| /* |
| * Copyright (C) 2013 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package com.android.gallery3d.filtershow.colorpicker; |
| |
| import android.content.Context; |
| import android.graphics.Canvas; |
| import android.graphics.Color; |
| import android.graphics.LinearGradient; |
| import android.graphics.Paint; |
| import android.graphics.RadialGradient; |
| import android.graphics.Shader; |
| import android.util.AttributeSet; |
| import android.util.DisplayMetrics; |
| import android.view.MotionEvent; |
| import android.view.View; |
| |
| import com.android.gallery3d.R; |
| |
| import java.util.ArrayList; |
| |
| public class ColorValueView extends View implements ColorListener { |
| |
| private float mRadius; |
| private float mWidth; |
| private Paint mBarPaint1; |
| private Paint mLinePaint1; |
| private Paint mLinePaint2; |
| private float mHeight; |
| private int mBgcolor = 0; |
| private Paint mDotPaint; |
| private float dotRadus; |
| private float mBorder; |
| |
| private float[] mHSVO = new float[4]; |
| private int mSliderColor; |
| private float mDotX; |
| private float mDotY = mBorder; |
| private final static float DOT_SIZE = ColorRectView.DOT_SIZE; |
| private final static float BORDER_SIZE = ColorRectView.DOT_SIZE; |
| |
| public ColorValueView(Context ctx, AttributeSet attrs) { |
| super(ctx, attrs); |
| DisplayMetrics metrics = ctx.getResources().getDisplayMetrics(); |
| float mDpToPix = metrics.density; |
| dotRadus = DOT_SIZE * mDpToPix; |
| mBorder = BORDER_SIZE * mDpToPix; |
| |
| mBarPaint1 = new Paint(); |
| |
| mDotPaint = new Paint(); |
| |
| mDotPaint.setStyle(Paint.Style.FILL); |
| mDotPaint.setColor(ctx.getResources().getColor(R.color.slider_dot_color)); |
| |
| mBarPaint1.setStyle(Paint.Style.FILL); |
| |
| mLinePaint1 = new Paint(); |
| mLinePaint1.setColor(Color.GRAY); |
| mLinePaint2 = new Paint(); |
| mSliderColor = ctx.getResources().getColor(R.color.slider_line_color); |
| mLinePaint2.setColor(mSliderColor); |
| mLinePaint2.setStrokeWidth(4); |
| } |
| |
| public boolean onDown(MotionEvent e) { |
| return true; |
| } |
| |
| public boolean onTouchEvent(MotionEvent event) { |
| float ox = mDotX; |
| float oy = mDotY; |
| |
| float x = event.getX(); |
| float y = event.getY(); |
| |
| mDotY = y; |
| |
| if (mDotY < mBorder) { |
| mDotY = mBorder; |
| } |
| |
| if (mDotY > mHeight - mBorder) { |
| mDotY = mHeight - mBorder; |
| } |
| mHSVO[2] = (mDotY - mBorder) / (mHeight - mBorder * 2); |
| notifyColorListeners(mHSVO); |
| setupButton(); |
| invalidate((int) (ox - dotRadus), (int) (oy - dotRadus), (int) (ox + dotRadus), |
| (int) (oy + dotRadus)); |
| invalidate((int) (mDotX - dotRadus), (int) (mDotY - dotRadus), (int) (mDotX + dotRadus), |
| (int) (mDotY + dotRadus)); |
| |
| return true; |
| } |
| |
| private void setupButton() { |
| float pos = mHSVO[2] * (mHeight - mBorder * 2); |
| mDotY = pos + mBorder; |
| |
| int[] colors3 = new int[] { |
| mSliderColor, mSliderColor, 0x66000000, 0 }; |
| RadialGradient g = new RadialGradient(mDotX, mDotY, dotRadus, colors3, new float[] { |
| 0, .3f, .31f, 1 }, Shader.TileMode.CLAMP); |
| mDotPaint.setShader(g); |
| } |
| |
| @Override |
| protected void onSizeChanged(int w, int h, int oldw, int oldh) { |
| mWidth = w; |
| mHeight = h; |
| mDotX = mWidth / 2; |
| updatePaint(); |
| setupButton(); |
| } |
| |
| private void updatePaint() { |
| float[] hsv = new float[] { |
| mHSVO[0], mHSVO[1], 0f }; |
| int color1 = Color.HSVToColor(hsv); |
| hsv[2] = 1; |
| int color2 = Color.HSVToColor(hsv); |
| |
| Shader sg = new LinearGradient(mBorder, mBorder, mBorder, mHeight - mBorder, color1, color2, |
| Shader.TileMode.CLAMP); |
| mBarPaint1.setShader(sg); |
| } |
| |
| @Override |
| protected void onDraw(Canvas canvas) { |
| super.onDraw(canvas); |
| canvas.drawColor(mBgcolor); |
| canvas.drawRect(mBorder, mBorder, mWidth - mBorder, mHeight - mBorder, mBarPaint1); |
| canvas.drawLine(mDotX, mDotY, mDotX, mHeight - mBorder, mLinePaint2); |
| canvas.drawLine(mDotX, mBorder, mDotX, mDotY, mLinePaint1); |
| if (mDotX != Float.NaN) { |
| canvas.drawCircle(mDotX, mDotY, dotRadus, mDotPaint); |
| } |
| } |
| |
| @Override |
| public void setColor(float[] hsvo) { |
| System.arraycopy(hsvo, 0, mHSVO, 0, mHSVO.length); |
| |
| float oy = mDotY; |
| updatePaint(); |
| setupButton(); |
| invalidate(); |
| |
| } |
| |
| ArrayList<ColorListener> mColorListeners = new ArrayList<ColorListener>(); |
| |
| public void notifyColorListeners(float[] hsv) { |
| for (ColorListener l : mColorListeners) { |
| l.setColor(hsv); |
| } |
| } |
| |
| public void addColorListener(ColorListener l) { |
| mColorListeners.add(l); |
| } |
| |
| public void removeColorListener(ColorListener l) { |
| mColorListeners.remove(l); |
| } |
| } |