1 /***
2 * Redistribution and use in source and binary forms, with or without
3 * modification, are permitted provided that the following conditions are
4 * met :
5 *
6 * . Redistributions of source code must retain the above copyright
7 * notice, this list of conditions and the following disclaimer.
8 *
9 * . Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
12 *
13 * . The name of the author may not be used to endorse or promote products
14 * derived from this software without specific prior written permission.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
18 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
19 * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
20 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
21 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
22 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
24 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
25 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
26 * POSSIBILITY OF SUCH DAMAGE.
27 *
28 * $Id$
29 */
30
31 package palmed.edit.scrollbar;
32
33 import javax.microedition.lcdui.Graphics;
34
35 /***
36 * This interface defines a component able to draw a scrollbar.
37 *
38 * @author Mathieu Champlon
39 * @version $Revision$ $Date$
40 */
41 public interface IDrawer
42 {
43 /***
44 * Draw the body.
45 *
46 * @param g the graphics
47 * @param start the offset where to start at perpendiculary of the axis of the scrollbar
48 * @param end the offset where to end at perpendiculary of the axis of the scrollbar
49 * @param from the offset where to start at on the axis of the scrollbar
50 * @param to the offset where to end at on the axis of the scrollbar
51 */
52 void drawBody( final Graphics g, final int start, final int end, final int from, final int to );
53
54 /***
55 * Draw an arrow.
56 *
57 * @param g the graphics
58 * @param end the offset where to end at perpendiculary of the axis of the scrollbar
59 * @param from the offset where to start at on the axis of the scrollbar
60 * @param to the offset where to end at on the axis of the scrollbar
61 */
62 void drawArrow( final Graphics g, final int end, final int from, final int to );
63
64 /***
65 * Draw the cursor.
66 *
67 * @param g the graphics
68 * @param start the offset to start at perpendiculary of the axis of the scrollbar
69 * @param width the width of the cursor
70 * @param from the offset to start at on the axis of the scrollbar
71 * @param length the length of the cursor
72 */
73 void drawCursor( final Graphics g, final int start, final int width, final int from, final int length );
74
75 /***
76 * Draw the background.
77 *
78 * @param g the graphics
79 * @param size the size of the scrollbar
80 * @param width the width of the scrollbar
81 */
82 void drawBackground( Graphics g, int size, int width );
83 }