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+/* Copyright 2013 MultiMC Contributors
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#pragma once
+
+#include <QObject>
+#include <QVariant>
+#include <QAbstractListModel>
+
+#include "logic/BaseVersion.h"
+
+class Task;
+
+/*!
+ * \brief Class that each instance type's version list derives from.
+ * Version lists are the lists that keep track of the available game versions
+ * for that instance. This list will not be loaded on startup. It will be loaded
+ * when the list's load function is called. Before using the version list, you
+ * should check to see if it has been loaded yet and if not, load the list.
+ *
+ * Note that this class also inherits from QAbstractListModel. Methods from that
+ * class determine how this version list shows up in a list view. Said methods
+ * all have a default implementation, but they can be overridden by plugins to
+ * change the behavior of the list.
+ */
+class BaseVersionList : public QAbstractListModel
+{
+ Q_OBJECT
+public:
+ enum ModelRoles
+ {
+ VersionPointerRole = 0x34B1CB48
+ };
+
+ enum VListColumns
+ {
+ // First column - Name
+ NameColumn = 0,
+
+ // Second column - Type
+ TypeColumn,
+
+ // Third column - Timestamp
+ TimeColumn
+ };
+
+ explicit BaseVersionList(QObject *parent = 0);
+
+ /*!
+ * \brief Gets a task that will reload the version list.
+ * Simply execute the task to load the list.
+ * The task returned by this function should reset the model when it's done.
+ * \return A pointer to a task that reloads the version list.
+ */
+ virtual Task *getLoadTask() = 0;
+
+ //! Checks whether or not the list is loaded. If this returns false, the list should be
+ //loaded.
+ virtual bool isLoaded() = 0;
+
+ //! Gets the version at the given index.
+ virtual const BaseVersionPtr at(int i) const = 0;
+
+ //! Returns the number of versions in the list.
+ virtual int count() const = 0;
+
+ //////// List Model Functions ////////
+ virtual QVariant data(const QModelIndex &index, int role) const;
+ virtual QVariant headerData(int section, Qt::Orientation orientation, int role) const;
+ virtual int rowCount(const QModelIndex &parent) const;
+ virtual int columnCount(const QModelIndex &parent) const;
+
+ /*!
+ * \brief Finds a version by its descriptor.
+ * \param The descriptor of the version to find.
+ * \return A const pointer to the version with the given descriptor. NULL if
+ * one doesn't exist.
+ */
+ virtual BaseVersionPtr findVersion(const QString &descriptor);
+
+ /*!
+ * \brief Gets the latest stable version of this instance type.
+ * This is the version that will be selected by default.
+ * By default, this is simply the first version in the list.
+ */
+ virtual BaseVersionPtr getLatestStable() const;
+
+ /*!
+ * Sorts the version list.
+ */
+ virtual void sort() = 0;
+
+protected
+slots:
+ /*!
+ * Updates this list with the given list of versions.
+ * This is done by copying each version in the given list and inserting it
+ * into this one.
+ * We need to do this so that we can set the parents of the versions are set to this
+ * version list. This can't be done in the load task, because the versions the load
+ * task creates are on the load task's thread and Qt won't allow their parents
+ * to be set to something created on another thread.
+ * To get around that problem, we invoke this method on the GUI thread, which
+ * then copies the versions and sets their parents correctly.
+ * \param versions List of versions whose parents should be set.
+ */
+ virtual void updateListData(QList<BaseVersionPtr> versions) = 0;
+};