gistfile1.java

package com.getbase.floatingactionbutton;

import android.content.Context;
import android.content.res.TypedArray;
import android.graphics.Canvas;
import android.graphics.drawable.Drawable;
import android.graphics.drawable.LayerDrawable;
import android.os.Parcel;
import android.os.Parcelable;
import android.support.annotation.ColorRes;
import android.support.annotation.NonNull;
import android.util.AttributeSet;
import android.view.ContextThemeWrapper;
import android.view.View;
import android.view.ViewGroup;
import android.view.animation.DecelerateInterpolator;
import android.view.animation.Interpolator;
import android.view.animation.OvershootInterpolator;
import android.widget.TextView;

import com.nineoldandroids.animation.AnimatorSet;
import com.nineoldandroids.animation.ObjectAnimator;
import com.nineoldandroids.animation.PropertyValuesHolder;
import com.nineoldandroids.view.ViewHelper;
import com.whatsonindia.R;
import com.whatsonindia.adapterlist.CategoryAdapter.ViewHolder;

public class FloatingActionsMenu extends ViewGroup {
	public static final int EXPAND_UP = 0;
	public static final int EXPAND_DOWN = 1;
	public static final int EXPAND_LEFT = 2;
	public static final int EXPAND_RIGHT = 3;

	private static final int ANIMATION_DURATION = 300;
	private static final float COLLAPSED_PLUS_ROTATION = 0f;
	private static final float EXPANDED_PLUS_ROTATION = 90f + 45f;

	private int mAddButtonPlusColor;
	private int mAddButtonColorNormal;
	private int mAddButtonColorPressed;
	private int mExpandDirection;

	private int mButtonSpacing;
	private int mLabelsMargin;
	private int mLabelsVerticalOffset;

	private boolean mExpanded;

	private AnimatorSet mExpandAnimation = new AnimatorSet()
			.setDuration(ANIMATION_DURATION);
	private AnimatorSet mCollapseAnimation = new AnimatorSet()
			.setDuration(ANIMATION_DURATION);
	private AddFloatingActionButton mAddButton;
	private RotatingDrawable mRotatingDrawable;
	private int mLabelsStyle;
	private int mButtonsCount;

	public FloatingActionsMenu(Context context) {
		this(context, null);
	}

	public FloatingActionsMenu(Context context, AttributeSet attrs) {
		super(context, attrs);
		init(context, attrs);
	}

	public FloatingActionsMenu(Context context, AttributeSet attrs, int defStyle) {
		super(context, attrs, defStyle);
		init(context, attrs);
	}

	private void init(Context context, AttributeSet attributeSet) {
		mButtonSpacing = (int) (getResources().getDimension(
				R.dimen.fab_actions_spacing)
				- getResources().getDimension(R.dimen.fab_shadow_radius) - getResources()
				.getDimension(R.dimen.fab_shadow_offset));
		mLabelsMargin = getResources().getDimensionPixelSize(
				R.dimen.fab_labels_margin);
		mLabelsVerticalOffset = getResources().getDimensionPixelSize(
				R.dimen.fab_shadow_offset);

		TypedArray attr = context.obtainStyledAttributes(attributeSet,
				R.styleable.FloatingActionsMenu, 0, 0);
		mAddButtonPlusColor = attr.getColor(
				R.styleable.FloatingActionsMenu_fab_addButtonPlusIconColor,
				getColor(android.R.color.white));
		mAddButtonColorNormal = attr.getColor(
				R.styleable.FloatingActionsMenu_fab_addButtonColorNormal,
				getColor(android.R.color.holo_blue_dark));
		mAddButtonColorPressed = attr.getColor(
				R.styleable.FloatingActionsMenu_fab_addButtonColorPressed,
				getColor(android.R.color.holo_blue_light));
		mExpandDirection = attr.getInt(
				R.styleable.FloatingActionsMenu_fab_expandDirection, EXPAND_UP);
		mLabelsStyle = attr.getResourceId(
				R.styleable.FloatingActionsMenu_fab_labelStyle, 0);
		attr.recycle();

