317 lines
11 KiB
Java
317 lines
11 KiB
Java
/*
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* Copyright (C) 2017 Jared Rummler
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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.jaredrummler.android.colorpicker;
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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.BitmapShader;
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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.Rect;
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import android.graphics.RectF;
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import android.graphics.Shader;
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import android.graphics.drawable.BitmapDrawable;
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import android.graphics.drawable.Drawable;
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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.Gravity;
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import android.view.View;
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import android.widget.Toast;
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import androidx.annotation.ColorInt;
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import androidx.core.view.GravityCompat;
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import androidx.core.view.ViewCompat;
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import java.util.Locale;
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/**
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* This class draws a panel which which will be filled with a color which can be set. It can be used to show the
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* currently selected color which you will get from the {@link ColorPickerView}.
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*/
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public class ColorPanelView extends View {
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private final static int DEFAULT_BORDER_COLOR = 0xFF6E6E6E;
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private Drawable alphaPattern;
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private Paint borderPaint;
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private Paint colorPaint;
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private Paint alphaPaint;
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private Paint originalPaint;
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private Rect drawingRect;
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private Rect colorRect;
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private RectF centerRect = new RectF();
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private boolean showOldColor;
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/* The width in pixels of the border surrounding the color panel. */
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private int borderWidthPx;
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private int borderColor = DEFAULT_BORDER_COLOR;
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private int color = Color.BLACK;
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private int shape;
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public ColorPanelView(Context context) {
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this(context, null);
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}
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public ColorPanelView(Context context, AttributeSet attrs) {
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this(context, attrs, 0);
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}
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public ColorPanelView(Context context, AttributeSet attrs, int defStyle) {
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super(context, attrs, defStyle);
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init(context, attrs);
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}
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@Override
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public Parcelable onSaveInstanceState() {
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Bundle state = new Bundle();
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state.putParcelable("instanceState", super.onSaveInstanceState());
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state.putInt("color", color);
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return state;
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}
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@Override
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public void onRestoreInstanceState(Parcelable state) {
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if (state instanceof Bundle) {
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Bundle bundle = (Bundle) state;
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color = bundle.getInt("color");
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state = bundle.getParcelable("instanceState");
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}
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super.onRestoreInstanceState(state);
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}
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private void init(Context context, AttributeSet attrs) {
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TypedArray a = getContext().obtainStyledAttributes(attrs, R.styleable.ColorPanelView);
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shape = a.getInt(R.styleable.ColorPanelView_cpv_colorShape, ColorShape.CIRCLE);
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showOldColor = a.getBoolean(R.styleable.ColorPanelView_cpv_showOldColor, false);
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if (showOldColor && shape != ColorShape.CIRCLE) {
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throw new IllegalStateException("Color preview is only available in circle mode");
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}
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borderColor = a.getColor(R.styleable.ColorPanelView_cpv_borderColor, DEFAULT_BORDER_COLOR);
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a.recycle();
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if (borderColor == DEFAULT_BORDER_COLOR) {
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// If no specific border color has been set we take the default secondary text color as border/slider color.
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// Thus it will adopt to theme changes automatically.
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final TypedValue value = new TypedValue();
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TypedArray typedArray =
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context.obtainStyledAttributes(value.data, new int[]{android.R.attr.textColorSecondary});
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borderColor = typedArray.getColor(0, borderColor);
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typedArray.recycle();
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}
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borderWidthPx = DrawingUtils.dpToPx(context, 1);
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borderPaint = new Paint();
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borderPaint.setAntiAlias(true);
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colorPaint = new Paint();
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colorPaint.setAntiAlias(true);
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if (showOldColor) {
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originalPaint = new Paint();
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}
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if (shape == ColorShape.CIRCLE) {
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Bitmap bitmap = ((BitmapDrawable) context.getResources().getDrawable(R.drawable.cpv_alpha)).getBitmap();
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alphaPaint = new Paint();
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alphaPaint.setAntiAlias(true);
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BitmapShader shader = new BitmapShader(bitmap, Shader.TileMode.REPEAT, Shader.TileMode.REPEAT);
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alphaPaint.setShader(shader);
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}
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}
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@Override
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protected void onDraw(Canvas canvas) {
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borderPaint.setColor(borderColor);
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colorPaint.setColor(color);
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if (shape == ColorShape.SQUARE) {
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if (borderWidthPx > 0) {
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canvas.drawRect(drawingRect, borderPaint);
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}
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if (alphaPattern != null) {
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alphaPattern.draw(canvas);
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}
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canvas.drawRect(colorRect, colorPaint);
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} else if (shape == ColorShape.CIRCLE) {
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final int outerRadius = getMeasuredWidth() / 2;
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if (borderWidthPx > 0) {
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canvas.drawCircle(getMeasuredWidth() / 2, getMeasuredHeight() / 2, outerRadius, borderPaint);
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}
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if (Color.alpha(color) < 255) {
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canvas.drawCircle(getMeasuredWidth() / 2, getMeasuredHeight() / 2, outerRadius - borderWidthPx, alphaPaint);
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}
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if (showOldColor) {
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canvas.drawArc(centerRect, 90, 180, true, originalPaint);
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canvas.drawArc(centerRect, 270, 180, true, colorPaint);
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} else {
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canvas.drawCircle(getMeasuredWidth() / 2, getMeasuredHeight() / 2, outerRadius - borderWidthPx, colorPaint);
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}
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}
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}
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@Override
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protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
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if (shape == ColorShape.SQUARE) {
