Added size constraints and enhanced save/load functionality

JWSplitView/JWSplitView-Info.plist

@@ -0,0 +1,30 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+	<key>CFBundleDevelopmentRegion</key>
+	<string>English</string>
+	<key>CFBundleExecutable</key>
+	<string>${EXECUTABLE_NAME}</string>
+	<key>CFBundleIconFile</key>
+	<string></string>
+	<key>CFBundleIdentifier</key>
+	<string>AppJon.${PRODUCT_NAME:rfc1034identifier}</string>
+	<key>CFBundleInfoDictionaryVersion</key>
+	<string>6.0</string>
+	<key>CFBundleName</key>
+	<string>${PRODUCT_NAME}</string>
+	<key>CFBundlePackageType</key>
+	<string>FMWK</string>
+	<key>CFBundleShortVersionString</key>
+	<string>1.0</string>
+	<key>CFBundleSignature</key>
+	<string>????</string>
+	<key>CFBundleVersion</key>
+	<string>1</string>
+	<key>NSHumanReadableCopyright</key>
+	<string>Copyright © 2013 Jonathan Willing. All rights reserved.</string>
+	<key>NSPrincipalClass</key>
+	<string></string>
+</dict>
+</plist>

JWSplitView/JWSplitView-Prefix.pch

@@ -0,0 +1,7 @@
+//
+// Prefix header for all source files of the 'JWSplitView' target in the 'JWSplitView' project
+//
+
+#ifdef __OBJC__
+    #import <Cocoa/Cocoa.h>
+#endif

JWSplitView/JWSplitView.h

@@ -27,27 +27,33 @@ enum {
 typedef NSInteger JWSplitViewDividerStyle;
 
 @class JWDividerView;
+@protocol JWSplitViewDelegate;
+
 @interface JWSplitView : NSView
 
-//- (void)setView:(NSView *)view forSplitView:(NSUInteger)splitView;
 - (void)addSplitView:(NSView *)view;
 - (NSView *)splitViewAtIndex:(NSUInteger)index;
 - (JWDividerView *)dividerAtSplitViewIndex:(NSUInteger)index;
 
+@property (nonatomic) NSArray *splitterPositions;
+@property (nonatomic, weak) id <JWSplitViewDelegate> delegate;
 @property (nonatomic, readwrite) CGFloat dividerThickness;
-//@property (nonatomic, copy) TUIViewDrawRect dividerDrawRectBlock;
-
 @property (nonatomic, getter = isHorizontal) BOOL horizontal;
-
 @property (nonatomic, assign) JWSplitViewDividerStyle dividerStyle;
-
 @property (nonatomic, copy) NSString *autosaveName;
 
-//- (NSLayoutPriority)holdingPriorityForSubviewAtIndex:(NSInteger)subviewIndex;
-//- (void)setHoldingPriority:(NSLayoutPriority)priority forSubviewAtIndex:(NSInteger)subviewIndex;
-
 @end
 
 @interface JWDividerView : NSView
 @property (nonatomic, assign, readonly) NSLayoutConstraint *constraint;
 @end
+
+@protocol JWSplitViewDelegate <NSObject>
+@optional
+
+- (CGFloat)splitView:(JWSplitView *)splitView constrainMinCoordinate:(CGFloat)proposedMaximumPosition ofSubviewAt:(NSInteger)index;
+- (CGFloat)splitView:(JWSplitView *)splitView constrainMaxCoordinate:(CGFloat)proposedMaximumPosition ofSubviewAt:(NSInteger)index;
+
+@end
+
+extern NSString * const JWSplitViewDidResizeNotification;

JWSplitView/JWSplitView.m

@@ -22,6 +22,8 @@
 #import "JWSplitView.h"
 #import <objc/runtime.h>
 
+NSString * const JWSplitViewDidResizeNotification = @"JWSplitViewDidResizeNotification";
+
 @class JWDividerView;
 typedef void (^JWSplitViewDraggingHandler)(NSEvent *dragEvent, JWDividerView *divider, id sender);
 
@@ -194,14 +196,23 @@ - (void)mouseDownOnDivider:(JWDividerView *)divider withEvent:(NSEvent *)downEve
     BOOL horizontal = self.horizontal;
     CGFloat originalConstant = divider.constraint.constant;
 
+    __block JWSplitView *me = self;
     self.dragHandler = ^(NSEvent *event, JWDividerView *currentDivider, id sender) {
         CGPoint mouseCurrentPoint = [event locationInWindow];
 
         CGFloat deltaY = ceil(mouseCurrentPoint.y - mouseDownPoint.y);
         CGFloat deltaX = ceil(mouseDownPoint.x - mouseCurrentPoint.x);
 
         CGFloat newConstant = originalConstant - (horizontal ? deltaX : deltaY);
+        CGFloat minimum = [me.delegate respondsToSelector:@selector(splitView:constrainMinCoordinate:ofSubviewAt:)] ? [me.delegate splitView:me constrainMinCoordinate:newConstant ofSubviewAt:[me.dividers indexOfObject:currentDivider] - 1] : -1;
+        CGFloat maximum = [me.delegate respondsToSelector:@selector(splitView:constrainMinCoordinate:ofSubviewAt:)] ? [me.delegate splitView:me constrainMaxCoordinate:newConstant ofSubviewAt:[me.dividers indexOfObject:currentDivider] - 1] : -1;
+
         currentDivider.constraint.constant = newConstant;
+
+        if (maximum != -1 && newConstant > maximum) currentDivider.constraint.constant = maximum;
+        else if (maximum != -1 && newConstant < minimum) currentDivider.constraint.constant = minimum;
+
+        [[NSNotificationCenter defaultCenter] postNotificationName:JWSplitViewDidResizeNotification object:me];
     };
 }
 
@@ -252,6 +263,20 @@ - (void)savePositions {
     [[NSUserDefaults standardUserDefaults] setObject:data forKey:self.autosaveName];
 }
 
+- (NSArray *)splitterPositions
+{
+    NSMutableArray *array = [NSMutableArray array];
+    for (NSLayoutConstraint *constraint in self.dividerConstraints) [array addObject:@(constraint.constant)];
+
+    return array;
+}
+
+- (void)setSplitterPositions:(NSArray *)splitterPositions
+{
+    NSInteger limit = splitterPositions.count;
+    for (NSInteger i = 0; i < limit; i++) [self.dividerConstraints[i] setConstant:[splitterPositions[i] doubleValue]];
+}
+
 @end
 
 
@@ -317,7 +342,6 @@ - (void)drawRect:(NSRect)dirtyRect {
 @implementation NSView (LayoutExtensions)
 
 static char NSViewLayoutPriorityKey;
-static char NSViewLayoutConstraintKey;
 
 - (void)setPriority:(NSLayoutPriority)priority {
     NSAssert(priority > NSLayoutPriorityDragThatCanResizeWindow, @"Split view layout priority cannot exceed NSLayoutPriorityDragThatCannotResizeWindow");

JWSplitView/en.lproj/InfoPlist.strings

@@ -0,0 +1,2 @@
+/* Localized versions of Info.plist keys */
+