| /* |
| * Copyright (C) 2009 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package com.android.browser; |
| |
| import android.graphics.Bitmap; |
| import android.graphics.utils.BoundaryPatch; |
| import android.graphics.Canvas; |
| import android.graphics.Paint; |
| import android.webkit.WebView; |
| |
| /*package*/ class MeshTracker extends WebView.DragTracker { |
| |
| private static class Mesh { |
| private int mWhich; |
| private int mRows; |
| private int mCols; |
| private BoundaryPatch mPatch = new BoundaryPatch(); |
| private float[] mCubics = new float[24]; |
| private float[] mOrig = new float[24]; |
| private float mStretchX, mStretchY; |
| |
| Mesh(int which, int rows, int cols) { |
| mWhich = which; |
| mRows = rows; |
| mCols = cols; |
| } |
| |
| private void rebuildPatch() { |
| mPatch.setCubicBoundary(mCubics, 0, mRows, mCols); |
| } |
| |
| private void setSize(float w, float h) { |
| float[] pts = mCubics; |
| float x1 = w*0.3333f; |
| float y1 = h*0.3333f; |
| float x2 = w*0.6667f; |
| float y2 = h*0.6667f; |
| pts[0*2+0] = 0; pts[0*2+1] = 0; |
| pts[1*2+0] = x1; pts[1*2+1] = 0; |
| pts[2*2+0] = x2; pts[2*2+1] = 0; |
| |
| pts[3*2+0] = w; pts[3*2+1] = 0; |
| pts[4*2+0] = w; pts[4*2+1] = y1; |
| pts[5*2+0] = w; pts[5*2+1] = y2; |
| |
| pts[6*2+0] = w; pts[6*2+1] = h; |
| pts[7*2+0] = x2; pts[7*2+1] = h; |
| pts[8*2+0] = x1; pts[8*2+1] = h; |
| |
| pts[9*2+0] = 0; pts[9*2+1] = h; |
| pts[10*2+0] = 0; pts[10*2+1] = y2; |
| pts[11*2+0] = 0; pts[11*2+1] = y1; |
| |
| System.arraycopy(pts, 0, mOrig, 0, 24); |
| |
| // recall our stretcher |
| setStretch(mStretchX, mStretchY); |
| } |
| |
| public void setBitmap(Bitmap bm) { |
| mPatch.setTexture(bm); |
| setSize(bm.getWidth(), bm.getHeight()); |
| } |
| |
| // first experimental behavior |
| private void doit1(float dx, float dy) { |
| final float scale = 0.75f; // temper how far we actually move |
| dx *= scale; |
| dy *= scale; |
| |
| int index; |
| if (dx < 0) { |
| index = 10; |
| } else { |
| index = 4; |
| } |
| mCubics[index*2 + 0] = mOrig[index*2 + 0] + dx; |
| mCubics[index*2 + 2] = mOrig[index*2 + 2] + dx; |
| |
| if (dy < 0) { |
| index = 1; |
| } else { |
| index = 7; |
| } |
| mCubics[index*2 + 1] = mOrig[index*2 + 1] + dy; |
| mCubics[index*2 + 3] = mOrig[index*2 + 3] + dy; |
| } |
| |
| private void doit2(float dx, float dy) { |
| final float scale = 0.35f; // temper how far we actually move |
| dx *= scale; |
| dy *= scale; |
| final float cornerScale = 0.25f; |
| |
| int index; |
| if (dx < 0) { |
| index = 4; |
| } else { |
| index = 10; |
| } |
| mCubics[index*2 + 0] = mOrig[index*2 + 0] + dx; |
| mCubics[index*2 + 2] = mOrig[index*2 + 2] + dx; |
| // corners |
| index -= 1; |
| mCubics[index*2 + 0] = mOrig[index*2 + 0] + dx * cornerScale; |
| index = (index + 3) % 12; // next corner |
| mCubics[index*2 + 0] = mOrig[index*2 + 0] + dx * cornerScale; |
| |
| if (dy < 0) { |
| index = 7; |
| } else { |
| index = 1; |
| } |
| mCubics[index*2 + 1] = mOrig[index*2 + 1] + dy; |
| mCubics[index*2 + 3] = mOrig[index*2 + 3] + dy; |
| // corners |
| index -= 1; |
| mCubics[index*2 + 1] = mOrig[index*2 + 1] + dy * cornerScale; |
| index = (index + 3) % 12; // next corner |
| mCubics[index*2 + 1] = mOrig[index*2 + 1] + dy * cornerScale; |
| } |
| |
| public void setStretch(float dx, float dy) { |
| mStretchX = dx; |
| mStretchY = dy; |
| switch (mWhich) { |
| case 1: |
| doit1(dx, dy); |
| break; |
| case 2: |
| doit2(dx, dy); |
| break; |
| } |
| rebuildPatch(); |
| } |
| |
| public void draw(Canvas canvas) { |
| mPatch.draw(canvas); |
| } |
| } |
| |
| private Mesh mMesh; |
| private Bitmap mBitmap; |
| private int mWhich; |
| private Paint mBGPaint; |
| |
| public MeshTracker(int which) { |
| mWhich = which; |
| } |
| |
| public void setBGPaint(Paint paint) { |
| mBGPaint = paint; |
| } |
| |
| @Override public void onStartDrag(float x, float y) { |
| mMesh = new Mesh(mWhich, 16, 16); |
| } |
| |
| @Override public void onBitmapChange(Bitmap bm) { |
| mBitmap = bm; |
| mMesh.setBitmap(bm); |
| } |
| |
| @Override public boolean onStretchChange(float sx, float sy) { |
| mMesh.setStretch(-sx, -sy); |
| return true; |
| } |
| |
| @Override public void onStopDrag() { |
| mMesh = null; |
| } |
| |
| @Override public void onDraw(Canvas canvas) { |
| if (mWhich == 2) { |
| if (mBGPaint != null) { |
| canvas.drawPaint(mBGPaint); |
| } else { |
| canvas.drawColor(0xFF000000); |
| } |
| } |
| mMesh.draw(canvas); |
| } |
| } |
| |