/*
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* Copyright (C) 2020 xuexiangjys(xuexiangjys@163.com)
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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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*/
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package com.zhaoyang.driver.utils.citypickerview.picker;
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import android.content.Context;
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import android.content.res.TypedArray;
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import android.graphics.Bitmap;
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import android.graphics.BitmapFactory;
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import android.graphics.Canvas;
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import android.graphics.Color;
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import android.graphics.Paint;
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import android.graphics.PorterDuff;
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import android.graphics.Rect;
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import android.util.AttributeSet;
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import android.view.MotionEvent;
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import android.view.View;
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import androidx.annotation.NonNull;
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import com.xuexiang.xui.utils.DensityUtils;
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import com.xuexiang.xui.utils.ResUtils;
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import com.xuexiang.xui.utils.ThemeUtils;
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import java.util.HashSet;
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import java.util.Set;
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/**
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* 滑块选择器
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*
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* @author xuexiang
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* @since 2020-01-04 18:30
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*/
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public class XSeekBar extends View {
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public interface OnSeekBarListener {
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/**
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* 数字改变回调
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*
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* @param seekBar 控件
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* @param newValue 新数值
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*/
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void onValueChanged(XSeekBar seekBar, int newValue);
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}
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private static int DEFAULT_TOUCH_TARGET_SIZE;
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private static int DEFAULT_TEXT_MIN_SPACE;
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private static final int DEFAULT_MAX = 100;
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/**
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* 刻度的宽度参数
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*/
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private static final float DEFAULT_BIG_SCALE_WITH = 1.7f;
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private static final float DEFAULT_MIDDLE_SCALE_WITH = 1.2f;
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private static final float DEFAULT_SMALL_SCALE_WITH = 1.0f;
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private final Paint mPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
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private int mLineStartX;
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private int mLineEndX;
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private int mLineLength;
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private int mMaxPosition = 0;
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private int mRange;
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private int mMiddleY = 0;
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private Rect mMaxTextRect = new Rect();
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private Rect mRulerTextRect = new Rect();
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/**
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* List of event IDs touching targets
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*/
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private Set<Integer> mTouchingMinTarget = new HashSet<>();
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private Set<Integer> mTouchingMaxTarget = new HashSet<>();
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private boolean mIsTouching = false;
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private boolean mLastTouchedMin;
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private int mSelectedNumber = -1;
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private boolean mIsFirstInit = true;
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private float mConvertFactor;
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private OnSeekBarListener mOnSeekBarListener;
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//========属性==========//
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private int mVerticalPadding;
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private int mInsideRangeColor;
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private int mOutsideRangeColor;
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private float mInsideRangeLineStrokeWidth;
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private float mOutsideRangeLineStrokeWidth;
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private int mMax = DEFAULT_MAX;
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private int mMin = 0;
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private Bitmap mSliderIcon;
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private Bitmap mSliderIconFocus;
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private boolean mIsLineRound;
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private boolean mIsShowBubble;
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private Bitmap mBubbleBitmap;
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private boolean mIsShowNumber;
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private int mNumberTextColor;
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private float mNumberTextSize;
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private float mNumberMarginBottom;
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private boolean mIsShowRuler;
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private int mRulerColor;
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private int mRulerTextColor;
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private float mRulerTextSize;
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private float mRulerMarginTop;
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private float mRulerDividerHeight;
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private float mRulerTextMarginTop;
