Download e-book for kindle: Advanced MVVM by Josh Smith

By Josh Smith

This publication is for WPF and Silverlight builders trying to take their Model-View-ViewModel talents to the subsequent point. It experiences how the MVVM layout trend was once used to create a enjoyable and addictive online game that gives a sublime consumer event. learn this ebook to realize insights from Josh Smith, an well-known specialist in WPF, Silverlight, and MVVM, on tips to accurately layout complicated View and ViewModel architectures. how one can help limitless undo, coordinate lively transitions, keep watch over modal conversation containers from a ViewModel, and lots more and plenty extra.

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That property is set to null when a new game begins. RaisePropertyChanged("GameOver"); } } Once again we see how a ViewModel maintains the logical state of a user interface, while the Views bind against it to present that state in a visual manner. Closing the GameOver Dialog When the user clicks on the ‘PLAY AGAIN’ link it causes some code to execute in the GameOverView code-behind. That event handling method tells the bubble matrix to start a new game and begins a Storyboard which causes the game-over dialog to fly away.

IsIdle is bound to by the BubbleMatrixView’s IsEnabled property. The net effect of this property binding is that the UI will not respond to mouse clicks during an animated transition. The context menu will not open when the ViewModel is not idle because it, too, has its IsEnabled property bound to IsIdle. This ensures that the state of the bubble matrix is stable when a bubble group burst request is issued by the View, because the View cannot make a request during an animated transition. Notice how BubblesTask’s constructor is injected with two delegates: getBubbles and complete.

Afterwards we visited the ViewModel layer and saw how the logical state of the user interface is treated as a first-class citizen of the application. At several points we stopped to reflect on how one can create a separation of concerns by using good judgment and common sense to decide if code should live in the ViewModel or in a View’s code-behind file. Once we had a high-level understanding of the application architecture the real fun began. We saw how animated transitions can improve the user experience, and took a deep dive into how they work in BubbleBurst.

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Advanced MVVM by Josh Smith

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