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Monthly Archives: September 2009
Quick Example to Java Scripting Engine
Have you heard that Java support scripting engine? Try the source code below:
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import javax.script.ScriptEngine; import javax.script.ScriptEngineManager; import javax.script.ScriptException; public class TestScript { public static void main(String[] args) { String script = "println('Hello, world');"; script += "s=0;"; script += "for(var i=1; i<=100; i++)"; script += "s += i;"; script += "println('s='+s);"; ScriptEngineManager factory = new ScriptEngineManager(); ScriptEngine engine = factory.getEngineByName("JavaScript"); try { engine.eval(script); } catch (ScriptException e) { e.printStackTrace(); } } } |
Eclipse: Dynamically Adjust Widget Size and Reflow a Form Page
Let’s say you need to dynamically adjust a widget size, and then update scroll bar information. Things are pretty simple, if we understand how eclipse layout works. I have a PageBook widget, and wish to resize the form page as … Continue reading
Posted in eclipse, java
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Code Snippet to use PageBook
Below is very straightforward code snippet to use PageBook. It is used together with eclipse form. Therefore you will see widgets are created via the FormToolkit class.
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toolkit = new FormToolkit(container.getDisplay()); form = toolkit.createScrolledForm(container); Composite parent = form.getBody(); GridLayoutFactory.fillDefaults().numColumns(1).applyTo(parent); // create a table as selection provider final Table table = toolkit.createTable(parent, SWT.BORDER | SWT.VIRTUAL); table.setHeaderVisible(true); table.setLinesVisible(true); for(int i=1; i<=12; i++){ TableItem item = new TableItem(table, 0); item.setText("Item " + i); } toolkit.createLabel(parent, "Selected pagebook:"); // create a PageBook final ScrolledPageBook pageBook = toolkit.createPageBook(parent, SWT.NONE); GridDataFactory.defaultsFor(pageBook).grab(true, true).applyTo(pageBook); // create PageBook controls for(int i=0; i<table.getItemCount(); i++){ TableItem item = table.getItem(i); Composite pageContainer = pageBook.createPage(item.getText()); GridLayoutFactory.fillDefaults().numColumns(1).applyTo(pageContainer); toolkit.createLabel(pageContainer, item.getText()); toolkit.createText(pageContainer, "to be edited"); pageBook.showPage(item.getText()); } pageBook.showEmptyPage(); // add selection listener, and show relative PageBook on selection table.addSelectionListener(new SelectionAdapter(){ public void widgetSelected(SelectionEvent e) { TableItem item = (TableItem) e.item; pageBook.showPage(item.getText()); } }); |