Refactor & add procedural example.

Classes/ExamplesViewController.m

@@ -9,8 +9,9 @@
 #import "ExamplesViewController.h"
 #import "PDFExampleViewController.h"
 #import "ImageExampleViewController.h"
+#import "ProceduralExampleViewController.h"
 
-enum {PDF, IMAGE, NUM_EXAMPLES};
+enum {PDF, IMAGE, PROCEDURAL, NUM_EXAMPLES};
 
 @implementation ExamplesViewController
 
@@ -49,6 +50,7 @@ - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(N
 	switch (indexPath.row) {
 		case PDF: cell.textLabel.text = @"PDF example"; break;
 		case IMAGE: cell.textLabel.text = @"Image example"; break;
+		case PROCEDURAL: cell.textLabel.text = @"Procedural example"; break;
 		default: cell.textLabel.text = @"";
 	}    
     return cell;
@@ -65,6 +67,9 @@ - (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath
 		case IMAGE: 
 			viewController = [[[ImageExampleViewController alloc] init] autorelease]; 
 			break;
+		case PROCEDURAL:
+			viewController = [[[ProceduralExampleViewController alloc] init] autorelease]; 
+			break;
 		default: 
 			viewController = [[[UIViewController alloc] init] autorelease];
 	} 

Classes/ImageExampleViewController.h

@@ -8,7 +8,7 @@
 
 #import "LeavesViewController.h"
 
-@interface ImageExampleViewController : LeavesViewController <LeavesViewDataSource, LeavesViewDelegate> {
+@interface ImageExampleViewController : LeavesViewController {
 	NSArray *images;
 }
 

Classes/ImageExampleViewController.m

@@ -42,13 +42,4 @@ - (void) renderPageAtIndex:(NSUInteger)index inContext:(CGContextRef)ctx {
 	CGContextDrawImage(ctx, imageRect, [image CGImage]);
 }
 
-#pragma mark UIViewController methods
-
-- (void) viewDidLoad {
-	[super viewDidLoad];
-	leavesView.dataSource = self;
-	leavesView.delegate = self;
-	[leavesView reloadData];
-}
-
 @end

Classes/LeavesAppDelegate.m

@@ -30,5 +30,4 @@ - (void)dealloc {
     [super dealloc];
 }
 
-
 @end

Classes/PDFExampleViewController.h

@@ -8,7 +8,7 @@
 
 #import "LeavesViewController.h"
 
-@interface PDFExampleViewController : LeavesViewController <LeavesViewDataSource, LeavesViewDelegate> {
+@interface PDFExampleViewController : LeavesViewController {
 	CGPDFDocumentRef pdf;
 }
 

Classes/PDFExampleViewController.m

@@ -39,12 +39,4 @@ - (void) renderPageAtIndex:(NSUInteger)index inContext:(CGContextRef)ctx {
 	CGContextDrawPDFPage(ctx, page);
 }
 
-#pragma mark UIViewController methods
-
-- (void) viewDidLoad {
-	[super viewDidLoad];
-	leavesView.dataSource = self;
-	leavesView.delegate = self;
-	[leavesView reloadData];
-}
 @end

Classes/ProceduralExampleViewController.h

@@ -0,0 +1,16 @@
+//
+//  MinimalExampleViewController.h
+//  Leaves
+//
+//  Created by Tom Brow on 4/20/10.
+//  Copyright 2010 Tom Brow. All rights reserved.
+//
+
+#import "LeavesViewController.h"
+
+
+@interface ProceduralExampleViewController : LeavesViewController {
+
+}
+
+@end

Classes/ProceduralExampleViewController.m

@@ -0,0 +1,29 @@
+//
+//  MinimalExampleViewController.m
+//  Leaves
+//
+//  Created by Tom Brow on 4/20/10.
+//  Copyright 2010 Tom Brow. All rights reserved.
+//
+
+#import "ProceduralExampleViewController.h"
+
+
+@implementation ProceduralExampleViewController
+
+#pragma mark LeavesViewDataSource methods
+
+- (NSUInteger) numberOfPagesInLeavesView:(LeavesView*)leavesView {
+	return 10;
+}
+
+- (void) renderPageAtIndex:(NSUInteger)index inContext:(CGContextRef)ctx {
+	CGRect bounds = CGContextGetClipBoundingBox(ctx);
+	CGContextSetFillColorWithColor(ctx, [[UIColor colorWithHue:index/10.0 
+													saturation:0.8
+													brightness:0.8 
+														 alpha:1.0] CGColor]);
+	CGContextFillRect(ctx, CGRectInset(bounds, 100, 100));
+}
+
+@end

