android,iphone

最新推荐文章于 2024-07-04 14:20:08 发布

iosdevxing

最新推荐文章于 2024-07-04 14:20:08 发布

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CC 4.0 BY-SA版权

分类专栏： android 文章标签： Canvas 涂鸦 Paint

本文链接：https://blog.youkuaiyun.com/iosdevxing/article/details/83985424

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//基础类
public class Action {
	public int color;

	Action() {
		color=Color.BLACK;
	}

	Action(int color) {
		this.color = color;
	}

	public void draw(Canvas canvas) {
	}

	public void move(float mx,float my){

	}
}


// 点
class MyPoint extends Action {
	public float x;
	public float y;

	MyPoint(float px, float py, int color) {
		super(color);
		this.x = px;
		this.y = py;
	}

	public void draw(Canvas canvas) {
		Paint paint = new Paint();
		paint.setColor(color);
		canvas.drawPoint(x, y, paint);
	}
}


public class Palette extends Activity {
	PaletteView paletteView=null;
@Override
	public boolean onTouchEvent(MotionEvent event) {
		Log.i("", "...onTouchEvent");
		return paletteView.onTouchEvent(event);
	}


@Override
	public void run() {
		while (mLoop) {
			try {
				Thread.sleep(50);
			} catch (InterruptedException e) {
				e.printStackTrace();
			}
			synchronized (mSurfaceHolder) {
				Draw();
				Log.i("View", "..run..");
			}
		}
	}


	// 画主画板
	private void drawMainPallent(Canvas canvas) {
		Log.i("View", "...drawMainPallent...");
		// 设置画笔没有锯齿，空心
		mPaint.setAntiAlias(true);
		mPaint.setStyle(Paint.Style.STROKE);

		// 画板绘图区背景图片
		canvas.drawBitmap(bgBitmap, bgBitmapX, bgBitmapY, null);

		newbit=Bitmap.createBitmap(bgBitmapWidth, bgBitmapHeight,
				Config.ARGB_4444);
		Canvas canvasTemp = new Canvas(newbit);
		canvasTemp.drawColor(Color.TRANSPARENT);

		for(int i=0;i<=currentPaintIndex;i++){
			actionList.get(i).draw(canvasTemp);
		}
		// 画当前画笔痕迹
		if (curAction != null) {
			curAction.draw(canvasTemp);
		}

		// 在主画板上绘制临时画布上的图像
		canvas.drawBitmap(newbit, bgBitmapX, bgBitmapY, null);
		// 画板绘图区边框
		mPaint.setColor(Color.BLACK);
		mPaint.setStyle(Paint.Style.STROKE);
		mPaint.setStrokeWidth(3);
		canvas.drawRect(bgBitmapX - 2, bgBitmapY - 2, bgBitmapX + bgBitmapWidth
				+ 2, bgBitmapY + bgBitmapHeight + 2, mPaint);
	}


	@Override
	public boolean onTouchEvent(MotionEvent event) {
		Log.i("View", "...onTouchEvent..22.");
		int antion = event.getAction();
		if (antion == MotionEvent.ACTION_CANCEL) {
			return false;
		}

		float touchX = event.getX();
		float touchY = event.getY();

		// 点击时
		if (antion == MotionEvent.ACTION_DOWN) {
			// 检测点击点是否在主绘图区
			if (testTouchMainPallent(touchX, touchY)) {
				setCurAction(getRealX(touchX), getRealY(touchY));
				clearSpareAction();
			}
			// 检测点击点是否在画笔选择区
			testTouchToolsPanel(touchX, touchY);
			// 检测点击点是否在画笔大小选择区
			testTouchSizePanel(touchX, touchY);
			// 检测点击点是否在颜色选择区
			testTouchColorPanel(touchX, touchY);
			// 检测点击点是否在按钮上
			testTouchButton(touchX, touchY);
		}
		// 拖动时
		if (antion == MotionEvent.ACTION_MOVE) {
			if (curAction != null) {
				curAction.move(getRealX(touchX), getRealY(touchY));
			}
		}
		// 抬起时
		if (antion == MotionEvent.ACTION_UP) {
			if (curAction != null) {
				curAction.move(getRealX(touchX), getRealY(touchY));
				actionList.add(curAction);
				currentPaintIndex++;
				curAction = null;
			}
			isBackPressed = false;
			isForwardPressed = false;
		}
		return super.onTouchEvent(event);
	}