package com.sohu.myimageeditor.app.widget;
import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.Rect;
import android.graphics.RectF;
import android.util.AttributeSet;
import android.view.MotionEvent;
import android.widget.ImageView;
/**
* Created by wangwang on 14-3-12.
*/
public class CropImageView extends ImageView {
private static final String TAG = CropImageView.class.getSimpleName();
private static final int PRESS_LT = 0;
private static final int PRESS_RT = 1;
private static final int PRESS_RB = 2;
private static final int PRESS_LB = 3;
private static final int REMAIN_AREA_ALPHA = 50 * 255 / 100;
private static final int PRESS_AREA_RADIUS = 36;
private Bitmap mOriginalBitmap;
private Rect mOriginalArea;
private Rect mActualArea;
private Rect mChooseArea;
private Rect mPressLTArea;
private Rect mPressRTArea;
private Rect mPressRBArea;
private Rect mPressLBArea;
private Rect mRemainLeftArea;
private Rect mRemainRightArea;
private Rect mRemainTopArea;
private Rect mRemainBottomArea;
private Paint mChooseAreaPaint;
private Paint mRemainAreaPaint;
private boolean mFirstDrawFlag;
private boolean mTouchCorrectFlag;
private int mPressAreaFlag;
private int mX;
private int mY;
public CropImageView(Context context) {
super(context);
init();
}
public CropImageView(Context context, AttributeSet attrs) {
super(context, attrs);
init();
}
private void init() {
mActualArea = new Rect();
mChooseArea = new Rect();
mPressLTArea = new Rect();
mPressRTArea = new Rect();
mPressRBArea = new Rect();
mPressLBArea = new Rect();
mRemainLeftArea = new Rect();
mRemainRightArea = new Rect();
mRemainTopArea = new Rect();
mRemainBottomArea = new Rect();
mChooseAreaPaint = new Paint();
mRemainAreaPaint = new Paint();
mRemainAreaPaint.setStyle(Paint.Style.FILL);
mRemainAreaPaint.setAlpha(REMAIN_AREA_ALPHA);
mFirstDrawFlag = true;
mTouchCorrectFlag = false;
}
public void setBitmap(Bitmap bitmap) {
mOriginalArea = new Rect(0, 0, bitmap.getWidth(), bitmap.getHeight());
mOriginalBitmap = bitmap.copy(Bitmap.Config.ARGB_8888, true);
setImageBitmap(mOriginalBitmap);
}
@Override
protected void onDraw(Canvas canvas) {
super.onDraw(canvas);
if (mFirstDrawFlag) {
mFirstDrawFlag = false;
imageScale();
}
setRemainArea();
canvas.drawRect(mRemainLeftArea, mRemainAreaPaint);
canvas.drawRect(mRemainRightArea, mRemainAreaPaint);
canvas.drawRect(mRemainTopArea, mRemainAreaPaint);
canvas.drawRect(mRemainBottomArea, mRemainAreaPaint);
mChooseAreaPaint.setColor(Color.WHITE);
mChooseAreaPaint.setStrokeWidth(5.0f);
mChooseAreaPaint.setStyle(Paint.Style.STROKE);
canvas.drawRect(mChooseArea, mChooseAreaPaint);
mChooseAreaPaint.setColor(Color.argb(153, 255, 255, 255));
mChooseAreaPaint.setStrokeWidth(2.0f);
int point1x = (mChooseArea.right - mChooseArea.left) / 3 + mChooseArea.left;
int point1y = mChooseArea.top;
int point2x = (mChooseArea.right - mChooseArea.left) * 2 / 3 + mChooseArea.left;
int point2y = mChooseArea.top;
int point3x = mChooseArea.right;
int point3y = (mChooseArea.bottom - mChooseArea.top) / 3 + mChooseArea.top;
