300 lines
12 KiB
Java
300 lines
12 KiB
Java
/*
|
|
* Copyright (C) 2007 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.development;
|
|
|
|
import android.app.Activity;
|
|
import android.content.Context;
|
|
import android.graphics.Canvas;
|
|
import android.graphics.Paint;
|
|
import android.graphics.Paint.FontMetricsInt;
|
|
import android.os.Bundle;
|
|
import android.util.Log;
|
|
import android.view.MotionEvent;
|
|
import android.view.WindowManager;
|
|
import android.view.VelocityTracker;
|
|
import android.view.View;
|
|
|
|
import java.util.ArrayList;
|
|
|
|
/**
|
|
* Demonstrates wrapping a layout in a ScrollView.
|
|
*
|
|
*/
|
|
public class PointerLocation extends Activity {
|
|
@Override
|
|
protected void onCreate(Bundle icicle) {
|
|
super.onCreate(icicle);
|
|
setContentView(new MyView(this));
|
|
|
|
// Make the screen full bright for this activity.
|
|
WindowManager.LayoutParams lp = getWindow().getAttributes();
|
|
lp.screenBrightness = 1.0f;
|
|
getWindow().setAttributes(lp);
|
|
}
|
|
|
|
public static class PointerState {
|
|
private final ArrayList<Float> mXs = new ArrayList<Float>();
|
|
private final ArrayList<Float> mYs = new ArrayList<Float>();
|
|
private boolean mCurDown;
|
|
private int mCurX;
|
|
private int mCurY;
|
|
private float mCurPressure;
|
|
private float mCurSize;
|
|
private int mCurWidth;
|
|
private VelocityTracker mVelocity;
|
|
}
|
|
|
|
public class MyView extends View {
|
|
private final Paint mTextPaint;
|
|
private final Paint mTextBackgroundPaint;
|
|
private final Paint mTextLevelPaint;
|
|
private final Paint mPaint;
|
|
private final Paint mTargetPaint;
|
|
private final Paint mPathPaint;
|
|
private final FontMetricsInt mTextMetrics = new FontMetricsInt();
|
|
private int mHeaderBottom;
|
|
private boolean mCurDown;
|
|
private int mCurNumPointers;
|
|
private int mMaxNumPointers;
|
|
private final ArrayList<PointerState> mPointers
|
|
= new ArrayList<PointerState>();
|
|
|
|
public MyView(Context c) {
|
|
super(c);
|
|
mTextPaint = new Paint();
|
|
mTextPaint.setAntiAlias(true);
|
|
mTextPaint.setTextSize(10
|
|
* getResources().getDisplayMetrics().density);
|
|
mTextPaint.setARGB(255, 0, 0, 0);
|
|
mTextBackgroundPaint = new Paint();
|
|
mTextBackgroundPaint.setAntiAlias(false);
|
|
mTextBackgroundPaint.setARGB(128, 255, 255, 255);
|
|
mTextLevelPaint = new Paint();
|
|
mTextLevelPaint.setAntiAlias(false);
|
|
mTextLevelPaint.setARGB(192, 255, 0, 0);
|
|
mPaint = new Paint();
|
|
mPaint.setAntiAlias(true);
|
|
mPaint.setARGB(255, 255, 255, 255);
|
|
mPaint.setStyle(Paint.Style.STROKE);
|
|
mPaint.setStrokeWidth(2);
|
|
mTargetPaint = new Paint();
|
|
mTargetPaint.setAntiAlias(false);
|
|
mTargetPaint.setARGB(192, 0, 0, 255);
|
|
mPathPaint = new Paint();
|
|
mPathPaint.setAntiAlias(false);
|
|
mPathPaint.setARGB(255, 64, 128, 255);
|
|
mPaint.setStyle(Paint.Style.STROKE);
|
|
mPaint.setStrokeWidth(1);
|
|
|
|
PointerState ps = new PointerState();
|
|
ps.mVelocity = VelocityTracker.obtain();
|
|
mPointers.add(ps);
|
|
}
|
|
|
|
@Override
|
|
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
|
|
super.onMeasure(widthMeasureSpec, heightMeasureSpec);
|
|
