/*
* 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.
*/
package eu.janmuller.android.simplecropimage;
import android.graphics.Canvas;
import android.graphics.Matrix;
import android.graphics.Paint;
import android.graphics.Path;
import android.graphics.Rect;
import android.graphics.RectF;
import android.graphics.Region;
import android.graphics.drawable.Drawable;
import android.view.View;
import de.theknut.xposedgelsettings.R;
import de.theknut.xposedgelsettings.hooks.Utils;
// This class is used by CropImage to display a highlighted cropping rectangle
// overlayed with the image. There are two coordinate spaces in use. One is
// image, another is screen. computeLayout() uses mMatrix to map from image
// space to screen space.
class HighlightView {
@SuppressWarnings("unused")
private static final String TAG = "HighlightView";
View mContext; // The View displaying the image.
public static final int GROW_NONE = (1 << 0);
public static final int GROW_LEFT_EDGE = (1 << 1);
public static final int GROW_RIGHT_EDGE = (1 << 2);
public static final int GROW_TOP_EDGE = (1 << 3);
public static final int GROW_BOTTOM_EDGE = (1 << 4);
public static final int MOVE = (1 << 5);
public HighlightView(View ctx) {
mContext = ctx;
}
private void init() {
android.content.res.Resources resources = mContext.getResources();
mResizeDrawable = resources.getDrawable(R.drawable.crop_resize_drawable);
}
boolean mIsFocused;
boolean mHidden;
public boolean hasFocus() {
return mIsFocused;
}
public void setFocus(boolean f) {
mIsFocused = f;
}
public void setHidden(boolean hidden) {
mHidden = hidden;
}
protected void draw(Canvas canvas) {
if (mHidden) {
return;
}
Path path = new Path();
if (!hasFocus()) {
mOutlinePaint.setColor(0xFF000000);
canvas.drawRect(mDrawRect, mOutlinePaint);
} else {
Rect viewDrawingRect = new Rect();
mContext.getDrawingRect(viewDrawingRect);
if (mCircle) {
canvas.save();
float width = mDrawRect.width();
float height = mDrawRect.height();
path.addCircle(mDrawRect.left + (width / 2),
mDrawRect.top + (height / 2),
width / 2,
Path.Direction.CW);
canvas.clipPath(path, Region.Op.DIFFERENCE);
canvas.drawRect(viewDrawingRect, hasFocus() ? mFocusPaint : mNoFocusPaint);
canvas.restore();
} else {
Rect topRect = new Rect(viewDrawingRect.left, viewDrawingRect.top, viewDrawingRect.right, mDrawRect.top);
if (topRect.width() > 0 && topRect.height() > 0) {
canvas.drawRect(topRect, hasFocus() ? mFocusPaint : mNoFocusPaint);
}
Rect bottomRect = new Rect(viewDrawingRect.left, mDrawRect.bottom, viewDrawingRect.right, viewDrawingRect.bottom);
if (bottomRect.width() > 0 && bottomRect.height() > 0) {
canvas.drawRect(bottomRect, hasFocus() ? mFocusPaint : mNoFocusPaint);
}
Rect leftRect = new Rect(viewDrawingRect.left, topRect.bottom, mDrawRect.left, bottomRect.top);
if (leftRect.width() > 0 && leftRect.height() > 0) {
canvas.drawRect(leftRect, hasFocus() ? mFocusPaint : mNoFocusPaint);
}
Rect rightRect = new Rect(mDrawRect.right, topRect.bottom, viewDrawingRect.right, bottomRect.top);
if (rightRect.width() > 0 && rightRect.height() > 0) {
canvas.drawRect(rightRect, hasFocus() ? mFocusPaint : mNoFocusPaint);
}
path.addRect(new RectF(mDrawRect), Path.Direction.CW);
}
mOutlinePaint.setColor(0xFF00BFA5);
canvas.drawPath(path, mOutlinePaint);
int left = mDrawRect.left + 1;
int right = mDrawRect.right + 1;
int top = mDrawRect.top + 4;
int bottom = mDrawRect.bottom + 3;
int width = mResizeDrawable.getIntrinsicWidth() / 2;
int height = mResizeDrawable.getIntrinsicHeight() / 2;
int xMiddle = mDrawRect.left + ((mDrawRect.right - mDrawRect.left) / 2);
int yMiddle = mDrawRect.top + ((mDrawRect.bottom - mDrawRect.top) / 2);
mResizeDrawable.setBounds(left - width,
yMiddle - height,
left + width,
yMiddle + height);
mResizeDrawable.draw(canvas);
mResizeDrawable.setBounds(right - width,
yMiddle - height,
right + width,
yMiddle + height);
mResizeDrawable.draw(canvas);
mResizeDrawable.setBounds(xMiddle - width,
top - height,
xMiddle + width,
top + height);
mResizeDrawable.draw(canvas);
mResizeDrawable.setBounds(xMiddle - width,
bottom - height,
xMiddle + width,
bottom + height);
mResizeDrawable.draw(canvas);
}
}
public ModifyMode getMode() {
return mMode;
}
public void setMode(ModifyMode mode) {
if (mode != mMode) {
mMode = mode;
mContext.invalidate();
}
}
// Determines which edges are hit by touching at (x, y).
