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package sk.upjs.jpaz2;
import java.awt.*;
import java.awt.event.*;
import javax.imageio.*;
import javax.swing.*;
import sk.upjs.jpaz2.inspector.OIPanel;
/**
* The visual GUI based object inspector. The object inspector allows to watch
* and change object's properties and invoke object's methods.
*/
public class ObjectInspector {
/**
* A record about an object inserted for inspection in the object inspector.
*/
private static class ObjectItem {
/**
* Inspected object
*/
Object object;
/**
* Alias for the object (if not null, this name is displayed in the
* ComboBox)
*/
String alias;
/**
* Stop class for object inspection.
*/
Class stopClass;
/**
* Constructs a new record about an inspected object.
*
* @param object
* the inspected object
* @param stopClass
* the stop class
* @param alias
* the alias name for the object
*/
public ObjectItem(Object object, Class stopClass, String alias) {
if (object == null)
throw new NullPointerException("The inspected object cannot be null.");
if (alias != null) {
alias = alias.trim();
if (alias.length() == 0) {
alias = null;
}
}
this.object = object;
this.alias = alias;
this.stopClass = stopClass;
}
@Override
public String toString() {
if (alias == null) {
return object.toString();
} else {
return alias;
}
}
}
// ---------------------------------------------------------------------------------------------------
// Internal GUI objects
// ---------------------------------------------------------------------------------------------------
/**
* JFrame visualizing the ObjectInspector
*/
private JFrame frame;
/**
* Panel visualizing one object
*/
private OIPanel oipanel;
/**
* JComboBox for choosing one object that is visualized in the oipanel
*/
private JComboBox objectComboBox;
// ---------------------------------------------------------------------------------------------------
// Constructors
// ---------------------------------------------------------------------------------------------------
/**
* Constructs a new object inspector. Initially, the object inspector is
* invisible and empty.
*/
public ObjectInspector() {
JPAZUtilities.lockHeadlessMode();
if (JPAZUtilities.isHeadlessMode()) {
throw new IllegalStateException("Object inspector cannot is not allowed in headless mode.");
}
JPAZUtilities.invokeAndWait(new Runnable() {
public void run() {
prepareGUI();
}
});
}
/**
* Constructs a new ObjectInspector that is visible and initially inspects a
* given object.
*
* @param object
* the inspected object
*/
public ObjectInspector(Object object) {
this();
inspect(object);
}
// ---------------------------------------------------------------------------------------------------
// Management of inspected objects. All inspected object are stored in as
// objects of the ComboBox.
// ---------------------------------------------------------------------------------------------------
/**
* Adds a new object for inspection into the object inspector.
*
* @param object
* the inspected object
* @param stopClass
* the stop class for inspection. The stop class is a super of
* the object's class. All properties and methods defined in this
* class and its super classes will not be displayed in the
* object inspector.
* @param alias
* the alias name for the object. Alias is displayed in the
* ComboBox for choosing the currently inspected object.
*/
public void inspect(Object object, Class stopClass, String alias) {
// construct a record about inspected object
final ObjectItem item = new ObjectItem(object, stopClass, alias);
// insert the record for inspection into the JComboBox (objectComboBox)
// within the SWING EDT.
JPAZUtilities.invokeAndWait(new Runnable() {
public void run() {
// check for duplicity - maybe the inserted object is
// already here
boolean found = false;
for (int i = 0; i < objectComboBox.getItemCount(); i++) {
if (((ObjectItem) objectComboBox.getItemAt(i)).object == item.object) {
found = true;
break;
}
}
// if the object is not in the Object Inspector, we insert
// it.
if (!found) {
objectComboBox.addItem(item);
}
}
});
}
/**
* Adds a new object for inspection into the object inspector.
*
* @param object
* the inspected object.
*/
public void inspect(Object object) {
inspect(object, null, null);
}
/**
* Adds a new object for inspection into the object inspector.
*
* @param object
* the inspected object.
* @param stopClass
* the stop class for inspection. The stop class is a super of
* the object's class. All properties and methods defined in this
* class and its super classes will not be displayed in the
* object inspector.
*/
public void inspect(Object object, Class stopClass) {
inspect(object, stopClass, null);
}
/**
* Adds a new object for inspection into the object inspector.
*
* @param object
* the inspected object.
* @param alias
* the alias name for the object. Alias is displayed in the
* ComboBox for choosing the currently inspected object.
*/
public void inspect(Object object, String alias) {
inspect(object, null, alias);
}
/**
* Removes the object from inspection of the object inspector.
*
* @param object
* the desired object
*/
public void remove(final Object object) {
if (object == null) {
return;
}
JPAZUtilities.invokeAndWait(new Runnable() {
public void run() {
for (int i = 0; i < objectComboBox.getItemCount(); i++) {
if (((ObjectItem) objectComboBox.getItemAt(i)).object == object) {
objectComboBox.removeItemAt(i);
break;
}
}
}
});
}
// ---------------------------------------------------------------------------------------------------
// Methods for simple configuration
// ---------------------------------------------------------------------------------------------------
// ---------------------------------------------------------------------------------------------------
// GUI settings
// ---------------------------------------------------------------------------------------------------
/**
* Sets the visibility of the Object Inspector window.
*
* @param visible
* if true, shows Object Inspector; otherwise, hides it.
*/
public void setVisible(final boolean visible) {
JPAZUtilities.invokeAndWait(new Runnable() {
public void run() {
frame.setVisible(visible);
}
});
}
/**
* Gets the visibility of the Object Inspector window.
*
* @return true, if the Object Inspector is visible, false otherwise.
*/
public boolean isVisible() {
return (Boolean) JPAZUtilities.invokeAndWait(new JPAZUtilities.Computable() {
public Object compute() {
return frame.isVisible();
}
});
}
/**
* Prepares and initialized the GUI window.
*/
private void prepareGUI() {
// create frame
frame = new JFrame("Object Inspector");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setBounds(0, 0, 250, 430);
// create object inspector panel
oipanel = new OIPanel();
objectComboBox = new JComboBox();
objectComboBox.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
ObjectItem item = (ObjectItem) objectComboBox.getSelectedItem();
if (item != null)
oipanel.setInspectedObject(item.object, item.stopClass);
else
oipanel.setInspectedObject(null, null);
}
});
// set icon
try {
frame.setIconImage(ImageIO.read(this.getClass().getResource("/sk/upjs/jpaz2/images/binocular.png")));
} catch (Exception e) {
// nothing to do
}
// set initial position
Rectangle screenBounds = JPAZUtilities.getScreenBounds();
if (screenBounds != null) {
frame.setLocation(screenBounds.x, screenBounds.y);
}
// set layout and insert components
frame.setLayout(new BorderLayout());
frame.add(objectComboBox, BorderLayout.PAGE_START);
frame.add(oipanel, BorderLayout.CENTER);
// set frame visible
frame.setVisible(true);
}
}
