TemplateSkin.java

/*
 * Copyright (c) 2014. by Gerrit Grunwald
 *  
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package jfx8controls.templates.code;

import javafx.scene.control.Skin;
import javafx.scene.control.SkinBase;
import javafx.scene.layout.Pane;
import javafx.scene.layout.Region;


/**
 * User: hansolo
 * Date: 13.02.14
 * Time: 11:42
 */
public class TemplateSkin extends SkinBase<Template> implements Skin<Template> {
    private static final double PREFERRED_WIDTH  = 150;
    private static final double PREFERRED_HEIGHT = 150;
    private static final double MINIMUM_WIDTH    = 5;
    private static final double MINIMUM_HEIGHT   = 5;
    private static final double MAXIMUM_WIDTH    = 1024;
    private static final double MAXIMUM_HEIGHT   = 1024;
    
    private double size;    // current smallest dimension
    private double width;   // current width
    private double height;  // current height
    private Region sample;  // sample region
    private Pane   pane;    // main layout container that holds all your nodes


    // ******************** Constructors **************************************
    public TemplateSkin(final Template CONTROL) {
        super(CONTROL);
        init();
        initGraphics();
        registerListeners();
    }

    private void init() {
        if (Double.compare(getSkinnable().getPrefWidth(), 0.0) <= 0 || Double.compare(getSkinnable().getPrefHeight(), 0.0) <= 0 ||
            Double.compare(getSkinnable().getWidth(), 0.0) <= 0 || Double.compare(getSkinnable().getHeight(), 0.0) <= 0) {
            if (getSkinnable().getPrefWidth() > 0 && getSkinnable().getPrefHeight() > 0) {
                getSkinnable().setPrefSize(getSkinnable().getPrefWidth(), getSkinnable().getPrefHeight());
            } else {
                getSkinnable().setPrefSize(PREFERRED_WIDTH, PREFERRED_HEIGHT);
            }
        }
        if (Double.compare(getSkinnable().getMinWidth(), 0.0) <= 0 || Double.compare(getSkinnable().getMinHeight(), 0.0) <= 0) {
            getSkinnable().setMinSize(MINIMUM_WIDTH, MINIMUM_HEIGHT);
        }
        if (Double.compare(getSkinnable().getMaxWidth(), 0.0) <= 0 || Double.compare(getSkinnable().getMaxHeight(), 0.0) <= 0) {
            getSkinnable().setMaxSize(MAXIMUM_WIDTH, MAXIMUM_HEIGHT);
        }
    }

    private void initGraphics() {
        // Setup the scene graph of your control here

        sample = new Region();
        sample.getStyleClass().setAll("sample-style");

        pane = new Pane(sample /* ADD ALL YOUR NODES TO THIS PANE */);

        getChildren().setAll(pane);
    }

    private void registerListeners() {
        getSkinnable().widthProperty().addListener(observable -> handleControlPropertyChanged("RESIZE") );
        getSkinnable().heightProperty().addListener(observable -> handleControlPropertyChanged("RESIZE"));
        /* ADD LISTENERS TO YOUR PROPERTIES BELOW THIS */
    }


    // ******************** Methods *******************************************
    protected void handleControlPropertyChanged(final String PROPERTY) {
        if ("RESIZE".equals(PROPERTY)) {
            resize();
        }
    }


    // ******************** Resizing ******************************************
    private void resize() {
        width  = getSkinnable().getWidth();
        height = getSkinnable().getHeight();
        size   = width < height ? width : height;

        if (width > 0 && height > 0) {
            pane.setMaxSize(size, size);
            pane.relocate((width - size) * 0.5, (height - size) * 0.5);
            
            /* RESIZE AND RELOCATE YOUR NODES BELOW THIS */
            sample.setPrefSize(0.5 * size, 0.5 * size);
            sample.relocate(0.25 * size, 0.25 * size);
        }
    }
}