Ruben Brunk | 1a66445 | 2013-04-04 17:20:42 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2013 The Android Open Source Project |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
| 16 | |
| 17 | package com.android.gallery3d.filtershow.crop; |
| 18 | |
| 19 | import android.graphics.Rect; |
| 20 | import android.graphics.RectF; |
| 21 | |
| 22 | import com.android.gallery3d.filtershow.imageshow.GeometryMath; |
| 23 | |
| 24 | public class CropObject { |
| 25 | |
| 26 | private BoundedRect mBoundedRect; |
| 27 | private float mAspectWidth = 1; |
| 28 | private float mAspectHeight = 1; |
| 29 | private boolean mFixAspectRatio = false; |
| 30 | private float mRotation = 0; |
| 31 | private float mTouchTolerance = 45; |
| 32 | private float mMinSideSize = 20; |
| 33 | |
| 34 | public static final int MOVE_NONE = 0; |
| 35 | // Sides |
| 36 | public static final int MOVE_LEFT = 1; |
| 37 | public static final int MOVE_TOP = 2; |
| 38 | public static final int MOVE_RIGHT = 4; |
| 39 | public static final int MOVE_BOTTOM = 8; |
| 40 | public static final int MOVE_BLOCK = 16; |
| 41 | |
| 42 | // Corners |
| 43 | public static final int TOP_LEFT = MOVE_TOP | MOVE_LEFT; |
| 44 | public static final int TOP_RIGHT = MOVE_TOP | MOVE_RIGHT; |
| 45 | public static final int BOTTOM_RIGHT = MOVE_BOTTOM | MOVE_RIGHT; |
| 46 | public static final int BOTTOM_LEFT = MOVE_BOTTOM | MOVE_LEFT; |
| 47 | |
| 48 | private int mMovingEdges = MOVE_NONE; |
| 49 | |
| 50 | public CropObject(Rect outerBound, Rect innerBound, int outerAngle) { |
| 51 | mBoundedRect = new BoundedRect(outerAngle % 360, outerBound, innerBound); |
| 52 | } |
| 53 | |
| 54 | public CropObject(RectF outerBound, RectF innerBound, int outerAngle) { |
| 55 | mBoundedRect = new BoundedRect(outerAngle % 360, outerBound, innerBound); |
| 56 | } |
| 57 | |
Ruben Brunk | 966f219 | 2013-04-11 12:39:03 -0700 | [diff] [blame^] | 58 | public void resetBoundsTo(RectF inner, RectF outer) { |
| 59 | mBoundedRect.resetTo(0, outer, inner); |
| 60 | } |
| 61 | |
| 62 | public void getInnerBounds(RectF r) { |
Ruben Brunk | 1a66445 | 2013-04-04 17:20:42 -0700 | [diff] [blame] | 63 | mBoundedRect.setToInner(r); |
| 64 | } |
| 65 | |
Ruben Brunk | 966f219 | 2013-04-11 12:39:03 -0700 | [diff] [blame^] | 66 | public void getOuterBounds(RectF r) { |
Ruben Brunk | 1a66445 | 2013-04-04 17:20:42 -0700 | [diff] [blame] | 67 | mBoundedRect.setToOuter(r); |
| 68 | } |
| 69 | |
| 70 | public RectF getInnerBounds() { |
| 71 | return mBoundedRect.getInner(); |
| 72 | } |
| 73 | |
| 74 | public RectF getOuterBounds() { |
| 75 | return mBoundedRect.getOuter(); |
| 76 | } |
| 77 | |
| 78 | public int getSelectState() { |
| 79 | return mMovingEdges; |
| 80 | } |
| 81 | |
| 82 | public boolean isFixedAspect() { |
| 83 | return mFixAspectRatio; |
| 84 | } |
| 85 | |
| 86 | public void rotateOuter(int angle) { |
