"abstract" classes moved to a separate directory

src/org/geometerplus/android/fbreader/tree/BaseActivity.java

@@ -0,0 +1,115 @@
+/*
+ * Copyright (C) 2010-2011 Geometer Plus <contact@geometerplus.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301, USA.
+ */
+
+package org.geometerplus.android.fbreader.tree;
+
+import android.app.ListActivity;
+import android.content.Intent;
+import android.os.Bundle;
+import android.view.KeyEvent;
+import android.view.View;
+
+import org.geometerplus.android.util.UIUtil;
+
+import org.geometerplus.fbreader.tree.FBTree;
+
+public abstract class BaseActivity extends ListActivity implements View.OnCreateContextMenuListener {
+	private FBTree myCurrentTree;
+
+	@Override
+	public void onCreate(Bundle icicle) {
+		super.onCreate(icicle);
+		Thread.setDefaultUncaughtExceptionHandler(new org.geometerplus.zlibrary.ui.android.library.UncaughtExceptionHandler(this));
+
+		getListView().setOnCreateContextMenuListener(this);
+	}
+
+	@Override
+	public ListAdapter getListAdapter() {
+		return (ListAdapter)super.getListAdapter();
+	}
+
+	protected FBTree getCurrentTree() {
+		return myCurrentTree;
+	}
+
+	protected void setCurrentTree(FBTree tree) {
+		myCurrentTree = tree;
+	}
+
+	public abstract int getCoverResourceId(FBTree tree);
+	public abstract boolean isTreeSelected(FBTree tree);
+
+	@Override
+	public boolean onKeyDown(int keyCode, KeyEvent event) {
+		if (keyCode == KeyEvent.KEYCODE_BACK && myCurrentTree.Parent != null) {
+			final FBTree oldTree = myCurrentTree;
+			openTree(myCurrentTree.Parent);
+			setSelection(getListAdapter().getIndex(oldTree));
+			return true;
+		} else {
+			return super.onKeyDown(keyCode, event);
+		}
+	}
+
+	protected void openTree(final FBTree tree) {
+		switch (tree.getOpeningStatus()) {
+			case WAIT_FOR_OPEN:
+			case ALWAYS_RELOAD_BEFORE_OPENING:
+				final String messageKey = tree.getOpeningStatusMessage();
+				if (messageKey != null) {
+					UIUtil.runWithMessage(
+						BaseActivity.this, messageKey,
+						new Runnable() {
+							public void run() {
+								tree.waitForOpening();
+							}
+						},
+						new Runnable() {
+							public void run() {
+								openTreeInternal(tree);
+							}
+						}
+					);
+				} else {
+					tree.waitForOpening();
+					openTreeInternal(tree);
+				}
+				break;
+			default:
+				openTreeInternal(tree);
+				break;
+		}
+	}
+
+	private void openTreeInternal(FBTree tree) {
+		switch (tree.getOpeningStatus()) {
+			case READY_TO_OPEN:
+			case ALWAYS_RELOAD_BEFORE_OPENING:
+				myCurrentTree = tree;
+				getListAdapter().replaceAll(myCurrentTree.subTrees());
+				setTitle(myCurrentTree.getTreeTitle());
+				setSelection(getListAdapter().getFirstSelectedItemIndex());
+				break;
+			case CANNOT_OPEN:
+				UIUtil.showErrorMessage(BaseActivity.this, tree.getOpeningStatusMessage());
+				break;
+		}
+	}
+}