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Diffstat (limited to 'app/src/main/java/org/connectbot/util/UberColorPickerDialog.java')
| -rw-r--r-- | app/src/main/java/org/connectbot/util/UberColorPickerDialog.java | 982 |
1 files changed, 982 insertions, 0 deletions
diff --git a/app/src/main/java/org/connectbot/util/UberColorPickerDialog.java b/app/src/main/java/org/connectbot/util/UberColorPickerDialog.java new file mode 100644 index 0000000..2c01b30 --- /dev/null +++ b/app/src/main/java/org/connectbot/util/UberColorPickerDialog.java @@ -0,0 +1,982 @@ +/* + * 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. + */ + +/* + * 090408 + * Keith Wiley + * kwiley@keithwiley.com + * http://keithwiley.com + * + * UberColorPickerDialog v1.1 + * + * This color picker was implemented as a (significant) extension of the + * ColorPickerDialog class provided in the Android API Demos. You are free + * to drop it unchanged into your own projects or to modify it as you see + * fit. I would appreciate it if this comment block were let intact, + * merely for credit's sake. + * + * Enjoy! + */ + +package org.connectbot.util; + +import android.app.Dialog; +import android.content.Context; +import android.graphics.Bitmap; +import android.graphics.Canvas; +import android.graphics.Color; +import android.graphics.ColorMatrix; +import android.graphics.ComposeShader; +import android.graphics.Paint; +import android.graphics.PorterDuff; +import android.graphics.PorterDuffXfermode; +import android.graphics.RadialGradient; +import android.graphics.Rect; +import android.graphics.RectF; +import android.graphics.Shader; +import android.graphics.SweepGradient; +import android.graphics.drawable.GradientDrawable; +import android.graphics.drawable.GradientDrawable.Orientation; +import android.os.Bundle; +import android.util.DisplayMetrics; +import android.view.MotionEvent; +import android.view.View; + +/** + * UberColorPickerDialog is a seriously enhanced version of the UberColorPickerDialog + * class provided in the Android API Demos.<p> + * + * NOTE (from Kenny Root): This is a VERY slimmed down version custom for ConnectBot. + * Visit Keith's site for the full version at the URL listed in the author line.<p> + * + * @author Keith Wiley, kwiley@keithwiley.com, http://keithwiley.com + */ +public class UberColorPickerDialog extends Dialog { + private final OnColorChangedListener mListener; + private final int mInitialColor; + + /** + * Callback to the creator of the dialog, informing the creator of a new color and notifying that the dialog is about to dismiss. + */ + public interface OnColorChangedListener { + void colorChanged(int color); + } + + /** + * Ctor + * @param context + * @param listener + * @param initialColor + * @param showTitle If true, a title is shown across the top of the dialog. If false a toast is shown instead. + */ + public UberColorPickerDialog(Context context, + OnColorChangedListener listener, + int initialColor) { + super(context); + + mListener = listener; + mInitialColor = initialColor; + } + + /** + * Activity entry point + */ + @Override + protected void onCreate(Bundle savedInstanceState) { + super.onCreate(savedInstanceState); + OnColorChangedListener l = new OnColorChangedListener() { + public void colorChanged(int color) { + mListener.colorChanged(color); + dismiss(); + } + }; + + DisplayMetrics dm = new DisplayMetrics(); + getWindow().getWindowManager().getDefaultDisplay().getMetrics(dm); + int screenWidth = dm.widthPixels; + int screenHeight = dm.heightPixels; + + setTitle("Pick a color (try the trackball)"); + + try { + setContentView(new ColorPickerView(getContext(), l, screenWidth, screenHeight, mInitialColor)); + } + catch (Exception e) { + //There is currently only one kind of ctor exception, that where no methods are enabled. + dismiss(); //This doesn't work! The dialog is still shown (its