TrafficSim/app/src/main/java/de/hems/trafficsim/MainActivity.java
2020-11-15 16:30:41 +01:00

341 lines
12 KiB
Java

package de.hems.trafficsim;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.LinearLayout;
import android.widget.SeekBar;
import android.widget.TextView;
import androidx.appcompat.app.AppCompatActivity;
/**
* Main user interface class, containing all necessary gui elements and their control flow.
*/
public class MainActivity extends AppCompatActivity implements SeekBar.OnSeekBarChangeListener {
/**
* default value of the number of vehicles on the track
*/
public static final int defaultNoOfVehicles = 25;
/**
* default value of the length of the track
*/
public static final int defaultTrackLength = 100;
/**
* default value of brake probability
*/
public static final float defaultBrakeProb = 0.3f;
/**
* default value of the maximum velocity of the vehicles
*/
public static final float defaultMaxVelocity = 5.0f;
/**
* default value of the delay between two simulation steps
*/
public static final int defaultDelay = 0;
/**
* default value of the number of vehicles on the track
*/
public static final int defaultHistoryLength = 50;
/**
* default value of the number of vehicles on the track
*/
public static final int defaultFrameskip = 0;
/**
* the track to show in the activity
*/
protected Track track;
/**
* the surface view on which the renderer draws the track history
*/
protected TimeRecordView trackView;
/**
* the thread which runs the simulation and visualization
*/
protected Worker worker;
/**
* the renderer instance drawing the track history
*/
protected Renderer renderer;
/**
* the layout which keeps the surface view
*/
protected LinearLayout viewStack;
/**
* Utility function to round a float to a given amount of digits.
*
* @param number number to round
* @param digits amount of digits
* @return rounded number
*/
public static float round(float number, int digits) {
float div = (float) Math.pow(10.0f, digits);
return Math.round(number * div) / div;
}
/**
* Constructor for MainActivity
*
* @param savedInstanceState Bundle with previously saved activity state, otherwise null
*/
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
this.track = new Track(defaultNoOfVehicles, defaultTrackLength, defaultBrakeProb,
defaultMaxVelocity, defaultDelay, defaultHistoryLength);
this.viewStack = findViewById(R.id.trackViewStack);
this.trackView = new TimeRecordView(this, track);
viewStack.addView(this.trackView);
this.renderer = new Renderer(track, this.trackView.getHolder());
SeekBar trackLengthSeekBar = findViewById(R.id.trackLengthSeekBar);
trackLengthSeekBar.setOnSeekBarChangeListener(this);
trackLengthSeekBar.setProgress(defaultTrackLength);
((TextView)(findViewById(R.id.trackLengthTextView))).setText(String.valueOf(defaultTrackLength));
SeekBar maxVelocitySeekBar = findViewById(R.id.maxVelocitySeekBar);
maxVelocitySeekBar.setOnSeekBarChangeListener(this);
maxVelocitySeekBar.setProgress((int)defaultMaxVelocity);
((TextView)(findViewById(R.id.maxVeloTextView))).setText(String.valueOf((int)defaultMaxVelocity));
SeekBar noOfVehiclesSeekBar = findViewById(R.id.noOfVehiclesSeekBar);
noOfVehiclesSeekBar.setOnSeekBarChangeListener(this);
noOfVehiclesSeekBar.setProgress(defaultNoOfVehicles);
((TextView)(findViewById(R.id.noOfVehiclesTextView))).setText(String.valueOf(defaultNoOfVehicles));
SeekBar brakeProbabilitySeekBar = findViewById(R.id.brakeProbabilitySeekBar);
brakeProbabilitySeekBar.setOnSeekBarChangeListener(this);
brakeProbabilitySeekBar.setProgress((int)(defaultBrakeProb*20));
((TextView)(findViewById(R.id.brakeProbTextView))).setText(String.valueOf(defaultBrakeProb));
SeekBar delaySeekBar = findViewById(R.id.simDelaySeekBar);
delaySeekBar.setOnSeekBarChangeListener(this);
delaySeekBar.setProgress(defaultDelay);
((TextView) (findViewById(R.id.simDelayTextView))).setText(String.valueOf(defaultDelay));
SeekBar frameskipSeekBar = findViewById(R.id.frameskipSeekBar);
frameskipSeekBar.setOnSeekBarChangeListener(this);
frameskipSeekBar.setProgress(defaultFrameskip);
((TextView) (findViewById(R.id.frameSkipTextView))).setText(String.valueOf(defaultFrameskip));
this.updateStats();
}
/**
* Updates the statistics view.
*/
public void updateStats() {
final Track trackRef = this.track;
final TextView lastAvgView = findViewById(R.id.avgVeloLastView);
final TextView overallAvgView = findViewById(R.id.avgVeloOverallView);
final TextView delayedAvgView = findViewById(R.id.delayedAvgTextView);
final TextView stepsView = findViewById(R.id.stepsTextView);
runOnUiThread(new Runnable() {
@Override
public void run() {
lastAvgView.setText(String.valueOf(round(trackRef.getLastAvg(), 2)));
overallAvgView.setText(String.valueOf(round(trackRef.getOverallAvg(), 2)));
stepsView.setText(String.valueOf(trackRef.getSteps()));
delayedAvgView.setText(String.valueOf(round(trackRef.getDelayedAvg(), 2)));
}
});
}
/**
* Handler function for clicks on the "Step" button.
*
* @param view the view the event is generated from
*/
public void onStepButtonClick(View view) {
this.track.timeElapse();
this.updateStats();
this.renderer.draw();
}
/**
* Handler function for clicks on the "Play" button.
