view Android/java/org/madbutterfly/MBView.java @ 1280:434f588fcde4

Handle the change of attribute 'start' and 'end'. We do reset here. However, we should be able to optimize it latter to update the scenes directly.
author wycc
date Fri, 14 Jan 2011 00:00:11 +0800
parents c468e397614d
children
line wrap: on
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package org.madbutterfly;

import android.view.SurfaceView;
import android.view.SurfaceHolder;
import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Bitmap;
import android.graphics.Paint;
import android.graphics.Xfermode;
import android.graphics.PorterDuff;
import android.graphics.PorterDuffXfermode;

public class MBView extends SurfaceView {
    redraw_man rdman;
    Canvas cr, backend;
    Bitmap cr_bmap, backend_bmap;
    Paint copy_pnt;
    int w, h;
    
    public MBView(Context context) {
	super(context);
	Paint paint;
	Xfermode mode;
	
	rdman = null;
	cr = null;
	backend = null;
	
	mode = new PorterDuffXfermode(PorterDuff.Mode.SRC);
	copy_pnt = new Paint();
	copy_pnt.setXfermode(mode);
	w = 100;
	h = 100;
    }
    
    public redraw_man get_rdman() {
	if(rdman != null)
	    return rdman;

	w = getWidth();
	h = getHeight();

	cr_bmap = Bitmap.createBitmap(w, h, Bitmap.Config.ARGB_8888);
	cr = new Canvas(cr_bmap);
	backend_bmap = Bitmap.createBitmap(w, h, Bitmap.Config.ARGB_8888);
	backend = new Canvas(backend_bmap);
	
	rdman = new redraw_man(cr, backend, this);

	return rdman;
    }

    protected void onSizeChanged(int w, int h, int oldw, int oldh) {
	this.w = w;
	this.h = h;

	if(rdman == null) {
	    get_rdman();
	    return;
	}
	
	cr_bmap = Bitmap.createBitmap(w, h, Bitmap.Config.ARGB_8888);
	cr.setBitmap(cr_bmap);
	backend_bmap = Bitmap.createBitmap(w, h, Bitmap.Config.ARGB_8888);
	backend.setBitmap(backend_bmap);
    }

    public void redraw() {
	SurfaceHolder holder;
	Canvas canvas;

	holder = getHolder();
	canvas = holder.lockCanvas();
	canvas.drawBitmap(backend_bmap, 0, 0, copy_pnt);
	holder.unlockCanvasAndPost(canvas);
    }
}