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/*
* 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);
}
}
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