Source Code Cross Referenced for MTextFieldPeer.java in  » 6.0-JDK-Platform » solaris » sun » awt » motif » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » 6.0 JDK Platform » solaris » sun.awt.motif 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /*
002:         * Copyright 1995-2003 Sun Microsystems, Inc.  All Rights Reserved.
003:         * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
004:         *
005:         * This code is free software; you can redistribute it and/or modify it
006:         * under the terms of the GNU General Public License version 2 only, as
007:         * published by the Free Software Foundation.  Sun designates this
008:         * particular file as subject to the "Classpath" exception as provided
009:         * by Sun in the LICENSE file that accompanied this code.
010:         *
011:         * This code is distributed in the hope that it will be useful, but WITHOUT
012:         * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
013:         * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
014:         * version 2 for more details (a copy is included in the LICENSE file that
015:         * accompanied this code).
016:         *
017:         * You should have received a copy of the GNU General Public License version
018:         * 2 along with this work; if not, write to the Free Software Foundation,
019:         * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
020:         *
021:         * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
022:         * CA 95054 USA or visit www.sun.com if you need additional information or
023:         * have any questions.
024:         */
025:
026:        package sun.awt.motif;
027:
028:        import java.awt.*;
029:        import java.awt.peer.*;
030:        import java.awt.datatransfer.*;
031:        import java.awt.event.ActionEvent;
032:        import java.awt.event.TextEvent;
033:        import java.awt.im.InputMethodRequests;
034:
035:        public class MTextFieldPeer extends MComponentPeer implements 
036:                TextFieldPeer {
037:            native void pCreate(MComponentPeer parent);
038:
039:            private boolean firstChangeSkipped;
040:
041:            /**
042:             * Initialize JNI field and method IDs
043:             */
044:            private static native void initIDs();
045:
046:            static {
047:                initIDs();
048:            }
049:
050:            void create(MComponentPeer parent) {
051:                firstChangeSkipped = false;
052:                pCreate(parent);
053:            }
054:
055:            void initialize() {
056:                int start, end;
057:
058:                TextField txt = (TextField) target;
059:
060:                setText(txt.getText());
061:                if (txt.echoCharIsSet()) {
062:                    setEchoChar(txt.getEchoChar());
063:                }
064:
065:                start = txt.getSelectionStart();
066:                end = txt.getSelectionEnd();
067:
068:                if (end > start) {
069:                    select(start, end);
070:                } else {
071:                    setCaretPosition(start);
072:                }
073:
074:                if (!target.isBackgroundSet()) {
075:                    // This is a way to set the background color of the TextArea 
076:                    // without calling setBackground - go through native C code
077:                    setTargetBackground(SystemColor.text);
078:                }
079:                if (!target.isForegroundSet()) {
080:                    target.setForeground(SystemColor.textText);
081:                }
082:
083:                setEditable(txt.isEditable());
084:
085:                //	oldSelectionStart = -1; // accessibility support
086:                //	oldSelectionEnd = -1;	// accessibility support
087:
088:                super .initialize();
089:            }
090:
091:            public MTextFieldPeer(TextField target) {
092:                super (target);
093:            }
094:
095:            public void setEditable(boolean editable) {
096:                pSetEditable(editable);
097:
098:                /* 4136955 - Calling setBackground() here works around an Xt
099:                 * bug by forcing Xt to flush an internal widget cache
100:                 */
101:                setBackground(target.getBackground());
102:            }
103:
104:            public native void pSetEditable(boolean editable);
105:
106:            public native void select(int selStart, int selEnd);
107:
108:            public native int getSelectionStart();
109:
110:            public native int getSelectionEnd();
111:
112:            public native void setText(String l);
113:
114:            public native void insertReplaceText(String l);
115:
116:            public native void preDispose();
117:
118:            public native String getText();
119:
120:            public native void setEchoChar(char c);
121:
122:            public native void setFont(Font f);
123:
124:            public native void setCaretPosition(int pos);
125:
126:            public native int getCaretPosition();
127:
128:            // CDE/Motif defaults: margin=5, shadow=2, highlight=1 -- times 2.
129:            // Should have asked the widgets for correct values (see MTextAreaPeer).