title at least, the layout is empty from the exception being thrown). <sigh> + } + } + + /** + * ColorPickerView is the meat of this color picker (as opposed to the enclosing class). + * All the heavy lifting is done directly by this View subclass. + * <P> + * You can enable/disable whichever color chooser methods you want by modifying the ENABLED_METHODS switches. They *should* + * do all the work required to properly enable/disable methods without losing track of what goes with what and what maps to what. + * <P> + * If you add a new color chooser method, do a text search for "NEW_METHOD_WORK_NEEDED_HERE". That tag indicates all + * the locations in the code that will have to be amended in order to properly add a new color chooser method. + * I highly recommend adding new methods to the end of the list. If you want to try to reorder the list, you're on your own. + */ + private static class ColorPickerView extends View { + private static int SWATCH_WIDTH = 95; + private static final int SWATCH_HEIGHT = 60; + + private static int PALETTE_POS_X = 0; + private static int PALETTE_POS_Y = SWATCH_HEIGHT; + private static final int PALETTE_DIM = SWATCH_WIDTH * 2; + private static final int PALETTE_RADIUS = PALETTE_DIM / 2; + private static final int PALETTE_CENTER_X = PALETTE_RADIUS; + private static final int PALETTE_CENTER_Y = PALETTE_RADIUS; + + private static final int SLIDER_THICKNESS = 40; + + private static int VIEW_DIM_X = PALETTE_DIM; + private static int VIEW_DIM_Y = SWATCH_HEIGHT; + + //NEW_METHOD_WORK_NEEDED_HERE + private static final int METHOD_HS_V_PALETTE = 0; + + //NEW_METHOD_WORK_NEEDED_HERE + //Add a new entry to the list for each controller in the new method + private static final int TRACKED_NONE = -1; //No object on screen is currently being tracked + private static final int TRACK_SWATCH_OLD = 10; + private static final int TRACK_SWATCH_NEW = 11; + private static final int TRACK_HS_PALETTE = 30; + private static final int TRACK_VER_VALUE_SLIDER = 31; + + private static final int TEXT_SIZE = 12; + private static int[] TEXT_HSV_POS = new int[2]; + private static int[] TEXT_RGB_POS = new int[2]; + private static int[] TEXT_YUV_POS = new int[2]; + private static int[] TEXT_HEX_POS = new int[2]; + + private static final float PI = 3.141592653589793f; + + private int mMethod = METHOD_HS_V_PALETTE; + private int mTracking = TRACKED_NONE; //What object on screen is currently being tracked for movement + + //Zillions of persistant Paint objecs for drawing the View + + private Paint mSwatchOld, mSwatchNew; + + //NEW_METHOD_WORK_NEEDED_HERE + //Add Paints to represent the palettes of the new method's UI controllers + private Paint mOvalHueSat; + + private Bitmap mVerSliderBM; + private Canvas mVerSliderCv; + + private Bitmap[] mHorSlidersBM = new Bitmap[3]; + private Canvas[] mHorSlidersCv = new Canvas[3]; + + private Paint mValDimmer; + + //NEW_METHOD_WORK_NEEDED_HERE + //Add Paints to represent the icon for the new method + private Paint mOvalHueSatSmall; + + private Paint mPosMarker; + private Paint mText; + + private Rect mOldSwatchRect = new Rect(); + private Rect mNewSwatchRect = new Rect(); + private Rect mPaletteRect = new Rect(); + private Rect mVerSliderRect = new Rect(); + + private int[] mSpectrumColorsRev; + private int mOriginalColor = 0; //The color passed in at the beginning, which can be reverted to at any time by tapping the old swatch. + private float[] mHSV = new float[3]; + private int[] mRGB = new int[3]; + private float[] mYUV = new float[3]; + private String mHexStr = ""; + private boolean mHSVenabled = true; //Only true if an HSV method is enabled + private boolean mRGBenabled = true; //Only true if an RGB method is enabled + private boolean mYUVenabled = true; //Only true if a YUV method is enabled + private boolean mHexenabled = true; //Only true if an RGB method is enabled + private int[] mCoord = new int[3]; //For drawing slider/palette markers + private int mFocusedControl = -1; //Which control receives trackball events. + private OnColorChangedListener mListener; + + /** + * Ctor. + * @param c + * @param l + * @param width Used to determine orientation and adjust layout accordingly + * @param height Used to determine orientation and adjust layout accordingly + * @param color The initial color + * @throws Exception + */ + ColorPickerView(Context c, OnColorChangedListener l, int width, int height, int color) + throws Exception { + super(c); + + //We need to make the dialog focusable to retrieve trackball events. + setFocusable(true); + + mListener = l; + + mOriginalColor = color; + + Color.colorToHSV(color, mHSV); + + updateAllFromHSV(); + + //Setup the layout based on whether this is a portrait or landscape orientation. + if (width <= height) { //Portrait layout + SWATCH_WIDTH = (PALETTE_DIM + SLIDER_THICKNESS) / 2; + + PALETTE_POS_X = 0; + PALETTE_POS_Y = TEXT_SIZE * 4 + SWATCH_HEIGHT; + + //Set more rects, lots of rects + mOldSwatchRect.set(0, TEXT_SIZE * 4, SWATCH_WIDTH, TEXT_SIZE * 4 + SWATCH_HEIGHT); + mNewSwatchRect.set(SWATCH_WIDTH, TEXT_SIZE * 4, SWATCH_WIDTH * 2, TEXT_SIZE * 4 + SWATCH_HEIGHT); + mPaletteRect.set(0, PALETTE_POS_Y, PALETTE_DIM, PALETTE_POS_Y + PALETTE_DIM); + mVerSliderRect.set(PALETTE_DIM, PALETTE_POS_Y, PALETTE_DIM + SLIDER_THICKNESS, PALETTE_POS_Y + PALETTE_DIM); + + TEXT_HSV_POS[0] = 3; + TEXT_HSV_POS[1] = 0; + TEXT_RGB_POS[0] = TEXT_HSV_POS[0] + 50; + TEXT_RGB_POS[1] = TEXT_HSV_POS[1]; + TEXT_YUV_POS[0] = TEXT_HSV_POS[0] + 100; + TEXT_YUV_POS[1] = TEXT_HSV_POS[1]; + TEXT_HEX_POS[0] = TEXT_HSV_POS[0] + 150; + TEXT_HEX_POS[1] = TEXT_HSV_POS[1]; + + VIEW_DIM_X = PALETTE_DIM + SLIDER_THICKNESS; + VIEW_DIM_Y = SWATCH_HEIGHT + PALETTE_DIM + TEXT_SIZE * 4; + } + else { //Landscape layout + SWATCH_WIDTH = 110; + + PALETTE_POS_X = SWATCH_WIDTH; + PALETTE_POS_Y = 0; + + //Set more rects, lots of rects + mOldSwatchRect.set(0, TEXT_SIZE * 7, SWATCH_WIDTH, TEXT_SIZE * 7 + SWATCH_HEIGHT); + mNewSwatchRect.set(0, TEXT_SIZE * 7 + SWATCH_HEIGHT, SWATCH_WIDTH, TEXT_SIZE * 7 + SWATCH_HEIGHT * 2); + mPaletteRect.set(SWATCH_WIDTH, PALETTE_POS_Y, SWATCH_WIDTH + PALETTE_DIM, PALETTE_POS_Y + PALETTE_DIM); + mVerSliderRect.set(SWATCH_WIDTH + PALETTE_DIM, PALETTE_POS_Y, SWATCH_WIDTH + PALETTE_DIM + SLIDER_THICKNESS, PALETTE_POS_Y + PALETTE_DIM); + + TEXT_HSV_POS[0] = 3; + TEXT_HSV_POS[1] = 0; + TEXT_RGB_POS[0] = TEXT_HSV_POS[0]; + TEXT_RGB_POS[1] = (int)(TEXT_HSV_POS[1] + TEXT_SIZE * 3.5); + TEXT_YUV_POS[0] = TEXT_HSV_POS[0] + 50; + TEXT_YUV_POS[1] = (int)(TEXT_HSV_POS[1] + TEXT_SIZE * 3.5); + TEXT_HEX_POS[0] = TEXT_HSV_POS[0] + 50; + TEXT_HEX_POS[1] = TEXT_HSV_POS[1]; + + VIEW_DIM_X = PALETTE_POS_X + PALETTE_DIM + SLIDER_THICKNESS; + VIEW_DIM_Y = Math.max(mNewSwatchRect.bottom, PALETTE_DIM); + } + + //Rainbows make everybody happy! + mSpectrumColorsRev = new int[] { + 0xFFFF0000, 0xFFFF00FF, 0xFF0000FF, 0xFF00FFFF, + 0xFF00FF00, 0xFFFFFF00, 0xFFFF0000, + }; + + //Setup all the Paint and Shader objects. There are lots of them! + + //NEW_METHOD_WORK_NEEDED_HERE + //Add Paints to represent the palettes of the new method's UI controllers + + mSwatchOld = new Paint(Paint.ANTI_ALIAS_FLAG); + mSwatchOld.setStyle(Paint.Style.FILL); + mSwatchOld.setColor(Color.HSVToColor(mHSV)); + + mSwatchNew = new Paint(Paint.ANTI_ALIAS_FLAG); + mSwatchNew.setStyle(Paint.Style.FILL); + mSwatchNew.setColor(Color.HSVToColor(mHSV)); + + Shader shaderA = new SweepGradient(0, 0, mSpectrumColorsRev, null); + Shader shaderB = new RadialGradient(0, 0, PALETTE_CENTER_X, 0xFFFFFFFF, 0xFF000000, Shader.TileMode.CLAMP); + Shader shader = new ComposeShader(shaderA, shaderB, PorterDuff.Mode.SCREEN); + mOvalHueSat = new Paint(Paint.ANTI_ALIAS_FLAG); + mOvalHueSat.setShader(shader); + mOvalHueSat.setStyle(Paint.Style.FILL); + mOvalHueSat.setDither(true); + + mVerSliderBM = Bitmap.createBitmap(SLIDER_THICKNESS, PALETTE_DIM, Bitmap.Config.RGB_565); + mVerSliderCv = new Canvas(mVerSliderBM); + + for (int i = 0; i < 3; i++) { + mHorSlidersBM[i] = Bitmap.createBitmap(PALETTE_DIM, SLIDER_THICKNESS, Bitmap.Config.RGB_565); + mHorSlidersCv[i] = new Canvas(mHorSlidersBM[i]); + } + + mValDimmer = new Paint(Paint.ANTI_ALIAS_FLAG); + mValDimmer.setStyle(Paint.Style.FILL); + mValDimmer.setDither(true); + mValDimmer.