xiaoyan159/vtm
1
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

also update on scale changes

Browse Source
This commit is contained in:
Hannes Janetzek 2013-05-01 03:42:00 +02:00
parent 18fdbd07d7
commit c682ae518c
1 changed files with 7 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

12
src/org/oscim/layers/overlay/MapScaleBar.java
View File

@ -71,6 +71,7 @@ public class MapScaleBar extends Layer {
private final Canvas mMapScaleCanvas;
private boolean mRedrawNeeded;
private double mPrevLatitude = -1;
private final double mPrevScale = -1;
private final Map<TextField, String> mTextFields;
/* private */final Bitmap mMapScaleBitmap;
@ -125,15 +126,17 @@ public class MapScaleBar extends Layer {
};
}
@Override
public void onUpdate(MapPosition mapPosition, boolean changed) {
double latitude = MercatorProjection.toLatitude(mapPosition.y);
if (!mRedrawNeeded) {
double latitudeDiff = Math.abs(mPrevLatitude - latitude);
if (latitudeDiff < LATITUDE_REDRAW_THRESHOLD)
return;
double scaleDiff = mPrevScale / mapPosition.scale;
if (scaleDiff < 1.1 && scaleDiff > 0.9) {
double latitudeDiff = Math.abs(mPrevLatitude - latitude);
if (latitudeDiff < LATITUDE_REDRAW_THRESHOLD)
return;
}
}
mPrevLatitude = latitude;
@ -166,7 +169,6 @@ public class MapScaleBar extends Layer {
mRedrawNeeded = false;
}
/**
* @return true if imperial units are used, false otherwise.
*/