1 | package org.openstreetmap.josm.gui;
|
---|
2 |
|
---|
3 | import java.awt.Graphics;
|
---|
4 | import java.awt.GraphicsConfiguration;
|
---|
5 | import java.awt.GraphicsEnvironment;
|
---|
6 | import java.awt.Transparency;
|
---|
7 | import java.awt.image.BufferedImage;
|
---|
8 | import java.net.URL;
|
---|
9 | import java.util.HashMap;
|
---|
10 | import java.util.Map;
|
---|
11 |
|
---|
12 | import javax.swing.Icon;
|
---|
13 | import javax.swing.ImageIcon;
|
---|
14 |
|
---|
15 | import org.openstreetmap.josm.Main;
|
---|
16 |
|
---|
17 | /**
|
---|
18 | * Helperclass to support the application with images.
|
---|
19 | * @author imi
|
---|
20 | */
|
---|
21 | public class ImageProvider {
|
---|
22 |
|
---|
23 | /**
|
---|
24 | * Position of an overlay icon
|
---|
25 | * @author imi
|
---|
26 | */
|
---|
27 | public enum OverlayPosition {NORTHWEST, NORTHEAST, SOUTHWEST, SOUTHEAST}
|
---|
28 |
|
---|
29 | /**
|
---|
30 | * The icon cache
|
---|
31 | */
|
---|
32 | private static Map<URL, Icon> cache = new HashMap<URL, Icon>();
|
---|
33 |
|
---|
34 | /**
|
---|
35 | * Return an image from the specified location.
|
---|
36 | *
|
---|
37 | * @param subdir The position of the directory, e.g. "layer"
|
---|
38 | * @param name The icons name (without the ending of ".png")
|
---|
39 | * @return The requested ImageIcon.
|
---|
40 | */
|
---|
41 | public static Icon get(String subdir, String name) {
|
---|
42 | if (subdir != "")
|
---|
43 | subdir += "/";
|
---|
44 | URL path = Main.class.getResource("/images/"+subdir+name+".png");
|
---|
45 | Icon icon = cache.get(path);
|
---|
46 | if (icon == null) {
|
---|
47 | icon = new ImageIcon(Main.class.getResource("/images/"+subdir+name+".png"));
|
---|
48 | cache.put(path, icon);
|
---|
49 | }
|
---|
50 | return icon;
|
---|
51 | }
|
---|
52 |
|
---|
53 | /**
|
---|
54 | * Shortcut for get("", name);
|
---|
55 | */
|
---|
56 | public static Icon get(String name) {
|
---|
57 | return get("", name);
|
---|
58 | }
|
---|
59 |
|
---|
60 | /**
|
---|
61 | * Return an icon that represent the overlay of the two given icons. The
|
---|
62 | * second icon is layed on the first relative to the given position.
|
---|
63 | *
|
---|
64 | * @param ground The ground icon (base)
|
---|
65 | * @param overlay The icon to put on top of the ground (overlay)
|
---|
66 | * @return The merged icon.
|
---|
67 | */
|
---|
68 | public static Icon overlay(Icon ground, Icon overlay, OverlayPosition pos) {
|
---|
69 | GraphicsConfiguration conf = GraphicsEnvironment.getLocalGraphicsEnvironment().getDefaultScreenDevice().getDefaultConfiguration();
|
---|
70 | int w = ground.getIconWidth();
|
---|
71 | int h = ground.getIconHeight();
|
---|
72 | int wo = overlay.getIconWidth();
|
---|
73 | int ho = overlay.getIconHeight();
|
---|
74 | BufferedImage img = conf.createCompatibleImage(w,h, Transparency.TRANSLUCENT);
|
---|
75 | Graphics g = img.createGraphics();
|
---|
76 | ground.paintIcon(null, g, 0, 0);
|
---|
77 | int x = 0, y = 0;
|
---|
78 | switch (pos) {
|
---|
79 | case NORTHWEST: x = 0; y = 0; break;
|
---|
80 | case NORTHEAST: x = w-wo; y = 0; break;
|
---|
81 | case SOUTHWEST: x = 0; y = h-ho; break;
|
---|
82 | case SOUTHEAST: x = w-wo; y = h-ho; break;
|
---|
83 | }
|
---|
84 | overlay.paintIcon(null, g, x, y);
|
---|
85 | return new ImageIcon(img);
|
---|
86 | }
|
---|
87 | }
|
---|