[SOLVED]Adding Existing Forms to a Project.

[cov]

I've got an application that has somehow borked.

http://www.lazarus.freepascal.org/index.php/topic,19811.0.html

The solution would appear to be to start a new Project and add all the Forms and Units from the borked Project into the new one.

However, I can't see how to do this.

[BigChimp]

Open the forms/code with the respective file/open menu commands.

Go to project inspector, add files, tab editor files, select all files, click add to project

(something like this, going on memory here)

[cov]

Sorry for the stupid question.

Obviously all you do is refer to the new unit in the 'uses' section of one of the PAS units and the new unit is pulled in to the Project together with it's form.

 

[cov]

Hmm.

Form3.Visible=True;

Now gives me an error:

Project CADCab raised exception class 'External: SIGSEGV'.

 In file 'apassword.pas' at line 71:
Form3.Visible:=True;

The first form is a login form which, if a correct password is proffered, calls Form3. However, it doesn't appear that  Form3 has been built.

[JuhaManninen]

The first form is a login form which, if a correct password is proffered, calls Form3. However, it doesn't appear that  Form3 has been built.

You can create the form in your code, or you can let the project auto-create it.
In Lazarus IDE, see Project Options -> Forms.

Juha

[cov]

Okay, thanks Juha.

The Options->Forms doesn't have Form3 in the 'Available Forms' pane. How do I get it into the Project?

[User137]

Simple solution to the error is, not trying to manipulate other forms in the onFormCreate event. You propably have a loading order error, where password form is created before form3. It will throw SIGSEGV because that form is null. It can be solved by using onFormShow for example, just making sure that it only happens once.

[JuhaManninen]

The Options->Forms doesn't have Form3 in the 'Available Forms' pane. How do I get it into the Project?

BigChimp tried to explain it. However the easiest way is, when the file is open in editor :
  Project -> "Add Editor File to Project"

Juha

[cov]

Okay, I see.

If the PAS unit it open in the source editor, then the associated Form appears in the Autocreate pane.

Many thanks!

I'll just test it, and if there are no more hitches, I'll mark the thread as solved.

[cov]

Just to add that the Form needs to be called up as well before it shows up in the Autocreate Form pane.

(Press F12 while the associated PAS unit it up on the editor).

Many thanks to BigChimp and Juha. Thanks guys!

[JuhaManninen]

Just to add that the Form needs to be called up as well before it shows up in the Autocreate Form pane.
(Press F12 while the associated PAS unit it up on the editor).

Sounds like a bug. Did you add the file to your project for sure?
Check : Project -> Project Inspector

One more note about autocreating forms:
In a small project it is OK to autocreate all forms but not so in a big project.
Many forms are used only seldom. A form may not be needed at all during a user's work session.
Autocreating such forms slows down the startup and reserves memory.
Then it is better to create the form in code when needed and free it afterwards.

Juha