mTextPaint.getFontMetricsInt(mTextMetrics);
|
|
mHeaderBottom = -mTextMetrics.ascent+mTextMetrics.descent+2;
|
|
Log.i("foo", "Metrics: ascent=" + mTextMetrics.ascent
|
|
+ " descent=" + mTextMetrics.descent
|
|
+ " leading=" + mTextMetrics.leading
|
|
+ " top=" + mTextMetrics.top
|
|
+ " bottom=" + mTextMetrics.bottom);
|
|
}
|
|
|
|
@Override
|
|
protected void onDraw(Canvas canvas) {
|
|
final int w = getWidth();
|
|
final int itemW = w/7;
|
|
final int base = -mTextMetrics.ascent+1;
|
|
final int bottom = mHeaderBottom;
|
|
|
|
final int NP = mPointers.size();
|
|
|
|
if (NP > 0) {
|
|
final PointerState ps = mPointers.get(0);
|
|
canvas.drawRect(0, 0, itemW-1, bottom,mTextBackgroundPaint);
|
|
canvas.drawText("P: " + mCurNumPointers + " / " + mMaxNumPointers,
|
|
1, base, mTextPaint);
|
|
|
|
canvas.drawRect(itemW, 0, (itemW * 2) - 1, bottom, mTextBackgroundPaint);
|
|
canvas.drawText("X: " + ps.mCurX, 1 + itemW, base, mTextPaint);
|
|
|
|
canvas.drawRect(itemW * 2, 0, (itemW * 3) - 1, bottom, mTextBackgroundPaint);
|
|
canvas.drawText("Y: " + ps.mCurY, 1 + itemW * 2, base, mTextPaint);
|
|
|
|
canvas.drawRect(itemW * 3, 0, (itemW * 4) - 1, bottom, mTextBackgroundPaint);
|
|
int velocity = ps.mVelocity == null ? 0 : (int) (ps.mVelocity.getXVelocity() * 1000);
|
|
canvas.drawText("Xv: " + velocity, 1 + itemW * 3, base, mTextPaint);
|
|
|
|
canvas.drawRect(itemW * 4, 0, (itemW * 5) - 1, bottom, mTextBackgroundPaint);
|
|
velocity = ps.mVelocity == null ? 0 : (int) (ps.mVelocity.getYVelocity() * 1000);
|
|
canvas.drawText("Yv: " + velocity, 1 + itemW * 4, base, mTextPaint);
|
|
|
|
canvas.drawRect(itemW * 5, 0, (itemW * 6) - 1, bottom, mTextBackgroundPaint);
|
|
canvas.drawRect(itemW * 5, 0, (itemW * 5) + (ps.mCurPressure * itemW) - 1,
|
|
bottom, mTextLevelPaint);
|
|
canvas.drawText("Prs: " + String.format("%.2f", ps.mCurPressure), 1 + itemW * 5,
|
|
base, mTextPaint);
|
|
|
|
canvas.drawRect(itemW * 6, 0, w, bottom, mTextBackgroundPaint);
|
|
canvas.drawRect(itemW * 6, 0, (itemW * 6) + (ps.mCurSize * itemW) - 1,
|
|
bottom, mTextLevelPaint);
|
|
canvas.drawText("Size: " + String.format("%.2f", ps.mCurSize), 1 + itemW * 6,
|
|
base, mTextPaint);
|
|
}
|
|
|
|
for (int p=0; p<NP; p++) {
|
|
final PointerState ps = mPointers.get(p);
|
|
|
|
final int N = ps.mXs.size();
|
|
float lastX=0, lastY=0;
|
|
boolean haveLast = false;
|
|
boolean drawn = false;
|
|
mPaint.setARGB(255, 128, 255, 255);
|
|
for (int i=0; i<N; i++) {
|
|
float x = ps.mXs.get(i);
|
|
float y = ps.mYs.get(i);
|
|
if (Float.isNaN(x)) {
|
|
haveLast = false;
|
|
continue;
|
|
}
|
|
if (haveLast) {
|
|
canvas.drawLine(lastX, lastY, x, y, mPathPaint);
|
|
canvas.drawPoint(lastX, lastY, mPaint);
|
|
drawn = true;
|
|
}
|
|
lastX = x;
|
|
lastY = y;
|
|
haveLast = true;
|
|
}
|
|
|
|
if (drawn) {
|
|
if (ps.mVelocity != null) {
|
|
mPaint.setARGB(255, 255, 64, 128);
|
|
float xVel = ps.mVelocity.getXVelocity() * (1000/60);
|
|
float yVel = ps.mVelocity.getYVelocity() * (1000/60);
|
|
canvas.drawLine(lastX, lastY, lastX+xVel, lastY+yVel, mPaint);
|
|
} else {
|
|
canvas.drawPoint(lastX, lastY, mPaint);
|
|
}
|
|
}
|
|
|
|
if (mCurDown && ps.mCurDown) {
|
|