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.MULTIPLY)); + + //Whew, we're done making the big Paints and Shaders for the swatches, palettes, and sliders. + //Now we need to make the Paints and Shaders that will draw the little method icons in the method selector list. + + //NEW_METHOD_WORK_NEEDED_HERE + //Add Paints to represent the icon for the new method + + shaderA = new SweepGradient(0, 0, mSpectrumColorsRev, null); + shaderB = new RadialGradient(0, 0, PALETTE_DIM / 2, 0xFFFFFFFF, 0xFF000000, Shader.TileMode.CLAMP); + shader = new ComposeShader(shaderA, shaderB, PorterDuff.Mode.SCREEN); + mOvalHueSatSmall = new Paint(Paint.ANTI_ALIAS_FLAG); + mOvalHueSatSmall.setShader(shader); + mOvalHueSatSmall.setStyle(Paint.Style.FILL); + + //Make a simple stroking Paint for drawing markers and borders and stuff like that. + mPosMarker = new Paint(Paint.ANTI_ALIAS_FLAG); + mPosMarker.setStyle(Paint.Style.STROKE); + mPosMarker.setStrokeWidth(2); + + //Make a basic text Paint. + mText = new Paint(Paint.ANTI_ALIAS_FLAG); + mText.setTextSize(TEXT_SIZE); + mText.setColor(Color.WHITE); + + //Kickstart + initUI(); + } + + /** + * Draw the entire view (the entire dialog). + */ + @Override + protected void onDraw(Canvas canvas) { + //Draw the old and new swatches + drawSwatches(canvas); + + //Write the text + writeColorParams(canvas); + + //Draw the palette and sliders (the UI) + if (mMethod == METHOD_HS_V_PALETTE) + drawHSV1Palette(canvas); + } + + /** + * Draw the old and new swatches. + * @param canvas + */ + private void drawSwatches(Canvas canvas) { + float[] hsv = new float[3]; + + mText.setTextSize(16); + + //Draw the original swatch + canvas.drawRect(mOldSwatchRect, mSwatchOld); + Color.colorToHSV(mOriginalColor, hsv); + //if (UberColorPickerDialog.isGray(mColor)) //Don't need this right here, but imp't to note + // hsv[1] = 0; + if (hsv[2] > .5) + mText.setColor(Color.BLACK); + canvas.drawText("Revert", mOldSwatchRect.left + SWATCH_WIDTH / 2 - mText.measureText("Revert") / 2, mOldSwatchRect.top + 16, mText); + mText.setColor(Color.WHITE); + + //Draw the new swatch + canvas.drawRect(mNewSwatchRect, mSwatchNew); + if (mHSV[2] > .5) + mText.setColor(Color.BLACK); + canvas.drawText("Accept", mNewSwatchRect.left + SWATCH_WIDTH / 2 - mText.measureText("Accept") / 2, mNewSwatchRect.top + 16, mText); + mText.setColor(Color.WHITE); + + mText.setTextSize(TEXT_SIZE); + } + + /** + * Write the color parametes (HSV, RGB, YUV, Hex, etc.). + * @param canvas + */ + private void writeColorParams(Canvas canvas) { + if (mHSVenabled) { + canvas.drawText("H: " + Integer.toString((int)(mHSV[0] / 360.0f * 255)), TEXT_HSV_POS[0], TEXT_HSV_POS[1] + TEXT_SIZE, mText); + canvas.drawText("S: " + Integer.toString((int)(mHSV[1] * 255)), TEXT_HSV_POS[0], TEXT_HSV_POS[1] + TEXT_SIZE * 2, mText); + canvas.drawText("V: " + Integer.toString((int)(mHSV[2] * 255)), TEXT_HSV_POS[0], TEXT_HSV_POS[1] + TEXT_SIZE * 3, mText); + } + + if (mRGBenabled) { + canvas.drawText("R: " + mRGB[0], TEXT_RGB_POS[0], TEXT_RGB_POS[1] + TEXT_SIZE, mText); + canvas.drawText("G: " + mRGB[1], TEXT_RGB_POS[0], TEXT_RGB_POS[1] + TEXT_SIZE * 2, mText); + canvas.drawText("B: " + mRGB[2], TEXT_RGB_POS[0], TEXT_RGB_POS[1] + TEXT_SIZE * 3, mText); + } + + if (mYUVenabled) { + canvas.drawText("Y: " + Integer.toString((int)(mYUV[0] * 