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99 changes: 99 additions & 0 deletions
99
enigma-swing/src/main/java/cuchaz/enigma/gui/elements/NavigatorPanel.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,99 @@ | ||
| package cuchaz.enigma.gui.elements; | ||
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|
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| import cuchaz.enigma.gui.Gui; | ||
| import cuchaz.enigma.translation.representation.entry.Entry; | ||
|
|
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| import javax.annotation.Nullable; | ||
| import javax.swing.JButton; | ||
| import javax.swing.JLabel; | ||
| import javax.swing.JPanel; | ||
| import javax.swing.border.LineBorder; | ||
| import java.awt.Color; | ||
| import java.util.ArrayList; | ||
| import java.util.List; | ||
| import java.util.function.Function; | ||
|
|
||
| /** | ||
| * A panel with buttons to navigate to the next and previous items in its entry collection. | ||
| */ | ||
| public class NavigatorPanel extends JPanel { | ||
| private final Gui gui; | ||
| private final JLabel statsLabel; | ||
| private final List<Entry<?>> entries = new ArrayList<>(); | ||
| private final Function<Entry<?>, Boolean> validityChecker; | ||
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| private int currentIndex = 0; | ||
|
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| /** | ||
| * Creates a new navigator panel. | ||
| * @param gui the parent gui | ||
| * @param validityChecker a function that check if an entry should still be accessible from this panel. returns {@code true} if yes, or {@code false} if it should be removed | ||
| */ | ||
| public NavigatorPanel(Gui gui, Function<Entry<?>, Boolean> validityChecker) { | ||
| super(); | ||
| this.gui = gui; | ||
| this.validityChecker = validityChecker; | ||
| this.statsLabel = new JLabel("0/0"); | ||
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| JButton up = new JButton("up"); | ||
| up.addActionListener(event -> { | ||
| if (!this.entries.isEmpty()) { | ||
| this.currentIndex --; | ||
| if (this.currentIndex < 0) { | ||
| this.currentIndex = this.entries.size() - 1; | ||
| } | ||
|
|
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| this.tryNavigate(); | ||
| } | ||
| }); | ||
|
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| JButton down = new JButton("down"); | ||
| down.addActionListener(event -> { | ||
| if (!this.entries.isEmpty()) { | ||
| this.currentIndex ++; | ||
| if (this.currentIndex >= this.entries.size()) { | ||
| this.currentIndex = 0; | ||
| } | ||
|
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| this.tryNavigate(); | ||
| } | ||
| }); | ||
|
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| this.add(up); | ||
| this.add(down); | ||
| this.add(this.statsLabel); | ||
| this.setBorder(new LineBorder(Color.BLACK)); | ||
| } | ||
|
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| private void tryNavigate() { | ||
| this.checkForRemoval(this.entries.get(this.currentIndex)); | ||
| this.updateStatsLabel(); | ||
| this.gui.getController().navigateTo(this.entries.get(this.currentIndex)); | ||
| } | ||
|
|
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| /** | ||
| * Adds the entry if it's valid for this navigator. | ||
| * @param entry the entry to add | ||
| */ | ||
| public void tryAddEntry(@Nullable Entry<?> entry) { | ||
| if (entry != null && !this.entries.contains(entry) && this.validityChecker.apply(entry)) { | ||
| this.entries.add(entry); | ||
| this.statsLabel.setText((this.currentIndex + 1) + "/" + this.entries.size()); | ||
| } | ||
| } | ||
|
|
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| /** | ||
| * Checks if the entry should be removed, and if so handles removal and updates. | ||
| * @param target the entry to check | ||
| */ | ||
| public void checkForRemoval(Entry<?> target) { | ||
| if (!this.validityChecker.apply(target)) { | ||
| this.entries.remove(target); | ||
| this.updateStatsLabel(); | ||
| } | ||
| } | ||
|
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| private void updateStatsLabel() { | ||
| this.statsLabel.setText((this.currentIndex + 1) + "/" + this.entries.size()); | ||
| } | ||
| } |
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