1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
|
/*******************************************************************************
* Copyright (c) 2006 IBM Corporation.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* IBM Corporation - Jeff Briggs, Henry Hughes, Ryan Morse
*******************************************************************************/
package org.eclipse.linuxtools.systemtap.ui.structures.ui;
import org.eclipse.jface.preference.FieldEditor;
import org.eclipse.core.runtime.Assert;
import org.eclipse.swt.SWT;
import org.eclipse.swt.events.SelectionAdapter;
import org.eclipse.swt.events.SelectionEvent;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.widgets.Combo;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Control;
/**
* A field editor for a combo box that allows the drop-down selection of one of a list of items.
*/
public class ComboFieldEditor extends FieldEditor {
/**
* The <code>Combo</code> widget.
*/
private Combo fCombo;
/**
* The value (not the name) of the currently selected item in the Combo widget.
*/
private String fValue;
/**
* The names (labels) and underlying values to populate the combo widget. These should be
* arranged as: { {name1, value1}, {name2, value2}, ...}
*/
private String[][] fEntryNamesAndValues;
public ComboFieldEditor(String name, String labelText, String[][] entryNamesAndValues, Composite parent) {
init(name, labelText);
Assert.isTrue(checkArray(entryNamesAndValues));
fEntryNamesAndValues = entryNamesAndValues;
createControl(parent);
}
/**
* Checks whether given <code>String[][]</code> is of "type"
* <code>String[][2]</code>.
*
* @return <code>true</code> if it is ok, and <code>false</code> otherwise
*/
private boolean checkArray(String[][] table) {
if (table == null) {
return false;
}
for (int i = 0; i < table.length; i++) {
String[] array = table[i];
if (array == null || array.length != 2) {
return false;
}
}
return true;
}
/**
* @see FieldEditor#adjustForNumColumns(int)
*/
protected void adjustForNumColumns(int numColumns) {
if (numColumns > 1) {
Control control = getLabelControl();
int left = numColumns;
if (control != null) {
((GridData)control.getLayoutData()).horizontalSpan = 1;
left = left - 1;
}
((GridData)fCombo.getLayoutData()).horizontalSpan = left;
} else {
Control control = getLabelControl();
if (control != null) {
((GridData)control.getLayoutData()).horizontalSpan = 1;
}
((GridData)fCombo.getLayoutData()).horizontalSpan = 1;
}
}
/**
* @see FieldEditor#doFillIntoGrid(Composite, int)
*/
protected void doFillIntoGrid(Composite parent, int numColumns) {
int comboC = 1;
if (numColumns > 1) {
comboC = numColumns - 1;
}
Control control = getLabelControl(parent);
GridData gd = new GridData();
gd.horizontalSpan = 1;
control.setLayoutData(gd);
control = getComboBoxControl(parent);
gd = new GridData();
gd.horizontalSpan = comboC;
gd.horizontalAlignment = GridData.FILL;
control.setLayoutData(gd);
control.setFont(parent.getFont());
}
/**
* @see FieldEditor#doLoad()
*/
protected void doLoad() {
updateComboForValue(getPreferenceStore().getString(getPreferenceName()));
}
/**
* @see FieldEditor#doLoadDefault()
*/
protected void doLoadDefault() {
updateComboForValue(getPreferenceStore().getDefaultString(getPreferenceName()));
}
/**
* @see FieldEditor#doStore()
*/
protected void doStore() {
if (fValue == null) {
getPreferenceStore().setToDefault(getPreferenceName());
return;
}
getPreferenceStore().setValue(getPreferenceName(), fValue);
}
/**
* @see FieldEditor#getNumberOfControls()
*/
public int getNumberOfControls() {
return 1;
}
/**
* Lazily create and return the Combo control.
*/
public Combo getComboBoxControl(Composite parent) {
if (fCombo == null) {
fCombo = new Combo(parent, SWT.READ_ONLY);
fCombo.setFont(parent.getFont());
for (int i = 0; i < fEntryNamesAndValues.length; i++) {
fCombo.add(fEntryNamesAndValues[i][0], i);
}
fCombo.addSelectionListener(new SelectionAdapter() {
public void widgetSelected(SelectionEvent evt) {
String oldValue = fValue;
String name = fCombo.getText();
fValue = getValueForName(name);
setPresentsDefaultValue(false);
fireValueChanged(VALUE, oldValue, fValue);
}
});
}
return fCombo;
}
/**
* Given the name (label) of an entry, return the corresponding value.
*/
protected String getValueForName(String name) {
for (int i = 0; i < fEntryNamesAndValues.length; i++) {
String[] entry = fEntryNamesAndValues[i];
if (name.equals(entry[0])) {
return entry[1];
}
}
return fEntryNamesAndValues[0][0];
}
/**
* Set the name in the combo widget to match the specified value.
*/
protected void updateComboForValue(String value) {
fValue = value;
for (int i = 0; i < fEntryNamesAndValues.length; i++) {
if (value.equals(fEntryNamesAndValues[i][1])) {
fCombo.setText(fEntryNamesAndValues[i][0]);
return;
}
}
if (fEntryNamesAndValues.length > 0) {
fValue = fEntryNamesAndValues[0][1];
}
}
}
|