| 87 | mRotation = angle % 360; |
| 88 | mBoundedRect.setRotation(mRotation); |
| 89 | clearSelectState(); |
| 90 | } |
| 91 | |
| 92 | public boolean setInnerAspectRatio(int width, int height) { |
| 93 | if (width <= 0 || height <= 0) { |
| 94 | throw new IllegalArgumentException("Width and Height must be greater than zero"); |
| 95 | } |
| 96 | RectF inner = mBoundedRect.getInner(); |
| 97 | CropMath.fixAspectRatioContained(inner, width, height); |
| 98 | if (inner.width() < mMinSideSize || inner.height() < mMinSideSize) { |
| 99 | return false; |
| 100 | } |
| 101 | mAspectWidth = width; |
| 102 | mAspectHeight = height; |
| 103 | mFixAspectRatio = true; |
| 104 | mBoundedRect.setInner(inner); |
| 105 | clearSelectState(); |
| 106 | return true; |
| 107 | } |
| 108 | |
| 109 | public void setTouchTolerance(float tolerance) { |
| 110 | if (tolerance <= 0) { |
| 111 | throw new IllegalArgumentException("Tolerance must be greater than zero"); |
| 112 | } |
| 113 | mTouchTolerance = tolerance; |
| 114 | } |
| 115 | |
| 116 | public void setMinInnerSideSize(float minSide) { |
| 117 | if (minSide <= 0) { |
| 118 | throw new IllegalArgumentException("Min dide must be greater than zero"); |
| 119 | } |
| 120 | mMinSideSize = minSide; |
| 121 | } |
| 122 | |
| 123 | public void unsetAspectRatio() { |
| 124 | mFixAspectRatio = false; |
| 125 | clearSelectState(); |
| 126 | } |
| 127 | |
| 128 | public boolean hasSelectedEdge() { |
| 129 | return mMovingEdges != MOVE_NONE; |
| 130 | } |
| 131 | |
| 132 | public static boolean checkCorner(int selected) { |
| 133 | return selected == TOP_LEFT || selected == TOP_RIGHT || selected == BOTTOM_RIGHT |
| 134 | || selected == BOTTOM_LEFT; |
| 135 | } |
| 136 | |
| 137 | public static boolean checkEdge(int selected) { |
| 138 | return selected == MOVE_LEFT || selected == MOVE_TOP || selected == MOVE_RIGHT |
| 139 | || selected == MOVE_BOTTOM; |
| 140 | } |
| 141 | |
| 142 | public static boolean checkBlock(int selected) { |
| 143 | return selected == MOVE_BLOCK; |
| 144 | } |
| 145 | |
| 146 | public static boolean checkValid(int selected) { |
| 147 | return selected == MOVE_NONE || checkBlock(selected) || checkEdge(selected) |
| 148 | || checkCorner(selected); |
| 149 | } |
| 150 | |
| 151 | public void clearSelectState() { |
| 152 | mMovingEdges = MOVE_NONE; |
| 153 | } |
| 154 | |
| 155 | public int wouldSelectEdge(float x, float y) { |
| 156 | int edgeSelected = calculateSelectedEdge(x, y); |
| 157 | if (edgeSelected != MOVE_NONE && edgeSelected != MOVE_BLOCK) { |
| 158 | return edgeSelected; |
| 159 | } |
| 160 | return MOVE_NONE; |
| 161 | } |
| 162 | |
| 163 | public boolean selectEdge(int edge) { |
| 164 | if (!checkValid(edge)) { |
| 165 | // temporary |
| 166 | throw new IllegalArgumentException("bad edge selected"); |
| 167 | // return false; |
| 168 | } |