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private int mRulerInterval;
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public XSeekBar(Context context) {
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this(context, null);
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}
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public XSeekBar(Context context, AttributeSet attrs) {
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this(context, attrs, com.xuexiang.xui.R.attr.XSeekBarStyle);
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}
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public XSeekBar(Context context, AttributeSet attrs, int defStyleAttr) {
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super(context, attrs, defStyleAttr);
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initAttrs(context, attrs, defStyleAttr);
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}
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public void initAttrs(Context context, AttributeSet attrs, int defStyleAttr) {
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DEFAULT_TOUCH_TARGET_SIZE = DensityUtils.dp2px(20);
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DEFAULT_TEXT_MIN_SPACE = DensityUtils.dp2px(2);
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int colorAccent = ThemeUtils.resolveColor(context, com.xuexiang.xui.R.attr.colorAccent);
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int colorControlNormal = ThemeUtils.resolveColor(context, com.xuexiang.xui.R.attr.colorControlNormal);
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if (attrs != null) {
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TypedArray array = context.obtainStyledAttributes(attrs, com.xuexiang.xui.R.styleable.XSeekBar, defStyleAttr, 0);
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mVerticalPadding = array.getDimensionPixelSize(com.xuexiang.xui.R.styleable.XSeekBar_xsb_verticalPadding, DensityUtils.dp2px(10));
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//滑条
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mInsideRangeColor = array.getColor(com.xuexiang.xui.R.styleable.XSeekBar_xsb_insideRangeLineColor, colorAccent);
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mOutsideRangeColor = array.getColor(com.xuexiang.xui.R.styleable.XSeekBar_xsb_outsideRangeLineColor, ResUtils.getColor(com.xuexiang.xui.R.color.default_xrs_outside_line_color));
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mInsideRangeLineStrokeWidth = array.getDimensionPixelSize(com.xuexiang.xui.R.styleable.XSeekBar_xsb_insideRangeLineStrokeWidth, DensityUtils.dp2px(5));
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mOutsideRangeLineStrokeWidth = array.getDimensionPixelSize(com.xuexiang.xui.R.styleable.XSeekBar_xsb_outsideRangeLineStrokeWidth, DensityUtils.dp2px(5));
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mMin = array.getInt(com.xuexiang.xui.R.styleable.XSeekBar_xsb_min, mMin);
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mMax = array.getInt(com.xuexiang.xui.R.styleable.XSeekBar_xsb_max, mMax);
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mSliderIcon = BitmapFactory.decodeResource(getResources(), array.getResourceId(com.xuexiang.xui.R.styleable.XSeekBar_xsb_sliderIcon, com.xuexiang.xui.R.drawable.xui_ic_slider_icon));
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mSliderIconFocus = BitmapFactory.decodeResource(getResources(), array.getResourceId(com.xuexiang.xui.R.styleable.XSeekBar_xsb_sliderIconFocus, com.xuexiang.xui.R.drawable.xui_ic_slider_icon));
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mIsLineRound = array.getBoolean(com.xuexiang.xui.R.styleable.XSeekBar_xsb_isLineRound, true);
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//气泡
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mIsShowBubble = array.getBoolean(com.xuexiang.xui.R.styleable.XSeekBar_xsb_isShowBubble, false);
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boolean isFitColor = array.getBoolean(com.xuexiang.xui.R.styleable.XSeekBar_xsb_isFitColor, true);
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mIsShowNumber = array.getBoolean(com.xuexiang.xui.R.styleable.XSeekBar_xsb_isShowNumber, true);
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mNumberTextColor = array.getColor(com.xuexiang.xui.R.styleable.XSeekBar_xsb_numberTextColor, colorAccent);
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mNumberTextSize = array.getDimensionPixelSize(com.xuexiang.xui.R.styleable.XSeekBar_xsb_numberTextSize, DensityUtils.sp2px(12));
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mNumberMarginBottom = array.getDimensionPixelSize(com.xuexiang.xui.R.styleable.XSeekBar_xsb_numberMarginBottom, DensityUtils.dp2px(2));
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if (isFitColor) {
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if (mIsShowBubble) {
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mNumberTextColor = Color.WHITE;
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}
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Bitmap bitmap = BitmapFactory.decodeResource(getResources(), array.getResourceId(com.xuexiang.xui.R.styleable.XSeekBar_xsb_bubbleResource, com.xuexiang.xui.R.drawable.xui_bg_bubble_blue));
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if (bitmap != null) {
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mBubbleBitmap = bitmap.copy(Bitmap.Config.ARGB_8888, true);
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Canvas canvas = new Canvas(mBubbleBitmap);
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canvas.drawColor(mInsideRangeColor, PorterDuff.Mode.SRC_IN);
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}
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} else {
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mBubbleBitmap = BitmapFactory.decodeResource(getResources(), array.getResourceId(com.xuexiang.xui.R.styleable.XSeekBar_xsb_bubbleResource, com.xuexiang.xui.R.drawable.xui_bg_bubble_blue));
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}
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//刻度尺
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mIsShowRuler = array.getBoolean(com.xuexiang.xui.R.styleable.XSeekBar_xsb_isShowRuler, false);
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mRulerColor = array.getColor(com.xuexiang.xui.R.styleable.XSeekBar_xsb_rulerColor, colorControlNormal);
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mRulerTextColor = array.getColor(com.xuexiang.xui.R.styleable.XSeekBar_xsb_rulerTextColor, colorControlNormal);
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mRulerTextSize = array.getDimensionPixelSize(com.xuexiang.xui.R.styleable.XSeekBar_xsb_rulerTextSize, DensityUtils.sp2px(12));
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mRulerMarginTop = array.getDimensionPixelSize(com.xuexiang.xui.R.styleable.XSeekBar_xsb_rulerMarginTop, DensityUtils.dp2px(4));
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mRulerDividerHeight = array.getDimensionPixelSize(com.xuexiang.xui.R.styleable.XSeekBar_xsb_rulerDividerHeight, DensityUtils.dp2px(4));
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mRulerTextMarginTop = array.getDimensionPixelSize(com.xuexiang.xui.R.styleable.XSeekBar_xsb_rulerTextMarginTop, DensityUtils.dp2px(4));
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mRulerInterval = array.getInt(com.xuexiang.xui.R.styleable.XSeekBar_xsb_rulerInterval, 20);
