Merge "Adding a view to indicate space blocked by QSB when QSB is hidden" into ub-launcher3-calgary

<?xml version="1.0" encoding="utf-8"?>

<!--

     Copyright (C) 2016 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.

-->

<com.android.launcher3.QsbBlockerView

    xmlns:android="http://schemas.android.com/apk/res/android"

    android:layout_width="match_parent"

    android:layout_height="match_parent" />

 No newline at end of file

/*

 * Copyright (C) 2016 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.launcher3;

import android.animation.AnimatorSet;

import android.animation.ObjectAnimator;

import android.animation.ValueAnimator;

import android.animation.ValueAnimator.AnimatorUpdateListener;

import android.content.Context;

import android.graphics.Canvas;

import android.graphics.Color;

import android.graphics.Paint;

import android.util.AttributeSet;

import android.view.View;

import com.android.launcher3.Workspace.State;

/**

 * A simple view used to show the region blocked by QSB during drag and drop.

 */

public class QsbBlockerView extends View implements Workspace.OnStateChangeListener {

    private static final int VISIBLE_ALPHA = 100;

    private final Paint mBgPaint;

    public QsbBlockerView(Context context, AttributeSet attrs) {

        super(context, attrs);

        mBgPaint = new Paint(Paint.ANTI_ALIAS_FLAG);

        mBgPaint.setColor(Color.WHITE);

        mBgPaint.setAlpha(0);

    }

    @Override

    protected void onAttachedToWindow() {

        super.onAttachedToWindow();

        Workspace w = Launcher.getLauncher(getContext()).getWorkspace();

        w.setOnStateChangeListener(this);

        prepareStateChange(w.getState(), null);

    }

    @Override

    public void prepareStateChange(State toState, AnimatorSet targetAnim) {

        int finalAlpha = getAlphaForState(toState);

        if (targetAnim == null) {

            mBgPaint.setAlpha(finalAlpha);

            invalidate();

        } else {

            ObjectAnimator anim = ObjectAnimator.ofArgb(mBgPaint, "alpha", finalAlpha);

            anim.addUpdateListener(new AnimatorUpdateListener() {

                @Override

                public void onAnimationUpdate(ValueAnimator valueAnimator) {

                    invalidate();

                }

            });

            targetAnim.play(anim);

        }

    }

    private static int getAlphaForState(State state) {

        switch (state) {

            case SPRING_LOADED:

            case OVERVIEW:

            case OVERVIEW_HIDDEN:

                return VISIBLE_ALPHA;

        }

        return 0;

    }

    @Override

    protected void onDraw(Canvas canvas) {

        canvas.drawPaint(mBgPaint);

    }

}

        if (qsb == null) {

            // In transposed layout, we add the QSB in the Grid. As workspace does not touch the

            // edges, we do not need a full width QSB.

            if (mLauncher.getDeviceProfile().isVerticalBarLayout()) {

                qsb = mLauncher.getLayoutInflater().inflate(R.layout.qsb_container, firstPage, false);

            } else {

                qsb = new Space(getContext());

            }

            qsb = mLauncher.getLayoutInflater().inflate(

                    mLauncher.getDeviceProfile().isVerticalBarLayout()

                            ? R.layout.qsb_container : R.layout.qsb_blocker_view,

                    firstPage, false);

        }

        CellLayout.LayoutParams lp = new CellLayout.LayoutParams(0, 0, firstPage.getCountX(), 1);

        return workspaceAnim;

    }

    State getState() {

    public State getState() {

        return mState;

    }