/// <summary>Removes a previously registered observer.</summary>
/// <remarks>
/// Removes a previously registered observer. The observer must not be null and it
/// must already have been registered.
/// </remarks>
/// <param name="observer">the observer to unregister</param>
/// <exception cref="System.ArgumentException">the observer is null</exception>
/// <exception cref="System.InvalidOperationException">the observer is not yet registered
/// </exception>
public virtual void unregisterObserver(T observer)
{
if ((object)observer == null)
{
throw new System.ArgumentException("The observer is null.");
}
lock (mObservers)
{
int index = mObservers.indexOf(observer);
if (index == -1)
{
throw new System.InvalidOperationException("Observer " + observer + " was not registered."
);
}
mObservers.remove(index);
}
}
private android.view.View findNextFocus(android.view.ViewGroup root, android.view.View
focused, android.graphics.Rect focusedRect, int direction)
{
java.util.ArrayList <android.view.View> focusables = root.getFocusables(direction);
if (focusables.isEmpty())
{
// The focus cannot change.
return(null);
}
if (direction == android.view.View.FOCUS_FORWARD || direction == android.view.View
.FOCUS_BACKWARD)
{
if (focused != null && !focusables.contains(focused))
{
// Add the currently focused view to the list to have it sorted
// along with the other views.
focusables.add(focused);
}
try
{
// Note: This sort is stable.
mSequentialFocusComparator.setRoot(root);
java.util.Collections.sort(focusables, mSequentialFocusComparator);
}
finally
{
mSequentialFocusComparator.recycle();
}
int count = focusables.size();
switch (direction)
{
case android.view.View.FOCUS_FORWARD:
{
if (focused != null)
{
int position = focusables.lastIndexOf(focused);
if (position >= 0 && position + 1 < count)
{
return(focusables.get(position + 1));
}
}
return(focusables.get(0));
}
case android.view.View.FOCUS_BACKWARD:
{
if (focused != null)
{
int position = focusables.indexOf(focused);
if (position > 0)
{
return(focusables.get(position - 1));
}
}
return(focusables.get(count - 1));
}
}
return(null);
}
// initialize the best candidate to something impossible
// (so the first plausible view will become the best choice)
mBestCandidateRect.set(focusedRect);
switch (direction)
{
case android.view.View.FOCUS_LEFT:
{
mBestCandidateRect.offset(focusedRect.width() + 1, 0);
break;
}
case android.view.View.FOCUS_RIGHT:
{
mBestCandidateRect.offset(-(focusedRect.width() + 1), 0);
break;
}
case android.view.View.FOCUS_UP:
{
mBestCandidateRect.offset(0, focusedRect.height() + 1);
break;
}
case android.view.View.FOCUS_DOWN:
{
mBestCandidateRect.offset(0, -(focusedRect.height() + 1));
break;
}
}
android.view.View closest = null;
int numFocusables = focusables.size();
{
for (int i = 0; i < numFocusables; i++)
{
android.view.View focusable = focusables.get(i);
// only interested in other non-root views
if (focusable == focused || focusable == root)
{
continue;
}
// get visible bounds of other view in same coordinate system
focusable.getDrawingRect(mOtherRect);
root.offsetDescendantRectToMyCoords(focusable, mOtherRect);
if (isBetterCandidate(direction, focusedRect, mOtherRect, mBestCandidateRect))
{
mBestCandidateRect.set(mOtherRect);
closest = focusable;
}
}
}
return(closest);
}
public static void CreateArffFiles()
{
java.util.ArrayList atts;
java.util.ArrayList attsRel;
java.util.ArrayList attVals;
java.util.ArrayList attValsRel;
Instances data;
Instances dataRel;
double[] vals;
double[] valsRel;
int i;
// 1. set up attributes
atts = new java.util.ArrayList();
// - numeric
atts.Add(new weka.core.Attribute("att1"));
// - nominal
attVals = new java.util.ArrayList();
for (i = 0; i < 5; i++)
{
attVals.add("val" + (i + 1));
}
weka.core.Attribute nominal = new weka.core.Attribute("att2", attVals);
atts.add(nominal);
// - string
atts.add(new weka.core.Attribute("att3", (java.util.ArrayList)null));
// - date
atts.add(new weka.core.Attribute("att4", "yyyy-MM-dd"));
// - relational
attsRel = new java.util.ArrayList();
// -- numeric
attsRel.add(new weka.core.Attribute("att5.1"));
// -- nominal
attValsRel = new java.util.ArrayList();
for (i = 0; i < 5; i++)
{
attValsRel.Add("val5." + (i + 1));
}
attsRel.add(new weka.core.Attribute("att5.2", attValsRel));
dataRel = new Instances("att5", attsRel, 0);
atts.add(new weka.core.Attribute("att5", dataRel, 0));
// 2. create Instances object
data = new Instances("MyRelation", atts, 0);
// 3. fill with data
// first instance
vals = new double[data.numAttributes()];
// - numeric
vals[0] = Math.PI;
// - nominal
vals[1] = attVals.indexOf("val3");
// - string
vals[2] = data.attribute(2).addStringValue("This is a string!");
// - date
vals[3] = data.attribute(3).parseDate("2001-11-09");
// - relational
dataRel = new Instances(data.attribute(4).relation(), 0);
// -- first instance
valsRel = new double[2];
valsRel[0] = Math.PI + 1;
valsRel[1] = attValsRel.indexOf("val5.3");
weka.core.Instance inst = new DenseInstance(2);
inst.setValue(1, valsRel[0]);
inst.setValue(1, valsRel[1]);
dataRel.add(inst);
// -- second instance
valsRel = new double[2];
valsRel[0] = Math.PI + 2;
valsRel[1] = attValsRel.indexOf("val5.2");
dataRel.add(inst);
vals[4] = data.attribute(4).addRelation(dataRel);
// add
weka.core.Instance inst2 = new DenseInstance(4);
inst2.setValue(1, vals[0]);
inst2.setValue(1, vals[1]);
inst2.setValue(1, vals[2]);
inst2.setValue(1, vals[3]);
data.add(inst2);
// second instance
vals = new double[data.numAttributes()]; // important: needs NEW array!
// - numeric
vals[0] = Math.E;
// - nominal
vals[1] = attVals.indexOf("val1");
// - string
vals[2] = data.attribute(2).addStringValue("And another one!");
// - date
vals[3] = data.attribute(3).parseDate("2000-12-01");
// - relational
dataRel = new Instances(data.attribute(4).relation(), 0);
// -- first instance
valsRel = new double[2];
valsRel[0] = Math.E + 1;
valsRel[1] = attValsRel.indexOf("val5.4");
dataRel.add(inst);
// -- second instance
valsRel = new double[2];
valsRel[0] = Math.E + 2;
valsRel[1] = attValsRel.indexOf("val5.1");
dataRel.add(inst);
vals[4] = data.attribute(4).addRelation(dataRel);
// add
data.add(inst2);
data.setClassIndex(data.numAttributes() - 1);
// 4. output data
for (int x = 0; x < data.numInstances(); x++)
{
weka.core.Instance ins = data.instance(x);
System.Console.WriteLine(ins.value(x).ToString());
}
return;
}
