Delphi: disable 1 Action from Action List

Question

It is funny :) but how to do something like ActionList1.MyAction.Enable:=false?

An Action List has actions for buttons, if a button is invisible I need to disable it's action (if not to do this and pres a shortcut then a procedure will be performed).

May be I do something wrong, but I did not assign actions to buttons. I have only an Action List with Actions. Each action has a shortcut. When this shortcut is pressed then the action is executed and it performs a procedure. If to click on the button -> the same procedure will be performed too.

State:=asSuspended is for a whole Action List.

Thanks!!!

Suppose you have a button, button1, with its Action property set to myAction. If you want the button to be invisible then you simply set myAction.Visible := False. This results in the action not being invokeable. Now, your question makes hardly any sense at all in its current state and I expect this comment isn't what you are looking for. I recommend that you try to explain your problem more clearly. — David Heffernan
@David - With a simple test, setting visibility of an action to false does not seem to prevent the action executing with a shortcut. — Sertac Akyuz
@David: to make an action uninvokable you need to disable it, or nil its onexecute handler (provided DisableIfNoHandler is true, the default). Visibility is not checked in TCustomAction's Execute method (nor in its ancestors). — Marjan Venema

David Heffernan David Heffernan · Accepted Answer · 2011-07-19T18:15:28

You should assign the button's Action property and control everything via the action. Set the action to be disabled, invisible etc. and the button follows suit.

Don't set the OnClick event handler of the button, instead use the corresponding event of the action. Use the action's OnUpdate event to set properties like Visible, Enabled etc., basically everything that changes at runtime.

Delphi: disable 1 Action from Action List

2 Answers