94 lines
2.2 KiB
C++
94 lines
2.2 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 _TWO_DIMENSIONAL_LAYOUT_H
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#define _TWO_DIMENSIONAL_LAYOUT_H
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#include <Layout.h>
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class BLayoutContext;
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class BTwoDimensionalLayout : public BLayout {
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public:
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BTwoDimensionalLayout();
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virtual ~BTwoDimensionalLayout();
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void SetInsets(float left, float top, float right,
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float bottom);
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void GetInsets(float* left, float* top, float* right,
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float* bottom);
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void AlignLayoutWith(BTwoDimensionalLayout* other,
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enum orientation orientation);
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virtual BSize MinSize();
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virtual BSize MaxSize();
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virtual BSize PreferredSize();
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virtual BAlignment Alignment();
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virtual bool HasHeightForWidth();
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virtual void GetHeightForWidth(float width, float* min,
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float* max, float* preferred);
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virtual void InvalidateLayout();
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virtual void LayoutView();
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protected:
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struct ColumnRowConstraints {
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float weight;
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float min;
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float max;
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};
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struct Dimensions {
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int32 x;
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int32 y;
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int32 width;
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int32 height;
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};
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BSize AddInsets(BSize size);
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void AddInsets(float* minHeight, float* maxHeight,
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float* preferredHeight);
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BSize SubtractInsets(BSize size);
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virtual void PrepareItems(enum orientation orientation);
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virtual bool HasMultiColumnItems();
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virtual bool HasMultiRowItems();
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virtual int32 InternalCountColumns() = 0;
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virtual int32 InternalCountRows() = 0;
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virtual void GetColumnRowConstraints(
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enum orientation orientation,
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int32 index,
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ColumnRowConstraints* constraints) = 0;
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virtual void GetItemDimensions(BLayoutItem* item,
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Dimensions* dimensions) = 0;
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private:
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class CompoundLayouter;
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class LocalLayouter;
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class VerticalCompoundLayouter;
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friend class LocalLayouter;
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void _ValidateMinMax();
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BLayoutContext* _CurrentLayoutContext();
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protected:
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float fLeftInset;
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float fRightInset;
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float fTopInset;
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float fBottomInset;
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float fHSpacing;
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float fVSpacing;
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private:
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LocalLayouter* fLocalLayouter;
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};
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#endif // _TWO_DIMENSIONAL_LAYOUT_H
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