src/com/android/contacts/quickcontact/FloatingChildLayout.java - platform/packages/apps/Contacts - Git at Google

 /*
  * Copyright (C) 2011 The Android Open Source Project
  *
  * 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.android.contacts.quickcontact;

 import com.android.contacts.R;

 import android.animation.Animator;
 import android.animation.AnimatorListenerAdapter;
 import android.content.Context;
 import android.content.res.Resources;
 import android.graphics.Rect;
 import android.graphics.drawable.Drawable;
 import android.graphics.drawable.ColorDrawable;
 import android.graphics.drawable.TransitionDrawable;
 import android.os.Handler;
 import android.util.AttributeSet;
 import android.util.Log;
 import android.view.MotionEvent;
 import android.view.View;
 import android.view.ViewPropertyAnimator;
 import android.view.animation.AnimationUtils;
 import android.widget.FrameLayout;
 import android.widget.PopupWindow;

 /**
  * Layout containing single child {@link View} which it attempts to center
  * around {@link #setChildTargetScreen(Rect)}.
  * <p>
  * Updates drawable state to be {@link android.R.attr#state_first} when child is
  * above target, and {@link android.R.attr#state_last} when child is below
  * target. Also updates {@link Drawable#setLevel(int)} on child
  * {@link View#getBackground()} to reflect horizontal center of target.
  * <p>
  * The reason for this approach is because target {@link Rect} is in screen
  * coordinates disregarding decor insets; otherwise something like
  * {@link PopupWindow} might work better.
  */
 public class FloatingChildLayout extends FrameLayout {
     private static final String TAG = "FloatingChildLayout";
     private int mFixedTopPosition;
     private View mChild;
     private boolean mIsShowingChild;
     private Rect mTargetScreen = new Rect();
     private final int mAnimationDuration;
     private final TransitionDrawable mBackground;

     // Black, 50% alpha as per the system default.
     private static final int DIM_BACKGROUND_COLOR = 0x7F000000;

     public FloatingChildLayout(Context context, AttributeSet attrs) {
         super(context, attrs);
         final Resources resources = getResources();
         mFixedTopPosition =
                 resources.getDimensionPixelOffset(R.dimen.quick_contact_top_position);
         mAnimationDuration = resources.getInteger(android.R.integer.config_shortAnimTime);

         final ColorDrawable[] drawables =
             { new ColorDrawable(0), new ColorDrawable(DIM_BACKGROUND_COLOR) };
         mBackground = new TransitionDrawable(drawables);
         super.setBackground(mBackground);
     }

     @Override
     protected void onFinishInflate() {
         mChild = findViewById(android.R.id.content);
         mChild.setDuplicateParentStateEnabled(true);

         // this will be expanded in showChild()
         mChild.setScaleX(0.5f);
         mChild.setScaleY(0.5f);
         mChild.setAlpha(0.0f);

         mIsShowingChild = false;
     }

     public View getChild() {
         return mChild;
     }

     /**
      * FloatingChildLayout manages its own background, don't set it.
      */
     @Override
     public void setBackground(Drawable background) {
         Log.wtf(TAG, "don't setBackground(), it is managed internally");
     }

     /**
      * Set {@link Rect} in screen coordinates that {@link #getChild()} should be
      * centered around.
      */
     public void setChildTargetScreen(Rect targetScreen) {
         mTargetScreen = targetScreen;
         requestLayout();
     }

     /**
      * Return {@link #mTargetScreen} in local window coordinates, taking any
      * decor insets into account.
      */
     private Rect getTargetInWindow() {
         final Rect windowScreen = new Rect();
         getWindowVisibleDisplayFrame(windowScreen);

         final Rect target = new Rect(mTargetScreen);
         target.offset(-windowScreen.left, -windowScreen.top);
         return target;
     }

