838 lines
29 KiB
Kotlin
838 lines
29 KiB
Kotlin
/*
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* Copyright (C) 2017 JRummy Apps Inc.
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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.jrummyapps.android.colorpicker
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import android.annotation.SuppressLint
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import android.content.Context
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import android.graphics.*
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import android.graphics.Paint.Align
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import android.graphics.Shader.TileMode
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import android.os.Bundle
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import android.os.Parcelable
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import android.util.AttributeSet
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import android.util.TypedValue
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import android.view.MotionEvent
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import android.view.View
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import androidx.annotation.ColorInt
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import kotlin.math.max
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import kotlin.math.min
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/**
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* Displays a color picker to the user and allow them to select a color. A slider for the alpha channel is also available.
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* Enable it by setting setAlphaSliderVisible(boolean) to true.
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*/
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class ColorPickerView @JvmOverloads constructor(
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context: Context,
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attrs: AttributeSet? = null,
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defStyle: Int = 0,
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) : View(context, attrs, defStyle) {
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companion object {
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private const val DEFAULT_BORDER_COLOR = -0x919192
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private const val DEFAULT_SLIDER_COLOR = -0x424243
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private const val HUE_PANEL_WDITH_DP = 30
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private const val ALPHA_PANEL_HEIGH_DP = 20
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private const val PANEL_SPACING_DP = 10
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private const val CIRCLE_TRACKER_RADIUS_DP = 5
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private const val SLIDER_TRACKER_SIZE_DP = 4
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private const val SLIDER_TRACKER_OFFSET_DP = 2
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/**
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* The width in pixels of the border
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* surrounding all color panels.
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*/
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private const val BORDER_WIDTH_PX = 1
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}
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interface OnColorChangedListener {
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fun onColorChanged(newColor: Int)
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}
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private class BitmapCache(
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var canvas: Canvas? = null,
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var bitmap: Bitmap? = null,
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var value: Float = 0f,
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)
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/**
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* The width in px of the hue panel.
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*/
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private val huePanelWidthPx =
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DrawingUtils.dpToPx(context, HUE_PANEL_WDITH_DP.toFloat())
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/**
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* The height in px of the alpha panel
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*/
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private val alphaPanelHeightPx =
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DrawingUtils.dpToPx(context, ALPHA_PANEL_HEIGH_DP.toFloat())
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/**
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* The distance in px between the different
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* color panels.
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*/
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private val panelSpacingPx =
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DrawingUtils.dpToPx(context, PANEL_SPACING_DP.toFloat())
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/**
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* The radius in px of the color palette tracker circle.
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*/
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private val circleTrackerRadiusPx =
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DrawingUtils.dpToPx(context, CIRCLE_TRACKER_RADIUS_DP.toFloat())
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/**
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* The px which the tracker of the hue or alpha panel
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* will extend outside of its bounds.
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*/
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private val sliderTrackerOffsetPx =
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DrawingUtils.dpToPx(context, SLIDER_TRACKER_OFFSET_DP.toFloat())
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/**
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* Height of slider tracker on hue panel,
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* width of slider on alpha panel.
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*/
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private val sliderTrackerSizePx =
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DrawingUtils.dpToPx(context, SLIDER_TRACKER_SIZE_DP.toFloat())
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/**
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* the current value of the text that will be shown in the alpha slider.
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* null to disable text.
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*/
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@Suppress("MemberVisibilityCanBePrivate")
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var alphaSliderText: String? = null
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set(value) {
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if (field != value) {
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field = value
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invalidate()
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}
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}
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// the color the view should show.
