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A Domain Specific Language for Android touch events: Part 1: Description and usage of the DSL

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6 Dec 2013CPOL9 min read 46.9K   467   31  
A DSL for creating touch gestures in Android.
package com.hfk.android.gestures;

import android.view.View;

public class IfThenClause {

	public IfThenClause(IGestureCondition condition)
	{
		this.condition = condition;
		this.onTrueAction = null;
		this.onFalseAction = new DoInvalidateGestureGestureAction();
	}

	public void setThenAction(IGestureAction action)
	{
		this.onTrueAction = action;
	}
	
	public void setElseAction(IGestureAction action)
	{
		this.onFalseAction = action;
	}
	
	public boolean Execute(GestureEvent motion, TouchGesture gesture)
	{
		if(condition.checkCondition(motion, gesture))
		{
			if(onTrueAction != null)
			{
				onTrueAction.executeAction(motion, gesture);
			}
			return true;
		}
		else
		{
			if(onFalseAction != null)
			{
				onFalseAction.executeAction(motion, gesture);
			}
			return false;
		}
	}
	
	View view;

	private IGestureCondition condition;
	private IGestureAction onTrueAction;
	private IGestureAction onFalseAction;
}

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This article, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)


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