Leaves.xcodeproj/project.pbxproj

@@ -25,6 +25,7 @@
 		D33D4ED2117D8D4500BA7203 /* paper.pdf in Resources */ = {isa = PBXBuildFile; fileRef = D33D4ECA117D8D4500BA7203 /* paper.pdf */; };
 		D33D4F01117D8EAE00BA7203 /* main.m in Sources */ = {isa = PBXBuildFile; fileRef = D33D4F00117D8EAE00BA7203 /* main.m */; };
 		D33D4F41117E244C00BA7203 /* ExamplesViewController.m in Sources */ = {isa = PBXBuildFile; fileRef = D33D4F40117E244C00BA7203 /* ExamplesViewController.m */; };
+		D33D5176117E780300BA7203 /* ProceduralExampleViewController.m in Sources */ = {isa = PBXBuildFile; fileRef = D33D5175117E780300BA7203 /* ProceduralExampleViewController.m */; };
 /* End PBXBuildFile section */
 
 /* Begin PBXFileReference section */
@@ -56,6 +57,8 @@
 		D33D4F00117D8EAE00BA7203 /* main.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = main.m; sourceTree = SOURCE_ROOT; };
 		D33D4F3F117E244C00BA7203 /* ExamplesViewController.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = ExamplesViewController.h; sourceTree = "<group>"; };
 		D33D4F40117E244C00BA7203 /* ExamplesViewController.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = ExamplesViewController.m; sourceTree = "<group>"; };
+		D33D5174117E780300BA7203 /* ProceduralExampleViewController.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = ProceduralExampleViewController.h; sourceTree = "<group>"; };
+		D33D5175117E780300BA7203 /* ProceduralExampleViewController.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = ProceduralExampleViewController.m; sourceTree = "<group>"; };
 /* End PBXFileReference section */
 
 /* Begin PBXFrameworksBuildPhase section */
@@ -84,6 +87,8 @@
 				D33D4B50117C473500BA7203 /* PDFExampleViewController.m */,
 				D33D4F3F117E244C00BA7203 /* ExamplesViewController.h */,
 				D33D4F40117E244C00BA7203 /* ExamplesViewController.m */,
+				D33D5174117E780300BA7203 /* ProceduralExampleViewController.h */,
+				D33D5175117E780300BA7203 /* ProceduralExampleViewController.m */,
 			);
 			path = Classes;
 			sourceTree = "<group>";
@@ -233,6 +238,7 @@
 				D33D4ECC117D8D4500BA7203 /* Utilities.m in Sources */,
 				D33D4F01117D8EAE00BA7203 /* main.m in Sources */,
 				D33D4F41117E244C00BA7203 /* ExamplesViewController.m in Sources */,
+				D33D5176117E780300BA7203 /* ProceduralExampleViewController.m in Sources */,
 			);
 			runOnlyForDeploymentPostprocessing = 0;
 		};

Leaves/LeavesViewController.h

@@ -9,7 +9,7 @@
 #import <UIKit/UIKit.h>
 #import "LeavesView.h"
 
-@interface LeavesViewController : UIViewController {
+@interface LeavesViewController : UIViewController <LeavesViewDataSource, LeavesViewDelegate> {
 	LeavesView *leavesView;
 }
 

Leaves/LeavesViewController.m

@@ -22,19 +22,30 @@ - (void)dealloc {
     [super dealloc];
 }
 
+#pragma mark LeavesViewDataSource methods
+
+- (NSUInteger) numberOfPagesInLeavesView:(LeavesView*)leavesView {
+	return 0;
+}
+
+- (void) renderPageAtIndex:(NSUInteger)index inContext:(CGContextRef)ctx {
+
+}
+
+#pragma mark  UIViewController methods
+
 - (void)loadView {
 	[super loadView];
 	leavesView.frame = self.view.bounds;
 	leavesView.autoresizingMask = UIViewAutoresizingFlexibleWidth|UIViewAutoresizingFlexibleHeight;
 	[self.view addSubview:leavesView];
 }
 
-/*
-// Override to allow orientations other than the default portrait orientation.
-- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation {
-    // Return YES for supported orientations
-    return (interfaceOrientation == UIInterfaceOrientationPortrait);
+- (void) viewDidLoad {
+	[super viewDidLoad];
+	leavesView.dataSource = self;
+	leavesView.delegate = self;
+	[leavesView reloadData];
 }
-*/
 
 @end