xref: /haiku/headers/libs/alm/ALMLayoutBuilder.h (revision a25ffa4f046fb495c316d29f0645bd00c82751c8)

/*
 * Copyright 2012, Haiku, Inc. All rights reserved.
 * Distributed under the terms of the MIT License.
 */
#ifndef	ALM_LAYOUT_BUILDER_H
#define	ALM_LAYOUT_BUILDER_H


#include "ALMLayout.h"


class BLayoutItem;
class BView;
class BWindow;


namespace BALM {


class BALMLayoutBuilder {
public:
								BALMLayoutBuilder(BView* view, float hSpacing,
									float vSpacing,
									BALMLayout* friendLayout = NULL);
								BALMLayoutBuilder(BView* view,
									BALMLayout* layout);
								BALMLayoutBuilder(BWindow* window,
									float hSpacing, float vSpacing,
									BALMLayout* friendLayout = NULL);
								BALMLayoutBuilder(BWindow* window,
									BALMLayout* layout);
								BALMLayoutBuilder(BALMLayout* layout);

	BALMLayoutBuilder&			Add(BView* view, XTab* left, YTab* top,
									XTab* right = NULL, YTab* bottom = NULL);
	BALMLayoutBuilder&			Add(BView* view, Row* row, Column* column);

	BALMLayoutBuilder&			Add(BLayoutItem* item, XTab* left,
									YTab* top, XTab* right = NULL,
									YTab* bottom = NULL);
	BALMLayoutBuilder&			Add(BLayoutItem* item, Row* row,
									Column* column);

	BALMLayoutBuilder&			SetInsets(float insets);
	BALMLayoutBuilder&			SetInsets(float horizontal, float vertical);
	BALMLayoutBuilder&			SetInsets(float left, float top, float right,
									float bottom);

	BALMLayoutBuilder&			SetSpacing(float horizontal, float vertical);

	struct Snake;

	// context setters
	Snake	StartingAt(BView* view);
	Snake	StartingAt(BLayoutItem* item);

	struct Snake {
		BALMLayoutBuilder::Snake& AddToLeft(BView* view,
									XTab* left = NULL, YTab* top = NULL,
									YTab* bottom = NULL);
		BALMLayoutBuilder::Snake& AddToRight(BView* view,
									XTab* right = NULL, YTab* top = NULL,
									YTab* bottom = NULL);
		BALMLayoutBuilder::Snake& AddAbove(BView* view,
									YTab* top = NULL, XTab* left = NULL,
									XTab* right = NULL);
		BALMLayoutBuilder::Snake& AddBelow(BView* view, YTab* bottom = NULL,
									XTab* left = NULL, XTab* right = NULL);

		BALMLayoutBuilder::Snake& AddToLeft(BLayoutItem* item,
									XTab* left = NULL, YTab* top = NULL,
									YTab* bottom = NULL);
		BALMLayoutBuilder::Snake& AddToRight(BLayoutItem* item,
									XTab* right = NULL, YTab* top = NULL,
									YTab* bottom = NULL);
		BALMLayoutBuilder::Snake& AddAbove(BLayoutItem* item,
									YTab* top = NULL, XTab* left = NULL,
									XTab* right = NULL);
		BALMLayoutBuilder::Snake& AddBelow(BLayoutItem* item,
									YTab* bottom = NULL, XTab* left = NULL,
									XTab* right = NULL);


		// these methods throw away the stack
		Snake						StartingAt(BView* view);
		Snake						StartingAt(BLayoutItem* item);

		Snake					Push();
		Snake&					Pop();

		BALMLayoutBuilder&		End();

	private:
		friend class BALMLayoutBuilder;

								Snake(Area* area, BALMLayoutBuilder* root);
								Snake(Area* area, Snake* previous);

		BALMLayout*				_Layout();
		Area*					_AddToLayout(BView* view, XTab* left, YTab* top,
									XTab* right, YTab* bottom);
		Area*					_AddToLayout(BLayoutItem* item, XTab* left,
									YTab* top, XTab* right, YTab* bottom);

		BALMLayoutBuilder*		fRootBuilder;
		Snake*					fPreviousSnake;
		Area*					fCurrentArea;
	};


private:
	friend struct Snake;

		BALMLayout*				fLayout;
};


};


#endif