63 lines
1.9 KiB
C++
63 lines
1.9 KiB
C++
#pragma once
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#include <cgv/base/node.h>
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#include <cgv/signal/bool_signal.h>
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#include "lib_begin.h"
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namespace cgv {
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namespace gui {
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/// type independent &base class of all views
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class CGV_API abst_view : public cgv::base::node
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{
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protected:
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abst_view* next_in_list;
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abst_view* prev_in_list;
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const void* ptr;
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public:
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/// pass name on to node, careful the implementation of this is in the source file control.cxx to avoid name clashes with view.cxx
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abst_view(const std::string& name);
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/// ensures detachment of view
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~abst_view();
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/// return whether the view edits the value pointed to by ptr
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virtual bool shows(const void* ptr) const = 0;
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/// links all views to a reference into a doubly linked list in order to allow controls of the reference to update all attached views
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void attach_to_reference(const void* ptr);
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/// detach view again
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void detach_from_reference();
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/// calls the update method of all other attached views
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void update_views();
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};
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extern CGV_API void update_views(void* member_ptr);
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/// ref counted pointer to abst view
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typedef data::ref_ptr<abst_view> view_ptr;
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#if _MSC_VER >= 1400
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CGV_TEMPLATE template class CGV_API data::ref_ptr<abst_view>;
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#endif
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/// class for %gui elements that %view values of the %type specified in the template argument
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template <typename T>
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class view : public abst_view
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{
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protected:
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const T* value_ptr;
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public:
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/// construct abstract element from reference to value
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view(const std::string& _name, const T& _value) : abst_view(_name), value_ptr(&_value) {
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attach_to_reference(value_ptr);
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}
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/// return the current value
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const T& get_value() const { return *value_ptr; }
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/// check whether the value viewed by this element is pointing to the given pointer
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bool shows(const void* ptr) const { return value_ptr == ptr; }
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};
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}
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}
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#include <cgv/config/lib_end.h>
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