int point4x = mChooseArea.right;
int point4y = (mChooseArea.bottom - mChooseArea.top) * 2 / 3 + mChooseArea.top;
int point5x = point2x;
int point5y = mChooseArea.bottom;
int point6x = point1x;
int point6y = mChooseArea.bottom;
int point7x = mChooseArea.left;
int point7y = point4y;
int point8x = mChooseArea.left;
int point8y = point3y;
canvas.drawLine(point1x, point1y, point6x, point6y, mChooseAreaPaint);
canvas.drawLine(point2x, point2y, point5x, point5y, mChooseAreaPaint);
canvas.drawLine(point8x, point8y, point3x, point3y, mChooseAreaPaint);
canvas.drawLine(point7x, point7y, point4x, point4y, mChooseAreaPaint);
mChooseAreaPaint.setColor(Color.WHITE);
mChooseAreaPaint.setStyle(Paint.Style.FILL);
setPressArea();
canvas.drawOval(new RectF(mPressLTArea), mChooseAreaPaint);
canvas.drawOval(new RectF(mPressRTArea), mChooseAreaPaint);
canvas.drawOval(new RectF(mPressRBArea), mChooseAreaPaint);
canvas.drawOval(new RectF(mPressLBArea), mChooseAreaPaint);
}
@Override
public boolean onTouchEvent(MotionEvent event) {
if (event.getAction() == MotionEvent.ACTION_DOWN) {
mX = (int) event.getX();
mY = (int) event.getY();
if (isInPressArea(mX, mY) || isInChooseArea(mX, mY)) {
mTouchCorrectFlag = true;
return true;
}
}
if (event.getAction() == MotionEvent.ACTION_MOVE && mTouchCorrectFlag) {
if (isMovePressArea((int) event.getX(), (int) event.getY())) {
invalidate();
mX = (int) event.getX();
mY = (int) event.getY();
return true;
}
// mChooseArea == mActualArea
if (mChooseArea.contains(mActualArea)) {
return true;
} else {
moveChooseArea((int) event.getX() - mX, (int) event.getY() - mY);
invalidate();
mX = (int) event.getX();
mY = (int) event.getY();
return true;
}
}
if (event.getAction() == MotionEvent.ACTION_UP) {
mTouchCorrectFlag = false;
mPressAreaFlag = -1;
invalidate();
return true;
}
return super.onTouchEvent(event);
}
private void imageScale() {
if (mOriginalArea == null) {
throw new IllegalStateException("setBitmap() must called before...");
}
RectF temp1 = new RectF(mOriginalArea);
RectF temp2 = new RectF();
getImageMatrix().mapRect(temp2, temp1);
mActualArea.set((int) temp2.left, (int) temp2.top, (int) temp2.right, (int) temp2.bottom);
mChooseArea.set(mActualArea.left + 50, mActualArea.top + 50, mActualArea.right - 50, mActualArea.bottom - 50);
}
private void setRemainArea() {
mRemainLeftArea.set(mActualArea.left, mActualArea.top, mChooseArea.left, mActualArea.bottom);
mRemainRightArea.set(mChooseArea.right, mActualArea.top, mActualArea.right, mActualArea.bottom);
mRemainTopArea.set(mChooseArea.left, mActualArea.top, mChooseArea.right, mChooseArea.top);
mRemainBottomArea.set(mChooseArea.left, mChooseArea.bottom, mChooseArea.right, mActualArea.bottom);
}
private void setPressArea() {
mPressLTArea.set(mChooseArea.left - PRESS_AREA_RADIUS / 2,
mChooseArea.top - PRESS_AREA_RADIUS / 2, mChooseArea.left + PRESS_AREA_RADIUS / 2, mChooseArea.top + PRESS_AREA_RADIUS / 2);
mPressRTArea.set(mChooseArea.right - PRESS_AREA_RADIUS / 2,
mChooseArea.top - PRESS_AREA_RADIUS / 2, mChooseArea.right + PRESS_AREA_RADIUS / 2, mChooseArea.top + PRESS_AREA_RADIUS / 2);