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array.recycle();
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}
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mRange = mMax - mMin;
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}
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@Override
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protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
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super.onMeasure(widthMeasureSpec, heightMeasureSpec);
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int widthMode = MeasureSpec.getMode(widthMeasureSpec);
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int widthSize = MeasureSpec.getSize(widthMeasureSpec);
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int heightMode = MeasureSpec.getMode(heightMeasureSpec);
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int heightSize = MeasureSpec.getSize(heightMeasureSpec);
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int desiredWidth = widthSize;
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int desiredHeight;
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getTextBounds(String.valueOf(mMax), mMaxTextRect);
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if (mIsShowNumber && mIsShowBubble) {
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desiredHeight = (int) (mSliderIcon.getHeight() + mNumberMarginBottom) + mBubbleBitmap.getHeight();
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} else if (mIsShowNumber) {
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desiredHeight = (int) (mSliderIcon.getHeight() + mNumberMarginBottom);
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} else {
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desiredHeight = mSliderIcon.getHeight();
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}
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int rulerHeight = (int) (mRulerMarginTop + mRulerDividerHeight * 3 + mRulerTextMarginTop + mRulerTextRect.height());
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if (mIsShowRuler) {
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getRulerTextBounds(String.valueOf(mMin), mRulerTextRect);
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desiredHeight += rulerHeight;
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}
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int width;
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int height = desiredHeight;
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if (widthMode == MeasureSpec.EXACTLY) {
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width = widthSize;
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} else if (widthMode == MeasureSpec.AT_MOST) {
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width = Math.min(desiredWidth, widthSize);
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} else {
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width = desiredWidth;
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}
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if (heightMode == MeasureSpec.EXACTLY) {
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height = heightSize;
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} else if (heightMode == MeasureSpec.AT_MOST) {
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height = desiredHeight;
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}
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height += mVerticalPadding;
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int marginStartEnd = mIsShowBubble ? mBubbleBitmap.getWidth() : Math.max(mSliderIcon.getWidth(), mMaxTextRect.width());
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mLineLength = (width - marginStartEnd);
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mMiddleY = mIsShowRuler ? height - rulerHeight - mSliderIcon.getHeight() / 2 : height - mSliderIcon.getHeight() / 2;
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mLineStartX = marginStartEnd / 2;
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mLineEndX = mLineLength + marginStartEnd / 2;
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calculateConvertFactor();
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if (mIsFirstInit) {
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setSelectedValue(mSelectedNumber != -1 ? mSelectedNumber : mMax);
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}
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height += mVerticalPadding;
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setMeasuredDimension(width, height);
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}
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@Override
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protected void onDraw(Canvas canvas) {
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drawEntireRangeLine(canvas);
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drawSelectedRangeLine(canvas);
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if (mIsShowNumber) {
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drawSelectedNumber(canvas);
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}
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drawRuler(canvas);
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drawSelectedTargets(canvas);
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}
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private void drawEntireRangeLine(Canvas canvas) {
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mPaint.setColor(mOutsideRangeColor);
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mPaint.setStrokeWidth(mOutsideRangeLineStrokeWidth);
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canvas.drawLine(mLineStartX, mMiddleY, mLineEndX, mMiddleY, mPaint);
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if (mIsLineRound) {
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mPaint.setColor(mInsideRangeColor);
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canvas.drawCircle(mLineStartX, mMiddleY, mOutsideRangeLineStrokeWidth / 2, mPaint);
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mPaint.setColor(mOutsideRangeColor);
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canvas.drawCircle(mLineEndX, mMiddleY, mOutsideRangeLineStrokeWidth / 2, mPaint);
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}
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}
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private void drawSelectedRangeLine(Canvas canvas) {
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mPaint.setStrokeWidth(mInsideRangeLineStrokeWidth);
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mPaint.setColor(mInsideRangeColor);
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canvas.drawLine(mLineStartX, mMiddleY, mMaxPosition, mMiddleY, mPaint);
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}
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private void drawSelectedNumber(Canvas canvas) {
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String max = String.valueOf(getSelectedNumber());
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getTextBounds(max, mMaxTextRect);
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float yText;
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//bubble
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if (mIsShowBubble) {
