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comparison org.eclipse.swt.win32.win32.x86/src/org/eclipse/swt/layout/FormData.d @ 0:6dd524f61e62

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add dwt win and basic java stuff
author Frank Benoit <benoit@tionex.de>
date Mon, 02 Mar 2009 14:44:16 +0100
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-1:000000000000 0:6dd524f61e62
1 /*******************************************************************************
2 * Copyright (c) 2000, 2008 IBM Corporation and others.
3 * All rights reserved. This program and the accompanying materials
4 * are made available under the terms of the Eclipse Public License v1.0
5 * which accompanies this distribution, and is available at
6 * http://www.eclipse.org/legal/epl-v10.html
7 *
8 * Contributors:
9 * IBM Corporation - initial API and implementation
10 * Port to the D programming language:
11 * Frank Benoit <benoit@tionex.de>
12 *******************************************************************************/
13 module org.eclipse.swt.layout.FormData;
14
15
16 import org.eclipse.swt.SWT;
17 import org.eclipse.swt.graphics.Point;
18 import org.eclipse.swt.widgets.Control;
19 import org.eclipse.swt.layout.FormAttachment;
20
21 import tango.util.Convert;
22 import java.lang.all;
23
24 /**
25 * Instances of this class are used to define the attachments
26 * of a control in a <code>FormLayout</code>.
27 * <p>
28 * To set a <code>FormData</code> object into a control, you use the
29 * <code>setLayoutData ()</code> method. To define attachments for the
30 * <code>FormData</code>, set the fields directly, like this:
31 * <pre>
32 * FormData data = new FormData();
33 * data.left = new FormAttachment(0,5);
34 * data.right = new FormAttachment(100,-5);
35 * button.setLayoutData(formData);
36 * </pre>
37 * </p>
38 * <p>
39 * <code>FormData</code> contains the <code>FormAttachments</code> for
40 * each edge of the control that the <code>FormLayout</code> uses to
41 * determine the size and position of the control. <code>FormData</code>
42 * objects also allow you to set the width and height of controls within
43 * a <code>FormLayout</code>.
44 * </p>
45 *
46 * @see FormLayout
47 * @see FormAttachment
48 * @see <a href="http://www.eclipse.org/swt/">Sample code and further information</a>
49 *
50 * @since 2.0
51 */
52 public final class FormData {
53 /**
54 * width specifies the preferred width in pixels. This value
55 * is the wHint passed into Control.computeSize(int, int, bool)
56 * to determine the preferred size of the control.
57 *
58 * The default value is SWT.DEFAULT.
59 *
60 * @see Control#computeSize(int, int, bool)
61 */
62 public int width = SWT.DEFAULT;
63 /**
64 * height specifies the preferred height in pixels. This value
65 * is the hHint passed into Control.computeSize(int, int, bool)
66 * to determine the preferred size of the control.
67 *
68 * The default value is SWT.DEFAULT.
69 *
70 * @see Control#computeSize(int, int, bool)
71 */
72 public int height = SWT.DEFAULT;
73 /**
74 * left specifies the attachment of the left side of
75 * the control.
76 */
77 public FormAttachment left;
78 /**
79 * right specifies the attachment of the right side of
80 * the control.
81 */
82 public FormAttachment right;
83 /**
84 * top specifies the attachment of the top of the control.
85 */
86 public FormAttachment top;
87 /**
88 * bottom specifies the attachment of the bottom of the
89 * control.
90 */
91 public FormAttachment bottom;
92
93 int cacheWidth = -1, cacheHeight = -1;
94 int defaultWhint, defaultHhint, defaultWidth = -1, defaultHeight = -1;
95 int currentWhint, currentHhint, currentWidth = -1, currentHeight = -1;
96 FormAttachment cacheLeft, cacheRight, cacheTop, cacheBottom;
97 bool isVisited, needed;
98
99 /**
100 * Constructs a new instance of FormData using
101 * default values.
102 */
103 public this () {
104 }
105
106 /**
107 * Constructs a new instance of FormData according to the parameters.
108 * A value of SWT.DEFAULT indicates that no minimum width or
109 * no minimum height is specified.
