/*
* Copyright (C) 2007 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.
*
* Adapted from the Android API samples
*/
package ac.robinson.mediatablet.view;
import ac.robinson.mediatablet.R;
import android.annotation.SuppressLint;
import android.app.Dialog;
import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.LightingColorFilter;
import android.graphics.Paint;
import android.graphics.RectF;
import android.graphics.Shader;
import android.graphics.SweepGradient;
import android.os.Bundle;
import android.view.Gravity;
import android.view.MotionEvent;
import android.view.SoundEffectConstants;
import android.view.View;
import android.widget.LinearLayout;
import android.widget.LinearLayout.LayoutParams;
public class ColorPickerDialog extends Dialog {
public interface OnColorChangedListener {
void colorChanged(int color);
}
private OnColorChangedListener mListener;
private int mInitialColor;
private static class ColorPickerView extends View {
private Paint mPaint;
private Paint mCenterPaint;
private final int[] mColors;
private OnColorChangedListener mListener;
private final Bitmap mHomesteadIcon = BitmapFactory.decodeResource(getResources(), R.drawable.ic_homestead);
private final Bitmap mHomesteadSelectedIcon = BitmapFactory.decodeResource(getResources(),
R.drawable.ic_homestead_selected);
private int mHomesteadHalfIconWidth, mHomesteadHalfIconHeight;
private RectF drawRect;
ColorPickerView(Context c, OnColorChangedListener l, int color) {
super(c);
mListener = l;
mColors = new int[] { 0xFFFFFFFF, 0xFFFF0000, 0xFFFF00FF, 0xFF0000FF, 0xFF00FFFF, 0xFF00FF00, 0xFFFFFF00,
0xFFFFFFFF };
Shader s = new SweepGradient(0, 0, mColors, null);
mPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
mPaint.setShader(s);
mPaint.setStyle(Paint.Style.STROKE);
mPaint.setStrokeWidth(80);
mCenterPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
mCenterPaint.setColor(color);
mCenterPaint.setStrokeWidth(5);
mHomesteadHalfIconWidth = mHomesteadIcon.getWidth() / 2;
mHomesteadHalfIconHeight = mHomesteadIcon.getHeight() / 2;
drawRect = new RectF();
}
private boolean mTrackingCenter;
private boolean mHighlightCenter;
// no way to reuse LightingColorFilter here
@SuppressLint("DrawAllocation")
@Override
protected void onDraw(Canvas canvas) {
float r = CENTER_X - mPaint.getStrokeWidth() * 0.5f;
drawRect.left = -r;
drawRect.top = -r;
drawRect.right = r;
drawRect.bottom = r;
canvas.translate(CENTER_X, CENTER_X);
canvas.drawOval(drawRect, mPaint);
// canvas.drawCircle(0, 0, CENTER_RADIUS, mCenterPaint);
if (mTrackingCenter) {
// int c = mCenterPaint.getColor();
// mCenterPaint.setStyle(Paint.Style.STROKE);
//
if (mHighlightCenter) {
mCenterPaint.setAlpha(0xFF);
} else {
mCenterPaint.setAlpha(0x80);
}
// canvas.drawCircle(0, 0,
// CENTER_RADIUS + mCenterPaint.getStrokeWidth(),
// mCenterPaint);
//
// mCenterPaint.setStyle(Paint.Style.FILL);
// mCenterPaint.setColor(c);
canvas.drawBitmap(mHomesteadSelectedIcon, -mHomesteadHalfIconWidth, -mHomesteadHalfIconHeight,
mCenterPaint);
}
mCenterPaint.setColorFilter(new LightingColorFilter(mCenterPaint.getColor(), 1));
canvas.drawBitmap(mHomesteadIcon, -mHomesteadHalfIconWidth, -mHomesteadHalfIconHeight, mCenterPaint);
mCenterPaint.setColorFilter(null);
}
@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
setMeasuredDimension(CENTER_X * 2, CENTER_Y * 2);
}
private static final int CENTER_X = 200;
private static final int CENTER_Y = 200;
private static final int CENTER_RADIUS = 50;
// private int floatToByte(float x) {
// int n = Math.round(x);
// return n;
// }
// private int pinToByte(int n) {
// if (n < 0) {
// n = 0;
// } else if (n > 255) {
// n = 255;
