public void onClick(View v) {
if (v == zoomInButton) {
if (mapThreadRunning) return; // no updates when download is running
float w, h;
mScaleFactor *= 2.0;
matrix.postScale(2.0f, 2.0f);
w = scrWidth / 2.0f;
h = scrHeight / 2.0f;
matrix.postTranslate(-w, -h);
imgOffsetX -= w;
imgOffsetY -= h;
breakMapThread = true;
restartMap();
} else if (v == zoomOutButton) {
if (mapThreadRunning) return; // no updates when download is running
float w, h;
mScaleFactor *= 0.5;
matrix.postScale(0.5f, 0.5f);
w = scrWidth * 2.0f;
h = scrHeight * 2.0f;
matrix.postTranslate(w, h);
imgOffsetX += w;
imgOffsetY += h;
breakMapThread = true;
restartMap();
}
updateUI(true);
}
public boolean onTouchEvent(MotionEvent ev) {
if (mapThreadRunning) return false; // no updates when download is running
if (gestureDetector.onTouchEvent(ev)) return true;
final int action = ev.getAction();
switch (action & MotionEvent.ACTION_MASK) {
case MotionEvent.ACTION_DOWN:
{
mLastTouchX = ev.getX();
mLastTouchY = ev.getY();
mActivePointerId = ev.getPointerId(0);
break;
}
case MotionEvent.ACTION_POINTER_DOWN:
{
mLastTouchX2 = ev.getX();
mLastTouchY2 = ev.getY();
if (ev.getPointerCount() > 1) mActivePointerId2 = ev.getPointerId(1);
break;
}
case MotionEvent.ACTION_MOVE:
{
int pointerIndex;
float x = 0.0f, y = 0.0f;
try {
if ((mActivePointerId != INVALID_POINTER_ID)
|| (mActivePointerId2 != INVALID_POINTER_ID)) {
pointerIndex = ev.findPointerIndex(mActivePointerId);
x = ev.getX(pointerIndex);
y = ev.getY(pointerIndex);
}
if ((mActivePointerId != INVALID_POINTER_ID)
&& (mActivePointerId2 != INVALID_POINTER_ID)) {
double d1, d2;
pointerIndex = ev.findPointerIndex(mActivePointerId2);
if (pointerIndex < 0) return false;
float x2 = ev.getX(pointerIndex);
float y2 = ev.getY(pointerIndex);
d1 = java.lang.Math.sqrt((x - x2) * (x - x2) + (y - y2) * (y - y2));
d2 =
java.lang.Math.sqrt(
(mLastTouchX - mLastTouchX2) * (mLastTouchX - mLastTouchX2)
+ (mLastTouchY - mLastTouchY2) * (mLastTouchY - mLastTouchY2));
/* if ((Math.abs(d1)>300) || (Math.abs(d2)>300))
{
int i=0;
i=i;
}*/
if ((d1 > 0) && (d2 > 0)) {
float w, h, s;
s = (float) (d1 / d2);
mScaleFactor *= s;
matrix.postScale(s, s);
w = scrWidth / 2.0f;
h = scrHeight / 2.0f;
matrix.postTranslate(w, h);
imgOffsetX += w;
imgOffsetY += h;
}
mLastTouchX2 = x2;
mLastTouchY2 = y2;
} else if (mScaleFactor == 1.0) {
mScaleFactor = 1.0f;
imgOffsetX += (x - mLastTouchX);
imgOffsetY += (y - mLastTouchY);
matrix.setTranslate(imgOffsetX, imgOffsetY);
}
if ((mActivePointerId != INVALID_POINTER_ID)
|| (mActivePointerId2 != INVALID_POINTER_ID)) {
mLastTouchX = x;
mLastTouchY = y;
}
} catch (Exception e) {
// can be caused by
// pointerIndex= ev.findPointerIndex(mActivePointerId);
// x= ev.getX(pointerIndex);
// above which seems to be a Android bug
}
invalidate();
break;
}
case MotionEvent.ACTION_UP:
case MotionEvent.ACTION_POINTER_UP:
{
breakMapThread = true;
mActivePointerId = INVALID_POINTER_ID;
mActivePointerId2 = INVALID_POINTER_ID;
restartMap();
break;
}
}
return true;
}