255)), TEXT_YUV_POS[0], TEXT_YUV_POS[1] + TEXT_SIZE, mText); + canvas.drawText("U: " + Integer.toString((int)((mYUV[1] + .5f) * 255)), TEXT_YUV_POS[0], TEXT_YUV_POS[1] + TEXT_SIZE * 2, mText); + canvas.drawText("V: " + Integer.toString((int)((mYUV[2] + .5f) * 255)), TEXT_YUV_POS[0], TEXT_YUV_POS[1] + TEXT_SIZE * 3, mText); + } + + if (mHexenabled) + canvas.drawText("#" + mHexStr, TEXT_HEX_POS[0], TEXT_HEX_POS[1] + TEXT_SIZE, mText); + } + + /** + * Place a small circle on the 2D palette to indicate the current values. + * @param canvas + * @param markerPosX + * @param markerPosY + */ + private void mark2DPalette(Canvas canvas, int markerPosX, int markerPosY) { + mPosMarker.setColor(Color.BLACK); + canvas.drawOval(new RectF(markerPosX - 5, markerPosY - 5, markerPosX + 5, markerPosY + 5), mPosMarker); + mPosMarker.setColor(Color.WHITE); + canvas.drawOval(new RectF(markerPosX - 3, markerPosY - 3, markerPosX + 3, markerPosY + 3), mPosMarker); + } + + /** + * Draw a line across the slider to indicate its current value. + * @param canvas + * @param markerPos + */ + private void markVerSlider(Canvas canvas, int markerPos) { + mPosMarker.setColor(Color.BLACK); + canvas.drawRect(new Rect(0, markerPos - 2, SLIDER_THICKNESS, markerPos + 3), mPosMarker); + mPosMarker.setColor(Color.WHITE); + canvas.drawRect(new Rect(0, markerPos, SLIDER_THICKNESS, markerPos + 1), mPosMarker); + } + + /** + * Frame the slider to indicate that it has trackball focus. + * @param canvas + */ + private void hilightFocusedVerSlider(Canvas canvas) { + mPosMarker.setColor(Color.WHITE); + canvas.drawRect(new Rect(0, 0, SLIDER_THICKNESS, PALETTE_DIM), mPosMarker); + mPosMarker.setColor(Color.BLACK); + canvas.drawRect(new Rect(2, 2, SLIDER_THICKNESS - 2, PALETTE_DIM - 2), mPosMarker); + } + + /** + * Frame the 2D palette to indicate that it has trackball focus. + * @param canvas + */ + private void hilightFocusedOvalPalette(Canvas canvas) { + mPosMarker.setColor(Color.WHITE); + canvas.drawOval(new RectF(-PALETTE_RADIUS, -PALETTE_RADIUS, PALETTE_RADIUS, PALETTE_RADIUS), mPosMarker); + mPosMarker.setColor(Color.BLACK); + canvas.drawOval(new RectF(-PALETTE_RADIUS + 2, -PALETTE_RADIUS + 2, PALETTE_RADIUS - 2, PALETTE_RADIUS - 2), mPosMarker); + } + + //NEW_METHOD_WORK_NEEDED_HERE + //To add a new method, replicate the basic draw functions here. Use the 2D palette or 1D sliders as templates for the new method. + /** + * Draw the UI for HSV with angular H and radial S combined in 2D and a 1D V slider. + * @param canvas + */ + private void drawHSV1Palette(Canvas canvas) { + canvas.save(); + + canvas.translate(PALETTE_POS_X, PALETTE_POS_Y); + + //Draw the 2D palette + canvas.translate(PALETTE_CENTER_X, PALETTE_CENTER_Y); + canvas.drawOval(new RectF(-PALETTE_RADIUS, -PALETTE_RADIUS, PALETTE_RADIUS, PALETTE_RADIUS), mOvalHueSat); + canvas.drawOval(new RectF(-PALETTE_RADIUS, -PALETTE_RADIUS, PALETTE_RADIUS, PALETTE_RADIUS), mValDimmer); + if (mFocusedControl == 0) + hilightFocusedOvalPalette(canvas); + mark2DPalette(canvas, mCoord[0], mCoord[1]); + canvas.translate(-PALETTE_CENTER_X, -PALETTE_CENTER_Y); + + //Draw the 1D slider + canvas.translate(PALETTE_DIM, 0); + canvas.drawBitmap(mVerSliderBM, 0, 0, null); + if (mFocusedControl == 1) + hilightFocusedVerSlider(canvas); + markVerSlider(canvas, mCoord[2]); + + canvas.restore(); + } + + /** + * Initialize the current color chooser's UI (set its color parameters and set its palette and slider values accordingly). + */ + private void initUI() { + initHSV1Palette(); + + //Focus on the first controller (arbitrary). + mFocusedControl = 0; + } + + //NEW_METHOD_WORK_NEEDED_HERE + //To add a new method, replicate and extend the last init function shown below + /** + * Initialize a color chooser. + */ + private void initHSV1Palette() { + setOvalValDimmer(); + setVerValSlider(); + + float angle = 2*PI - mHSV[0] / (180 / 3.1415927f); + float radius = mHSV[1] * PALETTE_RADIUS; + mCoord[0] = (int)(Math.cos(angle) * radius); + mCoord[1] = (int)(Math.sin(angle) * radius); + + mCoord[2] = PALETTE_DIM - (int)(mHSV[2] * PALETTE_DIM); + } + + //NEW_METHOD_WORK_NEEDED_HERE + //To add a new method, replicate and extend the set functions below, one per UI controller in the new method + /** + * Adjust a Paint which, when painted, dims its underlying object to show the effects of varying value (brightness). + */ + private void setOvalValDimmer() { + float[] hsv = new float[3]; + hsv[0] = mHSV[0]; + hsv[1] = 0; + hsv[2] = mHSV[2]; + int gray = Color.HSVToColor(hsv); + mValDimmer.setColor(gray); + } + + /** + * Create a linear gradient shader to show variations in value. + */ + private void setVerValSlider() { + float[] hsv = new float[3]; + hsv[0] = mHSV[0]; + hsv[1] = mHSV[1]; + hsv[2] = 1; + int col = Color.HSVToColor(hsv); + + int colors[] = new int[2]; + colors[0] = col; + colors[1] = 0xFF000000; + GradientDrawable gradDraw = new GradientDrawable(Orientation.TOP_BOTTOM, colors); + gradDraw.setDither(true); + gradDraw.setLevel(10000); + gradDraw.setBounds(0, 0, SLIDER_THICKNESS, PALETTE_DIM); + gradDraw.draw(mVerSliderCv); + } + + /** + * Report the correct tightly bounded dimensions of the view. + */ + @Override + protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { + setMeasuredDimension(VIEW_DIM_X, VIEW_DIM_Y); + } + + /** + * Wrap Math.round(). I'm not a Java expert. Is this the only way to avoid writing "(int)Math.round" everywhere? + * @param x + * @return + */ + private int round(double x) { + return (int)Math.round(x); + } + + /** + * Limit a value to the range [0,1]. + * @param n + * @return + */ + private float pinToUnit(float n) { + if (n < 0) { + n = 0; + } else if (n > 1) { + n = 1; + } + return n; + } + + /** + * Limit a value to the range [0,max]. + * @param n + * @param max + * @return + */ + private float pin(float n, float max) { + if (n < 0) { + n = 0; + } else if (n > max) { + n = max; + } + return n; + } + + /** + * Limit a value to the range [min,max]. + * @param n + * @param min + * @param max + * @return + */ + private float pin(float n, float min, float max) { + if (n < min) { + n = min; + } else if (n > max) { + n = max; + } + return n; + } + + /** + * No clue what this does (some sort of average/mean I presume). It came with the original UberColorPickerDialog + * in the API Demos and wasn't documented. I don't feel like spending any time figuring it out, I haven't looked at it at all. + * @param s + * @param d + * @param p + * @return + */ + private int ave(int s, int d, float p) { + return s + round(p * (d - s)); + } + + /** + * Came with the original UberColorPickerDialog in the API Demos, wasn't documented. I believe it takes an array of + * colors and a value in the range [0,1] and interpolates a resulting color in a seemingly predictable manner. + * I haven't looked at it at all. + * @param colors + * @param unit + * @return + */ + 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); + } + + /** + * A standard point-in-rect routine. + * @param x + * @param y + * @param r + * @return true if point x,y is in rect r + */ + public boolean ptInRect(int x, int y, Rect r) { + return x > r.left && x < r.right && y > r.top && y < r.bottom; + } + + /** + * Process trackball events. Used mainly for fine-tuned color adjustment, or alternatively to switch between slider controls. + */ + @Override + public boolean dispatchTrackballEvent(MotionEvent event) { + float x = event.getX(); + float y = event.getY(); + + //A longer event history implies faster trackball movement. + //Use it to infer a larger jump and therefore faster palette/slider adjustment. + int jump = event.getHistorySize() + 1; + + switch (event.getAction()) { + case MotionEvent.ACTION_DOWN: { + } + break; + case MotionEvent.ACTION_MOVE: { + //NEW_METHOD_WORK_NEEDED_HERE + //To