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1 | static <A extends JComponent> A bindToComponent(A component, Runnable onShow, Runnable onUnShow) {
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2 | swing {
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3 | final Var<Bool> flag = new(false); |
4 | component.addAncestorListener(new AncestorListener {
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5 | public void ancestorAdded(AncestorEvent event) {
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6 | if (flag!) print("Warning: bindToComponent logic failure");
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7 | flag.set(true); |
8 | pcallF(onShow); |
9 | } |
10 | |
11 | public void ancestorRemoved(AncestorEvent event) {
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12 | if (!flag!) print("Warning: bindToComponent logic failure");
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13 | flag.set(false); |
14 | pcallF(onUnShow); |
15 | } |
16 | |
17 | public void ancestorMoved(AncestorEvent event) {
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18 | } |
19 | }); |
20 | if (component.isShowing()) { // Hopefully this matches the AncestorListener logic
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21 | flag.set(true); |
22 | pcallF(onShow); |
23 | } |
24 | } |
25 | ret component; |
26 | } |
27 | |
28 | static <A extends JComponent> A bindToComponent(A component, Runnable onShow) {
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29 | ret bindToComponent(component, onShow, null); |
30 | } |
31 | |
32 | // passing a value from onShow to onUnShow |
33 | static <A extends JComponent, B> A bindToComponent(A component, IF0<B> onShow, IVF1<B> onUnShow) {
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34 | new Var<B> b; |
35 | ret bindToComponent(component, |
36 | -> b.set(onShow!), |
37 | -> { try { onUnShow.get(b!); } finally { b.set(null); } });
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38 | } |
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| Snippet ID: | #1003557 |
| Snippet name: | bindToComponent - do something on showing/un-showing of component |
| Eternal ID of this version: | #1003557/11 |
| Text MD5: | d968de24ade4872e27f05d7fe1308e2e |
| Transpilation MD5: | 6974a8b4ef539d2f9d33407ad0870c5f |
| Author: | stefan |
| Category: | javax / gui |
| Type: | JavaX fragment (include) |
| Public (visible to everyone): | Yes |
| Archived (hidden from active list): | No |
| Created/modified: | 2022-12-20 16:44:29 |
| Source code size: | 1255 bytes / 38 lines |
| Pitched / IR pitched: | No / No |
| Views / Downloads: | 708 / 796 |
| Version history: | 10 change(s) |
| Referenced in: | [show references] |