		if (mLabelsStyle != 0 && expandsHorizontally()) {
			throw new IllegalStateException(
					"Action labels in horizontal expand orientation is not supported.");
		}

		createAddButton(context);
	}

	private boolean expandsHorizontally() {
		return mExpandDirection == EXPAND_LEFT
				|| mExpandDirection == EXPAND_RIGHT;
	}

	private static class RotatingDrawable extends LayerDrawable {
		public RotatingDrawable(Drawable drawable) {
			super(new Drawable[] { drawable });
		}

		private float mRotation;

		@SuppressWarnings("UnusedDeclaration")
		public float getRotation() {
			return mRotation;
		}

		@SuppressWarnings("UnusedDeclaration")
		public void setRotation(float rotation) {
			mRotation = rotation;
			invalidateSelf();
		}

		@Override
		public void draw(Canvas canvas) {
			canvas.save();
			canvas.rotate(mRotation, getBounds().centerX(), getBounds()
					.centerY());
			super.draw(canvas);
			canvas.restore();
		}
	}

	private void createAddButton(Context context) {
		mAddButton = new AddFloatingActionButton(context) {
			@Override
			void updateBackground() {
				mPlusColor = mAddButtonPlusColor;
				mColorNormal = mAddButtonColorNormal;
				mColorPressed = mAddButtonColorPressed;
				super.updateBackground();
			}

			@Override
			Drawable getIconDrawable() {
				final RotatingDrawable rotatingDrawable = new RotatingDrawable(
						super.getIconDrawable());
				mRotatingDrawable = rotatingDrawable;

				final OvershootInterpolator interpolator = new OvershootInterpolator();

				final ObjectAnimator collapseAnimator = ObjectAnimator.ofFloat(
						rotatingDrawable, "rotation", EXPANDED_PLUS_ROTATION,
						COLLAPSED_PLUS_ROTATION);
				final ObjectAnimator expandAnimator = ObjectAnimator.ofFloat(
						rotatingDrawable, "rotation", COLLAPSED_PLUS_ROTATION,
						EXPANDED_PLUS_ROTATION);

				collapseAnimator.setInterpolator(interpolator);
				expandAnimator.setInterpolator(interpolator);

				mExpandAnimation.play(expandAnimator);
				mCollapseAnimation.play(collapseAnimator);

				return rotatingDrawable;
			}
		};

		mAddButton.setId(R.id.fab_expand_menu_button);
		mAddButton.setOnClickListener(new OnClickListener() {
			@Override
			public void onClick(View v) {
				toggle();
			}
		});

		addView(mAddButton, super.generateDefaultLayoutParams());
	}

	public void addButton(FloatingActionButton button) {
		addView(button, mButtonsCount - 1);
		mButtonsCount++;

		if (mLabelsStyle != 0) {
			createLabels();
		}
	}

	private int getColor(@ColorRes int id) {
		return getResources().getColor(id);
	}

	@Override
	protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
		measureChildren(widthMeasureSpec, heightMeasureSpec);

		int width = 0;
		int height = 0;

		int maxLabelWidth = 0;

		for (int i = 0; i < mButtonsCount; i++) {
			View child = getChildAt(i);

			switch (mExpandDirection) {
			case EXPAND_UP:
			case EXPAND_DOWN:
				width = Math.max(width, child.getMeasuredWidth());
				height += child.getMeasuredHeight();
				break;
			case EXPAND_LEFT:
			case EXPAND_RIGHT:
				width += child.getMeasuredWidth();
				height = Math.max(height, child.getMeasuredHeight());
				break;
			}

			if (!expandsHorizontally()) {
				TextView label = (TextView) child.getTag(R.id.fab_label);
				if (label != null) {
					maxLabelWidth = Math.max(maxLabelWidth,
							label.getMeasuredWidth());
				}
			}
		}

