Source Code Cross Referenced for JGraphpadRichTextEditor.java in  » Graphic-Library » jgraphpad » com » jgraph » pad » graph » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Graphic Library » jgraphpad » com.jgraph.pad.graph 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        package com.jgraph.pad.graph;
002:
003:        import java.awt.Component;
004:        import java.awt.Container;
005:        import java.awt.Dimension;
006:        import java.awt.Font;
007:        import java.awt.event.ActionEvent;
008:        import java.awt.event.KeyEvent;
009:        import java.awt.geom.Rectangle2D;
010:        import java.util.EventObject;
011:        import java.util.Map;
012:
013:        import javax.swing.AbstractAction;
014:        import javax.swing.AbstractCellEditor;
015:        import javax.swing.JComponent;
016:        import javax.swing.JLabel;
017:        import javax.swing.JTextPane;
018:        import javax.swing.KeyStroke;
019:        import javax.swing.SwingUtilities;
020:        import javax.swing.UIManager;
021:        import javax.swing.event.DocumentEvent;
022:        import javax.swing.event.DocumentListener;
023:        import javax.swing.text.BadLocationException;
024:        import javax.swing.text.Document;
025:        import javax.swing.text.SimpleAttributeSet;
026:        import javax.swing.text.StyleConstants;
027:        import javax.swing.text.StyledDocument;
028:
029:        import org.jgraph.JGraph;
030:        import org.jgraph.graph.CellView;
031:        import org.jgraph.graph.DefaultGraphCellEditor;
032:        import org.jgraph.graph.GraphCellEditor;
033:        import org.jgraph.graph.GraphConstants;
034:
035:        /**
036:         * In-place editor for rich text multiline values.
037:         */
038:        public class JGraphpadRichTextEditor extends DefaultGraphCellEditor {
039:
040:            /**
041:             * Constructs a new rich text editor.
042:             */
043:            public JGraphpadRichTextEditor() {
044:                super ();
045:            }
046:
047:            /**
048:             * Utlitiy editor for rich text values.
049:             */
050:            class RealCellEditor extends AbstractCellEditor implements 
051:                    GraphCellEditor {
052:
053:                /**
054:                 * Holds the component used for editing.
055:                 */
056:                JTextPane editorComponent = new JTextPane();
057:
058:                /**
059:                 * Constructs a new editor that supports shift- and control-enter
060:                 * keystrokes to insert newlines into the editing component.
061:                 */
062:                public RealCellEditor() {
063:                    editorComponent.setBorder(UIManager
064:                            .getBorder("Tree.editorBorder"));
065:                    // editorComponent.setLineWrap(true);
066:                    // editorComponent.setWrapStyleWord(true);
067:                    // substitute a JTextArea's VK_ENTER action with our own that
068:                    // will stop an edit.
069:                    editorComponent.getInputMap(JComponent.WHEN_FOCUSED).put(
070:                            KeyStroke.getKeyStroke(KeyEvent.VK_ENTER, 0),
071:                            "enter");
072:                    editorComponent.getInputMap(JComponent.WHEN_FOCUSED).put(
073:                            KeyStroke.getKeyStroke(KeyEvent.VK_ENTER,
074:                                    KeyEvent.SHIFT_DOWN_MASK), "metaEnter");
075:                    editorComponent.getInputMap(JComponent.WHEN_FOCUSED).put(
076:                            KeyStroke.getKeyStroke(KeyEvent.VK_ENTER,
077:                                    KeyEvent.CTRL_DOWN_MASK), "metaEnter");
078:                    editorComponent.getActionMap().put("enter",
079:                            new AbstractAction() {
080:
081:                                public void actionPerformed(ActionEvent e) {
082:                                    stopCellEditing();
083:                                }
084:                            });
085:                    editorComponent.getActionMap().put("metaEnter",
086:                            new AbstractAction() {
087:
088:                                public void actionPerformed(ActionEvent e) {
089:                                    Document doc = editorComponent
090:                                            .getDocument();
091:                                    try {
092:                                        doc
093:                                                .insertString(editorComponent
094:                                                        .getCaretPosition(),
095:                                                        "\n", null);
096:                                    } catch (BadLocationException e1) {
097:                                        e1.printStackTrace();
098:                                    }
099:                                }
100:                            });
101:                }
102:
103:                /**
104:                 * Sets of the editor for editing the rich text value.
