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Advanced MVVM by Josh Smith PDF

By Josh Smith

This publication is for WPF and Silverlight builders trying to take their Model-View-ViewModel talents to the following point. It studies how the MVVM layout development used to be used to create a enjoyable and addictive video game that offers a sublime consumer adventure. learn this booklet to achieve insights from Josh Smith, an famous professional in WPF, Silverlight, and MVVM, on tips to safely layout advanced View and ViewModel architectures. easy methods to 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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Those method calls ensure that the bubbles return the proper values from their PreviousRow and PreviousColumn properties. This is necessary for creating accurate Duration and To values for the animations used to move the bubbles to their new locations. Before we dive into that, first let’s review how bubble locations are managed. Managing Bubble Locations In order for a bubble to know where to move to when the user performs an undo operation, each of its locations in the bubble matrix is archived.

Begin(this); } else { // There are no bubbles associated with this task, // so immediately move to the task completion phase. ProcessNextTask(); } This simple mechanism is all that’s required to process the task queue. The PerformTask method must check to see if its storyboard argument is null, because it is possible that a task could have no bubbles associated with it. This situation arises when, for example, there are no bubbles to move down after the user bursts a bubble group. When a task has no bubbles there is no need to run a Storyboard.

Responding to User Input An undo operation is performed in response to user input, so the first step is to listen for the appropriate input events. Since there are two ways to tell the game to perform an undo operation, there are two code paths that lead to the undo functionality. BubbleBurstView listens for the Ctrl + Z keystroke and calls Undo on BubbleMatrixViewModel. void HandleMatrixDimensionsAvailable(object sender, EventArgs e) { // Hook the keyboard event on the Window because this // control does not receive keystrokes.

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Advanced MVVM by Josh Smith

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