Class helper for updating a TActionList

On occasions I've wanted to provoke all actions in an action list to update themselves - when waiting for the application to update them when idle isn't soon enough.

I would have thought that TActionList would have a suitable method, but it doesn't seem to.

To save having to come up with the same hack over and again, I've started using this class helper:

type
  TActionListHelper = class helper for TCustomActionList
  public
    procedure Update;
  end;
...
procedure TActionListHelper.Update;
var
  Action: TContainedAction;
begin
  for Action in Self do
    Action.Update;
end;
You can now update all the actions in an action list by calling the Update that has been injected into any TActionList instance.
Seems to work so I thought I'd share it.
If you've got a better way, please comment.
Source code highlighting by DelphiDabbler PasHi.







































Comments











Post a Comment


Comments are very welcome, but please don't comment here if:

1) You have a query about, or a bug report for, one of my programs or libraries. Most of my posts contain a link to the relevant repository where there will be an issue tracker you can use.

2) You have a query about any 3rd party programs I feature, please address them to the  developer(s) - there will be a link in the post.

3) You're one of the tiny, tiny minority who are aggressive or abusive - in the bin you go and reported you will be!

Thanks






























Popular posts from this blog









Deleting elements from a dynamic array





















In my blog " Initialising Dynamic Arrays " I mentioned I have been writing some unit tests that needed numerous repetative array initialisation operations. Well, one of the other common operations I found myself writing was the deletion of items from dynamic arrays. So I decided to find a generic way of doing this.   Assuming we know the index of the item to be deleted we need the equivalent of Delphi's built-in Delete  procedure for strings. If you read the previous post  you won't be surprised to learn that I decided to further extend the Generics.Collections.TArray  class by adding to the TArrayEx  class I introduced there.   My first attempt emulates Delphi's Delete  procedure by deleting the array element in-place: i.e. it updates the array passed as a parameter. Unsurprisingly the method is called DeleteInPlace . Here's how it goes:     type    TArrayEx  =  class ( TArray )    public      .. .      class  procedure  DeleteInPlace < T > ( var  A :  








Read more










Initialising dynamic arrays





















When writing some unit tests a while ago I found myself needing to initialise some dynamic arrays with test data. It would be nice if we could do something like this:    var    A :  array  of  Integer ;  begin    A  :=  ( 1 , 2 , 3 , 4 ) ;   // !! WRONG  end ;    but we can't. So I decided to write some functions to initialise dynamic arrays to the contents of another array, be it a constant, a literal or another dynamic array.   The result was a set of overloaded routines, one for each data type I needed to handle, for example for Integer  and string  arrays I had:     function  CloneArray ( const  A :  array  of  Integer ) :  TIntegerDynArray ;  overload ;  var    Idx :  Integer ;  begin    SetLength ( Result ,  Length ( A ) ) ;    for  Idx  :=  Low ( A )  to  High ( A )  do      Result [ Idx  -  Low ( A ) ]  :=  A [ Idx ] ;  end ;   function  CloneArray ( const  A :  array  of  string ) :  TStringDynArray ;  overload ;  var    Idx :  Integer ;  begin    SetLength ( Result ,  Len








Read more










New String Property Editor Planned For RAD Studio 12 Yukon 🤞




















Image







This blog post is based on a pre-release version of the RAD Studio software and it has been written with specific permission by Embarcadero. No feature is committed until the product GA release. It seems I'm getting very excited about multi-line strings of late. My previous post was about multi-line string literals for Delphi  and this time I'm talking about the new multi-line string property editor being slated for the RAD Studio 12 IDE. For more years than I care to remember, I've been frustrated by the inability to enter multi-line strings in the Delphi IDE object inspector. That meant having to resort to code to initialise some multi-line labels. So frustrated was I that I wrote a little property editor of my own ( stringpe ), way back in 2004. It's still around and on GitHub. Here's what it (sometimes) looks like: Yeah, I know this is Vista - I used an old screenshot Sometimes? Well it looked like that until it got installed on DPI aware Delphis, and then it sh








Read more