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JIDE Common Layer (Professional Swing Components)
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/*
 * @(#)IntelliHints.java 7/24/2005
 *
 * Copyright 2002 - 2005 JIDE Software Inc. All rights reserved.
 */
package com.jidesoft.hints;

import javax.swing.*;

/**
 * IntelliHints is an interface that defines all necessary methods to implement showing a hint popup
 * depending on a context and allows user to pick from a list of hints. {@link #createHintsComponent()} will create a
 * component that contains the hints. It will be shown in a popup window. After hint popup is created, {@link
 * #updateHints(Object, boolean)} will update the content of hints based on the context. Once user picks a hint from the hint
 * popup, {@link #getSelectedHint()} will be called to find the hint that user selected and call {@link
 * #acceptHint(Object)} to accept it.
 */
public interface IntelliHints {
    /**
     * The key of a client property. If a component has IntelliHints registered, you can use this client property to get
     * the IntelliHints instance.
     */
    String CLIENT_PROPERTY_INTELLI_HINTS = "INTELLI_HINTS"; //NOI18N

    /**
     * Creates the component which contains hints. At this moment, the content should be empty. Following call {@link
     * #updateHints(Object, boolean)} will update the content.
     *
     * @return the component which will be used to display the hints.
     */
    JComponent createHintsComponent();

    /**
     * Update hints depending on the context. This method will be triggered for every key typed event in the text
     * component. Subclass can override it to provide your own list of hints and call setListData to set it and returns
     * true after that.
     *
     * @param context the current context
     *
     * @return true or false. If it is false, hint popup will not be shown.
     * @deprecated replaced it by {{@link #updateHints(Object, boolean)}}
     */
    @Deprecated
    boolean updateHints(Object context);

    /**
     * Update hints depending on the context. This method will be triggered for every key typed event in the text
     * component. Subclass can override it to provide your own list of hints and call setListData to set it and returns
     * true after that.
     *
     * @param context   the current context
     * @param autoPopup true or false. If true, it means this method was called through the auto-popup feature because
     *                  of the show hint timer is triggered. If false, it means user pressed the show hint key stroke to
     *                  show the popup.
     *
     * @return true or false. If it is false, hint popup will not be shown.
     */
    boolean updateHints(Object context, boolean autoPopup);

    /**
     * Gets the selected value. This value will be used to complete the text component.
     *
     * @return the selected value.
     */
    Object getSelectedHint();

    /**
     * Accepts the selected hint. Subclass can implements to decide how the new hint be set to the text component.
     *
     * @param hint the hint to be accepted.
     */
    void acceptHint(Object hint);
}