add a new method, replicate and extend the appropriate entry in this list, + //depending on whether you use 1D or 2D controllers + switch (mMethod) { + case METHOD_HS_V_PALETTE: + if (mFocusedControl == 0) { + changeHSPalette(x, y, jump); + } + else if (mFocusedControl == 1) { + if (y < 0) + changeSlider(mFocusedControl, true, jump); + else if (y > 0) + changeSlider(mFocusedControl, false, jump); + } + break; + } + } + break; + case MotionEvent.ACTION_UP: { + } + break; + } + + return true; + } + + //NEW_METHOD_WORK_NEEDED_HERE + //To add a new method, replicate and extend the appropriate functions below, + //one per UI controller in the new method + /** + * Effect a trackball change to a 2D palette. + * @param x -1: negative x change, 0: no x change, +1: positive x change. + * @param y -1: negative y change, 0, no y change, +1: positive y change. + * @param jump the amount by which to change. + */ + private void changeHSPalette(float x, float y, int jump) { + int x2 = 0, y2 = 0; + if (x < 0) + x2 = -jump; + else if (x > 0) + x2 = jump; + if (y < 0) + y2 = -jump; + else if (y > 0) + y2 = jump; + + mCoord[0] += x2; + mCoord[1] += y2; + + if (mCoord[0] < -PALETTE_RADIUS) + mCoord[0] = -PALETTE_RADIUS; + else if (mCoord[0] > PALETTE_RADIUS) + mCoord[0] = PALETTE_RADIUS; + if (mCoord[1] < -PALETTE_RADIUS) + mCoord[1] = -PALETTE_RADIUS; + else if (mCoord[1] > PALETTE_RADIUS) + mCoord[1] = PALETTE_RADIUS; + + float radius = (float)java.lang.Math.sqrt(mCoord[0] * mCoord[0] + mCoord[1] * mCoord[1]); + if (radius > PALETTE_RADIUS) + radius = PALETTE_RADIUS; + + float angle = (float)java.lang.Math.atan2(mCoord[1], mCoord[0]); + // need to turn angle [-PI ... PI] into unit [0....1] + float unit = angle/(2*PI); + if (unit < 0) { + unit += 1; + } + + mCoord[0] = round(Math.cos(angle) * radius); + mCoord[1] = round(Math.sin(angle) * radius); + + int c = interpColor(mSpectrumColorsRev, unit); + float[] hsv = new float[3]; + Color.colorToHSV(c, hsv); + mHSV[0] = hsv[0]; + mHSV[1] = radius / PALETTE_RADIUS; + updateAllFromHSV(); + mSwatchNew.setColor(Color.HSVToColor(mHSV)); + + setVerValSlider(); + + invalidate(); + } + + /** + * Effect a trackball change to a 1D slider. + * @param slider id of the slider to be effected + * @param increase true if the change is an increase, false if a decrease + * @param jump the amount by which to change in units of the range [0,255] + */ + private void changeSlider(int slider, boolean increase, int jump) { + //NEW_METHOD_WORK_NEEDED_HERE + //It is only necessary to add an entry here for a new method if the new method uses a 1D slider. + //Note, some sliders are horizontal and others are vertical. + //They differ a bit, especially in a sign flip on the vertical axis. + if (mMethod == METHOD_HS_V_PALETTE) { + //slider *must* equal 1 + + mHSV[2] += (increase ? jump : -jump) / 256.0f; + mHSV[2] = pinToUnit(mHSV[2]); + updateAllFromHSV(); + mCoord[2] = PALETTE_DIM - (int)(mHSV[2] * PALETTE_DIM); + + mSwatchNew.setColor(Color.HSVToColor(mHSV)); + + setOvalValDimmer(); + + invalidate(); + } + } + + /** + * Keep all colorspace representations in sync. + */ + private void updateRGBfromHSV() { + int color = Color.HSVToColor(mHSV); + mRGB[0] = Color.red(color); + mRGB[1] = Color.green(color); + mRGB[2] = Color.blue(color); + } + + /** + * Keep all colorspace representations in sync. + */ + private void updateYUVfromRGB() { + float r = mRGB[0] / 255.0f; + float g = mRGB[1] / 255.0f; + float b = mRGB[2] / 255.0f; + + ColorMatrix cm = new ColorMatrix(); + cm.setRGB2YUV(); + final float[] a = cm.getArray(); + + mYUV[0] = a[0] * r + a[1] * g + a[2] * b; + mYUV[0] = pinToUnit(mYUV[0]); + mYUV[1] = a[5] * r + a[6] * g + a[7] * b; + mYUV[1] = pin(mYUV[1], -.5f, .5f); + mYUV[2] = a[10] * r + a[11] * g + a[12] * b; + mYUV[2] = pin(mYUV[2], -.5f, .5f); + } + + /** + * Keep all colorspace representations in