12 files changed, 1299 insertions, 1 deletions

diff --git a/gui/MainWindow.cpp b/gui/MainWindow.cpp
index 568607a7..830a4fb4 100644
--- a/gui/MainWindow.cpp
+++ b/gui/MainWindow.cpp
@@ -68,6 +68,7 @@
 #include "dialogs/ScreenshotDialog.h"
 
 #include "gui/ConsoleWindow.h"
+#include "pagedialog/PageDialog.h"
 
 #include "logic/InstanceList.h"
 #include "logic/minecraft/MinecraftVersionList.h"
@@ -1043,7 +1044,13 @@ void MainWindow::on_actionEditInstance_triggered()
 {
 	if (m_selectedInstance)
 	{
-		auto dialog = m_selectedInstance->createModEditDialog(this);
+		auto provider = std::dynamic_pointer_cast<BasePageProvider>(m_selectedInstance);
+		if(!provider)
+		{
+			QLOG_ERROR() << "Instance can't be converted to BasePageProvider (NYI)";
+			return;
+		}
+		auto dialog = new PageDialog(provider, this);
 		if (dialog)
 			dialog->exec();
 		dialog->deleteLater();
diff --git a/gui/pagedialog/PageDialog.cpp b/gui/pagedialog/PageDialog.cpp
new file mode 100644
index 00000000..0dda7c1f
--- /dev/null
+++ b/gui/pagedialog/PageDialog.cpp
@@ -0,0 +1,154 @@
+/* Copyright 2014 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.
+ */
+
+#include "PageDialog.h"
+#include "gui/Platform.h"
+#include <QStackedLayout>
+#include <QPushButton>
+#include <QSortFilterProxyModel>
+#include "MultiMC.h"
+#include <QStyledItemDelegate>
+#include <QListView>
+#include <QLineEdit>
+#include <QLabel>
+#include <QDialogButtonBox>
+#include <QGridLayout>
+
+#include "PageDialog_p.h"
+#include <gui/widgets/IconLabel.h>
+
+class PageEntryFilterModel : public QSortFilterProxyModel
+{
+public:
+	explicit PageEntryFilterModel(QObject *parent = 0) : QSortFilterProxyModel(parent)
+	{
+	}
+
+protected:
+	bool filterAcceptsRow(int sourceRow, const QModelIndex &sourceParent) const
+	{
+		// Regular contents check, then check page-filter.
+		if (QSortFilterProxyModel::filterAcceptsRow(sourceRow, sourceParent))
+			return true;
+
+		const QString pattern = filterRegExp().pattern();
+		const auto model = static_cast<PageModel *>(sourceModel());
+		const auto page = model->pages().at(sourceRow);
+		return page->shouldDisplay();
+	}
+};
+
+PageDialog::PageDialog(BasePageProviderPtr pageProvider, QWidget *parent) : QDialog(parent)
+{
+	MultiMCPlatform::fixWM_CLASS(this);
+	createUI();
+	setWindowTitle(pageProvider->dialogTitle());
+
+	m_model = new PageModel(this);
+	m_proxyModel = new PageEntryFilterModel(this);
+	int firstIndex = -1;
+	auto pages = pageProvider->getPages();
+	for(auto page: pages)
+	{
+		page->index = m_pageStack->addWidget(dynamic_cast<QWidget *>(page));
+		if(firstIndex == -1)
+		{
+			firstIndex = page->index;
+		}
+	}
+	m_model->setPages(pages);
+
+	m_proxyModel->setSourceModel(m_model);
+	m_proxyModel->setFilterCaseSensitivity(Qt::CaseInsensitive);
+
+	m_pageList->setIconSize(QSize(pageIconSize, pageIconSize));
+	m_pageList->setSelectionMode(QAbstractItemView::SingleSelection);
+	m_pageList->setVerticalScrollMode(QAbstractItemView::ScrollPerPixel);
+	m_pageList->setModel(m_proxyModel);
+    connect(m_pageList->selectionModel(), SIGNAL(currentRowChanged(QModelIndex,QModelIndex)),
+            this, SLOT(currentChanged(QModelIndex)));
+	
+	m_pageStack->setStackingMode(QStackedLayout::StackOne);
+	m_pageList->setFocus();
+}
+
+void PageDialog::createUI()
+{
+	m_pageStack = new QStackedLayout;
+	m_filter = new QLineEdit;
+	m_pageList = new PageView;
+	m_header = new QLabel();
+	m_iconHeader = new IconLabel(this, QIcon::fromTheme("bug"), QSize(24,24));
+
+	QFont headerLabelFont = m_header->font();
+	headerLabelFont.setBold(true);
+	const int pointSize = headerLabelFont.pointSize();
+	if (pointSize > 0)
+		headerLabelFont.setPointSize(pointSize + 2);
+	m_header->setFont(headerLabelFont);
+
+	QHBoxLayout *headerHLayout = new QHBoxLayout;
+	const int leftMargin = MMC->style()->pixelMetric(QStyle::PM_LayoutLeftMargin);
+	headerHLayout->addSpacerItem(
+		new QSpacerItem(leftMargin, 0, QSizePolicy::Fixed, QSizePolicy::Ignored));
+	headerHLayout->addWidget(m_header);
+	headerHLayout->addSpacerItem(
+		new QSpacerItem(0, 0, QSizePolicy::Expanding, QSizePolicy::Ignored));