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var color: Int
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get() = Color.HSVToColor(alpha, floatArrayOf(hue, sat, bri))
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set(color) {
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setColor(color, false)
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}
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@ColorInt
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var sliderTrackerColor = DEFAULT_SLIDER_COLOR
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set(value) {
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field = value
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hueAlphaTrackerPaint.color = value
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invalidate()
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}
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@ColorInt
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var borderColor = DEFAULT_BORDER_COLOR
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set(value) {
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if (field != value) {
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field = value
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invalidate()
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}
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}
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private val satValPaint = Paint()
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private val satValTrackerPaint = Paint().apply {
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style = Paint.Style.STROKE
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strokeWidth = DrawingUtils.dpToPx(context, 2f).toFloat()
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isAntiAlias = true
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}
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private val alphaPaint = Paint()
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private val alphaTextPaint = Paint().apply {
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color = -0xe3e3e4
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textSize = DrawingUtils.dpToPx(context, 14f).toFloat()
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isAntiAlias = true
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textAlign = Align.CENTER
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isFakeBoldText = true
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}
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private val hueAlphaTrackerPaint = Paint().apply {
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color = sliderTrackerColor
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style = Paint.Style.STROKE
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strokeWidth = DrawingUtils.dpToPx(context, 2f).toFloat()
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isAntiAlias = true
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}
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private val borderPaint = Paint()
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private var valShader: Shader? = null
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private var satShader: Shader? = null
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private var alphaShader: Shader? = null
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/*
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* We cache a bitmap of the sat/val panel which is expensive to draw each time.
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* We can reuse it when the user is sliding the circle picker as long as the hue isn't changed.
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*/
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private var satValBackgroundCache: BitmapCache? = null
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/* We cache the hue background to since its also very expensive now. */
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private var hueBackgroundCache: BitmapCache? = null
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/* Current values */
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private var alpha = 0xff
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private var hue = 360f
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private var sat = 0f
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private var bri = 0f
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private var showAlphaPanel = false
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/**
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* Minimum required padding. The offset from the
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* edge we must have or else the finger tracker will
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* get clipped when it's drawn outside of the view.
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*/
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private val mRequiredPadding =
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context.resources.getDimensionPixelSize(R.dimen.cpv_required_padding)
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/**
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* The Rect in which we are allowed to draw.
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* Trackers can extend outside slightly,
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* due to the required padding we have set.
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*/
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private var drawingRect: Rect? = null
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private var satValRect: Rect? = null
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private var hueRect: Rect? = null
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private var alphaRect: Rect? = null
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private var startTouchPoint: Point? = null
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private var alphaPatternDrawable: AlphaPatternDrawable? = null
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/**
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* OnColorChangedListener to get notified when the color selected by the user has changed.
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*/
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var onColorChangedListener: OnColorChangedListener? = null
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public override fun onSaveInstanceState(): Parcelable {
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val state = Bundle()
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state.putParcelable("instanceState", super.onSaveInstanceState())
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state.putInt("alpha", alpha)
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state.putFloat("hue", hue)
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state.putFloat("sat", sat)
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state.putFloat("val", bri)
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state.putBoolean("show_alpha", showAlphaPanel)
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state.putString("alpha_text", alphaSliderText)
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return state
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}
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public override fun onRestoreInstanceState(state: Parcelable) {
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if (state is Bundle) {
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alpha = state.getInt("alpha")
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hue = state.getFloat("hue")
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sat = state.getFloat("sat")
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bri = state.getFloat("val")
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showAlphaPanel = state.getBoolean("show_alpha")
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alphaSliderText = state.getString("alpha_text")
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super.onRestoreInstanceState(state.getParcelableCompat("instanceState"))
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} else {
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super.onRestoreInstanceState(state)
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}
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}
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init {
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//Load those if set in xml resource file.
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var a = context.obtainStyledAttributes(attrs, R.styleable.ColorPickerView)
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showAlphaPanel = a.getBoolean(R.styleable.ColorPickerView_cpv_alphaChannelVisible, false)
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alphaSliderText = a.getString(R.styleable.ColorPickerView_cpv_alphaChannelText)
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sliderTrackerColor = a.getColor(R.styleable.ColorPickerView_cpv_sliderColor, -0x424243)
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borderColor = a.getColor(R.styleable.ColorPickerView_cpv_borderColor, -0x919192)
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a.recycle()
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// If no specific border/slider color has been
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// set we take the default secondary text color
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// as border/slider color. Thus it will adopt
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// to theme changes automatically.
