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      1 package com.google.android.DemoKit;
      2 
      3 import java.text.DecimalFormat;
      4 import java.util.ArrayList;
      5 
      6 import android.graphics.drawable.Drawable;
      7 import android.widget.ImageView;
      8 import android.widget.TextView;
      9 
     10 public class InputController extends AccessoryController {
     11 	private TextView mTemperature;
     12 	private TextView mLightView;
     13 	private TextView mLightRawView;
     14 	private JoystickView mJoystickView;
     15 	ArrayList<SwitchDisplayer> mSwitchDisplayers;
     16 	private final DecimalFormat mLightValueFormatter = new DecimalFormat("##.#");
     17 	private final DecimalFormat mTemperatureFormatter = new DecimalFormat(
     18 			"###" + (char)0x00B0);
     19 
     20 	InputController(DemoKitActivity hostActivity) {
     21 		super(hostActivity);
     22 		mTemperature = (TextView) findViewById(R.id.tempValue);
     23 		mLightView = (TextView) findViewById(R.id.lightPercentValue);
     24 		mLightRawView = (TextView) findViewById(R.id.lightRawValue);
     25 		mJoystickView = (JoystickView) findViewById(R.id.joystickView);
     26 	}
     27 
     28 	protected void onAccesssoryAttached() {
     29 		mSwitchDisplayers = new ArrayList<SwitchDisplayer>();
     30 		for (int i = 0; i < 4; ++i) {
     31 			SwitchDisplayer sd = new SwitchDisplayer(i);
     32 			mSwitchDisplayers.add(sd);
     33 		}
     34 	}
     35 
     36 	public void setTemperature(int temperatureFromArduino) {
     37 		/*
     38 		 * Arduino board contains a 6 channel (8 channels on the Mini and Nano,
     39 		 * 16 on the Mega), 10-bit analog to digital converter. This means that
     40 		 * it will map input voltages between 0 and 5 volts into integer values
     41 		 * between 0 and 1023. This yields a resolution between readings of: 5
     42 		 * volts / 1024 units or, .0049 volts (4.9 mV) per unit.
     43 		 */
     44 		double voltagemv = temperatureFromArduino * 4.9;
     45 		/*
     46 		 * The change in voltage is scaled to a temperature coefficient of 10.0
     47 		 * mV/degC (typical) for the MCP9700/9700A and 19.5 mV/degC (typical)
     48          * for the MCP9701/9701A. The out- put voltage at 0 degC is also scaled
     49          * to 500 mV (typical) and 400 mV (typical) for the MCP9700/9700A and
     50 		 * MCP9701/9701A, respectively. VOUT = TCTA+V0degC
     51 		 */
     52 		double kVoltageAtZeroCmv = 400;
     53 		double kTemperatureCoefficientmvperC = 19.5;
     54 		double ambientTemperatureC = ((double) voltagemv - kVoltageAtZeroCmv)
     55 				/ kTemperatureCoefficientmvperC;
     56 		double temperatureF = (9.0 / 5.0) * ambientTemperatureC + 32.0;
     57 		mTemperature.setText(mTemperatureFormatter.format(temperatureF));
     58 	}
     59 
     60 	public void setLightValue(int lightValueFromArduino) {
     61 		mLightRawView.setText(String.valueOf(lightValueFromArduino));
     62 		mLightView.setText(mLightValueFormatter
     63 				.format((100.0 * (double) lightValueFromArduino / 1024.0)));
     64 	}
     65 
     66 	public void switchStateChanged(int switchIndex, boolean switchState) {
     67 		if (switchIndex >= 0 && switchIndex < mSwitchDisplayers.size()) {
     68 			SwitchDisplayer sd = mSwitchDisplayers.get(switchIndex);
     69 			sd.onSwitchStateChange(switchState);
     70 		}
     71 	}
     72 
     73 	public void joystickButtonSwitchStateChanged(boolean buttonState) {
     74 		mJoystickView.setPressed(buttonState);
     75 	}
     76 
     77 	public void joystickMoved(int x, int y) {
     78 		mJoystickView.setPosition(x, y);
     79 	}
     80 
     81 	public void onTemperature(int temperature) {
     82 		setTemperature(temperature);
     83 	}
     84 
     85 	public void onLightChange(int lightValue) {
     86 		setLightValue(lightValue);
     87 	}
     88 
     89 	public void onSwitchStateChange(int switchIndex, Boolean switchState) {
     90 		switchStateChanged(switchIndex, switchState);
     91 	}
     92 
     93 	public void onButton(Boolean buttonState) {
     94 		joystickButtonSwitchStateChanged(buttonState);
     95 	}
     96 
     97 	public void onStickMoved(int x, int y) {
     98 		joystickMoved(x, y);
     99 	}
    100 
    101 	class SwitchDisplayer {
    102 		private final ImageView mTargetView;
    103 		private final Drawable mOnImage;
    104 		private final Drawable mOffImage;
    105 
    106 		SwitchDisplayer(int switchIndex) {
    107 			int viewId, onImageId, offImageId;
    108 			switch (switchIndex) {
    109 			default:
    110 				viewId = R.id.Button1;
    111 				onImageId = R.drawable.indicator_button1_on_noglow;
    112 				offImageId = R.drawable.indicator_button1_off_noglow;
    113 				break;
    114 			case 1:
    115 				viewId = R.id.Button2;
    116 				onImageId = R.drawable.indicator_button2_on_noglow;
    117 				offImageId = R.drawable.indicator_button2_off_noglow;
    118 				break;
    119 			case 2:
    120 				viewId = R.id.Button3;
    121 				onImageId = R.drawable.indicator_button3_on_noglow;
    122 				offImageId = R.drawable.indicator_button3_off_noglow;
    123 				break;
    124 			case 3:
    125 				viewId = R.id.Button4;
    126 				onImageId = R.drawable.indicator_button_capacitive_on_noglow;
    127 				offImageId = R.drawable.indicator_button_capacitive_off_noglow;
    128 				break;
    129 			}
    130 			mTargetView = (ImageView) findViewById(viewId);
    131 			mOffImage = mHostActivity.getResources().getDrawable(offImageId);
    132 			mOnImage = mHostActivity.getResources().getDrawable(onImageId);
    133 		}
    134 
    135 		public void onSwitchStateChange(Boolean switchState) {
    136 			Drawable currentImage;
    137 			if (!switchState) {
    138 				currentImage = mOffImage;
    139 			} else {
    140 				currentImage = mOnImage;
    141 			}
    142 			mTargetView.setImageDrawable(currentImage);
    143 		}
    144 
    145 	}
    146 }
    147