Source Code Cross Referenced for SWTNumberAxisEditor.java in  » Chart » jfreechart » org » jfree » experimental » chart » swt » editor » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Chart » jfreechart » org.jfree.experimental.chart.swt.editor 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /* ===========================================================
002:         * JFreeChart : a free chart library for the Java(tm) platform
003:         * ===========================================================
004:         *
005:         * (C) Copyright 2000-2006, by Object Refinery Limited and Contributors.
006:         *
007:         * Project Info:  http://www.jfree.org/jfreechart/index.html
008:         *
009:         * This library is free software; you can redistribute it and/or modify it 
010:         * under the terms of the GNU Lesser General Public License as published by 
011:         * the Free Software Foundation; either version 2.1 of the License, or 
012:         * (at your option) any later version.
013:         *
014:         * This library is distributed in the hope that it will be useful, but 
015:         * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY 
016:         * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public 
017:         * License for more details.
018:         *
019:         * You should have received a copy of the GNU Lesser General Public
020:         * License along with this library; if not, write to the Free Software
021:         * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, 
022:         * USA.  
023:         *
024:         * [Java is a trademark or registered trademark of Sun Microsystems, Inc. 
025:         * in the United States and other countries.]
026:         *
027:         * ------------------------
028:         * SWTNumberAxisEditor.java
029:         * ------------------------
030:         * (C) Copyright 2006, by Henry Proudhon and Contributors.
031:         *
032:         * Original Author:  Henry Proudhon (henry.proudhon AT insa-lyon.fr);
033:         * Contributor(s):   David Gilbert (for Object Refinery Limited);
034:         *
035:         * Changes
036:         * -------
037:         * 01-Aug-2006 : New class (HP);
038:         * 
039:         */
040:
041:        package org.jfree.experimental.chart.swt.editor;
042:
043:        import org.eclipse.swt.SWT;
044:        import org.eclipse.swt.events.FocusEvent;
045:        import org.eclipse.swt.events.FocusListener;
046:        import org.eclipse.swt.events.SelectionAdapter;
047:        import org.eclipse.swt.events.SelectionEvent;
048:        import org.eclipse.swt.layout.GridData;
049:        import org.eclipse.swt.layout.GridLayout;
050:        import org.eclipse.swt.widgets.Button;
051:        import org.eclipse.swt.widgets.Composite;
052:        import org.eclipse.swt.widgets.Label;
053:        import org.eclipse.swt.widgets.TabItem;
054:        import org.eclipse.swt.widgets.Text;
055:        import org.jfree.chart.axis.Axis;
056:        import org.jfree.chart.axis.NumberAxis;
057:
058:        /**
059:         * An editor for {@link NumberAxis} properties.
060:         */
061:        class SWTNumberAxisEditor extends SWTAxisEditor implements 
062:                FocusListener {
063:
064:            /** A flag that indicates whether or not the axis range is determined
065:             *  automatically.
066:             */
067:            private boolean autoRange;
068:
069:            /** The lowest value in the axis range. */
070:            private double minimumValue;
071:
072:            /** The highest value in the axis range. */
073:            private double maximumValue;
074:
075:            /** A checkbox that indicates whether or not the axis range is determined
076:             *  automatically.
077:             */
078:            private Button autoRangeCheckBox;
079:
080:            /** A text field for entering the minimum value in the axis range. */
081:            private Text minimumRangeValue;
082:
083:            /** A text field for entering the maximum value in the axis range. */
084:            private Text maximumRangeValue;
085:
086:            /**
087:             * Creates a new editor.
088:             * 
089:             * @param parent  the parent.
090:             * @param style  the style.
091:             * @param axis  the axis.
092:             */
093:            public SWTNumberAxisEditor(Composite parent, int style,
094:                    NumberAxis axis) {
095:                super (parent, style, axis);
096:                this .autoRange = axis.isAutoRange();
097:                this .minimumValue = axis.getLowerBound();
098:                this .maximumValue = axis.getUpperBound();
099:
100:                TabItem item2 = new TabItem(getOtherTabs(), SWT.NONE);
101:                item2.setText(" " + localizationResources.getString("Range")
102:                        + " ");
103:                Composite range = new Composite(getOtherTabs(), SWT.NONE);
104:                range.setLayout(new GridLayout(2, true));
105:                item2.setControl(range);
106:
107:                autoRangeCheckBox = new Button(range, SWT.CHECK);
108:                autoRangeCheckBox.setText(localizationResources
109:                        .getString("Auto-adjust_range"));
110:                autoRangeCheckBox.setLayoutData(new GridData(SWT.FILL,
111:                        SWT.CENTER, true, false, 2, 1));
112:                autoRangeCheckBox.setSelection(this .autoRange);
113:                autoRangeCheckBox.addSelectionListener(new SelectionAdapter() {
114:                    public void widgetSelected(SelectionEvent e) {
115:                        toggleAutoRange();
116:                    }
117:                });
118:                new Label(range, SWT.NONE).setText(localizationResources
119:                        .getString("Minimum_range_value"));
120:                this .minimumRangeValue = new Text(range, SWT.BORDER);
121:                this .minimumRangeValue.setText(String
122:                        .valueOf(this .minimumValue));
123:                this .minimumRangeValue.setLayoutData(new GridData(SWT.FILL,
124:                        SWT.CENTER, true, false));
125:                this .minimumRangeValue.setEnabled(!this .autoRange);
126:                //this.minimumRangeValue.addModifyListener(this);
127:                //this.minimumRangeValue.addVerifyListener(this);
128:                this .minimumRangeValue.addFocusListener(this );
129:                new Label(range, SWT.NONE).setText(localizationResources
130:                        .getString("Maximum_range_value"));
131:                this .maximumRangeValue = new Text(range, SWT.BORDER);
132:                this .maximumRangeValue.setText(String
133:                        .valueOf(this .maximumValue));
134:                this .maximumRangeValue.setLayoutData(new GridData(SWT.FILL,
135:                        SWT.CENTER, true, false));
136:                this .maximumRangeValue.setEnabled(!this .autoRange);
137:                //this.maximumRangeValue.addModifyListener(this);
138:                //this.maximumRangeValue.addVerifyListener(this);
139:                this .maximumRangeValue.addFocusListener(this );
140:            }
141:
142:            /**
143:             *  Toggle the auto range setting.
144:             */
145:            public void toggleAutoRange() {
146:                this .autoRange = this .autoRangeCheckBox.getSelection();
147:                if (this .autoRange) {
148:                    this .minimumRangeValue.setText(Double
149:                            .toString(this .minimumValue));
150:                    this .minimumRangeValue.setEnabled(false);
151:                    this .maximumRangeValue.setText(Double
152:                            .toString(this .maximumValue));
153:                    this .maximumRangeValue.setEnabled(false);
154:                } else {
155:                    this .minimumRangeValue.setEnabled(true);
156:                    this .maximumRangeValue.setEnabled(true);
157:                }
158:            }
159:
160:            /**
161:             * Revalidate the range minimum:
162:             * it should be less than the current maximum.
163:             * 
164:             * @param candidate  the minimum value
165:             * 
166:             * @return A boolean.
167:             */
168:            public boolean validateMinimum(String candidate) {
169:                boolean valid = true;
170:                try {
171:                    if (Double.parseDouble(candidate) >= this .maximumValue) {
172:                        valid = false;
173:                    }
174:                } catch (NumberFormatException e) {
175:                    valid = false;
176:                }
177:                return valid;
178:            }
179:
180:            /**
181:             * Revalidate the range maximum:
182:             * it should be greater than the current minimum
183:             * 
184:             * @param candidate  the maximum value
185:             * 
186:             * @return A boolean.
187:             */
188:            public boolean validateMaximum(String candidate) {
189:                boolean valid = true;
190:                try {
191:                    if (Double.parseDouble(candidate) <= this .minimumValue) {
192:                        valid = false;
193:                    }
194:                } catch (NumberFormatException e) {
195:                    valid = false;
196:                }
197:                return valid;
198:            }
199:
200:            /* (non-Javadoc)
201:             * @see org.eclipse.swt.events.FocusListener#focusGained(
202:             * org.eclipse.swt.events.FocusEvent)
203:             */
204:            public void focusGained(FocusEvent e) {
205:                // don't need to do anything
206:            }
207:
208:            /* (non-Javadoc)
209:             * @see org.eclipse.swt.events.FocusListener#focusLost(
210:             * org.eclipse.swt.events.FocusEvent)
211:             */
212:            public void focusLost(FocusEvent e) {
213:                if (e.getSource() == this .minimumRangeValue) {
214:                    // verify min value
215:                    if (!validateMinimum(this .minimumRangeValue.getText()))
216:                        this .minimumRangeValue.setText(String
217:                                .valueOf(this .minimumValue));
218:                    else
219:                        this .minimumValue = Double
220:                                .parseDouble(this .minimumRangeValue.getText());
221:                } else if (e.getSource() == this .maximumRangeValue) {
222:                    // verify max value
223:                    if (!validateMaximum(this .maximumRangeValue.getText()))
224:                        this .maximumRangeValue.setText(String
225:                                .valueOf(this .maximumValue));
226:                    else
227:                        this .maximumValue = Double
228:                                .parseDouble(this .maximumRangeValue.getText());
229:                }
230:            }
231:
232:            /**
233:             * Sets the properties of the specified axis to match 
234:             * the properties defined on this panel.
235:             *
236:             * @param axis  the axis.
237:             */
238:            public void setAxisProperties(Axis axis) {
239:                super .setAxisProperties(axis);
240:                NumberAxis numberAxis = (NumberAxis) axis;
241:                numberAxis.setAutoRange(this.autoRange);
242:                if (!this.autoRange)
243:                    numberAxis.setRange(this.minimumValue, this.maximumValue);
244:            }
245:        }
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