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val value = TypedValue()
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a = context.obtainStyledAttributes(
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value.data,
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intArrayOf(android.R.attr.textColorSecondary)
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)
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if (borderColor == DEFAULT_BORDER_COLOR) {
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borderColor = a.getColor(0, DEFAULT_BORDER_COLOR)
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}
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if (sliderTrackerColor == DEFAULT_SLIDER_COLOR) {
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sliderTrackerColor = a.getColor(0, DEFAULT_SLIDER_COLOR)
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}
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a.recycle()
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//Needed for receiving trackball motion events.
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isFocusable = true
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isFocusableInTouchMode = true
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}
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override fun onDraw(canvas: Canvas) {
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val drawingRect = this.drawingRect
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if (drawingRect == null || drawingRect.width() <= 0 || drawingRect.height() <= 0) {
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return
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}
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drawSatValPanel(canvas)
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drawHuePanel(canvas)
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drawAlphaPanel(canvas)
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}
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private fun drawSatValPanel(canvas: Canvas) {
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val rect = this.satValRect ?: return
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val drawingRect = this.drawingRect ?: return
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if (BORDER_WIDTH_PX > 0) {
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borderPaint.color = borderColor
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canvas.drawRect(
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drawingRect.left.toFloat(),
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drawingRect.top.toFloat(),
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(rect.right + BORDER_WIDTH_PX).toFloat(),
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(rect.bottom + BORDER_WIDTH_PX).toFloat(), borderPaint
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)
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}
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if (valShader == null) {
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//Black gradient has either not been created or the view has been resized.
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valShader = LinearGradient(
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rect.left.toFloat(),
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rect.top.toFloat(),
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rect.left.toFloat(),
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rect.bottom.toFloat(),
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-0x1,
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-0x1000000,
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TileMode.CLAMP
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)
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}
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//If the hue has changed we need to recreate the cache.
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if (satValBackgroundCache == null || satValBackgroundCache!!.value != hue) {
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if (satValBackgroundCache == null) {
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satValBackgroundCache = BitmapCache()
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}
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//We create our bitmap in the cache if it doesn't exist.
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if (satValBackgroundCache!!.bitmap == null) {
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satValBackgroundCache!!.bitmap = Bitmap
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.createBitmap(rect.width(), rect.height(), Bitmap.Config.ARGB_8888)
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}
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//We create the canvas once so we can draw on our bitmap and the hold on to it.
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if (satValBackgroundCache!!.canvas == null) {
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satValBackgroundCache!!.canvas = Canvas(satValBackgroundCache!!.bitmap!!)
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}
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val rgb = Color.HSVToColor(floatArrayOf(hue, 1f, 1f))
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satShader = LinearGradient(
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rect.left.toFloat(),
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rect.top.toFloat(),
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rect.right.toFloat(),
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rect.top.toFloat(),
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-0x1,
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rgb,
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TileMode.CLAMP
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)
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satValPaint.shader = ComposeShader(
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valShader!!,
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satShader!!,
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PorterDuff.Mode.MULTIPLY
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)
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// Finally we draw on our canvas, the result will be
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// stored in our bitmap which is already in the cache.
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// Since this is drawn on a canvas not rendered on
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// screen it will automatically not be using the
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// hardware acceleration. And this was the code that
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// wasn't supported by hardware acceleration which mean
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// there is no need to turn it of anymore. The rest of
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// the view will still be hw accelerated.
