Why does my form text dissappear on Show?

Paul Bailey

Delphi Developer

Sun, 14 Nov 1999 03:00:00 GMT

Why does my form text dissappear on Show?

Hi All,

I use the Show method to display a text message while I am doing
something.

eg. MessageForm.Show;
{Do calcs and other stuff}
MessageForm.Close;

Why is it that the text (TLabel) message and images I placed on the form
does not show while the MessageForm.Show is active?

Any help or light on the matter would be helpful;

PAUL
pa...@maties.sun.ac.za

Rob

Delphi Developer

Sun, 14 Nov 1999 03:00:00 GMT

Re:Why does my form text dissappear on Show?

On Wed, 28 May 1997 12:19:03 -0400, Paul Bailey

Quote

<pa...@maties.sun.ac.za> wrote:
>Hi All,

>I use the Show method to display a text message while I am doing
>something.

>eg. MessageForm.Show;
> {Do calcs and other stuff}
> MessageForm.Close;

>Why is it that the text (TLabel) message and images I placed on the form
>does not show while the MessageForm.Show is active?

>Any help or light on the matter would be helpful;

>PAUL
>pa...@maties.sun.ac.za

Hi, what I think you need to do is one of two things, after showing
the form you could do APPLICATION.PROCESSMESSAGES; this will
definately do the trick, OR something like MESSAGEFORM.REFRESH; (or
UPDATE, can never remember!)

Chris Jobso

Delphi Developer

Sun, 14 Nov 1999 03:00:00 GMT

Re:Why does my form text dissappear on Show?

Quote

Paul Bailey wrote:

> Hi All,

> I use the Show method to display a text message while I am doing
> something.

> eg. MessageForm.Show;
> {Do calcs and other stuff}
> MessageForm.Close;

> Why is it that the text (TLabel) message and images I placed on the form
> does not show while the MessageForm.Show is active?

> Any help or light on the matter would be helpful;

> PAUL
> pa...@maties.sun.ac.za

All Show does is make the form visible, but it doesn't guarantee to
fully repaint it. Change your code to:

MessageForm.Show;
MessageForm.Refresh; // force everything to paint NOW
{Do calcs and other stuff}
MessageForm.Close;

Chris Jobson

Paul Francis Gilbe

Delphi Developer

Tue, 16 Nov 1999 03:00:00 GMT

Re:Why does my form text dissappear on Show?

Quote

Paul Bailey <pa...@maties.sun.ac.za> writes:
>Hi All,
>I use the Show method to display a text message while I am doing
>something.
>eg. MessageForm.Show;
> {Do calcs and other stuff}
> MessageForm.Close;
>Why is it that the text (TLabel) message and images I placed on the form
>does not show while the MessageForm.Show is active?
>Any help or light on the matter would be helpful;

As I recall, I had a similiar sort of problem when I was displaying a splash
screen. I think I solved it eventually by putting a Form.Refresh after the
Show, and it properly displayed all the components on the form.

Quote

>PAUL
>pa...@maties.sun.ac.za

--
Paul Gilbert | p...@yallara.cs.rmit.edu.au
Bach App Sci, Bach Eng | The opinions expressed are my own, all my own, and
Year 4, RMIT Melbourne | as such will contain no references to small {*word*141}
Australia | creatures from Alpha Centauri.

Radam Batna

Delphi Developer

Wed, 17 Nov 1999 03:00:00 GMT

Re:Why does my form text dissappear on Show?

Quote

Paul Bailey wrote:

> Hi All,

> I use the Show method to display a text message while I am doing
> something.

> eg. MessageForm.Show;
> {Do calcs and other stuff}

Insert inside your loop
Application.ProcessMessages;

Quote

> MessageForm.Close;

> Why is it that the text (TLabel) message and images I placed on the form
> does not show while the MessageForm.Show is active?

> Any help or light on the matter would be helpful;

> PAUL
> pa...@maties.sun.ac.za

Doing long calculations hogs the CPU and prevents it from doing other
tasks (like repainting the screen). Application.ProcessMessages passes
the control of the CPU to other tasks.

Radam
ra...@tridel.com.ph

Other Threads

1. Making '95 desktop text background dissappear

2. Showing a form once another form is shown

3. Woah..my forms dissappeared!

4. how forse TDBLookupCombo to show current field value on form create/show (D4)

5. Can someone show me how this is done

6. Why is Indy doing that to me!?

7. Why Delphi is doing this?

8. Why is Interbase sooo sloooow when doing full scans

9. Showing a form in the OnShowEvent of another Form (WinXP)

10. View forms not showing all forms