package org.miscwidgets.widget;
import org.miscwidgets.R;
import android.content.Context;
import android.content.res.TypedArray;
import android.graphics.Canvas;
import android.graphics.drawable.Drawable;
import android.text.method.KeyListener;
import android.util.AttributeSet;
import android.util.Log;
import android.view.GestureDetector;
import android.view.KeyEvent;
import android.view.MotionEvent;
import android.view.View;
import android.view.ViewGroup;
import android.view.ViewParent;
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.FrameLayout;
import android.widget.LinearLayout;
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 int mPosition;
private int mDuration;
private boolean mLinearFlying;
private int mHandleId;
private int mContentId;
private View mHandle;
private View mContent;
private Drawable mOpenedHandle;
private 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 GestureDetector mGestureDetector;
private int mContentHeight;
private int mContentWidth;
private int mOrientation;
private float mWeight;
private PanelOnGestureListener mGestureListener;
private boolean mBringToFront;
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
mWeight = a.getFraction(R.styleable.Panel_weight, 0, 1, 0.0f); // weight defaults to 0.0
if (mWeight < 0 || mWeight > 1) {
mWeight = 0.0f;
Log.w(TAG, a.getPositionDescription() + ": weight must be > 0 and <= 1");
}
mOpenedHandle = a.getDrawable(R.styleable.Panel_openedHandle);
mClosedHandle = a.getDrawable(R.styleable.Panel_closedHandle);
RuntimeException e = null;
mHandleId = a.getResourceId(R.styleable.Panel_handle, 0);
if (mHandleId == 0) {
e = new IllegalArgumentException(a.getPositionDescription() +
": The handle attribute is required and must refer to a valid child.");
}
mContentId = a.getResourceId(R.styleable.Panel_content, 0);
if (mContentId == 0) {
e = new IllegalArgumentException(a.getPositionDescription() +
": The content attribute is required and must refer to a valid child.");
}
a.recycle();
if (e != null) {
throw e;
}
mOrientation = (mPosition == TOP || mPosition == BOTTOM)? VERTICAL : HORIZONTAL;
setOrientation(mOrientation);
mState = State.READY;
mGestureListener = new PanelOnGestureListener();
mGestureDetector = new GestureDetector(mGestureListener);
mGestureDetector.setIsLongpressEnabled(false);
// i DON'T really know why i need this...
setBaselineAligned(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.
*
* @return True if operation was performed, false otherwise.
*
*/
public boolean setOpen(boolean open, boolean animate) {
if (mState == State.READY && 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();
}
return true;
}
return false;
}
/**
* 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(mHandleId);
if (mHandle == null) {
String name = getResources().getResourceEntryName(mHandleId);
throw new RuntimeException("Your Panel must have a child View whose id attribute is 'R.id." + name + "'");
}
mHandle.setOnTouchListener(touchListener);
mHandle.setOnClickListener(clickListener);
mContent = findViewById(mContentId);
if (mContent == null) {
String name = getResources().getResourceEntryName(mHandleId);
throw new RuntimeException("Your Panel must have a child View whose id attribute is 'R.id." + name + "'");
}
// 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.setClickable(true);
mContent.setVisibility(GONE);
if (mWeight > 0) {
ViewGroup.LayoutParams params = mContent.getLayoutParams();
if (mOrientation == VERTICAL) {
params.height = ViewGroup.LayoutParams.FILL_PARENT;
} else {
params.width = ViewGroup.LayoutParams.FILL_PARENT;
}
mContent.setLayoutParams(params);
}
}
@Override
protected void onAttachedToWindow() {
super.onAttachedToWindow();
ViewParent parent = getParent();
if (parent != null && parent instanceof FrameLayout) {
mBringToFront = true;
}
}
@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
if (mWeight > 0 && mContent.getVisibility() == VISIBLE) {
View parent = (View) getParent();
if (parent != null) {
if (mOrientation == VERTICAL) {
heightMeasureSpec = MeasureSpec.makeMeasureSpec((int) (parent.getHeight() * mWeight), MeasureSpec.EXACTLY);
} else {
widthMeasureSpec = MeasureSpec.makeMeasureSpec((int) (parent.getWidth() * mWeight), MeasureSpec.EXACTLY);
}
}
}
super.onMeasure(widthMeasureSpec, heightMeasureSpec);
}
@Override
protected void onLayout(boolean changed, int l, int t,
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