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int width = MeasureSpec.getSize(widthMeasureSpec);
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int height = MeasureSpec.getSize(heightMeasureSpec);
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setMeasuredDimension(width, height);
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} else if (shape == ColorShape.CIRCLE) {
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super.onMeasure(widthMeasureSpec, widthMeasureSpec);
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setMeasuredDimension(getMeasuredWidth(), getMeasuredWidth());
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} else {
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super.onMeasure(widthMeasureSpec, heightMeasureSpec);
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}
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}
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@Override
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protected void onSizeChanged(int w, int h, int oldw, int oldh) {
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super.onSizeChanged(w, h, oldw, oldh);
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if (shape == ColorShape.SQUARE || showOldColor) {
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drawingRect = new Rect();
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drawingRect.left = getPaddingLeft();
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drawingRect.right = w - getPaddingRight();
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drawingRect.top = getPaddingTop();
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drawingRect.bottom = h - getPaddingBottom();
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if (showOldColor) {
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setUpCenterRect();
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} else {
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setUpColorRect();
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}
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}
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}
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private void setUpCenterRect() {
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final Rect dRect = drawingRect;
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int left = dRect.left + borderWidthPx;
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int top = dRect.top + borderWidthPx;
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int bottom = dRect.bottom - borderWidthPx;
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int right = dRect.right - borderWidthPx;
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centerRect = new RectF(left, top, right, bottom);
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}
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private void setUpColorRect() {
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final Rect dRect = drawingRect;
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int left = dRect.left + borderWidthPx;
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int top = dRect.top + borderWidthPx;
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int bottom = dRect.bottom - borderWidthPx;
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int right = dRect.right - borderWidthPx;
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colorRect = new Rect(left, top, right, bottom);
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alphaPattern = new AlphaPatternDrawable(DrawingUtils.dpToPx(getContext(), 4));
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alphaPattern.setBounds(Math.round(colorRect.left), Math.round(colorRect.top), Math.round(colorRect.right),
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Math.round(colorRect.bottom));
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}
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/**
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* Get the color currently show by this view.
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*
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* @return the color value
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*/
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public int getColor() {
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return color;
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}
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/**
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* Set the color that should be shown by this view.
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*
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* @param color the color value
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*/
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public void setColor(int color) {
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this.color = color;
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invalidate();
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}
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/**
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* Set the original color. This is only used for previewing colors.
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*
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* @param color The original color
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*/
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public void setOriginalColor(@ColorInt int color) {
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if (originalPaint != null) {
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originalPaint.setColor(color);
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}
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}
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/**
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* @return the color of the border surrounding the panel.
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*/
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public int getBorderColor() {
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return borderColor;
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}
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/**
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* Set the color of the border surrounding the panel.
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*
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* @param color the color value
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*/
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public void setBorderColor(int color) {
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borderColor = color;
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invalidate();
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}
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/**
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* Get the shape
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*
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* @return Either {@link ColorShape#SQUARE} or {@link ColorShape#CIRCLE}.
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*/
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@ColorShape
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public int getShape() {
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return shape;
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}
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/**
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* Set the shape.
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*
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* @param shape Either {@link ColorShape#SQUARE} or {@link ColorShape#CIRCLE}.
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*/
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public void setShape(@ColorShape int shape) {
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this.shape = shape;
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invalidate();
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}
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/**
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* Show a toast message with the hex color code below the view.
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*/
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public void showHint() {
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final int[] screenPos = new int[2];
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final Rect displayFrame = new Rect();
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getLocationOnScreen(screenPos);
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getWindowVisibleDisplayFrame(displayFrame);
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final Context context = getContext();
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final int width = getWidth();
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final int height = getHeight();
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final int midy = screenPos[1] + height / 2;
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int referenceX = screenPos[0] + width / 2;
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if (ViewCompat.getLayoutDirection(this) == ViewCompat.LAYOUT_DIRECTION_LTR) {
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final int screenWidth = context.getResources().getDisplayMetrics().widthPixels;
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referenceX = screenWidth - referenceX; // mirror
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}
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StringBuilder hint = new StringBuilder("#");
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if (Color.alpha(color) != 255) {
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hint.append(Integer.toHexString(color).toUpperCase(Locale.ENGLISH));
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} else {
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hint.append(String.format("%06X", 0xFFFFFF & color).toUpperCase(Locale.ENGLISH));
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}
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Toast cheatSheet = Toast.makeText(context, hint.toString(), Toast.LENGTH_SHORT);
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if (midy < displayFrame.height()) {
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// Show along the top; follow action buttons
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cheatSheet.setGravity(Gravity.TOP | GravityCompat.END, referenceX, screenPos[1] + height - displayFrame.top);
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} else {
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// Show along the bottom center
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cheatSheet.setGravity(Gravity.BOTTOM | Gravity.CENTER_HORIZONTAL, 0, height);
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}
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cheatSheet.show();
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}
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}
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