package com.limelight.binding.input;
import android.view.View;
import com.limelight.nvstream.NvConnection;
import com.limelight.nvstream.input.MouseButtonPacket;
import java.util.Timer;
import java.util.TimerTask;
public class TouchContext {
private int lastTouchX = 0;
private int lastTouchY = 0;
private int originalTouchX = 0;
private int originalTouchY = 0;
private long originalTouchTime = 0;
private boolean cancelled;
private boolean confirmedMove;
private boolean confirmedDrag;
private Timer dragTimer;
private double distanceMoved;
private double xFactor, yFactor;
private final NvConnection conn;
private final int actionIndex;
private final int referenceWidth;
private final int referenceHeight;
private final View targetView;
private static final int TAP_MOVEMENT_THRESHOLD = 20;
private static final int TAP_DISTANCE_THRESHOLD = 25;
private static final int TAP_TIME_THRESHOLD = 250;
private static final int DRAG_TIME_THRESHOLD = 650;
public TouchContext(NvConnection conn, int actionIndex,
int referenceWidth, int referenceHeight, View view)
{
this.conn = conn;
this.actionIndex = actionIndex;
this.referenceWidth = referenceWidth;
this.referenceHeight = referenceHeight;
this.targetView = view;
}
public int getActionIndex()
{
return actionIndex;
}
private boolean isWithinTapBounds(int touchX, int touchY)
{
int xDelta = Math.abs(touchX - originalTouchX);
int yDelta = Math.abs(touchY - originalTouchY);
return xDelta <= TAP_MOVEMENT_THRESHOLD &&
yDelta <= TAP_MOVEMENT_THRESHOLD;
}
private boolean isTap()
{
long timeDelta = System.currentTimeMillis() - originalTouchTime;
return isWithinTapBounds(lastTouchX, lastTouchY) && timeDelta <= TAP_TIME_THRESHOLD;
}
private byte getMouseButtonIndex()
{
if (actionIndex == 1) {
return MouseButtonPacket.BUTTON_RIGHT;
}
else {
return MouseButtonPacket.BUTTON_LEFT;
}
}
public boolean touchDownEvent(int eventX, int eventY)
{
// Get the view dimensions to scale inputs on this touch
xFactor = referenceWidth / (double)targetView.getWidth();
yFactor = referenceHeight / (double)targetView.getHeight();
originalTouchX = lastTouchX = eventX;
originalTouchY = lastTouchY = eventY;
originalTouchTime = System.currentTimeMillis();
cancelled = confirmedDrag = confirmedMove = false;
distanceMoved = 0;
if (actionIndex == 0) {
// Start the timer for engaging a drag
startDragTimer();
}
return true;
}
public void touchUpEvent(int eventX, int eventY)
{
if (cancelled) {
return;
}
// Cancel the drag timer
cancelDragTimer();
byte buttonIndex = getMouseButtonIndex();
if (confirmedDrag) {
// Raise the button after a drag
conn.sendMouseButtonUp(buttonIndex);
}
else if (isTap())
{
// Lower the mouse button
conn.sendMouseButtonDown(buttonIndex);
// We need to sleep a bit here because some games
// do input detection by polling
try {
Thread.sleep(100);
} catch (InterruptedException ignored) {}
// Raise the mouse button
conn.sendMouseButtonUp(buttonIndex);
}
}
private synchronized void startDragTimer() {
dragTimer = new Timer(true);
dragTimer.schedule(new TimerTask() {
@Override
public void run() {
synchronized (TouchContext.this) {
// Check if someone already set move
if (confirmedMove) {
return;
}
// Check if someone cancelled us
if (dragTimer == null) {
return;
}
// Uncancellable now
dragTimer = null;
// We haven't been cancelled before the timer expired so begin dragging
confirmedDrag = true;
conn.sendMouseButtonDown(getMouseButtonIndex());
}
}
}, DRAG_TIME_THRESHOLD);
}
private synchronized void cancelDragTimer() {
if (dragTimer != null) {
dragTimer.cancel();
dragTimer = null;
}
}
private synchronized void checkForConfirmedMove(int eventX, int eventY) {
// If we've already confirmed something, get out now
if (confirmedMove || confirmedDrag) {
return;
}
// If it leaves the tap bounds before the drag time expires, it's a move.
if (!isWithinTapBounds(eventX, eventY)) {
confirmedMove = true;
cancelDragTimer();
return;
}
// Check if we've exceeded the maximum distance moved
distanceMoved += Math.sqrt(Math.pow(eventX - lastTouchX, 2) + Math.pow(eventY - lastTouchY, 2));
if (distanceMoved >= TAP_DISTANCE_THRESHOLD) {
confirmedMove = true;
cancelDragTimer();
return;
}
}
public boolean touchMoveEvent(int eventX, int eventY)
{
if (eventX != lastTouchX || eventY != lastTouchY)
{
// We only send moves and drags for the primary touch point
if (actionIndex == 0) {
checkForConfirmedMove(eventX, eventY);
int deltaX = eventX - lastTouchX;
int deltaY = eventY - lastTouchY;
// Scale the deltas based on the factors passed to our constructor
deltaX = (int)Math.round((double)Math.abs(deltaX) * xFactor);
deltaY = (int)Math.round((double)Math.abs(deltaY) * yFactor);
// Fix up the signs
if (eventX < lastTouchX) {
deltaX = -deltaX;
}
if (eventY < lastTouchY) {
deltaY = -deltaY;
}
// If the scaling factor ended up rounding deltas to zero, wait until they are
// non-zero to update lastTouch that way devices that report small touch events often
// will work correctly
if (deltaX != 0) {
lastTouchX = eventX;
}
if (deltaY != 0) {
lastTouchY = eventY;
}
conn.sendMouseMove((short)deltaX, (short)deltaY);
}
else {
lastTouchX = eventX;
lastTouchY = eventY;
}
}
return true;
}
public void cancelTouch() {
cancelled = true;
// Cancel the drag timer
cancelDragTimer();
// If it was a confirmed drag, we'll need to raise the button now
if (confirmedDrag) {
conn.sendMouseButtonUp(getMouseButtonIndex());
}
}
public boolean isCancelled() {
return cancelled;
}
}