org.rstudio.core.client.widget.FixedRatioWidget.java Source code

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Here is the source code for org.rstudio.core.client.widget.FixedRatioWidget.java

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/*
 * FixedRatioWidget.java
 *
 * Copyright (C) 2009-16 by RStudio, Inc.
 *
 * Unless you have received this program directly from RStudio pursuant
 * to the terms of a commercial license agreement with RStudio, then
 * this program is licensed to you under the terms of version 3 of the
 * GNU Affero General Public License. This program is distributed WITHOUT
 * ANY EXPRESS OR IMPLIED WARRANTY, INCLUDING THOSE OF NON-INFRINGEMENT,
 * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. Please refer to the
 * AGPL (http://www.gnu.org/licenses/agpl-3.0.txt) for more details.
 *
 */
package org.rstudio.core.client.widget;

import com.google.gwt.dom.client.Style;
import com.google.gwt.dom.client.Style.Position;
import com.google.gwt.dom.client.Style.Unit;
import com.google.gwt.user.client.ui.Composite;
import com.google.gwt.user.client.ui.HTMLPanel;
import com.google.gwt.user.client.ui.Widget;

public class FixedRatioWidget extends Composite {
    public FixedRatioWidget(Widget widget, double aspect, int maxWidth) {
        widget_ = widget;

        HTMLPanel outer = new HTMLPanel("");
        Style outerStyle = outer.getElement().getStyle();
        outerStyle.setWidth(100, Unit.PCT);
        outerStyle.setProperty("maxWidth", maxWidth + "px");

        HTMLPanel panel = new HTMLPanel("");
        Style panelStyle = panel.getElement().getStyle();
        panelStyle.setPosition(Position.RELATIVE);
        panelStyle.setWidth(100, Unit.PCT);
        panelStyle.setHeight(0, Unit.PX);
        panelStyle.setPaddingBottom((double) 100 * ((double) 1 / aspect), Unit.PCT);
        outer.add(panel);

        Style widgetStyle = widget.getElement().getStyle();
        widgetStyle.setPosition(Position.ABSOLUTE);
        widgetStyle.setWidth(100, Unit.PCT);
        widgetStyle.setHeight(100, Unit.PCT);
        widgetStyle.setLeft(0, Unit.PX);
        widgetStyle.setTop(0, Unit.PX);

        panel.add(widget_);
        initWidget(outer);
    }

    public Widget getWidget() {
        return widget_;
    }

    private final Widget widget_;
}