| /* |
| * 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.crop; |
| |
| import android.graphics.Rect; |
| import android.graphics.RectF; |
| |
| import com.android.gallery3d.filtershow.imageshow.GeometryMath; |
| |
| public class CropObject { |
| |
| private BoundedRect mBoundedRect; |
| private float mAspectWidth = 1; |
| private float mAspectHeight = 1; |
| private boolean mFixAspectRatio = false; |
| private float mRotation = 0; |
| private float mTouchTolerance = 45; |
| private float mMinSideSize = 20; |
| |
| public static final int MOVE_NONE = 0; |
| // Sides |
| public static final int MOVE_LEFT = 1; |
| public static final int MOVE_TOP = 2; |
| public static final int MOVE_RIGHT = 4; |
| public static final int MOVE_BOTTOM = 8; |
| public static final int MOVE_BLOCK = 16; |
| |
| // Corners |
| public static final int TOP_LEFT = MOVE_TOP | MOVE_LEFT; |
| public static final int TOP_RIGHT = MOVE_TOP | MOVE_RIGHT; |
| public static final int BOTTOM_RIGHT = MOVE_BOTTOM | MOVE_RIGHT; |
| public static final int BOTTOM_LEFT = MOVE_BOTTOM | MOVE_LEFT; |
| |
| private int mMovingEdges = MOVE_NONE; |
| |
| public CropObject(Rect outerBound, Rect innerBound, int outerAngle) { |
| mBoundedRect = new BoundedRect(outerAngle % 360, outerBound, innerBound); |
| } |
| |
| public CropObject(RectF outerBound, RectF innerBound, int outerAngle) { |
| mBoundedRect = new BoundedRect(outerAngle % 360, outerBound, innerBound); |
| } |
| |
| public void setToInnerBounds(RectF r) { |
| mBoundedRect.setToInner(r); |
| } |
| |
| public void setToOuterBounds(RectF r) { |
| mBoundedRect.setToOuter(r); |
| } |
| |
| public RectF getInnerBounds() { |
| return mBoundedRect.getInner(); |
| } |
| |
| public RectF getOuterBounds() { |
| return mBoundedRect.getOuter(); |
| } |
| |
| public int getSelectState() { |
| return mMovingEdges; |
| } |
| |
| public boolean isFixedAspect() { |
| return mFixAspectRatio; |
| } |
| |
| public void rotateOuter(int angle) { |
| mRotation = angle % 360; |
| mBoundedRect.setRotation(mRotation); |
| clearSelectState(); |
| } |
| |
| public boolean setInnerAspectRatio(int width, int height) { |
| if (width <= 0 || height <= 0) { |
| throw new IllegalArgumentException("Width and Height must be greater than zero"); |
| } |
| RectF inner = mBoundedRect.getInner(); |
| CropMath.fixAspectRatioContained(inner, width, height); |
| if (inner.width() < mMinSideSize || inner.height() < mMinSideSize) { |
| return false; |
| } |
| mAspectWidth = width; |
| mAspectHeight = height; |
| mFixAspectRatio = true; |
| mBoundedRect.setInner(inner); |
| clearSelectState(); |
| return true; |
| } |
| |
| public void setTouchTolerance(float tolerance) { |
| if (tolerance <= 0) { |
| throw new IllegalArgumentException("Tolerance must be greater than zero"); |
| } |
| mTouchTolerance = tolerance; |
| } |
| |
| public void setMinInnerSideSize(float minSide) { |
| if (minSide <= 0) { |
| throw new IllegalArgumentException("Min dide must be greater than zero"); |
| } |
| mMinSideSize = minSide; |
