00:02]

Drive-by: Seems like we could also remove OnNcCalcSize() from
RenderWidgetHostHWND, now that the fake scrollbars are gone from it.

[amit, 2008-09-16 00:34:36]

Good catch, will do :)

On 2008/09/16 00:00:02, pkasting wrote:
> Drive-by: Seems like we could also remove OnNcCalcSize() from
> RenderWidgetHostHWND, now that the fake scrollbars are gone from it.

[jeongkyu.kim, 2008-09-17 06:11:59]

Good job! Glad to see the bug was finally fixed. However, I'd like to point this
changes might cause another issue.

In the previous version, you can scroll browser window by clicking at the right
edge of the screen when the window is maximized. However, with this changes, the
action does not work anymore. You have to aim scrollbar area exactly.

The action seems to be supported on Firefox3 but not on IE7. Thus, users from IE
may not realize the side effect of this change, but users from Firefox may
experience some inconvenience.

[dsbogard, 2008-09-18 19:56:02]

Sorry for the q, but how exactly do I apply this patch?

The problem is driving me nuts.

On 2008/09/17 06:11:59, jeongkyu.kim wrote:
> Good job! Glad to see the bug was finally fixed. However, I'd like to point
this
> changes might cause another issue.
> 
> In the previous version, you can scroll browser window by clicking at the
right
> edge of the screen when the window is maximized. However, with this changes,
the
> action does not work anymore. You have to aim scrollbar area exactly.
> 
> The action seems to be supported on Firefox3 but not on IE7. Thus, users from
IE
> may not realize the side effect of this change, but users from Firefox may
> experience some inconvenience.

[jmh010, 2008-09-20 18:17:34]

When will we see this implemented into a Chrome build?

[corydeppen, 2008-10-16 00:49:35]

On 2008/09/20 18:17:34, jmh010 wrote:
> When will we see this implemented into a Chrome build?

This is working now using the Dev Channel
(http://dev.chromium.org/getting-involved/dev-channel/).