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.net barcode generator code project 7: Scrolling with Joy in Objective-C
CHAPTER 7: Scrolling with Joy Encoding DataMatrix In Objective-C Using Barcode creator for iPhone Control to generate, create DataMatrix image in iPhone applications. www.OnBarcode.comGenerate Barcode In Objective-C Using Barcode generation for iPhone Control to generate, create Barcode image in iPhone applications. www.OnBarcode.comTIP: The use of the buttonRadius variable allows you to change the radius of the button in one place, instead of having to update several values in several places. This is not only extra work for a value you might want to tweak several times before you get it exactly the way you want to. It can also introduce subtle bugs, because you re a human and you tend to forget things, like changing that one value over there. Suddenly the button is offset or worse, the input doesn t match the button s location. The InputLayer class schedules the update method: Print QR Code In Objective-C Using Barcode encoder for iPhone Control to generate, create QR Code image in iPhone applications. www.OnBarcode.comData Matrix Printer In Objective-C Using Barcode encoder for iPhone Control to generate, create Data Matrix image in iPhone applications. www.OnBarcode.com[self scheduleUpdate]; Encoding Barcode In Objective-C Using Barcode creator for iPhone Control to generate, create Barcode image in iPhone applications. www.OnBarcode.comUPC Code Generator In Objective-C Using Barcode printer for iPhone Control to generate, create UPC-A Supplement 5 image in iPhone applications. www.OnBarcode.comThe update method is used to check if the button is touched or not: Draw GS1 - 13 In Objective-C Using Barcode encoder for iPhone Control to generate, create UPC - 13 image in iPhone applications. www.OnBarcode.comEuropean Article Number 8 Encoder In Objective-C Using Barcode generator for iPhone Control to generate, create European Article Number 8 image in iPhone applications. www.OnBarcode.com-(void) update:(ccTime)delta { if (fireButton.active) { CCLOG(@"FIRE!!!"); } } Data Matrix ECC200 Decoder In None Using Barcode decoder for Software Control to read, scan read, scan image in Software applications. www.OnBarcode.comDrawing Data Matrix 2d Barcode In VB.NET Using Barcode encoder for Visual Studio .NET Control to generate, create Data Matrix ECC200 image in Visual Studio .NET applications. www.OnBarcode.comInstead of shooting a bullet, I wanted to keep things simple for now and simply log a successful button press. If you try the ScrollingWithJoy05 project now, you ll notice that there isn t any button drawn. Yet when you touch the screen at the lower-right corner you ll see the FIRE!!! message appear in the debugger console. So all is well and right, except that the button can t be seen which we ll need to fix. Encode Barcode In Visual Studio .NET Using Barcode encoder for ASP.NET Control to generate, create Barcode image in ASP.NET applications. www.OnBarcode.comUSS Code 39 Maker In Java Using Barcode creator for Android Control to generate, create Code 3 of 9 image in Android applications. www.OnBarcode.comSkinning the Button
Barcode Scanner In Java Using Barcode Control SDK for BIRT Control to generate, create, read, scan barcode image in BIRT applications. www.OnBarcode.comPDF 417 Creator In Java Using Barcode creation for BIRT Control to generate, create PDF-417 2d barcode image in BIRT reports applications. www.OnBarcode.comEeeww! No, it s not what you think. Skinning in computer graphics refers to giving an otherwise featureless object a texture or simply a different look. In this case we want to actually see our button, so we need an image for that. I also prefer to add cocos2d-style static initializers to external classes using a category, as done in the last chapter. This helps avoid potentially forgetting to send alloc or autorelease messages to a SneakyButton object. I ll start with that by adding a SneakyExtensions class to the ScrollingWithJoy06 project and then stripping the header file down to this: Read EAN13 In Visual Basic .NET Using Barcode scanner for .NET Control to read, scan read, scan image in Visual Studio .NET applications. www.OnBarcode.comEAN / UCC - 14 Maker In Java Using Barcode generation for Java Control to generate, create UCC - 12 image in Java applications. www.OnBarcode.com#import <Foundation/Foundation.h> // SneakyInput headers #import "ColoredCircleSprite.h" #import "SneakyButton.h" #import "SneakyButtonSkinnedBase.h" #import "SneakyJoystick.h" #import "SneakyJoystickSkinnedBase.h" @interface SneakyButton (Extension) +(id) button; +(id) buttonWithRect:(CGRect)rect; @end Creating Barcode In None Using Barcode generation for Software Control to generate, create Barcode image in Software applications. www.OnBarcode.comQR Code 2d Barcode Creation In .NET Framework Using Barcode creation for Visual Studio .NET Control to generate, create Quick Response Code image in VS .NET applications. www.OnBarcode.comCHAPTER 7: Scrolling with Joy
Print DataMatrix In Java Using Barcode encoder for Java Control to generate, create Data Matrix 2d barcode image in Java applications. www.OnBarcode.comEncode Matrix Barcode In Visual Studio .NET Using Barcode creation for Visual Studio .NET Control to generate, create 2D Barcode image in .NET applications. www.OnBarcode.comOnce more, all the SneakyInput headers are added because I plan to make more categories for every SneakyInput class that doesn t conform to regular cocos2d initializers. In this case, a SneakyButton category named Extension is added, which adds two methods, named button and buttonWithRect. They are implemented as shown in Listing 7 8. Listing 7 8. A Category with SneakyButton Autorelease Initializers #import "SneakyExtensions.h" @implementation SneakyButton (Extension) +(id) button { return [[[SneakyButton alloc] initWithRect:CGRectZero] autorelease]; } +(id) buttonWithRect:(CGRect)rect { return [[[SneakyButton alloc] initWithRect:rect] autorelease]; } @end They simply wrap the alloc and autorelease calls. Also, I decided to add a simple, parameterless button initializer because the CGRect parameter isn t really used anyway. This allows me to initialize the fireButton in a straightforward manner: fireButton = [SneakyButton button]; It s just a little extra effort for more convenience and cleaner code. I ll be adding more convenience methods to SneakyExtensions without discussing them in the book, as the principle is the same. Now my mind is at peace and I can start skinning the button. I created four button images that are 100 100 pixels in size twice the final button radius of 50 that I m going with. The button images come in four variations: Default, Pressed, Activated, and Disabled. The default state is what the button looks like when it isn t pressed, which should make it obvious what the Pressed state is. The Activated state only comes into play for toggle buttons, meaning the toggle button is active, or on. The Disabled image is used if the button currently has no function. For example, when the ship s weapons are overheated and you can t shoot for a few seconds, you could disable the button and it would show the Disabled image. For the shoot button, I only needed to use the Default and Pressed images. Listing 7 9 shows the updated addFireButton method. Listing 7 9. Replacing Listing 7 7 with a Skinned Button float buttonRadius = 50; CGSize screenSize = [[CCDirector sharedDirector] winSize]; fireButton = [SneakyButton button]; fireButton.isHoldable = YES; SneakyButtonSkinnedBase* skinFireButton = [SneakyButtonSkinnedBase skinnedButton]; skinFireButton.position = CGPointMake(screenSize.width - buttonRadius, buttonRadius); skinFireButton.defaultSprite = [CCSprite spriteWithSpriteFrameName: @"button-default.png"];
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