Add skeletal implementation of NSGestureRecognizer

Headers/AppKit/NSClickGestureRecognizer.h

@@ -1,25 +1,25 @@
 /* Definition of class NSClickGestureRecognizer
    Copyright (C) 2019 Free Software Foundation, Inc.
-   
+
    By: Gregory John Casamento
    Date: Thu Dec  5 12:54:21 EST 2019
 
    This file is part of the GNUstep Library.
-   
+
    This library 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 2 of the License, or (at your option) any later version.
-   
+
    This library 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 this library; see the file COPYING.LIB.
-   If not, see <http://www.gnu.org/licenses/> or write to the 
-   Free Software Foundation, 51 Franklin Street, Fifth Floor, 
+   If not, see <http://www.gnu.org/licenses/> or write to the
+   Free Software Foundation, 51 Franklin Street, Fifth Floor,
    Boston, MA 02110-1301, USA.
 */
 
@@ -37,6 +37,54 @@ extern "C" {
 
 APPKIT_EXPORT_CLASS
 @interface NSClickGestureRecognizer : NSGestureRecognizer
+{
+  /** The mouse button mask that triggers this gesture (default: left mouse button) */
+  NSUInteger _buttonMask;
+  /** The number of clicks required to trigger this gesture (default: 1) */
+  NSUInteger _numberOfClicksRequired;
+  /** The number of touches required for the gesture (default: 1) */
+  NSUInteger _numberOfTouchesRequired;
+}
+
+/**
+ * Returns the mouse button mask that triggers this gesture.
+ * The default value is 1 (left mouse button).
+ * Returns: The mouse button mask for this gesture
+ */
+- (NSUInteger)buttonMask;
+
+/**
+ * Sets the mouse button mask that triggers this gesture.
+ * Use NSLeftMouseDownMask, NSRightMouseDownMask, etc.
+ * mask: The mouse button mask to set
+ */
+- (void)setButtonMask:(NSUInteger)mask;
+
+/**
+ * Returns the number of clicks required to trigger this gesture.
+ * The default value is 1 (single click).
+ * Returns: The number of clicks required
+ */
+- (NSUInteger)numberOfClicksRequired;
+
+/**
+ * Sets the number of clicks required to trigger this gesture.
+ * clicks: The number of clicks required (must be >= 1)
+ */
+- (void)setNumberOfClicksRequired:(NSUInteger)clicks;
+
+/**
+ * Returns the number of touches required for this gesture.
+ * The default value is 1.
+ * Returns: The number of touches required
+ */
+- (NSUInteger)numberOfTouchesRequired;
+
+/**
+ * Sets the number of touches required for this gesture.
+ * touches: The number of touches required (must be >= 1)
+ */
+- (void)setNumberOfTouchesRequired:(NSUInteger)touches;
 
 @end
 

Headers/AppKit/NSEvent.h

@@ -452,6 +452,8 @@ APPKIT_EXPORT_CLASS
           CGFloat deltaY;
           /** Z-axis scroll delta for 3D scroll devices */
           CGFloat deltaZ;
+          /** Magnification factor for gesture events */
+          CGFloat magnification;
         } mouse;
       /** Keyboard event data including characters and key codes */
       struct
@@ -588,6 +590,7 @@ APPKIT_EXPORT_CLASS
  * deltaX: Horizontal scroll delta for scroll events
  * deltaY: Vertical scroll delta for scroll events
  * deltaZ: Z-axis scroll delta for 3D scroll devices
+ * magnificationValue: Magnification factor for gesture events
  * Returns: A new NSEvent object with extended mouse information
  */
 + (NSEvent*) mouseEventWithType: (NSEventType)type
@@ -602,7 +605,8 @@ APPKIT_EXPORT_CLASS
                    buttonNumber: (NSInteger)buttonNum
                          deltaX: (CGFloat)deltaX
                          deltaY: (CGFloat)deltaY
-                         deltaZ: (CGFloat)deltaZ;
+                         deltaZ: (CGFloat)deltaZ
+                  magnification: (CGFloat)magnificationValue;
 #endif
 
 /**
@@ -756,6 +760,17 @@ APPKIT_EXPORT_CLASS
  * Returns: The z-axis scroll distance for this scroll event
  */
 - (CGFloat)deltaZ;
+
+/**
+ * Returns the magnification factor for gesture events.
+ * For trackpad pinch/zoom gestures, this indicates the magnification
+ * change requested by the user. Positive values indicate zoom-in
+ * (magnification increase) while negative values indicate zoom-out
+ * (magnification decrease). The magnitude represents the relative
+ * change in scale factor for the gesture.
+ * Returns: The magnification factor for this gesture event
+ */
+- (CGFloat)magnification;
 #endif
 #if OS_API_VERSION(GS_API_MACOSX, GS_API_LATEST)
 /**