haiku/headers/os/interface/TwoDimensionalLayout.h

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/*
* Copyright 2006, Haiku Inc.
* Distributed under the terms of the MIT License.
*/
#ifndef _TWO_DIMENSIONAL_LAYOUT_H
#define _TWO_DIMENSIONAL_LAYOUT_H
#include <Layout.h>
class BLayoutContext;
class BTwoDimensionalLayout : public BLayout {
public:
BTwoDimensionalLayout();
virtual ~BTwoDimensionalLayout();
void SetInsets(float left, float top, float right,
float bottom);
void GetInsets(float* left, float* top, float* right,
float* bottom);
void AlignLayoutWith(BTwoDimensionalLayout* other,
enum orientation orientation);
virtual BSize MinSize();
virtual BSize MaxSize();
virtual BSize PreferredSize();
virtual BAlignment Alignment();
virtual bool HasHeightForWidth();
virtual void GetHeightForWidth(float width, float* min,
float* max, float* preferred);
virtual void InvalidateLayout();
virtual void LayoutView();
protected:
struct ColumnRowConstraints {
float weight;
float min;
float max;
};
struct Dimensions {
int32 x;
int32 y;
int32 width;
int32 height;
};
BSize AddInsets(BSize size);
void AddInsets(float* minHeight, float* maxHeight,
float* preferredHeight);
BSize SubtractInsets(BSize size);
virtual void PrepareItems(enum orientation orientation);
virtual bool HasMultiColumnItems();
virtual bool HasMultiRowItems();
virtual int32 InternalCountColumns() = 0;
virtual int32 InternalCountRows() = 0;
virtual void GetColumnRowConstraints(
enum orientation orientation,
int32 index,
ColumnRowConstraints* constraints) = 0;
virtual void GetItemDimensions(BLayoutItem* item,
Dimensions* dimensions) = 0;
private:
class CompoundLayouter;
class LocalLayouter;
class VerticalCompoundLayouter;
friend class LocalLayouter;
void _ValidateMinMax();
BLayoutContext* _CurrentLayoutContext();
protected:
float fLeftInset;
float fRightInset;
float fTopInset;
float fBottomInset;
float fHSpacing;
float fVSpacing;
private:
LocalLayouter* fLocalLayouter;
};
#endif // _TWO_DIMENSIONAL_LAYOUT_H