Source Code Cross Referenced for SwtWindow.java in  » Scripting » Kawa » gnu » jemacs » swt » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Scripting » Kawa » gnu.jemacs.swt 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        //This is free software;  for terms and warranty disclaimer see ./COPYING.
002:
003:        package gnu.jemacs.swt;
004:
005:        import gnu.jemacs.buffer.Buffer;
006:        import gnu.jemacs.buffer.EKeymap;
007:        import gnu.jemacs.buffer.EWindow;
008:
009:        import org.eclipse.swt.SWT;
010:        import org.eclipse.swt.custom.SashForm;
011:        import org.eclipse.swt.custom.VerifyKeyListener;
012:        import org.eclipse.swt.events.FocusEvent;
013:        import org.eclipse.swt.events.FocusListener;
014:        import org.eclipse.swt.events.KeyEvent;
015:        import org.eclipse.swt.events.KeyListener;
016:        import org.eclipse.swt.events.MouseEvent;
017:        import org.eclipse.swt.events.MouseListener;
018:        import org.eclipse.swt.events.VerifyEvent;
019:        import org.eclipse.swt.widgets.Composite;
020:
021:        /**
022:         * @author Christian Surlykke
023:         *         11-07-2004
024:         */
025:        public class SwtWindow extends EWindow implements  VerifyKeyListener,
026:                FocusListener, KeyListener, MouseListener {
027:            private SwtWindowWidget swtWindowWidget;
028:            private SwtBuffer swtBuffer;
029:
030:            public SwtWindow(Buffer buffer) {
031:                this (buffer, true);
032:            }
033:
034:            public SwtWindow(Buffer buffer, boolean wantModeLine) {
035:                super (buffer);
036:                this .swtBuffer = (SwtBuffer) buffer;
037:                updateModeline();
038:            }
039:
040:            /**
041:             * 
042:             */
043:            public void getReadyToShow(final Composite parent,
044:                    final int firstVisibleLine) {
045:                SwtHelper.getDisplay().syncExec(new Runnable() {
046:                    public void run() {
047:                        swtWindowWidget = new SwtWindowWidget(parent, swtBuffer
048:                                .getBufferContent(), firstVisibleLine);
049:                        swtWindowWidget.getStyledText().addVerifyKeyListener(
050:                                SwtWindow.this );
051:                        swtWindowWidget.getStyledText().addKeyListener(
052:                                SwtWindow.this );
053:                        swtWindowWidget.getStyledText().addFocusListener(
054:                                SwtWindow.this );
055:                        swtWindowWidget.getStyledText().addMouseListener(
056:                                SwtWindow.this );
057:                        swtWindowWidget.getStyledText().forceFocus();
058:                        swtWindowWidget.getStyledText().setCaretOffset(
059:                                swtBuffer.getDot());
060:                    }
061:                });
062:                updateModeline();
063:            }
064:
065:            /**
066:             * @see gnu.jemacs.buffer.EWindow#setBuffer(gnu.jemacs.buffer.Buffer)
067:             */
068:            public void setBuffer(Buffer buffer) {
069:                super .setBuffer(buffer);
070:                this .swtBuffer = (SwtBuffer) buffer;
071:                if (swtWindowWidget != null) {
072:                    SwtHelper.setContent(swtWindowWidget.getStyledText(),
073:                            swtBuffer.getBufferContent());
074:                    updateModeline();
075:                }
076:            }
077:
078:            /**
079:             * The purpose of this method is to emulate the 'toInt' method of SwingWindow
080:             * so as to transform Swt KeyEvents into the same int's as equivalent awt KeyEvents.
081:             * 
082:             * TODO: Elaborate this method so that all KeyEvents work (e.g. enter (!))
083:             * 
084:             * I've been thinkin it perhaps would be better to make EKeymap abstract with implementors 
085:             * for each toolkit, and then lookup commands by Swt events directly when running
086:             * Swt and Swing events when running swing. Must be considered more... 
087:             * 
088:             *  
089:             * @param swtKeyCode
090:             * @param stateMask
091:             * @param additionalFlags
092:             * @return
093:             */
094:            private int transFormKeyKode(int swtKeyCode, int stateMask,
095:                    int additionalFlags) {
096:                int characterPart = Character
097:                        .toUpperCase((char) (swtKeyCode & 0xFFFF));
098:                int modifierPart = (stateMask & swtModifiers) >> 1; // awt modifiers seem to be displaced
099:                // one bit to the left relative to 
100:                // swt modifiers.