+	headerHLayout->addWidget(m_iconHeader);
+
+	m_pageStack->setMargin(0);
+	m_pageStack->addWidget(new QWidget(this));
+
+	QDialogButtonBox *buttons = new QDialogButtonBox(
+		QDialogButtonBox::Ok | QDialogButtonBox::Apply | QDialogButtonBox::Cancel);
+	buttons->button(QDialogButtonBox::Ok)->setDefault(true);
+	connect(buttons->button(QDialogButtonBox::Apply), SIGNAL(clicked()), this, SLOT(apply()));
+	connect(buttons, SIGNAL(accepted()), this, SLOT(accept()));
+	connect(buttons, SIGNAL(rejected()), this, SLOT(reject()));
+
+	QGridLayout *mainGridLayout = new QGridLayout;
+	mainGridLayout->addLayout(headerHLayout, 0, 1, 1, 1);
+	mainGridLayout->addWidget(m_pageList, 0, 0, 2, 1);
+	mainGridLayout->addLayout(m_pageStack, 1, 1, 1, 1);
+	mainGridLayout->addWidget(buttons, 2, 0, 1, 2);
+	mainGridLayout->setColumnStretch(1, 4);
+	setLayout(mainGridLayout);
+}
+
+void PageDialog::showPage(int row)
+{
+	auto page = m_model->pages().at(row);
+	m_pageStack->setCurrentIndex(page->index);
+	m_header->setText(page->displayName());
+	m_iconHeader->setIcon(page->icon());
+}
+
+void PageDialog::currentChanged(const QModelIndex &current)
+{
+	if (current.isValid())
+	{
+		showPage(m_proxyModel->mapToSource(current).row());
+	}
+	else
+	{
+		m_pageStack->setCurrentIndex(0);
+		m_header->setText(QString());
+		m_iconHeader->setIcon(QIcon::fromTheme("bug"));
+	}
+}
+
+void PageDialog::apply()
+{
+}
diff --git a/gui/pagedialog/PageDialog.h b/gui/pagedialog/PageDialog.h
new file mode 100644
index 00000000..880b7df4
--- /dev/null
+++ b/gui/pagedialog/PageDialog.h
@@ -0,0 +1,50 @@
+/* Copyright 2014 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 <QDialog>
+#include <QModelIndex>
+#include <gui/pages/BasePageProvider.h>
+
+class IconLabel;
+class QSortFilterProxyModel;
+class PageModel;
+class QLabel;
+class QListView;
+class QLineEdit;
+class QStackedLayout;
+
+class PageDialog : public QDialog
+{
+	Q_OBJECT
+public:
+	explicit PageDialog(BasePageProviderPtr pageProvider, QWidget *parent = 0);
+	virtual ~PageDialog() {};
+private:
+	void createUI();
+private slots:
+	void apply();
+	void currentChanged(const QModelIndex &current);
+	void showPage(int row);
+
+private:
+	QSortFilterProxyModel *m_proxyModel;
+	PageModel *m_model;
+	QStackedLayout *m_pageStack;
+	QLineEdit *m_filter;
+	QListView *m_pageList;
+	QLabel *m_header;
+	IconLabel *m_iconHeader;
+};
diff --git a/gui/pagedialog/PageDialog_p.h b/gui/pagedialog/PageDialog_p.h
new file mode 100644
index 00000000..36e641e3
--- /dev/null
+++ b/gui/pagedialog/PageDialog_p.h
@@ -0,0 +1,106 @@
+#pragma once
+#include <QListView>
+#include <QStyledItemDelegate>
+#include <QEvent>
+#include <QScrollBar>
+
+const int pageIconSize = 24;
+
+class PageViewDelegate : public QStyledItemDelegate
+{
+public:
+	PageViewDelegate(QObject *parent) : QStyledItemDelegate(parent)
+	{
+	}
+	QSize sizeHint(const QStyleOptionViewItem &option, const QModelIndex &index) const
+	{
+		QSize size = QStyledItemDelegate::sizeHint(option, index);
+		size.setHeight(qMax(size.height(), 32));
+		return size;
+	}
+};
+
+class PageModel : public QAbstractListModel
+{
+public:
+	PageModel(QObject *parent = 0) : QAbstractListModel(parent)
+	{
+		QPixmap empty(pageIconSize, pageIconSize);
+		empty.fill(Qt::transparent);
+		m_emptyIcon = QIcon(empty);
+	}
+	virtual ~PageModel() {};
+
+	int rowCount(const QModelIndex &parent = QModelIndex()) const
+	{
+		return parent.isValid() ? 0 : m_pages.size();
+	}
+	QVariant data(const QModelIndex &index, int role = Qt::DisplayRole) const
+	{
+		switch (role)
+		{
+		case Qt::DisplayRole:
+			return m_pages.at(index.row())->displayName();
+		case Qt::DecorationRole:
+		{
+			QIcon icon = m_pages.at(index.row())->icon();
+			if (icon.isNull())
+				icon = m_emptyIcon;
+			return icon;
+		}
+		}
+		return QVariant();
+	}
+
+	void setPages(const QList<BasePage *> &pages)
+	{
+		beginResetModel();
+		m_pages = pages;
+		endResetModel();
+	}
+	const QList<BasePage *> &pages() const
+	{
+		return m_pages;
+	}
+
+private:
+	BasePage * findPageEntryById(QString id)
+	{
+		for(auto page: m_pages)
+		{
