ZoomLevel.java

/*
 * Copyright 2015 Laszlo Balazs-Csiki
 *
 * This file is part of Pixelitor. Pixelitor is free software: you
 * can redistribute it and/or modify it under the terms of the GNU
 * General Public License, version 3 as published by the Free
 * Software Foundation.
 *
 * Pixelitor 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 for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with Pixelitor. If not, see <http://www.gnu.org/licenses/>.
 */

package pixelitor.menus.view;

import java.awt.BasicStroke;
import java.awt.Stroke;
import java.util.Random;

/**
 * The available zoom levels
 */
public enum ZoomLevel {
    Z12("12.5 %") {
        @Override
        public double getPercentValue() {
            return 12.5;
        }

        @Override
        public ZoomLevel zoomIn() {
            return Z12plus;
        }

        @Override
        public ZoomLevel zoomOut() {
            return Z12;
        }
    }, Z12plus("17.7 %") { // 12.5 * sqrt(2)
        @Override
        public double getPercentValue() {
            return 17.677669529663688110021109052621;
        }

        @Override
        public ZoomLevel zoomIn() {
            return Z25;
        }

        @Override
        public ZoomLevel zoomOut() {
            return Z12;
        }
    }, Z25("25 %") {
        @Override
        public double getPercentValue() {
            return 25;
        }

        @Override
        public ZoomLevel zoomIn() {
            return Z25plus;
        }

        @Override
        public ZoomLevel zoomOut() {
            return Z12plus;
        }
    }, Z25plus("35.3 %") {
        @Override
        public double getPercentValue() {
            return 35.355339059327376220042218105242;
        }

        @Override
        public ZoomLevel zoomIn() {
            return Z50;
        }

        @Override
        public ZoomLevel zoomOut() {
            return Z25;
        }
    }, Z50("50 %") {
        @Override
        public double getPercentValue() {
            return 50;
        }

        @Override
        public ZoomLevel zoomIn() {
            return Z50plus;
        }

        @Override
        public ZoomLevel zoomOut() {
            return Z25plus;
        }
    }, Z50plus("70.7 %") {
        @Override
        public double getPercentValue() {
            return 70.710678118654752440084436210485;
        }

        @Override
        public ZoomLevel zoomIn() {
            return Z100;
        }

        @Override
        public ZoomLevel zoomOut() {
            return Z50;
        }
    }, Z100("100 %") {
        @Override
        public double getPercentValue() {
            return 100;
        }

        @Override
        public ZoomLevel zoomIn() {
            return Z100plus;
        }

        @Override
        public ZoomLevel zoomOut() {
            return Z50plus;
        }
    }, Z100plus("141.4 %") {
        @Override
        public double getPercentValue() {
            return 141.42135623730950488016887242097;
        }

        @Override
        public ZoomLevel zoomIn() {
            return Z200;
        }

        @Override
        public ZoomLevel zoomOut() {
            return Z100;
        }
    }, Z200("200 %") {
        @Override
        public double getPercentValue() {
            return 200;
        }

        @Override
        public ZoomLevel zoomIn() {
            return Z200plus;
        }

        @Override
        public ZoomLevel zoomOut() {
            return Z100plus;
        }
    }, Z200plus("282.8 %") {
        @Override
        public double getPercentValue() {
            return 282.84271247461900976033774484194;
        }

        @Override
        public ZoomLevel zoomIn() {
            return Z400;
        }

        @Override
        public ZoomLevel zoomOut() {
            return Z200;
        }
    }, Z400("400 %") {
        @Override
        public double getPercentValue() {
            return 400;
        }

        @Override
        public ZoomLevel zoomIn() {
            return Z400plus;
        }

        @Override
        public ZoomLevel zoomOut() {
            return Z200plus;
        }
    }, Z400plus("565.7 %") {
        @Override
        public double getPercentValue() {
            return 565.68542494923801952067548968388;
        }

        @Override
        public ZoomLevel zoomIn() {
            return Z800;
        }

        @Override
        public ZoomLevel zoomOut() {
            return Z400;
        }
    }, Z800("800 %") {
        @Override
        public double getPercentValue() {
            return 800;
        }

        @Override
        public ZoomLevel zoomIn() {
            return Z800plus;
        }

        @Override
        public ZoomLevel zoomOut() {
            return Z400plus;
        }
    }, Z800plus("1131.4 %") {
        @Override
        public double getPercentValue() {
            return 1131.3708498984760390413509793678;
        }

        @Override
        public ZoomLevel zoomIn() {
            return Z1600;
        }

        @Override
        public ZoomLevel zoomOut() {
            return Z800;
        }
    }, Z1600("1600 %") {
        @Override
        public double getPercentValue() {
            return 1600;
        }

        @Override
        public ZoomLevel zoomIn() {
            return Z1600plus;
        }

        @Override
        public ZoomLevel zoomOut() {
            return Z800plus;
        }
    }, Z1600plus("2262.7 %") {
        @Override
        public double getPercentValue() {
            return 2262.7416997969520780827019587355;
        }

        @Override
        public ZoomLevel zoomIn() {
            return Z3200;
        }

        @Override
        public ZoomLevel zoomOut() {
            return Z1600;
        }
    }, Z3200("3200 %") {
        @Override
        public double getPercentValue() {
            return 3200;
        }

        @Override
        public ZoomLevel zoomIn() {
            return Z3200plus;
        }

        @Override
        public ZoomLevel zoomOut() {
            return Z1600plus;
        }
    }, Z3200plus("4525.5 %") {
        @Override
        public double getPercentValue() {
            return 4525.483399593904156165403917471;
        }

        @Override
        public ZoomLevel zoomIn() {
            return Z6400;
        }

        @Override
        public ZoomLevel zoomOut() {
            return Z3200;
        }
    }, Z6400("6400 %") {
        @Override
        public double getPercentValue() {
            return 6400;
        }

        @Override
        public ZoomLevel zoomIn() {
            return Z6400;
        }

        @Override
        public ZoomLevel zoomOut() {
            return Z3200plus;
        }
    };

    private BasicStroke outerGeometryStroke;
    private BasicStroke innerGeometryStroke;
    private final String guiName;

    ZoomLevel(String guiName) {
        this.guiName = guiName;
    }

    private ZoomMenuItem menuItem;

    @Override
    public String toString() {
        return guiName;
    }

    public ZoomMenuItem getMenuItem() {
        // The menuItem must be initialized here in order to make sure that
        // it runs after the enum constructor, therefore it has a name
        if (menuItem == null) {
            menuItem = new ZoomMenuItem(this);
        }
        return menuItem;
    }

    public Stroke getOuterGeometryStroke() {
        if (outerGeometryStroke == null) {
            outerGeometryStroke = new BasicStroke((float) (300.0f / getPercentValue()));
        }
        return outerGeometryStroke;
    }

    public Stroke getInnerGeometryStroke() {
        if (innerGeometryStroke == null) {
            innerGeometryStroke = new BasicStroke((float) (100.0f / getPercentValue()));
        }
        return innerGeometryStroke;
    }

    public abstract double getPercentValue();

    public abstract ZoomLevel zoomIn();

    public abstract ZoomLevel zoomOut();

    public static ZoomLevel getRandomZoomLevel(Random rand) {
        int index = rand.nextInt(values().length);
        return values()[index];
    }

    public double getViewScale() {
        return getPercentValue() / 100.0;
    }

    public boolean drawPixelGrid() {
        return getPercentValue() > 1500;
    }
}