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[Geotools-commits] CVS: geotools/src/uk/ac/leeds/ccg/widgets ScaleBar.java,1.6,1.7
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From: Ian T. <ian...@us...> - 2001-11-22 15:43:26
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Update of /cvsroot/geotools/geotools/src/uk/ac/leeds/ccg/widgets
In directory usw-pr-cvs1:/tmp/cvs-serv26683/uk/ac/leeds/ccg/widgets
Modified Files:
ScaleBar.java
Log Message:
added an option to "unproject" the scale bar if your map is in latlong - It
may not be completely correct if you are along way north/south, since the
measurement is made in the centre of the displayed map. It also assumes a
equatorial mercator project - But as a rough idea of the distances involved
its fine.
Index: ScaleBar.java
===================================================================
RCS file: /cvsroot/geotools/geotools/src/uk/ac/leeds/ccg/widgets/ScaleBar.java,v
retrieving revision 1.6
retrieving revision 1.7
diff -C2 -d -r1.6 -r1.7
*** ScaleBar.java 2001/04/02 07:47:33 1.6
--- ScaleBar.java 2001/11/22 15:43:22 1.7
***************
*** 4,17 ****
import uk.ac.leeds.ccg.geotools.*;
import uk.ac.leeds.ccg.geotools.misc.*;
public class ScaleBar extends Canvas implements ScaleChangedListener{
private final static boolean DEBUG=false;
Scaler s;
String units = "m";
boolean isSI = true;
int height = 50;
int width = 150;
public ScaleBar(Viewer v){
! if(DEBUG)System.out.println("---->uk.ac.leeds.ccg.widgets.ScaleBar constructed. Will identify itself as ScB->");
s = v.getScale();
s.addScaleChangedListener(this);
--- 4,27 ----
import uk.ac.leeds.ccg.geotools.*;
import uk.ac.leeds.ccg.geotools.misc.*;
+ import uk.ac.leeds.ccg.geotools.projections.*;
public class ScaleBar extends Canvas implements ScaleChangedListener{
private final static boolean DEBUG=false;
+ private final static String DBC="ScB:";
Scaler s;
String units = "m";
boolean isSI = true;
+ boolean isProjected = false;
int height = 50;
int width = 150;
+ ElipsoidalMercator proj;
+
+ public ScaleBar(Viewer v,boolean projf){
+ this(v);
+ isProjected=projf;
+ proj = new ElipsoidalMercator();
+ }
public ScaleBar(Viewer v){
! if(DEBUG)System.out.println("---->uk.ac.leeds.ccg.widgets.ScaleBar constructed. Will identify itself as "+DBC);
s = v.getScale();
s.addScaleChangedListener(this);
***************
*** 28,36 ****
return isSI;
}
- /** a present we'll draw a line of a fixed length and say how long it is
- * in future we should choose a nice length so as to give a round number
- * etc
- */
int ticklen = 5; // how long the ticks are
int inset =5; // distance from either end to the bar;
--- 38,48 ----
return isSI;
}
+ public void setProjected(boolean f){
+ isProjected=f;
+ }
+ public boolean getProjected(){
+ return isProjected;
+ }
int ticklen = 5; // how long the ticks are
int inset =5; // distance from either end to the bar;
***************
*** 42,53 ****
int lh = 2*h/3;
len = w - 2*inset;
! if(DEBUG)System.out.println("ScB->len = "+len+" w "+w);
! double scaledLen = s.toMap(len);
if(Double.isNaN(scaledLen)) return; // no scale in map
double fac = Math.log(scaledLen)/Math.log(10.0);
! if(DEBUG)System.out.println("ScB->len = "+scaledLen+" "+fac);
// can't just truncate for lengths less than 1!
double size = Math.pow(10.0,Math.floor(fac));
len=s.toGraphics(size);
int ticks=0;
while(len<w-2*inset){
--- 54,89 ----
int lh = 2*h/3;
len = w - 2*inset;
! if(DEBUG)System.out.println(DBC+"->len = "+len+" w "+w);
! double scaledLen;
! if(!isProjected){
! scaledLen = s.toMap(len);
! }else{
! GeoRectangle r = s.getMapExtent();
! double slen = s.toMap(len);
! double p1[] = proj.project(r.x,r.y+r.height/2.0);
! double p2[] = proj.project(r.x+slen,r.y+r.height/2.0);
! if(DEBUG){
! System.out.println(DBC+" in "+r.x+","+(r.y+r.height/2.0)+" -> "+
! (r.x+slen)+","+(r.y+r.height/2.0));
! System.out.println(DBC+" out "+p1[0]+","+p1[1]+" "+p2[0]+","+p2[1]);
! }
!
! scaledLen = (p2[0]-p1[0])*1000; // proj is in km
! }
!
if(Double.isNaN(scaledLen)) return; // no scale in map
double fac = Math.log(scaledLen)/Math.log(10.0);
! if(DEBUG)System.out.println(DBC+"->len = "+scaledLen+" "+fac);
// can't just truncate for lengths less than 1!
double size = Math.pow(10.0,Math.floor(fac));
len=s.toGraphics(size);
+ if(DEBUG)System.out.println(DBC+" size "+size+" len "+len+" fac "+fac);
+ int fudge=0;
+ while(len>w){
+ size = Math.pow(10.0,Math.floor(--fac));
+ fudge++;
+ len=s.toGraphics(size);
+ if(DEBUG)System.out.println(DBC+" size "+size+" len "+len+" fac "+fac);
+ }
int ticks=0;
while(len<w-2*inset){
***************
*** 64,69 ****
len=s.toGraphics(size*ticks);
scaledLen = size*ticks;
! if(DEBUG)System.out.println("ScB->len = "+len+" slen "+scaledLen+" size "+size);
String tunits=units;
if(isSI&&scaledLen>1000.0){
size/=1000.0;
--- 100,116 ----
len=s.toGraphics(size*ticks);
scaledLen = size*ticks;
! if(DEBUG)System.out.println(DBC+"->len = "+len+" slen "+scaledLen+" size "+size);
String tunits=units;
+
+ if(isProjected&&fudge>0){
+ if(DEBUG)System.out.println(DBC+"fudge = "+fudge+" size " + size +
+ "slen "+scaledLen);
+ while(fudge-->0){
+ size*=10.0;
+ scaledLen*=10.0;
+ }
+ if(DEBUG)System.out.println(DBC+"fudge = "+fudge+" size " + size +
+ "slen "+scaledLen);
+ }
if(isSI&&scaledLen>1000.0){
size/=1000.0;
***************
*** 72,81 ****
}
-
g.drawLine(inset,lh,inset+len,lh);
double tlen = len/(double)ticks;
! if(DEBUG)System.out.println("ScB->ticks "+ticks+" "+tlen);
int step =1;
- if(ticks>=4) step=2;
if(ticks>=6) step =3;
if(ticks>=8) step = 4;
--- 119,126 ----
}
g.drawLine(inset,lh,inset+len,lh);
double tlen = len/(double)ticks;
! if(DEBUG)System.out.println(DBC+"->ticks "+ticks+" "+tlen);
int step =1;
if(ticks>=6) step =3;
if(ticks>=8) step = 4;
***************
*** 84,87 ****
--- 129,133 ----
g.drawLine(inset+(int)Math.round(tlen*i),lh,inset+(int)Math.round(tlen*i),lh+ticklen);
if(i%step==0||i==ticks){
+ // should work out length of string (size*i) and centre label
g.drawString(""+size*i,(int)(tlen*i),h);
g.drawLine((int)Math.round(inset+tlen*i),lh-ticklen,(int)Math.round(inset+tlen*i),lh);
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