gov.nist.spectrumbrowser.client.TextInputBox.java Source code

Introduction

Here is the source code for gov.nist.spectrumbrowser.client.TextInputBox.java

Source

/*
* Conditions Of Use 
* 
* This software was developed by employees of the National Institute of
* Standards and Technology (NIST), and others. 
* This software has been contributed to the public domain. 
* Pursuant to title 15 Untied States Code Section 105, works of NIST
* employees are not subject to copyright protection in the United States
* and are considered to be in the public domain. 
* As a result, a formal license is not needed to use this software.
* 
* This software is provided "AS IS."  
* NIST MAKES NO WARRANTY OF ANY KIND, EXPRESS, IMPLIED
* OR STATUTORY, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTY OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, NON-INFRINGEMENT
* AND DATA ACCURACY.  NIST does not warrant or make any representations
* regarding the use of the software or the results thereof, including but
* not limited to the correctness, accuracy, reliability or usefulness of
* this software.
*/
package gov.nist.spectrumbrowser.client;

import com.google.gwt.event.logical.shared.ValueChangeEvent;
import com.google.gwt.event.logical.shared.ValueChangeHandler;
import com.google.gwt.user.client.Window;
import com.google.gwt.user.client.ui.Composite;
import com.google.gwt.user.client.ui.HasHorizontalAlignment;
import com.google.gwt.user.client.ui.HasVerticalAlignment;
import com.google.gwt.user.client.ui.HorizontalPanel;
import com.google.gwt.user.client.ui.Label;
import com.google.gwt.user.client.ui.TextBox;
import com.google.gwt.user.client.ui.ValueBoxBase.TextAlignment;

public class TextInputBox extends Composite {
    HorizontalPanel horizontalPanel;
    Label label;
    TextBox textBox;

    public TextInputBox(String label, String initialText) {
        horizontalPanel = new HorizontalPanel();
        horizontalPanel.setHorizontalAlignment(HasHorizontalAlignment.ALIGN_CENTER);
        horizontalPanel.setVerticalAlignment(HasVerticalAlignment.ALIGN_MIDDLE);
        initWidget(horizontalPanel);
        this.label = new Label();
        textBox = new TextBox();
        textBox.setWidth("30px");
        this.label.setText(label);
        horizontalPanel.add(this.label);
        horizontalPanel.add(textBox);
        textBox.setText(initialText);
        textBox.setAlignment(TextAlignment.CENTER);
    }

    public boolean isInteger() {
        String str = getValue();
        if (str == null) {
            return false;
        }
        int length = str.length();
        if (length == 0) {
            return false;
        }
        int i = 0;
        if (str.charAt(0) == '-') {
            if (length == 1) {
                return false;
            }
            i = 1;
        }
        for (; i < length; i++) {
            char c = str.charAt(i);
            if (c <= '/' || c >= ':') {
                return false;
            }
        }
        return true;

    }

    public boolean isNonNegative() {
        return isInteger() && Integer.parseInt(getValue()) >= 0;
    }

    public String getText() {
        return textBox.getValue();
    }

    public void setValue(String value) {
        this.textBox.setValue(value);
    }

    public String getValue() {
        return this.textBox.getValue();
    }

    public void setEnabled(boolean b) {
        this.textBox.setEnabled(b);
    }

    public void addValueChangedHandler(final SensorInfoDisplay sid, final int maxDays) {
        this.textBox.setTitle("Restricted to " + maxDays + " days.");
        this.textBox.addValueChangeHandler(new ValueChangeHandler<String>() {

            @Override
            public void onValueChange(ValueChangeEvent<String> event) {
                String valueString = textBox.getValue();
                if (!isNonNegative()) {
                    Window.alert("Value must be positive and less than " + maxDays);
                    setValue(Integer.toString(maxDays));
                } else {
                    int count = Integer.parseInt(valueString);
                    if (count < 1 || count > maxDays) {
                        Window.alert("Value must be in the range [1:" + maxDays + "]");
                        if (count < 1)
                            setValue("1");
                        else
                            setValue(Integer.toString(maxDays));
                    } else {
                        setValue(Integer.toString(count));
                        sid.setDayCount(count);
                        sid.updateAcquistionCount();
                    }
                }

            }

        });
    }

}