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 private import gtk.c.functions; 33 public import gtk.c.types; 34 public import gtkc.gtktypes; 35 private import std.algorithm; 36 37 38 /** 39 * #GtkGestureZoom is a #GtkGesture implementation able to recognize 40 * pinch/zoom gestures, whenever the distance between both tracked 41 * sequences changes, the #GtkGestureZoom::scale-changed signal is 42 * emitted to report the scale factor. 43 */ 44 public class GestureZoom : Gesture 45 { 46 /** the main Gtk struct */ 47 protected GtkGestureZoom* gtkGestureZoom; 48 49 /** Get the main Gtk struct */ 50 public GtkGestureZoom* getGestureZoomStruct(bool transferOwnership = false) 51 { 52 if (transferOwnership) 53 ownedRef = false; 54 return gtkGestureZoom; 55 } 56 57 /** the main Gtk struct as a void* */ 58 protected override void* getStruct() 59 { 60 return cast(void*)gtkGestureZoom; 61 } 62 63 /** 64 * Sets our main struct and passes it to the parent class. 65 */ 66 public this (GtkGestureZoom* gtkGestureZoom, bool ownedRef = false) 67 { 68 this.gtkGestureZoom = gtkGestureZoom; 69 super(cast(GtkGesture*)gtkGestureZoom, ownedRef); 70 } 71 72 73 /** */ 74 public static GType getType() 75 { 76 return gtk_gesture_zoom_get_type(); 77 } 78 79 /** 80 * Returns a newly created #GtkGesture that recognizes zoom 81 * in/out gestures (usually known as pinch/zoom). 82 * 83 * Params: 84 * widget = a #GtkWidget 85 * 86 * Returns: a newly created #GtkGestureZoom 87 * 88 * Since: 3.14 89 * 90 * Throws: ConstructionException GTK+ fails to create the object. 91 */ 92 public this(Widget widget) 93 { 94 auto p = gtk_gesture_zoom_new((widget is null) ? null : widget.getWidgetStruct()); 95 96 if(p is null) 97 { 98 throw new ConstructionException("null returned by new"); 99 } 100 101 this(cast(GtkGestureZoom*) p, true); 102 } 103 104 /** 105 * If @gesture is active, this function returns the zooming difference 106 * since the gesture was recognized (hence the starting point is 107 * considered 1:1). If @gesture is not active, 1 is returned. 108 * 109 * Returns: the scale delta 110 * 111 * Since: 3.14 112 */ 113 public double getScaleDelta() 114 { 115 return gtk_gesture_zoom_get_scale_delta(gtkGestureZoom); 116 } 117 118 protected class OnScaleChangedDelegateWrapper 119 { 120 void delegate(double, GestureZoom) dlg; 121 gulong handlerId; 122 123 this(void delegate(double, GestureZoom) dlg) 124 { 125 this.dlg = dlg; 126 onScaleChangedListeners ~= this; 127 } 128 129 void remove(OnScaleChangedDelegateWrapper source) 130 { 131 foreach(index, wrapper; onScaleChangedListeners) 132 { 133 if (wrapper.handlerId == source.handlerId) 134 { 135 onScaleChangedListeners[index] = null; 136 onScaleChangedListeners = std.algorithm.remove(onScaleChangedListeners, index); 137 break; 138 } 139 } 140 } 141 } 142 OnScaleChangedDelegateWrapper[] onScaleChangedListeners; 143 144 /** 145 * This signal is emitted whenever the distance between both tracked 146 * sequences changes. 147 * 148 * Params: 149 * scale = Scale delta, taking the initial state as 1:1 150 * 151 * Since: 3.14 152 */ 153 gulong addOnScaleChanged(void delegate(double, GestureZoom) dlg, ConnectFlags connectFlags=cast(ConnectFlags)0) 154 { 155 auto wrapper = new OnScaleChangedDelegateWrapper(dlg); 156 wrapper.handlerId = Signals.connectData( 157 this, 158 "scale-changed", 159 cast(GCallback)&callBackScaleChanged, 160 cast(void*)wrapper, 161 cast(GClosureNotify)&callBackScaleChangedDestroy, 162 connectFlags); 163 return wrapper.handlerId; 164 } 165 166 extern(C) static void callBackScaleChanged(GtkGestureZoom* gesturezoomStruct, double scale, OnScaleChangedDelegateWrapper wrapper) 167 { 168 wrapper.dlg(scale, wrapper.outer); 169 } 170 171 extern(C) static void callBackScaleChangedDestroy(OnScaleChangedDelegateWrapper wrapper, GClosure* closure) 172 { 173 wrapper.remove(wrapper); 174 } 175 }