Changeset 7343 in osm for applications/editors/josm/plugins/slippy_map_chooser/src/OsmTile.java

Timestamp:

2008-04-12T15:59:42+02:00 (17 years ago)

Author:

tim

Message:

CHANGED slippy_map_chooser:

• Tried to fix ticket #629 and #599 (IllegalArgumentException when zooming on Japan)

ADDED to slippy_map_chooser:

• Patch (Ticket #678): Zooming doesn't take cursor location into consideration (now it does thanks to Johannes Rudolph)
• Patch (Ticket #678): When zooming use parent tiles while new tiles are loading (by Johannes Rudolph)

File:

• applications/editors/josm/plugins/slippy_map_chooser/src/OsmTile.java (modified) (4 diffs)

applications/editors/josm/plugins/slippy_map_chooser/src/OsmTile.java

@@ -1 +1 @@
 // License: GPL. Copyright 2007 by Tim Haussmann
 
+import java.awt.geom.AffineTransform;
 import java.awt.image.BufferedImage;
 import java.awt.Color;
 import java.awt.Graphics;
+import java.awt.Graphics2D;
+import java.awt.RenderingHints;
+import java.awt.Shape;
 
 /**
@@ -48 +52 @@
         }
         
-        public void paint(Graphics g){
+        public void paint(Graphics g,TileDB db){
                 
                 if(iMapImage != null && ! isInvalid){
@@ -57 +61 @@
                 }
                 else{
-                        g.setColor(Color.RED);
-                        g.drawLine(iX, iY, iX+WIDTH-1, iY+HEIGHT-1);
-                        g.drawLine(iX, iY+HEIGHT-1, iX+WIDTH-1, iY);
-                        g.drawRect(iX, iY, WIDTH-1, HEIGHT-1);
+                        // first try to interpolate tile from parent                    
+                        OsmTile parent = getParent(db);
+                        if (parent!=null){
+                                Graphics2D g2d = (Graphics2D) g;
+                                AffineTransform oldTr = g2d.getTransform();
+                                Shape oldClip = g2d.getClip();
+                                g2d.setRenderingHint(RenderingHints.KEY_INTERPOLATION, RenderingHints.VALUE_INTERPOLATION_BICUBIC);
+                                
+                                // since the parent will paint 4 tiles in the 
+                                // current zoom level we have to clip the drawing
+                                // region to the current tile
+                                g2d.clipRect(iX, iY, WIDTH, HEIGHT);
+                                g2d.scale(2, 2);                                
+                                parent.paint(g,db);
+                                
+                                g2d.setTransform(oldTr);
+                                g2d.setClip(oldClip);
+                        }
+                        else{
+                                // otherwise draw placeholder
+                                g.setColor(Color.RED);
+                                g.drawLine(iX, iY, iX+WIDTH-1, iY+HEIGHT-1);
+                                g.drawLine(iX, iY+HEIGHT-1, iX+WIDTH-1, iY);
+                                g.drawRect(iX, iY, WIDTH-1, HEIGHT-1);
+                        }
                 }
         } 
@@ -93 +118 @@
         }
         
+        public OsmTile getParent(TileDB db){
+                return iZoomLevel == 0 ? null : db.get(parentKey());
+        }
+
+        public String parentKey() {
+                return key(iZoomLevel - 1,iIndexX/2,iIndexY/2);
+        }
 }