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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,80 @@ | ||
| package ui.components; | ||
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| import java.util.List; | ||
| import java.util.Optional; | ||
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| import javafx.event.ActionEvent; | ||
| import javafx.event.EventHandler; | ||
| import javafx.scene.control.ContextMenu; | ||
| import javafx.scene.control.CustomMenuItem; | ||
| import javafx.scene.control.Label; | ||
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| /** | ||
| * Pop-up menu that appears with suggestions for auto-completion | ||
| * | ||
| */ | ||
| public class SuggestionMenu extends ContextMenu { | ||
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| private final int maxEntries; | ||
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| // Selected menu item's content | ||
| private Optional<String> selected = Optional.empty(); | ||
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| // Callback functions | ||
| private EventHandler<ActionEvent> actionHandler = (event) -> defaultActionHandler(event); | ||
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| public SuggestionMenu(int maxEntries) { | ||
| this.maxEntries = maxEntries; | ||
| } | ||
|
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| /** | ||
| * Load search result in menu | ||
| * @param searchResult | ||
| */ | ||
| public void loadSuggestions(List<String> searchResult) { | ||
| getItems().clear(); | ||
| searchResult.stream().limit(maxEntries).forEach(this::addMenuItem); | ||
| selected = searchResult.stream().findFirst(); | ||
| } | ||
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| /** | ||
| * Get content of selected menu item | ||
| */ | ||
| public Optional<String> getSelectedContent() { | ||
| return selected; | ||
| } | ||
|
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| /** | ||
| * Wraps a label inside a menu item. | ||
| */ | ||
| private void addMenuItem(String content) { | ||
| Label label = new Label(content); | ||
| CustomMenuItem item = new CustomMenuItem(label, false); | ||
| item.setText(content); | ||
| getItems().add(item); | ||
| item.setOnAction(this.actionHandler); | ||
| assert getItems().size() <= maxEntries; | ||
| } | ||
|
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| /** | ||
| * Sets selected content to event's source and hide the menu | ||
| * @param event | ||
| */ | ||
| private void defaultActionHandler(ActionEvent event) { | ||
| selected = getTextOnAction(event); | ||
| hide(); | ||
| } | ||
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| /** | ||
| * @param event | ||
| * @return text content from an event's source | ||
| */ | ||
| public static Optional<String> getTextOnAction(ActionEvent event) { | ||
| return Optional.of(((CustomMenuItem) event.getSource()).getText()); | ||
| } | ||
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| public SuggestionMenu setActionHandler(EventHandler<ActionEvent> actionHandler) { | ||
| this.actionHandler = actionHandler; | ||
| return this; | ||
| } | ||
| } |
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