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1 | sclass ButtonImageLoader {
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2 | DynamicStack stack; |
3 | Set<JButton> loadedButtons = weakIdentityHashSet(); |
4 | DeQ loadQ; |
5 | JScrollPane scrollPane; |
6 | ChangeListener changeListener; |
7 | settable int imageHeight = 128; |
8 | |
9 | *(DynamicStack *stack) {
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10 | bindToComponent(stack, -> {
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11 | scrollPane = enclosingScrollPane(stack); |
12 | changeListener = scrollPaneOnScroll(scrollPane, r { update() });
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13 | update(); |
14 | }, -> {
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15 | if (scrollPane != null) {
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16 | scrollPane.getViewport().removeChangeListener(changeListener); |
17 | scrollPane = null; |
18 | changeListener = null; |
19 | } |
20 | }); |
21 | } |
22 | |
23 | void update() swing {
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24 | //new L<Runnable> l; |
25 | for (JButton b : reversed((L<JButton>) (L) stackElementsShowing(stack))) {
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26 | //if (add(loadedButtons, b)) pcall { // will strangely not work
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27 | if (add_byContains(loadedButtons, b)) pcall {
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28 | TextImageAction tia = cast metaGet(b, TextImageAction.class); |
29 | if (tia == null) continue with print("no tia");
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30 | File f = tia.file; |
31 | if (f == null) continue with print("no file");
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32 | qAdd(r { setAButtonsImage(b, f) });
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33 | } |
34 | } |
35 | //if (nempty(l)) qAdd(chainRunnables_pcall(l)); |
36 | } |
37 | |
38 | void qAdd(Runnable r) {
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39 | if (loadQ == null) loadQ = startDeQ(); |
40 | loadQ.addFirst(r); |
41 | } |
42 | |
43 | // overridable |
44 | void setAButtonsImage(JButton b, File f) {
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45 | setButtonImage(b, loadPreviewImage(f)); |
46 | //print("Loaded: " + f);
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47 | } |
48 | |
49 | // overridable |
50 | BufferedImage loadPreviewImage(File f) {
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51 | ret loadPreviewImageWithExactHeight(imageHeight, f); |
52 | } |
53 | } |
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| Snippet ID: | #1015389 |
| Snippet name: | ButtonImageLoader - for buttons that represent images on disk |
| Eternal ID of this version: | #1015389/19 |
| Text MD5: | 667a79683467fa7e64b72d508a59dfe3 |
| Transpilation MD5: | e29a1c6a5cc4bb412931bc9e6e15271a |
| Author: | stefan |
| Category: | javax / gui |
| Type: | JavaX fragment (include) |
| Public (visible to everyone): | Yes |
| Archived (hidden from active list): | No |
| Created/modified: | 2022-02-15 21:51:52 |
| Source code size: | 1591 bytes / 53 lines |
| Pitched / IR pitched: | No / No |
| Views / Downloads: | 428 / 1022 |
| Version history: | 18 change(s) |
| Referenced in: | [show references] |