co.fxl.gui.gwt.GWTFlowPanel.java Source code

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Here is the source code for co.fxl.gui.gwt.GWTFlowPanel.java

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/**
 * Copyright (c) 2010-2015 Dangelmayr IT GmbH. All rights reserved.
 *  
 * This file is part of FXL GUI API.
 *  
 * FXL GUI API is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *  
 * FXL GUI API 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 FXL GUI API.  If not, see <http://www.gnu.org/licenses/>.
 */
package co.fxl.gui.gwt;

import co.fxl.gui.api.IAlignment;
import co.fxl.gui.api.IFlowPanel;

import com.google.gwt.dom.client.Document;
import com.google.gwt.dom.client.ParagraphElement;
import com.google.gwt.dom.client.Style;
import com.google.gwt.dom.client.Style.Unit;
import com.google.gwt.user.client.ui.AbsolutePanel;
import com.google.gwt.user.client.ui.FlowPanel;
import com.google.gwt.user.client.ui.Widget;

public class GWTFlowPanel extends GWTPanel<FlowPanel, IFlowPanel> implements IFlowPanel {

    private static final String RIGHT = "right";
    public static boolean SET_FLOAT_LEFT = false;
    private int margin = 0;
    private String floatValue = "left";

    public GWTFlowPanel() {
        super(newContainer());
    }

    private static GWTContainer<FlowPanel> newContainer() {
        GWTContainer<FlowPanel> c = new GWTContainer<FlowPanel>();
        c.setComponent(new FlowPanel());
        return c;
    }

    @SuppressWarnings("unchecked")
    GWTFlowPanel(GWTContainer<?> container) {
        super((GWTContainer<FlowPanel>) container);
        widget().setWidth("100%");
    }

    @Override
    GWTClickHandler<IFlowPanel> newGWTClickHandler(IClickListener clickListener) {
        return new GWTClickHandler<IFlowPanel>(this, clickListener);
    }

    @Override
    public void add(Widget widget) {
        widget.getElement().getStyle().setProperty("display", "inline");
        updateFloatValueWidget(widget);
        // widget.setHeight("100%");
        setMargin(widget);
        container.widget.add(widget);
    }

    @Override
    public IFlowPanel spacing(int spacing) {
        this.margin = spacing / 2;
        // TODO Look: GWT: Firefox: Margin doesn't work if items are
        // displayed in more than one row
        if (!GWTDisplay.isChrome)
            container.widget.getElement().getStyle().setPadding(spacing, Unit.PX);
        for (int i = 0; i < container.widget.getWidgetCount(); i++) {
            Widget w = container.widget.getWidget(i);
            setMargin(w);
        }
        return this;
    }

    @Override
    public IFlowPanel addSpace(int pixel) {
        Widget p = new AbsolutePanel();
        p.setSize(pixel + "px", "1px");
        container.widget.add(p);
        return this;
    }

    protected void setMargin(Widget w) {
        if (margin <= 0)
            return;
        w.getElement().getStyle().setMargin(margin, Unit.PX);
    }

    @Override
    public IAlignment<IFlowPanel> align() {
        return new IAlignment<IFlowPanel>() {

            @Override
            public IFlowPanel begin() {
                // TODO ... throw new UnsupportedOperationException();
                return GWTFlowPanel.this;
            }

            @Override
            public IFlowPanel center() {
                // TODO ... throw new UnsupportedOperationException();
                return GWTFlowPanel.this;
            }

            @Override
            public IFlowPanel end() {
                floatValue = RIGHT;
                updateFloatValueWidgets();
                // TODO ... throw new UnsupportedOperationException();
                return GWTFlowPanel.this;
            }

        };
    }

    private void updateFloatValueWidgets() {
        for (int i = 0; i < container.widget.getWidgetCount(); i++)
            updateFloatValueWidget(container.widget.getWidget(i));
    }

    private void updateFloatValueWidget(Widget widget) {
        if (SET_FLOAT_LEFT)
            widget.getElement().getStyle().setProperty("float", floatValue);
    }

    @Override
    public ILineBreak addLineBreak() {
        final ParagraphElement e = Document.get().createPElement();
        Style style = e.getStyle();
        style.setHeight(0, Unit.PX);
        style.setMargin(0, Unit.PX);
        container.widget.getElement().appendChild(e);
        return new ILineBreak() {
            @Override
            public void remove() {
                e.removeFromParent();
            }
        };
    }
}