public int getHit(float x, float y) {
Rect r = computeLayout();
final float hysteresis = 20F;
int retval = GROW_NONE;
if (mCircle) {
float distX = x - r.centerX();
float distY = y - r.centerY();
int distanceFromCenter =
(int) Math.sqrt(distX * distX + distY * distY);
int radius = mDrawRect.width() / 2;
int delta = distanceFromCenter - radius;
if (Math.abs(delta) <= hysteresis) {
if (Math.abs(distY) > Math.abs(distX)) {
if (distY < 0) {
retval = GROW_TOP_EDGE;
} else {
retval = GROW_BOTTOM_EDGE;
}
} else {
if (distX < 0) {
retval = GROW_LEFT_EDGE;
} else {
retval = GROW_RIGHT_EDGE;
}
}
} else if (distanceFromCenter < radius) {
retval = MOVE;
} else {
retval = GROW_NONE;
}
} else {
// verticalCheck makes sure the position is between the top and
// the bottom edge (with some tolerance). Similar for horizCheck.
boolean verticalCheck = (y >= r.top - hysteresis)
&& (y < r.bottom + hysteresis);
boolean horizCheck = (x >= r.left - hysteresis)
&& (x < r.right + hysteresis);
// Check whether the position is near some edge(s).
if ((Math.abs(r.left - x) < hysteresis) && verticalCheck) {
retval |= GROW_LEFT_EDGE;
}
if ((Math.abs(r.right - x) < hysteresis) && verticalCheck) {
retval |= GROW_RIGHT_EDGE;
}
if ((Math.abs(r.top - y) < hysteresis) && horizCheck) {
retval |= GROW_TOP_EDGE;
}
if ((Math.abs(r.bottom - y) < hysteresis) && horizCheck) {
retval |= GROW_BOTTOM_EDGE;
}
// Not near any edge but inside the rectangle: move.
if (retval == GROW_NONE && r.contains((int) x, (int) y)) {
retval = MOVE;
}
}
return retval;
}
// Handles motion (dx, dy) in screen space.
// The "edge" parameter specifies which edges the user is dragging.
void handleMotion(int edge, float dx, float dy) {
Rect r = computeLayout();
if (edge == GROW_NONE) {
return;
} else if (edge == MOVE) {
// Convert to image space before sending to moveBy().
moveBy(dx * (mCropRect.width() / r.width()),
dy * (mCropRect.height() / r.height()));
} else {
if (((GROW_LEFT_EDGE | GROW_RIGHT_EDGE) & edge) == 0) {
dx = 0;
}
if (((GROW_TOP_EDGE | GROW_BOTTOM_EDGE) & edge) == 0) {
dy = 0;
}
// Convert to image space before sending to growBy().
float xDelta = dx * (mCropRect.width() / r.width());
float yDelta = dy * (mCropRect.height() / r.height());
growBy((((edge & GROW_LEFT_EDGE) != 0) ? -1 : 1) * xDelta,
(((edge & GROW_TOP_EDGE) != 0) ? -1 : 1) * yDelta);
}
}
// Grows the cropping rectange by (dx, dy) in image space.
void moveBy(float dx, float dy) {
Rect invalRect = new Rect(mDrawRect);
mCropRect.offset(dx, dy);
// Put the cropping rectangle inside image rectangle.
