79 lines
2.2 KiB
Java
79 lines
2.2 KiB
Java
/*
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* Copyright 2016 Hippo Seven
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.hippo.ehviewer.widget;
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import android.content.Context;
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import android.graphics.Canvas;
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import android.util.AttributeSet;
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import android.view.MotionEvent;
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import androidx.appcompat.widget.AppCompatSeekBar;
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public class ReversibleSeekBar extends AppCompatSeekBar {
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private boolean mReverse;
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public ReversibleSeekBar(Context context) {
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super(context);
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}
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public ReversibleSeekBar(Context context, AttributeSet attrs) {
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super(context, attrs);
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}
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public ReversibleSeekBar(Context context, AttributeSet attrs, int defStyleAttr) {
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super(context, attrs, defStyleAttr);
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}
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public void setReverse(boolean reverse) {
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mReverse = reverse;
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invalidate();
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}
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@Override
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public void draw(Canvas canvas) {
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boolean reverse = mReverse;
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int saveCount = 0;
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if (reverse) {
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saveCount = canvas.save();
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float px = this.getWidth() / 2.0f;
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float py = this.getHeight() / 2.0f;
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canvas.scale(-1, 1, px, py);
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}
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super.draw(canvas);
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if (reverse) {
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canvas.restoreToCount(saveCount);
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}
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}
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@Override
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public boolean onTouchEvent(MotionEvent event) {
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boolean reverse = mReverse;
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float x = 0.0f, y = 0.0f;
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if (reverse) {
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x = event.getX();
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y = event.getY();
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event.setLocation(getWidth() - x, y);
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}
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boolean result = super.onTouchEvent(event);
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if (reverse) {
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event.setLocation(x, y);
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}
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return result;
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}
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}
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