org.caleydo.vis.lineup.internal.ui.ButtonBar.java Source code

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Here is the source code for org.caleydo.vis.lineup.internal.ui.ButtonBar.java

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/*******************************************************************************
 * Caleydo - Visualization for Molecular Biology - http://caleydo.org
 * Copyright (c) The Caleydo Team. All rights reserved.
 * Licensed under the new BSD license, available at http://caleydo.org/license
 ******************************************************************************/
package org.caleydo.vis.lineup.internal.ui;

import java.net.URL;
import java.util.ArrayList;
import java.util.List;
import java.util.Objects;

import org.caleydo.core.event.ADirectedEvent;
import org.caleydo.core.event.EventListenerManager.ListenTo;
import org.caleydo.core.view.contextmenu.AContextMenuItem;
import org.caleydo.core.view.contextmenu.GenericContextMenuItem;
import org.caleydo.core.view.contextmenu.item.SeparatorMenuItem;
import org.caleydo.core.view.opengl.layout2.GLElement;
import org.caleydo.core.view.opengl.layout2.GLElementContainer;
import org.caleydo.core.view.opengl.layout2.GLGraphics;
import org.caleydo.core.view.opengl.layout2.basic.GLButton;
import org.caleydo.core.view.opengl.layout2.layout.GLLayouts;
import org.caleydo.core.view.opengl.layout2.renderer.IGLRenderer;
import org.caleydo.data.loader.ResourceLocators.IResourceLocator;
import org.caleydo.vis.lineup.internal.event.TriggerButtonEvent;
import org.caleydo.vis.lineup.ui.RenderStyle;

import com.google.common.collect.Iterables;

/**
 * simple bar of buttons in a horizontal row
 *
 * @author Samuel Gratzl
 *
 */
public class ButtonBar extends GLElementContainer {
    public ButtonBar() {
        super(GLLayouts.flowHorizontal(1));
        setSize(Float.NaN, RenderStyle.BUTTON_WIDTH);
    }

    public GLButton addButton(GLButton b, String label, URL deselectedImage, URL selectedImage) {
        return addButton(size(), b, label, deselectedImage, selectedImage);
    }

    public GLButton addButton(int index, GLButton b, String label, URL deselectedImage, URL selectedImage) {
        b.setTooltip(label);
        b.setRenderer(new ImageRenderer(deselectedImage));
        b.setSelectedRenderer(new ImageRenderer(selectedImage));
        this.add(index, b.setSize(RenderStyle.BUTTON_WIDTH, -1));
        return b;
    }

    public GLButton addButton(GLButton b) {
        this.add(b.setSize(RenderStyle.BUTTON_WIDTH, -1));
        return b;
    }

    public void addSpacer() {
        this.add(new GLElement());
    }

    public float getMinWidth() {
        int buttons = Iterables.size(Iterables.filter(this, GLButton.class));
        return buttons * (RenderStyle.BUTTON_WIDTH + 1);
    }

    /**
     * tries to convert the contained buttons to context menu items, that trigger {@link TriggerButtonEvent} events
     *
     * @param receiver
     *            event receiver
     * @param locator
     *            loader to load the image for a button
     * @return
     */
    public List<AContextMenuItem> asContextMenu(IResourceLocator locator) {
        List<AContextMenuItem> items = new ArrayList<>(size());
        for (GLElement elem : this) {
            if (elem instanceof GLButton) {
                items.add(asItem((GLButton) elem, locator));
            } else {
                items.add(SeparatorMenuItem.INSTANCE);
            }
        }
        return items;
    }

    private AContextMenuItem asItem(GLButton elem, IResourceLocator locator) {
        String label = Objects.toString(elem.getTooltip(), elem.toString());
        ADirectedEvent event = new TriggerButtonEvent(elem).to(this);
        AContextMenuItem item = new GenericContextMenuItem(label, event);
        // if (elem.getMode() == EButtonMode.CHECKBOX) {
        // item.setType(EContextMenuType.CHECK);
        // item.setState(elem.isSelected());
        // }
        URL imagePath = toImagePath(elem.isSelected() ? elem.getSelectedRenderer() : elem.getRenderer());
        item.setImageURL(imagePath);
        return item;
    }

    @ListenTo(sendToMe = true)
    private void onTriggerButton(TriggerButtonEvent event) {
        GLButton b = event.getButton();
        b.setSelected(!b.isSelected());
    }

    private URL toImagePath(IGLRenderer renderer) {
        if (renderer instanceof ImageRenderer) {
            return ((ImageRenderer) renderer).image;
        }
        return null;
    }

    private static class ImageRenderer implements IGLRenderer {
        private final URL image;

        public ImageRenderer(URL image) {
            this.image = image;
        }

        @Override
        public void render(GLGraphics g, float w, float h, GLElement parent) {
            g.fillImage(image, 0, 0, w, h);
        }
    }
}