| 1 | // Copyright 2013 The Chromium Authors. All rights reserved. |
| 2 | // Use of this source code is governed by a BSD-style license that can be |
| 3 | // found in the LICENSE file. |
| 4 | |
| 5 | package org.chromium.ui; |
| 6 | |
| 7 | import android.content.Context; |
| 8 | import android.graphics.Color; |
| 9 | import android.util.AttributeSet; |
| 10 | import android.view.LayoutInflater; |
| 11 | import android.view.View; |
| 12 | import android.view.accessibility.AccessibilityEvent; |
| 13 | import android.widget.LinearLayout; |
| 14 | import android.widget.SeekBar; |
| 15 | import android.widget.SeekBar.OnSeekBarChangeListener; |
| 16 | |
| 17 | /** |
| 18 | * Represents a more advanced way for the user to choose a color, based on selecting each of |
| 19 | * the Hue, Saturation and Value attributes. |
| 20 | */ |
| 21 | public class ColorPickerAdvanced extends LinearLayout implements OnSeekBarChangeListener { |
| 22 | private static final int HUE_SEEK_BAR_MAX = 360; |
| 23 | |
| 24 | private static final int HUE_COLOR_COUNT = 7; |
| 25 | |
| 26 | private static final int SATURATION_SEEK_BAR_MAX = 100; |
| 27 | |
| 28 | private static final int SATURATION_COLOR_COUNT = 2; |
| 29 | |
| 30 | private static final int VALUE_SEEK_BAR_MAX = 100; |
| 31 | |
| 32 | private static final int VALUE_COLOR_COUNT = 2; |
| 33 | |
| 34 | ColorPickerAdvancedComponent mHueDetails; |
| 35 | |
| 36 | ColorPickerAdvancedComponent mSaturationDetails; |
| 37 | |
| 38 | ColorPickerAdvancedComponent mValueDetails; |
| 39 | |
| 40 | private OnColorChangedListener mOnColorChangedListener; |
| 41 | |
| 42 | private int mCurrentColor; |
| 43 | |
| 44 | private final float[] mCurrentHsvValues = new float[3]; |
| 45 | |
| 46 | public ColorPickerAdvanced(Context context, AttributeSet attrs) { |
| 47 | super(context, attrs); |
| 48 | init(); |
| 49 | } |
| 50 | |
| 51 | public ColorPickerAdvanced(Context context, AttributeSet attrs, int defStyle) { |
| 52 | super(context, attrs, defStyle); |
| 53 | init(); |
| 54 | } |
| 55 | |
| 56 | public ColorPickerAdvanced(Context context) { |
| 57 | super(context); |
| 58 | init(); |
| 59 | } |
| 60 | |
| 61 | /** |
| 62 | * Initializes all the views and variables in the advanced view. |
| 63 | */ |
| 64 | private void init() { |
| 65 | setOrientation(LinearLayout.VERTICAL); |
| 66 | |
| 67 | mHueDetails = createAndAddNewGradient(R.string.color_picker_hue, |
| 68 | HUE_SEEK_BAR_MAX, this); |
| 69 | mSaturationDetails = createAndAddNewGradient(R.string.color_picker_saturation, |
| 70 | SATURATION_SEEK_BAR_MAX, this); |
| 71 | mValueDetails = createAndAddNewGradient(R.string.color_picker_value, |
| 72 | VALUE_SEEK_BAR_MAX, this); |
| 73 | |
| 74 | refreshGradientComponents(); |
| 75 | } |
| 76 | |
| 77 | /** |
| 78 | * Creates a new GradientDetails object from the parameters provided, initializes it, |
| 79 | * and adds it to this advanced view. |
| 80 | * |
| 81 | * @param textResourceId The text to display for the label. |
| 82 | * @param seekBarMax The maximum value of the seek bar for the gradient. |
| 83 | * @param seekBarListener Object listening to when the user changes the seek bar. |