+			if (page->id() == id)
+				return page;
+		}
+		return nullptr;
+	}
+
+	QList<BasePage *> m_pages;
+	QIcon m_emptyIcon;
+};
+
+class PageView : public QListView
+{
+public:
+	PageView(QWidget *parent = 0) : QListView(parent)
+	{
+		setSizePolicy(QSizePolicy::MinimumExpanding, QSizePolicy::Expanding);
+		setItemDelegate(new PageViewDelegate(this));
+		setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
+	}
+
+	virtual QSize sizeHint() const
+	{
+		int width = sizeHintForColumn(0) + frameWidth() * 2 + 5;
+		if (verticalScrollBar()->isVisible())
+			width += verticalScrollBar()->width();
+		return QSize(width, 100);
+	}
+
+	virtual bool eventFilter(QObject *obj, QEvent *event)
+	{
+		if (obj == verticalScrollBar() &&
+			(event->type() == QEvent::Show || event->type() == QEvent::Hide))
+			updateGeometry();
+		return QListView::eventFilter(obj, event);
+	}
+};
diff --git a/gui/pages/BasePage.h b/gui/pages/BasePage.h
new file mode 100644
index 00000000..90e27d6f
--- /dev/null
+++ b/gui/pages/BasePage.h
@@ -0,0 +1,35 @@
+/* Copyright 2014 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 <QString>
+#include <QIcon>
+#include <memory>
+
+class BasePage
+{
+public:
+	virtual ~BasePage(){};
+	virtual QString id() = 0;
+	virtual QString displayName() = 0;
+	virtual QIcon icon() = 0;
+	virtual bool shouldDisplay()
+	{
+		return true;
+	}
+	int index = -1;
+};
+
+typedef std::shared_ptr<BasePage> BasePagePtr;
\ No newline at end of file
diff --git a/gui/pages/BasePageProvider.h b/gui/pages/BasePageProvider.h
new file mode 100644
index 00000000..cff9c8e7
--- /dev/null
+++ b/gui/pages/BasePageProvider.h
@@ -0,0 +1,28 @@
+/* Copyright 2014 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 "BasePage.h"
+#include <memory>
+
+class BasePageProvider
+{
+public:
+	virtual QList<BasePage *> getPages() = 0;
+	virtual QString dialogTitle() = 0;
+};
+
+typedef std::shared_ptr<BasePageProvider> BasePageProviderPtr;
diff --git a/gui/pages/ModFolderPage.cpp b/gui/pages/ModFolderPage.cpp
new file mode 100644
index 00000000..de51edfa
--- /dev/null
+++ b/gui/pages/ModFolderPage.cpp
@@ -0,0 +1,140 @@
+/* Copyright 2014 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.
+ */
+
+#include "MultiMC.h"
+
+#include <pathutils.h>
+#include <QFileDialog>
+#include <QMessageBox>
+#include <QDebug>
+#include <QEvent>
+#include <QKeyEvent>
+#include <QDesktopServices>
+#include <QAbstractItemModel>
+
+#include "ModFolderPage.h"
+#include "ui_ModFolderPage.h"
+
+#include "gui/dialogs/CustomMessageBox.h"
+#include "gui/dialogs/ModEditDialogCommon.h"
+
+#include "logic/ModList.h"
+#include "logic/Mod.h"
+
+QString ModFolderPage::displayName()
+{
+	return m_displayName;
+}
+
+QIcon ModFolderPage::icon()
+{
+	return QIcon::fromTheme(m_iconName);
+}
+
+QString ModFolderPage::id()
+{
+	return m_id;
+}
+
+ModFolderPage::ModFolderPage(std::shared_ptr<ModList> mods, QString id, QString iconName,
+							 QString displayName, QWidget *parent)
+	: QWidget(parent), ui(new Ui::ModFolderPage)
+{
+	ui->setupUi(this);
+	m_mods = mods;
+	m_id = id;
+	m_displayName = displayName;
+	m_iconName = iconName;
+	ui->modTreeView->setModel(m_mods.get());
+	ui->modTreeView->installEventFilter(this);
+	m_mods->startWatching();
+	auto smodel = ui->modTreeView->selectionModel();
+	connect(smodel, SIGNAL(currentChanged(QModelIndex, QModelIndex)),
+			SLOT(modCurrent(QModelIndex, QModelIndex)));
+}
+
+ModFolderPage::~ModFolderPage()
+{
+	m_mods->stopWatching();
+	delete ui;
+}
+
+bool ModFolderPage::modListFilter(QKeyEvent *keyEvent)
+{
+	switch (keyEvent->key())
+	{
+	case Qt::Key_Delete:
+		on_rmModBtn_clicked();
+		return true;
+	case Qt::Key_Plus:
+		on_addModBtn_clicked();
+		return true;
+	default:
+		break;
+	}
+	return QWidget::eventFilter(ui->modTreeView, keyEvent);
+}
+
+bool ModFolderPage::eventFilter(QObject *obj, QEvent *ev)
+{
+	if (ev->type() != QEvent::KeyPress)
+	{
+		return QWidget::eventFilter(obj, ev);
+	}
+	QKeyEvent *keyEvent = static_cast<QKeyEvent *>(ev);
+	if (obj == ui->modTreeView)
+		return modListFilter(keyEvent);
+	return QWidget::eventFilter(obj, ev);
+}
