From a9147eab71538bada96f978ceb7b9692250f461f Mon Sep 17 00:00:00 2001
From: Sebastian Hunkeler <sebastian.hunkeler@iml.unibe.ch>
Date: Sat, 30 Aug 2014 11:08:24 +0200
Subject: [PATCH 1/2] Added new properties

---
 Source/PPSSignatureView.h | 10 ++++++++++
 Source/PPSSignatureView.m | 15 +++++++++++++--
 2 files changed, 23 insertions(+), 2 deletions(-)

diff --git a/Source/PPSSignatureView.h b/Source/PPSSignatureView.h
index 747315a..ce6605d 100644
--- a/Source/PPSSignatureView.h
+++ b/Source/PPSSignatureView.h
@@ -1,12 +1,22 @@
 #import <UIKit/UIKit.h>
 #import <GLKit/GLKit.h>
 
+@protocol PPSSignatureViewDelegate;
+
 @interface PPSSignatureView : GLKView
 
 @property (assign, nonatomic) UIColor *strokeColor;
 @property (assign, nonatomic) BOOL hasSignature;
 @property (strong, nonatomic) UIImage *signatureImage;
+@property(assign, nonatomic) BOOL longPressToEraseEnabled;
+@property(nonatomic,readonly) NSUInteger vertexCount;
+@property(weak, nonatomic)id<PPSSignatureViewDelegate> signatureViewDelegate;
 
 - (void)erase;
 
 @end
+
+
+@protocol PPSSignatureViewDelegate <NSObject>
+-(void)signatureDidChange:(PPSSignatureView*)signatureView;
+@end
\ No newline at end of file
diff --git a/Source/PPSSignatureView.m b/Source/PPSSignatureView.m
index 9ad6d1e..3607433 100644
--- a/Source/PPSSignatureView.m
+++ b/Source/PPSSignatureView.m
@@ -226,6 +226,13 @@ - (UIImage *)signatureImage
     return screenshot;
 }
 
+#pragma mark - Properties
+
+-(NSUInteger)vertexCount
+{
+    return length;
+}
+
 
 #pragma mark - Gesture Recognizers
 
@@ -273,7 +280,8 @@ - (void)tap:(UITapGestureRecognizer *)t {
 
 
 - (void)longPress:(UILongPressGestureRecognizer *)lp {
-    [self erase];
+    if(self.longPressToEraseEnabled)
+        [self erase];
 }
 
 - (void)pan:(UIPanGestureRecognizer *)p {
@@ -358,6 +366,9 @@ - (void)pan:(UIPanGestureRecognizer *)p {
     }
     
 	[self setNeedsDisplay];
+    
+    if(self.signatureViewDelegate)
+        [self.signatureViewDelegate signatureDidChange:self];
 }
 
 
@@ -370,7 +381,7 @@ - (void)setStrokeColor:(UIColor *)strokeColor {
 #pragma mark - Private
 
 - (void)updateStrokeColor {
-    CGFloat red, green, blue, alpha, white;
+    CGFloat red = 0.0, green = 0.0, blue = 0.0, alpha = 0.0, white = 0.0;
     if (effect && self.strokeColor && [self.strokeColor getRed:&red green:&green blue:&blue alpha:&alpha]) {
         effect.constantColor = GLKVector4Make(red, green, blue, alpha);
     } else if (effect && self.strokeColor && [self.strokeColor getWhite:&white alpha:&alpha]) {

From 4f6f19d809a9fa7667f6cdb971bdd2e928789b20 Mon Sep 17 00:00:00 2001
From: Sebastian Hunkeler <sebastian.hunkeler@iml.unibe.ch>
Date: Mon, 23 Feb 2015 23:31:31 +0100
Subject: [PATCH 2/2] Added max stroke width property

---
 Source/PPSSignatureView.h | 1 +
 Source/PPSSignatureView.m | 5 +++--
 2 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/Source/PPSSignatureView.h b/Source/PPSSignatureView.h
index ce6605d..202a3bc 100644
--- a/Source/PPSSignatureView.h
+++ b/Source/PPSSignatureView.h
@@ -10,6 +10,7 @@
 @property (strong, nonatomic) UIImage *signatureImage;
 @property(assign, nonatomic) BOOL longPressToEraseEnabled;
 @property(nonatomic,readonly) NSUInteger vertexCount;
+@property(assign,nonatomic) float strokeMaxWidth;
 @property(weak, nonatomic)id<PPSSignatureViewDelegate> signatureViewDelegate;
 
 - (void)erase;
diff --git a/Source/PPSSignatureView.m b/Source/PPSSignatureView.m
index 3607433..eab9f31 100644
--- a/Source/PPSSignatureView.m
+++ b/Source/PPSSignatureView.m
@@ -2,7 +2,7 @@
 #import <OpenGLES/ES2/glext.h>
 
 #define             STROKE_WIDTH_MIN 0.004 // Stroke width determined by touch velocity
-#define             STROKE_WIDTH_MAX 0.030
+#define     DEFAULT_STROKE_WIDTH_MAX 0.010
 #define       STROKE_WIDTH_SMOOTHING 0.5   // Low pass filter alpha
 
 #define           VELOCITY_CLAMP_MIN 20
@@ -128,6 +128,7 @@ - (void)commonInit {
         self.context = context;
         self.drawableDepthFormat = GLKViewDrawableDepthFormat24;
 		self.enableSetNeedsDisplay = YES;
+		self.strokeMaxWidth = DEFAULT_STROKE_WIDTH_MAX;
         
         // Turn on antialiasing
         self.drawableMultisample = GLKViewDrawableMultisample4X;
@@ -302,7 +303,7 @@ - (void)pan:(UIPanGestureRecognizer *)p {
     float normalizedVelocity = (clampedVelocityMagnitude - VELOCITY_CLAMP_MIN) / (VELOCITY_CLAMP_MAX - VELOCITY_CLAMP_MIN);
     
     float lowPassFilterAlpha = STROKE_WIDTH_SMOOTHING;
-    float newThickness = (STROKE_WIDTH_MAX - STROKE_WIDTH_MIN) * (1 - normalizedVelocity) + STROKE_WIDTH_MIN;
+    float newThickness = (self.strokeMaxWidth - STROKE_WIDTH_MIN) * (1 - normalizedVelocity) + STROKE_WIDTH_MIN;
     penThickness = penThickness * lowPassFilterAlpha + newThickness * (1 - lowPassFilterAlpha);
     
     if ([p state] == UIGestureRecognizerStateBegan) {