*
* @param view the view the event is generated from
*/
public void onPlayButtonClick(View view) {
Button playButton = findViewById(R.id.playButton);
playButton.setEnabled(false);
Button stepButton = findViewById(R.id.stepButton);
stepButton.setEnabled(false);
Button stopButton = findViewById(R.id.stopButton);
stopButton.setEnabled(true);
Button clearButton = findViewById(R.id.clearButton);
clearButton.setEnabled(false);
int frameskip = ((SeekBar) (findViewById(R.id.frameskipSeekBar))).getProgress();
this.worker = new Worker(track, this, renderer, frameskip);
this.worker.start();
}
/**
* Handler function for clicks on the "Stop" button.
*
* @param view the view the event is generated from
*/
public void onStopButtonClick(View view) {
Button playButton = findViewById(R.id.playButton);
playButton.setEnabled(true);
Button stepButton = findViewById(R.id.stepButton);
stepButton.setEnabled(true);
Button stopButton = findViewById(R.id.stopButton);
stopButton.setEnabled(false);
Button clearButton = findViewById(R.id.clearButton);
clearButton.setEnabled(true);
this.stopWorker();
this.worker = null;
}
/**
* Stops the current worker thread.
*/
protected void stopWorker() {
this.worker.setStop(true);
try {
this.worker.join();
} catch (InterruptedException ex) {
}
this.worker = null;
}
/**
* Handler function for clicks on the "Stop" button.
*
* @param view the view the event is generated from
*/
public void onClearButtonClick(View view) {
if (this.worker != null) { // There was a simulation running
this.stopWorker();
}
Button playButton = findViewById(R.id.playButton);
playButton.setEnabled(true);
Button stepButton = findViewById(R.id.stepButton);
stepButton.setEnabled(true);
Button stopButton = findViewById(R.id.stopButton);
stopButton.setEnabled(false);
this.updateTrack();
this.updateStats();
this.renderer.draw();
}
/**
* Creates a new track with the current settings. This methods restarts the simulation it
* it was running before.
*/
protected void updateTrack() {
int newTrackLength = ((SeekBar) (findViewById(R.id.trackLengthSeekBar))).getProgress();
SeekBar noOfVehiclesSeekBar = findViewById(R.id.noOfVehiclesSeekBar);
int newNoOfVehicles = noOfVehiclesSeekBar.getProgress();
if (newTrackLength < newNoOfVehicles) { // Dont allow values greater than track length!
newNoOfVehicles = newTrackLength;
noOfVehiclesSeekBar.setProgress(newNoOfVehicles);
}
TextView noOfVehiclesTextView = findViewById(R.id.noOfVehiclesTextView);
noOfVehiclesTextView.setText(String.valueOf(newNoOfVehicles));
TextView trackLengthTextView = findViewById(R.id.trackLengthTextView);
trackLengthTextView.setText(String.valueOf(newTrackLength));
float newMaxVelocity = ((SeekBar) findViewById(R.id.maxVelocitySeekBar)).getProgress();
SeekBar brakeProbabilitySeekBar = findViewById(R.id.brakeProbabilitySeekBar);
float newBrakeProb = (float) brakeProbabilitySeekBar.getProgress()
/ (float)brakeProbabilitySeekBar.getMax();
int newDelay = ((SeekBar)(findViewById(R.id.simDelaySeekBar))).getProgress();
int newFrameskip = ((SeekBar)(findViewById(R.id.frameskipSeekBar))).getProgress();
boolean wasRunning = this.worker != null;
if (wasRunning) {
this.worker.setStop(true);
try {
this.worker.join();
} catch (InterruptedException ex) {
}
}
this.track = new Track(newNoOfVehicles, newTrackLength, newBrakeProb, newMaxVelocity,
newDelay, defaultHistoryLength);
this.renderer.setTrack(this.track);
if (wasRunning) {
this.worker = new Worker(track, this, renderer, newFrameskip);
this.worker.start();
}
}
/**
* Handler function for changes on the seek bars.
*
* @param seekBar the seek bar changed
* @param progress the new progress value of the seek bar
* @param fromUser flag if the event is the result of an user action
*/
@Override
public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) {
if (seekBar == findViewById(R.id.noOfVehiclesSeekBar)) {
this.updateTrack();
} else if (seekBar == findViewById(R.id.brakeProbabilitySeekBar)) {
float newBrakeProb = (float) seekBar.getProgress() / (float) seekBar.getMax();
this.track.setBrakeProb(newBrakeProb);
TextView newBrakeProbTextView = findViewById(R.id.brakeProbTextView);
newBrakeProbTextView.setText(String.valueOf((newBrakeProb)));
} else if (seekBar == findViewById(R.id.maxVelocitySeekBar)) {
this.track.setMaxVelocity(seekBar.getProgress());
TextView tv = findViewById(R.id.maxVeloTextView);
tv.setText(String.valueOf(progress));
} else if (seekBar == findViewById(R.id.trackLengthSeekBar)) {
this.updateTrack();
} else if (seekBar == findViewById(R.id.simDelaySeekBar)) {
TextView tv = findViewById(R.id.simDelayTextView);
tv.setText(String.valueOf(seekBar.getProgress()));
this.track.setWaitTime(seekBar.getProgress());
} else if (seekBar == findViewById(R.id.frameskipSeekBar)) {
TextView tv = findViewById(R.id.frameSkipTextView);
tv.setText(String.valueOf(seekBar.getProgress()));
if (this.worker != null) {
this.worker.setFrameskip(seekBar.getProgress());
}
}
}
/**
* Handler function for beginning touch events on a seek bar.
*
* @param seekBar the seek bar touched
*/
@Override
public void onStartTrackingTouch(SeekBar seekBar) {
}
/**
* Handler function for ending touch events on a seek bar.
*
* @param seekBar the seek bar touched
*/
@Override
public void onStopTrackingTouch(SeekBar seekBar) {
}
}