haiku/headers/os/interface/GridLayout.h

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/*
* Copyright 2006, Haiku Inc.
* Distributed under the terms of the MIT License.
*/
#ifndef _GRID_LAYOUT_H
#define _GRID_LAYOUT_H
#include <TwoDimensionalLayout.h>
class BGridLayout : public BTwoDimensionalLayout {
public:
BGridLayout(float horizontal = 0.0f,
float vertical = 0.0f);
virtual ~BGridLayout();
int32 CountColumns() const;
int32 CountRows() const;
float HorizontalSpacing() const;
float VerticalSpacing() const;
void SetHorizontalSpacing(float spacing);
void SetVerticalSpacing(float spacing);
void SetSpacing(float horizontal, float vertical);
float ColumnWeight(int32 column) const;
void SetColumnWeight(int32 column, float weight);
float MinColumnWidth(int32 column) const;
void SetMinColumnWidth(int32 column, float width);
float MaxColumnWidth(int32 column) const;
void SetMaxColumnWidth(int32 column, float width);
float RowWeight(int32 row) const;
void SetRowWeight(int32 row, float weight);
float MinRowHeight(int row) const;
void SetMinRowHeight(int32 row, float height);
float MaxRowHeight(int32 row) const;
void SetMaxRowHeight(int32 row, float height);
virtual BLayoutItem* AddView(BView* child);
virtual BLayoutItem* AddView(int32 index, BView* child);
virtual BLayoutItem* AddView(BView* child, int32 column, int32 row,
int32 columnCount = 1, int32 rowCount = 1);
virtual bool AddItem(BLayoutItem* item);
virtual bool AddItem(int32 index, BLayoutItem* item);
virtual bool AddItem(BLayoutItem* item, int32 column,
int32 row, int32 columnCount = 1,
int32 rowCount = 1);
protected:
virtual void ItemAdded(BLayoutItem* item);
virtual void ItemRemoved(BLayoutItem* item);
virtual bool HasMultiColumnItems();
virtual bool HasMultiRowItems();
virtual int32 InternalCountColumns();
virtual int32 InternalCountRows();
virtual void GetColumnRowConstraints(
enum orientation orientation,
int32 index,
ColumnRowConstraints* constraints);
virtual void GetItemDimensions(BLayoutItem* item,
Dimensions* dimensions);
private:
class DummyLayoutItem;
class RowInfoArray;
struct ItemLayoutData;
bool _IsGridCellEmpty(int32 column, int32 row);
bool _AreGridCellsEmpty(int32 column, int32 row,
int32 columnCount, int32 rowCount);
bool _ResizeGrid(int32 columnCount, int32 rowCount);
ItemLayoutData* _LayoutDataForItem(BLayoutItem* item) const;
private:
BLayoutItem*** fGrid;
int32 fColumnCount;
int32 fRowCount;
RowInfoArray* fRowInfos;
RowInfoArray* fColumnInfos;
int32 fMultiColumnItems;
int32 fMultiRowItems;
};
#endif // _GRID_LAYOUT_H