X-Git-Url: http://gitweb.fperrin.net/?p=GpsPrune.git;a=blobdiff_plain;f=src%2Ftim%2Fprune%2Fcorrelate%2FOptionsChangedListener.java;fp=src%2Ftim%2Fprune%2Fcorrelate%2FOptionsChangedListener.java;h=2da93e6fc4ede147bdf76c9b928c433817d51afa;hp=0000000000000000000000000000000000000000;hb=ce6f2161b8596f7018d6a76bff79bc9e571f35fd;hpb=2d8cb72e84d5cc1089ce77baf1e34ea3ea2f8465

diff --git a/src/tim/prune/correlate/OptionsChangedListener.java b/src/tim/prune/correlate/OptionsChangedListener.java
new file mode 100644
index 0000000..2da93e6
--- /dev/null
+++ b/src/tim/prune/correlate/OptionsChangedListener.java
@@ -0,0 +1,98 @@
+package tim.prune.correlate;
+
+import java.awt.event.ActionListener;
+import java.awt.event.ActionEvent;
+import java.awt.event.ItemEvent;
+import java.awt.event.ItemListener;
+import java.awt.event.KeyEvent;
+import java.awt.event.KeyListener;
+
+/**
+ * Helper class to listen for changed options on the Correlators
+ * Tightly coupled but only to ok button and preview function
+ */
+public class OptionsChangedListener implements KeyListener, ActionListener, ItemListener, Runnable
+{
+	/** Correlator object for callbacks */
+	private Correlator _correlator;
+	/** Thread counter */
+	private int _threadCount = 0;
+
+	/** Default delay time from change to preview trigger */
+	private static final long PREVIEW_DELAY_TIME = 2500L;
+
+
+	/**
+	 * Constructor
+	 * @param inCorrelator correlator object for callbacks
+	 */
+	public OptionsChangedListener(Correlator inCorrelator)
+	{
+		_correlator = inCorrelator;
+	}
+
+	/**
+	 * Respond to actions performed on control
+	 * @see java.awt.event.ActionListener#actionPerformed(java.awt.event.ActionEvent)
+	 */
+	public void actionPerformed(ActionEvent inEvent)
+	{
+		optionsChanged();
+	}
+
+	/**
+	 * Run method, called by separate thread(s)
+	 * @see java.lang.Runnable#run()
+	 */
+	public void run()
+	{
+		// Wait for a certain time
+		try {
+			Thread.sleep(PREVIEW_DELAY_TIME);
+		}
+		catch (InterruptedException ie) {}
+		_threadCount--;
+		if (_threadCount == 0) {
+			// trigger preview (false means automatic)
+			_correlator.createPreview(false);
+		}
+	}
+
+	/**
+	 * Respond to key pressed event
+	 * @param inEvent event
+	 */
+	public void keyPressed(KeyEvent inEvent)
+	{
+		optionsChanged();
+	}
+
+	/** Ignore key released events */
+	public void keyReleased(KeyEvent inEvent) {}
+
+	/** Ignore key typed events */
+	public void keyTyped(KeyEvent e) {}
+
+	/**
+	 * Respond to item change events (eg dropdown)
+	 * @see java.awt.event.ItemListener#itemStateChanged(java.awt.event.ItemEvent)
+	 */
+	public void itemStateChanged(ItemEvent inEvent)
+	{
+		if (inEvent.getStateChange() == ItemEvent.SELECTED) {
+			optionsChanged();
+		}
+	}
+
+	/**
+	 * Trigger that an option has changed, whatever type
+	 */
+	private void optionsChanged()
+	{
+		// disable ok button
+		_correlator.disableOkButton();
+		// start new thread to trigger preview
+		_threadCount++;
+		new Thread(this).start();
+	}
+}