/*
 * This file is part of gtkD.
 *
 * gtkD is free software; you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License
 * as published by the Free Software Foundation; either version 3
 * of the License, or (at your option) any later version, with
 * some exceptions, please read the COPYING file.
 *
 * gtkD 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 Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with gtkD; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110, USA
 */

// generated automatically - do not change
// find conversion definition on APILookup.txt
// implement new conversion functionalities on the wrap.utils pakage


module gtk.GestureSwipe;

private import glib.ConstructionException;
private import gobject.ObjectG;
private import gobject.Signals;
private import gtk.Gesture;
private import gtk.GestureSingle;
private import gtk.Widget;
private import gtkc.gtk;
public  import gtkc.gtktypes;
private import std.algorithm;


/**
 * #GtkGestureSwipe is a #GtkGesture implementation able to recognize
 * swipes, after a press/move/.../move/release sequence happens, the
 * #GtkGestureSwipe::swipe signal will be emitted, providing the velocity
 * and directionality of the sequence at the time it was lifted.
 * 
 * If the velocity is desired in intermediate points,
 * gtk_gesture_swipe_get_velocity() can be called on eg. a
 * #GtkGesture::update handler.
 * 
 * All velocities are reported in pixels/sec units.
 */
public class GestureSwipe : GestureSingle
{
	/** the main Gtk struct */
	protected GtkGestureSwipe* gtkGestureSwipe;

	/** Get the main Gtk struct */
	public GtkGestureSwipe* getGestureSwipeStruct(bool transferOwnership = false)
	{
		if (transferOwnership)
			ownedRef = false;
		return gtkGestureSwipe;
	}

	/** the main Gtk struct as a void* */
	protected override void* getStruct()
	{
		return cast(void*)gtkGestureSwipe;
	}

	protected override void setStruct(GObject* obj)
	{
		gtkGestureSwipe = cast(GtkGestureSwipe*)obj;
		super.setStruct(obj);
	}

	/**
	 * Sets our main struct and passes it to the parent class.
	 */
	public this (GtkGestureSwipe* gtkGestureSwipe, bool ownedRef = false)
	{
		this.gtkGestureSwipe = gtkGestureSwipe;
		super(cast(GtkGestureSingle*)gtkGestureSwipe, ownedRef);
	}


	/** */
	public static GType getType()
	{
		return gtk_gesture_swipe_get_type();
	}

	/**
	 * Returns a newly created #GtkGesture that recognizes swipes.
	 *
	 * Params:
	 *     widget = a #GtkWidget
	 *
	 * Returns: a newly created #GtkGestureSwipe
	 *
	 * Since: 3.14
	 *
	 * Throws: ConstructionException GTK+ fails to create the object.
	 */
	public this(Widget widget)
	{
		auto p = gtk_gesture_swipe_new((widget is null) ? null : widget.getWidgetStruct());
		
		if(p is null)
		{
			throw new ConstructionException("null returned by new");
		}
		
		this(cast(GtkGestureSwipe*) p, true);
	}

	/**
	 * If the gesture is recognized, this function returns %TRUE and fill in
	 * @velocity_x and @velocity_y with the recorded velocity, as per the
	 * last event(s) processed.
	 *
	 * Params:
	 *     velocityX = return value for the velocity in the X axis, in pixels/sec
	 *     velocityY = return value for the velocity in the Y axis, in pixels/sec
	 *
	 * Returns: whether velocity could be calculated
	 *
	 * Since: 3.14
	 */
	public bool getVelocity(out double velocityX, out double velocityY)
	{
		return gtk_gesture_swipe_get_velocity(gtkGestureSwipe, &velocityX, &velocityY) != 0;
	}

	protected class OnSwipeDelegateWrapper
	{
		static OnSwipeDelegateWrapper[] listeners;
		void delegate(double, double, GestureSwipe) dlg;
		gulong handlerId;
		
		this(void delegate(double, double, GestureSwipe) dlg)
		{
			this.dlg = dlg;
			this.listeners ~= this;
		}
		
		void remove(OnSwipeDelegateWrapper source)
		{
			foreach(index, wrapper; listeners)
			{
				if (wrapper.handlerId == source.handlerId)
				{
					listeners[index] = null;
					listeners = std.algorithm.remove(listeners, index);
					break;
				}
			}
		}
	}

	/**
	 * This signal is emitted when the recognized gesture is finished, velocity
	 * and direction are a product of previously recorded events.
	 *
	 * Params:
	 *     velocityX = velocity in the X axis, in pixels/sec
	 *     velocityY = velocity in the Y axis, in pixels/sec
	 *
	 * Since: 3.14
	 */
	gulong addOnSwipe(void delegate(double, double, GestureSwipe) dlg, ConnectFlags connectFlags=cast(ConnectFlags)0)
	{
		auto wrapper = new OnSwipeDelegateWrapper(dlg);
		wrapper.handlerId = Signals.connectData(
			this,
			"swipe",
			cast(GCallback)&callBackSwipe,
			cast(void*)wrapper,
			cast(GClosureNotify)&callBackSwipeDestroy,
			connectFlags);
		return wrapper.handlerId;
	}
	
	extern(C) static void callBackSwipe(GtkGestureSwipe* gestureswipeStruct, double velocityX, double velocityY, OnSwipeDelegateWrapper wrapper)
	{
		wrapper.dlg(velocityX, velocityY, wrapper.outer);
	}
	
	extern(C) static void callBackSwipeDestroy(OnSwipeDelegateWrapper wrapper, GClosure* closure)
	{
		wrapper.remove(wrapper);
	}
}