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satValBackgroundCache!!.canvas!!.drawRect(
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0f, 0f,
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satValBackgroundCache!!.bitmap!!.width.toFloat(),
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satValBackgroundCache!!.bitmap!!.height.toFloat(),
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satValPaint
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)
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//We set the hue value in our cache to which hue it was drawn with,
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//then we know that if it hasn't changed we can reuse our cached bitmap.
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satValBackgroundCache!!.value = hue
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}
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// We draw our bitmap from the cached, if the hue has changed
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// then it was just recreated otherwise the old one will be used.
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canvas.drawBitmap(satValBackgroundCache!!.bitmap!!, null, rect, null)
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val p = satValToPoint(sat, bri)
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satValTrackerPaint.color = -0x1000000
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canvas.drawCircle(
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p.x.toFloat(), p.y.toFloat(), (circleTrackerRadiusPx - DrawingUtils.dpToPx(
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context, 1f
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)).toFloat(), satValTrackerPaint
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)
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satValTrackerPaint.color = -0x222223
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canvas.drawCircle(
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p.x.toFloat(),
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p.y.toFloat(),
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circleTrackerRadiusPx.toFloat(),
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satValTrackerPaint
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)
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}
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private fun drawHuePanel(canvas: Canvas) {
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val rect = hueRect
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if (BORDER_WIDTH_PX > 0) {
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borderPaint.color = borderColor
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canvas.drawRect(
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(rect!!.left - BORDER_WIDTH_PX).toFloat(), (
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rect.top - BORDER_WIDTH_PX).toFloat(), (
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rect.right + BORDER_WIDTH_PX).toFloat(), (
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rect.bottom + BORDER_WIDTH_PX).toFloat(),
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borderPaint
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)
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}
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if (hueBackgroundCache == null) {
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val hueBackgroundCache = BitmapCache()
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.also { this.hueBackgroundCache = it }
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Bitmap.createBitmap(rect!!.width(), rect.height(), Bitmap.Config.ARGB_8888)
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.also {
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hueBackgroundCache.bitmap = it
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hueBackgroundCache.canvas = Canvas(it)
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}
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val hueColors = IntArray((rect.height() + 0.5f).toInt())
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// Generate array of all colors, will be drawn as individual lines.
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var h = 360f
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for (i in hueColors.indices) {
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hueColors[i] = Color.HSVToColor(floatArrayOf(h, 1f, 1f))
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h -= 360f / hueColors.size
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}
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// Time to draw the hue color gradient,
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// its drawn as individual lines which
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// will be quite many when the resolution is high
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// and/or the panel is large.
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val linePaint = Paint()
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linePaint.strokeWidth = 0f
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for (i in hueColors.indices) {
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linePaint.color = hueColors[i]
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hueBackgroundCache.canvas?.drawLine(
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0f,
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i.toFloat(),
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hueBackgroundCache.bitmap?.width?.toFloat() ?: 0f,
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i.toFloat(),
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linePaint
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)
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}
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}
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canvas.drawBitmap(hueBackgroundCache!!.bitmap!!, null, rect!!, null)
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val p = hueToPoint(hue)
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val r = RectF()
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r.left = (rect.left - sliderTrackerOffsetPx).toFloat()
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r.right = (rect.right + sliderTrackerOffsetPx).toFloat()
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r.top = p.y - sliderTrackerSizePx / 2f
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r.bottom = p.y + sliderTrackerSizePx / 2f
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canvas.drawRoundRect(r, 2f, 2f, hueAlphaTrackerPaint)
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}
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private fun drawAlphaPanel(canvas: Canvas) {
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if (!showAlphaPanel) return
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val rect = this.alphaRect ?: return
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val alphaPatternDrawable = this.alphaPatternDrawable ?: return
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/*
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* Will be drawn with hw acceleration, very fast.
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* Also the AlphaPatternDrawable is backed by a bitmap
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* generated only once if the size does not change.
