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package ca.spaz.gui; |
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import java.awt.event.*; |
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import java.io.File; |
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import java.lang.reflect.Method; |
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import java.util.*; |
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import javax.swing.*; |
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import javax.swing.border.*; |
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import javax.xml.parsers.*; |
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import org.w3c.dom.*; |
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public class SpazCanvas extends JPanel implements ActionListener { |
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protected Hashtable actions, components; |
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protected Object listener; |
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public SpazCanvas(String file) { |
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super(); |
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init(file); |
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} |
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public SpazCanvas(String file, Object listener) { |
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super(); |
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this.listener = listener; |
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init(file); |
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} |
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private void init(String file) { |
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this.actions = new Hashtable(); |
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this.components = new Hashtable(); |
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this.setLayout(new SpazLayout()); |
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loadXML(file); |
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} |
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public void setListener(Object l) { |
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this.listener = l; |
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} |
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public void loadXML(String fname) { |
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try { |
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DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance(); |
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dbf.setNamespaceAware(true); |
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DocumentBuilder db = dbf.newDocumentBuilder(); |
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File f = new File(fname); |
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Document d = db.parse(f); |
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Element e = d.getDocumentElement(); |
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parseChildren(e); |
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} catch (Exception e) { |
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e.printStackTrace(); |
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} |
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} |
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public SpazPosition getPosition(JComponent c) { |
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return ((SpazLayout)this.getLayout()).getPosition(c); |
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} |
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public String getAction(JComponent c) { |
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return (String)actions.get(c); |
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} |
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public JComponent getComponent(String idStr) { |
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return (JComponent)components.get(idStr); |
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} |
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public Enumeration components() { |
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return components.elements(); |
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} |
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public void parseChildren(Element e) { |
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try { |
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NodeList nl = e.getChildNodes(); |
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for (int i = 0; i < nl.getLength(); i++) { |
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if ((nl.item(i).getNodeType() == Node.ELEMENT_NODE)) { |
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Element elm = (Element)nl.item(i); |
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String tag = elm.getTagName(); |
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if (tag.equals("canvas")) { |
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parseChildren(elm); |
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} else if (tag.equals("label")) { |
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parseLabel(elm); |
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} else if (tag.equals("textfield")) { |
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parseTextField(elm); |
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} else if (tag.equals("button")) { |
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parseButton(elm); |
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} else if (tag.equals("textarea")) { |
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parseTextArea(elm); |
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} else if (tag.equals("progressbar")) { |
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parseProgressBar(elm); |
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} |
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} |
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} |
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} catch (Exception ex) { |
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ex.printStackTrace(); |
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} |
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} |
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public void parseTextArea(Element elm) { |
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JTextPane text = new JTextPane(); |
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JScrollPane jsp = |
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new JScrollPane( |
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text, |
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JScrollPane.VERTICAL_SCROLLBAR_AS_NEEDED, |
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JScrollPane.HORIZONTAL_SCROLLBAR_NEVER); |
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jsp.setAutoscrolls(true); |
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SpazPosition lp = parseSpazPosition(elm); |
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if (lp == null) |
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return; |
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this.add(jsp, lp); |
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parseBorder(jsp, elm); |
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parseAttributes(elm, jsp); |
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} |
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public void parseLabel(Element elm) { |
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JLabel label = new JLabel(); |
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String title = elm.getAttribute("title"); |
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if (title != null) |
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label.setText(title); |
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SpazPosition lp = parseSpazPosition(elm); |
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if (lp == null) |
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return; |
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this.add(label, lp); |
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parseBorder(label, elm); |
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parseAttributes(elm, label); |
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} |
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public void parseProgressBar(Element elm) { |
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JProgressBar bar = new JProgressBar(); |
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SpazPosition lp = parseSpazPosition(elm); |
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if (lp == null) |
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return; |
