HorizontalSlider.java

/* 
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.openideals.android.ui;

import android.content.Context;
import android.util.AttributeSet;
import android.view.MotionEvent;
import android.view.View;
import android.widget.ProgressBar;

/*
 * Touch and drag horizontal slide user interface
 */
public class HorizontalSlider extends ProgressBar {

	private OnProgressChangeListener listener;

	private static int padding = 2;

	public interface OnProgressChangeListener {
		void onProgressChanged(View v, int progress);
	}
	
	public HorizontalSlider(Context context, AttributeSet attrs,
			int defStyle) {
		super(context, attrs,  defStyle);
	}

	public HorizontalSlider(Context context, AttributeSet attrs) {
		super(context, attrs, android.R.attr.progressBarStyleHorizontal);

	
	}

	public HorizontalSlider(Context context) {
		super(context);

	}

	public void setOnProgressChangeListener(OnProgressChangeListener l) {
		listener = l;
	}

	@Override
	public boolean onTouchEvent(MotionEvent event) {

		int action = event.getAction();

		if (action == MotionEvent.ACTION_DOWN
				|| action == MotionEvent.ACTION_MOVE) {
			float x_mouse = event.getX() - padding;
			float width = getWidth() - 2*padding;
			int progress = Math.round((float) getMax() * (x_mouse / width));

			if (progress < 0)
				progress = 0;

			this.setProgress(progress);

			if (listener != null)
				listener.onProgressChanged(this, progress);

		}

		return true;
	}
	
	public int getSliderValue ()
	{
		return getProgress();
	}
}