Successful compile, but main form will not display
lazarus / 9-Editor

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CarmichaelJohn · 2020-07-28 21:25

Hello and help please,

I had some difficulty with my program, so I created a new package and
recoded it in that new package.  I finished it and tried to run it. 
The compile was successful, but the main form does Not display at
all.  The IDE just sits there showing a green succcess bar, but
nothing else. How do I get the main form to show up?

I have tried placing this statement in Program Project1 code:
Application,CreateForm(TForm1, Form1); But that does not work; It
creates a small, blank Form1 even though I changed the name of my
primary form to “Form1". I also tried using the same statement in the
begin section of the program BetaPDFAnalysisProjectJuly282020; I also
tried placing that statement there with the old name of the form,
fFormMAINBetaPDFAnalysisJuly282020, before I changed it to Form1.  I
am really lost.

Thank you in advance for any help you can provide.
Carmichael John

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trev · 2020-07-29 01:08

You should not need to manually add any Application.CreateForm() lines
at all to the project source file as Lazarus takes care of doing this
by default.

Try this: start a new project - Project > New project; choose
application; compile and run it. This should simply comprise a blank
form and running it should cause the blank form to appear.

Does that work as expected?

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process_1 · 2020-07-29 01:36

You meant you have created new component?

Better to add small source example with minimum code and show what you
have to accomplish.

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Handoko · 2020-07-29 01:45

Quote from: process_1 on July 29, 2020, 03:36:09 amBetter to add small
source example with minimum code and show what you have to accomplish.
+1

@CarmichaelJohn

Don't be shy to show us your code. The more people inspect it, the
better its quality will be. If you're not willing to publicize the
source code, you can write a demo that showing the issue.

To do it:
Create a new folder, copy and paste all the necessary files except:
the binary (exe file), *.bak, lib and backup folders. Compress the
folder and send the zip here.

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process_1 · 2020-07-29 02:04

I have never had a need to made any custom component if that is the
case, but creating a form dynamically for a component require some
internal code in the component itself and the process can be found in
any Lazarus component.

With main form app, I would leave automatical process of creating,
showing and destroying the main form, while other forms can be created
dynamically by creating and freeing it in the code.

All depends on what you actually need to accomplish.

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CarmichaelJohn · 2020-07-30 23:05

To trev, process_1, and Handoko, Thank you all very much.  I decided
to rebuild my program and start over. That worked and it is running. 
I do not know what was different in the rebuild from the original.
Incidentally, I was Not attempting to build a new component; the only
components I was using was TMainMenu, TLabel, TEdit, and TAGraph. 
Once again, Thank you, John