https://www.infragistics.com/community/product_platforms/silverlight/en-USTelligent Community 10 Non-Productionhttps://www.infragistics.com/community/product_platforms/silverlight/w/silverlight-wiki/56/extension-methods-for-navigating-the-xamdatachartWed, 20 Feb 2019 17:37:00 GMT7a8b7c76-b7ad-48e0-9694-5b04ca132ed0:dd7518db-75a2-4a6c-ad3a-d2cd46d5413dJason ZajacI recently posted a video demonstrating how to implement some extension methods to support xamDataChart navigation. The navigation support implemented in the demo included: PanUp PanDown PanLeft PanRight ZoomIn ZoomOut FitInWindow The only problem with the code I used in the video, was that the event handler for the buttons included a long if statement to handle navigation support. As the famous quote goes, “If it smells, it’s bad code”, so I wanted to refactor the implementation to be a bit more maintainable. Before I get into the changes, I first want to list the extension methods that I implemented in order to make it easy to pan and zoom the chart. Notice that the methods us a default scale value so you are not required to pass in a scale amount for each method call. public static class xamDataChartExtensions { private static double _defaultScale = 0.05; public static void ZoomIn(this XamDataChart dataChart) { ZoomIn(dataChart, _defaultScale); } public static void ZoomIn(this XamDataChart dataChart, double scale) { dataChart.WindowScaleHorizontal -= scale; dataChart.WindowScaleVertical -= scale; } public static void ZoomOut(this XamDataChart dataChart) { ZoomOut(dataChart, _defaultScale); } public static void ZoomOut(this XamDataChart dataChart, double scale) { dataChart.WindowScaleHorizontal += scale; dataChart.WindowScaleVertical += scale; } public static void PanUp(this XamDataChart dataChart) { PanUp(dataChart, _defaultScale); } public static void PanUp(this XamDataChart dataChart, double scale) { dataChart.WindowPositionVertical -= scale; } public static void PanDown(this XamDataChart dataChart) { PanDown(dataChart, _defaultScale); } public static void PanDown(this XamDataChart dataChart, double scale) { dataChart.WindowPositionVertical += scale; } public static void PanLeft(this XamDataChart dataChart) { PanLeft(dataChart, _defaultScale); } public static void PanLeft(this XamDataChart dataChart, double scale) { dataChart.WindowPositionHorizontal -= scale; } public static void PanRight(this XamDataChart dataChart) { PanRight(dataChart, _defaultScale); } public static void PanRight(this XamDataChart dataChart, double scale) { dataChart.WindowPositionHorizontal += scale; } The previous code I implemented featured a nested if statement that would call the appropriate extension method, but I knew there was an easy way to clean this code out of the page. The key to a more concise approach begins by defining a enumeration which lists the navigation options: public enum xamDataChartNavigationTypes { PanUp, PanDown, PanLeft, PanRight, ZoomIn, ZoomOut, FitInWindow, Undefined } Now armed with the navigation enumeration I added another extension method named Navigate which takes an instance of the navigation enumeration and an option to pass an explicit scale value: public static void Navigate(this XamDataChart dataChart, xamDataChartNavigationTypes navigationType) { Navigate(dataChart, navigationType, _defaultScale); } public static void Navigate(this XamDataChart dataChart, xamDataChartNavigationTypes navigationType, double scale) { switch (navigationType) { case xamDataChartNavigationTypes.FitInWindow: dataChart.WindowRect = new Rect(0, 0, 1, 1); break; case xamDataChartNavigationTypes.PanUp: dataChart.PanUp(scale); break; case xamDataChartNavigationTypes.PanDown: dataChart.PanDown(scale); break; case xamDataChartNavigationTypes.PanLeft: dataChart.PanLeft(scale); break; case xamDataChartNavigationTypes.PanRight: dataChart.PanRight(scale); break; case xamDataChartNavigationTypes.ZoomIn: dataChart.ZoomIn(scale); break; case xamDataChartNavigationTypes.ZoomOut: dataChart.ZoomOut(scale); break; default: break; } } Now as long at the Tag property of your button is equal to one of the navigation enumeration values (ex: PanUp, PanDown, etc), then the click handler is reduced to the following: private void Navigate_Click(object sender, RoutedEventArgs e) { string tag = (sender as Button).Tag.ToString(); xamDataChartNavigationTypes navigationType; if (xamDataChartNavigationTypes.TryParse(tag, out navigationType)) { this.dataChart.Navigate(navigationType); } }Data Visualization2010.2XamDataCharthttps://www.infragistics.com/community/product_platforms/silverlight/w/silverlight-wikiFri, 01 Dec 2017 07:35:00 GMT7a8b7c76-b7ad-48e0-9694-5b04ca132ed0:8a0b55a2-44c3-4d09-b482-60ea6ae039b3Anonymoushttps://www.infragistics.com/community/product_platforms/silverlight/w/silverlight-wiki/59/building-the-omovies-browser-netflix-odata-using-infragistics-netadvantage-silverlight-controls?CommentId=95f78ebd-c6da-4157-bd3d-546d8f4d1be8Sun, 17 Jun 2012 23:27:00 GMT7a8b7c76-b7ad-48e0-9694-5b04ca132ed0:95f78ebd-c6da-4157-bd3d-546d8f4d1be8huangThank you very much for you can share your post,the article content written very well, writes fluent,extremely is worth my study www.pandawill.com/.../card-reader.htmlhttps://www.infragistics.com/community/product_platforms/silverlight/w/silverlight-wiki/54/styling-the-xamwebgrid-group-by-area?CommentId=4407029f-243b-47d4-a6e7-374141507034Sun, 17 Jun 2012 23:27:00 GMT7a8b7c76-b7ad-48e0-9694-5b04ca132ed0:4407029f-243b-47d4-a6e7-374141507034huangThank you very much for you can share your post,the article content written very well, writes fluent,extremely is worth my 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