WebSVN - AndroidProjects - Blame - Rev 45 - /pingK2/src/com/gebauz/pingK/MultitouchInput.java

Rev	Author	Line No.	Line
32	chris	1	package com.gebauz.pingK;
		2
		3	import java.util.Vector;
		4
		5	import android.view.MotionEvent;
		6
42	chris	7	/** Multitouch Handling Class.
		8	* Note that all internal coordinates are converted from Android screen space into virtual screen space
		9	* (depending on the virtual width/height ratio set).
		10	*/
32	chris	11	public class MultitouchInput
		12	{
		13	public class Finger
		14	{
		15	private int mID;
42	chris	16	private boolean mIsNew = true; // newly pressed
32	chris	17	public float x = 0;
		18	public float y = 0;
		19
		20	public Finger(int id, float _x, float _y)
		21	{
		22	mID = id;
		23	x = _x;
		24	y = _y;
		25	}
		26
42	chris	27	/** true when touch has been added in the last frame. */
		28	public final boolean isNew()
32	chris	29	{
42	chris	30	return mIsNew;
32	chris	31	}
		32
45	chris	33	public final void update(float deltaTime)
32	chris	34	{
42	chris	35	mIsNew = false;
32	chris	36	}
		37
		38	public final void setID(int id)
		39	{
		40	mID = id;
		41	}
		42
		43	public final int getID()
		44	{
		45	return mID;
		46	}
42	chris	47
		48	public final boolean isInside(float x1, float y1, float x2, float y2)
		49	{
43	chris	50	boolean isInsideX = ((x >= x1) && (x <= x2)) /\|\| ((x >= x2) && (x <= x1))/;
		51	boolean isInsideY = ((y >= y1) && (y <= y2)) /\|\| ((y >= y2) && (y <= y1))/;
42	chris	52
43	chris	53	return isInsideX && isInsideY;
42	chris	54	}
32	chris	55	}
		56
		57	public static final int MAX_TOUCH_POINTS = 10;
		58
		59	private static MultitouchInput mInstance = new MultitouchInput();
		60
		61	private Vector<Finger> mTouchPoints = new Vector<Finger>();
		62
42	chris	63	/** The ratio of virtual width to actual screen width. */
		64	private float mVirtualWidthRatio = 1.0f;
		65
		66	/** The ratio of virtual width to actual screen width. */
		67	private float mVirtualHeightRatio = 1.0f;
		68
32	chris	69	private MultitouchInput()
		70	{
		71	}
		72
		73	public static MultitouchInput getInstance()
		74	{
		75	return mInstance;
		76	}
		77
		78	public void clearTouchPoints()
		79	{
		80	mTouchPoints.clear();
		81	}
		82
		83	public void addTouchPoint(int id, float x, float y)
		84	{
		85	mTouchPoints.add(new Finger(id, x, y));
		86	}
		87
		88	public void removeTouchPoint(int id)
		89	{
		90	for (int i = 0; i < mTouchPoints.size(); i++)
		91	{
		92	if (mTouchPoints.get(i).getID() == id)
		93	{
		94	mTouchPoints.remove(i);
		95	}
		96	}
		97	}
		98
		99	public Finger getTouchPoint(int id)
		100	{
		101	for (int i = 0; i < mTouchPoints.size(); i++)
		102	{
		103	if (mTouchPoints.get(i).getID() == id)
		104	{
		105	return mTouchPoints.get(i);
		106	}
		107
		108	}
		109	return null;
		110	}
		111
42	chris	112	/** Get a touchpoint inside a rectangle spanned by (x1, y1) to (x2, y2) */
		113	public Finger getTouchPointInside(float x1, float y1, float x2, float y2)
		114	{
		115	for (int i = 0; i < mTouchPoints.size(); i++)
		116	{
		117	Finger finger = mTouchPoints.get(i);
		118	if (finger.isInside(x1, y1, x2, y2))
		119	{
		120	return finger;
		121	}
		122	}
		123
		124	// none found
		125	return null;
		126	}
		127
32	chris	128	public void handleInput(MotionEvent event)
		129	{
		130	int action = event.getAction() & MotionEvent.ACTION_MASK;
