package com.js.photosdk.operate;
import java.util.ArrayList;
import java.util.List;
import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.Canvas;
import android.graphics.Paint;
import android.graphics.Point;
import android.graphics.Rect;
import android.view.MotionEvent;
import android.view.View;
public class OperateView extends View
{
private List<ImageObject> imgLists = new ArrayList<ImageObject>();
private Rect mCanvasLimits;
private Bitmap bgBmp;
private Paint paint = new Paint();
// private Context mContext;
private boolean isMultiAdd;// true 代表可以添加多个水印图片（或文字），false 代表只可添加单个水印图片（或文字）
private float picScale = 0.4f;
/**
* 设置水印图片初始化大小
* @param picScale
*/
public void setPicScale(float picScale)
{
this.picScale = picScale;
}
/**
* 设置是否可以添加多个图片或者文字对象
*
* @param isMultiAdd
* true 代表可以添加多个水印图片（或文字），false 代表只可添加单个水印图片（或文字）
*/
public void setMultiAdd(boolean isMultiAdd)
{
this.isMultiAdd = isMultiAdd;
}
public OperateView(Context context, Bitmap resizeBmp)
{
super(context);
// this.mContext = context;
bgBmp = resizeBmp;
int width = bgBmp.getWidth();
int height = bgBmp.getHeight();
mCanvasLimits = new Rect(0, 0, width, height);
}
/**
* 将图片对象添加到View中
*
* @param imgObj
* 图片对象
*/
public void addItem(ImageObject imgObj)
{
if (imgObj == null)
{
return;
}
if (!isMultiAdd && imgLists != null)
{
imgLists.clear();
}
imgObj.setSelected(true);
if (!imgObj.isTextObject)
{
imgObj.setScale(picScale);
}
ImageObject tempImgObj = null;
for (int i = 0; i < imgLists.size(); i++)
{
tempImgObj = imgLists.get(i);
tempImgObj.setSelected(false);
}
imgLists.add(imgObj);
invalidate();
}
/**
* 画出容器内所有的图像
*/
@Override
protected void onDraw(Canvas canvas)
{
super.onDraw(canvas);
int sc = canvas.save();
canvas.clipRect(mCanvasLimits);
canvas.drawBitmap(bgBmp, 0, 0, paint);
drawImages(canvas);
canvas.restoreToCount(sc);
for (ImageObject ad : imgLists)
{
if (ad != null && ad.isSelected())
{
ad.drawIcon(canvas);
}
}
}
public void save()
{
ImageObject io = getSelected();
if (io != null)
{
io.setSelected(false);
}
invalidate();
}
/**
* 根据触控点重绘View
*/
@Override
public boolean onTouchEvent(MotionEvent event)
{
if (event.getPointerCount() == 1)
{
handleSingleTouchManipulateEvent(event);
} else
{
handleMultiTouchManipulateEvent(event);
}
invalidate();
super.onTouchEvent(event);
return true;
}
private boolean mMovedSinceDown = false;
private boolean mResizeAndRotateSinceDown = false;
private float mStartDistance = 0.0f;
private float mStartScale = 0.0f;
private float mStartRot = 0.0f;
private float mPrevRot = 0.0f;
static public final double ROTATION_STEP = 2.0;
static public final double ZOOM_STEP = 0.01;
static public final float CANVAS_SCALE_MIN = 0.25f;
static public final float CANVAS_SCALE_MAX = 3.0f;
private Point mPreviousPos = new Point(0, 0); // single touch events
float diff;
float rot;
/**
* 多点触控操作
*
* @param event
*/
private void handleMultiTouchManipulateEvent(MotionEvent event)
{
switch (event.getAction() & MotionEvent.ACTION_MASK)
{
case MotionEvent.ACTION_POINTER_UP :
break;
case MotionEvent.ACTION_POINTER_DOWN :
float x1 = event.getX(0);
float x2 = event.getX(1);
float y1 = event.getY(0);
float y2 = event.getY(1);
float delX = (x2 - x1);
float delY = (y2 - y1);
diff = (float) Math.sqrt((delX * delX + delY * delY));
mStartDistance = diff;
// float q = (delX / delY);
mPrevRot = (float) Math.toDegrees(Math.atan2(delX, delY));
for (ImageObject io : imgLists)
{
if (io.isSelected())
{
mStartScale = io.getScale();
mStartRot = io.getRotation();
break;
}
}
break;
case MotionEvent.ACTION_MOVE :
x1 = event.getX(0);
x2 = event.getX(1);
y1 = event.getY(0);
y2 = event.getY(1);
delX = (x2 - x1);
delY = (y2 - y1);
diff = (float) Math.sqrt((delX * delX + delY * delY));
float scale = diff / mStartDistance;
float newscale = mStartScale * scale;
rot = (float) Math.toDegrees(Math.atan2(delX, delY));
float rotdiff = mPrevRot - rot;
for (ImageObject io : imgLists)
{
if (io.isSelected() && newscale < 10.0f && newscale > 0.1f)
{
float newrot = Math.round((mStartRot + rotdiff) / 1.0f);
if (Math.abs((newscale - io.getScale()) * ROTATION_STEP) > Math
.abs(newrot - io.getRotation()))
{
io.setScale(newscale);
