ButtonIconLoader - load the "lazy" icon from network or disk [1016105]

sclass ButtonIconLoader {
  DynamicStack stack;
  Set<JButton> loadedButtons = weakIdentityHashSet();
  DeQ loadQ;
  JScrollPane scrollPane;
  ChangeListener changeListener;

  *(final DynamicStack *stack) {
    bindToComponent(stack, r {
      scrollPane = enclosingScrollPane(stack);
      changeListener = scrollPaneOnScroll(scrollPane, r { update() });
      update();
    }, r {
      if (scrollPane != null) {
        scrollPane.getViewport().removeChangeListener(changeListener);
        scrollPane = null;
        changeListener = null;
      }
    });
  }
  
  void update() swing {
    for (final JButton b : reversed((L<JButton>) (L) stackElementsShowing(stack))) {
      if (add_byContains(loadedButtons, b)) pcall {
        TextImageAction tia = cast metaGet(TextImageAction.class, b);
        fS imageID = (S) mapGet(tia.more, 'lazyImageID);
        if (empty(imageID)) continue;
        qAdd(r {
          setButtonImage(b,
            scaleBufferedImageToMaxWidthOrHeight(loadImage2(imageID), niceButtons_maxImageSize());
        });
      }
    }
  }
  
  void qAdd(Runnable r) {
    if (loadQ == null) loadQ = startDeQ();
    loadQ.addFirst(r);
  }
}

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Snippet ID:	#1016105
Snippet name:	ButtonIconLoader - load the "lazy" icon from network or disk
Eternal ID of this version:	#1016105/5
Text MD5:	030f9527c8385aedd23e4195b37cc264
Author:	stefan
Category:	javax / gui
Type:	JavaX fragment (include)
Public (visible to everyone):	Yes
Archived (hidden from active list):	No
Created/modified:	2022-02-12 22:08:13
Source code size:	1209 bytes / 40 lines
Pitched / IR pitched:	No / No
Views / Downloads:	385 / 957
Version history:	4 change(s)
Referenced in:	[show references]

< > BotCompany Repo | #1016105 // ButtonIconLoader - load the "lazy" icon from network or disk

JavaX fragment (include)

Author comment

1	sclass ButtonIconLoader {
2	DynamicStack stack;
3	Set<JButton> loadedButtons = weakIdentityHashSet();
4	DeQ loadQ;
5	JScrollPane scrollPane;
6	ChangeListener changeListener;
7
8	(final DynamicStack stack) {
9	bindToComponent(stack, r {
10	scrollPane = enclosingScrollPane(stack);
11	changeListener = scrollPaneOnScroll(scrollPane, r { update() });
12	update();
13	}, r {
14	if (scrollPane != null) {
15	scrollPane.getViewport().removeChangeListener(changeListener);
16	scrollPane = null;
17	changeListener = null;
18	}
19	});
20	}
21
22	void update() swing {
23	for (final JButton b : reversed((L<JButton>) (L) stackElementsShowing(stack))) {
24	if (add_byContains(loadedButtons, b)) pcall {
25	TextImageAction tia = cast metaGet(TextImageAction.class, b);
26	fS imageID = (S) mapGet(tia.more, 'lazyImageID);
27	if (empty(imageID)) continue;
28	qAdd(r {
29	setButtonImage(b,
30	scaleBufferedImageToMaxWidthOrHeight(loadImage2(imageID), niceButtons_maxImageSize());
31	});
32	}
33	}
34	}
35
36	void qAdd(Runnable r) {
37	if (loadQ == null) loadQ = startDeQ();
38	loadQ.addFirst(r);
39	}
40	}