1 | asclass ImageSurfaceTool > MouseAdapter {
|
2 | ImageSurface is; |
3 | Point startingPoint; |
4 | bool enabled = true; |
5 | static bool verbose = false; |
6 | |
7 | *(ImageSurface is) {
|
8 | register(is); |
9 | } |
10 | |
11 | bool isMouseHandler() { true; }
|
12 | |
13 | void register(ImageSurface is) {
|
14 | this.is = is; |
15 | is.removeMouseHandlers(); |
16 | is.setMouseHandler(this); |
17 | } |
18 | |
19 | void remove() {
|
20 | for (ImageSurfaceSelector s : collectInstances(is.tools, ImageSurfaceSelector)) {
|
21 | is.removeMouseListener(s); |
22 | is.removeMouseMotionListener(s); |
23 | is.tools.remove(s); |
24 | } |
25 | } |
26 | |
27 | |
28 | |
29 | public void mousePressed(MouseEvent evt) {
|
30 | if (verbose) print("mousePressed");
|
31 | if (evt.getButton() != MouseEvent.BUTTON1) return; |
32 | if (enabled) |
33 | startingPoint = getPoint(evt); |
34 | } |
35 | |
36 | public void mouseDragged(MouseEvent e) {
|
37 | if (verbose) print("mouseDragged");
|
38 | if (startingPoint != null) {
|
39 | Point endPoint = getPoint(e); |
40 | Rectangle r = new Rectangle(startingPoint, new Dimension(endPoint.x-startingPoint.x+1, endPoint.y-startingPoint.y+1)); |
41 | normalize(r); |
42 | r.width = min(r.width, is.getImage().getWidth()-r.x); |
43 | r.height = min(r.height, is.getImage().getHeight()-r.y); |
44 | is.setSelection(r); |
45 | } |
46 | if (verbose) print("mouseDragged done");
|
47 | } |
48 | |
49 | public static void normalize(Rectangle r) {
|
50 | if (r.width < 0) {
|
51 | r.x += r.width; |
52 | r.width = -r.width; |
53 | } |
54 | if (r.height < 0) {
|
55 | r.y += r.height; |
56 | r.height = -r.height; |
57 | } |
58 | } |
59 | |
60 | public void mouseReleased(MouseEvent e) {
|
61 | if (verbose) print("mouseReleased");
|
62 | mouseDragged(e); |
63 | if (getPoint(e).equals(startingPoint)) |
64 | is.setSelection((Rectangle) null); |
65 | startingPoint = null; |
66 | } |
67 | |
68 | Point getPoint(MouseEvent e) {
|
69 | return new Point((int) (e.getX()/is.getZoomX()), (int) (e.getY()/is.getZoomY())); |
70 | } |
71 | } |
Began life as a copy of #1005517
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| Snippet ID: | #1033785 |
| Snippet name: | ImageSurfaceTool - a mouse handler for ImageSurface [dev.] |
| Eternal ID of this version: | #1033785/1 |
| Text MD5: | 8d3554b29126a6d4bbaad195a8d28d85 |
| Author: | stefan |
| Category: | javax / gui |
| Type: | JavaX fragment (include) |
| Public (visible to everyone): | Yes |
| Archived (hidden from active list): | No |
| Created/modified: | 2022-01-04 19:53:10 |
| Source code size: | 1896 bytes / 71 lines |
| Pitched / IR pitched: | No / No |
| Views / Downloads: | 126 / 138 |
| Referenced in: | [show references] |