110 *
111 * @param width a minimum width for the control
112 * @param height a minimum height for the control
113 */
114 public this (int width, int height) {
115 this.width = width;
116 this.height = height;
117 }
118
119 void computeSize (Control control, int wHint, int hHint, bool flushCache_) {
120 if (cacheWidth !is -1 && cacheHeight !is -1) return;
121 if (wHint is this.width && hHint is this.height) {
122 if (defaultWidth is -1 || defaultHeight is -1 || wHint !is defaultWhint || hHint !is defaultHhint) {
123 Point size = control.computeSize (wHint, hHint, flushCache_);
124 defaultWhint = wHint;
125 defaultHhint = hHint;
126 defaultWidth = size.x;
127 defaultHeight = size.y;
128 }
129 cacheWidth = defaultWidth;
130 cacheHeight = defaultHeight;
131 return;
132 }
133 if (currentWidth is -1 || currentHeight is -1 || wHint !is currentWhint || hHint !is currentHhint) {
134 Point size = control.computeSize (wHint, hHint, flushCache_);
135 currentWhint = wHint;
136 currentHhint = hHint;
137 currentWidth = size.x;
138 currentHeight = size.y;
139 }
140 cacheWidth = currentWidth;
141 cacheHeight = currentHeight;
142 }
143
144 void flushCache () {
145 cacheWidth = cacheHeight = -1;
146 defaultHeight = defaultWidth = -1;
147 currentHeight = currentWidth = -1;
148 }
149
150 int getWidth (Control control, bool flushCache) {
151 needed = true;
152 computeSize (control, width, height, flushCache);
153 return cacheWidth;
154 }
155
156 int getHeight (Control control, bool flushCache) {
157 computeSize (control, width, height, flushCache);
158 return cacheHeight;
159 }
160
161 FormAttachment getBottomAttachment (Control control, int spacing, bool flushCache) {
162 if (cacheBottom !is null) return cacheBottom;
163 if (isVisited) return cacheBottom = new FormAttachment (0, getHeight (control, flushCache));
164 if (bottom is null) {
165 if (top is null) return cacheBottom = new FormAttachment (0, getHeight (control, flushCache));
166 return cacheBottom = getTopAttachment (control, spacing, flushCache).plus (getHeight (control, flushCache));
167 }
168 Control bottomControl = bottom.control;
169 if (bottomControl !is null) {
170 if (bottomControl.isDisposed ()) {
171 bottom.control = bottomControl = null;
172 } else {
173 if (bottomControl.getParent () !is control.getParent ()) {
174 bottomControl = null;
175 }
176 }
177 }
178 if (bottomControl is null) return cacheBottom = bottom;
179 isVisited = true;
180 FormData bottomData = cast(FormData) bottomControl.getLayoutData ();
181 FormAttachment bottomAttachment = bottomData.getBottomAttachment (bottomControl, spacing, flushCache);
182 switch (bottom.alignment) {
183 case SWT.BOTTOM:
184 cacheBottom = bottomAttachment.plus (bottom.offset);
185 break;
186 case SWT.CENTER: {
187 FormAttachment topAttachment = bottomData.getTopAttachment (bottomControl, spacing, flushCache);
188 FormAttachment bottomHeight = bottomAttachment.minus (topAttachment);
189 cacheBottom = bottomAttachment.minus (bottomHeight.minus (getHeight (control, flushCache)).divide (2));
190 break;
191 }
192 default: {
193 FormAttachment topAttachment = bottomData.getTopAttachment (bottomControl, spacing, flushCache);
194 cacheBottom = topAttachment.plus (bottom.offset - spacing);
195 break;
196 }
197 }
198 isVisited = false;
199 return cacheBottom;
200 }
201
202 FormAttachment getLeftAttachment (Control control, int spacing, bool flushCache) {
203 if (cacheLeft !is null) return cacheLeft;
204 if (isVisited) return cacheLeft = new FormAttachment (0, 0);
205 if (left is null) {
206 if (right is null) return cacheLeft = new FormAttachment (0, 0);
207 return cacheLeft = getRightAttachment (control, spacing, flushCache).minus (getWidth (control, flushCache));
208 }
209 Control leftControl = left.control;
210 if (leftControl !is null) {
211 if (leftControl.isDisposed ()) {
212 left.control = leftControl = null;
213 } else {
214 if (leftControl.getParent () !is control.getParent ()) {
215 leftControl = null;
216 }
217 }
218 }
219 if (leftControl is null) return cacheLeft = left;
220 isVisited = true;
221 FormData leftData = cast(FormData) leftControl.getLayoutData ();
222 FormAttachment leftAttachment = leftData.getLeftAttachment (leftControl, spacing, flushCache);
223 switch (left.alignment) {
224 case SWT.LEFT:
225 cacheLeft = leftAttachment.plus (left.offset);
226 break;
227 case SWT.CENTER: {
228 FormAttachment rightAttachment = leftData.getRightAttachment (leftControl, spacing, flushCache);
229 FormAttachment leftWidth = rightAttachment.minus (leftAttachment);