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*/
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if (BORDER_WIDTH_PX > 0) {
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borderPaint.color = borderColor
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canvas.drawRect(
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(rect.left - BORDER_WIDTH_PX).toFloat(), (
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rect.top - BORDER_WIDTH_PX).toFloat(), (
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rect.right + BORDER_WIDTH_PX).toFloat(), (
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rect.bottom + BORDER_WIDTH_PX).toFloat(),
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borderPaint
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)
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}
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alphaPatternDrawable.draw(canvas)
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val hsv = floatArrayOf(hue, sat, bri)
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val color = Color.HSVToColor(hsv)
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val acolor = Color.HSVToColor(0, hsv)
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alphaShader = LinearGradient(
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rect.left.toFloat(),
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rect.top.toFloat(),
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rect.right.toFloat(),
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rect.top.toFloat(),
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color, acolor, TileMode.CLAMP
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)
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alphaPaint.shader = alphaShader
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canvas.drawRect(rect, alphaPaint)
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alphaSliderText
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?.takeIf { it.isNotEmpty() }
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?.let {
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canvas.drawText(
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it,
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rect.centerX().toFloat(),
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(rect.centerY() + DrawingUtils.dpToPx(
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context, 4f
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)).toFloat(),
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alphaTextPaint
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)
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}
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val p = alphaToPoint(alpha)
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val r = RectF()
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r.left = p.x - sliderTrackerSizePx / 2f
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r.right = p.x + sliderTrackerSizePx / 2f
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r.top = (rect.top - sliderTrackerOffsetPx).toFloat()
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r.bottom = (rect.bottom + sliderTrackerOffsetPx).toFloat()
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canvas.drawRoundRect(r, 2f, 2f, hueAlphaTrackerPaint)
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}
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private fun hueToPoint(hue: Float): Point {
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val rect = hueRect
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val height = rect!!.height().toFloat()
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val p = Point()
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p.y = (height - hue * height / 360f + rect.top).toInt()
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p.x = rect.left
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return p
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}
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private fun satValToPoint(sat: Float, inValue: Float): Point {
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val rect = satValRect!!
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val height = rect.height().toFloat()
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val width = rect.width().toFloat()
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val p = Point()
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p.x = (sat * width + rect.left).toInt()