| 84 | * |
| 85 | * @return A new GradientDetails object initialized with the given parameters. |
| 86 | */ |
| 87 | public ColorPickerAdvancedComponent createAndAddNewGradient(int textResourceId, |
| 88 | int seekBarMax, |
| 89 | OnSeekBarChangeListener seekBarListener) { |
| 90 | LayoutInflater inflater = (LayoutInflater) getContext() |
| 91 | .getSystemService(Context.LAYOUT_INFLATER_SERVICE); |
| 92 | View newComponent = inflater.inflate(R.layout.color_picker_advanced_component, null); |
| 93 | addView(newComponent); |
| 94 | |
| 95 | return new ColorPickerAdvancedComponent(newComponent, |
| 96 | textResourceId, |
| 97 | seekBarMax, |
| 98 | seekBarListener); |
| 99 | } |
| 100 | |
| 101 | /** |
| 102 | * Sets the listener for when the user changes the color. |
| 103 | * |
| 104 | * @param onColorChangedListener The object listening for the change in color. |
| 105 | */ |
| 106 | public void setListener(OnColorChangedListener onColorChangedListener) { |
| 107 | mOnColorChangedListener = onColorChangedListener; |
| 108 | } |
| 109 | |
| 110 | /** |
| 111 | * @return The color the user has currently chosen. |
| 112 | */ |
| 113 | public int getColor() { |
| 114 | return mCurrentColor; |
| 115 | } |
| 116 | |
| 117 | /** |
| 118 | * Sets the color that the user has currently chosen. |
| 119 | * |
| 120 | * @param color The currently chosen color. |
| 121 | */ |
| 122 | public void setColor(int color) { |
| 123 | mCurrentColor = color; |
| 124 | Color.colorToHSV(mCurrentColor, mCurrentHsvValues); |
| 125 | refreshGradientComponents(); |
| 126 | } |
| 127 | |
| 128 | /** |
| 129 | * Notifies the listener, if there is one, of a change in the selected color. |
| 130 | */ |
| 131 | private void notifyColorChanged() { |
| 132 | if (mOnColorChangedListener != null) { |
| 133 | mOnColorChangedListener.onColorChanged(getColor()); |
| 134 | } |
| 135 | } |
| 136 | |
| 137 | /** |
| 138 | * Callback for when a slider is updated on the advanced view. |
| 139 | * |
| 140 | * @param seekBar The color slider that was updated. |
| 141 | * @param progress The new value of the color slider. |
| 142 | * @param fromUser Whether it was the user the changed the value, or whether |
| 143 | * we were setting it up. |
| 144 | */ |
| 145 | @Override |
| 146 | public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) { |
| 147 | if (fromUser) { |
| 148 | mCurrentHsvValues[0] = mHueDetails.getValue(); |
| 149 | mCurrentHsvValues[1] = mSaturationDetails.getValue() / 100.0f; |
| 150 | mCurrentHsvValues[2] = mValueDetails.getValue() / 100.0f; |
| 151 | |
| 152 | mCurrentColor = Color.HSVToColor(mCurrentHsvValues); |
| 153 | |
| 154 | updateHueGradient(); |
| 155 | updateSaturationGradient(); |
| 156 | updateValueGradient(); |
| 157 | |
| 158 | notifyColorChanged(); |
| 159 | } |
| 160 | } |
| 161 | |
| 162 | /** |
| 163 | * Updates only the hue gradient display with the hue value for the |
| 164 | * currently selected color. |
| 165 | */ |
| 166 | private void updateHueGradient() { |
| 167 | float[] tempHsvValues = new float[3]; |
| 168 | tempHsvValues[1] = mCurrentHsvValues[1]; |
