androidplot 확대/축소보기 오류

Question

터치 확대/축소 예제에서 androidplot을 만든 사람들이 제공 한 코드를 편집하도록 도와 줄 사람이 있습니까? 나는 그것을 사용할 계획이지만, 나는 그 플롯을 확대 할 때마다 다시 원래 크기로 축소 할 수 없다는 것을 알아 차렸다. 여기

내가, 그것을 지금 스크롤 androidplot touchzoom 예를 수리하는 https://bitbucket.org/androidplot/androidplot/src/397fac6a3541b4020a716e958a9c0b42bd2450fd/Examples/DemoApp/src/com/androidplot/demos/TouchZoomExampleActivity.java?at=master

Answer 1

의 코드이며,이 경계 의 크기를 잃지 않고이 mainActivity.java

코드입니다해야으로 확대

package com.tutorialz.paul.scaleplotdesign; 

import java.util.ArrayList; 
import java.util.Random; 

import android.app.Activity; 
import android.graphics.PointF; 
import android.os.Bundle; 
import android.util.FloatMath; 
import android.view.MotionEvent; 
import android.view.View; 
import android.view.View.OnTouchListener; 
import android.widget.Button; 
import android.widget.Toast; 

import com.androidplot.Plot; 
import com.androidplot.ui.SizeLayoutType; 
import com.androidplot.ui.SizeMetrics; 
import com.androidplot.xy.BoundaryMode; 
import com.androidplot.xy.LineAndPointFormatter; 
import com.androidplot.xy.PointLabelFormatter; 
import com.androidplot.xy.SimpleXYSeries; 
import com.androidplot.xy.XYPlot; 

public class MainActivity extends Activity implements OnTouchListener { 
    private static final int SERIES_SIZE = 200; 
    private XYPlot plotOne, plotTwo; 
    private SimpleXYSeries series1 = null; 
    private SimpleXYSeries series2 = null; 
    private PointF minXY; 
    private PointF maxXY; 
    float zoomRatio = 2, leftBoundary, rightBoundary; 

    public void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.activity_main); 

     //plot setup 
     plotOne = (XYPlot) findViewById(R.id.myFirstXYPlot); 
     plotOne.setOnTouchListener(this); 
     plotOne.getGraphWidget().setTicksPerRangeLabel(2); 
     plotOne.getGraphWidget().setTicksPerDomainLabel(2); 
     plotOne.getGraphWidget().setRangeLabelWidth(25); 
     plotOne.setRangeLabel(""); 
     plotOne.setDomainLabel(""); 
     plotOne.setBorderStyle(Plot.BorderStyle.NONE, null, null); 
     plotOne.getLayoutManager().remove(plotOne.getLegendWidget()); 
     plotOne.getGraphWidget().setSize(new SizeMetrics(0,SizeLayoutType.FILL, 
       0, SizeLayoutType.FILL)); 
     plotOne.setPlotMargins(0,0,0,0); 

     plotTwo = (XYPlot) findViewById(R.id.mySecondXYPlot); 
     plotTwo.setOnTouchListener(this); 
     plotTwo.getGraphWidget().setTicksPerRangeLabel(2); 
     plotTwo.getGraphWidget().setTicksPerDomainLabel(2); 
     plotTwo.getGraphWidget().setRangeLabelWidth(25); 
     plotTwo.setRangeLabel(""); 
     plotTwo.setDomainLabel(""); 
     plotTwo.setBorderStyle(Plot.BorderStyle.NONE, null, null); 
     plotTwo.getLayoutManager().remove(plotTwo.getLegendWidget()); 
     plotTwo.getGraphWidget().setSize(new SizeMetrics(0,SizeLayoutType.FILL, 
       0, SizeLayoutType.FILL)); 
     plotTwo.setPlotMargins(0,0,0,0); 
     //******** 
     //series setup 
     series1 = new SimpleXYSeries("PARAM"); 
     populateSeries(series1, 25); 
     //series1.setModel(values1, SimpleXYSeries.ArrayFormat.Y_VALS_ONLY); 
     series1.useImplicitXVals(); 
     LineAndPointFormatter line1 = new LineAndPointFormatter(); 
     line1.setPointLabelFormatter(new PointLabelFormatter()); 
     line1.configure(getApplicationContext(), R.xml.f1); 

