ShowcaseAreaCalculator.java

/*
 * Copyright 2014 Alex Curran
 *
 * 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.github.amlcurran.showcaseview;

import android.graphics.Rect;
import android.util.Log;

/**
 * Class responsible for calculating where the Showcase should position itself
 */
class ShowcaseAreaCalculator {

    private final Rect mShowcaseRect = new Rect();

    /**
     * Creates a {@link android.graphics.Rect} which represents the area the showcase covers. Used
     * to calculate where best to place the text
     *
     * @return true if voidedArea has changed, false otherwise.
     */
    public boolean calculateShowcaseRect(float x, float y, ShowcaseDrawer showcaseDrawer) {

        int cx = (int) x, cy = (int) y;
        int dw = showcaseDrawer.getShowcaseWidth();
        int dh = showcaseDrawer.getShowcaseHeight();

        if (mShowcaseRect.left == cx - dw / 2 && mShowcaseRect.top == cy - dh / 2) {
            return false;
        }

        Log.d("ShowcaseView", "Recalculated");

        mShowcaseRect.left = cx - dw / 2;
        mShowcaseRect.top = cy - dh / 2;
        mShowcaseRect.right = cx + dw / 2;
        mShowcaseRect.bottom = cy + dh / 2;

        return true;

    }

    public Rect getShowcaseRect() {
        return mShowcaseRect;
    }

}