com.risevision.ui.client.presentation.common.LockRatioWidget.java Source code

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Here is the source code for com.risevision.ui.client.presentation.common.LockRatioWidget.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.presentation.common;

import com.google.gwt.event.dom.client.ChangeEvent;
import com.google.gwt.event.dom.client.ChangeHandler;
import com.google.gwt.event.logical.shared.ValueChangeEvent;
import com.google.gwt.event.logical.shared.ValueChangeHandler;
//import com.google.gwt.event.shared.HandlerRegistration;
import com.google.gwt.user.client.ui.CheckBox;
import com.google.gwt.user.client.ui.TextBox;
import com.risevision.common.client.utils.RiseUtils;

public class LockRatioWidget extends CheckBox {
    private TextBox heightTextBox, widthTextBox;
    private double heightValue, widthValue;
    private ChangeHandler heightChangeHandler, widthChangeHandler;
    //   private HandlerRegistration heightHandler, widthHandler;

    public LockRatioWidget(String label) {
        super(label);
    }

    public void initWidget(TextBox heightTextBox, TextBox widthTextBox) {
        this.heightTextBox = heightTextBox;
        this.widthTextBox = widthTextBox;

        initHandlers();
    }

    private void initHandlers() {
        addValueChangeHandler(new ValueChangeHandler<Boolean>() {

            @Override
            public void onValueChange(ValueChangeEvent<Boolean> event) {
                if (event.getValue() && isVisible()) {
                    initValues();
                }
                //            else{
                //               removeChangeHandlers();
                //            }
            }
        });

        widthChangeHandler = new ChangeHandler() {

            @Override
            public void onChange(ChangeEvent event) {
                if (getValue() && isVisible())
                    widthChanged();
            }
        };

        heightChangeHandler = new ChangeHandler() {

            @Override
            public void onChange(ChangeEvent event) {
                if (getValue() && isVisible())
                    heightChanged();
            }
        };

        heightTextBox.addChangeHandler(heightChangeHandler);
        widthTextBox.addChangeHandler(widthChangeHandler);

        initValues();
    }

    private void initValues() {
        if (heightTextBox != null && widthTextBox != null) {
            //         heightHandler = heightTextBox.addChangeHandler(heightChangeHandler);
            //         widthHandler = widthTextBox.addChangeHandler(widthChangeHandler);

            widthValue = RiseUtils.strToInt(widthTextBox.getValue(), 0);
            heightValue = RiseUtils.strToInt(heightTextBox.getValue(), 0);
        }
    }

    //   private void removeChangeHandlers(){
    //      try{
    //         heightHandler.removeHandler();
    //         widthHandler.removeHandler();
    //      }
    //      catch(Exception e){
    //         
    //      }
    //   }

    private void widthChanged() {
        if (widthValue != 0 && heightValue != 0) {
            int width = RiseUtils.strToInt(widthTextBox.getValue(), 0);
            if (width != 0) {
                heightValue = (int) ((heightValue / widthValue) * width);
                widthValue = width;
                heightTextBox.setValue((int) heightValue + "");
            }
        } else
            widthValue = RiseUtils.strToInt(widthTextBox.getValue(), 0);
    }

    private void heightChanged() {
        if (widthValue != 0 && heightValue != 0) {
            int height = RiseUtils.strToInt(heightTextBox.getValue(), 0);
            if (height != 0) {
                widthValue = (int) ((widthValue / heightValue) * height);
                heightValue = height;
                widthTextBox.setValue((int) widthValue + "");
            }
        } else
            heightValue = RiseUtils.strToInt(heightTextBox.getValue(), 0);
    }

    public void setVisible(boolean visibility) {
        super.setVisible(visibility);

        if (visibility && getValue()) {
            initValues();
        }
        //      else{
        //         removeChangeHandlers();
        //      }
    }

}