     series2 = new SimpleXYSeries("PARAM"); 
     populateSeries(series2, 15); 
     //series2.setModel(values1, SimpleXYSeries.ArrayFormat.Y_VALS_ONLY); 
     series2.useImplicitXVals(); 
     LineAndPointFormatter line2 = new LineAndPointFormatter(); 
     line2.setPointLabelFormatter(new PointLabelFormatter()); 
     line2.configure(getApplicationContext(), R.xml.f2); 

     plotOne.addSeries(series1, line1); 
     plotTwo.addSeries(series2, line2); 

     plotOne.redraw(); 
     plotTwo.redraw(); 

     plotOne.calculateMinMaxVals(); 
     minXY = new PointF(plotOne.getCalculatedMinX().floatValue(), 
       plotOne.getCalculatedMinY().floatValue()); 
     maxXY = new PointF(plotOne.getCalculatedMaxX().floatValue(), 
       plotOne.getCalculatedMaxY().floatValue()); 

     leftBoundary = series1.getX(0).floatValue(); 
     rightBoundary = series1.getX(series1.size() - 1).floatValue(); 
    } 

    private void populateSeries(SimpleXYSeries series, int max) { 
     Random r = new Random(); 
     for(int i = 0; i < SERIES_SIZE; i++) { 
      series.addLast(i, r.nextInt(max)); 
     } 
    } 
    //***************** 
    // Definition of the touch states 
    static final int NONE = 0; 
    static final int ONE_FINGER_DRAG = 1; 
    static final int TWO_FINGERS_DRAG = 2; 
    int mode = NONE; 

    PointF firstFinger; 
    float distBetweenFingers; 
    boolean stopThread = false; 

    @Override 
    public boolean onTouch(View arg0, MotionEvent event) { 
     switch (event.getAction() & MotionEvent.ACTION_MASK) { 
      case MotionEvent.ACTION_DOWN: // Start gesture 
       firstFinger = new PointF(event.getX(), event.getY()); 
       mode = ONE_FINGER_DRAG; 
       stopThread = true; 
       break; 
      case MotionEvent.ACTION_POINTER_UP: 
      case MotionEvent.ACTION_UP: 
       mode = NONE; 
       break; 
      case MotionEvent.ACTION_POINTER_DOWN: // second finger 
       distBetweenFingers = spacing(event); 
       // the distance check is done to avoid false alarms 
       if (distBetweenFingers > 5f) { 
        mode = TWO_FINGERS_DRAG; 
       } 
       break; 
      case MotionEvent.ACTION_MOVE: 
       if (mode == ONE_FINGER_DRAG) { 
        PointF oldFirstFinger = firstFinger; 
        firstFinger = new PointF(event.getX(), event.getY()); 
        scroll(oldFirstFinger.x - firstFinger.x); 
        plotOne.setDomainBoundaries(minXY.x, maxXY.x, 
          BoundaryMode.FIXED); 
        plotOne.redraw(); 
        plotTwo.setDomainBoundaries(minXY.x, maxXY.x, 
          BoundaryMode.FIXED); 
        plotTwo.redraw(); 