+
+void ModFolderPage::on_addModBtn_clicked()
+{
+	QStringList fileNames = QFileDialog::getOpenFileNames(
+		this, QApplication::translate("ModFolderPage", "Select Loader Mods"));
+	for (auto filename : fileNames)
+	{
+		m_mods->stopWatching();
+		m_mods->installMod(QFileInfo(filename));
+		m_mods->startWatching();
+	}
+}
+void ModFolderPage::on_rmModBtn_clicked()
+{
+	int first, last;
+	auto list = ui->modTreeView->selectionModel()->selectedRows();
+
+	if (!lastfirst(list, first, last))
+		return;
+	m_mods->stopWatching();
+	m_mods->deleteMods(first, last);
+	m_mods->startWatching();
+}
+
+void ModFolderPage::on_viewModBtn_clicked()
+{
+	openDirInDefaultProgram(m_mods->dir().absolutePath(), true);
+}
+
+void ModFolderPage::modCurrent(const QModelIndex &current, const QModelIndex &previous)
+{
+	if (!current.isValid())
+	{
+		ui->frame->clear();
+		return;
+	}
+	int row = current.row();
+	Mod &m = m_mods->operator[](row);
+	ui->frame->updateWithMod(m);
+}
diff --git a/gui/pages/ModFolderPage.h b/gui/pages/ModFolderPage.h
new file mode 100644
index 00000000..276e23d5
--- /dev/null
+++ b/gui/pages/ModFolderPage.h
@@ -0,0 +1,60 @@
+/* Copyright 2014 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 <QWidget>
+
+#include <logic/OneSixInstance.h>
+#include <logic/net/NetJob.h>
+#include "BasePage.h"
+
+class EnabledItemFilter;
+class ModList;
+namespace Ui
+{
+class ModFolderPage;
+}
+
+class ModFolderPage : public QWidget, public BasePage
+{
+	Q_OBJECT
+
+public:
+	explicit ModFolderPage(std::shared_ptr<ModList> mods, QString id, QString iconName,
+						   QString displayName, QWidget *parent = 0);
+	virtual ~ModFolderPage();
+	virtual QString displayName() override;
+	virtual QIcon icon() override;
+	virtual QString id() override;
+
+protected:
+	bool eventFilter(QObject *obj, QEvent *ev);
+	bool modListFilter(QKeyEvent *ev);
+
+private:
+	Ui::ModFolderPage *ui;
+	std::shared_ptr<ModList> m_mods;
+	QString m_iconName;
+	QString m_id;
+	QString m_displayName;
+
+public slots:
+	void modCurrent(const QModelIndex &current, const QModelIndex &previous);
+
+private slots:
+	void on_addModBtn_clicked();
+	void on_rmModBtn_clicked();
+	void on_viewModBtn_clicked();
+};
diff --git a/gui/pages/ModFolderPage.ui b/gui/pages/ModFolderPage.ui
new file mode 100644
index 00000000..05125be3
--- /dev/null
+++ b/gui/pages/ModFolderPage.ui
@@ -0,0 +1,114 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<ui version="4.0">
+ <class>ModFolderPage</class>
+ <widget class="QWidget" name="ModFolderPage">
+  <property name="geometry">
+   <rect>
+    <x>0</x>
+    <y>0</y>
+    <width>540</width>
+    <height>350</height>
+   </rect>
+  </property>
+  <property name="windowTitle">
+   <string>Mods</string>
+  </property>
+  <layout class="QHBoxLayout" name="horizontalLayout">
+   <property name="leftMargin">
+    <number>0</number>
+   </property>
+   <property name="topMargin">
+    <number>0</number>
+   </property>
+   <property name="rightMargin">
+    <number>0</number>
+   </property>
+   <property name="bottomMargin">
+    <number>0</number>
+   </property>
+   <item>
+    <layout class="QVBoxLayout" name="verticalLayout">
+     <item>
+      <widget class="ModListView" name="modTreeView">
+       <property name="sizePolicy">
+        <sizepolicy hsizetype="Expanding" vsizetype="Expanding">
+         <horstretch>0</horstretch>
+         <verstretch>0</verstretch>
+        </sizepolicy>
+       </property>
+       <property name="acceptDrops">
+        <bool>true</bool>
+       </property>
+       <property name="dragDropMode">
+        <enum>QAbstractItemView::DropOnly</enum>
+       </property>
+      </widget>
+     </item>
+     <item>
+      <widget class="MCModInfoFrame" name="frame">
+       <property name="sizePolicy">
+        <sizepolicy hsizetype="Preferred" vsizetype="Minimum">
+         <horstretch>0</horstretch>
+         <verstretch>0</verstretch>
+        </sizepolicy>
+       </property>
+      </widget>
+     </item>
+    </layout>
+   </item>
+   <item>
+    <layout class="QVBoxLayout" name="verticalLayout_2">
+     <item>