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p.y = ((1f - inValue) * height + rect.top).toInt()
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return p
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}
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private fun alphaToPoint(alpha: Int): Point {
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val rect = alphaRect
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val width = rect!!.width().toFloat()
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val p = Point()
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p.x = (width - alpha * width / 0xff + rect.left).toInt()
|
|
p.y = rect.top
|
|
return p
|
|
}
|
|
|
|
private fun pointToSatVal(xArg: Float, yArg: Float): FloatArray {
|
|
var x = xArg
|
|
var y = yArg
|
|
val rect = satValRect
|
|
val result = FloatArray(2)
|
|
val width = rect!!.width().toFloat()
|
|
val height = rect.height().toFloat()
|
|
x = when {
|
|
x < rect.left -> 0f
|
|
x > rect.right -> width
|
|
else -> x - rect.left
|
|
}
|
|
y = when {
|
|
y < rect.top -> 0f
|
|
y > rect.bottom -> height
|
|
else -> y - rect.top
|
|
}
|
|
result[0] = 1f / width * x
|
|
result[1] = 1f - 1f / height * y
|
|
return result
|
|
}
|
|
|
|
private fun pointToHue(yArg: Float): Float {
|
|
var y = yArg
|
|
val rect = hueRect
|
|
val height = rect!!.height().toFloat()
|
|
y = when {
|
|
y < rect.top -> 0f
|
|
y > rect.bottom -> height
|
|
else -> y - rect.top
|
|
}
|
|
return 360f - y * 360f / height
|
|
}
|
|
|
|
private fun pointToAlpha(xArg: Int): Int {
|
|
var x = xArg
|
|
val rect = alphaRect
|
|
val width = rect!!.width()
|
|
x = when {
|
|
x < rect.left -> 0
|
|
x > rect.right -> width
|
|
else -> x - rect.left
|
|
}
|
|
return 0xff - x * 0xff / width
|
|
}
|
|
|
|
@SuppressLint("ClickableViewAccessibility")
|
|
override fun onTouchEvent(event: MotionEvent): Boolean {
|
|
try {
|
|
this.parent.requestDisallowInterceptTouchEvent(true)
|
|
} catch (ignored: Throwable) {
|
|
}
|
|
var update = false
|
|
when (event.action) {
|
|
MotionEvent.ACTION_DOWN -> {
|
|
startTouchPoint = Point(event.x.toInt(), event.y.toInt())
|
|
update = moveTrackersIfNeeded(event)
|
|
}
|
|
MotionEvent.ACTION_MOVE -> update = moveTrackersIfNeeded(event)
|
|
MotionEvent.ACTION_UP -> {
|
|
startTouchPoint = null
|
|
update = moveTrackersIfNeeded(event)
|
|
}
|
|
}
|
|
if (update) {
|
|
onColorChangedListener?.onColorChanged(
|
|
Color.HSVToColor(
|
|
alpha,
|
|
floatArrayOf(hue, sat, bri)
|
|
)
|
|
)
|
|
invalidate()
|
|
return true
|
|
}
|
|
return super.onTouchEvent(event)
|
|
}
|
|
|
|
private fun moveTrackersIfNeeded(event: MotionEvent): Boolean {
|
|
val startTouchPoint = this.startTouchPoint ?: return false
|
|
val startX = startTouchPoint.x
|
|
val startY = startTouchPoint.y
|
|
return when {
|
|
hueRect?.contains(startX, startY) == true -> {
|
|
hue = pointToHue(event.y)
|
|
true
|
|
}
|
|
satValRect?.contains(startX, startY) == true -> {
|
|
val result = pointToSatVal(event.x, event.y)
|
|
sat = result[0]
|
|
bri = result[1]
|
|
true
|
|
}
|
|
alphaRect?.contains(startX, startY) == true -> {
|
|
alpha = pointToAlpha(event.x.toInt())
|
|
true
|
|
}
|
|
else -> false
|
|
}
|
|
}
|
|
|
|
override fun onMeasure(widthMeasureSpec: Int, heightMeasureSpec: Int) {
|
|
val finalWidth: Int
|
|
val finalHeight: Int
|
|
val widthMode = MeasureSpec.getMode(widthMeasureSpec)
|
|
val heightMode = MeasureSpec.getMode(heightMeasureSpec)
|
|
val widthAllowed = MeasureSpec.getSize(widthMeasureSpec) - paddingLeft - paddingRight
|
|
val heightAllowed = MeasureSpec.getSize(heightMeasureSpec) - paddingBottom - paddingTop
|
|
if (widthMode == MeasureSpec.EXACTLY || heightMode == MeasureSpec.EXACTLY) {
|
|
//A exact value has been set in either direction, we need to stay within this size.
|
|
if (widthMode == MeasureSpec.EXACTLY && heightMode != MeasureSpec.EXACTLY) {
|
|
//The with has been specified exactly, we need to adopt the height to fit.
|
|
var h = widthAllowed - panelSpacingPx - huePanelWidthPx
|
|
if (showAlphaPanel) {
|
|
h += panelSpacingPx + alphaPanelHeightPx
|
|
}
|
|
|
|
//We can't fit the view in this container, set the size to whatever was allowed.
|
|
finalHeight = min(h, heightAllowed)
|
|
finalWidth = widthAllowed
|
|
} else if (widthMode != MeasureSpec.EXACTLY) {
|
|
//The height has been specified exactly, we need to stay within this height and adopt the width.
|
|
var w = heightAllowed + panelSpacingPx + huePanelWidthPx
|
|
if (showAlphaPanel) {
|
|
w -= panelSpacingPx + alphaPanelHeightPx
|
|
}
|
|
|
|
//we can't fit within this container, set the size to whatever was allowed.
