|
1
11 package org.eclipse.jdt.internal.ui.util;
12
13 import org.eclipse.core.runtime.Assert;
14
15 import org.eclipse.swt.layout.GridData;
16 import org.eclipse.swt.widgets.Control;
17
18
19
31 public class RowLayouter {
32
33 public int spanHorizontalAlignment= -1;
34 public int spanGrabExcessHorizontalSpace= -1;
35 public int spanHorizontalSpan= -1;
36 public int spanHorizontalIndent= -1;
37 public int spanWidthHint= -1;
38
39 public int spanVerticalAlignment= -1;
40 public int spanGrabExcessVerticalSpace= -1;
41 public int spanVerticalSpan= -1;
42 public int spanHeightHint= -1;
43
44 private int fNumColumns;
45 private boolean fOrder;
46 private Control fLastControl;
47 private GridData[] fDefaultGridDatas= new GridData[4];
48
49 public RowLayouter(int numColumns) {
50 this(numColumns, false);
51 }
52
53 public RowLayouter(int numColumns, boolean order) {
54 fNumColumns= numColumns;
55 fOrder= order;
56 }
57
58 public void setDefaultSpan() {
59 spanHorizontalAlignment= GridData.FILL;
60 spanGrabExcessHorizontalSpace= 1;
61 }
62
63 public void perform(Control c1) {
64 perform(new Control[] {c1}, 0);
65 }
66
67 public void perform(Control c1, Control c2, int span) {
68 perform(new Control[] {c1, c2}, span);
69 }
70
71 public void perform(Control c1, Control c2, Control c3, int span) {
72 perform(new Control[] {c1, c2, c3}, span);
73 }
74
75 public void perform(Control[] controls, int spanColumn) {
76 int numColumns= numColumns();
77 Assert.isTrue(controls.length <= numColumns);
78 order(controls);
79 int gridIndex= 0;
80 for (int i= 0; i < controls.length; i++) {
81 Control control= controls[i];
82 GridData gd= (GridData)control.getLayoutData();
83 if (gd == null)
84 gd= getGridData(gridIndex);
85
86 if (i == spanColumn) {
87 int span= numColumns - (controls.length - 1);
88 gridIndex+= span;
89 if (gd == null)
90 gd= new GridData();
91 applyDelta(gd);
92 gd.horizontalSpan= span;
93 } else {
94 gridIndex++;
95 }
96 control.setLayoutData(gd);
97 }
98 }
99
100 private void applyDelta(GridData gd) {
101 if (spanHorizontalAlignment != -1)
102 gd.horizontalAlignment= spanHorizontalAlignment;
103
104 if (spanGrabExcessHorizontalSpace != -1) {
105 if (spanGrabExcessHorizontalSpace == 0)
106 gd.grabExcessHorizontalSpace= false;
107 else
108 gd.grabExcessHorizontalSpace= true;
109 }
110
111
112 if (spanHorizontalSpan != -1)
113 gd.horizontalSpan= spanHorizontalSpan;
114
115 if (spanHorizontalIndent != -1)
116 gd.horizontalIndent= spanHorizontalIndent;
117
118 if (spanWidthHint != -1)
119 gd.widthHint= spanWidthHint;
120
121 if (spanVerticalAlignment != -1)
122 gd.verticalAlignment= spanVerticalAlignment;
123
124 if (spanGrabExcessVerticalSpace != -1) {
125 if (spanGrabExcessVerticalSpace == 0)
126 gd.grabExcessVerticalSpace= false;
127 else
128 gd.grabExcessVerticalSpace= true;
129 }
130
131 if (spanVerticalSpan != -1)
132 gd.verticalSpan= spanVerticalSpan;
133
134 if (spanHeightHint != -1)
135 gd.heightHint= spanHeightHint;
136 }
137 public void setDefaultGridData(GridData gd, int index) {
138 if (index >= fDefaultGridDatas.length) {
139 GridData[] newDatas= new GridData[index + 4];
140 System.arraycopy(fDefaultGridDatas, 0, newDatas, 0, fDefaultGridDatas.length);
141 fDefaultGridDatas= newDatas;
142 }
143 fDefaultGridDatas[index]= gd;
144 }
145
146 public GridData getGridData(int index) {
147 if (index > fDefaultGridDatas.length)
148 return null;
149
150 return cloneGridData(fDefaultGridDatas[index]);
151 }
152
153 public int numColumns() {
154 return fNumColumns;
155 }
156
157 protected void order(Control[] controls) {
158 if (!fOrder)
159 return;
160
161 for (int i= 0; i < controls.length; i++) {
162 Control control= controls[i];
163 control.moveBelow(fLastControl);
164 fLastControl= control;
165 }
166 }
167
168 protected GridData cloneGridData(GridData gd) {
169 if (gd == null)
170 return null;
171
172 GridData result= new GridData();
173 result.horizontalAlignment= gd.horizontalAlignment;
174 result.grabExcessHorizontalSpace= gd.grabExcessHorizontalSpace;
175 result.horizontalSpan= gd.horizontalSpan;
176 result.horizontalIndent= gd.horizontalIndent;
177 result.widthHint= gd.widthHint;
178
179 result.verticalAlignment= gd.verticalAlignment;
180 result.grabExcessVerticalSpace= gd.grabExcessVerticalSpace;
181 result.verticalSpan= gd.verticalSpan;
182 result.heightHint= gd.heightHint;
183 return result;
184 }
185 }
186 |
Popular Tags |
Java API By Example, From Geeks To Geeks.