org.eclipse.swt.snippets.Snippet9 source code

1 #!/usr/bin/env dub
2 /+
3 dub.sdl:
4     name "snippet9"
5     dependency "dwt" path="../../../../../../"
6     libs \
7       "atk-1.0" \
8       "cairo" \
9       "dl" \
10       "fontconfig" \
11       "gdk-x11-2.0" \
12       "gdk_pixbuf-2.0" \
13       "glib-2.0" \
14       "gmodule-2.0" \
15       "gnomeui-2" \
16       "gnomevfs-2" \
17       "gobject-2.0" \
18       "gthread-2.0" \
19       "gtk-x11-2.0" \
20       "pango-1.0" \
21       "pangocairo-1.0" \
22       "X11" \
23       "Xcomposite" \
24       "Xcursor" \
25       "Xdamage" \
26       "Xext" \
27       "Xfixes" \
28       "Xi" \
29       "Xinerama" \
30       "Xrandr" \
31       "Xrender" \
32       "Xtst" \
33       platform="linux"
34 +/
35 
36 /*******************************************************************************
37  * Copyright (c) 2000, 2004 IBM Corporation and others.
38  * All rights reserved. This program and the accompanying materials
39  * are made available under the terms of the Eclipse Public License v1.0
40  * which accompanies this distribution, and is available at
41  * http://www.eclipse.org/legal/epl-v10.html
42  *
43  * Contributors:
44  *     IBM Corporation - initial API and implementation
45  * D Port
46  *     Jesse Phillips <Jesse.K.Phillips+D> gmail.com
47  *******************************************************************************/
48 module org.eclipse.swt.snippets.Snippet9;
49 
50 /*
51  * Composite example snippet: scroll a child control automatically
52  *
53  * For a list of all SWT example snippets see
54  * http://www.eclipse.org/swt/snippets/
55  */
56 import org.eclipse.swt.SWT;
57 import org.eclipse.swt.events.PaintListener;
58 import org.eclipse.swt.graphics.Color;
59 import org.eclipse.swt.graphics.Point;
60 import org.eclipse.swt.graphics.Rectangle;
61 import org.eclipse.swt.widgets.Composite;
62 import org.eclipse.swt.widgets.Display;
63 import org.eclipse.swt.widgets.Event;
64 import org.eclipse.swt.widgets.Listener;
65 import org.eclipse.swt.widgets.ScrollBar;
66 import org.eclipse.swt.widgets.Shell;
67 import java.lang.all;
68 
69 void main () {
70     auto display = new Display ();
71     auto shell = new Shell
72        (display, SWT.SHELL_TRIM | SWT.H_SCROLL | SWT.V_SCROLL);
73     auto composite = new Composite (shell, SWT.BORDER);
74     composite.setSize (700, 600);
75     auto red = display.getSystemColor (SWT.COLOR_RED);
76     composite.addPaintListener (new class PaintListener {
77         public void paintControl (PaintEvent e) {
78             e.gc.setBackground (red);
79             e.gc.fillOval (5, 5, 690, 590);
80         }
81     });
82     auto hBar = shell.getHorizontalBar ();
83     hBar.addListener (SWT.Selection, new class Listener {
84         public void handleEvent (Event e) {
85             auto location = composite.getLocation ();
86             location.x = -hBar.getSelection ();
87             composite.setLocation (location);
88         }
89     });
90     ScrollBar vBar = shell.getVerticalBar ();
91     vBar.addListener (SWT.Selection, new class Listener {
92         public void handleEvent (Event e) {
93             Point location = composite.getLocation ();
94             location.y = -vBar.getSelection ();
95             composite.setLocation (location);
96         }
97     });
98     shell.addListener (SWT.Resize,  new class Listener {
99         public void handleEvent (Event e) {
100             Point size = composite.getSize ();
101             Rectangle rect = shell.getClientArea ();
102             hBar.setMaximum (size.x);
103             vBar.setMaximum (size.y);
104             hBar.setThumb (Math.min (size.x, rect.width));
105             vBar.setThumb (Math.min (size.y, rect.height));
106             int hPage = size.x - rect.width;
107             int vPage = size.y - rect.height;
108             int hSelection = hBar.getSelection ();
109             int vSelection = vBar.getSelection ();
110             Point location = composite.getLocation ();
111             if (hSelection >= hPage) {
112                 if (hPage <= 0) hSelection = 0;
113                 location.x = -hSelection;
114             }
115             if (vSelection >= vPage) {
116                 if (vPage <= 0) vSelection = 0;
117                 location.y = -vSelection;
118             }
119             composite.setLocation (location);
120         }
121     });
122     shell.open ();
123     while (!shell.isDisposed()) {
124         if (!display.readAndDispatch ()) display.sleep ();
125     }
126     display.dispose ();
127 }