8/15/2023 0 Comments Iscrapbook examples![]() Our favourite abstractions are in danger of becoming abstractions that do too much! Create a mediator that really just needs to use another Mediator or 2.Create a Commit Transaction Mediator Decorator that commits the UnitOfWork at the end of the command.Create a Command that really just needs to use 2 other commands.Create a Commit Transaction Command Decorator that commits the UnitOfWork at the end of the command.Create a set of Commands to write data via a UnitOfWork.Create a set of Queries to read data via a UnitOfWork.It is very easy for these abstractions to grow to the point of failure by not have a clear set of rules. Can an event subscriber reference a command.Can a command decorator reference another command? Maybe.Can a command reference a query? Maybe.Is a Command an atomic unit of work? Maybe. ![]() Can Commands reference other Commands? Maybe.But, I have encountered numerous misunderstandings around exactly what a Command and Query are, where they should or should not be used, and what should be kept separate and when. I love using these abstractions and they have been an integral part of my developer toolbox for the last few years. Public interface IQueryHandler where TQuery : IQuery Queries report on the current state of the domain Public interface ICommandHandler where TCommand : ICommand In other words, asking a question should not change the answer.Ĭommands initiate state change by executing the appropriate behaviour on the domain Bertrand Meyer defines CQS as: every method should either be a command that performs an action, or a query that returns data to the caller, but not both. If you are unfamiliar with these two patterns then please see these posts here and here for a great introduction. At that point you can customize the element as needed to fit the changes you want to make on the page.In this post I will outline an updated perspective on Commands and Queries with respect to applying cross-cutting concerns (aka Aspects or Decorators). These options are hidden until you click the button at the bottom of a selected element to display them. When you feel ready to take over the reins, you can tailor the layout, change the size and skew of elements, finetune typography with kerning and ligatures, add or remove graphics and embellishments, change backgrounds, and much more. In addition, new design tools let you group objects, lock objects, create an unlimited number of layers, crop and zoom photos, and customize smart shapes. This new version of iScrapbook offers a range of other new features: You can vIew pages side-by-side to see exactly how they would appear in books you can resize multiple objects without grouping you can export albums in TIFF, JPEG, PNG, and PDF formats and include a full-screen animated slideshow that you can set up for a one- or two-page display. New in version 2 is the iScrapKits browser, which manages your artwork, makes it searchable, and lets you access the online store where you can purchase complete kits or specific graphical elements. iScrapbook is interoperable with iPhoto so that you can browse your iPhoto pictures and albums directly within the program. Creating an inviting scrapbook page can be as simple as dragging photos to a template, entering your own text, saving, and printing. Although the number of tools and the options available for each of the various elements could potentially overwhelm new users, iScrapbook automates as much of the process as possible. The program represents a good balance of power and flexibility, which means it can serve the needs of new users as well as more experienced digital scrapbookers. The layout of the iScrapbook window makes it easy to drag and drop photos onto your page. The Graphics tab automatically displays photos already on your computer you can easily drag images from there and drop them into your page layout or simply double-click the picture you want to add. A new Bin interface, featuring tabs for Graphics, Text, and Favorites, lets you store and access such elements for easy access and repeated use. Context-sensitive smart inspectors show only the tools needed for a selected operation. The screen design is easy to understand and navigate, even for new users, and the interface features a single window. Choosing the Albums feature opens a project with multiple pages, each of which has a slightly different layout but the same overall color scheme and style-basically a theme.Īfter selecting a page template, the new page opens in the iScrapbook work area. IScrapbook lets you begin with a single page or an album, depending on the size of the project you want to create.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |