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1
11 package org.eclipse.search.internal.ui.util;
12
13 import org.eclipse.swt.layout.GridData;
14 import org.eclipse.swt.widgets.Control;
15
16 import org.eclipse.jface.util.Assert;
17
18 public class RowLayouter {
19
20 public int spanHorizontalAlignment= -1;
21 public int spanGrabExcessHorizontalSpace= -1;
22 public int spanHorizontalSpan= -1;
23 public int spanHorizontalIndent= -1;
24 public int spanWidthHint= -1;
25
26 public int spanVerticalAlignment= -1;
27 public int spanGrabExcessVerticalSpace= -1;
28 public int spanVerticalSpan= -1;
29 public int spanHeightHint= -1;
30
31 private int fNumColumns;
32 private boolean fOrder;
33 private Control fLastControl;
34 private GridData[] fDefaultGridDatas= new GridData[4];
35
36 public RowLayouter(int numColumns) {
37 this(numColumns, false);
38 }
39
40 public RowLayouter(int numColumns, boolean order) {
41 fNumColumns= numColumns;
42 fOrder= order;
43 }
44
45 public void setDefaultSpan() {
46 spanHorizontalAlignment= GridData.FILL;
47 spanGrabExcessHorizontalSpace= 1;
48 }
49
50 public void perform(Control c1) {
51 perform(new Control[] {c1}, 0);
52 }
53
54 public void perform(Control c1, Control c2, int span) {
55 perform(new Control[] {c1, c2}, span);
56 }
57
58 public void perform(Control c1, Control c2, Control c3, int span) {
59 perform(new Control[] {c1, c2, c3}, span);
60 }
61
62 public void perform(Control[] controls, int spanColumn) {
63 int numColumns= numColumns();
64 Assert.isTrue(controls.length <= numColumns);
65 order(controls);
66 int gridIndex= 0;
67 for (int i= 0; i < controls.length; i++) {
68 Control control= controls[i];
69 GridData gd= (GridData)control.getLayoutData();
70 if (gd == null)
71 gd= getGridData(gridIndex);
72
73 if (i == spanColumn) {
74 int span= numColumns - (controls.length - 1);
75 gridIndex+= span;
76 if (gd == null)
77 gd= new GridData();
78 applyDelta(gd);
79 gd.horizontalSpan= span;
80 } else {
81 gridIndex++;
82 }
83 control.setLayoutData(gd);
84 }
85 }
86
87 private void applyDelta(GridData gd) {
88 if (spanHorizontalAlignment != -1)
89 gd.horizontalAlignment= spanHorizontalAlignment;
90
91 if (spanGrabExcessHorizontalSpace != -1) {
92 if (spanGrabExcessHorizontalSpace == 0)
93 gd.grabExcessHorizontalSpace= false;
94 else
95 gd.grabExcessHorizontalSpace= true;
96 }
97
98
99 if (spanHorizontalSpan != -1)
100 gd.horizontalSpan= spanHorizontalSpan;
101
102 if (spanHorizontalIndent != -1)
103 gd.horizontalIndent= spanHorizontalIndent;
104
105 if (spanWidthHint != -1)
106 gd.widthHint= spanWidthHint;
107
108 if (spanVerticalAlignment != -1)
109 gd.verticalAlignment= spanVerticalAlignment;
110
111 if (spanGrabExcessVerticalSpace != -1) {
112 if (spanGrabExcessVerticalSpace == 0)
113 gd.grabExcessVerticalSpace= false;
114 else
115 gd.grabExcessVerticalSpace= true;
116 }
117
118 if (spanVerticalSpan != -1)
119 gd.verticalSpan= spanVerticalSpan;
120
121 if (spanHeightHint != -1)
122 gd.heightHint= spanHeightHint;
123 }
124 public void setDefaultGridData(GridData gd, int index) {
125 if (index >= fDefaultGridDatas.length) {
126 GridData[] newDatas= new GridData[index + 4];
127 System.arraycopy(fDefaultGridDatas, 0, newDatas, 0, fDefaultGridDatas.length);
128 fDefaultGridDatas= newDatas;
129 }
130 fDefaultGridDatas[index]= gd;
131 }
132
133 public GridData getGridData(int index) {
134 if (index > fDefaultGridDatas.length)
135 return null;
136
137 return cloneGridData(fDefaultGridDatas[index]);
138 }
139
140 public int numColumns() {
141 return fNumColumns;
142 }
143
144 protected void order(Control[] controls) {
145 if (!fOrder)
146 return;
147
148 for (int i= 0; i < controls.length; i++) {
149 Control control= controls[i];
150 control.moveBelow(fLastControl);
151 fLastControl= control;
152 }
153 }
154
155 protected GridData cloneGridData(GridData gd) {
156 if (gd == null)
157 return null;
158
159 GridData result= new GridData();
160 result.horizontalAlignment= gd.horizontalAlignment;
161 result.grabExcessHorizontalSpace= gd.grabExcessHorizontalSpace;
162 result.horizontalSpan= gd.horizontalSpan;
163 result.horizontalIndent= gd.horizontalIndent;
164 result.widthHint= gd.widthHint;
165
166 result.verticalAlignment= gd.verticalAlignment;
167 result.grabExcessVerticalSpace= gd.grabExcessVerticalSpace;
168 result.verticalSpan= gd.verticalSpan;
169 result.heightHint= gd.heightHint;
170 return result;
171 }
172 }
173 |
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