package edu.cmu.hcii.whyline.ui;
import java.awt.Dimension;
import java.awt.Toolkit;
import java.awt.event.ActionEvent;
import javax.swing.AbstractAction;
import javax.swing.Action;
import javax.swing.tree.TreePath;
import edu.cmu.hcii.whyline.qa.Explanation;
import edu.cmu.hcii.whyline.qa.Question;
import edu.cmu.hcii.whyline.qa.WhyDidEventOccur;
import edu.cmu.hcii.whyline.trace.Trace;
import edu.cmu.hcii.whyline.trace.nodes.*;
import edu.cmu.hcii.whyline.ui.components.HeadlinedTreePanel;
import edu.cmu.hcii.whyline.ui.components.WhylineButton;
/**
* @author Andrew J. Ko
*
*/
public final class ObjectsUI extends HeadlinedTreePanel<ObjectState> {
private final Action explainAction = new AbstractAction("explain") {
public void actionPerformed(ActionEvent e) {
DynamicNode<?> node = getSelectedDynamicNode();
if(node != null) {
int eventID = node.getAssociatedEventID();
Question<?> q = new WhyDidEventOccur(whylineUI, eventID, getTrace().getDescription(eventID));
whylineUI.answer(q);
}
}
};
private final Action removeAction = new AbstractAction("" + UI.MINUS) {
public void actionPerformed(ActionEvent e) {
whylineUI.getObjectsUI().removeObject(getSelectedObjectID());
setEnabled(false);
}
};
private final Action previousAssignment = new AbstractAction("previous =") {
public void actionPerformed(ActionEvent e) {
Explanation explanation = getExplanationOfPreviousOrNextFieldAssignment(false);
if(explanation == null) Toolkit.getDefaultToolkit().beep();
else whylineUI.selectExplanation(explanation,true, "objects");
}
};
private final Action nextAssignment = new AbstractAction("next =") {
public void actionPerformed(ActionEvent e) {
Explanation explanation = getExplanationOfPreviousOrNextFieldAssignment(true);
if(explanation == null) Toolkit.getDefaultToolkit().beep();
else whylineUI.selectExplanation(explanation,true, "objects");
}
};
public ObjectsUI(WhylineUI whylineUI) {
super("objects", whylineUI);
setMinimumSize(new Dimension(UI.getDefaultInfoPaneWidth(whylineUI), 0));
setPreferredSize(new Dimension(UI.getDefaultInfoPaneWidth(whylineUI), UI.getDefaultInfoPaneHeight(whylineUI)));
removeAction.setEnabled(false);
addTool(new WhylineButton(removeAction, "remove the selected object from the watch list"));
if(whylineUI.isWhyline()) {
addTool(new WhylineButton(explainAction, "explain why the selected field has its value"));
addTool(new WhylineButton(previousAssignment, "find the previous assignment to this field"));
addTool(new WhylineButton(nextAssignment, "find the next assignment to this field"));
}
}
private Explanation getExplanationOfPreviousOrNextFieldAssignment(boolean next) {
if(!(getSelectedDynamicNode() instanceof FieldState))
return null;
FieldState field = (FieldState)getSelectedDynamicNode();
int eventID = field.getCurrentEventID();
int assignmentID =
next ?
getTrace().findFieldAssignmentAfter(field.getField(), field.getObjectID(), eventID + 1) :
getTrace().findFieldAssignmentBefore(field.getField(), field.getObjectID(), eventID - 1);
if(assignmentID == eventID || assignmentID < 0)
return null;
else
return whylineUI.getVisualizationUIVisible().getAnswer().getExplanationFor(assignmentID);
}
public boolean isWatching(long objectID) { return getRoot().getChildren().contains(getTrace().getObjectNode(objectID)); }
protected void handleSelection() {
Node<?> selection = getSelectedNode();
long objectID = getSelectedObjectID();
removeAction.setEnabled(objectID > 0);
if(whylineUI.isWhyline()) {
DynamicNode<?> node = getSelectedDynamicNode();
explainAction.setEnabled(node != null && node.getAssociatedEventID() > 0);
if(objectID > 0) whylineUI.getGraphicsUI().setHighlight(whylineUI.getTrace().getObjectNode(objectID));
previousAssignment.setEnabled(node instanceof FieldState);
nextAssignment.setEnabled(node instanceof FieldState);
}
}
public long getSelectedObjectID() {
TreePath path = getSelectionPath();
if(path== null || path.getPathCount() <= 1) return 0;
Object selection = path.getPathComponent(1);
return selection instanceof ReferenceState ? ((ReferenceState)selection).getObjectIDForChildren() : 0;
}
public void showEventID(int eventID) {
if(!whylineUI.isDynamicInfoShowing()) return;
for(ObjectState obj : getRoot().getChildren())
obj.propagateCurrentEventID(eventID);
DynamicNode<?> state = getSelectedDynamicNode();
if(state != null) state.update();
updateTree();
}
public void addObject(long objectID) {
ObjectState obj = getTrace().getObjectNode(objectID);
getRoot().addChild(obj);
updateTree();
whylineUI.getPersistentState().addRelevantObject(objectID);
}
public void removeObject(long objectID) {
getRoot().removeChild(getTrace().getObjectNode(objectID));
updateTree();
whylineUI.getPersistentState().removeRelevantObject(objectID);
}
public void removeAllObjects() {
getRoot().resetChildren();
updateTree();
}
protected boolean isLeaf(Node<?> node) { return node instanceof FieldState; }
public Trace getTrace() { return whylineUI.getTrace(); }
protected void handleExpansion() {
if(getSelectedDynamicNode() instanceof ReferenceState) {
ReferenceState ref = (ReferenceState)getSelectedDynamicNode();
for(ReferenceState node : ref.getChildren())
node.propagateCurrentEventID(ref.getCurrentEventID());
}
}
}
