package org.panel;
import com.electronapps.LJPro.R;
import android.content.Context;
import android.content.res.TypedArray;
import android.graphics.Canvas;
import android.graphics.drawable.Drawable;
import android.util.AttributeSet;
import android.view.GestureDetector;
import android.view.MotionEvent;
import android.view.View;
import android.view.ViewGroup;
import android.view.GestureDetector.OnGestureListener;
import android.view.animation.Animation;
import android.view.animation.Interpolator;
import android.view.animation.LinearInterpolator;
import android.view.animation.TranslateAnimation;
import android.view.animation.Animation.AnimationListener;
import android.widget.LinearLayout;
import android.widget.RelativeLayout;
public class Panel extends LinearLayout
{
private static final String TAG = "Panel";
/**
* Callback invoked when the panel is opened/closed.
*/
public static interface OnPanelListener
{
/**
* Invoked when the panel becomes fully closed.
*/
public void onPanelClosed(Panel panel);
/**
* Invoked when the panel becomes fully opened.
*/
public void onPanelOpened(Panel panel);
}
private boolean mIsShrinking;
private final int mPosition;
private final int mDuration;
private final boolean mLinearFlying;
private View mHandle;
private View mContent;
private final Drawable mOpenedHandle;
private final Drawable mClosedHandle;
private float mTrackX;
private float mTrackY;
private float mVelocity;
private OnPanelListener panelListener;
public static final int TOP = 0;
public static final int BOTTOM = 1;
public static final int LEFT = 2;
public static final int RIGHT = 3;
private enum State {
ABOUT_TO_ANIMATE, ANIMATING, READY, TRACKING, FLYING,
};
private State mState;
private Interpolator mInterpolator;
private final GestureDetector mGestureDetector;
private int mContentHeight;
private int mContentWidth;
private final int mOrientation;
View mContainer;
private final PanelOnGestureListener mGestureListener;
public Panel(Context context, AttributeSet attrs)
{
super(context, attrs);
TypedArray a = context.obtainStyledAttributes(attrs, R.styleable.Panel);
mDuration = a.getInteger(R.styleable.Panel_animationDuration, 750); // duration
// defaults
// to
// 750
// ms
mPosition = a.getInteger(R.styleable.Panel_position, BOTTOM); // position
// defaults
// to
// BOTTOM
mLinearFlying = a.getBoolean(R.styleable.Panel_linearFlying, false); // linearFlying
// defaults
// to
// false
mOpenedHandle = a.getDrawable(R.styleable.Panel_openedHandle);
mClosedHandle = a.getDrawable(R.styleable.Panel_closedHandle);
a.recycle();
mOrientation = (mPosition == TOP || mPosition == BOTTOM) ? VERTICAL : HORIZONTAL;
setOrientation(mOrientation);
mState = State.READY;
mGestureListener = new PanelOnGestureListener();
mGestureDetector = new GestureDetector(mGestureListener);
mGestureDetector.setIsLongpressEnabled(false);
}
/**
* Sets the listener that receives a notification when the panel becomes
* open/close.
*
* @param onPanelListener
* The listener to be notified when the panel is opened/closed.
*/
public void setOnPanelListener(OnPanelListener onPanelListener)
{
panelListener = onPanelListener;
}
/**
* Gets Panel's mHandle
*
* @return Panel's mHandle
*/
public View getHandle()
{
return mHandle;
}
/**
* Gets Panel's mContent
*
* @return Panel's mContent
*/
public View getContent()
{
return mContent;
}
/**
* Sets the acceleration curve for panel's animation.
*
* @param i
* The interpolator which defines the acceleration curve
*/
public void setInterpolator(Interpolator i)
{
mInterpolator = i;
}
/**
* Set the opened state of Panel.
*
* @param open
* True if Panel is to be opened, false if Panel is to be closed.
* @param animate
* True if use animation, false otherwise.
*
*/
public void setOpen(boolean open, boolean animate)
{
if (isOpen() ^ open)
{
mIsShrinking = !open;
if (animate)
{
mState = State.ABOUT_TO_ANIMATE;
if (!mIsShrinking)
{
// this could make flicker so we test mState in
// dispatchDraw()
// to see if is equal to ABOUT_TO_ANIMATE
mContent.setVisibility(VISIBLE);
}
post(startAnimation);
}
else
{
mContent.setVisibility(open ? VISIBLE : GONE);
postProcess();
}
}
}
/**
* Returns the opened status for Panel.
*
* @return True if Panel is opened, false otherwise.