| 169 | tempHsvValues[2] = mCurrentHsvValues[2]; |
| 170 | |
| 171 | int[] newColors = new int[HUE_COLOR_COUNT]; |
| 172 | |
| 173 | for (int i = 0; i < HUE_COLOR_COUNT; ++i) { |
| 174 | tempHsvValues[0] = i * 60.0f; |
| 175 | newColors[i] = Color.HSVToColor(tempHsvValues); |
| 176 | } |
| 177 | mHueDetails.setGradientColors(newColors); |
| 178 | } |
| 179 | |
| 180 | /** |
| 181 | * Updates only the saturation gradient display with the saturation value |
| 182 | * for the currently selected color. |
| 183 | */ |
| 184 | private void updateSaturationGradient() { |
| 185 | float[] tempHsvValues = new float[3]; |
| 186 | tempHsvValues[0] = mCurrentHsvValues[0]; |
| 187 | tempHsvValues[1] = 0.0f; |
| 188 | tempHsvValues[2] = mCurrentHsvValues[2]; |
| 189 | |
| 190 | int[] newColors = new int[SATURATION_COLOR_COUNT]; |
| 191 | |
| 192 | newColors[0] = Color.HSVToColor(tempHsvValues); |
| 193 | |
| 194 | tempHsvValues[1] = 1.0f; |
| 195 | newColors[1] = Color.HSVToColor(tempHsvValues); |
| 196 | mSaturationDetails.setGradientColors(newColors); |
| 197 | } |
| 198 | |
| 199 | /** |
| 200 | * Updates only the Value gradient display with the Value amount for |
| 201 | * the currently selected color. |
| 202 | */ |
| 203 | private void updateValueGradient() { |
| 204 | float[] tempHsvValues = new float[3]; |
| 205 | tempHsvValues[0] = mCurrentHsvValues[0]; |
| 206 | tempHsvValues[1] = mCurrentHsvValues[1]; |
| 207 | tempHsvValues[2] = 0.0f; |
| 208 | |
| 209 | int[] newColors = new int[VALUE_COLOR_COUNT]; |
| 210 | |
| 211 | newColors[0] = Color.HSVToColor(tempHsvValues); |
| 212 | |
| 213 | tempHsvValues[2] = 1.0f; |
| 214 | newColors[1] = Color.HSVToColor(tempHsvValues); |
| 215 | mValueDetails.setGradientColors(newColors); |
| 216 | } |
| 217 | |
| 218 | /** |
| 219 | * Updates all the gradient displays to show the currently selected color. |
| 220 | */ |
| 221 | private void refreshGradientComponents() { |
| 222 | // Round and bound the saturation value. |
| 223 | int saturationValue = Math.round(mCurrentHsvValues[1] * 100.0f); |
| 224 | saturationValue = Math.min(saturationValue, SATURATION_SEEK_BAR_MAX); |
| 225 | saturationValue = Math.max(saturationValue, 0); |
| 226 | |
| 227 | // Round and bound the Value amount. |
| 228 | int valueValue = Math.round(mCurrentHsvValues[2] * 100.0f); |
| 229 | valueValue = Math.min(valueValue, VALUE_SEEK_BAR_MAX); |
| 230 | valueValue = Math.max(valueValue, 0); |
| 231 | |
| 232 | // Don't need to round the hue value since its possible values match the seek bar |
| 233 | // range directly. |
| 234 | mHueDetails.setValue(mCurrentHsvValues[0]); |
| 235 | mSaturationDetails.setValue(saturationValue); |
| 236 | mValueDetails.setValue(valueValue); |
| 237 | |
| 238 | updateHueGradient(); |
| 239 | updateSaturationGradient(); |
| 240 | updateValueGradient(); |
| 241 | } |
| 242 | |
| 243 | @Override |
| 244 | public void onStartTrackingTouch(SeekBar seekBar) { |
| 245 | // Do nothing. |
| 246 | } |
| 247 | |
| 248 | @Override |
| 249 | public void onStopTrackingTouch(SeekBar seekBar) { |
| 250 | // Do nothing. |
| 251 | } |
| 252 | } |