130:            private static final int padding = 16;
131:
132:            public Dimension getMinimumSize() {
133:                FontMetrics fm = getFontMetrics(target.getFont());
134:                return new Dimension(fm.stringWidth(((TextField) target)
135:                        .getText()) + 20, fm.getMaxDescent()
136:                        + fm.getMaxAscent() + padding);
137:            }
138:
139:            public Dimension getPreferredSize(int cols) {
140:                return getMinimumSize(cols);
141:            }
142:
143:            public Dimension getMinimumSize(int cols) {
144:                FontMetrics fm = getFontMetrics(target.getFont());
145:                return new Dimension(fm.charWidth('0') * cols + 20, fm
146:                        .getMaxDescent()
147:                        + fm.getMaxAscent() + padding);
148:            }
149:
150:            public boolean isFocusable() {
151:                return true;
152:            }
153:
154:            // NOTE: This method is called by privileged threads.
155:            //       DO NOT INVOKE CLIENT CODE ON THIS THREAD!
156:            public void action(final long when, final int modifiers) {
157:                MToolkit.executeOnEventHandlerThread(target, new Runnable() {
158:                    public void run() {
159:                        postEvent(new ActionEvent(target,
160:                                ActionEvent.ACTION_PERFORMED,
161:                                ((TextField) target).getText(), when, modifiers));
162:                    }
163:                });
164:            }
165:
166:            protected void disposeImpl() {
167:                preDispose();
168:                super .disposeImpl();
169:            }
170:
171:            /*
172:             * Post a new TextEvent when the value of a text component changes.
173:             */
174:            public void valueChanged() {
175:                postEvent(new TextEvent(target, TextEvent.TEXT_VALUE_CHANGED));
176:            }
177:
178:            // Called from native widget when paste key is pressed and we
179:            // already own the selection (prevents Motif from hanging while
180:            // waiting for the selection)
181:            //
182:            // NOTE: This method is called by privileged threads.
183:            //       DO NOT INVOKE CLIENT CODE ON THIS THREAD!
184:            public void pasteFromClipboard() {
185:                Clipboard clipboard = target.getToolkit().getSystemClipboard();
186:
187:                Transferable content = clipboard.getContents(this );
188:                if (content != null) {
189:                    try {
190:                        String data = (String) (content
191:                                .getTransferData(DataFlavor.stringFlavor));
192:                        insertReplaceText(data);
193:
194:                    } catch (Exception e) {
195:                    }
196:                }
197:            }
198:
199:            /*
200:             * Print the native component by rendering the Motif look ourselves.
201:             * ToDo(aim): needs to query native motif for more accurate size and
202:             * color information, left text offset, and selected text.
203:             */
204:            public final static int BORDER = 2;
205:            public final static int MARGIN = 4;
206:
207:            public void print(Graphics g) {
208:                TextField txt = (TextField) target;
209:                Dimension d = txt.size();
210:                int w = d.width - (2 * BORDER);
211:                int h = d.height - (2 * BORDER);
212:                Color bg = txt.getBackground();
213:                Color fg = txt.getForeground();
214:                Color highlight = bg.brighter();
215:                String text = txt.getText();
216:                int moved = 0;
217:                int selStart = 0;
218:                int selEnd = 0;
219:
220:                g.setFont(txt.getFont());
221:                g.setColor(txt.isEditable() ? highlight : bg);
222:                g.fillRect(BORDER, BORDER, w, h);
223:
224:                g.setColor(bg);
225:                //g.drawRect(0, 0, d.width-1, d.height-1);
226:                draw3DRect(g, bg, 1, 1, d.width - 3, d.height - 3, false);
227:
228:                if (text != null) {
229:                    g.clipRect(BORDER, MARGIN, w, d.height - (2 * MARGIN));
230:                    FontMetrics fm = g.getFontMetrics();
231:
232:                    w = d.width - BORDER;
233:                    h = d.height - (2 * MARGIN);
234:                    int xs = pos2x(selStart) - moved;
235:                    int xe = pos2x(selEnd) - moved;
236:
237:                    if ((xs < MARGIN) && (xe > w)) {
238:                        g.setColor(highlight);
239:                        g.fillRect(BORDER, MARGIN, w - BORDER, h);
240:                    } else {
241:                        g.setColor(bg);