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float top = mMiddleY - mSliderIcon.getHeight() / 2 - mBubbleBitmap.getHeight() - mNumberMarginBottom;
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yText = top + mBubbleBitmap.getHeight() / 2 + mMaxTextRect.height() / 2 - 6;
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canvas.drawBitmap(mBubbleBitmap, mMaxPosition - mBubbleBitmap.getWidth() / 2, top, mPaint);
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} else {
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yText = mMiddleY - mSliderIcon.getHeight() / 2 - mNumberMarginBottom;
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}
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//text
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float maxX = mMaxPosition - mMaxTextRect.width() / 2;
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mPaint.setTextSize(mNumberTextSize);
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mPaint.setColor(mNumberTextColor);
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canvas.drawText(max, maxX, yText, mPaint);
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}
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private void drawRuler(Canvas canvas) {
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if (mIsShowRuler) {
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float startX = mLineStartX;
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float stopY = 0;
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float startY = 0;
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float divider = Float.valueOf(mRulerInterval) / 10f;
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float scaleLength = (float) mLineLength / (float) ((mMax - mMin) / divider) / divider;
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boolean isMinHasText = false;
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boolean isMaxHasText = false;
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for (int i = mMin; i <= mMax; i++) {
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if (i % mRulerInterval == 0) {
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//draw big scale
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startY = mMiddleY + mSliderIcon.getHeight() / 2 + mRulerMarginTop;
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stopY = startY + mRulerDividerHeight * 3;
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mPaint.setColor(mRulerTextColor);
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mPaint.setTextSize(mRulerTextSize);
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getRulerTextBounds(String.valueOf(i), mRulerTextRect);
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canvas.drawText(String.valueOf(i), startX - mRulerTextRect.width() / 2, stopY + mRulerTextRect.height() + mRulerTextMarginTop, mPaint);
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if (i == mMin) {
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isMinHasText = true;
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}
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if (i == mMax) {
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isMaxHasText = true;
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}
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mPaint.setStrokeWidth(DEFAULT_BIG_SCALE_WITH);
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mPaint.setColor(mRulerColor);
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canvas.drawLine(startX, startY, startX, stopY, mPaint);
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} else if (i % (mRulerInterval / 2) == 0 && mRulerInterval % 10 == 0) {
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//draw middle scale
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startY = mMiddleY + mSliderIcon.getHeight() / 2 + mRulerMarginTop;
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stopY = startY + mRulerDividerHeight * 2;
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mPaint.setStrokeWidth(DEFAULT_MIDDLE_SCALE_WITH);
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mPaint.setColor(mRulerColor);
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canvas.drawLine(startX, startY, startX, stopY, mPaint);
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} else {
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//draw small scale
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startY = mMiddleY + mSliderIcon.getHeight() / 2 + mRulerMarginTop;
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stopY = startY + mRulerDividerHeight;
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mPaint.setStrokeWidth(DEFAULT_SMALL_SCALE_WITH);
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if (i % (mRulerInterval / 10) == 0) {
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mPaint.setColor(mRulerColor);
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canvas.drawLine(startX, startY, startX, stopY, mPaint);
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}
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}
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if ((i == mMax && !isMaxHasText) || (i == mMin && !isMinHasText)) {
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mPaint.setColor(mRulerTextColor);
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mPaint.setTextSize(mRulerTextSize);
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getRulerTextBounds(String.valueOf(i), mRulerTextRect);
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float x = startX - mRulerTextRect.width() / 2;
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//修正最大值与最小值文本与满刻度文本太靠近时显示重叠问题
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if (i == mMax && i % mRulerInterval == 1) {
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x = startX + DEFAULT_TEXT_MIN_SPACE;
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}
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if (i == mMin && i % mRulerInterval == mRulerInterval - 1) {
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x = startX - mRulerTextRect.width() / 2 - DEFAULT_TEXT_MIN_SPACE;
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}
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canvas.drawText(String.valueOf(i), x, startY + mRulerDividerHeight * 3 + mRulerTextRect.height() + mRulerTextMarginTop, mPaint);
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}
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startX += scaleLength;
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}
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}
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}
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private void drawSelectedTargets(Canvas canvas) {
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mPaint.setColor(mInsideRangeColor);
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canvas.drawCircle(mMaxPosition, mMiddleY, DensityUtils.dp2px(3), mPaint);
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if (!mIsTouching) {
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canvas.drawBitmap(mSliderIcon, mMaxPosition - mSliderIcon.getWidth() / 2, mMiddleY - mSliderIcon.getWidth() / 2, mPaint);
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} else {
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canvas.drawBitmap(mSliderIconFocus, mMaxPosition - mSliderIcon.getWidth() / 2, mMiddleY - mSliderIcon.getWidth() / 2, mPaint);
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}
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}