230 cacheLeft = leftAttachment.plus (leftWidth.minus (getWidth (control, flushCache)).divide (2));
231 break;
232 }
233 default: {
234 FormAttachment rightAttachment = leftData.getRightAttachment (leftControl, spacing, flushCache);
235 cacheLeft = rightAttachment.plus (left.offset + spacing);
236 }
237 }
238 isVisited = false;
239 return cacheLeft;
240 }
241
242 String getName () {
243 String string = this.classinfo.name;
244 int index = string.lastIndexOf( '.');
245 if (index is -1 ) return string;
246 return string[ index + 1 .. string.length ];
247 }
248
249 FormAttachment getRightAttachment (Control control, int spacing, bool flushCache) {
250 if (cacheRight !is null) return cacheRight;
251 if (isVisited) return cacheRight = new FormAttachment (0, getWidth (control, flushCache));
252 if (right is null) {
253 if (left is null) return cacheRight = new FormAttachment (0, getWidth (control, flushCache));
254 return cacheRight = getLeftAttachment (control, spacing, flushCache).plus (getWidth (control, flushCache));
255 }
256 Control rightControl = right.control;
257 if (rightControl !is null) {
258 if (rightControl.isDisposed ()) {
259 right.control = rightControl = null;
260 } else {
261 if (rightControl.getParent () !is control.getParent ()) {
262 rightControl = null;
263 }
264 }
265 }
266 if (rightControl is null) return cacheRight = right;
267 isVisited = true;
268 FormData rightData = cast(FormData) rightControl.getLayoutData ();
269 FormAttachment rightAttachment = rightData.getRightAttachment (rightControl, spacing, flushCache);
270 switch (right.alignment) {
271 case SWT.RIGHT:
272 cacheRight = rightAttachment.plus (right.offset);
273 break;
274 case SWT.CENTER: {
275 FormAttachment leftAttachment = rightData.getLeftAttachment (rightControl, spacing, flushCache);
276 FormAttachment rightWidth = rightAttachment.minus (leftAttachment);
277 cacheRight = rightAttachment.minus (rightWidth.minus (getWidth (control, flushCache)).divide (2));
278 break;
279 }
280 default: {
281 FormAttachment leftAttachment = rightData.getLeftAttachment (rightControl, spacing, flushCache);
282 cacheRight = leftAttachment.plus (right.offset - spacing);
283 break;
284 }
285 }
286 isVisited = false;
287 return cacheRight;
288 }
289
290 FormAttachment getTopAttachment (Control control, int spacing, bool flushCache) {
291 if (cacheTop !is null) return cacheTop;
292 if (isVisited) return cacheTop = new FormAttachment (0, 0);
293 if (top is null) {
294 if (bottom is null) return cacheTop = new FormAttachment (0, 0);
295 return cacheTop = getBottomAttachment (control, spacing, flushCache).minus (getHeight (control, flushCache));
296 }
297 Control topControl = top.control;
298 if (topControl !is null) {
299 if (topControl.isDisposed ()) {
300 top.control = topControl = null;
301 } else {
302 if (topControl.getParent () !is control.getParent ()) {
303 topControl = null;
304 }
305 }
306 }
307 if (topControl is null) return cacheTop = top;
308 isVisited = true;
309 FormData topData = cast(FormData) topControl.getLayoutData ();
310 FormAttachment topAttachment = topData.getTopAttachment (topControl, spacing, flushCache);
311 switch (top.alignment) {
312 case SWT.TOP:
313 cacheTop = topAttachment.plus (top.offset);
314 break;
315 case SWT.CENTER: {
316 FormAttachment bottomAttachment = topData.getBottomAttachment (topControl, spacing, flushCache);
317 FormAttachment topHeight = bottomAttachment.minus (topAttachment);
318 cacheTop = topAttachment.plus (topHeight.minus (getHeight (control, flushCache)).divide (2));
319 break;
320 }
321 default: {
322 FormAttachment bottomAttachment = topData.getBottomAttachment (topControl, spacing, flushCache);
323 cacheTop = bottomAttachment.plus (top.offset + spacing);
324 break;
325 }
326 }
327 isVisited = false;
328 return cacheTop;
329 }
330
331 /**
332 * Returns a string containing a concise, human-readable
333 * description of the receiver.
334 *
335 * @return a string representation of the FormData object
336 */
337 override public String toString () {
338 String string = getName()~" {";
339 if (width !is SWT.DEFAULT) string ~= "width="~to!(String)(width)~" ";
340 if (height !is SWT.DEFAULT) string ~= "height="~to!(String)(height)~" ";
341 if (left !is null) string ~= "left="~to!(String)(left)~" ";
342 if (right !is null) string ~= "right="~to!(String)(right)~" ";
343 if (top !is null) string ~= "top="~to!(String)(top)~" ";
344 if (bottom !is null) string ~= "bottom="~to!(String)(bottom)~" ";
345 string = string.trim();
346 string ~= "}";
347 return string;
348 }
349
350 }