     @Override
     protected void onLayout(boolean changed, int left, int top, int right, int bottom) {

         final View child = mChild;
         final Rect target = getTargetInWindow();

         final int childWidth = child.getMeasuredWidth();
         final int childHeight = child.getMeasuredHeight();

         if (mFixedTopPosition != -1) {
             // Horizontally centered, vertically fixed position
             final int childLeft = (getWidth() - childWidth) / 2;
             final int childTop = mFixedTopPosition;
             layoutChild(child, childLeft, childTop);
         } else {
             // default is centered horizontally around target...
             final int childLeft = target.centerX() - (childWidth / 2);
             // ... and vertically aligned a bit below centered
             final int childTop = target.centerY() - Math.round(childHeight * 0.35f);

             // when child is outside bounds, nudge back inside
             final int clampedChildLeft = clampDimension(childLeft, childWidth, getWidth());
             final int clampedChildTop = clampDimension(childTop, childHeight, getHeight());

             layoutChild(child, clampedChildLeft, clampedChildTop);
         }
     }

     private static int clampDimension(int value, int size, int max) {
         // when larger than bounds, just center
         if (size > max) {
             return (max - size) / 2;
         }

         // clamp to bounds
         return Math.min(Math.max(value, 0), max - size);
     }

     private static void layoutChild(View child, int left, int top) {
         child.layout(left, top, left + child.getMeasuredWidth(), top + child.getMeasuredHeight());
     }

     /** Begin animating {@link #getChild()} visible. */
     public void showChild(final Runnable onAnimationEndRunnable) {
         if (mIsShowingChild) return;
         mIsShowingChild = true;

         // TODO: understand this.
         // For some reason this needs wait a tick in order to avoid jank.
         // Maybe because we set up a hardware layer in animateScale()?
         // Probably not, since it should also be required in hideChild().
         new Handler().post(new Runnable() {
             @Override public void run() {
                 animateBackground(false);
             }
         });

         animateScale(false, onAnimationEndRunnable);
     }

     /** Begin animating {@link #getChild()} invisible. */
     public void hideChild(final Runnable onAnimationEndRunnable) {
         if (!mIsShowingChild) return;
         mIsShowingChild = false;

         animateBackground(true);
         animateScale(true, onAnimationEndRunnable);
     }

     private void animateBackground(boolean isExitAnimation) {
         if (isExitAnimation) {
             mBackground.reverseTransition(mAnimationDuration);
         } else {
             mBackground.startTransition(mAnimationDuration);
         }
     }

     /** Creates the open/close animation */
     private void animateScale(boolean isExitAnimation, final Runnable onAnimationEndRunnable) {
         mChild.setPivotX(mTargetScreen.centerX() - mChild.getLeft());
         mChild.setPivotY(mTargetScreen.centerY() - mChild.getTop());

         final int scaleInterpolator = isExitAnimation
                 ? android.R.interpolator.accelerate_quint
                 : android.R.interpolator.decelerate_quint;
         final float scaleTarget = isExitAnimation ? 0.5f : 1.0f;

         ViewPropertyAnimator animator = mChild.animate().withLayer()
                 .setDuration(mAnimationDuration)
                 .setInterpolator(AnimationUtils.loadInterpolator(getContext(), scaleInterpolator))
                 .scaleX(scaleTarget)
                 .scaleY(scaleTarget)
                 .alpha(isExitAnimation ? 0.0f : 1.0f)
                 .setListener(new AnimatorListenerAdapter() {
                     @Override
                     public void onAnimationEnd(Animator animation) {
                         if (onAnimationEndRunnable != null) onAnimationEndRunnable.run();
                     }
                 });
     }

     private View.OnTouchListener mOutsideTouchListener;

     public void setOnOutsideTouchListener(View.OnTouchListener listener) {
         mOutsideTouchListener = listener;
     }