mPressRBArea.set(mChooseArea.right - PRESS_AREA_RADIUS / 2,
mChooseArea.bottom - PRESS_AREA_RADIUS / 2, mChooseArea.right + PRESS_AREA_RADIUS / 2, mChooseArea.bottom + PRESS_AREA_RADIUS / 2);
mPressLBArea.set(mChooseArea.left - PRESS_AREA_RADIUS / 2,
mChooseArea.bottom - PRESS_AREA_RADIUS / 2, mChooseArea.left + PRESS_AREA_RADIUS / 2, mChooseArea.bottom + PRESS_AREA_RADIUS / 2);
}
public boolean isInChooseArea(int x, int y) {
return mChooseArea.contains(x, y);
}
public boolean isInPressArea(int x, int y) {
Rect temp1 = new Rect(mPressLTArea.left - 5, mPressLTArea.top - 5, mPressLTArea.right + 5, mPressLTArea.bottom + 5);
Rect temp2 = new Rect(mPressRTArea.left - 5, mPressRTArea.top - 5, mPressRTArea.right + 5, mPressRTArea.bottom + 5);
Rect temp3 = new Rect(mPressRBArea.left - 5, mPressRBArea.top - 5, mPressRBArea.right + 5, mPressRBArea.bottom + 5);
Rect temp4 = new Rect(mPressLBArea.left - 5, mPressLBArea.top - 5, mPressLBArea.right + 5, mPressLBArea.bottom + 5);
if (temp1.contains(x, y)) {
mPressAreaFlag = PRESS_LT;
return true;
} else if (temp2.contains(x, y)) {
mPressAreaFlag = PRESS_RT;
return true;
} else if (temp3.contains(x, y)) {
mPressAreaFlag = PRESS_RB;
return true;
} else if (temp4.contains(x, y)) {
mPressAreaFlag = PRESS_LB;
return true;
}
return false;
}
private boolean isMovePressArea(int x, int y) {
switch (mPressAreaFlag) {
case PRESS_LT:
pressLTArea(x - mX, y - mY);
break;
case PRESS_RT:
pressRTArea(x - mX, y - mY);
break;
case PRESS_RB:
pressRBArea(x - mX, y - mY);
break;
case PRESS_LB:
pressLBArea(x - mX, y - mY);
break;
default:
return false;
}
return true;
}
private void pressLTArea(int x, int y) {
int left = mChooseArea.left + x;
int right = mChooseArea.right;
int top = mChooseArea.top + y;
int bottom = mChooseArea.bottom;
if (left >= mActualArea.left && left <= mActualArea.right - PRESS_AREA_RADIUS && top >= mActualArea.top && top <= mChooseArea.bottom - PRESS_AREA_RADIUS) {
mChooseArea.set(left, top, right, bottom);
} else {
if (left < mActualArea.left) {
left = mActualArea.left;
}
if (top < mActualArea.top) {
top = mActualArea.top;
}
if (left > mChooseArea.right - PRESS_AREA_RADIUS) {
left = mChooseArea.right - PRESS_AREA_RADIUS;
}
if (top > mChooseArea.bottom - PRESS_AREA_RADIUS) {
top = mChooseArea.bottom - PRESS_AREA_RADIUS;
}
mChooseArea.set(left, top, right, bottom);
}
}
private void pressRTArea(int x, int y) {
int left = mChooseArea.left;
int right = mChooseArea.right + x;
int top = mChooseArea.top + y;
int bottom = mChooseArea.bottom;
if (right <= mActualArea.right && right >= mChooseArea.left + PRESS_AREA_RADIUS && top >= mActualArea.top && top <= mChooseArea.bottom - PRESS_AREA_RADIUS) {
mChooseArea.set(left, top, right, bottom);
} else {
if (right > mActualArea.right) {
right = mActualArea.right;
}
if (top < mActualArea.top) {
top = mActualArea.top;
}
if (right < mChooseArea.left + PRESS_AREA_RADIUS) {
right = (mChooseArea.left + PRESS_AREA_RADIUS);
}
if (top > mChooseArea.bottom - PRESS_AREA_RADIUS) {
