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+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/***************************************************************************
+ * layout.h
+ *
+ * Sat Mar 21 15:12:36 CET 2015
+ * Copyright 2015 Bent Bisballe Nyeng
+ * deva@aasimon.org
+ ****************************************************************************/
+
+/*
+ * This file is part of DrumGizmo.
+ *
+ * DrumGizmo 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.
+ *
+ * DrumGizmo 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 DrumGizmo; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
+ */
+#pragma once
+
+#include <list>
+#include <cstdlib>
+
+#include "notifier.h"
+
+namespace GUI {
+
+class Layout;
+
+class LayoutItem {
+public:
+ LayoutItem();
+ virtual ~LayoutItem();
+
+ void setLayoutParent(Layout* parent);
+
+ virtual void resize(int width, int height) = 0;
+ virtual void move(size_t x, size_t y) = 0;
+ virtual int x() = 0;
+ virtual int y() = 0;
+ virtual size_t width() = 0;
+ virtual size_t height() = 0;
+
+private:
+ Layout* parent;
+};
+
+//! \brief Abtract Layout class.
+class Layout : public Listener
+{
+public:
+ Layout(LayoutItem *parent);
+ virtual ~Layout() {}
+
+ virtual void addItem(LayoutItem *item);
+ virtual void removeItem(LayoutItem *item);
+
+ //! \brief Reimplement this method to create a new Layout rule.
+ virtual void layout() = 0;
+
+protected:
+ void sizeChanged(int width, int height);
+
+ LayoutItem *parent;
+ typedef std::list<LayoutItem *> LayoutItemList;
+ LayoutItemList items;
+};
+
+//! \brief Abstract box layout
+class BoxLayout : public Layout {
+public:
+ BoxLayout(LayoutItem *parent);
+
+ //! \brief Set to false to only move the items, not scale them.
+ void setResizeChildren(bool resize_children);
+
+ void setSpacing(size_t spacing);
+
+ // From Layout:
+ virtual void layout() override = 0;
+
+protected:
+ bool resizeChildren{false};
+ size_t spacing{0};
+};
+
+enum class HAlignment {
+ left,
+ center,
+ right,
+};
+
+//! \brief A Layout that lays out its elements vertically.
+class VBoxLayout : public BoxLayout {
+public:
+ VBoxLayout(LayoutItem *parent);
+
+ void setHAlignment(HAlignment alignment);
+
+ // From BoxLayout:
+ virtual void layout() override;
+
+protected:
+ HAlignment align;
+};
+
+enum class VAlignment {
+ top,
+ center,
+ bottom,
+};
+
+//! \brief A Layout that lays out its elements vertically.
+class HBoxLayout : public BoxLayout {
+public:
+ HBoxLayout(LayoutItem *parent);
+
+ void setVAlignment(VAlignment alignment);
+
+ // From BoxLayout:
+ virtual void layout() override;
+
+protected:
+ VAlignment align;
+};
+
+} // GUI::