Changeset 6914 in osm for applications/editors/josm/plugins/lakewalker

Timestamp:

2008-02-18T14:00:37+01:00 (17 years ago)

Author:

jrreid

Message:

Update status text while running, and add a memory based cache to the lakewalker plugin

Location:

applications/editors/josm/plugins/lakewalker/src/org/openstreetmap/josm/plugins/lakewalker

Files:

• Lakewalker.java (modified) (6 diffs)
• LakewalkerAction.java (modified) (3 diffs)
• LakewalkerWMS.java (modified) (4 diffs)

applications/editors/josm/plugins/lakewalker/src/org/openstreetmap/josm/plugins/lakewalker/Lakewalker.java

@@ -111 +111 @@
                 int v;
                 
+                setStatus("Looking for shoreline...");
+                
                 while(true){
                         double[] geo = xy_to_geo(xy[0],xy[1],this.resolution);
@@ -136 +138 @@
                 int[] startxy = new int[] {xy[0], xy[1]};
                 double[] startgeo = xy_to_geo(xy[0],xy[1],this.resolution);
-                                
-                System.out.println("Found shore at "+startxy[0]+","+startxy[1]);
-                
+
                 System.out.printf("Found shore at lat %.4f lon %.4f\n",lat,lon);
                 
@@ -145 +145 @@
                 for(int i = 0; i < this.maxnode; i++){
                         
+                        // Print a counter
                         if(i % 250 == 0){
+                                setStatus(i+" nodes so far...");
                                 System.out.println(i+" nodes so far...");
                         }
@@ -155 +157 @@
                         int new_dir = 0;
                         
+                        // Loop through all the directions we can go
                         for(d = 1; d <= this.dirslat.length; d++){
                                 
+                                // Decide which direction we want to look at from this pixel
                                 new_dir = (last_dir + d + 4) % 8;
 
@@ -165 +169 @@
                                 
                                 if(!bbox.contains(geo[0], geo[1])){
+                                        /**
+                                         * TODO: Handle this case
+                                         */
                                         System.out.println("Outside bbox");
                                         break;
@@ -182 +189 @@
                         // Remember this direction
                         last_dir = new_dir;
+                        
+                        // Set the pixel we found as current
                         xy[0] = test_x;
                         xy[1] = test_y;
                         
+                        // Break the loop if we managed to get back to our starting point
                         if(xy[0] == startxy[0] && xy[1] == startxy[1]){
                                 break;
                         }
                         
+                        // Store this node
                         double[] geo = xy_to_geo(xy[0],xy[1],this.resolution);
                         nodelist.add(geo);
                         System.out.println("Adding node at "+xy[0]+","+xy[1]+" ("+geo[1]+","+geo[0]+")");
                         
+                        // Check if we got stuck in a loop 
                 double start_proximity = Math.pow((geo[0] - startgeo[0]),2) + Math.pow((geo[1] - startgeo[1]),2);
                 

applications/editors/josm/plugins/lakewalker/src/org/openstreetmap/josm/plugins/lakewalker/LakewalkerAction.java

@@ -150 +150 @@
          */
         
+        setStatus("Running vertex reduction...");
+        
         nodelist = lw.vertex_reduce(nodelist, epsilon);
         
@@ -155 +157 @@
         
         /**
-         * And then through douglas-peucker reduction
-         */
+         * And then through douglas-peucker approximation
+         */
+        
+        setStatus("Running Douglas-Peucker approximation...");
         
         nodelist = lw.douglas_peucker(nodelist, epsilon);
@@ -266 +270 @@
   public void mouseReleased(MouseEvent e) {
   }
-  
+  protected void setStatus(String s) {
+          Main.pleaseWaitDlg.currentAction.setText(s);
+          Main.pleaseWaitDlg.repaint();
+  }
 }

applications/editors/josm/plugins/lakewalker/src/org/openstreetmap/josm/plugins/lakewalker/LakewalkerWMS.java

@@ -11 +11 @@
 import java.awt.image.*;
 import java.awt.geom.*;
+import java.util.*;
 
 public class LakewalkerWMS {
-        
-        public LakewalkerWMS(){
-                
-        }
         
         private BufferedImage image;
         private int imagex;
         private int imagey;
+        
+        // Vector to cache images in memory
+        private Vector<BufferedImage> images = new Vector<BufferedImage>();
+        // Hashmap to hold the mapping of cached images 
+        private HashMap<String,Integer> imageindex = new HashMap<String,Integer>();
         
         public BufferedImage image2 = new BufferedImage(2000, 2000, BufferedImage.TYPE_INT_RGB);
@@ -63 +65 @@
         File file = new File(this.working_dir,filename);
         
+        // Calculate the hashmap key
+        String hashkey = Integer.toString(bottom_left_xy[0])+":"+Integer.toString(bottom_left_xy[1]);
+        
         // See if this image is already loaded
-        if(this.image != null){
+        if(this.image != null){  
                 if(this.imagex != bottom_left_xy[0] || this.imagey != bottom_left_xy[1]){
-                        this.image = null;
+                        
+                        // Check if this image exists in the hashmap
+                        if(this.imageindex.containsKey(hashkey)){
+                                // Store which image we have
+                                this.imagex = bottom_left_xy[0];
+                                this.imagey = bottom_left_xy[1];
+                                
+                                // Retrieve from cache
+                                this.image = this.images.get(this.imageindex.get(hashkey));
+                                return this.image;
+                        } else {
+                                this.image = null;
+                        }
                 } else {
                         return this.image;
@@ -73 +90 @@
         
             try {               
-                System.out.println("Looking for image in cache: "+filename);
+                System.out.println("Looking for image in disk cache: "+filename);
                 
                 // Read from a file
                 this.image = ImageIO.read(file);
             
+                this.images.add(this.image);
+                this.imageindex.put(hashkey,this.images.size()-1);
+                
             } catch(FileNotFoundException e){
                 System.out.println("Could not find cached image, downloading.");
@@ -104 +124 @@
                     }
                 
+                this.images.add(this.image);
+                this.imageindex.put(hashkey,this.images.size()-1);
+                
                 this.saveimage(file,this.image);
             }