     @Override
     public boolean onTouchEvent(MotionEvent event) {
         // at this point, touch wasn't handled by child view; assume outside
         if (mOutsideTouchListener != null) {
             return mOutsideTouchListener.onTouch(this, event);
         }
         return false;
     }
 }
	/*
	* Copyright (C) 2011 The Android Open Source Project
	*
	* 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.android.contacts.quickcontact;

	import com.android.contacts.R;

	import android.animation.Animator;
	import android.animation.AnimatorListenerAdapter;
	import android.content.Context;
	import android.content.res.Resources;
	import android.graphics.Rect;
	import android.graphics.drawable.Drawable;
	import android.graphics.drawable.ColorDrawable;
	import android.graphics.drawable.TransitionDrawable;
	import android.os.Handler;
	import android.util.AttributeSet;
	import android.util.Log;
	import android.view.MotionEvent;
	import android.view.View;
	import android.view.ViewPropertyAnimator;
	import android.view.animation.AnimationUtils;
	import android.widget.FrameLayout;
	import android.widget.PopupWindow;

	/**
	* Layout containing single child {@link View} which it attempts to center
	* around {@link #setChildTargetScreen(Rect)}.
	* <p>
	* Updates drawable state to be {@link android.R.attr#state_first} when child is
	* above target, and {@link android.R.attr#state_last} when child is below
	* target. Also updates {@link Drawable#setLevel(int)} on child
	* {@link View#getBackground()} to reflect horizontal center of target.
	* <p>
	* The reason for this approach is because target {@link Rect} is in screen
	* coordinates disregarding decor insets; otherwise something like
	* {@link PopupWindow} might work better.
	*/
	public class FloatingChildLayout extends FrameLayout {
	private static final String TAG = "FloatingChildLayout";
	private int mFixedTopPosition;
	private View mChild;
	private boolean mIsShowingChild;
	private Rect mTargetScreen = new Rect();
	private final int mAnimationDuration;
	private final TransitionDrawable mBackground;

	// Black, 50% alpha as per the system default.
	private static final int DIM_BACKGROUND_COLOR = 0x7F000000;

	public FloatingChildLayout(Context context, AttributeSet attrs) {
	super(context, attrs);
	final Resources resources = getResources();
	mFixedTopPosition =
	resources.getDimensionPixelOffset(R.dimen.quick_contact_top_position);
	mAnimationDuration = resources.getInteger(android.R.integer.config_shortAnimTime);

	final ColorDrawable[] drawables =
	{ new ColorDrawable(0), new ColorDrawable(DIM_BACKGROUND_COLOR) };
	mBackground = new TransitionDrawable(drawables);
	super.setBackground(mBackground);
	}

	@Override
	protected void onFinishInflate() {
	mChild = findViewById(android.R.id.content);
	mChild.setDuplicateParentStateEnabled(true);

	// this will be expanded in showChild()
	mChild.setScaleX(0.5f);
	mChild.setScaleY(0.5f);
	mChild.setAlpha(0.0f);

	mIsShowingChild = false;
	}

	public View getChild() {
	return mChild;
	}

	/**
	* FloatingChildLayout manages its own background, don't set it.
	*/
	@Override
	public void setBackground(Drawable background) {
	Log.wtf(TAG, "don't setBackground(), it is managed internally");
	}

	/**
	* Set {@link Rect} in screen coordinates that {@link #getChild()} should be
	* centered around.
	*/
	public void setChildTargetScreen(Rect targetScreen) {
	mTargetScreen = targetScreen;
	requestLayout();
	}

	/**
	* Return {@link #mTargetScreen} in local window coordinates, taking any
	* decor insets into account.
	*/
	private Rect getTargetInWindow() {
	final Rect windowScreen = new Rect();
	getWindowVisibleDisplayFrame(windowScreen);

	final Rect target = new Rect(mTargetScreen);
	target.offset(-windowScreen.left, -windowScreen.top);
	return target;
	}

