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 void run() {
int x, y;
Bitmap locTile;
Canvas canvas;
float useLon, useLat, useLonMax, useLatMax;
System.gc();
if ((useOverlay.tileX == 0) && (useOverlay.tileY == 0)) return;
mapThreadRunning = true;
try {
if (locMap == null)
locMap = Bitmap.createBitmap(tileWidth * 256, tileHeight * 256, Bitmap.Config.ARGB_8888);
} catch (OutOfMemoryError oome) {
return;
}
locMap.eraseColor(Color.BLACK);
canvas = new Canvas(locMap);
useLon =
(GeoUtils.tilex2long(useOverlay.tileX, useOverlay.m_zoom)
+ GeoUtils.tilex2long(useOverlay.tileX + 1, useOverlay.m_zoom))
/ 2.0f;
useLat =
(GeoUtils.tiley2lat(useOverlay.tileY, useOverlay.m_zoom)
+ GeoUtils.tiley2lat(useOverlay.tileY + 1, useOverlay.m_zoom))
/ 2.0f;
while (mScaleFactor >= 2.0) {
mScaleFactor /= 2.0f;
useOverlay.m_zoom++;
if (useOverlay.m_zoom > 17) {
useOverlay.m_zoom = 17;
imgOffsetX -= (scrWidth - (scrWidth * 2.0)) / 2.0;
imgOffsetY -= (scrHeight - (scrHeight * 2.0)) / 2.0;
}
}
while (mScaleFactor <= 0.5) {
mScaleFactor *= 2.0f;
useOverlay.m_zoom--;
if (useOverlay.m_zoom < 3) {
useOverlay.m_zoom = 3;
imgOffsetX -= (scrWidth - (scrWidth * 2.0)) / 2.0;
imgOffsetY -= (scrHeight - (scrHeight * 2.0)) / 2.0;
}
}
mScaleFactor = 1.0f;
/* if ((wasScaleOp) && (lonCenter!=0.0f) && (latCenter!=0.0f))
{
tileX=GeoUtils.long2tilex(lonCenter,m_zoom);
tileY=GeoUtils.lat2tiley(latCenter,m_zoom);
tileX-=(scrWidth / 256);
tileY-=(scrWidth / 256);
}
else*/
{
useOverlay.tileX = GeoUtils.long2tilex(useLon, useOverlay.m_zoom);
useOverlay.tileY = GeoUtils.lat2tiley(useLat, useOverlay.m_zoom);
}
useLon = GeoUtils.tilex2long(useOverlay.tileX - 1, useOverlay.m_zoom);
useLat = GeoUtils.tiley2lat(useOverlay.tileY - 1, useOverlay.m_zoom);
useLonMax = GeoUtils.tilex2long(useOverlay.tileX + tileWidth + 1, useOverlay.m_zoom);
useLatMax = GeoUtils.tiley2lat(useOverlay.tileY + tileHeight + 1, useOverlay.m_zoom);
/* if (imgOffsetX>scrWidth)
{
imgOffsetX=scrWidth/2;
}
if (imgOffsetX<=-scrWidth)
{
imgOffsetX=-scrWidth/2;
}
if (imgOffsetY>scrHeight)
{
imgOffsetY=scrHeight/2;
}
if (imgOffsetY<=-scrHeight)
{
imgOffsetY=-scrHeight/2;
}*/
while (imgOffsetX > 0) {
imgOffsetX -= 256.0f;
useOverlay.tileX--;
}
while (imgOffsetX <= -256.0) {
imgOffsetX += 256.0f;
useOverlay.tileX++;
}
while (imgOffsetY > 0) {
imgOffsetY -= 256.0f;
useOverlay.tileY--;
}
while (imgOffsetY <= -256.0) {
imgOffsetY += 256.0f;
useOverlay.tileY++;
}
// calculate lat/lon of screen center point
/* {
int useTileX=tileX,useTileY=tileY;
x=(int)((scrWidth/2.0f)+imgOffsetX);
y=(int)((scrHeight/2.0f)+imgOffsetY);
useTileX+=(x / 256);
x=x % 256;
useTileY+=(y / 256);
y=y % 256;
float tileLon1=GeoUtils.tilex2long(useTileX,m_zoom);
float tileLat1=GeoUtils.tiley2lat(useTileY,m_zoom);
float tileLon2=GeoUtils.tilex2long(useTileX+1,m_zoom);
float tileLat2=GeoUtils.tiley2lat(useTileY+1,m_zoom);
lonCenter=(((tileLon2-tileLon1)/256.0f)*x)+tileLon1;
latCenter=(((tileLat2-tileLat1)/256.0f)*y)+tileLat1;
}*/
matrix.setTranslate(imgOffsetX, imgOffsetY);
breakMapThread = false;
mapThreadRunning = false;
for (x = 0; x < tileWidth; x++)
for (y = 0; y < tileHeight; y++) {
if (breakMapThread) return;
locTile =
geoUtils.loadMapTile(
getContext(),
useOverlay.tileX + x,
useOverlay.tileY + y,
useOverlay.m_zoom,
allowNetAccess);
if (locTile != null) canvas.drawBitmap(locTile, x * 256, y * 256, null);
postInvalidate();
}
useOverlay.doDraw(canvas, useLon, useLonMax, useLat, useLatMax, locMap);
postInvalidate();
System.gc();
}
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;
}