		if (!expandsHorizontally()) {
			width += maxLabelWidth + mLabelsMargin;
		}

		switch (mExpandDirection) {
		case EXPAND_UP:
		case EXPAND_DOWN:
			height += mButtonSpacing * (getChildCount() - 1);
			height = adjustForOvershoot(height);
			break;
		case EXPAND_LEFT:
		case EXPAND_RIGHT:
			width += mButtonSpacing * (getChildCount() - 1);
			width = adjustForOvershoot(width);
			break;
		}

		setMeasuredDimension(width, height);
	}

	private int adjustForOvershoot(int dimension) {
		return dimension * 12 / 10;
	}

	@Override
	protected void onLayout(boolean changed, int l, int t, int r, int b) {
		switch (mExpandDirection) {
		case EXPAND_UP:
		case EXPAND_DOWN:
			boolean expandUp = mExpandDirection == EXPAND_UP;

			int addButtonY = expandUp ? b - t - mAddButton.getMeasuredHeight()
					: 0;
			int addButtonLeft = r - l - mAddButton.getMeasuredWidth();
			mAddButton.layout(addButtonLeft, addButtonY, addButtonLeft
					+ mAddButton.getMeasuredWidth(),
					addButtonY + mAddButton.getMeasuredHeight());

			int labelsRight = addButtonLeft - mLabelsMargin;

			int nextY = expandUp ? addButtonY - mButtonSpacing : addButtonY
					+ mAddButton.getMeasuredHeight() + mButtonSpacing;

			for (int i = mButtonsCount - 1; i >= 0; i--) {
				final View child = getChildAt(i);

				if (child == mAddButton)
					continue;

				int childX = addButtonLeft
						+ (mAddButton.getMeasuredWidth() - child
								.getMeasuredWidth()) / 2;
				int childY = expandUp ? nextY - child.getMeasuredHeight()
						: nextY;
				child.layout(childX, childY, childX + child.getMeasuredWidth(),
						childY + child.getMeasuredHeight());

				float collapsedTranslation = addButtonY - childY;
				float expandedTranslation = 0f;

				ViewHelper.setTranslationY(child,
						mExpanded ? expandedTranslation : collapsedTranslation);
				// child.setTranslationY(mExpanded ? expandedTranslation :
				// collapsedTranslation);
				ViewHelper.setAlpha(child, mExpanded ? 1f : 0f);
				// child.setAlpha(mExpanded ? 1f : 0f);

				LayoutParams params = (LayoutParams) child.getLayoutParams();
				params.mCollapseDir.setFloatValues(expandedTranslation,
						collapsedTranslation);
				params.mExpandDir.setFloatValues(collapsedTranslation,
						expandedTranslation);
				params.setAnimationsTarget(child);

				View label = (View) child.getTag(R.id.fab_label);

				if (label != null) {
					int labelLeft = labelsRight - label.getMeasuredWidth();
					int labelTop = childY
							- mLabelsVerticalOffset
							+ (child.getMeasuredHeight() - label
									.getMeasuredHeight()) / 2;

					label.layout(labelLeft, labelTop, labelsRight, labelTop
							+ label.getMeasuredHeight());

					ViewHelper.setTranslationY(label,
							mExpanded ? expandedTranslation
									: collapsedTranslation);
					// label.setTranslationY(mExpanded ? expandedTranslation :
					// collapsedTranslation);
					ViewHelper.setAlpha(label, mExpanded ? 1f : 0f);
					// label.setAlpha(mExpanded ? 1f : 0f);