} else
{
io.setRotation(newrot % 360);
}
break;
}
}
break;
}
}
/**
* 获取选中的对象ImageObject
*
* @return
*/
private ImageObject getSelected()
{
for (ImageObject ibj : imgLists)
{
if (ibj.isSelected())
{
return ibj;
}
}
return null;
}
private long selectTime = 0;
/**
* 单点触控操作
*
* @param event
*/
private void handleSingleTouchManipulateEvent(MotionEvent event)
{
long currentTime = 0;
switch (event.getAction())
{
case MotionEvent.ACTION_DOWN :
mMovedSinceDown = false;
mResizeAndRotateSinceDown = false;
int selectedId = -1;
for (int i = imgLists.size() - 1; i >= 0; --i)
{
ImageObject io = imgLists.get(i);
if (io.contains(event.getX(), event.getY())
|| io.pointOnCorner(event.getX(), event.getY(),
OperateConstants.RIGHTBOTTOM)
|| io.pointOnCorner(event.getX(), event.getY(),
OperateConstants.LEFTTOP))
{
io.setSelected(true);
imgLists.remove(i);
imgLists.add(io);
selectedId = imgLists.size() - 1;
currentTime = System.currentTimeMillis();
if (currentTime - selectTime < 300)
{
if (myListener != null)
{
if (getSelected().isTextObject())
{
myListener
.onClick((TextObject) getSelected());
}
}
}
selectTime = currentTime;
break;
}
}
if (selectedId < 0)
{
for (int i = imgLists.size() - 1; i >= 0; --i)
{
ImageObject io = imgLists.get(i);
if (io.contains(event.getX(), event.getY())
|| io.pointOnCorner(event.getX(), event.getY(),
OperateConstants.RIGHTBOTTOM)
|| io.pointOnCorner(event.getX(), event.getY(),
OperateConstants.LEFTTOP))
{
io.setSelected(true);
imgLists.remove(i);
imgLists.add(io);
selectedId = imgLists.size() - 1;
break;
}
}
}
for (int i = 0; i < imgLists.size(); ++i)
{
ImageObject io = imgLists.get(i);
if (i != selectedId)
{
io.setSelected(false);
}
}
ImageObject io = getSelected();
if (io != null)
{
if (io.pointOnCorner(event.getX(), event.getY(),
OperateConstants.LEFTTOP))
{
imgLists.remove(io);
} else if (io.pointOnCorner(event.getX(), event.getY(),
OperateConstants.RIGHTBOTTOM))
{
mResizeAndRotateSinceDown = true;
float x = event.getX();
float y = event.getY();
float delX = x - io.getPoint().x;
float delY = y - io.getPoint().y;
diff = (float) Math.sqrt((delX * delX + delY * delY));
mStartDistance = diff;
mPrevRot = (float) Math.toDegrees(Math
.atan2(delX, delY));
mStartScale = io.getScale();
mStartRot = io.getRotation();
} else if (io.contains(event.getX(), event.getY()))
{
mMovedSinceDown = true;
mPreviousPos.x = (int) event.getX();
mPreviousPos.y = (int) event.getY();
}
}
break;
case MotionEvent.ACTION_UP :
mMovedSinceDown = false;
mResizeAndRotateSinceDown = false;
break;
case MotionEvent.ACTION_MOVE :
// Log.i("jarlen"," 移动了");
// 移动
if (mMovedSinceDown)
{
int curX = (int) event.getX();
int curY = (int) event.getY();
int diffX = curX - mPreviousPos.x;
int diffY = curY - mPreviousPos.y;
mPreviousPos.x = curX;
mPreviousPos.y = curY;
io = getSelected();
Point p = io.getPosition();
int x = p.x + diffX;
int y = p.y + diffY;
if (p.x + diffX >= mCanvasLimits.left
&& p.x + diffX <= mCanvasLimits.right
&& p.y + diffY >= mCanvasLimits.top
&& p.y + diffY <= mCanvasLimits.bottom)
io.moveBy((int) (diffX), (int) (diffY));
}
// 旋转和缩放
if (mResizeAndRotateSinceDown)
{
io = getSelected();
float x = event.getX();
float y = event.getY();
float delX = x - io.getPoint().x;
float delY = y - io.getPoint().y;
diff = (float) Math.sqrt((delX * delX + delY * delY));
float scale = diff / mStartDistance;
float newscale = mStartScale * scale;
rot = (float) Math.toDegrees(Math.atan2(delX, delY));
float rotdiff = mPrevRot - rot;
if (newscale < 10.0f && newscale > 0.1f)
{
float newrot = Math.round((mStartRot + rotdiff) / 1.0f);
if (Math.abs((newscale - io.getScale()) * ROTATION_STEP) > Math
.abs(newrot - io.getRotation()))
{
io.setScale(newscale);
} else
{
io.setRotation(newrot % 360);
}
}
}
break;
}
cancelLongPress();
}
/**
* 循环画图像
*
* @param canvas
*/
private void drawImages(Canvas canvas)
{
for (ImageObject ad : imgLists)
{
if (ad != null)
{
ad.draw(canvas);
}
}
}
/**
* 向外部提供双击监听事件（双击弹出自定义对话框编辑文字）
*/
MyListener myListener;
public void setOnListener(MyListener myListener)
{
this.myListener = myListener;
}
public interface MyListener
{
public void onClick(TextObject tObject);
}
}