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private void getTextBounds(String text, Rect rect) {
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mPaint.setTextSize(mNumberTextSize);
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mPaint.getTextBounds(text, 0, text.length(), rect);
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}
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private void getRulerTextBounds(String text, Rect rect) {
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mPaint.setTextSize(mRulerTextSize);
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mPaint.getTextBounds(text, 0, text.length(), rect);
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}
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private void jumpToPosition(int index, MotionEvent event) {
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//user has touched outside the target, lets jump to that position
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if (event.getX(index) > mMaxPosition && event.getX(index) <= mLineEndX) {
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mMaxPosition = (int) event.getX(index);
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invalidate();
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callMaxChangedCallbacks();
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} else if (event.getX(index) < mMaxPosition && event.getX(index) >= mLineStartX) {
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mMaxPosition = (int) event.getX(index);
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invalidate();
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callMaxChangedCallbacks();
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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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if (!isEnabled()) {
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return false;
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}
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mIsFirstInit = false;
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final int actionIndex = event.getActionIndex();
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switch (event.getActionMasked()) {
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case MotionEvent.ACTION_DOWN:
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mIsTouching = true;
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if (mLastTouchedMin) {
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if (!checkTouchingMinTarget(actionIndex, event)
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&& !checkTouchingMaxTarget(actionIndex, event)) {
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jumpToPosition(actionIndex, event);
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}
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} else if (!checkTouchingMaxTarget(actionIndex, event)
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&& !checkTouchingMinTarget(actionIndex, event)) {
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jumpToPosition(actionIndex, event);
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}
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invalidate();
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break;
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case MotionEvent.ACTION_UP:
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case MotionEvent.ACTION_POINTER_UP:
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mIsTouching = false;
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mTouchingMinTarget.remove(event.getPointerId(actionIndex));
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mTouchingMaxTarget.remove(event.getPointerId(actionIndex));
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invalidate();
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break;
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case MotionEvent.ACTION_MOVE:
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mIsTouching = true;
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for (int i = 0; i < event.getPointerCount(); i++) {
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if (mTouchingMinTarget.contains(event.getPointerId(i))) {
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int touchX = (int) event.getX(i);
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touchX = clamp(touchX, mLineStartX, mLineEndX);
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if (touchX >= mMaxPosition) {
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mMaxPosition = touchX;
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callMaxChangedCallbacks();
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}
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}
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if (mTouchingMaxTarget.contains(event.getPointerId(i))) {
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int touchX = (int) event.getX(i);
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touchX = clamp(touchX, mLineStartX, mLineEndX);
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mMaxPosition = touchX;
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callMaxChangedCallbacks();
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}
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}
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invalidate();
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break;
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case MotionEvent.ACTION_POINTER_DOWN:
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mIsTouching = true;
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for (int i = 0; i < event.getPointerCount(); i++) {
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if (mLastTouchedMin) {
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if (!checkTouchingMinTarget(i, event)
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&& !checkTouchingMaxTarget(i, event)) {
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jumpToPosition(i, event);
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}
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} else if (!checkTouchingMaxTarget(i, event)
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&& !checkTouchingMinTarget(i, event)) {
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jumpToPosition(i, event);
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}
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}
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break;
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case MotionEvent.ACTION_CANCEL:
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mIsTouching = false;
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mTouchingMinTarget.clear();
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mTouchingMaxTarget.clear();
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invalidate();
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break;
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default:
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break;
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}
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return true;
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}
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/**
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* Checks if given index is touching the min target. If touching start animation.