// }
// return n;
// }
private int ave(int s, int d, float p) {
return s + Math.round(p * (d - s));
}
private int interpColor(int colors[], float unit) {
if (unit <= 0) {
return colors[0];
}
if (unit >= 1) {
return colors[colors.length - 1];
}
float p = unit * (colors.length - 1);
int i = (int) p;
p -= i;
// now p is just the fractional part [0...1) and i is the index
int c0 = colors[i];
int c1 = colors[i + 1];
int a = ave(Color.alpha(c0), Color.alpha(c1), p);
int r = ave(Color.red(c0), Color.red(c1), p);
int g = ave(Color.green(c0), Color.green(c1), p);
int b = ave(Color.blue(c0), Color.blue(c1), p);
return Color.argb(a, r, g, b);
}
// private int rotateColor(int color, float rad) {
// float deg = rad * 180 / 3.1415927f;
// int r = Color.red(color);
// int g = Color.green(color);
// int b = Color.blue(color);
//
// ColorMatrix cm = new ColorMatrix();
// ColorMatrix tmp = new ColorMatrix();
//
// cm.setRGB2YUV();
// tmp.setRotate(0, deg);
// cm.postConcat(tmp);
// tmp.setYUV2RGB();
// cm.postConcat(tmp);
//
// final float[] a = cm.getArray();
//
// int ir = floatToByte(a[0] * r + a[1] * g + a[2] * b);
// int ig = floatToByte(a[5] * r + a[6] * g + a[7] * b);
// int ib = floatToByte(a[10] * r + a[11] * g + a[12] * b);
//
// return Color.argb(Color.alpha(color), pinToByte(ir),
// pinToByte(ig), pinToByte(ib));
// }
private static final float PI = 3.1415926f;
@Override
public boolean onTouchEvent(MotionEvent event) {
float x = event.getX() - CENTER_X;
float y = event.getY() - CENTER_Y;
boolean inCenter = Math.sqrt(x * x + y * y) <= CENTER_RADIUS;
switch (event.getAction()) {
case MotionEvent.ACTION_DOWN:
mTrackingCenter = inCenter;
if (inCenter) {
mHighlightCenter = true;
invalidate();
break;
}
case MotionEvent.ACTION_MOVE:
if (mTrackingCenter) {
if (mHighlightCenter != inCenter) {
mHighlightCenter = inCenter;
invalidate();
}
} else {
float angle = (float) Math.atan2(y, x);
// need to turn angle [-PI ... PI] into unit [0....1]
float unit = angle / (2 * PI);
if (unit < 0) {
unit += 1;
}
mCenterPaint.setColor(interpColor(mColors, unit));
invalidate();
}
break;
case MotionEvent.ACTION_UP:
playSoundEffect(SoundEffectConstants.CLICK); // play the default button click (respects prefs)
if (mTrackingCenter) {
if (inCenter) {
mListener.colorChanged(mCenterPaint.getColor());
}
mTrackingCenter = false; // so we draw w/o halo
invalidate();
}
break;
}
return true;
}
}
public ColorPickerDialog(Context context, OnColorChangedListener listener, int initialColor) {
super(context);
mListener = listener;
mInitialColor = initialColor;
}
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
OnColorChangedListener l = new OnColorChangedListener() {
public void colorChanged(int color) {
mListener.colorChanged(color);
dismiss();
}
};
LinearLayout mainPanel = new LinearLayout(getContext());
mainPanel.setLayoutParams(new LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT));
mainPanel.setOrientation(LinearLayout.VERTICAL);
mainPanel.setPadding(0, 20, 0, 20);
mainPanel.setGravity(Gravity.CENTER);
mainPanel.addView(new ColorPickerView(getContext(), l, mInitialColor));
// Button cancelButton = new Button(getContext());
// cancelButton.setText(getContext().getString(R.string.button_cancel));
// cancelButton.setOnClickListener(new View.OnClickListener() {
// @Override
// public void onClick(View v) {
// dismiss();
// }
// });
// LayoutParams layoutParams = new LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT);
// layoutParams.setMargins(0, 40, 0, 0);
// mainPanel.addView(cancelButton, layoutParams);
setContentView(mainPanel);
setTitle(getContext().getString(R.string.title_change_homestead_colour));
}
}