Android Open Source - vitdroid-android Slider Container

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License

The source code is released under:

Apache License

Java Source Code

package com.googlecode.android.widgets.DateSlider;
//from w ww.j a  va  2  s . c  o  m
import java.util.Calendar;



import android.content.Context;
import android.util.AttributeSet;
import android.view.View;
import android.widget.LinearLayout;

/**
 * This is a container class for ScrollLayouts. It coordinates the scrolling
 * between them, so that if one is scrolled, the others are scrolled to
 * keep a consistent display of the time. It also notifies an optional
 * observer anytime the time is changed.
 */
public class SliderContainer extends LinearLayout {
    private Calendar mTime = null;
    private OnTimeChangeListener mOnTimeChangeListener;
    private int minuteInterval;

    public SliderContainer(Context context, AttributeSet attrs) {
        super(context, attrs);
        setOrientation(VERTICAL);
    }

    @Override
    protected void onFinishInflate() {
        final int childCount = getChildCount();
        for (int i = 0; i < childCount; i++) {
            View v = getChildAt(i);
            if (v instanceof ScrollLayout) {
                final ScrollLayout sl = (ScrollLayout)v;
                sl.setOnScrollListener(
                        new ScrollLayout.OnScrollListener() {
                            public void onScroll(long x) {
                                mTime.setTimeInMillis(x);
                                arrangeScrollers(sl);
                            }
                        });
            }
        }
    }

    /**
     * Set the current time and update all of the child ScrollLayouts accordingly.
     *
     * @param calendar
     */
    public void setTime(Calendar calendar) {
      mTime = Calendar.getInstance(calendar.getTimeZone());
        mTime.setTimeInMillis(calendar.getTimeInMillis());
        arrangeScrollers(null);
    }
    
    /**
     * Get the current time
     *
     * @return The current time
     */
    public Calendar getTime() {
        return mTime;
    }
    
    
    /**
     * sets the minimum date that the scroller can scroll
     * 
     * @param c the minimum date (inclusiv)
     */
    public void setMinTime(Calendar c) {
      if (mTime==null) {
        throw new RuntimeException("You have to call setTime before setting a MinimumTime!");
      }
        final int childCount = getChildCount();
        for (int i = 0; i < childCount; i++) {
            View v = getChildAt(i);
            if (v instanceof ScrollLayout) {
                ScrollLayout scroller = (ScrollLayout)v;
                scroller.setMinTime(c.getTimeInMillis());
            }
        }
    }
    
    /**
     * sets the maximum date that the scroller can scroll
     * 
     * @param c the maximum date (inclusive)
     */
    public void setMaxTime(Calendar c) {
      if (mTime==null) {
        throw new RuntimeException("You have to call setTime before setting a MinimumTime!");
      }
        final int childCount = getChildCount();
        for (int i = 0; i < childCount; i++) {
            View v = getChildAt(i);
            if (v instanceof ScrollLayout) {
                ScrollLayout scroller = (ScrollLayout)v;
                scroller.setMaxTime(c.getTimeInMillis());
            }
        }
    }
    
    /**
     * sets the minute interval of the scroll layouts.
     * @param minInterval
     */
    public void setMinuteInterval(int minInterval) {
      this.minuteInterval = minInterval;
        final int childCount = getChildCount();
        for (int i = 0; i < childCount; i++) {
            View v = getChildAt(i);
            if (v instanceof ScrollLayout) {
                ScrollLayout scroller = (ScrollLayout)v;
                scroller.setMinuteInterval(minInterval);
            }
        }
    }

    /**
     * Sets the OnTimeChangeListener, which will be notified anytime the time is
     * set or changed.
     *
     * @param l
     */
    public void setOnTimeChangeListener(OnTimeChangeListener l) {
        mOnTimeChangeListener = l;
    }

    /**
     * Pushes our current time into all child ScrollLayouts, except the source
     * of the time change (if specified)
     *
     * @param source The ScrollLayout that generated the time change, or null if
     *               this isn't the result of a ScrollLayout-generated time change.
     */
    private void arrangeScrollers(ScrollLayout source) {
        final int childCount = getChildCount();
        for (int i = 0; i < childCount; i++) {
            View v = getChildAt(i);
            if (v == source) {
                continue;
            }
            if (v instanceof ScrollLayout) {
                ScrollLayout scroller = (ScrollLayout)v;
                scroller.setTime(mTime.getTimeInMillis());
            }
        }

        if (mOnTimeChangeListener != null) {
          if (minuteInterval>1) {
            int minute = mTime.get(Calendar.MINUTE)/minuteInterval*minuteInterval;
            
            mTime.set(Calendar.MINUTE, minute);
          }
            mOnTimeChangeListener.onTimeChange(mTime);
        }
    }

    public static interface OnTimeChangeListener {
        public void onTimeChange(Calendar time);
    }
}

Java Source Code List

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