com.risevision.ui.client.display.DistributionWidget.java Source code

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Here is the source code for com.risevision.ui.client.display.DistributionWidget.java

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// Copyright  2010 - May 2014 Rise Vision Incorporated.
// Use of this software is governed by the GPLv3 license
// (reproduced in the LICENSE file).

package com.risevision.ui.client.display;

import java.util.ArrayList;

import com.google.gwt.event.dom.client.ClickEvent;
import com.google.gwt.event.dom.client.ClickHandler;
import com.google.gwt.event.logical.shared.ValueChangeEvent;
import com.google.gwt.event.logical.shared.ValueChangeHandler;
import com.google.gwt.user.client.Command;
import com.google.gwt.user.client.ui.Anchor;
import com.google.gwt.user.client.ui.CheckBox;
import com.google.gwt.user.client.ui.HTML;
import com.google.gwt.user.client.ui.HorizontalPanel;
import com.google.gwt.user.client.ui.Label;

public class DistributionWidget extends HorizontalPanel {

    private CheckBox cbAllDisplays = new CheckBox("All Displays");

    private Anchor hlDistribution = new Anchor("Edit");
    private Label lbDescription = new Label();
    private ArrayList<String> distribution;

    private boolean allowEmptyDistribution;

    public DistributionWidget() {
        this(true);
    }

    public DistributionWidget(boolean allowEmptyDistribution) {
        this.allowEmptyDistribution = allowEmptyDistribution;

        styleControls();

        add(cbAllDisplays);
        add(new HTML("&nbsp;&nbsp;&nbsp;&nbsp;"));
        add(hlDistribution);
        add(new HTML("&nbsp;&nbsp;"));
        add(lbDescription);

        final Command onSaveCallBack = new Command() {
            public void execute() {
                setDistributionToAll(false);
                setDistribution(DistributionSelectWidget.getInstance().getDistribution());
            }
        };

        hlDistribution.addClickHandler(new ClickHandler() {
            public void onClick(ClickEvent event) {
                DistributionSelectWidget.getInstance().show(getDistribution(), onSaveCallBack);
            }
        });

        cbAllDisplays.addValueChangeHandler(new ValueChangeHandler<Boolean>() {
            public void onValueChange(ValueChangeEvent<Boolean> event) {
                updateDescription();
            }
        });
    }

    private void styleControls() {
        this.setVerticalAlignment(ALIGN_MIDDLE);
        cbAllDisplays.setStyleName("rdn-CheckBox");
        cbAllDisplays.getElement().getStyle().setProperty("whiteSpace", "nowrap");
    }

    public void setDistribution(ArrayList<String> distribution) {
        this.distribution = distribution;

        if (!allowEmptyDistribution) {
            setDistributionToAll(distribution == null || distribution.isEmpty());
        } else {
            updateDescription();
        }
    }

    public ArrayList<String> getDistribution() {
        if (!allowEmptyDistribution && cbAllDisplays.getValue()) {
            return new ArrayList<String>();
        } else {
            return distribution;
        }
    }

    public void setDistributionToAll(boolean distributionToAll) {
        cbAllDisplays.setValue(distributionToAll);
        updateDescription();
    }

    public boolean getDistributionToAll() {
        return cbAllDisplays.getValue();
    }

    private void updateDescription() {
        String numberOfSelectedDisplays = "0";
        if (distribution != null)
            numberOfSelectedDisplays = Integer.toString(distribution.size());

        lbDescription.setText("(" + numberOfSelectedDisplays + " Displays Selected)");
        lbDescription.setVisible(!cbAllDisplays.getValue());
    }

}