Improve TaskList plugin

* Automatically reload task lists.
 * Add task handler to stop the reloading
 * Add some really simple API for other plugins to use.

src/plugins/tasklist/taskfile.cpp

@@ -0,0 +1,128 @@
+/**************************************************************************
+**
+** This file is part of Qt Creator
+**
+** Copyright (c) 2010 Nokia Corporation and/or its subsidiary(-ies).
+**
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** Commercial Usage
+**
+** Licensees holding valid Qt Commercial licenses may use this file in
+** accordance with the Qt Commercial License Agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and Nokia.
+**
+** GNU Lesser General Public License Usage
+**
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** If you are unsure which license is appropriate for your use, please
+** contact the sales department at http://qt.nokia.com/contact.
+**
+**************************************************************************/
+
+#include "taskfile.h"
+
+#include "tasklistplugin.h"
+
+using namespace TaskList;
+using namespace TaskList::Internal;
+
+// --------------------------------------------------------------------------
+// TaskFile
+// --------------------------------------------------------------------------
+
+TaskFile::TaskFile(QObject *parent) : Core::IFile(parent),
+    m_context(0)
+{ }
+
+TaskFile::~TaskFile()
+{ }
+
+bool TaskFile::save(const QString &fileName)
+{
+    Q_UNUSED(fileName);
+    return false;
+}
+
+QString TaskFile::fileName() const
+{
+    return m_fileName;
+}
+
+QString TaskFile::defaultPath() const
+{
+    return QString();
+}
+
+QString TaskFile::suggestedFileName() const
+{
+    return QString();
+}
+
+QString TaskFile::mimeType() const
+{
+    return QString();
+}
+
+bool TaskFile::isModified() const
+{
+    return false;
+}
+
+bool TaskFile::isReadOnly() const
+{
+    return true;
+}
+
+bool TaskFile::isSaveAsAllowed() const
+{
+    return false;
+}
+
+Core::IFile::ReloadBehavior TaskFile::reloadBehavior(ChangeTrigger state, ChangeType type) const
+{
+    Q_UNUSED(state);
+    if (type != TypePermissions)
+        return BehaviorSilent;
+    return BehaviorAsk;
+}
+
+void TaskFile::reload(ReloadFlag flag, ChangeType type)
+{
+    Q_UNUSED(flag);
+
+    if (type == TypePermissions)
+        return;
+    open(m_fileName);
+    if (type == TypeRemoved)
+        deleteLater();
+}
+
+void TaskFile::rename(const QString &newName)
+{
+    Q_UNUSED(newName);
+}
+
+bool TaskFile::open(const QString &fileName)
+{
+    m_fileName = fileName;
+    return TaskList::TaskListPlugin::instance()->loadFile(m_context, m_fileName);
+}
+
+ProjectExplorer::Project *TaskFile::context() const
+{
+    return m_context;
+}
+
+void TaskFile::setContext(ProjectExplorer::Project *context)
+{
+    m_context = context;
+}
+