+      <widget class="QPushButton" name="addModBtn">
+       <property name="text">
+        <string>&amp;Add</string>
+       </property>
+      </widget>
+     </item>
+     <item>
+      <widget class="QPushButton" name="rmModBtn">
+       <property name="text">
+        <string>&amp;Remove</string>
+       </property>
+      </widget>
+     </item>
+     <item>
+      <spacer name="verticalSpacer">
+       <property name="orientation">
+        <enum>Qt::Vertical</enum>
+       </property>
+       <property name="sizeHint" stdset="0">
+        <size>
+         <width>20</width>
+         <height>40</height>
+        </size>
+       </property>
+      </spacer>
+     </item>
+     <item>
+      <widget class="QPushButton" name="viewModBtn">
+       <property name="text">
+        <string>&amp;View Folder</string>
+       </property>
+      </widget>
+     </item>
+    </layout>
+   </item>
+  </layout>
+ </widget>
+ <customwidgets>
+  <customwidget>
+   <class>ModListView</class>
+   <extends>QTreeView</extends>
+   <header>gui/widgets/ModListView.h</header>
+  </customwidget>
+  <customwidget>
+   <class>MCModInfoFrame</class>
+   <extends>QFrame</extends>
+   <header>gui/widgets/MCModInfoFrame.h</header>
+   <container>1</container>
+  </customwidget>
+ </customwidgets>
+ <resources/>
+ <connections/>
+</ui>
diff --git a/gui/pages/VersionPage.cpp b/gui/pages/VersionPage.cpp
new file mode 100644
index 00000000..34b959e0
--- /dev/null
+++ b/gui/pages/VersionPage.cpp
@@ -0,0 +1,365 @@
+/* Copyright 2014 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.
+ */
+
+#include "MultiMC.h"
+
+#include <pathutils.h>
+#include <QFileDialog>
+#include <QMessageBox>
+#include <QDebug>
+#include <QEvent>
+#include <QKeyEvent>
+
+#include "VersionPage.h"
+#include "ui_VersionPage.h"
+
+#include "gui/Platform.h"
+#include "gui/dialogs/CustomMessageBox.h"
+#include "gui/dialogs/VersionSelectDialog.h"
+#include "gui/dialogs/ModEditDialogCommon.h"
+
+#include "gui/dialogs/ProgressDialog.h"
+
+#include "logic/ModList.h"
+#include "logic/minecraft/InstanceVersion.h"
+#include "logic/EnabledItemFilter.h"
+#include "logic/forge/ForgeVersionList.h"
+#include "logic/forge/ForgeInstaller.h"
+#include "logic/liteloader/LiteLoaderVersionList.h"
+#include "logic/liteloader/LiteLoaderInstaller.h"
+#include "logic/minecraft/VersionBuilder.h"
+#include "logic/auth/MojangAccountList.h"
+
+#include <QAbstractItemModel>
+#include <logic/Mod.h>
+
+#include <QMessageBox>
+#include <QListView>
+#include <QString>
+#include <QUrl>
+
+QString VersionPage::displayName()
+{
+	return tr("Version");
+}
+
+QIcon VersionPage::icon()
+{
+	return QIcon::fromTheme("settings");
+}
+
+QString VersionPage::id()
+{
+	return "version";
+}
+
+VersionPage::VersionPage(OneSixInstance *inst, QWidget *parent)
+	: QWidget(parent), ui(new Ui::VersionPage), m_inst(inst)
+{
+	ui->setupUi(this);
+	// libraries!
+
+	m_version = m_inst->getFullVersion();
+	if (m_version)
+	{
+		main_model = new EnabledItemFilter(this);
+		main_model->setActive(true);
+		main_model->setSourceModel(m_version.get());
+		ui->libraryTreeView->setModel(main_model);
+		ui->libraryTreeView->installEventFilter(this);
+		connect(ui->libraryTreeView->selectionModel(), &QItemSelectionModel::currentChanged,
+				this, &VersionPage::versionCurrent);
+		updateVersionControls();
+	}
+	else
+	{
+		disableVersionControls();
+	}
+	connect(m_inst, &OneSixInstance::versionReloaded, this,
+			&VersionPage::updateVersionControls);
+}
+
+VersionPage::~VersionPage()
+{
+	delete ui;
+}
+
+void VersionPage::updateVersionControls()
+{
+	ui->forgeBtn->setEnabled(true);
+	ui->liteloaderBtn->setEnabled(true);
+}
+
+void VersionPage::disableVersionControls()
+{
+	ui->forgeBtn->setEnabled(false);
+	ui->liteloaderBtn->setEnabled(false);
+	ui->reloadLibrariesBtn->setEnabled(false);
+	ui->removeLibraryBtn->setEnabled(false);
+}
+
+bool VersionPage::reloadInstanceVersion()
+{
+	try
+	{
+		m_inst->reloadVersion();
+		return true;
+	}
+	catch (MMCError &e)
+	{
+		QMessageBox::critical(this, tr("Error"), e.cause());
+		return false;
+	}
+	catch (...)
