HeatMapViewer.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 eu.hansolo.fx.heatmap;

import javafx.application.Application;
import javafx.geometry.Dimension2D;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.control.ToggleButton;
import javafx.scene.image.Image;
import javafx.scene.image.ImageView;
import javafx.scene.layout.AnchorPane;
import javafx.stage.FileChooser;
import javafx.stage.Stage;
import javafx.stage.Window;

import java.io.File;


/**
 * User: hansolo
 * Date: 30.06.14
 * Time: 14:59
 */
public class HeatMapViewer extends Application {
    private static final Dimension2D SIZE = new Dimension2D(1024, 640);
    private AnchorPane   pane;
    private ImageView    backgroundImage;
    private ImageView    heatMapImage;
    private Button       buttonLoadBackgroundImage;
    private Button       buttonLoadHeatMapImage;
    private ToggleButton toggleButtonShowHeatMap;


    @Override public void init() {
        backgroundImage           = new ImageView();
        heatMapImage              = new ImageView();
        buttonLoadBackgroundImage = new Button("BackgroundImage");
        buttonLoadHeatMapImage    = new Button("HeatmapImage");
        toggleButtonShowHeatMap   = new ToggleButton("hide");
        toggleButtonShowHeatMap.setSelected(true);

        AnchorPane.setLeftAnchor(buttonLoadBackgroundImage, 10d);
        AnchorPane.setTopAnchor(buttonLoadBackgroundImage, 10d);

        AnchorPane.setRightAnchor(buttonLoadHeatMapImage, 10d);
        AnchorPane.setTopAnchor(buttonLoadHeatMapImage, 10d);

        AnchorPane.setRightAnchor(toggleButtonShowHeatMap, 10d);
        AnchorPane.setTopAnchor(toggleButtonShowHeatMap, 40d);

        pane = new AnchorPane(backgroundImage, heatMapImage, buttonLoadBackgroundImage, buttonLoadHeatMapImage, toggleButtonShowHeatMap);

        registerListeners();
    }

    private void registerListeners() {
        buttonLoadBackgroundImage.setOnAction(observable -> handleControlPropertyChanged("LOAD_BACKGROUND"));
        buttonLoadHeatMapImage.setOnAction(observable -> handleControlPropertyChanged("LOAD_HEATMAP"));
        toggleButtonShowHeatMap.setOnAction(observable -> handleControlPropertyChanged("TOGGLE_HEATMAP"));
    }

    private void handleControlPropertyChanged(final String PROPERTY) {
        if ("LOAD_BACKGROUND".equals(PROPERTY)) {
            Image image = getImage(buttonLoadBackgroundImage.getScene().getWindow());
            if (null == image) return;
            backgroundImage.setImage(image);
            backgroundImage.toBack();
        } else if ("LOAD_HEATMAP".equals(PROPERTY)) {
            Image image = getImage(buttonLoadHeatMapImage.getScene().getWindow());
            if (null == image) return;
            heatMapImage.setImage(image);
            toggleButtonShowHeatMap.setSelected(true);
        } else if ("TOGGLE_HEATMAP".equals(PROPERTY)) {
            toggleButtonShowHeatMap.setText(toggleButtonShowHeatMap.isSelected() ? "show" : "hide");
            heatMapImage.setVisible(!toggleButtonShowHeatMap.isSelected());
        }
    }

    private Image getImage(final Window WINDOW) {
        FileChooser fileChooser = new FileChooser();
        fileChooser.setTitle("Open Resource File");
        fileChooser.getExtensionFilters().addAll(new FileChooser.ExtensionFilter("Image Files", "*.png", "*.jpg", "*.gif"));
        final File SELECTED_FILE = fileChooser.showOpenDialog(WINDOW);

        return null == SELECTED_FILE ? null : new Image("file:" + SELECTED_FILE.getAbsolutePath(), pane.getWidth(), 0, true, true);
    }

    @Override public void start(Stage stage) {
        Scene scene = new Scene(pane, SIZE.getWidth(), SIZE.getHeight());

        stage.setTitle("HeatMap Viewer");
        stage.setScene(scene);
        stage.show();
    }

    @Override public void stop() {
        System.exit(0);
    }

    public static void main(String[] args) {
        launch(args);
    }
}