top = (mChooseArea.bottom - PRESS_AREA_RADIUS);
}
mChooseArea.set(left, top, right, bottom);
}
}
private void pressRBArea(int x, int y) {
int left = mChooseArea.left;
int right = mChooseArea.right + x;
int top = mChooseArea.top;
int bottom = mChooseArea.bottom + y;
if (right <= mActualArea.right && left >= mChooseArea.left + PRESS_AREA_RADIUS && bottom <= mActualArea.bottom && bottom >= mChooseArea.top + PRESS_AREA_RADIUS) {
mChooseArea.set(left, top, right, bottom);
} else {
if (right > mActualArea.right) {
right = mActualArea.right;
}
if (bottom > mActualArea.bottom) {
bottom = mActualArea.bottom;
}
if (right < mChooseArea.left + PRESS_AREA_RADIUS) {
right = mChooseArea.left + PRESS_AREA_RADIUS;
}
if (bottom < mChooseArea.top + PRESS_AREA_RADIUS) {
bottom = mChooseArea.top + PRESS_AREA_RADIUS;
}
mChooseArea.set(left, top, right, bottom);
}
}
private void pressLBArea(int x, int y) {
int left = mChooseArea.left + x;
int right = mChooseArea.right;
int top = mChooseArea.top;
int bottom = mChooseArea.bottom + y;
if (left >= mActualArea.left && left <= mChooseArea.right - PRESS_AREA_RADIUS && bottom <= mActualArea.bottom && bottom >= mChooseArea.top + PRESS_AREA_RADIUS) {
mChooseArea.set(left, top, right, bottom);
} else {
if (left < mActualArea.left) {
left = mActualArea.left;
}
if (bottom > mActualArea.bottom) {
bottom = mActualArea.bottom;
}
if (left > mChooseArea.right - PRESS_AREA_RADIUS) {
left = mChooseArea.right - PRESS_AREA_RADIUS;
}
if (bottom < mChooseArea.top + PRESS_AREA_RADIUS) {
bottom = mChooseArea.top + PRESS_AREA_RADIUS;
}
mChooseArea.set(left, top, right, bottom);
}
}
public void moveChooseArea(int x, int y) {
int left = mChooseArea.left + x;
int right = mChooseArea.right + x;
int top = mChooseArea.top + y;
int bottom = mChooseArea.bottom + y;
if (mActualArea.contains(left, top, right, bottom)) {
} else {
if (left < mActualArea.left) {
left = mActualArea.left;
right = mChooseArea.right;
}
if (right > mActualArea.right) {
right = mActualArea.right;
left = mChooseArea.left;
}
if (top < mActualArea.top) {
top = mActualArea.top;
bottom = mChooseArea.bottom;
}
if (bottom > mActualArea.bottom) {
bottom = mActualArea.bottom;
top = mChooseArea.top;
}
}
mChooseArea.set(left, top, right, bottom);
}
public Bitmap getCropBitmap() {
float ratioWidth = mOriginalBitmap.getWidth() / (float) (mActualArea.right - mActualArea.left);
float ratioHeight = mOriginalBitmap.getHeight() / (float) (mActualArea.bottom - mActualArea.top);
int left = (int) ((mChooseArea.left - mActualArea.left) * ratioWidth);
int right = (int) (left + (mChooseArea.right - mChooseArea.left) * ratioWidth);
int top = (int) ((mChooseArea.top - mActualArea.top) * ratioHeight);
int bottom = (int) (top + (mChooseArea.bottom - mChooseArea.top) * ratioHeight);
return Bitmap.createBitmap(mOriginalBitmap, left, top, right - left, bottom - top);
}
public void cropBitmap() {
mFirstDrawFlag = true;
mTouchCorrectFlag = false;
setBitmap(getCropBitmap());
}
public void reset() {
mFirstDrawFlag = true;
mTouchCorrectFlag = false;
}
}