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this.add(bar, lp); |
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parseBorder(bar, elm); |
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parseAttributes(elm, bar); |
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} |
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public void parseButton(Element elm) { |
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JButton btn = new JButton(); |
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String title = elm.getAttribute("title"); |
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if (title != null) |
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btn.setText(title); |
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SpazPosition lp = parseSpazPosition(elm); |
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if (lp == null) |
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return; |
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this.add(btn, lp); |
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parseBorder(btn, elm); |
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parseAttributes(elm, btn); |
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String action = elm.getAttribute("action"); |
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if (action.length() > 0) { |
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actions.put(btn, action); |
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btn.addActionListener(this); |
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} |
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} |
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public void parseTextField(Element elm) { |
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String title = ""; |
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JTextField textField = new JTextField(title); |
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SpazPosition lp = parseSpazPosition(elm); |
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if (lp == null) |
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return; |
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this.add(textField, lp); |
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parseBorder(textField, elm); |
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parseAttributes(elm, textField); |
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} |
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public void parseAttributes(Element elm, JComponent comp) { |
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String enabled = elm.getAttribute("enabled"); |
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if (enabled != null) |
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comp.setEnabled(!enabled.equals("false")); |
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String id = elm.getAttribute("id"); |
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if (id.length() > 0) { |
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components.put(id, comp); |
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comp.setName(id); |
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} |
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String tooltip = elm.getAttribute("tooltip"); |
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if (tooltip.length() > 0) { |
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comp.setToolTipText(tooltip); |
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} |
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} |
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public SpazPosition parseSpazPosition(Element elm) { |
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if (elm.getTagName().equals("position")) { |
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SpazPosition lp = new SpazPosition(); |
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double left_rel = Double.parseDouble(elm.getAttribute("left_rel")); |
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double right_rel = Double.parseDouble(elm.getAttribute("right_rel")); |
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double top_rel = Double.parseDouble(elm.getAttribute("top_rel")); |
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double bottom_rel = Double.parseDouble(elm.getAttribute("bottom_rel")); |
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int left_abs = Integer.parseInt(elm.getAttribute("left_abs")); |
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int right_abs = Integer.parseInt(elm.getAttribute("right_abs")); |
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int top_abs = Integer.parseInt(elm.getAttribute("top_abs")); |
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int bottom_abs = Integer.parseInt(elm.getAttribute("bottom_abs")); |
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lp.setHPos(left_rel, left_abs, right_rel, right_abs); |
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lp.setVPos(top_rel, top_abs, bottom_rel, bottom_abs); |
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return lp; |
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} else { |
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NodeList nl = elm.getElementsByTagName("position"); |
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for (int n = 0; n < nl.getLength(); n++) { |
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SpazPosition lp = parseSpazPosition((Element) (nl.item(n))); |
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return lp; |
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} |
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} |
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return null; |
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} |
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public void parseBorder(JComponent c, Element elm) { |
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if (elm.getTagName().equals("border")) { |
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String type = elm.getAttribute("type"); |
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if (type.equals("empty")) { |
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c.setBorder(new EmptyBorder(2, 2, 2, 2)); |
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} else if (type.equals("titled")) { |
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String title = elm.getAttribute("title"); |
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c.setBorder(new TitledBorder(title)); |
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} else if (type.equals("beveled")) { |
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int btype = Integer.parseInt(elm.getAttribute("bevel")); |
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c.setBorder(new BevelBorder(btype)); |
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} |
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} else { |
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NodeList nl = elm.getElementsByTagName("border"); |
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for (int n = 0; n < nl.getLength(); n++) { |
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parseBorder(c, (Element)nl.item(n)); |
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} |
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} |
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} |
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public void actionPerformed(ActionEvent e) { |
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if (listener == null) |
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return; |
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String methodName = (String)actions.get(e.getSource()); |
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if (methodName != null) { |
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try { |
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Class[] params = null; |
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Method m = listener.getClass().getMethod(methodName, params); |
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Object[] params2 = null; |
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m.invoke(listener, params2); |
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} catch (NoSuchMethodException me) { |
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JOptionPane.showMessageDialog(this, |
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"No Action Handler for '" + methodName + "'"); |
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} catch (Exception ex) { |
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ex.printStackTrace(); |
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} |
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} |
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} |
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} |