|
|
finalWidth = min(w, widthAllowed)
|
|
finalHeight = heightAllowed
|
|
} else {
|
|
//If we get here the dev has set the width and height to exact sizes. For example match_parent or 300dp.
|
|
//This will mean that the sat/val panel will not be square but it doesn't matter. It will work anyway.
|
|
//In all other senarios our goal is to make that panel square.
|
|
|
|
//We set the sizes to exactly what we were told.
|
|
finalWidth = widthAllowed
|
|
finalHeight = heightAllowed
|
|
}
|
|
} else {
|
|
//If no exact size has been set we try to make our view as big as possible
|
|
//within the allowed space.
|
|
|
|
//Calculate the needed width to layout using max allowed height.
|
|
var widthNeeded = heightAllowed + panelSpacingPx + huePanelWidthPx
|
|
|
|
//Calculate the needed height to layout using max allowed width.
|
|
var heightNeeded = widthAllowed - panelSpacingPx - huePanelWidthPx
|
|
if (showAlphaPanel) {
|
|
widthNeeded -= panelSpacingPx + alphaPanelHeightPx
|
|
heightNeeded += panelSpacingPx + alphaPanelHeightPx
|
|
}
|
|
val widthOk = widthNeeded <= widthAllowed
|
|
val heightOk = heightNeeded <= heightAllowed
|
|
when {
|
|
widthOk && heightOk -> {
|
|
finalWidth = widthAllowed
|
|
finalHeight = heightNeeded
|
|
}
|
|
widthOk -> {
|
|
finalHeight = heightAllowed
|
|
finalWidth = widthNeeded
|
|
}
|
|
heightOk -> {
|
|
finalHeight = heightNeeded
|
|
finalWidth = widthAllowed
|
|
}
|
|
else -> {
|
|
finalHeight = heightAllowed
|
|
finalWidth = widthAllowed
|
|
}
|
|
}
|
|
}
|
|
setMeasuredDimension(
|
|
finalWidth + paddingLeft + paddingRight,
|
|
finalHeight + paddingTop + paddingBottom
|
|
)
|
|
}
|
|
|
|
override fun getPaddingTop(): Int =
|
|
max(super.getPaddingTop(), mRequiredPadding)
|
|
|
|
override fun getPaddingBottom(): Int =
|
|
max(super.getPaddingBottom(), mRequiredPadding)
|
|
|
|
override fun getPaddingLeft(): Int =
|
|
max(super.getPaddingLeft(), mRequiredPadding)
|
|
|
|
override fun getPaddingRight(): Int =
|
|
max(super.getPaddingRight(), mRequiredPadding)
|
|
|
|
override fun onSizeChanged(w: Int, h: Int, oldw: Int, oldh: Int) {
|
|
super.onSizeChanged(w, h, oldw, oldh)
|
|
val drawingRect = Rect().also { this.drawingRect = it }
|
|
drawingRect.left = paddingLeft
|
|
drawingRect.right = w - paddingRight
|
|
drawingRect.top = paddingTop
|
|
drawingRect.bottom = h - paddingBottom
|
|
|
|
//The need to be recreated because they depend on the size of the view.
|
|
valShader = null
|
|
satShader = null
|
|
alphaShader = null
|
|
|
|
// Clear those bitmap caches since the size may have changed.
|
|
satValBackgroundCache = null
|
|
hueBackgroundCache = null
|
|
setUpSatValRect()
|
|
setUpHueRect()
|
|
setUpAlphaRect()
|
|
}
|
|
|
|
private fun setUpSatValRect() {
|
|
//Calculate the size for the big color rectangle.
|
|
val dRect = drawingRect!!
