Added MPExpressionLayout, MPFunctionLayout and MPExpressionStorage as Rendering System for Expressions

MathPad/MPExpressionView.m

@@ -7,23 +7,73 @@
 //
 
 #import "MPExpressionView.h"
+#import "MPExpressionLayout.h"
+#import "MPExpressionStorage.h"
+
+#import "NSObject+MPStringTest.h"
+
+#import "MPSumFunction.h"
+
+@interface MPExpressionView ()
+@end
 
 @implementation MPExpressionView
 
+#pragma mark Creation Methods
+
+- (instancetype)init
+{
+    self = [super init];
+    if (self) {
+        [self initializeObjects];
+    }
+    return self;
+}
+
 - (id)initWithFrame:(NSRect)frame
 {
     self = [super initWithFrame:frame];
     if (self) {
-        // Initialization code here.
+        [self initializeObjects];
     }
     return self;
 }
 
+- (id)initWithCoder:(NSCoder *)aDecoder
+{
+    self = [super initWithCoder:aDecoder];
+    if (self) {
+        [self initializeObjects];
+    }
+    return self;
+}
+
+- (void)initializeObjects
+{
+    MPExpressionStorage *expressionStorage = [[MPExpressionStorage alloc] initWithSymbols:@[@"12345", [[MPSumFunction alloc] init]]];
+    _expressionStorage = expressionStorage;
+}
+
+#pragma mark Properties
+
+- (MPExpressionLayout *)expressionLayout
+{
+    return self.expressionStorage.expressionLayout;
+}
+
+#pragma mark Drawing Methods
+
 - (void)drawRect:(NSRect)dirtyRect
 {
     [super drawRect:dirtyRect];
-    
-    // Drawing code here.
+    [[NSColor whiteColor] set];
+    NSRectFill(self.bounds);
+    [[NSColor blackColor] set];
+    NSSize expressionSize = [self.expressionLayout sizeForAllSymbols];
+    CGFloat y = (self.bounds.size.height - expressionSize.height) / 2;
+    NSLog(@"%f", self.bounds.origin.y);
+    NSPoint point = NSMakePoint(self.bounds.origin.x, self.bounds.origin.y + y);
+    [self.expressionLayout drawAllSymbolsAtPoint:point];
 }
 
 @end