+	{
+		QMessageBox::critical(
+			this, tr("Error"),
+			tr("Failed to load the version description file for reasons unknown."));
+		return false;
+	}
+}
+
+void VersionPage::on_reloadLibrariesBtn_clicked()
+{
+	reloadInstanceVersion();
+}
+
+void VersionPage::on_removeLibraryBtn_clicked()
+{
+	if (ui->libraryTreeView->currentIndex().isValid())
+	{
+		// FIXME: use actual model, not reloading.
+		if (!m_version->remove(ui->libraryTreeView->currentIndex().row()))
+		{
+			QMessageBox::critical(this, tr("Error"), tr("Couldn't remove file"));
+		}
+	}
+}
+
+void VersionPage::on_jarmodBtn_clicked()
+{
+	QFileDialog w;
+	QSet<QString> locations;
+	QString modsFolder = MMC->settings()->get("CentralModsDir").toString();
+	auto f = [&](QStandardPaths::StandardLocation l)
+	{
+		QString location = QStandardPaths::writableLocation(l);
+		if(!QFileInfo::exists(location))
+			return;
+		locations.insert(location);
+	};
+	f(QStandardPaths::DesktopLocation);
+	f(QStandardPaths::DocumentsLocation);
+	f(QStandardPaths::DownloadLocation);
+	f(QStandardPaths::HomeLocation);
+	QList<QUrl> urls;
+	for(auto location: locations)
+	{
+		urls.append(QUrl::fromLocalFile(location));
+	}
+	urls.append(QUrl::fromLocalFile(modsFolder));
+
+	w.setFileMode(QFileDialog::ExistingFiles);
+	w.setAcceptMode(QFileDialog::AcceptOpen);
+	w.setNameFilter(tr("Minecraft jar mods (*.zip *.jar)"));
+	w.setDirectory(modsFolder);
+	w.setSidebarUrls(urls);
+
+	if(w.exec());
+		m_version->installJarMods(w.selectedFiles());
+}
+
+void VersionPage::on_resetLibraryOrderBtn_clicked()
+{
+	try
+	{
+		m_version->resetOrder();
+	}
+	catch (MMCError &e)
+	{
+		QMessageBox::critical(this, tr("Error"), e.cause());
+	}
+}
+
+void VersionPage::on_moveLibraryUpBtn_clicked()
+{
+	if (ui->libraryTreeView->selectionModel()->selectedRows().isEmpty())
+	{
+		return;
+	}
+	try
+	{
+		const int row = ui->libraryTreeView->selectionModel()->selectedRows().first().row();
+		const int newRow = 0;
+		m_version->move(row, InstanceVersion::MoveUp);
+		// ui->libraryTreeView->selectionModel()->setCurrentIndex(m_version->index(newRow),
+		// QItemSelectionModel::ClearAndSelect);
+	}
+	catch (MMCError &e)
+	{
+		QMessageBox::critical(this, tr("Error"), e.cause());
+	}
+}
+
+void VersionPage::on_moveLibraryDownBtn_clicked()
+{
+	if (ui->libraryTreeView->selectionModel()->selectedRows().isEmpty())
+	{
+		return;
+	}
+	try
+	{
+		const int row = ui->libraryTreeView->selectionModel()->selectedRows().first().row();
+		const int newRow = 0;
+		m_version->move(row, InstanceVersion::MoveDown);
+		// ui->libraryTreeView->selectionModel()->setCurrentIndex(m_version->index(newRow),
+		// QItemSelectionModel::ClearAndSelect);
+	}
+	catch (MMCError &e)
+	{
+		QMessageBox::critical(this, tr("Error"), e.cause());
+	}
+}
+
+void VersionPage::on_changeMCVersionBtn_clicked()
+{
+	VersionSelectDialog vselect(m_inst->versionList().get(), tr("Change Minecraft version"),
+								this);
+	if (!vselect.exec() || !vselect.selectedVersion())
+		return;
+
+	if (!MMC->accounts()->anyAccountIsValid())
+	{
+		CustomMessageBox::selectable(
+			this, tr("Error"),
+			tr("MultiMC cannot download Minecraft or update instances unless you have at least "
+			   "one account added.\nPlease add your Mojang or Minecraft account."),
+			QMessageBox::Warning)->show();
+		return;
+	}
+
+	if (m_inst->versionIsCustom())
+	{
+		auto result = CustomMessageBox::selectable(
+			this, tr("Are you sure?"),
+			tr("This will remove any library/version customization you did previously. "
+			   "This includes things like Forge install and similar."),
+			QMessageBox::Warning, QMessageBox::Ok | QMessageBox::Abort,
+			QMessageBox::Abort)->exec();
+
+		if (result != QMessageBox::Ok)
+			return;
+		m_version->revertToVanilla();
+		reloadInstanceVersion();
+	}
+	m_inst->setIntendedVersionId(vselect.selectedVersion()->descriptor());
+
+	auto updateTask = m_inst->doUpdate();
+	if (!updateTask)
+	{
+		return;
+	}
+	ProgressDialog tDialog(this);
+	connect(updateTask.get(), SIGNAL(failed(QString)), SLOT(onGameUpdateError(QString)));
+	tDialog.exec(updateTask.get());
+}
+
+void VersionPage::on_forgeBtn_clicked()
+{
+	// FIXME: use actual model, not reloading. Move logic to model.