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*/
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private boolean checkTouchingMinTarget(int index, MotionEvent event) {
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if (isTouchingMinTarget(index, event)) {
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mLastTouchedMin = true;
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mTouchingMinTarget.add(event.getPointerId(index));
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return true;
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}
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return false;
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}
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/**
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* Checks if given index is touching the max target. If touching starts animation.
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*/
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private boolean checkTouchingMaxTarget(int index, MotionEvent event) {
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if (isTouchingMaxTarget(index, event)) {
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mLastTouchedMin = false;
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mTouchingMaxTarget.add(event.getPointerId(index));
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return true;
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}
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return false;
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}
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private void callMaxChangedCallbacks() {
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if (mOnSeekBarListener != null) {
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mOnSeekBarListener.onValueChanged(this, getSelectedNumber());
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}
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}
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|
private boolean isTouchingMinTarget(int pointerIndex, MotionEvent event) {
|
return false;
|
}
|
|
private boolean isTouchingMaxTarget(int pointerIndex, MotionEvent event) {
|
return event.getX(pointerIndex) > mMaxPosition - DEFAULT_TOUCH_TARGET_SIZE
|
&& event.getX(pointerIndex) < mMaxPosition + DEFAULT_TOUCH_TARGET_SIZE
|
&& event.getY(pointerIndex) > mMiddleY - DEFAULT_TOUCH_TARGET_SIZE
|
&& event.getY(pointerIndex) < mMiddleY + DEFAULT_TOUCH_TARGET_SIZE;
|
}
|
|
private void calculateConvertFactor() {
|
mConvertFactor = ((float) mRange) / mLineLength;
|
}
|
|
public int getSelectedNumber() {
|
return Math.round((mMaxPosition - mLineStartX) * mConvertFactor + mMin);
|
}
|
|
public void setDefaultValue(int value) {
|
mSelectedNumber = value;
|
setSelectedValue(value);
|
invalidate();
|
}
|
|
private void setSelectedValue(int selectedMax) {
|
mMaxPosition = Math.round(((selectedMax - mMin) / mConvertFactor) + mLineStartX);
|
callMaxChangedCallbacks();
|
}
|
|
public void setOnSeekBarListener(OnSeekBarListener listener) {
|
mOnSeekBarListener = listener;
|
}
|
|
public int getMin() {
|
return mMin;
|
}
|
|
public void setMin(int min) {
|
mMin = min;
|
mRange = mMax - min;
|
}
|
|
public int getMax() {
|
return mMax;
|
}
|
|
public void setMax(int max) {
|
mMax = max;
|
mRange = max - mMin;
|
}
|
|
public void setInterval(int rulerInterval) {
|
mRulerInterval = rulerInterval;
|
invalidate();
|
}
|
|
/**
|
* Resets selected values to MIN and MAX.
|
*/
|
public void reset() {
|
mMaxPosition = mLineEndX;
|
if (mOnSeekBarListener != null) {
|
mOnSeekBarListener.onValueChanged(this, getSelectedNumber());
|
}
|
invalidate();
|
}
|
|
|
/**
|
* Keeps Number value inside min/max bounds by returning min or max if outside of
|
* bounds. Otherwise will return the value without altering.
|
*/
|
private <T extends Number> T clamp(@NonNull T value, @NonNull T min, @NonNull T max) {
|
if (value.doubleValue() > max.doubleValue()) {
|
return max;
|
} else if (value.doubleValue() < min.doubleValue()) {
|
return min;
|
}
|
return value;
|
}
|
|
}
|
