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1
36
37 package swingwt.awt;
38
39
45 public class TableLayout implements LayoutManager, java.io.Serializable  {
46
47 protected int hgap = 4;
48 protected int vgap = 4;
49 protected int rows;
50 protected int cols;
51
55 protected boolean leftToRight = true;
56
57 public TableLayout() {
58 this(1, 0, 4, 4);
59 }
60
61 public TableLayout(int rows, int cols) {
62 this(rows, cols, 4, 4, true);
63 }
64
65 public TableLayout(int rows, int cols, boolean leftToRight) {
66 this(rows, cols, 4, 4, leftToRight);
67 }
68
69 public TableLayout(int rows, int cols, int hgap, int vgap) {
70 this(rows, cols, hgap, vgap, true);
71 }
72
73 public TableLayout(int rows, int cols, int hgap, int vgap, boolean leftToRight) {
74 if ((rows == 0) && (cols == 0)) {
75 throw new IllegalArgumentException ("rows and cols cannot both be zero");
76 }
77 this.rows = rows;
78 this.cols = cols;
79 this.hgap = hgap;
80 this.vgap = vgap;
81 this.leftToRight = leftToRight;
82 }
83
84 public int getRows() {
85 return rows;
86 }
87
88 public void setRows(int rows) {
89 if ((rows == 0) && (this.cols == 0)) {
90 throw new IllegalArgumentException ("rows and cols cannot both be zero");
91 }
92 this.rows = rows;
93 }
94
95 public int getColumns() {
96 return cols;
97 }
98
99 public void setColumns(int cols) {
100 if ((cols == 0) && (this.rows == 0)) {
101 throw new IllegalArgumentException ("rows and cols cannot both be zero");
102 }
103 this.cols = cols;
104 }
105
106 public int getHgap() {
107 return hgap;
108 }
109
110 public void setHgap(int hgap) {
111 this.hgap = hgap;
112 }
113
114 public int getVgap() {
115 return vgap;
116 }
117
118 public void setVgap(int vgap) {
119 this.vgap = vgap;
120 }
121
122 public void addLayoutComponent(String name, Component comp) {
123 }
124
125 public void removeLayoutComponent(Component comp) {
126 }
127
128 public Dimension preferredLayoutSize(Container parent) {
129 Insets insets = parent.getInsets();
130 int ncomponents = parent.getComponentCount();
131 int nrows = rows;
132 int ncols = cols;
133
134 if (nrows > 0) {
135 ncols = (ncomponents + nrows - 1) / nrows;
136 } else {
137 nrows = (ncomponents + ncols - 1) / ncols;
138 }
139 int w = 0;
140 int h = 0;
141 for (int i = 0; i < ncomponents; i++) {
142 Component comp = parent.getComponent(i);
143 Dimension d = comp.getPreferredSize();
144 if (w < d.width) {
145 w = d.width;
146 }
147 if (h < d.height) {
148 h = d.height;
149 }
150 }
151 return new Dimension(
152 insets.left + insets.right + ncols * w + (ncols - 1) * hgap,
153 insets.top + insets.bottom + nrows * h + (nrows - 1) * vgap);
154 }
155
156 public Dimension minimumLayoutSize(Container parent) {
157 Insets insets = parent.getInsets();
158 int ncomponents = parent.getComponentCount();
159 int nrows = rows;
160 int ncols = cols;
161
162 if (nrows > 0) {
163 ncols = (ncomponents + nrows - 1) / nrows;
164 } else {
165 nrows = (ncomponents + ncols - 1) / ncols;
166 }
167 int w = 0;
168 int h = 0;
169 for (int i = 0; i < ncomponents; i++) {
170 Component comp = parent.getComponent(i);
171 Dimension d = comp.getMinimumSize();
172 if (w < d.width) {
173 w = d.width;
174 }
175 if (h < d.height) {
176 h = d.height;
177 }
178 }
179 return new Dimension(
180 insets.left + insets.right + ncols * w + (ncols - 1) * hgap,
181 insets.top + insets.bottom + nrows * h + (nrows - 1) * vgap);
182 }
183
184 public void layoutContainer(Container parent) {
185
186 Insets insets = parent.getInsets();
187 int ncomponents = parent.getComponentCount();
188 int nrows = rows;
189 int ncols = cols;
190
191 if (ncomponents == 0) {
192 return;
193 }
194
195 if (leftToRight) {
196 int[] maxWidths = new int[(cols)];
199
200 int cc = 0; for (int i = 0; i < ncomponents; i++) {
202 int cw = parent.getComponent(i).getPreferredSize().width;
203 if (cw > maxWidths[cc])
204 maxWidths[cc] = cw;
205 cc++;
206 if (cc == cols) cc = 0;
207 }
208
209 int[] colPoints = new int[(cols)];
212 for (int i = 0; i < cols; i++) {
213 if (i != 0)
214 colPoints[i] = colPoints[i-1] + hgap + maxWidths[i-1];
215 else
216 colPoints[i] = hgap;
217 }
218
219 cc = 0;
220 int highestInRow = 0;
221 int curRowPos = 0;
222 for (int i = 0; i < parent.getComponentCount(); i++) {
223 parent.getComponent(i).setBounds(
224 colPoints[cc],
225 curRowPos,
226 parent.getComponent(i).getPreferredSize().width,
227 parent.getComponent(i).getPreferredSize().height
228 );
229 if (parent.getComponent(i).getPreferredSize().height > highestInRow)
230 highestInRow = parent.getComponent(i).getPreferredSize().height;
231 cc++;
232 if (cc == cols) {
233 cc = 0;
234 curRowPos += highestInRow + vgap;
237 highestInRow = 0;
238 }
239 }
240 }
241 else {
242
243
246 int totRows = parent.getHeight() / (parent.getComponent(0).getPreferredSize().height + vgap);
250
251 int[] maxWidths = new int[(cols * 20)];
254
255 int cr = 0; int cc = 0; for (int i = 0; i < ncomponents; i++) {
258 int ch = parent.getComponent(i).getPreferredSize().width;
259 if (ch > maxWidths[cc])
260 maxWidths[cc] = ch;
261 cr++;
262 if (cr == totRows) { cr = 0; cc++; }
263 }
264 if (cols < cc) cols = cc;
267
268 int[] colPoints = new int[(cols * 2)];
271 for (int i = 0; i < cols; i++) {
272 if (i != 0)
273 colPoints[i] = colPoints[i-1] + hgap + maxWidths[i-1];
274 else
275 colPoints[i] = hgap;
276 }
277
278 cc = 0;
279 int curRowPos = 0;
280 cr = 0;
281 for (int i = 0; i < parent.getComponentCount(); i++) {
282 parent.getComponent(i).setBounds(
283 colPoints[cc],
284 curRowPos,
285 parent.getComponent(i).getPreferredSize().width,
286 parent.getComponent(i).getPreferredSize().height
287 );
288 cr++;
289
290 curRowPos += parent.getComponent(i).getPreferredSize().height + vgap;
292
293 if (cr == totRows) {
294 cr = 0;
295 curRowPos = 0;
296 cc++;
297 }
298 }
299 }
300 }
301 }
302 |
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