componentShowingVar - a variable that always indicates if a component is showing (so you can query this without going to Swing thread) [1033722]

< > BotCompany Repo | #1033722 // componentShowingVar - a variable that always indicates if a component is showing (so you can query this without going to Swing thread)

JavaX fragment (include) [tags: use-pretranspiled]

static BoolVar componentShowingVar(JComponent component) {
  ret swing(-> {
    BoolVar flag = new(component.isShowing());
    
    component.addAncestorListener(new AncestorListener {
      public void ancestorAdded(AncestorEvent event) {
        if (flag!) print("Warning: bindToComponent logic failure");
        flag.set(true);
      }
  
      public void ancestorRemoved(AncestorEvent event) {
        if (!flag!) print("Warning: bindToComponent logic failure");
        flag.set(false);
      }
  
      public void ancestorMoved(AncestorEvent event) {
      }
    });
    
    ret flag;
  });
}

Author comment

Began life as a copy of #1003557

Travelled to 3 computer(s): bhatertpkbcr, mowyntqkapby, mqqgnosmbjvj

Snippet ID:

#1033722

Snippet name:

componentShowingVar - a variable that always indicates if a component is showing (so you can query this without going to Swing thread)

Eternal ID of this version:

#1033722/2

Text MD5:

87d73114aed138ac9158420e23f43f56

Transpilation MD5:

e7d0adb757b731ff3a9d38e08ed3c625

Author:

stefan

Category:

javax / gui

Type:

JavaX fragment (include)

Public (visible to everyone):

Yes

Archived (hidden from active list):

Created/modified:

2021-12-30 18:59:28

Source code size:

623 bytes / 22 lines

Pitched / IR pitched:

No / No

Views / Downloads:

565 / 694

Version history:

1 change(s)

Referenced in:

[show references]

1	static BoolVar componentShowingVar(JComponent component) {
2	ret swing(-> {
3	BoolVar flag = new(component.isShowing());
4
5	component.addAncestorListener(new AncestorListener {
6	public void ancestorAdded(AncestorEvent event) {
7	if (flag!) print("Warning: bindToComponent logic failure");
8	flag.set(true);
9	}
10
11	public void ancestorRemoved(AncestorEvent event) {
12	if (!flag!) print("Warning: bindToComponent logic failure");
13	flag.set(false);
14	}
15
16	public void ancestorMoved(AncestorEvent event) {
17	}
18	});
19
20	ret flag;
21	});
22	}