| 169 | if ((mFixAspectRatio && !checkCorner(edge)) && !checkBlock(edge)) { |
| 170 | // temporary |
| 171 | throw new IllegalArgumentException("bad corner selected"); |
| 172 | // return false; |
| 173 | } |
| 174 | mMovingEdges = edge; |
| 175 | return true; |
| 176 | } |
| 177 | |
| 178 | public boolean selectEdge(float x, float y) { |
| 179 | int edgeSelected = calculateSelectedEdge(x, y); |
| 180 | if (mFixAspectRatio) { |
| 181 | edgeSelected = fixEdgeToCorner(edgeSelected); |
| 182 | } |
| 183 | if (edgeSelected == MOVE_NONE) { |
| 184 | return false; |
| 185 | } |
| 186 | return selectEdge(edgeSelected); |
| 187 | } |
| 188 | |
| 189 | public boolean moveCurrentSelection(float dX, float dY) { |
| 190 | if (mMovingEdges == MOVE_NONE) { |
| 191 | return false; |
| 192 | } |
| 193 | RectF crop = mBoundedRect.getInner(); |
| 194 | |
| 195 | float minWidthHeight = mMinSideSize; |
| 196 | |
| 197 | int movingEdges = mMovingEdges; |
| 198 | if (movingEdges == MOVE_BLOCK) { |
| 199 | mBoundedRect.moveInner(dX, dY); |
| 200 | return true; |
| 201 | } else { |
| 202 | float dx = 0; |
| 203 | float dy = 0; |
| 204 | |
| 205 | if ((movingEdges & MOVE_LEFT) != 0) { |
| 206 | dx = Math.min(crop.left + dX, crop.right - minWidthHeight) - crop.left; |
| 207 | } |
| 208 | if ((movingEdges & MOVE_TOP) != 0) { |
| 209 | dy = Math.min(crop.top + dY, crop.bottom - minWidthHeight) - crop.top; |
| 210 | } |
| 211 | if ((movingEdges & MOVE_RIGHT) != 0) { |
| 212 | dx = Math.max(crop.right + dX, crop.left + minWidthHeight) |
| 213 | - crop.right; |
| 214 | } |
| 215 | if ((movingEdges & MOVE_BOTTOM) != 0) { |
| 216 | dy = Math.max(crop.bottom + dY, crop.top + minWidthHeight) |
| 217 | - crop.bottom; |
| 218 | } |
| 219 | |
| 220 | if (mFixAspectRatio) { |
| 221 | float[] l1 = { |
| 222 | crop.left, crop.bottom |
| 223 | }; |
| 224 | float[] l2 = { |
| 225 | crop.right, crop.top |
| 226 | }; |
| 227 | if (movingEdges == TOP_LEFT || movingEdges == BOTTOM_RIGHT) { |
| 228 | l1[1] = crop.top; |
| 229 | l2[1] = crop.bottom; |
| 230 | } |
| 231 | float[] b = { |
| 232 | l1[0] - l2[0], l1[1] - l2[1] |
| 233 | }; |
| 234 | float[] disp = { |
| 235 | dx, dy |
| 236 | }; |
| 237 | float[] bUnit = GeometryMath.normalize(b); |
| 238 | float sp = GeometryMath.scalarProjection(disp, bUnit); |
| 239 | dx = sp * bUnit[0]; |
| 240 | dy = sp * bUnit[1]; |
| 241 | RectF newCrop = fixedCornerResize(crop, movingEdges, dx, dy); |
| 242 | |
| 243 | mBoundedRect.fixedAspectResizeInner(newCrop); |
| 244 | } else { |
| 245 | if ((movingEdges & MOVE_LEFT) != 0) { |
| 246 | crop.left += dx; |
| 247 | } |
| 248 | if ((movingEdges & MOVE_TOP) != 0) { |
| 249 | crop.top += dy; |
| 250 | } |
| 251 | if ((movingEdges & MOVE_RIGHT) != 0) { |
| 252 | crop.right += dx; |
| 253 | } |
| 254 | if ((movingEdges & MOVE_BOTTOM) != 0) { |
| 255 | crop.bottom += dy; |
