/*
 * Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.  Oracle designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Oracle in the LICENSE file that accompanied this code.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 * or visit www.oracle.com if you need additional information or have any
 * questions.
 */
package javafx.scene.control;

import com.sun.javafx.scene.control.skin.resources.ControlResources;
import javafx.application.Platform;
import javafx.beans.NamedArg;
import javafx.geometry.Pos;
import javafx.scene.control.ButtonBar.ButtonData;
import javafx.scene.layout.GridPane;
import javafx.scene.layout.Priority;
import javafx.scene.layout.Region;

/**
 * A dialog that shows a text input control to the user.
 *
 * @see Dialog
 * @since JavaFX 8u40
 */
public class TextInputDialog extends Dialog<String> {

    /**************************************************************************
     *
     * Fields
     *
     **************************************************************************/

    private final GridPane grid;
    private final Label label;
    private final TextField textField;
    private final String defaultValue;



    /**************************************************************************
     *
     * Constructors
     *
     **************************************************************************/

    /**
     * Creates a new TextInputDialog without a default value entered into the
     * dialog {@link TextField}.
     */
    public TextInputDialog() {
        this("");
    }

    /**
     * Creates a new TextInputDialog with the default value entered into the
     * dialog {@link TextField}.
     * @param defaultValue the default value entered into the dialog
     */
    public TextInputDialog(@NamedArg("defaultValue") String defaultValue) {
        final DialogPane dialogPane = getDialogPane();

        // -- textfield
        this.textField = new TextField(defaultValue);
        this.textField.setMaxWidth(Double.MAX_VALUE);
        GridPane.setHgrow(textField, Priority.ALWAYS);
        GridPane.setFillWidth(textField, true);

        // -- label
        label = DialogPane.createContentLabel(dialogPane.getContentText());
        label.setPrefWidth(Region.USE_COMPUTED_SIZE);
        label.textProperty().bind(dialogPane.contentTextProperty());

        this.defaultValue = defaultValue;

        this.grid = new GridPane();
        this.grid.setHgap(10);
        this.grid.setMaxWidth(Double.MAX_VALUE);
        this.grid.setAlignment(Pos.CENTER_LEFT);

        dialogPane.contentTextProperty().addListener(o -> updateGrid());

        setTitle(ControlResources.getString("Dialog.confirm.title"));
        dialogPane.setHeaderText(ControlResources.getString("Dialog.confirm.header"));
        dialogPane.getStyleClass().add("text-input-dialog");
        dialogPane.getButtonTypes().addAll(ButtonType.OK, ButtonType.CANCEL);

        updateGrid();

        setResultConverter((dialogButton) -> {
            ButtonData data = dialogButton == null ? null : dialogButton.getButtonData();
            return data == ButtonData.OK_DONE ? textField.getText() : null;
        });
    }



    /**************************************************************************
     *
     * Public API
     *
     **************************************************************************/

    /**
     * Returns the {@link TextField} used within this dialog.
     * @return the {@link TextField} used within this dialog
     */
    public final TextField getEditor() {
        return textField;
    }

    /**
     * Returns the default value that was specified in the constructor.
     * @return the default value that was specified in the constructor
     */
    public final String getDefaultValue() {
        return defaultValue;
    }



    /**************************************************************************
     *
     * Private Implementation
     *
     **************************************************************************/

    private void updateGrid() {
        grid.getChildren().clear();

        grid.add(label, 0, 0);
        grid.add(textField, 1, 0);
        getDialogPane().setContent(grid);

        Platform.runLater(() -> textField.requestFocus());
    }
}