71 lines
2.6 KiB
Java
71 lines
2.6 KiB
Java
/* Copyright (C) 2015-2024 Carsten Pfeiffer
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This file is part of Gadgetbridge.
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Gadgetbridge is free software: you can redistribute it and/or modify
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it under the terms of the GNU Affero General Public License as published
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by the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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Gadgetbridge is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU Affero General Public License for more details.
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You should have received a copy of the GNU Affero General Public License
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along with this program. If not, see <https://www.gnu.org/licenses/>. */
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package nodomain.freeyourgadget.gadgetbridge.activities.charts;
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import android.animation.ObjectAnimator;
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import android.animation.ValueAnimator;
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import com.github.mikephil.charting.animation.ChartAnimator;
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import com.github.mikephil.charting.data.Entry;
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import org.slf4j.Logger;
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import org.slf4j.LoggerFactory;
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public class SingleEntryValueAnimator extends ChartAnimator {
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private static final Logger LOG = LoggerFactory.getLogger(SingleEntryValueAnimator.class);
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private final Entry entry;
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private final ValueAnimator.AnimatorUpdateListener listener;
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private float previousValue;
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public SingleEntryValueAnimator(Entry singleEntry, ValueAnimator.AnimatorUpdateListener listener) {
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super(listener);
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this.listener = listener;
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entry = singleEntry;
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}
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public void setEntryYValue(float value) {
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this.previousValue = entry.getY();
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entry.setY(value);
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}
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@Override
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public void animateY(int durationMillis) {
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// we start with the previous value and animate the change to the
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// next value.
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// as our animation values are not used as absolute values, but as factors,
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// we have to calculate the proper factors in advance. The entry already has
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// the new value, so we create a factor to calculate the old value from the
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// new value.
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float startAnim;
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float endAnim = 1f;
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if (entry.getY() == 0f) {
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startAnim = 0f;
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} else {
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startAnim = previousValue / entry.getY();
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}
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// LOG.debug("anim factors: " + startAnim + ", " + endAnim);
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ObjectAnimator animatorY = ObjectAnimator.ofFloat(this, "phaseY", startAnim, endAnim);
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animatorY.setDuration(durationMillis);
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animatorY.addUpdateListener(listener);
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animatorY.start();
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}
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}
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