| } |
| |
| public void unsetAspectRatio() { |
| mFixAspectRatio = false; |
| clearSelectState(); |
| } |
| |
| public boolean hasSelectedEdge() { |
| return mMovingEdges != MOVE_NONE; |
| } |
| |
| public static boolean checkCorner(int selected) { |
| return selected == TOP_LEFT || selected == TOP_RIGHT || selected == BOTTOM_RIGHT |
| || selected == BOTTOM_LEFT; |
| } |
| |
| public static boolean checkEdge(int selected) { |
| return selected == MOVE_LEFT || selected == MOVE_TOP || selected == MOVE_RIGHT |
| || selected == MOVE_BOTTOM; |
| } |
| |
| public static boolean checkBlock(int selected) { |
| return selected == MOVE_BLOCK; |
| } |
| |
| public static boolean checkValid(int selected) { |
| return selected == MOVE_NONE || checkBlock(selected) || checkEdge(selected) |
| || checkCorner(selected); |
| } |
| |
| public void clearSelectState() { |
| mMovingEdges = MOVE_NONE; |
| } |
| |
| public int wouldSelectEdge(float x, float y) { |
| int edgeSelected = calculateSelectedEdge(x, y); |
| if (edgeSelected != MOVE_NONE && edgeSelected != MOVE_BLOCK) { |
| return edgeSelected; |
| } |
| return MOVE_NONE; |
| } |
| |
| public boolean selectEdge(int edge) { |
| if (!checkValid(edge)) { |
| // temporary |
| throw new IllegalArgumentException("bad edge selected"); |
| // return false; |
| } |
| if ((mFixAspectRatio && !checkCorner(edge)) && !checkBlock(edge)) { |
| // temporary |
| throw new IllegalArgumentException("bad corner selected"); |
| // return false; |
| } |
| mMovingEdges = edge; |
| return true; |
| } |
| |
| public boolean selectEdge(float x, float y) { |
| int edgeSelected = calculateSelectedEdge(x, y); |
| if (mFixAspectRatio) { |
| edgeSelected = fixEdgeToCorner(edgeSelected); |
| } |
| if (edgeSelected == MOVE_NONE) { |
| return false; |
| } |
| return selectEdge(edgeSelected); |
| } |
| |
| public boolean moveCurrentSelection(float dX, float dY) { |
| if (mMovingEdges == MOVE_NONE) { |
| return false; |
| } |
| RectF crop = mBoundedRect.getInner(); |
| |
| float minWidthHeight = mMinSideSize; |
| |
| int movingEdges = mMovingEdges; |
| if (movingEdges == MOVE_BLOCK) { |
| mBoundedRect.moveInner(dX, dY); |
| return true; |
| } else { |
| float dx = 0; |
| float dy = 0; |
| |
| if ((movingEdges & MOVE_LEFT) != 0) { |
| dx = Math.min(crop.left + dX, crop.right - minWidthHeight) - crop.left; |
| } |
| if ((movingEdges & MOVE_TOP) != 0) { |
| dy = Math.min(crop.top + dY, crop.bottom - minWidthHeight) - crop.top; |
| } |
| if ((movingEdges & MOVE_RIGHT) != 0) { |
| dx = Math.max(crop.right + dX, crop.left + minWidthHeight) |
| - crop.right; |
| } |
| if ((movingEdges & MOVE_BOTTOM) != 0) { |
| dy = Math.max(crop.bottom + dY, crop.top + minWidthHeight) |
| - crop.bottom; |
| } |
| |
| if (mFixAspectRatio) { |
| float[] l1 = { |
| crop.left, crop.bottom |
| }; |
| float[] l2 = { |
| crop.right, crop.top |
| }; |
| if (movingEdges == TOP_LEFT || movingEdges == BOTTOM_RIGHT) { |
| l1[1] = crop.top; |
| l2[1] = crop.bottom; |
| } |
| float[] b = { |
| l1[0] - l2[0], l1[1] - l2[1] |