*/
public boolean isOpen()
{
return mContent.getVisibility() == VISIBLE;
}
@Override
protected void onFinishInflate()
{
super.onFinishInflate();
mHandle = findViewById(R.id.panelHandle);
if (mHandle == null) { throw new RuntimeException("Your Panel must have a View whose id attribute is 'R.id.panelHandle'"); }
mHandle.setOnTouchListener(touchListener);
mContent = findViewById(R.id.panelContent);
if (mContent == null) { throw new RuntimeException("Your Panel must have a View whose id attribute is 'R.id.panelContent'"); }
// reposition children
removeView(mHandle);
removeView(mContent);
if (mPosition == TOP || mPosition == LEFT)
{
addView(mContent);
addView(mHandle);
}
else
{
addView(mHandle);
addView(mContent);
}
if (mClosedHandle != null)
{
mHandle.setBackgroundDrawable(mClosedHandle);
}
mContent.setVisibility(GONE);
}
@Override
protected void onLayout(boolean changed, int l, int t, int r, int b)
{
super.onLayout(changed, l, t, r, b);
mContentWidth = mContent.getWidth();
mContentHeight = mContent.getHeight();
}
@Override
protected void dispatchDraw(Canvas canvas)
{
// String name = getResources().getResourceEntryName(getId());
// Log.d(TAG, name + " ispatchDraw " + mState);
// this is why 'mState' was added:
// avoid flicker before animation start
if (mState == State.ABOUT_TO_ANIMATE && !mIsShrinking)
{
int delta = mOrientation == VERTICAL ? mContentHeight : mContentWidth;
if (mPosition == LEFT || mPosition == TOP)
{
delta = -delta;
}
if (mOrientation == VERTICAL)
{
canvas.translate(0, delta);
}
else
{
canvas.translate(delta, 0);
}
}
if (mState == State.TRACKING || mState == State.FLYING)
{
canvas.translate(mTrackX, mTrackY);
}
super.dispatchDraw(canvas);
}
private float ensureRange(float v, int min, int max)
{
v = Math.max(v, min);
v = Math.min(v, max);
return v;
}
private int[] mPanels;
public void registerSiblings(int[] ids) {
mPanels=ids;
}
public void setParent(View parent){
mContainer=parent;
}
android.widget.RelativeLayout.LayoutParams mOpenParams=new RelativeLayout.LayoutParams(LayoutParams.FILL_PARENT, LayoutParams.WRAP_CONTENT);
android.widget.RelativeLayout.LayoutParams mClosedParams;
OnTouchListener touchListener = new OnTouchListener()
{
int initX;
int initY;
boolean setInitialPosition;
public boolean onTouch(View v, MotionEvent event)
{
// Log.d(TAG, "state: " + mState + " x: " + event.getX() + " y: " +
// event.getY());
int action = event.getAction();
bringToFront();
if (action == MotionEvent.ACTION_DOWN)
{
initX = 0;
initY = 0;
if (mContent.getVisibility() == GONE)
if (mClosedParams==null) mClosedParams=(RelativeLayout.LayoutParams) getLayoutParams();
{
setLayoutParams(mOpenParams);
/*final View parent=mContainer;
final int[] siblings=mPanels;
for(int i=0;i<siblings.length;i++){
View p=parent.findViewById(siblings[i]);
p.setVisibility(GONE);
}*/
invalidate();
// since we may not know content dimensions we use factors
// here
if (mOrientation == VERTICAL)
{
initY = mPosition == TOP ? -1 : 1;
}
else
{
initX = mPosition == LEFT ? -1 : 1;
}
}
setInitialPosition = true;
}
else
{
if (setInitialPosition)
{
// now we know content dimensions, so we multiply factors...
initX *= mContentWidth;
initY *= mContentHeight;
// ... and set initial panel's position
mGestureListener.setScroll(initX, initY);
setInitialPosition = false;
// for offsetLocation we have to invert values
initX = -initX;
initY = -initY;
}
// offset every ACTION_MOVE & ACTION_UP event
event.offsetLocation(initX, initY);
}
if (!mGestureDetector.onTouchEvent(event))
{
if (action == MotionEvent.ACTION_UP)
{
// tup up after scrolling
post(startAnimation);
}
}
return false;
}
};
Runnable startAnimation = new Runnable()
{
public void run()
{
// this is why we post this Runnable couple of lines above:
// now its save to use mContent.getHeight() && mContent.getWidth()
TranslateAnimation animation;
int fromXDelta = 0, toXDelta = 0, fromYDelta = 0, toYDelta = 0;
if (mState == State.FLYING)
{
mIsShrinking = (mPosition == TOP || mPosition == LEFT) ^ (mVelocity > 0);
}
int calculatedDuration;
if (mOrientation == VERTICAL)
{
int height = mContentHeight;
if (!mIsShrinking)
{
fromYDelta = mPosition == TOP ? -height : height;
}
else
{
toYDelta = mPosition == TOP ? -height : height;
}
if (mState == State.TRACKING)
{
if (Math.abs(mTrackY - fromYDelta) < Math.abs(mTrackY - toYDelta))
{
mIsShrinking = !mIsShrinking;
toYDelta = fromYDelta;
}
fromYDelta = (int) mTrackY;
}
else if (mState == State.FLYING)
{
fromYDelta = (int) mTrackY;