					LayoutParams labelParams = (LayoutParams) label
							.getLayoutParams();
					labelParams.mCollapseDir.setFloatValues(
							expandedTranslation, collapsedTranslation);
					labelParams.mExpandDir.setFloatValues(collapsedTranslation,
							expandedTranslation);
					labelParams.setAnimationsTarget(label);
				}

				nextY = expandUp ? childY - mButtonSpacing : childY
						+ child.getMeasuredHeight() + mButtonSpacing;
			}
			break;

		case EXPAND_LEFT:
		case EXPAND_RIGHT:
			boolean expandLeft = mExpandDirection == EXPAND_LEFT;

			int addButtonX = expandLeft ? r - l - mAddButton.getMeasuredWidth()
					: 0;
			mAddButton.layout(addButtonX, 0,
					addButtonX + mAddButton.getMeasuredWidth(),
					mAddButton.getMeasuredHeight());

			int nextX = expandLeft ? addButtonX - mButtonSpacing : addButtonX
					+ mAddButton.getMeasuredWidth() + mButtonSpacing;

			for (int i = mButtonsCount - 1; i >= 0; i--) {
				final View child = getChildAt(i);

				if (child == mAddButton)
					continue;

				int childX = expandLeft ? nextX - child.getMeasuredWidth()
						: nextX;
				int childY = (mAddButton.getMeasuredHeight() - child
						.getMeasuredHeight()) / 2;
				child.layout(childX, childY, childX + child.getMeasuredWidth(),
						childY + child.getMeasuredHeight());

				float collapsedTranslation = addButtonX - childX;
				float expandedTranslation = 0f;

				ViewHelper.setTranslationY(child,
						mExpanded ? expandedTranslation : collapsedTranslation);

				ViewHelper.setAlpha(child, mExpanded ? 1f : 0f);

				// child.setTranslationX(mExpanded ? expandedTranslation :
				// collapsedTranslation);
				// child.setAlpha(mExpanded ? 1f : 0f);

				LayoutParams params = (LayoutParams) child.getLayoutParams();
				params.mCollapseDir.setFloatValues(expandedTranslation,
						collapsedTranslation);
				params.mExpandDir.setFloatValues(collapsedTranslation,
						expandedTranslation);
				params.setAnimationsTarget(child);

				nextX = expandLeft ? childX - mButtonSpacing : childX
						+ child.getMeasuredWidth() + mButtonSpacing;
			}

			break;
		}
	}

	@Override
	protected ViewGroup.LayoutParams generateDefaultLayoutParams() {
		return new LayoutParams(super.generateDefaultLayoutParams());
	}

	@Override
	public ViewGroup.LayoutParams generateLayoutParams(AttributeSet attrs) {
		return new LayoutParams(super.generateLayoutParams(attrs));
	}

	@Override
	protected ViewGroup.LayoutParams generateLayoutParams(
			ViewGroup.LayoutParams p) {
		return new LayoutParams(super.generateLayoutParams(p));
	}

	@Override
	protected boolean checkLayoutParams(ViewGroup.LayoutParams p) {
		return super.checkLayoutParams(p);
	}

	private static Interpolator sExpandInterpolator = new OvershootInterpolator();
	private static Interpolator sCollapseInterpolator = new DecelerateInterpolator(
			3f);
	private static Interpolator sAlphaExpandInterpolator = new DecelerateInterpolator();

	private class LayoutParams extends ViewGroup.LayoutParams {

		private ObjectAnimator mExpandDir = new ObjectAnimator();
		private ObjectAnimator mExpandAlpha = new ObjectAnimator();
		private ObjectAnimator mCollapseDir = new ObjectAnimator();
		private ObjectAnimator mCollapseAlpha = new ObjectAnimator();

		public LayoutParams(ViewGroup.LayoutParams source) {
			super(source);

			mExpandDir.setInterpolator(sExpandInterpolator);
			mExpandAlpha.setInterpolator(sAlphaExpandInterpolator);
			mCollapseDir.setInterpolator(sCollapseInterpolator);
			mCollapseAlpha.setInterpolator(sCollapseInterpolator);

//			mCollapseAlpha.setProperty(View.ALPHA);
			mCollapseAlpha.setPropertyName("alpha");
			mCollapseAlpha.setFloatValues(1f, 0f);

