pane.h

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/*
 * Copyright (C) 2016 Paul Davis <paul@linuxaudiosystems.com>
 * Copyright (C) 2017 Robin Gareus <robin@gareus.org>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License along
 * with this program; if not, write to the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 */
 
#ifndef _WIDGETS_PANE_H_
#define _WIDGETS_PANE_H_
 
#include <cstdint>
#include <memory>
#include <vector>
#include <algorithm>
 
 
#include <gdkmm/cursor.h>
#include <gtkmm/container.h>
#include <gtkmm/eventbox.h>
 
#include "widgets/visibility.h"
 
namespace Gtk {
        class Widget;
}
 
namespace ArdourWidgets {
 
class LIBWIDGETS_API Pane : public Gtk::Container
{
private:
        struct Divider;
 
public:
        struct Child
        {
                Pane* pane;
                Gtk::Widget* w;
                int32_t minsize;
                sigc::connection show_con;
                sigc::connection hide_con;
 
                Child (Pane* p, Gtk::Widget* widget, uint32_t ms) : pane (p), w (widget), minsize (ms) {}
        };
 
        typedef std::vector<std::shared_ptr<Child> > Children;
 
        Pane (bool horizontal);
        ~Pane();
 
        void set_divider (std::vector<float>::size_type divider, float fract);
        float get_divider (std::vector<float>::size_type divider = 0) const;
        void set_child_minsize (Gtk::Widget const &, int32_t);
 
        GType child_type_vfunc() const;
        void set_drag_cursor (Gdk::Cursor);
 
        void set_check_divider_position (bool);
 
protected:
        bool horizontal;
 
        void on_add (Gtk::Widget*);
        void on_remove (Gtk::Widget*);
        void on_size_request (GtkRequisition*);
        void on_size_allocate (Gtk::Allocation&);
        bool on_expose_event (GdkEventExpose*);
 
        bool handle_press_event (GdkEventButton*, Divider*);
        bool handle_release_event (GdkEventButton*, Divider*);
        bool handle_motion_event (GdkEventMotion*, Divider*);
        bool handle_enter_event (GdkEventCrossing*, Divider*);
        bool handle_leave_event (GdkEventCrossing*, Divider*);
 
        void forall_vfunc (gboolean include_internals, GtkCallback callback, gpointer callback_data);
 
private:
        Gdk::Cursor drag_cursor;
        bool did_move;
 
        void reallocate (Gtk::Allocation const &);
 
        Children children;
 
        struct Divider : public Gtk::EventBox {
                Divider ();
 
                float fract;
                bool dragging;
 
                bool on_expose_event (GdkEventExpose* ev);
        };
 
        typedef std::list<Divider*> Dividers;
        Dividers dividers;
        int divider_width;
        bool check_fract;
 
        void add_divider ();
        void handle_child_visibility ();
        float constrain_fract (Dividers::size_type, float fract);
 
        static void* notify_child_destroyed (void*);
        void* child_destroyed (Gtk::Widget*);
};
 
class LIBWIDGETS_API HPane : public Pane
{
  public:
        HPane () : Pane (true) {}
};
 
class LIBWIDGETS_API VPane : public Pane
{
  public:
        VPane () : Pane (false) {}
};
 
} /* namespace */
 
#endif