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Java > Open Source Codes > javax > microedition > lcdui > ImageItem


1
2 /*
3  * MicroEmulator
4  * Copyright (C) 2001 Bartek Teodorczyk <barteo@it.pl>
5  *
6  * This library is free software; you can redistribute it and/or
7  * modify it under the terms of the GNU Lesser General Public
8  * License as published by the Free Software Foundation; either
9  * version 2.1 of the License, or (at your option) any later version.
10  *
11  * This library is distributed in the hope that it will be useful,
12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14  * Lesser General Public License for more details.
15  *
16  * You should have received a copy of the GNU Lesser General Public
17  * License along with this library; if not, write to the Free Software
18  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
19  */
20  
21 package javax.microedition.lcdui;
22
23 import com.barteo.emulator.device.DeviceFactory;
24
25
26 public class ImageItem extends Item
27 {
28
29     public static final int LAYOUT_DEFAULT = 0;
30     public static final int LAYOUT_LEFT = 1;
31     public static final int LAYOUT_RIGHT = 2;
32     public static final int LAYOUT_CENTER = 3;
33     public static final int LAYOUT_NEWLINE_BEFORE = 0x100;
34     public static final int LAYOUT_NEWLINE_AFTER = 0x200;
35
36     Image img;
37     int layout;
38   String altText;
39
40
41     public ImageItem(String label, Image img, int layout, String altText)
42     {
43         super(label);
44         
45         if (img != null && img.isMutable()) {
46             new IllegalArgumentException();
47         }
48         
49         this.img = img;
50         this.layout = layout;
51     this.altText = altText;
52     }
53
54
55   public String getAltText()
56   {
57     return altText;
58   }
59
60
61   public Image getImage()
62   {
63     return img;
64   }
65
66
67   public int getLayout()
68   {
69     return layout;
70   }
71
72
73   public void setAltText(String text)
74   {
75     altText = text;
76   }
77
78
79   public void setImage(Image img)
80   {
81     this.img = img;
82   }
83
84
85   public void setLabel(String label)
86   {
87     super.setLabel(label);
88   }
89
90
91   public void setLayout(int layout)
92   {
93         this.layout = layout;
94   }
95
96
97     int getHeight()
98     {
99         if (img == null) {
100             return super.getHeight();
101         } else {
102             return super.getHeight() + img.getHeight();
103         }
104     }
105
106
107   int paint(Graphics g)
108   {
109         super.paintContent(g);
110
111         if (img != null) {
112             g.translate(0, super.getHeight());
113             if (layout == LAYOUT_DEFAULT || layout == LAYOUT_LEFT) {
114                 g.drawImage(img, 0, 0, Graphics.LEFT | Graphics.TOP);
115             } else if (layout == LAYOUT_RIGHT) {
116                 g.drawImage(img, DeviceFactory.getDevice().getDeviceDisplay().getWidth(), 0,
117               Graphics.RIGHT | Graphics.TOP);
118             } else if (layout == LAYOUT_CENTER) {
119                 g.drawImage(img, DeviceFactory.getDevice().getDeviceDisplay().getWidth() / 2, 0,
120               Graphics.HCENTER | Graphics.TOP);
121             } else {
122                 g.drawImage(img, 0, 0, Graphics.LEFT | Graphics.TOP);
123             }
124             g.translate(0, -super.getHeight());
125         }
126
127         return getHeight();
128     }
129
130
131     int traverse(int gameKeyCode, int top, int bottom, boolean action)
132     {
133         Font f = Font.getDefaultFont();
134
135         if (gameKeyCode == Canvas.UP) {
136             if (top > 0) {
137                 if ((top % f.getHeight()) == 0) {
138                     return -f.getHeight();
139                 } else {
140                     return -(top % f.getHeight());
141                 }
142             } else {
143                 return Item.OUTOFITEM;
144             }
145         }
146         if (gameKeyCode == Canvas.DOWN) {
147             if (bottom < getHeight()) {
148                 if (getHeight() - bottom < f.getHeight()) {
149                     return getHeight() - bottom;
150                 } else {
151                     return f.getHeight();
152                 }
153             } else {
154                 return Item.OUTOFITEM;
155             }
156         }
157
158         return 0;
159     }
160
161 }
162
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