       } else if (mode == TWO_FINGERS_DRAG) { 
        float oldDist = distBetweenFingers; 
        distBetweenFingers = spacing(event); 
        zoom(oldDist/distBetweenFingers); 
        plotOne.setDomainBoundaries(minXY.x, maxXY.x, 
          BoundaryMode.FIXED); 
        plotOne.redraw(); 
        plotTwo.setDomainBoundaries(minXY.x, maxXY.x, 
          BoundaryMode.FIXED); 
        plotTwo.redraw(); 
       } 
       break; 
     } 
     return true; 
    } 

    private void zoom(float scale) { 
     float domainSpan = maxXY.x - minXY.x; 
     float oldMax = maxXY.x; 
     float oldMin = minXY.x; 
     float domainMidPoint = maxXY.x - (domainSpan/2.0f); 
     float offset = domainSpan * scale/2.0f; 
     minXY.x = domainMidPoint - offset; 
     maxXY.x = domainMidPoint + offset; 
     float newSpan = maxXY.x - minXY.x; 
     if (newSpan < (float)5) { 
      minXY.x = oldMin; 
      maxXY.x = oldMax; 
     } 

     if (minXY.x < leftBoundary) { 
      minXY.x = leftBoundary; 
      maxXY.x = leftBoundary + domainSpan * zoomRatio; 
      if (maxXY.x > series1.getX(series1.size() - 1).floatValue()) 
       maxXY.x = rightBoundary; 
     } 
     if (maxXY.x > series1.getX(series1.size() - 1).floatValue()) { 
      maxXY.x = rightBoundary; 
      minXY.x = rightBoundary - domainSpan * zoomRatio; 
      if (minXY.x < leftBoundary) minXY.x = leftBoundary; 
     } 
    } 

    private void scroll(float pan) { 
     float domainSpan = maxXY.x - minXY.x; 
     float step = domainSpan/plotOne.getWidth(); 
     float offset = pan * step; 
     minXY.x = minXY.x + offset; 
     maxXY.x = maxXY.x + offset; 

     if (minXY.x < leftBoundary) { 
      minXY.x = leftBoundary; 
      maxXY.x = leftBoundary + domainSpan; 
     } 
     if (maxXY.x > series1.getX(series1.size() - 1).floatValue()) { 
      maxXY.x = rightBoundary; 
      minXY.x = rightBoundary - domainSpan; 
     } 
    } 

    private float spacing(MotionEvent event) { 
     float x = event.getX(0) - event.getX(1); 
     float y = event.getY(0) - event.getY(1); 
     return FloatMath.sqrt(x * x + y * y); 
    } 
} 

이이 main_activity.xml

<?xml version="1.0" encoding="utf-8"?> 
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" 
    android:layout_width="match_parent" 
    android:layout_height="match_parent" 
    android:orientation="vertical"> 

    <LinearLayout 
     android:layout_width="match_parent" 
     android:layout_height="300dp" 
     android:orientation="vertical" 
     android:background="#FF727272" 
     android:layout_margin="10dp"> 
    <com.androidplot.xy.XYPlot 
     android:id="@+id/myFirstXYPlot" 
     android:layout_width="fill_parent" 
     android:layout_height="fill_parent" 
     android:layout_weight="1" 
     androidPlot.graphWidget.paddingLeft="20dp" 
     androidPlot.graphWidget.paddingRight="20dp" 
     androidPlot.graphWidget.backgroundPaint.color="#ff727272" 
     androidPlot.graphWidget.gridBackgroundPaint.color="#ffe3e3e3" 
     androidPlot.graphWidget.rangeLabelPaint.textSize="10dp" 
     androidPlot.graphWidget.domainLabelPaint.textSize="10dp" 
     androidplot.renderMode="use_background_thread" 
     /> 

    <com.androidplot.xy.XYPlot 
     android:id="@+id/mySecondXYPlot" 
     android:layout_width="fill_parent" 
     android:layout_height="fill_parent" 
     android:layout_weight="1" 
     androidPlot.graphWidget.backgroundPaint.color="#ff727272" 
     androidPlot.graphWidget.gridBackgroundPaint.color="#ffe3e3e3" 
     androidPlot.graphWidget.paddingLeft="20dp" 
     androidPlot.graphWidget.paddingRight="20dp" 
     androidPlot.graphWidget.rangeLabelPaint.textSize="10dp" 
     androidPlot.graphWidget.domainLabelPaint.textSize="10dp" 
     androidplot.renderMode="use_background_thread" 
     /> 
    </LinearLayout> 
</LinearLayout>