/*
* 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 cn.walcl.ulauncher;
import android.content.Context;
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.MotionEvent;
import android.view.View;
// 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 ResizeViewHandler extends View {
public ResizeViewHandler(Context context) {
super(context);
}
@SuppressWarnings("unused")
private static final String TAG = "HighlightView";
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);
private void init() {
android.content.res.Resources resources = getResources();
mResizeDrawableWidth =
resources.getDrawable(R.drawable.camera_crop_width);
mResizeDrawableHeight =
resources.getDrawable(R.drawable.camera_crop_height);
mResizeDrawableDiagonal =
resources.getDrawable(R.drawable.indicator_autocrop);
}
boolean mIsFocused;
boolean mHidden;
@Override
public boolean hasFocus() {
return mIsFocused;
}
public void setFocus(boolean f) {
mIsFocused = f;
}
public void setHidden(boolean hidden) {
mHidden = hidden;
}
@Override
public void draw(Canvas canvas) {
if (mHidden) {
return;
}
canvas.save();
Path path = new Path();
Rect viewDrawingRect = new Rect();
getDrawingRect(viewDrawingRect);
if (mCircle) {
float width = mDrawRect.width();
float height = mDrawRect.height();
path.addCircle(mDrawRect.left + (width / 2),
mDrawRect.top + (height / 2),
width / 2,
Path.Direction.CW);
mOutlinePaint.setColor(0xFFEF04D6);
} else {
path.addRect(new RectF(mDrawRect), Path.Direction.CW);
mOutlinePaint.setColor(0xFFFF8A00);
}
canvas.clipPath(path, Region.Op.DIFFERENCE);
canvas.drawRect(viewDrawingRect,mNoFocusPaint);
if(mCollision){
canvas.clipPath(path, Region.Op.REVERSE_DIFFERENCE);
canvas.drawRect(viewDrawingRect,mFocusPaint);
}
canvas.restore();
canvas.drawPath(path, mOutlinePaint);
if (mCircle) {
int width = mResizeDrawableDiagonal.getIntrinsicWidth();
int height = mResizeDrawableDiagonal.getIntrinsicHeight();
int d = (int) Math.round(Math.cos(/*45deg*/Math.PI / 4D)
* (mDrawRect.width() / 2D));
int x = mDrawRect.left
+ (mDrawRect.width() / 2) + d - width / 2;
int y = mDrawRect.top
+ (mDrawRect.height() / 2) - d - height / 2;
mResizeDrawableDiagonal.setBounds(x, y,
x + mResizeDrawableDiagonal.getIntrinsicWidth(),
y + mResizeDrawableDiagonal.getIntrinsicHeight());
mResizeDrawableDiagonal.draw(canvas);
} else {
int left = mDrawRect.left + 1;
int right = mDrawRect.right + 1;
int top = mDrawRect.top + 4;
int bottom = mDrawRect.bottom + 3;
int widthWidth =
mResizeDrawableWidth.getIntrinsicWidth() / 2;
int widthHeight =
mResizeDrawableWidth.getIntrinsicHeight() / 2;
int heightHeight =
mResizeDrawableHeight.getIntrinsicHeight() / 2;
int heightWidth =
mResizeDrawableHeight.getIntrinsicWidth() / 2;
int xMiddle = mDrawRect.left
+ ((mDrawRect.right - mDrawRect.left) / 2);
int yMiddle = mDrawRect.top
+ ((mDrawRect.bottom - mDrawRect.top) / 2);
mResizeDrawableWidth.setBounds(left - widthWidth,
yMiddle - widthHeight,
left + widthWidth,
yMiddle + widthHeight);
mResizeDrawableWidth.draw(canvas);
mResizeDrawableWidth.setBounds(right - widthWidth,
yMiddle - widthHeight,
right + widthWidth,
yMiddle + widthHeight);
mResizeDrawableWidth.draw(canvas);
mResizeDrawableHeight.setBounds(xMiddle - heightWidth,
top - heightHeight,
xMiddle + heightWidth,
top + heightHeight);
mResizeDrawableHeight.draw(canvas);
mResizeDrawableHeight.setBounds(xMiddle - heightWidth,
bottom - heightHeight,
xMiddle + heightWidth,
bottom + heightHeight);
mResizeDrawableHeight.draw(canvas);
}
}
public void setMode(ModifyMode mode) {
if (mode != mMode) {
mMode = mode;
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);*/
if((edge & GROW_LEFT_EDGE) == GROW_LEFT_EDGE)
growBy(-1*xDelta, 0, true);
else if((edge & GROW_RIGHT_EDGE) == GROW_RIGHT_EDGE)
growBy(1*xDelta, 0, false);
else if((edge & GROW_TOP_EDGE) == GROW_TOP_EDGE)
growBy(0, -1*yDelta, true);
else if((edge & GROW_BOTTOM_EDGE) == GROW_BOTTOM_EDGE)
growBy(0,1*yDelta, false);
}
}
// 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);
invalidate(invalRect);
}
// Grows the cropping rectange by (dx, dy) in image space.