242:                        //g.fillRect(BORDER, MARGIN, w - BORDER, h);
243:
244:                        if ((xs >= MARGIN) && (xs <= w)) {
245:                            g.setColor(highlight); // selected text
246:
247:                            if (xe > w) {
248:                                g.fillRect(xs, MARGIN, w - xs, h);
249:                            } else if (xs == xe) {
250:                                //g.fillRect(xs, MARGIN, 1, h);
251:                            } else {
252:                                g.fillRect(xs, MARGIN, xe - xs, h);
253:                            }
254:                        } else if ((xe >= MARGIN) && (xe <= w)) {
255:                            g.setColor(highlight);
256:                            g.fillRect(BORDER, MARGIN, xe - BORDER, h);
257:                        }
258:                    }
259:                    g.setColor(fg);
260:                    int x = MARGIN - moved;
261:                    char echoChar = txt.getEchoChar();
262:                    if (echoChar == 0) {
263:                        g.drawString(text, x, BORDER + MARGIN
264:                                + fm.getMaxAscent());
265:                    } else {
266:                        char data[] = new char[text.length()];
267:                        for (int i = 0; i < data.length; i++) {
268:                            data[i] = echoChar;
269:                        }
270:                        g.drawChars(data, 0, data.length, x, BORDER + MARGIN
271:                                + fm.getMaxAscent());
272:
273:                    }
274:                }
275:
276:                target.print(g);
277:            }
278:
279:            int pos2x(int pos) {
280:                TextField txt = (TextField) target;
281:                FontMetrics fm = getFontMetrics(txt.getFont());
282:                int x = MARGIN, widths[] = fm.getWidths();
283:                String text = txt.getText();
284:                char echoChar = txt.getEchoChar();
285:                if (echoChar == 0) {
286:                    for (int i = 0; i < pos; i++) {
287:                        x += widths[text.charAt(i)];
288:                    }
289:                } else {
290:                    x += widths[echoChar] * pos;
291:                }
292:                return x;
293:            }
294:
295:            /**
296:             * DEPRECATED
297:             */
298:            public void setEchoCharacter(char c) {
299:                setEchoChar(c);
300:            }
301:
302:            /**
303:             * DEPRECATED
304:             */
305:            public Dimension minimumSize() {
306:                return getMinimumSize();
307:            }
308:
309:            /**
310:             * DEPRECATED
311:             */
312:            public Dimension minimumSize(int cols) {
313:                return getMinimumSize(cols);
314:            }
315:
316:            /**
317:             * DEPRECATED
318:             */
319:            public Dimension preferredSize(int cols) {
320:                return getPreferredSize(cols);
321:            }
322:
323:            void pShow() {
324:                super .pShow();
325:                notifyTextComponentChange(true);
326:            }
327:
328:            void pHide() {
329:                notifyTextComponentChange(false);
330:                super .pHide();
331:            }
332:
333:            void pDispose() {
334:                notifyTextComponentChange(false);
335:                super .pDispose();
336:            }
337:
338:            public InputMethodRequests getInputMethodRequests() {
339:                return null;
340:            }
341:
342:            //
343:            // Accessibility support
344:            //
345:
346:            // stub functions: to be fully implemented in a future release
347:            public int getIndexAtPoint(int x, int y) {
348:                return -1;
349:            }
350:
351:            public Rectangle getCharacterBounds(int i) {
352:                return null;
353:            }
354:
355:            public long filterEvents(long mask) {
356:                return 0;
357:            }
358:
359:            /*  To be fully implemented in a future release
360:
361:             int oldSelectionStart;
362:             int oldSelectionEnd;
363:
364:             public native int getIndexAtPoint(int x, int y);
365:             public native Rectangle getCharacterBounds(int i);
366:             public native long filterEvents(long mask);
367:
368:             /**
369:             * Handle a change in the text selection endpoints
370:             * (Note: could be simply a change in the caret location)
371:             *
372:             public void selectionValuesChanged(int start, int end) {
373:             return;  // Need to write implemetation of this.  
374:             }
375:             */
376:
377:        }
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