68 lines
1.5 KiB
C++
68 lines
1.5 KiB
C++
/*
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* Copyright 2006, Haiku Inc.
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* Distributed under the terms of the MIT License.
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*/
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#ifndef _LAYOUT_H
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#define _LAYOUT_H
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#include <Alignment.h>
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#include <List.h>
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#include <Size.h>
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class BLayoutItem;
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class BView;
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class BLayout {
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public:
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BLayout();
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virtual ~BLayout();
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BView* View() const;
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virtual BLayoutItem* AddView(BView* child);
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virtual BLayoutItem* AddView(int32 index, BView* child);
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virtual bool AddItem(BLayoutItem* item);
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virtual bool AddItem(int32 index, BLayoutItem* item);
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virtual bool RemoveView(BView* child);
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virtual bool RemoveItem(BLayoutItem* item);
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virtual BLayoutItem* RemoveItem(int32 index);
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BLayoutItem* ItemAt(int32 index) const;
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int32 CountItems() const;
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int32 IndexOfItem(BLayoutItem* item) const;
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int32 IndexOfView(BView* child) const;
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virtual BSize MinSize() = 0;
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virtual BSize MaxSize() = 0;
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virtual BSize PreferredSize() = 0;
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virtual BAlignment Alignment() = 0;
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virtual bool HasHeightForWidth() = 0;
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virtual void GetHeightForWidth(float width, float* min,
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float* max, float* preferred) = 0;
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virtual void InvalidateLayout();
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virtual void LayoutView() = 0;
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protected:
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// TODO: Since memory allocations can fail, we should return a bool and
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// undo the addition, if false.
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virtual void ItemAdded(BLayoutItem* item);
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virtual void ItemRemoved(BLayoutItem* item);
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private:
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friend class BView;
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void SetView(BView* view);
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BView* fView;
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BList fItems;
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};
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#endif // _LAYOUT_H
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