void growBy(float dx, float dy,boolean from) {
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);
if(from){
r.set(r.left-dx, r.top-dy, r.right, r.bottom);
}else{
r.set(r.left, r.top,r.right+dx,r.bottom+dy);
}
if(r.width()<mMinWidth){
r.left=mCropRect.left;
r.right=mCropRect.right;
}
if(r.height()<mMinHeight){
r.top=mCropRect.top;
r.bottom=mCropRect.bottom;
}
// Put the cropping rectangle inside the image rectangle.
if (r.left < mImageRect.left) {
r.left=mImageRect.left;
} else if (r.right > mImageRect.right) {
r.right=mImageRect.right;
}
if (r.top < mImageRect.top) {
r.top=mImageRect.top;
} else if (r.bottom > mImageRect.bottom) {
r.bottom=mImageRect.bottom;
}
mCropRect.set(r);
mDrawRect = computeLayout();
invalidate();
dispatchTriggerEvent(mCropRect);
}
// 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));
}
@Override
public void invalidate() {
mDrawRect = computeLayout();
super.invalidate();
}
public void setup(Matrix m, Rect imageRect, RectF cropRect, boolean circle,
boolean maintainAspectRatio, float minWidth, float minHeight) {
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, 255, 50, 50);
mNoFocusPaint.setARGB(125, 50, 50, 50);
mOutlinePaint.setStrokeWidth(3F);
mOutlinePaint.setStyle(Paint.Style.STROKE);
mOutlinePaint.setAntiAlias(true);
mMode = ModifyMode.None;
mMinWidth=minWidth;
mMinHeight=minHeight;
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 mResizeDrawableWidth;
private Drawable mResizeDrawableHeight;
private Drawable mResizeDrawableDiagonal;
private final Paint mFocusPaint = new Paint();
private final Paint mNoFocusPaint = new Paint();
private final Paint mOutlinePaint = new Paint();
private float mLastX;
private float mLastY;
private int mMotionEdge;
private float mMinWidth=25F;
private float mMinHeight=25F;
private OnSizeChangedListener mOnTriggerListener=null;
private OnSizeChangedListener mOnValidateSizingListener=null;
private boolean mCollision=false;
@Override
public boolean onTouchEvent(MotionEvent event) {
switch (event.getAction()) {
case MotionEvent.ACTION_DOWN:
int edge = getHit(event.getX(), event.getY());
mMotionEdge = edge;
if (edge != GROW_NONE) {
mLastX = event.getX();
mLastY = event.getY();
setMode(
(edge == MOVE)
? ModifyMode.Move
: ModifyMode.Grow);
break;
}
break;
case MotionEvent.ACTION_UP:
setMode(ModifyMode.None);
dispatchValidateSizingRect();
break;
case MotionEvent.ACTION_MOVE:
handleMotion(mMotionEdge,
event.getX() - mLastX,
event.getY() - mLastY);
mLastX = event.getX();
mLastY = event.getY();
break;
}
return true;
}
public void setColliding(boolean colliding){
mCollision=colliding;
}
public void setOnValidateSizingRect(OnSizeChangedListener listener) {
mOnValidateSizingListener = listener;
}
private void dispatchValidateSizingRect() {
if (mOnValidateSizingListener != null) {
mOnValidateSizingListener.onTrigger(mCropRect);
invalidate();
}
}
public void setOnSizeChangedListener(OnSizeChangedListener listener) {
mOnTriggerListener = listener;
}
/**
* Dispatches a trigger event to listener. Ignored if a listener is not set.
* @param whichHandle the handle that triggered the event.
*/
private void dispatchTriggerEvent(RectF r) {
if (mOnTriggerListener != null) {
mOnTriggerListener.onTrigger(r);
}
}
/**
* Interface definition for a callback to be invoked when a resize triggered
* by moving the handlers beyond a threshold.
*/
public interface OnSizeChangedListener {
/**
* Called when the user moves a handle beyond the threshold.
*
* @param r: the resulting Rect
*/
void onTrigger(RectF r);
}
}