		131	//int id = (event.getAction() & MotionEvent.ACTION_POINTER_INDEX_MASK) >> MotionEvent.ACTION_POINTER_INDEX_SHIFT;
		132	int index = (event.getAction() & MotionEvent.ACTION_POINTER_ID_MASK) >> MotionEvent.ACTION_POINTER_ID_SHIFT;
		133	switch (action)
		134	{
		135	case MotionEvent.ACTION_DOWN:
		136	// start new touch operation
		137
		138	clearTouchPoints();
42	chris	139	addTouchPoint(event.getPointerId(index), event.getX() * mVirtualWidthRatio, event.getY() * mVirtualWidthRatio);
32	chris	140
		141	break;
		142	case MotionEvent.ACTION_UP:
		143	case MotionEvent.ACTION_CANCEL:
		144	// stop all touch operations
		145
		146	clearTouchPoints();
		147
		148	break;
		149	case MotionEvent.ACTION_MOVE:
		150	// update positions
		151
		152	for (int i = 0; i < event.getPointerCount(); i++)
		153	{
		154	Finger finger = getTouchPoint(event.getPointerId(i));
42	chris	155	finger.x = event.getX(i) * mVirtualWidthRatio;
		156	finger.y = event.getY(i) * mVirtualHeightRatio;
32	chris	157	}
		158
		159	break;
		160	case MotionEvent.ACTION_POINTER_DOWN:
		161	// add new touch point
		162	addTouchPoint(event.getPointerId(index), event.getX(), event.getY());
		163
		164	break;
		165	case MotionEvent.ACTION_POINTER_UP:
		166	// remove touch point
		167	removeTouchPoint(event.getPointerId(index));
		168
		169	break;
		170	}
		171
		172	/* if ((event.getAction() == MotionEvent.ACTION_UP) \|\|
		173	(event.getAction() == MotionEvent.ACTION_CANCEL))
		174	{
		175	// all up -> clear points
		176	for (int i = 0; i < MAX_TOUCH_POINTS; i++)
		177	{
		178	mFingers[i].setState(false, -1, -1);
		179	mFingers[i].setID(-1);
		180	}
		181	}
		182	else
		183	{
		184	// assign points
		185	int pointerCount = event.getPointerCount();
		186
		187	for (int i = 0; i < pointerCount; i++)
		188	{
		189	int id = event.getPointerId(i);
		190
		191	int indexForId = findIndexForID(id);
		192
		193	{
		194
		195	}
		196	}
		197	} */
		198	}
		199
		200	/** Find the index in our own array that corresponds to a certain pointer ID */
		201	/* private int findIndexForID(int id)
		202	{
		203	for (int i = 0; i < MAX_TOUCH_POINTS; i++)
		204	{
		205	if (mFingers[i].getID() == id)
		206	return i;
		207	}
		208	return -1;
		209	}*/
		210
		211	/** Find the next free index that has no ID yet */
		212	/* private int getNextFreeIndex()
		213	{
		214	return findIndexForID(-1);
		215	}*/
		216
45	chris	217	public void update(float deltaTime)
32	chris	218	{
43	chris	219	for (int i = 0; i < mTouchPoints.size(); i++)
		220	{
		221	Finger finger = mTouchPoints.get(i);
45	chris	222	finger.update(deltaTime);
43	chris	223	}
32	chris	224	}
		225
		226	public void render()
		227	{
		228
42	chris	229	}
32	chris	230
42	chris	231	/** Set the ratio (virtual screen size)/(actual screen size) */
		232	public void setVirtualScreenRatio(float widthRatio, float heightRatio)
		233	{
		234	mVirtualWidthRatio = widthRatio;
		235	mVirtualHeightRatio = heightRatio;
		236	}
		237
32	chris	238	String getDebugText()
		239	{
		240	StringBuffer str = new StringBuffer();
		241	str.append("TOUCH STATISTICS:\n");
		242	for (int i = 0; i < mTouchPoints.size(); i++)
		243	{
		244	Finger finger = mTouchPoints.get(i);
		245	str.append("[" + finger.getID() + "] - (" + finger.x + ", " + finger.y + ")\n");
		246	}
		247
		248	return str.toString();
		249	}
		250
		251	}
		252
		253
		254

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