| }; |
| float[] disp = { |
| dx, dy |
| }; |
| float[] bUnit = GeometryMath.normalize(b); |
| float sp = GeometryMath.scalarProjection(disp, bUnit); |
| dx = sp * bUnit[0]; |
| dy = sp * bUnit[1]; |
| RectF newCrop = fixedCornerResize(crop, movingEdges, dx, dy); |
| |
| mBoundedRect.fixedAspectResizeInner(newCrop); |
| } else { |
| if ((movingEdges & MOVE_LEFT) != 0) { |
| crop.left += dx; |
| } |
| if ((movingEdges & MOVE_TOP) != 0) { |
| crop.top += dy; |
| } |
| if ((movingEdges & MOVE_RIGHT) != 0) { |
| crop.right += dx; |
| } |
| if ((movingEdges & MOVE_BOTTOM) != 0) { |
| crop.bottom += dy; |
| } |
| mBoundedRect.resizeInner(crop); |
| } |
| } |
| return true; |
| } |
| |
| // Helper methods |
| |
| private int calculateSelectedEdge(float x, float y) { |
| RectF cropped = mBoundedRect.getInner(); |
| |
| float left = Math.abs(x - cropped.left); |
| float right = Math.abs(x - cropped.right); |
| float top = Math.abs(y - cropped.top); |
| float bottom = Math.abs(y - cropped.bottom); |
| |
| int edgeSelected = MOVE_NONE; |
| // Check left or right. |
| if ((left <= mTouchTolerance) && ((y + mTouchTolerance) >= cropped.top) |
| && ((y - mTouchTolerance) <= cropped.bottom) && (left < right)) { |
| edgeSelected |= MOVE_LEFT; |
| } |
| else if ((right <= mTouchTolerance) && ((y + mTouchTolerance) >= cropped.top) |
| && ((y - mTouchTolerance) <= cropped.bottom)) { |
| edgeSelected |= MOVE_RIGHT; |
| } |
| |
| // Check top or bottom. |
| if ((top <= mTouchTolerance) && ((x + mTouchTolerance) >= cropped.left) |
| && ((x - mTouchTolerance) <= cropped.right) && (top < bottom)) { |
| edgeSelected |= MOVE_TOP; |
| } |
| else if ((bottom <= mTouchTolerance) && ((x + mTouchTolerance) >= cropped.left) |
| && ((x - mTouchTolerance) <= cropped.right)) { |
| edgeSelected |= MOVE_BOTTOM; |
| } |
| return edgeSelected; |
| } |
| |
| private static RectF fixedCornerResize(RectF r, int moving_corner, float dx, float dy) { |
| RectF newCrop = null; |
| // Fix opposite corner in place and move sides |
| if (moving_corner == BOTTOM_RIGHT) { |
| newCrop = new RectF(r.left, r.top, r.left + r.width() + dx, r.top + r.height() |
| + dy); |
| } else if (moving_corner == BOTTOM_LEFT) { |
| newCrop = new RectF(r.right - r.width() + dx, r.top, r.right, r.top + r.height() |
| + dy); |
| } else if (moving_corner == TOP_LEFT) { |
| newCrop = new RectF(r.right - r.width() + dx, r.bottom - r.height() + dy, |
| r.right, r.bottom); |
| } else if (moving_corner == TOP_RIGHT) { |
| newCrop = new RectF(r.left, r.bottom - r.height() + dy, r.left |
| + r.width() + dx, r.bottom); |
| } |
| return newCrop; |
| } |
| |
| private static int fixEdgeToCorner(int moving_edges) { |
| if (moving_edges == MOVE_LEFT) { |
| moving_edges |= MOVE_TOP; |
| } |
| if (moving_edges == MOVE_TOP) { |
| moving_edges |= MOVE_LEFT; |
| } |
| if (moving_edges == MOVE_RIGHT) { |
| moving_edges |= MOVE_BOTTOM; |
| } |
| if (moving_edges == MOVE_BOTTOM) { |
| moving_edges |= MOVE_RIGHT; |
| } |
| return moving_edges; |
| } |
| |
| } |