layout.h

#pragma once
 
#include <cgv/base/base.h>
#include <cgv/base/group.h>
#include <cgv/gui/resizable.h>
#include <cgv/signal/signal.h>
#include <cgv/signal/rebind.h>
#include <cgv/data/ref_ptr.h>
#include <cgv/type/variant.h>
 
#include <cgv/gui/layout_spacings.h>
 
#include "lib_begin.h"
 
namespace cgv {
    namespace gui {

        enum layout_hint 
        {
            LH_HSHRINK = 1<<0,
            LH_HEXPAND = 1<<1,
            LH_HFILL = 1<<2,
            LH_LEFT = 1<<3,
            LH_CENTER = 1<<4,
            LH_RIGHT = 1<<5,
 
            LH_VSHRINK = 1<<6,
            LH_VEXPAND = 1<<7,
            LH_VFILL = 1<<8,
            LH_TOP = 1<<9,
            LH_MIDDLE = 1<<10,
            LH_BOTTOM = 1<<11,
 
            LH_HHINTS = 0,
            LH_VHINTS = 6
        };
 
        // abstract class to define a layout on containers.
        class CGV_API layout: public cgv::base::base
        {
        public:
            // constructor that sets a container
            layout(cgv::base::group_ptr container = 0);
            // empty destructor
            ~layout();
 
            // set a container to be layouted
            void set_container(cgv::base::group_ptr container);
 
            // set the spacing parameters
            void set_spacings(const layout_spacings spacings);
 
            // update children
            virtual void update() {};
 
            // resize
            void resize(int w, int h);
 
            virtual std::string get_property_declarations();
            virtual bool set_void(const std::string &property, const std::string &value_type, const void *value_ptr);
            virtual bool get_void(const std::string &property, const std::string &value_type, void *value_ptr);
 
        protected:
            cgv::base::group_ptr container;
            int w, h, true_w, true_h;
            int min_w, min_h, default_w, default_h;
            layout_spacings spacings;
            std::string spacings_name;
 
            // get the layout hints for a child
            int get_child_layout_hints(cgv::base::base_ptr child);
 
            // get the layouted container
            cgv::base::group_ptr get_container();
    
            // get a child from the container.
            cgv::base::base_ptr get_child(unsigned int i);
 
            // get the size of a child
            void get_child_size(const cgv::base::base_ptr child, int &width, int &height);
            // set the size of a child
            void set_child_size(const cgv::base::base_ptr child, int width, int height);
 
            // get the default size of a child
            void get_child_default_size(const cgv::base::base_ptr child, int &width, int &height);
 
            // get the position of a child
            void get_child_position(const cgv::base::base_ptr child, int &x, int &y);
            // set the position of a child
            void set_child_position(const cgv::base::base_ptr child, int x, int y);
 
            // get the mimimum size of a child
            void get_child_minimum_size(const cgv::base::base_ptr child, int &width, int &height);
        };

    typedef cgv::data::ref_ptr<layout> layout_ptr;
 
 
    }
}
 
 
#include <cgv/config/lib_end.h>