+	if (m_version->hasFtbPack())
+	{
+		if (QMessageBox::question(
+				this, tr("Revert?"),
+				tr("This action will remove the FTB pack version patch. Continue?")) !=
+			QMessageBox::Yes)
+		{
+			return;
+		}
+		m_version->removeFtbPack();
+		reloadInstanceVersion();
+	}
+	if (m_version->usesLegacyCustomJson())
+	{
+		if (QMessageBox::question(this, tr("Revert?"),
+								  tr("This action will remove your custom.json. Continue?")) !=
+			QMessageBox::Yes)
+		{
+			return;
+		}
+		m_version->revertToVanilla();
+		reloadInstanceVersion();
+	}
+	VersionSelectDialog vselect(MMC->forgelist().get(), tr("Select Forge version"), this);
+	vselect.setExactFilter(1, m_inst->currentVersionId());
+	vselect.setEmptyString(tr("No Forge versions are currently available for Minecraft ") +
+						   m_inst->currentVersionId());
+	if (vselect.exec() && vselect.selectedVersion())
+	{
+		ProgressDialog dialog(this);
+		dialog.exec(
+			ForgeInstaller().createInstallTask(m_inst, vselect.selectedVersion(), this));
+	}
+}
+
+void VersionPage::on_liteloaderBtn_clicked()
+{
+	if (m_version->hasFtbPack())
+	{
+		if (QMessageBox::question(
+				this, tr("Revert?"),
+				tr("This action will remove the FTB pack version patch. Continue?")) !=
+			QMessageBox::Yes)
+		{
+			return;
+		}
+		m_version->removeFtbPack();
+		reloadInstanceVersion();
+	}
+	if (m_version->usesLegacyCustomJson())
+	{
+		if (QMessageBox::question(this, tr("Revert?"),
+								  tr("This action will remove your custom.json. Continue?")) !=
+			QMessageBox::Yes)
+		{
+			return;
+		}
+		m_version->revertToVanilla();
+		reloadInstanceVersion();
+	}
+	VersionSelectDialog vselect(MMC->liteloaderlist().get(), tr("Select LiteLoader version"),
+								this);
+	vselect.setExactFilter(1, m_inst->currentVersionId());
+	vselect.setEmptyString(tr("No LiteLoader versions are currently available for Minecraft ") +
+						   m_inst->currentVersionId());
+	if (vselect.exec() && vselect.selectedVersion())
+	{
+		ProgressDialog dialog(this);
+		dialog.exec(
+			LiteLoaderInstaller().createInstallTask(m_inst, vselect.selectedVersion(), this));
+	}
+}
+
+void VersionPage::versionCurrent(const QModelIndex &current, const QModelIndex &previous)
+{
+	if (!current.isValid())
+	{
+		ui->removeLibraryBtn->setDisabled(true);
+	}
+	else
+	{
+		ui->removeLibraryBtn->setEnabled(m_version->canRemove(current.row()));
+	}
+}
diff --git a/gui/pages/VersionPage.h b/gui/pages/VersionPage.h
new file mode 100644
index 00000000..55e244b3
--- /dev/null
+++ b/gui/pages/VersionPage.h
@@ -0,0 +1,70 @@
+/* Copyright 2014 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 <QWidget>
+
+#include <logic/OneSixInstance.h>
+#include <logic/net/NetJob.h>
+#include "BasePage.h"
+
+class EnabledItemFilter;
+namespace Ui
+{
+class VersionPage;
+}
+
+class VersionPage : public QWidget, public BasePage
+{
+	Q_OBJECT
+
+public:
+	explicit VersionPage(OneSixInstance *inst, QWidget *parent = 0);
+	virtual ~VersionPage();
+	virtual QString displayName() override;
+	virtual QIcon icon() override;
+	virtual QString id() override;
+private
+slots:
+
+	// version tab
+	void on_forgeBtn_clicked();
+	void on_liteloaderBtn_clicked();
+	void on_reloadLibrariesBtn_clicked();
+	void on_removeLibraryBtn_clicked();
+	void on_resetLibraryOrderBtn_clicked();
+	void on_moveLibraryUpBtn_clicked();
+	void on_moveLibraryDownBtn_clicked();
+	void on_jarmodBtn_clicked();
+
+	void updateVersionControls();
+	void disableVersionControls();
+	void on_changeMCVersionBtn_clicked();
+
+protected:
+	/// FIXME: this shouldn't be necessary!