105:                 */
106:                public Component getGraphCellEditorComponent(JGraph graph,
107:                        Object value, boolean isSelected) {
108:                    Rectangle2D cellBounds = graph.getCellBounds(value);
109:                    if (cellBounds != null) {
110:                        Dimension maxSize = new Dimension((int) cellBounds
111:                                .getWidth(), (int) cellBounds.getHeight());
112:                        editorComponent.setMaximumSize(maxSize);
113:                    }
114:                    Object cell = value;
115:                    value = graph.getModel().getValue(value);
116:                    if (value instanceof  JGraphpadBusinessObject
117:                            && ((JGraphpadBusinessObject) value).isRichText())
118:                        try {
119:                            StyledDocument document = (StyledDocument) editorComponent
120:                                    .getDocument();
121:
122:                            ((JGraphpadRichTextValue) ((JGraphpadBusinessObject) value)
123:                                    .getValue()).insertInto(document);
124:
125:                            // Workaround for trailing newline
126:                            if (document.getLength() > 0)
127:                                document.remove(document.getLength() - 1, 1);
128:
129:                            // Workaround for the alignment not being serializable:
130:                            // We use the label's alignment as the global alignment
131:                            CellView view = graph.getGraphLayoutCache()
132:                                    .getMapping(cell, false);
133:                            if (view != null) {
134:                                Map map = view.getAllAttributes();
135:                                int align = GraphConstants
136:                                        .getHorizontalAlignment(map);
137:                                SimpleAttributeSet sas = new SimpleAttributeSet();
138:                                align = (align == JLabel.CENTER) ? StyleConstants.ALIGN_CENTER
139:                                        : (align == JLabel.RIGHT) ? StyleConstants.ALIGN_RIGHT
140:                                                : StyleConstants.ALIGN_LEFT;
141:                                StyleConstants.setAlignment(sas, align);
142:                                document.setParagraphAttributes(0, document
143:                                        .getLength(), sas, true);
144:                            }
145:                        } catch (Exception e) {
146:                            e.printStackTrace();
147:                        }
148:                    else {
149:                        editorComponent.setText(value.toString());
150:                    }
151:                    editorComponent.selectAll();
152:                    editorComponent.getDocument().addDocumentListener(
153:                            new DocumentListener() {
154:
155:                                public void updateSize() {
156:                                    SwingUtilities.invokeLater(new Runnable() {
157:
158:                                        public void run() {
159:                                            Container container = editorComponent
160:                                                    .getParent();
161:                                            if (container != null) {
162:                                                container.doLayout();
163:                                                container
164:                                                        .setSize(editingContainer
165:                                                                .getPreferredSize());
166:                                                container.invalidate();
167:                                            }
168:                                        }
169:                                    });
170:                                }
171:
172:                                public void insertUpdate(DocumentEvent arg0) {
173:                                    updateSize();
174:                                }
175:
176:                                public void removeUpdate(DocumentEvent arg0) {
177:                                    updateSize();
178:                                }
179:
180:                                public void changedUpdate(DocumentEvent arg0) {
181:                                    updateSize();
182:                                }
183:                            });
184:                    return editorComponent;
185:                }
186:
187:                /**
188:                 * Returns the rich text value to be stored in the user object.
189:                 */
190:                public Object getCellEditorValue() {
191:                    return new JGraphpadRichTextValue(editorComponent
192:                            .getDocument());
193:                }
194:
195:                /**
196:                 * Transfers the focus to the editing component.
197:                 */
198:                public boolean shouldSelectCell(EventObject event) {
199:                    editorComponent.requestFocus();
200:                    return super .shouldSelectCell(event);
201:                }
202:            }
203:
204:            /**
205:             * Overriding this in order to set the size of an editor to that of an
206:             * edited view.
207:             */
208:            public Component getGraphCellEditorComponent(JGraph graph,
209:                    Object cell, boolean isSelected) {
210:                Component component = super .getGraphCellEditorComponent(graph,
211:                        cell, isSelected);
212:                // set the size of an editor to that of the view
213:                CellView view = graph.getGraphLayoutCache().getMapping(cell,
214:                        false);
215:                Rectangle2D tmp = view.getBounds();
216:                editingComponent.setBounds((int) tmp.getX(), (int) tmp.getY(),
217:                        (int) tmp.getWidth(), (int) tmp.getHeight());
218:                // I have to set a font here instead of in the
219:                // RealCellEditor.getGraphCellEditorComponent() because
220:                // I don't know what cell is being edited when in the
221:                // RealCellEditor.getGraphCellEditorComponent().
222:                Font font = GraphConstants.getFont(view.getAllAttributes());
223:                editingComponent.setFont((font != null) ? font : graph
224:                        .getFont());
225:                return component;
226:            }
227:
228:            /**
229:             * Returns a new RealCellEditor.
230:             */
231:            protected GraphCellEditor createGraphCellEditor() {
232:                return new JGraphpadRichTextEditor.RealCellEditor();
233:            }
234:
235:            /**
236:             * Overriting this so that I could modify an editor container. See also
237:             * <A
238:             * HREF="http://sourceforge.net/forum/forum.php?thread_id=781479&forum_id=140880">here</A>.
239:             */
240:            protected Container createContainer() {
241:                return new JGraphpadRichTextEditor.ModifiedEditorContainer();
242:            }
243:
244:            /**
245:             * Utitlitiy container with a custom layout.
246:             */
247:            class ModifiedEditorContainer extends EditorContainer {
248:
249:                /**
250:                 * Performs the layout of the components in the container.
251:                 */
252:                public void doLayout() {
253:                    super .doLayout();
254:                    // substract 2 pixels that were added to the preferred size of
255:                    // the container for the border.
256:                    Dimension cSize = getSize();
257:                    Dimension dim = editingComponent.getSize();
258:                    editingComponent.setSize(dim.width - 2, dim.height);
259:                    // reset container's size based on a potentially new preferred
260:                    // size of a real editor.
261:                    setSize(cSize.width, getPreferredSize().height);
262:                }
263:            }
264:        }
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