sync. + */ + private void updateHexFromHSV() { + //For now, assume 100% opacity + mHexStr = Integer.toHexString(Color.HSVToColor(mHSV)).toUpperCase(); + mHexStr = mHexStr.substring(2, mHexStr.length()); + } + + /** + * Keep all colorspace representations in sync. + */ + private void updateAllFromHSV() { + //Update mRGB + if (mRGBenabled || mYUVenabled) + updateRGBfromHSV(); + + //Update mYUV + if (mYUVenabled) + updateYUVfromRGB(); + + //Update mHexStr + if (mRGBenabled) + updateHexFromHSV(); + } + + /** + * Process touch events: down, move, and up + */ + @Override + public boolean onTouchEvent(MotionEvent event) { + float x = event.getX(); + float y = event.getY(); + + //Generate coordinates which are palette=local with the origin at the upper left of the main 2D palette + int y2 = (int)(pin(round(y - PALETTE_POS_Y), PALETTE_DIM)); + + //Generate coordinates which are palette-local with the origin at the center of the main 2D palette + float circlePinnedX = x - PALETTE_POS_X - PALETTE_CENTER_X; + float circlePinnedY = y - PALETTE_POS_Y - PALETTE_CENTER_Y; + + //Is the event in a swatch? + boolean inSwatchOld = ptInRect(round(x), round(y), mOldSwatchRect); + boolean inSwatchNew = ptInRect(round(x), round(y), mNewSwatchRect); + + //Get the event's distance from the center of the main 2D palette + float radius = (float)java.lang.Math.sqrt(circlePinnedX * circlePinnedX + circlePinnedY * circlePinnedY); + + //Is the event in a circle-pinned 2D palette? + boolean inOvalPalette = radius <= PALETTE_RADIUS; + + //Pin the radius + if (radius > PALETTE_RADIUS) + radius = PALETTE_RADIUS; + + //Is the event in a vertical slider to the right of the main 2D palette + boolean inVerSlider = ptInRect(round(x), round(y), mVerSliderRect); + + switch (event.getAction()) { + case MotionEvent.ACTION_DOWN: + mTracking = TRACKED_NONE; + + if (inSwatchOld) + mTracking = TRACK_SWATCH_OLD; + else if (inSwatchNew) + mTracking = TRACK_SWATCH_NEW; + + //NEW_METHOD_WORK_NEEDED_HERE + //To add a new method, replicate and extend the last entry in this list + else if (mMethod == METHOD_HS_V_PALETTE) { + if (inOvalPalette) { + mTracking = TRACK_HS_PALETTE; + mFocusedControl = 0; + } + else if (inVerSlider) { + mTracking = TRACK_VER_VALUE_SLIDER; + mFocusedControl = 1; + } + } + case MotionEvent.ACTION_MOVE: + //NEW_METHOD_WORK_NEEDED_HERE + //To add a new method, replicate and extend the entries in this list, + //one per UI controller the new method requires. + if (mTracking == TRACK_HS_PALETTE) { + float angle = (float)java.lang.Math.atan2(circlePinnedY, circlePinnedX); + // need to turn angle [-PI ... PI] into unit [0....1] + float unit = angle/(2*PI); + if (unit < 0) { + unit += 1; + } + + mCoord[0] = round(Math.cos(angle) * radius); + mCoord[1] = round(Math.sin(angle) * radius); + + int c = interpColor(mSpectrumColorsRev, unit); + float[] hsv = new float[3]; + Color.colorToHSV(c, hsv); + mHSV[0] = hsv[0]; + mHSV[1] = radius / PALETTE_RADIUS; + updateAllFromHSV(); + mSwatchNew.setColor(Color.HSVToColor(mHSV)); + + setVerValSlider(); + + invalidate(); + } + else if (mTracking == TRACK_VER_VALUE_SLIDER) { + if (mCoord[2] != y2) { + mCoord[2] = y2; + float value = 1.0f - (float)y2 / (float)PALETTE_DIM; + + mHSV[2] = value; + updateAllFromHSV(); + mSwatchNew.setColor(Color.HSVToColor(mHSV)); + + setOvalValDimmer(); + + invalidate(); + } + } + break; + case MotionEvent.ACTION_UP: + //NEW_METHOD_WORK_NEEDED_HERE + //To add a new method, replicate and extend the last entry in this list. + if (mTracking == TRACK_SWATCH_OLD && inSwatchOld) { + Color.colorToHSV(mOriginalColor, mHSV); + mSwatchNew.setColor(mOriginalColor); + initUI(); + invalidate(); + } + else if (mTracking == TRACK_SWATCH_NEW && inSwatchNew) { + mListener.colorChanged(mSwatchNew.getColor()); + invalidate(); + } + + mTracking= TRACKED_NONE; + break; + } + + return true; + } + } +} |