micromenu/inc/col.h

#ifndef _COL_H_
#define _COL_H_

class canvas;
#include "gfx/canvas.h"

class Node;
typedef void (*drawfun_t)(int offset, int size, Node*, canvas& c);

void draw_menu(int, int, Node*, canvas& c);

class Drawable{
	public:
		const int minsize;
		const int maxsize;
		drawfun_t render;
	Drawable(drawfun_t fun, int min = 0, int max=0): minsize(min), maxsize(max), render(fun){
	}
};

class Node{
	private:
	Node* parent_ = 0;
	Node* child_ = 0;
	Node* next_ = 0;
	void addNodes(bool b){
	}
	template<class ...Us>
	void addNodes(bool b, Node* n, Us ... ns){
		next_ = n;
		next_->parent_ = parent_;
		next_->addNodes(!b,ns...);
	}
	public:
	Drawable view;
	const char* title_ = 0;
	Node(int min = 24, int max=48): next_(nullptr), child_(nullptr), parent_(nullptr), view(nullptr, min, max){
	}
	Node(const char* t, drawfun_t fun=draw_menu, int min = 24, int max=48) : title_(t), view(fun, min, max), next_(nullptr), child_(nullptr), parent_(nullptr){
	}
	
	template<typename ... Args>
	Node(const char* t, Node* n, Args ... ns) : title_(t), view(draw_menu, 24, 48){
		child_ = n;
		n->parent_=this;
		child_->addNodes(true,ns...);
	}
	Node* getChild(){
		return child_;
	}
};

class Value: public Node{
	public:
	const char* header;
	int state;
	Value(const char* t, int val, drawfun_t fun): Node(t, fun, 64, 96), header(t), state(val){
	}
};

class Layout{
	class Slot{
		private:
			int pos_;
			int size_;
		public:
			Node* node;
		friend Layout;
	};
	private:
		const int maxwidth_;
		int allocated_;
		int allocate_(Node*, int);
		int expand_(int );
		int pack_(int);
	public:
		static const int maxslots = 10;
		Layout(int max) : maxwidth_(max){
			
		}
		int apply(Node*);
		Slot slots[maxslots];
		void render();
};

#endif