自定义Switch小部件

package com.polyak.iconswitch; import com.polyak.iconswitch.attrs.IswAttrSet; import com.polyak.iconswitch.utils.AttrUtils; import com.polyak.iconswitch.utils.DeviceUtils; import ohos.agp.animation.Animator; import ohos.agp.animation.AnimatorValue; import ohos.agp.colors.RgbColor; import ohos.agp.components.AttrSet; import ohos.agp.components.Component; import ohos.agp.components.ComponentContainer; import ohos.agp.components.element.ShapeElement; import ohos.agp.components.element.VectorElement; import ohos.agp.render.Canvas; import ohos.agp.render.Paint; import ohos.agp.render.PixelMapHolder; import ohos.agp.utils.Color; import ohos.agp.utils.Point; import ohos.agp.utils.RectFloat; import ohos.app.Context; import ohos.media.image.PixelMap; import ohos.multimodalinput.event.TouchEvent; import java.math.BigDecimal; import java.util.Locale; /** * IconSwitch主要实现类 */ public final class IconSwitch extends ComponentContainer implements Component.DrawTask, Component.EstimateSizeListener, Component.TouchEventListener { private static final int MIN_ICON_SIZE_VP = 12; private static final int DEFAULT_IMAGE_SIZE_VP = 18; private int switchWidth; private int switchHeight; private int iconSize; private int iconTop; private int iconBottom; private int iconOffset; private int thumbColorLeft; private int thumbColorRight; private int thumbDiameter; private PixelMapHolder leftHolder; private PixelMapHolder rightHolder; private PixelMapHolder leftHolderInactive; private PixelMapHolder rightHolderInactive; private VectorElement leftVector; private VectorElement rightVector; private VectorElement leftVectorInactive; private VectorElement rightVectorInactive; private Paint bgPaint; private RectFloat bgRF; private float bgRadius; private Paint thumbPaint; private Point thumbPoint; private float thumbRadius; private Paint iconPaint; private RectFloat iconLeftRF; private RectFloat iconRightRF; private boolean moving = false; private float touchLastX; private Checked currentChecked; private CheckedChangeListener listener; public IconSwitch(Context context) { super(context); init(null); } public IconSwitch(Context context, AttrSet attrSet) { super(context, attrSet); init(attrSet); } public IconSwitch(Context context, AttrSet attrSet, String styleName) { super(context, attrSet, styleName); init(attrSet); } /** * 初始化操作 * * @param attrs attrs */ private void init(AttrSet attrs) { initSwitchView(); ShapeElement shape = new ShapeElement(); shape.setRgbColor(RgbColor.fromArgbInt(getContext().getColor(ResourceTable.Color_transparent))); setBackground(shape); iconSize = DeviceUtils.vpToPx(getContext(), DEFAULT_IMAGE_SIZE_VP); initAttr(attrs); if (leftVector != null) { leftVector.setAntiAlias(true); } if (rightVector != null) { rightVector.setAntiAlias(true); } if (leftVectorInactive != null) { leftVectorInactive.setAntiAlias(true); } if (rightVectorInactive != null) { rightVectorInactive.setAntiAlias(true); } thumbPaint.setColor(new Color(currentChecked == Checked.LEFT ? thumbColorLeft : thumbColorRight)); calculateSwitchDimensions(); addDrawTask(this); setEstimateSizeListener(this); setTouchEventListener(this); } private void initAttr(AttrSet attrs) { int colorDefBackground = getContext().getColor(ResourceTable.Color_isw_defaultBg); String checked = Checked.LEFT.name(); PixelMap leftMap = null; PixelMap leftMapInactive = null; PixelMap rightMap = null; PixelMap rightMapInactive = null; if (attrs != null) { iconSize = AttrUtils.getInteger(attrs, IswAttrSet.ISW_ICON_SIZE, iconSize); leftMap = AttrUtils.getPixelMap(attrs, IswAttrSet.ISW_ICON_LEFT); rightMap = AttrUtils.getPixelMap(attrs, IswAttrSet.ISW_ICON_RIGHT); leftMapInactive = AttrUtils.getPixelMap(attrs, IswAttrSet.ISW_ICON_LEFT_INACTIVE); rightMapInactive = AttrUtils.getPixelMap(attrs, IswAttrSet.ISW_ICON_RIGHT_INACTIVE); leftVector = AttrUtils.getVector(attrs, IswAttrSet.ISW_ICON_LEFT); rightVector = AttrUtils.getVector(attrs, IswAttrSet.ISW_ICON_RIGHT); leftVectorInactive = AttrUtils.getVector(attrs, IswAttrSet.ISW_ICON_LEFT_INACTIVE); rightVectorInactive = AttrUtils.getVector(attrs, IswAttrSet.ISW_ICON_RIGHT_INACTIVE); int colorDefThumb = getContext().getColor(ResourceTable.Color_colorAccent); colorDefBackground = AttrUtils.getColor(attrs, IswAttrSet.ISW_BACKGROUND_COLOR, colorDefBackground); thumbColorLeft = AttrUtils.getColor(attrs, IswAttrSet.ISW_THUMB_COLOR_LEFT, colorDefThumb); thumbColorRight = AttrUtils.getColor(attrs, IswAttrSet.ISW_THUMB_COLOR_RIGHT, colorDefThumb); checked = AttrUtils.getString(attrs, IswAttrSet.ISW_DEFAULT_SELECTION, checked); } if (leftMap != null) { leftHolder = new PixelMapHolder(leftMap); } if (rightMap != null) { rightHolder = new PixelMapHolder(rightMap); } if (leftMapInactive != null) { leftHolderInactive = new PixelMapHolder(leftMapInactive); } if (rightMapInactive != null) { rightHolderInactive = new PixelMapHolder(rightMapInactive); } bgPaint.setColor(new Color(colorDefBackground)); if (checked.toUpperCase(Locale.getDefault()).equals(Checked.RIGHT.name())) { currentChecked = Checked.RIGHT; } else { currentChecked = Checked.LEFT; } } private void initSwitchView() { bgPaint = new Paint(); bgPaint.setAntiAlias(true); bgRF = new RectFloat(); thumbPaint = new Paint(); thumbPaint.setAntiAlias(true); thumbPoint = new Point(); iconPaint = new Paint(); iconPaint.setAntiAlias(true); iconLeftRF = new RectFloat(); iconRightRF = new RectFloat(); } private void calculateSwitchDimensions() { iconSize = Math.max(iconSize, DeviceUtils.vpToPx(getContext(), MIN_ICON_SIZE_VP)); switchWidth = BigDecimal.valueOf(iconSize) .multiply(BigDecimal.valueOf(4)).intValue(); switchHeight = Math.round(BigDecimal.valueOf(iconSize) .multiply(BigDecimal.valueOf(2f)).floatValue()); iconOffset = Math.round(BigDecimal.valueOf(iconSize) .multiply(BigDecimal.valueOf(0.8f)).floatValue()); iconTop = BigDecimal.valueOf(switchHeight) .subtract(BigDecimal.valueOf(iconSize)) .divide(BigDecimal.valueOf(2), BigDecimal.ROUND_HALF_UP).intValue(); iconBottom = BigDecimal.valueOf(iconTop).add(BigDecimal.valueOf(iconSize)).intValue(); thumbDiameter = switchHeight; } @Override public boolean onEstimateSize(int widthEstimateConfig, int heightEstimateConfig) { int overshootPadding = Math.round(BigDecimal.valueOf(thumbDiameter) .multiply(BigDecimal.valueOf(0.1f)).floatValue()); int defW = BigDecimal.valueOf(overshootPadding) .multiply(BigDecimal.valueOf(2)) .add(BigDecimal.valueOf(switchWidth)).intValue(); int width = getSize(widthEstimateConfig, defW); int height = getSize(heightEstimateConfig, switchHeight); measureBgSize(iconSize, width, height); measureIconSize(width, height); setEstimatedSize( EstimateSpec.getChildSizeWithMode(width, width, EstimateSpec.NOT_EXCEED), EstimateSp