	@Override
	protected void onLayout(boolean changed, int left, int top, int right, int bottom) {

	final View child = mChild;
	final Rect target = getTargetInWindow();

	final int childWidth = child.getMeasuredWidth();
	final int childHeight = child.getMeasuredHeight();

	if (mFixedTopPosition != -1) {
	// Horizontally centered, vertically fixed position
	final int childLeft = (getWidth() - childWidth) / 2;
	final int childTop = mFixedTopPosition;
	layoutChild(child, childLeft, childTop);
	} else {
	// default is centered horizontally around target...
	final int childLeft = target.centerX() - (childWidth / 2);
	// ... and vertically aligned a bit below centered
	final int childTop = target.centerY() - Math.round(childHeight * 0.35f);

	// when child is outside bounds, nudge back inside
	final int clampedChildLeft = clampDimension(childLeft, childWidth, getWidth());
	final int clampedChildTop = clampDimension(childTop, childHeight, getHeight());

	layoutChild(child, clampedChildLeft, clampedChildTop);
	}
	}

	private static int clampDimension(int value, int size, int max) {
	// when larger than bounds, just center
	if (size > max) {
	return (max - size) / 2;
	}

	// clamp to bounds
	return Math.min(Math.max(value, 0), max - size);
	}

	private static void layoutChild(View child, int left, int top) {
	child.layout(left, top, left + child.getMeasuredWidth(), top + child.getMeasuredHeight());
	}

	/** Begin animating {@link #getChild()} visible. */
	public void showChild(final Runnable onAnimationEndRunnable) {
	if (mIsShowingChild) return;
	mIsShowingChild = true;

	// TODO: understand this.
	// For some reason this needs wait a tick in order to avoid jank.
	// Maybe because we set up a hardware layer in animateScale()?
	// Probably not, since it should also be required in hideChild().
	new Handler().post(new Runnable() {
	@Override public void run() {
	animateBackground(false);
	}
	});

	animateScale(false, onAnimationEndRunnable);
	}

	/** Begin animating {@link #getChild()} invisible. */
	public void hideChild(final Runnable onAnimationEndRunnable) {
	if (!mIsShowingChild) return;
	mIsShowingChild = false;

	animateBackground(true);
	animateScale(true, onAnimationEndRunnable);
	}

	private void animateBackground(boolean isExitAnimation) {
	if (isExitAnimation) {
	mBackground.reverseTransition(mAnimationDuration);
	} else {
	mBackground.startTransition(mAnimationDuration);
	}
	}

	/** Creates the open/close animation */
	private void animateScale(boolean isExitAnimation, final Runnable onAnimationEndRunnable) {
	mChild.setPivotX(mTargetScreen.centerX() - mChild.getLeft());
	mChild.setPivotY(mTargetScreen.centerY() - mChild.getTop());

	final int scaleInterpolator = isExitAnimation
	? android.R.interpolator.accelerate_quint
	: android.R.interpolator.decelerate_quint;
	final float scaleTarget = isExitAnimation ? 0.5f : 1.0f;

	ViewPropertyAnimator animator = mChild.animate().withLayer()
	.setDuration(mAnimationDuration)
	.setInterpolator(AnimationUtils.loadInterpolator(getContext(), scaleInterpolator))
	.scaleX(scaleTarget)
	.scaleY(scaleTarget)
	.alpha(isExitAnimation ? 0.0f : 1.0f)
	.setListener(new AnimatorListenerAdapter() {
	@Override
	public void onAnimationEnd(Animator animation) {
	if (onAnimationEndRunnable != null) onAnimationEndRunnable.run();
	}
	});
	}

	private View.OnTouchListener mOutsideTouchListener;

	public void setOnOutsideTouchListener(View.OnTouchListener listener) {
	mOutsideTouchListener = listener;
	}

	@Override
	public boolean onTouchEvent(MotionEvent event) {
	// at this point, touch wasn't handled by child view; assume outside
	if (mOutsideTouchListener != null) {
	return mOutsideTouchListener.onTouch(this, event);
	}
	return false;
	}
	}