//			mExpandAlpha.setProperty(View.ALPHA);
			mExpandAlpha.setPropertyName("alpha");
			mExpandAlpha.setFloatValues(0f, 1f);

			switch (mExpandDirection) {
			case EXPAND_UP:
			case EXPAND_DOWN:
				mCollapseDir.setPropertyName("translationY");
//				mCollapseDir.setProperty(View.TRANSLATION_Y);
				mExpandDir.setPropertyName("translationY");
//				mExpandDir.setProperty(View.TRANSLATION_Y);
				break;
			case EXPAND_LEFT:
			case EXPAND_RIGHT:
				mCollapseDir.setPropertyName("translationX");
//				mCollapseDir.setProperty(View.TRANSLATION_X);
				mExpandDir.setPropertyName("translationX");
//				mExpandDir.setProperty(View.TRANSLATION_X);
				break;
			}

			mExpandAnimation.play(mExpandAlpha);
			mExpandAnimation.play(mExpandDir);

			mCollapseAnimation.play(mCollapseAlpha);
			mCollapseAnimation.play(mCollapseDir);
		}

		public void setAnimationsTarget(View view) {
			mCollapseAlpha.setTarget(view);
			mCollapseDir.setTarget(view);
			mExpandAlpha.setTarget(view);
			mExpandDir.setTarget(view);
		}
	}

	@Override
	protected void onFinishInflate() {
		super.onFinishInflate();

		bringChildToFront(mAddButton);
		mButtonsCount = getChildCount();

		if (mLabelsStyle != 0) {
			createLabels();
		}
	}

	private void createLabels() {
		Context context = new ContextThemeWrapper(getContext(), mLabelsStyle);

		for (int i = 0; i < mButtonsCount; i++) {
			FloatingActionButton button = (FloatingActionButton) getChildAt(i);
			String title = button.getTitle();

			if (button == mAddButton || title == null
					|| button.getTag(R.id.fab_label) != null)
				continue;

			TextView label = new TextView(context);
			label.setText(button.getTitle());
			addView(label);

			button.setTag(R.id.fab_label, label);
		}
	}

	public void collapse() {
		if (mExpanded) {
			mExpanded = false;
			mCollapseAnimation.start();
			mExpandAnimation.cancel();
		}
	}

	public void toggle() {
		if (mExpanded) {
			collapse();
		} else {
			expand();
		}
	}

	public void expand() {
		if (!mExpanded) {
			mExpanded = true;
			mCollapseAnimation.cancel();
			mExpandAnimation.start();
		}
	}

	public boolean isExpanded() {
		return mExpanded;
	}

	@Override
	public Parcelable onSaveInstanceState() {
		Parcelable superState = super.onSaveInstanceState();
		SavedState savedState = new SavedState(superState);
		savedState.mExpanded = mExpanded;

		return savedState;
	}

	@Override
	public void onRestoreInstanceState(Parcelable state) {
		if (state instanceof SavedState) {
			SavedState savedState = (SavedState) state;
			mExpanded = savedState.mExpanded;

			if (mRotatingDrawable != null) {
				mRotatingDrawable
						.setRotation(mExpanded ? EXPANDED_PLUS_ROTATION
								: COLLAPSED_PLUS_ROTATION);
			}

			super.onRestoreInstanceState(savedState.getSuperState());
		} else {
			super.onRestoreInstanceState(state);
		}
	}

	public static class SavedState extends BaseSavedState {
		public boolean mExpanded;

		public SavedState(Parcelable parcel) {
			super(parcel);
		}

		private SavedState(Parcel in) {
			super(in);
			mExpanded = in.readInt() == 1;
		}

		@Override
		public void writeToParcel(@NonNull Parcel out, int flags) {
			super.writeToParcel(out, flags);
			out.writeInt(mExpanded ? 1 : 0);
		}

		public static final Creator<SavedState> CREATOR = new Creator<SavedState>() {

			@Override
			public SavedState createFromParcel(Parcel in) {
				return new SavedState(in);
			}

			@Override
			public SavedState[] newArray(int size) {
				return new SavedState[size];
			}
		};
	}
}