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 * Copyright (c) 2008, 2016, Oracle and/or its affiliates.
 * All rights reserved. Use is subject to license terms.
 *
 * This file is available and licensed under the following license:
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 *  - Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *  - Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the distribution.
 *  - Neither the name of Oracle Corporation nor the names of its
 *    contributors may be used to endorse or promote products derived
 *    from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY_EVENT EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY_EVENT DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
package ensemble.samples.controls.text.textvalidator;

import javafx.beans.property.ObjectProperty;
import javafx.beans.property.ReadOnlyObjectProperty;
import javafx.beans.property.ReadOnlyObjectWrapper;
import javafx.beans.property.SimpleObjectProperty;
import javafx.beans.value.ObservableValue;
import javafx.event.EventHandler;
import javafx.scene.control.Control;
import javafx.scene.layout.Region;

public abstract class ValidatorPane<C extends Control> extends Region {

    /**
     * The content for the validator pane is the control it should work with.
     */
    private ObjectProperty<C> content =
        new SimpleObjectProperty<C>(this, "content", null);

    public final C getContent() {
        return content.get();
    }

    public final void setContent(C value) {
        content.set(value);
    }

    public final ObjectProperty<C> contentProperty() {
        return content;
    }
    /**
     * The validator
     */
    private ObjectProperty<Validator<C>> validator =
        new SimpleObjectProperty<Validator<C>>(this, "validator");

    public final Validator<C> getValidator() {
        return validator.get();
    }

    public final void setValidator(Validator<C> value) {
        validator.set(value);
    }

    public final ObjectProperty<Validator<C>> validatorProperty() {
        return validator;
    }
    /**
     * The validation result
     */
    private ReadOnlyObjectWrapper<ValidationResult> validationResult =
        new ReadOnlyObjectWrapper<ValidationResult>(this, "validationResult");

    public final ValidationResult getValidationResult() {
        return validationResult.get();
    }

    public final ReadOnlyObjectProperty<ValidationResult> validationResultProperty() {
        return validationResult.getReadOnlyProperty();
    }
    /**
     * The event handler
     */
    private ObjectProperty<EventHandler<ValidationEvent>> onValidation =
        new SimpleObjectProperty<EventHandler<ValidationEvent>>(this,
                                                                "onValidation");

    public final EventHandler<ValidationEvent> getOnValidation() {
        return onValidation.get();
    }

    public final void setOnValidation(EventHandler<ValidationEvent> value) {
        onValidation.set(value);
    }

    public final ObjectProperty<EventHandler<ValidationEvent>> onValidationProperty() {
        return onValidation;
    }

    public ValidatorPane() {
        content.addListener((ObservableValue<? extends Control> ov,
                             Control oldValue, Control newValue) -> {
            if (oldValue != null) {
                getChildren().remove(oldValue);
            }
            if (newValue != null) {
                getChildren().add(0, newValue);
            }
        });
    }

    protected void handleValidationResult(ValidationResult result) {
        getStyleClass().removeAll("validation-error", "validation-warning");
        if (result != null) {
            if (result.getType() == ValidationResult.Type.ERROR) {
                getStyleClass().add("validation-error");
            } else if (result.getType() == ValidationResult.Type.WARNING) {
                getStyleClass().add("validation-warning");
            }
        }
        validationResult.set(result);
        fireEvent(new ValidationEvent(result));
    }

    @Override
    protected void layoutChildren() {
        Control c = content.get();
        if (c != null) {
            c.resizeRelocate(0, 0, getWidth(), getHeight());
        }
    }

    @Override
    protected double computeMaxHeight(double d) {
        Control c = content.get();
        return c == null ? super.computeMaxHeight(d) : c.maxHeight(d);
    }

    @Override
    protected double computeMinHeight(double d) {
        Control c = content.get();
        return c == null ? super.computeMinHeight(d) : c.minHeight(d);
    }

    @Override
    protected double computePrefHeight(double d) {
        Control c = content.get();
        return c == null ? super.computePrefHeight(d) : c.prefHeight(d);
    }

    @Override
    protected double computePrefWidth(double d) {
        Control c = content.get();
        return c == null ? super.computePrefWidth(d) : c.prefWidth(d);
    }

    @Override
    protected double computeMaxWidth(double d) {
        Control c = content.get();
        return c == null ? super.computeMaxWidth(d) : c.maxWidth(d);
    }

    @Override
    protected double computeMinWidth(double d) {
        Control c = content.get();
        return c == null ? super.computeMinWidth(d) : c.minWidth(d);
    }
}