|
|
val left = dRect.left + BORDER_WIDTH_PX
|
|
val top = dRect.top + BORDER_WIDTH_PX
|
|
var bottom = dRect.bottom - BORDER_WIDTH_PX
|
|
val right = dRect.right - BORDER_WIDTH_PX - panelSpacingPx - huePanelWidthPx
|
|
if (showAlphaPanel) {
|
|
bottom -= alphaPanelHeightPx + panelSpacingPx
|
|
}
|
|
satValRect = Rect(left, top, right, bottom)
|
|
}
|
|
|
|
private fun setUpHueRect() {
|
|
//Calculate the size for the hue slider on the left.
|
|
val dRect = drawingRect!!
|
|
val left = dRect.right - huePanelWidthPx + BORDER_WIDTH_PX
|
|
val top = dRect.top + BORDER_WIDTH_PX
|
|
val bottom = dRect.bottom - BORDER_WIDTH_PX -
|
|
if (showAlphaPanel) panelSpacingPx + alphaPanelHeightPx else 0
|
|
val right = dRect.right - BORDER_WIDTH_PX
|
|
hueRect = Rect(left, top, right, bottom)
|
|
}
|
|
|
|
private fun setUpAlphaRect() {
|
|
if (!showAlphaPanel) return
|
|
|
|
val dRect = drawingRect ?: return
|
|
|
|
val left = dRect.left + BORDER_WIDTH_PX
|
|
val top = dRect.bottom - alphaPanelHeightPx + BORDER_WIDTH_PX
|
|
val bottom = dRect.bottom - BORDER_WIDTH_PX
|
|
val right = dRect.right - BORDER_WIDTH_PX
|
|
|
|
val alphaRect = Rect(left, top, right, bottom)
|
|
.also { this.alphaRect = it }
|
|
|
|
alphaPatternDrawable = AlphaPatternDrawable(DrawingUtils.dpToPx(context, 4f))
|
|
.apply {
|
|
setBounds(
|
|
alphaRect.left,
|
|
alphaRect.top,
|
|
alphaRect.right,
|
|
alphaRect.bottom
|
|
)
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Set the color this view should show.
|
|
*
|
|
* @param color The color that should be selected. #argb
|
|
* @param callback If you want to get a callback to your OnColorChangedListener.
|
|
*/
|
|
fun setColor(color: Int, callback: Boolean) {
|
|
val alpha = Color.alpha(color)
|
|
val red = Color.red(color)
|
|
val blue = Color.blue(color)
|
|
val green = Color.green(color)
|
|
val hsv = FloatArray(3)
|
|
Color.RGBToHSV(red, green, blue, hsv)
|
|
this.alpha = alpha
|
|
hue = hsv[0]
|
|
sat = hsv[1]
|
|
bri = hsv[2]
|
|
if (callback) {
|
|
onColorChangedListener
|
|
?.onColorChanged(Color.HSVToColor(this.alpha, floatArrayOf(hue, sat, bri)))
|
|
}
|
|
invalidate()
|
|
}
|
|
|
|
/**
|
|
* Set if the user is allowed to adjust the alpha panel. Default is false.
|
|
* If it is set to false no alpha will be set.
|
|
*
|
|
* @param visible `true` to show the alpha slider
|
|
*/
|
|
fun setAlphaSliderVisible(visible: Boolean) {
|
|
if (showAlphaPanel != visible) {
|
|
showAlphaPanel = visible
|
|
|
|
/*
|
|
* Force recreation.
|
|
*/
|
|
valShader = null
|
|
satShader = null
|
|
alphaShader = null
|
|
hueBackgroundCache = null
|
|
satValBackgroundCache = null
|
|
requestLayout()
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Set the text that should be shown in the
|
|
* alpha slider. Set to null to disable text.
|
|
*
|
|
* @param res string resource id.
|
|
*/
|
|
fun setAlphaSliderText(res: Int) {
|
|
alphaSliderText = context.getString(res)
|
|
}
|
|
} |