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Graham A Welsh
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 Posted: Thu Oct 23, 2003 10:58 pm Post subject: Newbie Question about moving control/focus |
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Hello All,
I am using Delphi 5 Pro on Win98 and am having problems returning focus
to the parent form of certain buttons.
I have a TForm with various components, edit boxes, labels, combobox,
grid and some buttons. The sequence is as follows:-
Once the form is created a choice is made from the dropdown list of the
combobox. Certain items of the grid are filled in based on this choice.
Other items are manually filled in.
When all input is finished then a 'Save' button is pressed, which saves
the input to a database.
The above sequence works correctly. My problem is how to return
control/focus to the parent form when processing by the Save button has
completed. At this point I need the parent form to be back in the same
condition as when it was created, so that fresh input may commence.
I also have a problem as to how I offer a choice with an Exit button,
i.e. Yes or No. How can I pass control back from the Exit button to the
component which had control before the Exit button was pressed.
I am sure the solutions to these problems are obvious and simple, but,
I'm just not seeing them at the moment.
Any help will be gratefully received.
--
Graham A Welsh
Targeted Software Solutions Ltd
To reply, change "limited" to "ltd" in Email Address
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Jon Jacobs
Guest
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| Posted: Thu Oct 23, 2003 11:21 pm Post subject: Re: Newbie Question about moving control/focus |
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This is off the top of my head, but I seem to remember, that if you have an
OnEnter handler for your Exit button, ActiveControl will still be the
control you are coming from at that point. Save it into another variable of
type TWinControl, then, when you have received your yes or no input (in the
OnClick handler perhaps) - if it is no:don't exit, then you can restore
focus to the TWinControl you saved - perhaps by assigning it back to
ActiveControl.
Jon
"Graham A Welsh" <graham.welsh (AT) targeted-software-solutions (DOT) limited.uk> wrote
in message news:MPG.1a026d687f48a2da989684 (AT) newsgroups (DOT) borland.com...
| Quote: | Hello All,
I am using Delphi 5 Pro on Win98 and am having problems returning focus
to the parent form of certain buttons.
I have a TForm with various components, edit boxes, labels, combobox,
grid and some buttons. The sequence is as follows:-
Once the form is created a choice is made from the dropdown list of the
combobox. Certain items of the grid are filled in based on this choice.
Other items are manually filled in.
When all input is finished then a 'Save' button is pressed, which saves
the input to a database.
The above sequence works correctly. My problem is how to return
control/focus to the parent form when processing by the Save button has
completed. At this point I need the parent form to be back in the same
condition as when it was created, so that fresh input may commence.
I also have a problem as to how I offer a choice with an Exit button,
i.e. Yes or No. How can I pass control back from the Exit button to the
component which had control before the Exit button was pressed.
I am sure the solutions to these problems are obvious and simple, but,
I'm just not seeing them at the moment.
Any help will be gratefully received.
--
Graham A Welsh
Targeted Software Solutions Ltd
To reply, change "limited" to "ltd" in Email Address
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Kurt Barthelmess
Guest
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| Posted: Fri Oct 24, 2003 11:30 am Post subject: Re: Newbie Question about moving control/focus |
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Graham A Welsh <graham.welsh (AT) targeted-software-solutions (DOT) limited.uk>
wrote:
| Quote: | My problem is how to return
control/focus to the parent form when processing by the Save button has
completed. At this point I need the parent form to be back in the same
condition as when it was created, so that fresh input may commence.
|
There are two parts to this: a) Clearing out the old input data so
that the user starts frash, and b) tweaking the focus.
On a), you may want to write a method that "resets" the form to a
"clean" condition. Then after performing the "save", call that method.
The forms initialization logic should call that method also so the
code is not duplicated.
On b), call the desired control's SetFocus method, e.g.
ButtonA.SetFocus.
| Quote: | I also have a problem as to how I offer a choice with an Exit button,
i.e. Yes or No. How can I pass control back from the Exit button to the
component which had control before the Exit button was pressed.
|
That gets much more complicated. Let's assume the Exit button is
activated by a mouse click. The button receives the focus at the time
it receives the mouse down message. But it does not get activated at
that point - the OnClick event does not fire until the mouse up
message is seen. (And if the mouse is moved outside the Exit button
before being released, the button won't be activated or "clicked" at
all, although it will keep the focus.) You can solve this by using
messages and watching for focus changes, but there is no easy
solution.
| Quote: | I am sure the solutions to these problems are obvious and simple
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This is Windows. There are no obvious, much less simple, solutions<g>.
Good luck.
Kurt
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Graham A Welsh
Guest
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| Posted: Sun Oct 26, 2003 1:03 pm Post subject: Re: Newbie Question about moving control/focus |
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Thanks to Jon & Kurt for their answers. I will be investigating the
possibilities suggested.
--
Graham A Welsh
Targeted Software Solutions Ltd
To Reply: Change "limited" to "ltd" in email address
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