+	bool reloadInstanceVersion();
+
+private:
+	Ui::VersionPage *ui;
+	std::shared_ptr<InstanceVersion> m_version;
+	EnabledItemFilter *main_model;
+	OneSixInstance *m_inst;
+	NetJobPtr forgeJob;
+
+public
+slots:
+	void versionCurrent(const QModelIndex &current, const QModelIndex &previous);
+};
diff --git a/gui/pages/VersionPage.ui b/gui/pages/VersionPage.ui
new file mode 100644
index 00000000..036295f0
--- /dev/null
+++ b/gui/pages/VersionPage.ui
@@ -0,0 +1,169 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<ui version="4.0">
+ <class>VersionPage</class>
+ <widget class="QWidget" name="VersionPage">
+  <property name="geometry">
+   <rect>
+    <x>0</x>
+    <y>0</y>
+    <width>400</width>
+    <height>326</height>
+   </rect>
+  </property>
+  <property name="windowTitle">
+   <string>Version</string>
+  </property>
+  <layout class="QHBoxLayout" name="horizontalLayout">
+   <property name="spacing">
+    <number>6</number>
+   </property>
+   <property name="leftMargin">
+    <number>0</number>
+   </property>
+   <property name="topMargin">
+    <number>0</number>
+   </property>
+   <property name="rightMargin">
+    <number>0</number>
+   </property>
+   <property name="bottomMargin">
+    <number>0</number>
+   </property>
+   <item>
+    <layout class="QVBoxLayout" name="verticalLayout_10">
+     <item>
+      <widget class="ModListView" name="libraryTreeView">
+       <property name="verticalScrollBarPolicy">
+        <enum>Qt::ScrollBarAlwaysOn</enum>
+       </property>
+       <property name="horizontalScrollBarPolicy">
+        <enum>Qt::ScrollBarAlwaysOff</enum>
+       </property>
+       <property name="headerHidden">
+        <bool>false</bool>
+       </property>
+       <attribute name="headerVisible">
+        <bool>true</bool>
+       </attribute>
+      </widget>
+     </item>
+    </layout>
+   </item>
+   <item>
+    <layout class="QVBoxLayout" name="verticalLayout_4">
+     <item>
+      <widget class="QPushButton" name="changeMCVersionBtn">
+       <property name="text">
+        <string>Change version</string>
+       </property>
+      </widget>
+     </item>
+     <item>
+      <widget class="QPushButton" name="forgeBtn">
+       <property name="toolTip">
+        <string>Replace any current custom version with Minecraft Forge</string>
+       </property>
+       <property name="text">
+        <string>Install Forge</string>
+       </property>
+      </widget>
+     </item>
+     <item>
+      <widget class="QPushButton" name="liteloaderBtn">
+       <property name="text">
+        <string>Install LiteLoader</string>
+       </property>
+      </widget>
+     </item>
+     <item>
+      <widget class="QPushButton" name="jarmodBtn">
+       <property name="text">
+        <string>Add jar mod</string>
+       </property>
+      </widget>
+     </item>
+     <item>
+      <widget class="Line" name="line">
+       <property name="orientation">
+        <enum>Qt::Horizontal</enum>
+       </property>
+      </widget>
+     </item>
+     <item>
+      <widget class="QPushButton" name="reloadLibrariesBtn">
+       <property name="text">
+        <string>Reload</string>
+       </property>
+      </widget>
+     </item>
+     <item>
+      <widget class="QPushButton" name="removeLibraryBtn">
+       <property name="text">
+        <string>Remove</string>
+       </property>
+      </widget>
+     </item>
+     <item>
+      <widget class="Line" name="line_2">
+       <property name="orientation">
+        <enum>Qt::Horizontal</enum>
+       </property>
+      </widget>
+     </item>
+     <item>
+      <widget class="QPushButton" name="moveLibraryUpBtn">
+       <property name="toolTip">
+        <string>This isn't implemented yet.</string>
+       </property>
+       <property name="text">
+        <string>Move up</string>
+       </property>
+      </widget>
+     </item>
+     <item>
+      <widget class="QPushButton" name="moveLibraryDownBtn">
+       <property name="toolTip">
+        <string>This isn't implemented yet.</string>
+       </property>
+       <property name="text">
+        <string>Move down</string>
+       </property>
+      </widget>
+     </item>
+     <item>
+      <widget class="QPushButton" name="resetLibraryOrderBtn">
+       <property name="toolTip">
+        <string>This isn't implemented yet.</string>
+       </property>
+       <property name="text">
+        <string>Reset order</string>
+       </property>
+      </widget>
+     </item>
+     <item>
+      <spacer name="verticalSpacer_7">
+       <property name="orientation">
+        <enum>Qt::Vertical</enum>
+       </property>
+       <property name="sizeHint" stdset="0">
+        <size>
+         <width>20</width>
+         <height>40</height>
+        </size>
+       </property>
+      </spacer>
+     </item>
+    </layout>
+   </item>
+  </layout>
+ </widget>
+ <customwidgets>
+  <customwidget>
+   <class>ModListView</class>
+   <extends>QTreeView</extends>
+   <header>gui/widgets/ModListView.h</header>
+  </customwidget>
+ </customwidgets>
+ <resources/>
+ <connections/>
+</ui>