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Core File: Lazy load contents of the value panel
This is kind of a downgrade from what we have had before. We no longer use a progress monitor to show the progress, but it won't at least grab the focus by showing a modal dialog every time a mesh is opened.
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212 changes: 212 additions & 0 deletions
212
modules/decima-ui/src/main/java/com/shade/decima/ui/data/ValueViewerPanel.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,212 @@ | ||
| package com.shade.decima.ui.data; | ||
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| import com.shade.platform.model.Disposable; | ||
| import com.shade.platform.model.runtime.ProgressMonitor; | ||
| import com.shade.platform.ui.icons.LoadingIcon; | ||
| import com.shade.util.NotNull; | ||
| import net.miginfocom.swing.MigLayout; | ||
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| import javax.swing.*; | ||
| import java.awt.*; | ||
| import java.awt.event.HierarchyEvent; | ||
| import java.util.concurrent.Future; | ||
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| /** | ||
| * Represents a panel that displays a value viewer with a support for asynchronous reload. | ||
| */ | ||
| public class ValueViewerPanel extends JComponent implements Disposable { | ||
| private static final int DELAY_BEFORE_SHOWING_LOADER_MS = 100; | ||
| private static final String PAGE_LOADING = "loading"; | ||
| private static final String PAGE_VIEWER = "viewer"; | ||
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| public interface Callback { | ||
| void viewerChanged(@NotNull ValueViewerPanel panel); | ||
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| void viewerClosed(@NotNull ValueViewerPanel panel); | ||
| } | ||
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| private ValueViewer currentViewer; | ||
| private JComponent currentComponent; | ||
| private SwingWorker<?, ?> currentWorker; | ||
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| public ValueViewerPanel() { | ||
| setLayout(new CardLayout()); | ||
| setPreferredSize(new Dimension(400, 400)); | ||
| } | ||
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| /** | ||
| * Updates the current viewer, optionally swapping it with a supplied {@code viewer}, with the given {@code controller}. | ||
| * | ||
| * @param viewer the viewer to use | ||
| * @param controller the value controller to supply to the viewer | ||
| * @param callback the callback to notify about the viewer changes | ||
| */ | ||
| public void update(@NotNull ValueViewer viewer, @NotNull ValueController<?> controller, @NotNull Callback callback) { | ||
| final boolean viewerChanged = currentViewer != viewer; | ||
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| if (viewerChanged) { | ||
| if (currentComponent instanceof Disposable d) { | ||
| d.dispose(); | ||
| } | ||
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| currentViewer = viewer; | ||
| currentComponent = viewer.createComponent(); | ||
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| add(currentComponent, PAGE_VIEWER); | ||
| callback.viewerChanged(this); | ||
| } | ||
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| final CardLayout layout = (CardLayout) getLayout(); | ||
| layout.show(this, PAGE_VIEWER); | ||
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| final SwingWorker<?, ?> worker = currentWorker; | ||
| if (worker != null) { | ||
| worker.cancel(false); | ||
| } | ||
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| currentWorker = new SwingWorker<>() { | ||
| @Override | ||
| protected Object doInBackground() { | ||
| currentViewer.refresh(new MyProgressMonitor(this), currentComponent, controller); | ||
| return null; | ||
| } | ||
|
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| @Override | ||
| protected void done() { | ||
| if (isCancelled()) { | ||
| callback.viewerClosed(ValueViewerPanel.this); | ||
| } else { | ||
| layout.show(ValueViewerPanel.this, PAGE_VIEWER); | ||
| } | ||
|
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| currentWorker = null; | ||
| } | ||
| }; | ||
| currentWorker.execute(); | ||
|
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| final long start = System.currentTimeMillis(); | ||
| SwingUtilities.invokeLater(new Runnable() { | ||
| @Override | ||
| public void run() { | ||
| if (currentWorker == null || currentWorker.isDone() || currentWorker.isCancelled()) { | ||
| return; | ||
| } | ||
| if (System.currentTimeMillis() - start > DELAY_BEFORE_SHOWING_LOADER_MS) { | ||
| final JPanel inner = new JPanel(); | ||
| inner.setLayout(new GridBagLayout()); | ||
| inner.add(new LoadingPane(currentWorker)); | ||
|
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| add(inner, PAGE_LOADING); | ||
| layout.show(ValueViewerPanel.this, PAGE_LOADING); | ||
| } else { | ||
| SwingUtilities.invokeLater(this); | ||
| } | ||
| } | ||
| }); | ||
| } | ||
|
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| @Override | ||
| public void dispose() { | ||
| if (currentComponent instanceof Disposable d) { | ||
| d.dispose(); | ||
| } | ||
|
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| final SwingWorker<?, ?> worker = currentWorker; | ||
| if (worker != null) { | ||
| worker.cancel(false); | ||
| } | ||
|
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| currentViewer = null; | ||
| currentComponent = null; | ||
| currentWorker = null; | ||
|
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| removeAll(); | ||
| } | ||
|
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| private static class LoadingPane extends JComponent { | ||
| public LoadingPane(@NotNull Future<?> future) { | ||
| final LoadingIcon icon = new LoadingIcon(); | ||
| final JLabel label = new JLabel("Loading\u2026", icon, SwingConstants.LEADING); | ||
|
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| final Timer timer = new Timer(1000 / LoadingIcon.SEGMENTS, e -> { | ||
| label.repaint(); | ||
| icon.advance(); | ||
| }); | ||
|
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| label.addHierarchyListener(e -> { | ||
| if (e.getID() == HierarchyEvent.HIERARCHY_CHANGED && (e.getChangeFlags() & HierarchyEvent.SHOWING_CHANGED) != 0) { | ||
| if (label.isShowing()) { | ||
| timer.start(); | ||
| } else { | ||
| timer.stop(); | ||
| } | ||
| } | ||
| }); | ||
|
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| final JButton button = new JButton("Cancel"); | ||
| button.addActionListener(e -> { | ||
| button.setEnabled(false); | ||
| future.cancel(false); | ||
| }); | ||
|
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| setLayout(new MigLayout("ins panel,wrap", "[center]")); | ||
| add(label); | ||
| add(button); | ||
| } | ||
| } | ||
|
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| private static class MyProgressMonitor implements ProgressMonitor { | ||
| private final Future<?> future; | ||
|
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| public MyProgressMonitor(@NotNull Future<?> future) { | ||
| this.future = future; | ||
| } | ||
|
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| @NotNull | ||
| @Override | ||
| public IndeterminateTask begin(@NotNull String title) { | ||
| return new MyTask(this); | ||
| } | ||
|
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| @NotNull | ||
| @Override | ||
| public Task begin(@NotNull String title, int total) { | ||
| return new MyTask(this); | ||
| } | ||
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| private static class MyTask implements Task { | ||
| private final MyProgressMonitor monitor; | ||
|
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| public MyTask(@NotNull MyProgressMonitor monitor) { | ||
| this.monitor = monitor; | ||
| } | ||
|
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| @NotNull | ||
| @Override | ||
| public ProgressMonitor split(int ticks) { | ||
| return new MyProgressMonitor(monitor.future); | ||
| } | ||
|
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| @Override | ||
| public void worked(int ticks) { | ||
| // do nothing | ||
| } | ||
|
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| @Override | ||
| public void close() { | ||
| // do nothing | ||
| } | ||
|
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| @Override | ||
| public boolean isCanceled() { | ||
| return monitor.future.isCancelled(); | ||
| } | ||
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| @NotNull | ||
| @Override | ||
| public String title() { | ||
| return ""; | ||
| } | ||
| } | ||
| } | ||
| } |
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