Move more Gtkmm2ext widgets into libwidget

libs/widgets/widgets/pane.h

@@ -0,0 +1,133 @@
+/*
+    Copyright (C) 2016 Paul Davis
+
+    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., 675 Mass Ave, Cambridge, MA 02139, USA.
+
+*/
+
+#ifndef _WIDGETS_PANE_H_
+#define _WIDGETS_PANE_H_
+
+#include <vector>
+#include <algorithm>
+#include <boost/shared_ptr.hpp>
+
+#include <stdint.h>
+
+#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:
+	class 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<boost::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);
+	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