}
// for FLYING events we calculate animation duration based on
// flying velocity
// also for very high velocity make sure duration >= 20 ms
if (mState == State.FLYING && mLinearFlying)
{
calculatedDuration = (int) (1000 * Math.abs((toYDelta - fromYDelta) / mVelocity));
calculatedDuration = Math.max(calculatedDuration, 20);
}
else
{
calculatedDuration = mDuration * Math.abs(toYDelta - fromYDelta) / mContentHeight;
}
}
else
{
int width = mContentWidth;
if (!mIsShrinking)
{
fromXDelta = mPosition == LEFT ? -width : width;
}
else
{
toXDelta = mPosition == LEFT ? -width : width;
}
if (mState == State.TRACKING)
{
if (Math.abs(mTrackX - fromXDelta) < Math.abs(mTrackX - toXDelta))
{
mIsShrinking = !mIsShrinking;
toXDelta = fromXDelta;
}
fromXDelta = (int) mTrackX;
}
else if (mState == State.FLYING)
{
fromXDelta = (int) mTrackX;
}
// for FLYING events we calculate animation duration based on
// flying velocity
// also for very high velocity make sure duration >= 20 ms
if (mState == State.FLYING && mLinearFlying)
{
calculatedDuration = (int) (1000 * Math.abs((toXDelta - fromXDelta) / mVelocity));
calculatedDuration = Math.max(calculatedDuration, 20);
}
else
{
calculatedDuration = mDuration * Math.abs(toXDelta - fromXDelta) / mContentWidth;
}
}
mTrackX = mTrackY = 0;
if (calculatedDuration == 0)
{
mState = State.READY;
if (mIsShrinking)
{
mContent.setVisibility(GONE);
setLayoutParams(mClosedParams);
/*for(int i=0;i<mPanels.length;i++){
mContainer.findViewById(mPanels[i]).setVisibility(VISIBLE);
}*/
invalidate();
}
postProcess();
return;
}
animation = new TranslateAnimation(fromXDelta, toXDelta, fromYDelta, toYDelta);
animation.setDuration(calculatedDuration);
animation.setAnimationListener(animationListener);
if (mState == State.FLYING && mLinearFlying)
{
animation.setInterpolator(new LinearInterpolator());
}
else if (mInterpolator != null)
{
animation.setInterpolator(mInterpolator);
}
startAnimation(animation);
}
};
private final AnimationListener animationListener = new AnimationListener()
{
public void onAnimationEnd(Animation animation)
{
mState = State.READY;
if (mIsShrinking)
{
mContent.setVisibility(GONE);
setLayoutParams(mClosedParams);
/*for(int i=0;i<mPanels.length;i++){
mContainer.findViewById(mPanels[i]).setVisibility(VISIBLE);
}*/
invalidate();
}
postProcess();
}
public void onAnimationRepeat(Animation animation)
{
}
public void onAnimationStart(Animation animation)
{
mState = State.ANIMATING;
}
};
private void postProcess()
{
if (mIsShrinking && mClosedHandle != null)
{
mHandle.setBackgroundDrawable(mClosedHandle);
}
else if (!mIsShrinking && mOpenedHandle != null)
{
mHandle.setBackgroundDrawable(mOpenedHandle);
}
// invoke listener if any
if (panelListener != null)
{
if (mIsShrinking)
{
panelListener.onPanelClosed(Panel.this);
}
else
{
panelListener.onPanelOpened(Panel.this);
}
}
}
class PanelOnGestureListener implements OnGestureListener
{
float scrollY;
float scrollX;
public void setScroll(int initScrollX, int initScrollY)
{
scrollX = initScrollX;
scrollY = initScrollY;
}
public boolean onDown(MotionEvent e)
{
scrollX = scrollY = 0;
if (mState != State.READY)
{
// we are animating or just about to animate
return false;
}
mState = State.ABOUT_TO_ANIMATE;
mIsShrinking = mContent.getVisibility() == VISIBLE;
if (!mIsShrinking)
{
// this could make flicker so we test mState in dispatchDraw()
// to see if is equal to ABOUT_TO_ANIMATE
mContent.setVisibility(VISIBLE);
}
return true;
}
public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX, float velocityY)
{
mState = State.FLYING;
mVelocity = mOrientation == VERTICAL ? velocityY : velocityX;
post(startAnimation);
return true;
}
public void onLongPress(MotionEvent e)
{
// not used
}
public boolean onScroll(MotionEvent e1, MotionEvent e2, float distanceX, float distanceY)
{
mState = State.TRACKING;
float tmpY = 0, tmpX = 0;
if (mOrientation == VERTICAL)
{
scrollY -= distanceY;
if (mPosition == TOP)
{
tmpY = ensureRange(scrollY, -mContentHeight, 0);
}
else
{
tmpY = ensureRange(scrollY, 0, mContentHeight);
}
}
else
{
scrollX -= distanceX;
if (mPosition == LEFT)
{
tmpX = ensureRange(scrollX, -mContentWidth, 0);
}
else
{
tmpX = ensureRange(scrollX, 0, mContentWidth);
}
}
if (tmpX != mTrackX || tmpY != mTrackY)
{
mTrackX = tmpX;
mTrackY = tmpY;
invalidate();
}
return true;
}
public void onShowPress(MotionEvent e)
{
// not used
}
public boolean onSingleTapUp(MotionEvent e)
{
// simple tap: click
post(startAnimation);
return true;
}
}
}