B4J Question Create Custom Shortcut Key

[cambopad]

Hi all!

How can I create custom shortcut keys for my program made with B4J to do something when the user pressed the combination of keys?
For example, if the users pressed Ctrl+O, I want to show a form or just do something that I want.

Can anyone share me some tips?

 

[Cableguy]

You can use a menubar wich can integrate combo keys shortcuts like the one you mentioned... Or try to catch the form keys pressed events and figure out wich keys were pressed

 

[Daestrum]

needs javaobject library

Sub Process_Globals
  Private fx As JFX
  Private MainForm As Form
  Dim otherform As Form
End Sub

Sub AppStart (Form1 As Form, Args() As String)
  MainForm = Form1
  MainForm.Show
  asJO(Me).RunMethod("doWindow",Array(asJO(MainForm).GetFieldJO("stage")))
End Sub

Sub myevent_newwindow
  otherform.Initialize("",200,200)
  otherform.show
End Sub

Sub asJO(o As JavaObject) As JavaObject
  Return o
End Sub

#if java
import javafx.scene.input.KeyCode;
import javafx.stage.Stage;
import javafx.scene.input.KeyEvent;
import javafx.event.EventHandler;
import anywheresoftware.b4a.keywords.Common;

public static void doWindow(Stage stage){
stage.addEventHandler(KeyEvent.KEY_PRESSED,new EventHandler<KeyEvent>(){
     @Override public void handle(KeyEvent keyEvent){
       if (keyEvent.isAltDown() && (keyEvent.getCode() !=KeyCode.ALT)){
         if (keyEvent.getCode() == KeyCode.W){ // ALT W for new window
           System.out.println("Alt + " + keyEvent.getCode());
           keyEvent.consume();
           ba.raiseEventFromUI(this, "myevent_newwindow", null);
          }
        }
      }
    }
  );
}
#end if

 

[Roycefer]

If you want your program to be able to react to key combos even when the program is not in focus, you can use this library: http://b4x.com/android/forum/threads/jnativehookb4j-for-intercepting-system-input-events.55826/ . This library has the added advantage that you can consume events so that they don't propagate through the operating system. This allows you to override system key combo actions with your own.

 

[Erel]

I think that a MenuItem as Cableguy wrote is the simplest solution.