1 // Align items horizontally or vertically in a box
3 // Copyright (C) 2014 Thomas Geymayer <tomgey@gmail.com>
5 // This library is free software; you can redistribute it and/or
6 // modify it under the terms of the GNU Library General Public
7 // License as published by the Free Software Foundation; either
8 // version 2 of the License, or (at your option) any later version.
10 // This library is distributed in the hope that it will be useful,
11 // but WITHOUT ANY WARRANTY; without even the implied warranty of
12 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 // Library General Public License for more details.
15 // You should have received a copy of the GNU Library General Public
16 // License along with this library; if not, write to the Free Software
17 // Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
19 #ifndef SG_CANVAS_BOX_LAYOUT_HXX_
20 #define SG_CANVAS_BOX_LAYOUT_HXX_
42 BoxLayout(Direction dir);
45 virtual void addItem(const LayoutItemRef& item);
47 void addItem(const LayoutItemRef& item, int stretch);
49 void addStretch(int stretch = 0);
51 void addSpacing(int size);
53 void insertItem(int index, const LayoutItemRef& item, int stretch = 0);
55 void insertStretch(int index, int stretch = 0);
57 void insertSpacing(int index, int size);
59 virtual size_t count() const;
60 virtual LayoutItemRef itemAt(size_t index);
61 virtual LayoutItemRef takeAt(size_t index);
65 * Set the stretch factor of the item at position @a index to @a stretch.
67 void setStretch(size_t index, int stretch);
70 * Set the stretch factor of the given @a item to @a stretch, if it exists
73 * @return true, if the @a item was found in the layout
75 bool setStretchFactor(const LayoutItemRef& item, int stretch);
78 * Get the stretch factor of the item at position @a index
80 int stretch(size_t index) const;
82 virtual void setSpacing(int spacing);
83 virtual int spacing() const;
85 void setDirection(Direction dir);
86 Direction direction() const;
88 virtual bool hasHeightForWidth() const;
89 virtual int heightForWidth(int w) const;
90 virtual int minimumHeightForWidth(int w) const;
92 virtual void setCanvas(const CanvasWeakPtr& canvas);
98 typedef const int& (SGVec2i::*CoordGetter)() const;
99 CoordGetter _get_layout_coord, //<! getter for coordinate in layout
101 _get_fixed_coord; //<! getter for coordinate in secondary
105 Direction _direction;
107 typedef std::vector<ItemData> LayoutItems;
109 mutable LayoutItems _layout_items;
110 mutable ItemData _layout_data;
112 // Cache for last height-for-width query
113 mutable int _hfw_width,
117 void updateSizeHints() const;
118 void updateWFHCache(int w) const;
120 virtual SGVec2i sizeHintImpl() const;
121 virtual SGVec2i minimumSizeImpl() const;
122 virtual SGVec2i maximumSizeImpl() const;
124 virtual void doLayout(const SGRecti& geom);
128 * Shortcut for creating a horizontal box layout
138 * Shortcut for creating a vertical box layout
147 typedef SGSharedPtr<BoxLayout> BoxLayoutRef;
149 } // namespace canvas
150 } // namespace simgear
153 #endif /* SG_CANVAS_BOX_LAYOUT_HXX_ */