Added OnClickListener for header view

1 files changed, 55 insertions, 0 deletions

diff --git a/src/de/danoeh/antennapod/adapter/OnItemlistHeaderClicked.java b/src/de/danoeh/antennapod/adapter/OnItemlistHeaderClicked.java
new file mode 100644
index 000000000..14bb06051
--- /dev/null
+++ b/src/de/danoeh/antennapod/adapter/OnItemlistHeaderClicked.java
@@ -0,0 +1,55 @@
+package de.danoeh.antennapod.adapter;
+
+import de.danoeh.antennapod.R;
+import android.content.res.TypedArray;
+import android.view.View;
+import android.view.View.OnClickListener;
+import android.widget.ImageView;
+
+/**
+ * OnClickListener for the itemlist headers of feeditem lists. This class takes
+ * care of changing the appearance of the arrow on the left side of the header
+ * view. An instance of this class should be set as the OnClickListener of the
+ * header view.
+ */
+public class OnItemlistHeaderClicked implements OnClickListener {
+	private ImageView arrow;
+	private View header;
+
+	private boolean isExpanded;
+
+	/**
+	 * Constructor
+	 * 
+	 * @param header
+	 *            Reference to the header View of the itemlist.
+	 * @param isExpanded
+	 *            true if the itemlist is currently expanded.
+	 * */
+	public OnItemlistHeaderClicked(View header, boolean isExpanded) {
+		if (header == null)
+			throw new IllegalArgumentException("Header view must not be null");
+		this.header = header;
+		arrow = (ImageView) header.findViewById(R.id.imgvHeaderArrow);
+		this.isExpanded = isExpanded;
+		refreshArrowState();
+	}
+
+	private void refreshArrowState() {
+		TypedArray typeDrawables = header.getContext().obtainStyledAttributes(
+				new int[] { R.attr.navigation_collapse,
+						R.attr.navigation_expand });
+		if (isExpanded) {
+			arrow.setImageDrawable(typeDrawables.getDrawable(0));
+		} else {
+			arrow.setImageDrawable(typeDrawables.getDrawable(1));
+		}
+	}
+
+	@Override
+	public void onClick(View v) {
+		isExpanded = !isExpanded;
+		refreshArrowState();
+	}
+
+}