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KeyBoard navigation on RowHeades in LaneGrid (Read 2674 times)

priyanka Junior Member Offline I love YaBB 1G - SP1! Posts: 56 Joined: Sep 2^nd, 2009	KeyBoard navigation on RowHeades in LaneGrid Sep 2^nd, 2009 at 5:46am	Print Post
	Hi, I am working with LaneGrid and I need to navigate on the rowHeaders with keyboard. Is this feature supported..??? If so...then: 1.) How can I do this and also need to show the Header focused when the keyboard selection is on the header. 2.)How can I get the current selected header(selected through keyboard) in the code. It will be great if you provide some sample code. Thanks.. Priyanka


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Stoyo God Member Offline MindFusion support Posts: 13230 Joined: Jul 20^th, 2005	Re: KeyBoard navigation on RowHeades in LaneGrid Reply #1 - Sep 2^nd, 2009 at 7:20am	Print Post
	Hi, That's shown in this example: https://www.mindfusion.eu/_samples/HeaderFocus.zip You should also use the assembly we sent you some time ago that fixed the cell style auto-refresh bug. I hope that helps, Stoyan


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priyanka Junior Member Offline I love YaBB 1G - SP1! Posts: 56 Joined: Sep 2^nd, 2009	Re: KeyBoard navigation on RowHeades in LaneGrid Reply #2 - Sep 3^rd, 2009 at 5:02am	Print Post
	Hi, Thanks for your reply. But is there some other way for getting the rowHeader. As I am having the headers hierarchy upto 2 levels(i.e. RowHeaders and its SubHeaders.) and i'll be needing the RowHeaders and not the subHeaders, but the grid.GetRowIndex will always provide me (-1) for the RowHeaders. 1.) So is there any alternate way to get the topmost RowHeaders in the RowHeaders Hierarcy. 2.) Or is there any way of getting the index of Parent Header from subHeader. Thanks, Priyanka


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Meppy God Member Offline MindFusion support Posts: 1783 Joined: Jul 20^th, 2005	Re: KeyBoard navigation on RowHeades in LaneGrid Reply #3 - Sep 3^rd, 2009 at 10:26am	Print Post
	Hi, 1) You can get the top-level headers from the RowHeaders and ColumnHeaders properties of the Grid class. 2) There is currently no way to obtain the parent of a subheader unless you traverse the whole hierarchy recursively, which might be slow. As outlined in the documentation Grid.GetRowIndex and Grid.GetColumnIndex only work for bottommost headers. Regards, Meppy


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priyanka Junior Member Offline I love YaBB 1G - SP1! Posts: 56 Joined: Sep 2^nd, 2009	Re: KeyBoard navigation on RowHeades in LaneGrid Reply #4 - Oct 30^th, 2009 at 6:22am	Print Post
	Hi, I was using version 2.1.1 of MindfusionDiagram and was using the LaneDiagram of the Diagram. When I upgraded to the newer version 2.2.1 my application threw an exception and the application crashed. I tried to reproduce the same in sample application but due to time constraints I was not able to reproduce it. The following is the exception which i got. Quote: -------------------------------------- DateTime: 10/30/2009 11:38:54 AM Exception: Value cannot be null. Parameter name: textToFormat Stack Trace: at System.Windows.Media.FormattedText..ctor(String textToFormat, CultureInfo culture, FlowDirection flowDirection, Typeface typeface, Double emSize, Brush foreground, NumberSubstitution numberSubstitution) at System.Windows.Media.FormattedText..ctor(String textToFormat, CultureInfo culture, FlowDirection flowDirection, Typeface typeface, Double emSize, Brush foreground) at MindFusion.x09d6340d05b7af69.xaab109ce2050e76a(String xb41faee6912a2313, Font x26094932cf7a9139, Brush xd8f1949f8950238a, Size xd795812a0a73a33b, StringFormat x89ac3f1d7b03605d) at MindFusion.x09d6340d05b7af69.x9609f90f13149bac(DrawingContext x41347a961b838962, String xb41faee6912a2313, Font x26094932cf7a9139, Brush xd8f1949f8950238a, Rect xd795812a0a73a33b, StringFormat x89ac3f1d7b03605d) at MindFusion.Diagramming.Wpf.Lanes.Grid.x6f527739acb8e9eb(Header x6b0ad9f73c48ad53, Rect xda73fcb97c77d998, Object x70bb49687dfea062) at MindFusion.Diagramming.Wpf.Lanes.Grid.x055bf12d5ead37b4(x9a6028c0a8f4ef4a x7d1bf994956f1081, Double x27d9e9f754a77a2c, Double xe44fb7dc05e0221a, Object x70bb49687dfea062) at MindFusion.Diagramming.Wpf.Lanes.Grid.x5fae5426891c7f2a(DrawingContext x41347a961b838962) at MindFusion.Diagramming.Wpf.Lanes.Grid.x7f078bc29923174b(DrawingContext x41347a961b838962) at MindFusion.Diagramming.Wpf.Lanes.xe0c0814411a0d057.OnRender(DrawingContext drawingContext) at System.Windows.UIElement.Arrange(Rect finalRect) at System.Windows.ContextLayoutManager.UpdateLayout() at System.Windows.ContextLayoutManager.UpdateLayoutCallback(Object arg) at System.Windows.Media.MediaContext.InvokeOnRenderCallback.DoWork() at System.Windows.Media.MediaContext.FireInvokeOnRenderCallbacks() at System.Windows.Media.MediaContext.RenderMessageHandlerCore(Object resizedCompositionTarget) at System.Windows.Media.MediaContext.RenderMessageHandler(Object resizedCompositionTarget) at System.Windows.Threading.ExceptionWrapper.InternalRealCall(Delegate callback, Object args, Boolean isSingleParameter) at System.Windows.Threading.ExceptionWrapper.TryCatchWhen(Object source, Delegate callback, Object args, Boolean isSingleParameter, Delegate catchHandler) Exception Source: PresentationCore InnerException: -------------------------------------- Please provide some pointers to solve the problem. Thanks, Priyanka


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Meppy God Member Offline MindFusion support Posts: 1783 Joined: Jul 20^th, 2005	Re: KeyBoard navigation on RowHeades in LaneGrid Reply #5 - Oct 30^th, 2009 at 8:49am	Print Post
	Do you set the Title property of any of the lane headers to null? If this is the case, you can try setting it to an empty string instead. Regards, Meppy


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