From 75d88355491fd6ab8fe625b414c20836dc15e53b Mon Sep 17 00:00:00 2001
From: sjtufs <sjtu_fs@outlook.com>
Date: Mon, 26 Aug 2013 12:48:17 +0800
Subject: add basic touch controller

---
 .../com/macaroon/piztor/MultiTouchListener.java    | 102 +++++++++++++++++++++
 1 file changed, 102 insertions(+)
 create mode 100644 client/Piztor/src/com/macaroon/piztor/MultiTouchListener.java

diff --git a/client/Piztor/src/com/macaroon/piztor/MultiTouchListener.java b/client/Piztor/src/com/macaroon/piztor/MultiTouchListener.java
new file mode 100644
index 0000000..2bd379d
--- /dev/null
+++ b/client/Piztor/src/com/macaroon/piztor/MultiTouchListener.java
@@ -0,0 +1,102 @@
+package com.macaroon.piztor;
+
+import android.app.Activity;
+import android.graphics.Matrix;
+import android.graphics.PointF;
+import android.os.Bundle;
+import android.os.SystemClock;
+import android.util.FloatMath;
+import android.util.Log;
+import android.view.MotionEvent;
+import android.view.View;
+import android.view.View.OnTouchListener;
+import android.view.GestureDetector;
+import android.view.GestureDetector.SimpleOnGestureListener;
+import android.widget.ImageView;
+
+public class MultiTouchListener implements OnTouchListener {
+
+	private Matrix matrix = new Matrix();
+	private Matrix preMatrix = new Matrix();
+
+	private static final int NONE = 0;
+	private static final int DRAG = 1;
+	private static final int ZOOM = 2;
+	private int mode = NONE;
+
+	private PointF start = new PointF();
+	private PointF mid = new PointF();
+	private float preDis = 1f;
+	private float d = 0f;
+	private float newRot = 0f;
+	private float[] values;
+	
+	@Override
+	public boolean onTouch(View v, MotionEvent event) {
+		float[] values = new float[9];
+        matrix.getValues(values);
+        //System.out.println("1111111"+values[1]);
+		//Log.d("Touch", "onTouch.......");
+		ImageView view = (ImageView) v;
+		switch (event.getAction() & MotionEvent.ACTION_MASK) {
+			case MotionEvent.ACTION_DOWN:
+				//Log.d("Touch", "ACTION_DOWN");
+				preMatrix.set(matrix);
+				start.set(event.getX(), event.getY());
+				mode = DRAG;
+				break;
+			case MotionEvent.ACTION_POINTER_DOWN:
+				//Log.d("Touch", "ACTION_POINTER_DOWN");
+				preDis = spacing(event);
+				if(preDis > 10f) {
+					preMatrix.set(matrix);
+					midPoint(mid, event);
+					mode = ZOOM;
+				}
+				break;
+			case MotionEvent.ACTION_UP:
+				//Log.d("Touch", "ACTION_UP");
+			case MotionEvent.ACTION_POINTER_UP:
+				//Log.d("Touch", "ACTION_POINTER_UP");
+				mode = NONE;
+				break;
+			case MotionEvent.ACTION_MOVE:
+				//Log.d("Touch", "ACTION_MOVE");
+				if(mode == DRAG) {
+					//Log.d("Touch", "Draging");
+					matrix.set(preMatrix);
+					float dx = event.getX() - start.x;
+					float dy = event.getY() - start.y;
+					matrix.postTranslate(dx, dy);
+				} else if (mode == ZOOM) {
+					//Log.d("Touch","Zooming");
+					float newDis = spacing(event);
+					if (newDis > 10f) {
+						matrix.set(preMatrix);
+						float scale = (newDis / preDis);
+						matrix.postScale(scale,scale,mid.x,mid.y);
+						//System.out.println("ssssssssssssssssss" + scale);
+					}
+				}
+				break;
+		}
+		matrix.getValues(values);
+        //System.out.println("222222"+values[1]);
+		view.setImageMatrix(matrix);
+		matrix.getValues(values);
+        //System.out.println("333333"+values[1]);
+		return true;
+	}
+
+	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);
+	}
+
+	private void midPoint(PointF point, MotionEvent event) {
+		float x = event.getX(0) + event.getY(1);
+		float y = event.getY(0) + event.getY(1);
+		point.set(x / 2, y / 2);
+	}
+}
-- 
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