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1
19
20 package swingwtx.swing;
21
22
23 public class SpinnerNumberModel extends AbstractSpinnerModel {
24
25 protected Comparable  minimum;
26 protected Comparable maximum;
27 protected Number stepSize;
28 protected Number value;
29
30 public SpinnerNumberModel() { this(new Integer (0), null, null, new Integer (1)); }
31 public SpinnerNumberModel(int value, int minimum, int maximum, int stepSize) { this(new Integer (value), new Integer (minimum), new Integer (maximum), new Integer (stepSize)); }
32 public SpinnerNumberModel(double value, double minimum, double maximum, double stepSize) { this(new Double (value), new Double (minimum), new Double (maximum), new Double (stepSize)); }
33 public SpinnerNumberModel(Number value, Comparable minimum, Comparable maximum, Number stepSize) {
34 this.value = value;
35 this.minimum = minimum;
36 this.maximum = maximum;
37 this.stepSize = stepSize;
38 }
39
40 public void setMinimum(Comparable minimum) {
41 this.minimum = minimum;
42 fireStateChanged();
43 }
44
45 public Comparable getMinimum() {
46 return minimum;
47 }
48
49 public void setMaximum(Comparable maximum) {
50 this.maximum = maximum;
51 fireStateChanged();
52 }
53
54 public Comparable getMaximum() {
55 return maximum;
56 }
57
58 public void setStepSize(Number stepSize) {
59 this.stepSize = stepSize;
60 fireStateChanged();
61 }
62
63 public Number getStepSize() {
64 return stepSize;
65 }
66
67 public Object getNextValue() {
68 return nextValue(+1);
69 }
70
71 public Object getPreviousValue() {
72 return nextValue(-1);
73 }
74
75 public Number getNumber() {
76 return value;
77 }
78
79 public Object getValue() {
80 return value;
81 }
82
83 public void setValue(Object value) {
84 this.value = (Number )value;
85 fireStateChanged();
86 }
87
88 protected Number nextValue(int direction) {
89 Number newValue;
90 if ((value instanceof Float ) || (value instanceof Double )) {
91
92 double v = value.doubleValue() + (stepSize.doubleValue() * (double) direction);
93 if (value instanceof Double ) {
94 newValue = new Double (v);
95 }
96 else {
97 newValue = new Float (v);
98 }
99 }
100 else {
101
102 long v = value.longValue() + (stepSize.longValue() * (long) direction);
103
104 if (value instanceof Long ) {
105 newValue = new Long (v);
106 }
107 else if (value instanceof Integer ) {
108 newValue = new Integer ((int)v);
109 }
110 else if (value instanceof Short ) {
111 newValue = new Short ((short)v);
112 }
113 else {
114 newValue = new Byte ((byte)v);
115 }
116 }
117
118 if ((maximum != null) && (maximum.compareTo(newValue) < 0)) {
119 return null;
120 }
121 if ((minimum != null) && (minimum.compareTo(newValue) > 0)) {
122 return null;
123 }
124 else {
125 return newValue;
126 }
127 }
128
129 }
130
131 |
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