gtk.GestureZoom source code

1 /*
2  * This file is part of gtkD.
3  *
4  * gtkD is free software; you can redistribute it and/or modify
5  * it under the terms of the GNU Lesser General Public License
6  * as published by the Free Software Foundation; either version 3
7  * of the License, or (at your option) any later version, with
8  * some exceptions, please read the COPYING file.
9  *
10  * gtkD is distributed in the hope that it will be useful,
11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
13  * GNU Lesser General Public License for more details.
14  *
15  * You should have received a copy of the GNU Lesser General Public License
16  * along with gtkD; if not, write to the Free Software
17  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110, USA
18  */
19 
20 // generated automatically - do not change
21 // find conversion definition on APILookup.txt
22 // implement new conversion functionalities on the wrap.utils pakage
23 
24 
25 module gtk.GestureZoom;
26 
27 private import glib.ConstructionException;
28 private import gobject.ObjectG;
29 private import gobject.Signals;
30 private import gtk.Gesture;
31 private import gtk.Widget;
32 public  import gtkc.gdktypes;
33 private import gtkc.gtk;
34 public  import gtkc.gtktypes;
35 
36 
37 /**
38  * #GtkGestureZoom is a #GtkGesture implementation able to recognize
39  * pinch/zoom gestures, whenever the distance between both tracked
40  * sequences changes, the #GtkGestureZoom::scale-changed signal is
41  * emitted to report the scale factor.
42  */
43 public class GestureZoom : Gesture
44 {
45 	/** the main Gtk struct */
46 	protected GtkGestureZoom* gtkGestureZoom;
47 
48 	/** Get the main Gtk struct */
49 	public GtkGestureZoom* getGestureZoomStruct()
50 	{
51 		return gtkGestureZoom;
52 	}
53 
54 	/** the main Gtk struct as a void* */
55 	protected override void* getStruct()
56 	{
57 		return cast(void*)gtkGestureZoom;
58 	}
59 
60 	protected override void setStruct(GObject* obj)
61 	{
62 		gtkGestureZoom = cast(GtkGestureZoom*)obj;
63 		super.setStruct(obj);
64 	}
65 
66 	/**
67 	 * Sets our main struct and passes it to the parent class.
68 	 */
69 	public this (GtkGestureZoom* gtkGestureZoom, bool ownedRef = false)
70 	{
71 		this.gtkGestureZoom = gtkGestureZoom;
72 		super(cast(GtkGesture*)gtkGestureZoom, ownedRef);
73 	}
74 
75 	/**
76 	 */
77 
78 	public static GType getType()
79 	{
80 		return gtk_gesture_zoom_get_type();
81 	}
82 
83 	/**
84 	 * Returns a newly created #GtkGesture that recognizes zoom
85 	 * in/out gestures (usually known as pinch/zoom).
86 	 *
87 	 * Params:
88 	 *     widget = a #GtkWidget
89 	 *
90 	 * Return: a newly created #GtkGestureZoom
91 	 *
92 	 * Since: 3.14
93 	 *
94 	 * Throws: ConstructionException GTK+ fails to create the object.
95 	 */
96 	public this(Widget widget)
97 	{
98 		auto p = gtk_gesture_zoom_new((widget is null) ? null : widget.getWidgetStruct());
99 		
100 		if(p is null)
101 		{
102 			throw new ConstructionException("null returned by new");
103 		}
104 		
105 		this(cast(GtkGestureZoom*) p, true);
106 	}
107 
108 	/**
109 	 * If @gesture is active, this function returns the zooming difference
110 	 * since the gesture was recognized (hence the starting point is
111 	 * considered 1:1). If @gesture is not active, 1 is returned.
112 	 *
113 	 * Return: the scale delta
114 	 *
115 	 * Since: 3.14
116 	 */
117 	public double getScaleDelta()
118 	{
119 		return gtk_gesture_zoom_get_scale_delta(gtkGestureZoom);
120 	}
121 
122 	int[string] connectedSignals;
123 
124 	void delegate(double, GestureZoom)[] onScaleChangedListeners;
125 	/**
126 	 * This signal is emitted whenever the distance between both tracked
127 	 * sequences changes.
128 	 *
129 	 * Params:
130 	 *     scale = Scale delta, taking the initial state as 1:1
131 	 *
132 	 * Since: 3.14
133 	 */
134 	void addOnScaleChanged(void delegate(double, GestureZoom) dlg, ConnectFlags connectFlags=cast(ConnectFlags)0)
135 	{
136 		if ( "scale-changed" !in connectedSignals )
137 		{
138 			Signals.connectData(
139 				this,
140 				"scale-changed",
141 				cast(GCallback)&callBackScaleChanged,
142 				cast(void*)this,
143 				null,
144 				connectFlags);
145 			connectedSignals["scale-changed"] = 1;
146 		}
147 		onScaleChangedListeners ~= dlg;
148 	}
149 	extern(C) static void callBackScaleChanged(GtkGestureZoom* gesturezoomStruct, double scale, GestureZoom _gesturezoom)
150 	{
151 		foreach ( void delegate(double, GestureZoom) dlg; _gesturezoom.onScaleChangedListeners )
152 		{
153 			dlg(scale, _gesturezoom);
154 		}
155 	}
156 }