Introspection

General
1

Using Introspection I may know (for exemple) if a window is open

Dim intro as Introspection.TypeInfo = Introspection.GetType(app.window(i)) if intro.Name = name then
but how may I get acces to the instance?, to , for example, close it

2

Errt you don’t need Introspection to determine if a window is open. I was told the Window() array can change order as you access the items, so I always copy it to a local array first.

dim aroWindows() as Window
for i as Integer = (WindowCount - 1) downto 0
  aroWindows.Append(aroWindows(i))

next i

for i as Integer = 0 to aroWindows.ubound
  dim oThis as Window = aroWindows(i)

  if oThis isa winWindowClass then
    // This is the window we're looking for
    oThis.Close

  end

next i
3

Well, in fact, if the window is open I want to close it, but if it’s not, then open it.

I just receive the window’s name

4

Easy enough, slight tweak :slight_smile:

dim aroWindows() as Window
for i as Integer = (WindowCount - 1) downto 0
  aroWindows.Append(aroWindows(i))

next i

dim oTargetWindow as Window

for i as Integer = 0 to aroWindows.ubound
  dim oThis as Window = aroWindows(i)

  if oThis isa winWindowClass then
    // This is the window we're looking for
    oTargetWindow = oThis
    exit for i

  end

next i

if oTargetWindow = nil then
  // Window isn't open, let's open one
  oTargetWindow = new winWindowClass
  oTargetWindow.Show

else
  // Window is open, close it
  oTargetWindow.Close

end

(both chunks written in the forum post editor, that’s how often I need this boilerplate code)

5

Thanks Tim, but it’s not exactly I’m looking for.

Just receiving the window’name I would like to know the type (about ten), i.e avoiding the
if oThis isa winWindowClass1 then
elseif oThis isa winWindowClass2 then
elseif oThis isa winWindowClass3 then

In fact this is how now is right now my code, with a select case.

Imagine we have a Specialwindow
we open it as

Var w as new SpecialWindow w.show

But about if you just receive the name as string “SpecialWindow”

Var w as new name

doesnt work

6

[quote=467975:@Enric Herrera]Well, in fact, if the window is open I want to close it, but if it’s not, then open it.

I just receive the window’s name[/quote]
the name is not unique though
it is IF you only ever open one instance
as soon as you have a second its name is the same and now you have problems

7

Thw window’s name (subclass name) no the title.
And yes there is only one instance of each class, because if received it as open, then I close it.

Probably I’m not asking correctly the question.

Var w as new myWindowType w.show

If I receive a string with the subclass name: “myWindowType” how may I

Var w as new ????? w.show

9

I don’t recommend using this but you can construct a class like this way:
http://documentation.xojo.com/api/language/const.htmlructorInfo

Bottom of the page. You may want to check if the name is the class name then call invoke it’s constructor

10

Ok, thaks to all, I see it was not a good idea, I’ll continue with the select case.