canvas.drawLine(0, (int)ps.mCurY, getWidth(), (int)ps.mCurY, mTargetPaint);
|
|
canvas.drawLine((int)ps.mCurX, 0, (int)ps.mCurX, getHeight(), mTargetPaint);
|
|
int pressureLevel = (int)(ps.mCurPressure*255);
|
|
mPaint.setARGB(255, pressureLevel, 128, 255-pressureLevel);
|
|
canvas.drawPoint(ps.mCurX, ps.mCurY, mPaint);
|
|
canvas.drawCircle(ps.mCurX, ps.mCurY, ps.mCurWidth, mPaint);
|
|
}
|
|
}
|
|
}
|
|
|
|
@Override
|
|
public boolean onTouchEvent(MotionEvent event) {
|
|
int action = event.getAction();
|
|
|
|
//Log.i("Pointer", "Motion: action=0x" + Integer.toHexString(action)
|
|
// + " pointers=" + event.getPointerCount());
|
|
|
|
int NP = mPointers.size();
|
|
|
|
//mRect.set(0, 0, getWidth(), mHeaderBottom+1);
|
|
//invalidate(mRect);
|
|
//if (mCurDown) {
|
|
// mRect.set(mCurX-mCurWidth-3, mCurY-mCurWidth-3,
|
|
// mCurX+mCurWidth+3, mCurY+mCurWidth+3);
|
|
//} else {
|
|
// mRect.setEmpty();
|
|
//}
|
|
if (action == MotionEvent.ACTION_DOWN) {
|
|
for (int p=0; p<NP; p++) {
|
|
final PointerState ps = mPointers.get(p);
|
|
ps.mXs.clear();
|
|
ps.mYs.clear();
|
|
ps.mVelocity = VelocityTracker.obtain();
|
|
ps.mCurDown = false;
|
|
}
|
|
mPointers.get(0).mCurDown = true;
|
|
}
|
|
|
|
if ((action&MotionEvent.ACTION_MASK) == MotionEvent.ACTION_POINTER_DOWN) {
|
|
final int id = (action&MotionEvent.ACTION_POINTER_ID_MASK)
|
|
>> MotionEvent.ACTION_POINTER_ID_SHIFT;
|
|
while (NP <= id) {
|
|
PointerState ps = new PointerState();
|
|
ps.mVelocity = VelocityTracker.obtain();
|
|
mPointers.add(ps);
|
|
NP++;
|
|
}
|
|
final PointerState ps = mPointers.get(id);
|
|
ps.mVelocity = VelocityTracker.obtain();
|
|
ps.mCurDown = true;
|
|
}
|
|
|
|
final int NI = event.getPointerCount();
|
|
|
|
mCurDown = action != MotionEvent.ACTION_UP
|
|
&& action != MotionEvent.ACTION_CANCEL;
|
|
mCurNumPointers = mCurDown ? NI : 0;
|
|
if (mMaxNumPointers < mCurNumPointers) {
|
|
mMaxNumPointers = mCurNumPointers;
|
|
}
|
|
|
|
for (int i=0; i<NI; i++) {
|
|
final PointerState ps = mPointers.get(event.getPointerId(i));
|
|
ps.mVelocity.addMovement(event);
|
|
ps.mVelocity.computeCurrentVelocity(1);
|
|
final int N = event.getHistorySize();
|
|
for (int j=0; j<N; j++) {
|
|
ps.mXs.add(event.getHistoricalX(i, j));
|
|
ps.mYs.add(event.getHistoricalY(i, j));
|
|
}
|
|
ps.mXs.add(event.getX(i));
|
|
ps.mYs.add(event.getY(i));
|
|
ps.mCurX = (int)event.getX(i);
|
|
ps.mCurY = (int)event.getY(i);
|
|
//Log.i("Pointer", "Pointer #" + p + ": (" + ps.mCurX
|
|
// + "," + ps.mCurY + ")");
|
|
ps.mCurPressure = event.getPressure(i);
|
|
ps.mCurSize = event.getSize(i);
|
|
ps.mCurWidth = (int)(ps.mCurSize*(getWidth()/3));
|
|
}
|
|
|
|
if ((action&MotionEvent.ACTION_MASK) == MotionEvent.ACTION_POINTER_UP) {
|
|
final int id = (action&MotionEvent.ACTION_POINTER_ID_MASK)
|
|
>> MotionEvent.ACTION_POINTER_ID_SHIFT;
|
|
final PointerState ps = mPointers.get(id);
|
|
ps.mXs.add(Float.NaN);
|
|
ps.mYs.add(Float.NaN);
|
|
ps.mCurDown = false;
|
|
}
|
|
|
|
//if (mCurDown) {
|
|
// mRect.union(mCurX-mCurWidth-3, mCurY-mCurWidth-3,
|
|
// mCurX+mCurWidth+3, mCurY+mCurWidth+3);
|
|
//}
|
|
//invalidate(mRect);
|
|
invalidate();
|
|
return true;
|
|
}
|
|
|
|
}
|
|
}
|