帆布放大部分 [英] canvas zoom in partially

问题描述

我想在画布板放大部分的信托盘按钮将被固定的，董事会将变焦，
该部分编码是为提下方，屏幕充分借鉴在画布上，可以被视为一提的底部..请帮助和感谢您的关注。

I want to zoom in the canvas board partially as the letter tray button will be fixed and the board will be zoom,
The partially coding is as mention below and the screen is fully draw in canvas which can be viewed as mention at the bottom.. please help and thanks for you concern.

        public class BoardView extends SurfaceView implements SurfaceHolder.Callback
                {
        class DrawingThread extends Thread implements OnTouchListener {

        public DrawingThread(SurfaceHolder holder, Handler handler) {
                    mSurfaceHolder = holder;

        public void setRunning(boolean b) {
                    mRun = b;
                }

                @Override
                public void run() {
                    while (mRun) {
                        Canvas c = null;
                        try {
                            c = mSurfaceHolder.lockCanvas(null);

        synchronized (mSurfaceHolder) {
                                // System.gc();
                                // c.scale(canvasScaleX, canvasScaleY);
                                // c.save();
                                // c.translate(canvasTranslateX, canvasTranslateY);
                                doDraw(c);
                            }

                            updateGame();
                        } finally {
                            if (c != null) {
                                mSurfaceHolder.unlockCanvasAndPost(c);
                            }
                        }
        }

        private void doDraw(Canvas canvas) {
                    if (ge == null)
                        return;

                        Rect bRect = new Rect(0, 0, dims.getTotalWidth(),
                        dims.getScoreHeight() + dims.getBoardheight());
                Drawable drawable = getResources().getDrawable(R.drawable.board);
                drawable.setBounds(bRect);

                drawable.draw(canvas);

                Rect tRect = new Rect(0, dims.getScoreHeight()
                        + dims.getBoardheight(), dims.getTotalWidth(),
                        dims.getTotalHeight());
                canvas.drawRect(tRect, fillTrayPaint);

                int topHeight = dims.getScoreHeight() + dims.getBoardheight();
                int bottom = (dims.getTotalHeight() + 5)
                        - (dims.getTotalWidth() / Tray.TRAY_SIZE);
                Rect rect = new Rect(0, topHeight, dims.getTotalWidth(), bottom - 7);
                Drawable drawableTray = getResources()
                        .getDrawable(R.drawable.strip);
                drawableTray.setBounds(rect);
                drawableTray.draw(canvas);
                        drawTray(canvas);
                drawBoard(canvas);

                // drawScore(canvas);
                drawMovingTile(canvas);
            }


public BoardView(Context context, AttributeSet attrs) {
        super(context, attrs);

        SurfaceHolder holder = getHolder();
        holder.addCallback(this);

        // endTurn=(ImageButton)findViewById(R.id.endturn_button_horizontal);
        thread = new DrawingThread(holder, handler);
    }
@Override
    public void surfaceChanged(SurfaceHolder holder, int format, int width,
            int height) {
    }

    @Override
    public void surfaceCreated(SurfaceHolder holder) {
        final float scale1 = getResources().getDisplayMetrics().density;
        defaultFontSize = (int) (MIN_FONT_DIPS * scale1 + 0.5f);
        thread.setDefaultFontSize(defaultFontSize);
        dimensions = calculateDimensions(getWidth(), getHeight());
        thread.setDimensions(dimensions);

        thread.setRunning(true);

        // if (thread != null && !thread.isAlive())
        thread.start();
    }

    @Override
    public void surfaceDestroyed(SurfaceHolder holder) {
        boolean retry = true;
        thread.setRunning(false);
        while (retry) {
            try {
                thread.join();
                retry = false;
            } catch (InterruptedException e) {

            }
        }
    }

推荐答案

我们可以简单地做到这一点通过canvas.cli preCT（矩形），在这一点上我们所该做的是保存在画布canvas.save （）后canvas.cli preCT（矩形）调用canvas.restore（）。

We can simply do it by canvas.clipRect(rectangle), at this point what we are suppose to do is save the canvas canvas.save() and after canvas.clipRect(rectangle) call canvas.restore().

这篇关于帆布放大部分的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！