X-Git-Url: https://git.pterodactylus.net/?a=blobdiff_plain;f=src%2Fmain%2Fjava%2Fnet%2Fpterodactylus%2Fsonitus%2Fgui%2FPipelinePanel.java;h=8c5fa1555d2158df9b72c5f2ca54c6c559d4dae2;hb=fa5196e029c48636f0c318311244395cfae49953;hp=ab1c484fbc2bcd4d63c768c53d673b9ae682ef91;hpb=45f83831984a48fefacb09f3754502f530fc158e;p=sonitus.git

diff --git a/src/main/java/net/pterodactylus/sonitus/gui/PipelinePanel.java b/src/main/java/net/pterodactylus/sonitus/gui/PipelinePanel.java
index ab1c484..8c5fa15 100644
--- a/src/main/java/net/pterodactylus/sonitus/gui/PipelinePanel.java
+++ b/src/main/java/net/pterodactylus/sonitus/gui/PipelinePanel.java
@@ -22,12 +22,16 @@ import static javax.swing.BorderFactory.createEtchedBorder;
 import java.awt.GridBagConstraints;
 import java.awt.GridBagLayout;
 import java.awt.Insets;
+import java.awt.event.MouseAdapter;
+import java.awt.event.MouseEvent;
 import java.util.Collection;
+import java.util.EventListener;
 import java.util.List;
 import javax.swing.JLabel;
 import javax.swing.JPanel;
+import javax.swing.event.EventListenerList;
 
-import net.pterodactylus.sonitus.data.Controlled;
+import net.pterodactylus.sonitus.data.ControlledComponent;
 import net.pterodactylus.sonitus.data.Filter;
 import net.pterodactylus.sonitus.data.Pipeline;
 import net.pterodactylus.sonitus.data.Sink;
@@ -45,6 +49,9 @@ public class PipelinePanel extends JPanel {
 	/** The pipeline being displayed. */
 	private final Pipeline pipeline;
 
+	/** The component hover listeners. */
+	private final EventListenerList componentHoverListeners = new EventListenerList();
+
 	/**
 	 * Creates a new pipeline panel displaying the given pipeline.
 	 *
@@ -58,6 +65,20 @@ public class PipelinePanel extends JPanel {
 	}
 
 	//
+	// LISTENER MANAGEMENT
+	//
+
+	/**
+	 * Adds the given component hover listener to this panel.
+	 *
+	 * @param componentHoverListener
+	 * 		The component hover listener to add
+	 */
+	public void addComponentHoverListener(ComponentHoverListener componentHoverListener) {
+		componentHoverListeners.add(ComponentHoverListener.class, componentHoverListener);
+	}
+
+	//
 	// PRIVATE METHODS
 	//
 
@@ -94,7 +115,7 @@ public class PipelinePanel extends JPanel {
 	/**
 	 * Displays the given component.
 	 *
-	 * @param controlled
+	 * @param controlledComponent
 	 * 		The component to add this panel.
 	 * @param level
 	 * 		The level at which to show the component (the source is level {@code 0})
@@ -103,21 +124,30 @@ public class PipelinePanel extends JPanel {
 	 * @param width
 	 * 		The width of the component in grid cells
 	 */
-	private void addControlled(Controlled controlled, int level, int position, int width) {
+	private void addControlled(final ControlledComponent controlledComponent, int level, int position, int width) {
 		/* create a GUI component that displays the component. */
-		JLabel sourceLabel = new JLabel(controlled.name());
+		JLabel sourceLabel = new JLabel(controlledComponent.name());
 		sourceLabel.setBorder(createEtchedBorder());
+		sourceLabel.addMouseListener(new MouseAdapter() {
+
+			@Override
+			public void mouseEntered(MouseEvent mouseEvent) {
+				for (ComponentHoverListener componentHoverListener : componentHoverListeners.getListeners(ComponentHoverListener.class)) {
+					componentHoverListener.componentEntered(controlledComponent);
+				}
+			}
+		});
 
 		/* show component. */
 		add(sourceLabel, new GridBagConstraints(position, level, width, 1, 1.0, 1.0, GridBagConstraints.CENTER, GridBagConstraints.BOTH, new Insets(0, 0, 0, 0), 0, 0));
 
 		/* if the component does not have connected sinks, exit here. */
-		if (!(controlled instanceof Source)) {
+		if (!(controlledComponent instanceof Source)) {
 			return;
 		}
 
 		/* iterate over the component’s sinks. */
-		Collection<Sink> sinks = pipeline.sinks((Source) controlled);
+		Collection<Sink> sinks = pipeline.sinks((Source) controlledComponent);
 		int sinkWidth = width / sinks.size();
 		int sinkIndex = 0;
 		for (Sink connectedSink : sinks) {
@@ -127,4 +157,23 @@ public class PipelinePanel extends JPanel {
 		}
 	}
 
+	/**
+	 * Interface for objects that want to be notified if the user moves the mouse
+	 * cursor over a controlled component.
+	 *
+	 * @author <a href="mailto:bombe@pterodactylus.net">David ‘Bombe’ Roden</a>
+	 */
+	public static interface ComponentHoverListener extends EventListener {
+
+		/**
+		 * Notifies the listener that the mouse is now over the given controlled
+		 * component.
+		 *
+		 * @param controlledComponent
+		 * 		The controlled component now under the mouse
+		 */
+		void componentEntered(ControlledComponent controlledComponent);
+
+	}
+
 }