| 256 | } |
| 257 | mBoundedRect.resizeInner(crop); |
| 258 | } |
| 259 | } |
| 260 | return true; |
| 261 | } |
| 262 | |
| 263 | // Helper methods |
| 264 | |
| 265 | private int calculateSelectedEdge(float x, float y) { |
| 266 | RectF cropped = mBoundedRect.getInner(); |
| 267 | |
| 268 | float left = Math.abs(x - cropped.left); |
| 269 | float right = Math.abs(x - cropped.right); |
| 270 | float top = Math.abs(y - cropped.top); |
| 271 | float bottom = Math.abs(y - cropped.bottom); |
| 272 | |
| 273 | int edgeSelected = MOVE_NONE; |
| 274 | // Check left or right. |
| 275 | if ((left <= mTouchTolerance) && ((y + mTouchTolerance) >= cropped.top) |
| 276 | && ((y - mTouchTolerance) <= cropped.bottom) && (left < right)) { |
| 277 | edgeSelected |= MOVE_LEFT; |
| 278 | } |
| 279 | else if ((right <= mTouchTolerance) && ((y + mTouchTolerance) >= cropped.top) |
| 280 | && ((y - mTouchTolerance) <= cropped.bottom)) { |
| 281 | edgeSelected |= MOVE_RIGHT; |
| 282 | } |
| 283 | |
| 284 | // Check top or bottom. |
| 285 | if ((top <= mTouchTolerance) && ((x + mTouchTolerance) >= cropped.left) |
| 286 | && ((x - mTouchTolerance) <= cropped.right) && (top < bottom)) { |
| 287 | edgeSelected |= MOVE_TOP; |
| 288 | } |
| 289 | else if ((bottom <= mTouchTolerance) && ((x + mTouchTolerance) >= cropped.left) |
| 290 | && ((x - mTouchTolerance) <= cropped.right)) { |
| 291 | edgeSelected |= MOVE_BOTTOM; |
| 292 | } |
| 293 | return edgeSelected; |
| 294 | } |
| 295 | |
| 296 | private static RectF fixedCornerResize(RectF r, int moving_corner, float dx, float dy) { |
| 297 | RectF newCrop = null; |
| 298 | // Fix opposite corner in place and move sides |
| 299 | if (moving_corner == BOTTOM_RIGHT) { |
| 300 | newCrop = new RectF(r.left, r.top, r.left + r.width() + dx, r.top + r.height() |
| 301 | + dy); |
| 302 | } else if (moving_corner == BOTTOM_LEFT) { |
| 303 | newCrop = new RectF(r.right - r.width() + dx, r.top, r.right, r.top + r.height() |
| 304 | + dy); |
| 305 | } else if (moving_corner == TOP_LEFT) { |
| 306 | newCrop = new RectF(r.right - r.width() + dx, r.bottom - r.height() + dy, |
| 307 | r.right, r.bottom); |
| 308 | } else if (moving_corner == TOP_RIGHT) { |
| 309 | newCrop = new RectF(r.left, r.bottom - r.height() + dy, r.left |
| 310 | + r.width() + dx, r.bottom); |
| 311 | } |
| 312 | return newCrop; |
| 313 | } |
| 314 | |
| 315 | private static int fixEdgeToCorner(int moving_edges) { |
| 316 | if (moving_edges == MOVE_LEFT) { |
| 317 | moving_edges |= MOVE_TOP; |
| 318 | } |
| 319 | if (moving_edges == MOVE_TOP) { |
| 320 | moving_edges |= MOVE_LEFT; |
| 321 | } |
| 322 | if (moving_edges == MOVE_RIGHT) { |
| 323 | moving_edges |= MOVE_BOTTOM; |
| 324 | } |
| 325 | if (moving_edges == MOVE_BOTTOM) { |
| 326 | moving_edges |= MOVE_RIGHT; |
| 327 | } |
| 328 | return moving_edges; |
| 329 | } |
| 330 | |
| 331 | } |