[DUG] Form activation / Mouse click

[Jolyon Smith]

Clarification:  You need to test the loword of the wParam for
WA_CLICKACTIVE, not wParam itself.


On 16 September 2011 11:46, Jolyon Smith <jsmith at deltics.co.nz> wrote:

> Just to be strictly accurate, "Focus" is a keyboard concept.  Mouse events
> do not have a "Focus" context, but applications do have the concept of
> "active window", which applies to top level windows only.
>
> If this behaviour is important to you then the wParam of the WM_ACTIVATE
> indicates how a window became activated:
>
> http://msdn.microsoft.com/en-us/library/ms646274(v=vs.85).aspx
>
> You could implement a WM_ACTIVATE handler on your application form call
> inherited first to get the default message handling, and then if wParam is
> WA_CLICKACTIVE you could lookup the control at the mouse position and send
> it a WM_LBUTTONDOWN message, effectively resurrecting and forwarding the
> mouse button message that was consumed and transformed into the ACTIVATE
> message.
>
> I have no idea whether that would actually work but it could be fun to try
> it.
>
> :)
>
>
>
> On 16 September 2011 11:10, Geoff & Jacquie <geoff at statesoft.co.nz> wrote:
>
>>  I have noticed the same behaviour using a mouse and decided it is normal
>> for windows apps. If the form doesn’t have focus then why would it process
>> the button event? I think the first event on an unfocussed form or app
>> probably sets the focus and is then discarded. This behaviour is different
>> in a browser window as you note.****
>>
>> ** **
>>
>> As for type of control, while my browser has focus, no menus, buttons,
>> put-cursor-here-click, on this Outlook message window results in the action
>> obtained when clicked “while using Outlook”. I have to click again.****
>>
>> ** **
>>
>> Geoff & Jacquie Jenkins, State Electronics,****
>>
>> *1576 Weranui Road
>> RD 1
>> Silverdale 0994*
>>
>> Ph 09 9581000* *
>>
>> Computer software development professionals, web development amateur
>> Computers & Peripherals sales and service.
>> Linksys Partner VAR - Business Systems, LVS (VOIP) & Linksys One****
>>
>> ** **
>>  ------------------------------
>>
>> *From:* delphi-bounces at listserver.123.net.nz [mailto:
>> delphi-bounces at listserver.123.net.nz] *On Behalf Of *John Bird
>> *Sent:* Friday, 16 September 2011 3:06 a.m.
>>
>> *To:* NZ Borland Developers Group - Delphi List
>> *Subject:* Re: [DUG] Form activation / Mouse click****
>>
>>  ** **
>>
>> That might be a Windows issue?  I have seen other programs where clicking
>> a button in a  non-focussed app does not click the button, and some where it
>> does.  Eg Windows Mail clicking send receive does activate the form but does
>> not click the Send Receive button.  However a Firefox Refresh button will
>> activate even if the Firefox Window does not have focus....****
>>
>>  ****
>>
>> I suspect its the type of control – maybe Toolbar buttons or Speedbuttons
>> do and others do not for instance? (guessing)****
>>
>>  ****
>>
>> John Bird
>> JBCL
>> Contact:
>> johnkbird at paradise.net.nz
>> jbclnz at xtra.co.nz
>> (027 4844528)
>> http://www.jbcl.co.nz
>> http://jbclnz.googlepages.com****
>>
>>  ****
>>
>> *From:* Ross Levis <ross at stationplaylist.com> ****
>>
>> *Sent:* Thursday, September 15, 2011 2:32 AM****
>>
>> *To:* 'NZ Borland Developers Group - Delphi List' <delphi at delphi.org.nz>
>> ****
>>
>> *Subject:* [DUG] Form activation / Mouse click****
>>
>>  ****
>>
>> In my D7 app it is possible to have 2 non-modal forms on the screen with
>> buttons on each.  A customer who has a touch screen says when he touches a
>> button on the form that doesn’t currently have the focus, the button doesn’t
>> get clicked.  First touch only activates the form and a 2nd touch is
>> required.****
>>
>>  ****
>>
>> Anyone know why that would be? I would have thought a touch on a screen
>> touch was identical as clicking with a mouse.****
>>
>>  ****
>>
>> Cheers,
>> Ross.****
>>  ------------------------------
>>
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