mCropRect.offset(
Math.max(0, mImageRect.left - mCropRect.left),
Math.max(0, mImageRect.top - mCropRect.top));
mCropRect.offset(
Math.min(0, mImageRect.right - mCropRect.right),
Math.min(0, mImageRect.bottom - mCropRect.bottom));
mDrawRect = computeLayout();
invalRect.union(mDrawRect);
invalRect.inset(-10, -10);
mContext.invalidate(invalRect);
}
// Grows the cropping rectange by (dx, dy) in image space.
void growBy(float dx, float dy) {
if (mMaintainAspectRatio) {
if (dx != 0) {
dy = dx / mInitialAspectRatio;
} else if (dy != 0) {
dx = dy * mInitialAspectRatio;
}
}
// Don't let the cropping rectangle grow too fast.
// Grow at most half of the difference between the image rectangle and
// the cropping rectangle.
RectF r = new RectF(mCropRect);
if (dx > 0F && r.width() + 2 * dx > mImageRect.width()) {
float adjustment = (mImageRect.width() - r.width()) / 2F;
dx = adjustment;
if (mMaintainAspectRatio) {
dy = dx / mInitialAspectRatio;
}
}
if (dy > 0F && r.height() + 2 * dy > mImageRect.height()) {
float adjustment = (mImageRect.height() - r.height()) / 2F;
dy = adjustment;
if (mMaintainAspectRatio) {
dx = dy * mInitialAspectRatio;
}
}
r.inset(-dx, -dy);
// Don't let the cropping rectangle shrink too fast.
final float widthCap = 25F;
if (r.width() < widthCap) {
r.inset(-(widthCap - r.width()) / 2F, 0F);
}
float heightCap = mMaintainAspectRatio
? (widthCap / mInitialAspectRatio)
: widthCap;
if (r.height() < heightCap) {
r.inset(0F, -(heightCap - r.height()) / 2F);
}
// Put the cropping rectangle inside the image rectangle.
if (r.left < mImageRect.left) {
r.offset(mImageRect.left - r.left, 0F);
} else if (r.right > mImageRect.right) {
r.offset(-(r.right - mImageRect.right), 0);
}
if (r.top < mImageRect.top) {
r.offset(0F, mImageRect.top - r.top);
} else if (r.bottom > mImageRect.bottom) {
r.offset(0F, -(r.bottom - mImageRect.bottom));
}
mCropRect.set(r);
mDrawRect = computeLayout();
mContext.invalidate();
}
// Returns the cropping rectangle in image space.
public Rect getCropRect() {
return new Rect((int) mCropRect.left, (int) mCropRect.top,
(int) mCropRect.right, (int) mCropRect.bottom);
}
// Maps the cropping rectangle from image space to screen space.
private Rect computeLayout() {
RectF r = new RectF(mCropRect.left, mCropRect.top,
mCropRect.right, mCropRect.bottom);
mMatrix.mapRect(r);
return new Rect(Math.round(r.left), Math.round(r.top),
Math.round(r.right), Math.round(r.bottom));
}
public void invalidate() {
mDrawRect = computeLayout();
}
public void setup(Matrix m, Rect imageRect, RectF cropRect, boolean circle, boolean maintainAspectRatio) {
if (circle) {
maintainAspectRatio = true;
}
mMatrix = new Matrix(m);
mCropRect = cropRect;
mImageRect = new RectF(imageRect);
mMaintainAspectRatio = maintainAspectRatio;
mCircle = circle;
mInitialAspectRatio = mCropRect.width() / mCropRect.height();
mDrawRect = computeLayout();
mFocusPaint.setARGB(125, 50, 50, 50);
mNoFocusPaint.setARGB(125, 50, 50, 50);
mOutlinePaint.setStrokeWidth(Utils.dpToPx(2));
mOutlinePaint.setStyle(Paint.Style.STROKE);
mOutlinePaint.setAntiAlias(true);
mMode = ModifyMode.None;
init();
}
enum ModifyMode {None, Move, Grow}
private ModifyMode mMode = ModifyMode.None;
Rect mDrawRect; // in screen space
private RectF mImageRect; // in image space
RectF mCropRect; // in image space
Matrix mMatrix;
private boolean mMaintainAspectRatio = false;
private float mInitialAspectRatio;
private boolean mCircle = false;
private Drawable mResizeDrawable;
private final Paint mFocusPaint = new Paint();
private final Paint mNoFocusPaint = new Paint();
private final Paint mOutlinePaint = new Paint();
}