101:                return characterPart | modifierPart | (additionalFlags << 16);
102:            }
103:
104:            private final static int swtModifiers = SWT.SHIFT | SWT.CTRL
105:                    | SWT.ALT;
106:
107:            public void handleKey(int code) {
108:                Object command = lookupKey(code);
109:                if (command == null) {
110:                    return;
111:                }
112:                pushPrefix(code);
113:                pendingLength--;
114:                handleCommand(command);
115:            }
116:
117:            public void handleCommand(Object command) {
118:                int oldDot = getBuffer().getDot();
119:                super .handleCommand(command);
120:                updateModeline();
121:                if (oldDot != getBuffer().getDot()) {
122:                    swtWindowWidget.getStyledText().showSelection();
123:                }
124:            }
125:
126:            /**
127:             * @see gnu.jemacs.buffer.EWindow#setSelected()
128:             */
129:            public void setSelected() {
130:                super .setSelected();
131:                buffer.pointMarker.sequence = null;
132:            }
133:
134:            /**
135:             * @see gnu.jemacs.buffer.EWindow#unselect()
136:             */
137:            public void unselect() {
138:            }
139:
140:            /**
141:             * @see gnu.jemacs.buffer.EWindow#getPoint()
142:             */
143:            public int getPoint() {
144:                return SwtHelper
145:                        .getCaretOffset(swtWindowWidget.getStyledText());
146:            }
147:
148:            /**
149:             * @see gnu.jemacs.buffer.EWindow#setDot(int)
150:             */
151:            public void setDot(int offset) {
152:                SwtHelper.setCaretOffset(swtWindowWidget.getStyledText(),
153:                        offset);
154:            }
155:
156:            public EWindow split(Buffer buffer, int lines, boolean horizontal) {
157:                SwtWindow newWindow = new SwtWindow(buffer);
158:                newWindow.frame = this .frame;
159:                linkSibling(newWindow, horizontal);
160:
161:                int firstVisibleLine = buffer == this .buffer ? SwtHelper
162:                        .getTopIndex(swtWindowWidget.getStyledText()) : 0;
163:                int visibleLines = SwtHelper.getArea(swtWindowWidget
164:                        .getStyledText()).height
165:                        / SwtHelper.getLineHeight(swtWindowWidget
166:                                .getStyledText());
167:
168:                int[] weights = null;
169:                if (!horizontal && lines > 0 && visibleLines > 1) {
170:                    weights = new int[2];
171:                    lines = Math.min(lines, visibleLines - 1);
172:                    weights[0] = lines;
173:                    weights[1] = visibleLines - lines;
174:                }
175:
176:                SwtHelper.injectSashFormAsParent(swtWindowWidget,
177:                        horizontal ? SWT.HORIZONTAL : SWT.VERTICAL);
178:                newWindow.getReadyToShow(SwtHelper.getParent(swtWindowWidget),
179:                        firstVisibleLine);
180:                if (weights != null)
181:                    SwtHelper.setWeights(((SashForm) SwtHelper
182:                            .getParent(swtWindowWidget)), weights);
183:                SwtHelper.layout(SwtHelper.getParent(SwtHelper
184:                        .getParent(swtWindowWidget)));
185:
186:                return newWindow;
187:            }
188:
189:            /**
190:             * @see gnu.jemacs.buffer.EWindow#getCharSize()
191:             */
192:            protected void getCharSize() {
193:                // TODO
194:            }
195:
196:            /**
197:             * @see gnu.jemacs.buffer.EWindow#getWidth()
198:             */
199:            public int getWidth() {
200:                return SwtHelper.getArea(swtWindowWidget.getStyledText()).width;
201:            }
202:
203:            /**
204:             * @see gnu.jemacs.buffer.EWindow#getHeight()
205:             */
206:            public int getHeight() {
207:                return SwtHelper.getArea(swtWindowWidget.getStyledText()).height;
208:            }
209:
210:            /**
211:             * @see gnu.jemacs.buffer.EWindow#tooLong(int)
212:             */
213:            public Object tooLong(int pendingLength) {
214:                // TODO Something more subtle here
215:                return null;
216:            }
217:
218:            // ---------------------------- Listener methods ------------------------------------
219:
220:            // --- VerifyKeyListener
221:            public void verifyKey(VerifyEvent event) {
222:                event.doit = false;
223:            }
224:
225:            // --- FocusListener ---
226:            public void focusGained(FocusEvent e) {
227:                setSelected();
228:            }
229:
230:            public void focusLost(FocusEvent e) {
231:                unselect();
232:            }
233:
234:            // --- KeyListener ---
235:            public void keyPressed(KeyEvent e) {
236:                handleKey(SwtKeyMapper.swtKey2EKey(e));
237:                SwtHelper.setCaretOffset(swtWindowWidget.getStyledText(),
238:                        buffer.getDot());
239:            }
240:
241:            public void keyReleased(KeyEvent e) {
242:            }
243:
244:            // --- MouseListener ---
245:            public void mouseDoubleClick(MouseEvent e) {
246:            }
247:
248:            public void mouseDown(MouseEvent e) {
249:                if (EWindow.getSelected() == this ) // Is this nessecary - aren't we always selected when this event arrives?
250:                {
251:                    buffer.setDot(SwtHelper.getCaretOffset(swtWindowWidget
252:                            .getStyledText()));
253:                    SwtHelper.showSelection(swtWindowWidget.getStyledText());
254:                }
255:            }
256:
257:            public void mouseUp(MouseEvent e) {
258:            }
259:
260:            /**
261:             * @param e
262:             */
263:            public static void show(KeyEvent e) {
264:                System.out.println("keyCode:   " + EKeymap.show(e.keyCode));
265:                System.out.println("character: " + EKeymap.show(e.character));
266:                System.out.println("stateMask: " + EKeymap.show(e.stateMask));
267:            }
268:
269:            public void updateModeline() {
270:                if (swtWindowWidget != null) {
271:                    SwtHelper.getDisplay().asyncExec(new Runnable() {
272:                        public void run() {
273:                            swtWindowWidget.getModeline().setText(
274:                                    swtBuffer.getModelineFormat().toString());
275:                        }
276:                    });
277:                }
278:            }
279:
280:        }
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