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• MDI task switching sample

  If you are creating apps which have mdi's (multiple document interfaces) you should definitely take a look at Karls post on MDI task switching. Its an elegant solution and the post explains it nicely ... and yeah you do have the code ...:) .. Take a look Share this post Read More... Posted Monday, April 21, 2008 12:17 PM from Lester's WPF blog | 0 Comments Filed under: WPF, WPF samples, .net 3.5

• Clipping of child elements

  On the forums I saw this interesting problem where there was a need to round the corners of a stackpanel inside a border with cornerradius set... The top is what you get and the bottom image is what you want. The simplest thing to do here is to set the padding on the border so that the stackpanel doesnt bleed around the corners. But when that doesnt meet your requirements you will need to set the clip property on the child in the OnRender function so that you get the correct clipping. The code for the above is attached .(thanks to Ifeanyi) Share this post Read More... Posted Monday, April 07, 2008 11:18 AM from Lester's WPF blog | 0 Comments Filed under: WPF, Avalon, WPF samples, .net 3.5

• Split Button\Menu Item\Automation

  I got a couple of queries from the readers asking if I could provide a slightly non-trivial sample of using automation. So I created a split button user control which looks something like this If there are no items then you get a checkable button. The items are created in a popup and are generated on demand. This makes the automation a bit interesting. As you can see the control supports 3 patterns – · Invoke (for the button) · ExpandCollapse (for the drop down) · Toggle (for the checkable option) – This is just for demo purposes You will need to specify this in the GetPattern function which overrides the one in the base AutomationPeer. The other function that you might want to override is GetChildrenCore in case of popups. The default behavior is to go through the visual tree and get the children. However, popups are in a separate visual tree. The sample overrides the function since the items are displayed as part of a popup J Also for each of the patterns, it is necessary that we implement Read More... Posted Tuesday, March 25, 2008 12:42 PM from Lester's WPF blog | 0 Comments Filed under: WPF, Avalon, .NET 3.0, WPF samples, .net 3.5

• Xbaps using Cookies

  Earlier on I had written an app, BlogPadm which was fulltrust and the writer used Google Data API to write the content to Blogger.com. However, when you create an xbap version of it, a problem arises in that you cannot make WebRequests outside site of origin and hence, the xbap version of the above failed to take off. The workaround is to create a webservice at the site of origin so that the calls are forwarded. However, the focus of this app was to test cookies. So I hosted a blog server and had the blogwriter at the site of origin. So the flow is something like this: http://MainSite/Login.aspx à http://blogsite/blogwriter.xbap à http://blogsite/postentry.aspx The communication between the asp pages and the xbap is through cookies. Code for this application is attached. Note that this project makes use of servers and hence, the app won’t run on execution since the server code is now on the local machine. The Blog engine used is the BlogEngine.net which is an open source blog server. The Read More... Posted Monday, March 10, 2008 2:32 PM from Lester's WPF blog | 0 Comments Filed under: WPF, Avalon, .NET 3.0, WPF samples, .net 3.5

• Drag drop library updated

  The drag drop entry that I had posted has been used by a lot of you guys out there and I have received a lot of suggestions/bugs. I also got a few ready made fixes from you... Thank You :) ... So I finally got down to incorporating all these changes and got the new library up ... One frequent problem was the adorner flickering and this was a result of the adorner being deleted and created ... so thats fixed. There are also some fixes, code moving around and the usual stuff. Hope you find the new library useful :) Library attached Share this post Read More... Posted Tuesday, February 26, 2008 11:19 AM from Lester's WPF blog | 0 Comments Filed under: WPF, WPF samples, Windows Presentation Foundation, .net 3.5

• Maximizing borderless window using SysParameter values

  Earlier on, I had written a post on maximizing a borderless (WindowStyle=None) window but without covering the taskbar. This solution works well but was not that nice to look at implementation wise :) ... However, theres a simplere solution to achieve the same. I get quite a few queries about the previous post, so I thought it would be a good idea to post this simple solution.. < Window Width = " {DynamicResource {x:Static SystemParameters.MaximizedPrimaryScreenWidthKey}} " Height = " {DynamicResource {x:Static SystemParameters.MaximizedPrimaryScreenHeightKey}} " WindowStartupLocation = " CenterScreen " WindowStyle = " None " /> SystemParameters to the rescue... for the code behind version, win.Height = SystemParameters .MaximizedPrimaryScreenHeight; win.Width = SystemParameters .MaximizedPrimaryScreenWidth; win.Top = 0;win.Left = 0; Share this post Read More... Posted Thursday, February 07, 2008 2:06 PM from Lester's WPF blog | 0 Comments Filed under: WPF, .NET 3.0, WPF samples, .net 3.5

• Another MindMapping Tool

  A month ago, I was browsing through different blogs and came across Denis Vuyka's blog post on connecting objects on the canvas... Nice post... Being an avid fan of mind maps, that was the natural extension to the library that he created. Check it out There are 3 types of objects which are basically the same... they contain rich content... Right clicking on the objects opens up an editable Richtextbox... In case you paste in Links, you can click them (Ctrl + Click) ... This opens the link in a new browser window. Maps can be saved/opened. Notice that saving a file also creates a folder with multiple streams. Ideally, everything would be zipped into a single file., I have left this upto you guys :) ... The reason for these multiple streams is the presence of images in Richtextboxes. A simple XamlWriter.Save saves only the image links and not the image. As such, the richtextboxes are saved in the xamlpackage format and picked up on opening the file.... Source code is attached so that you Read More... Posted Thursday, January 24, 2008 11:47 PM from Lester's WPF blog | 0 Comments Filed under: WPF, Avalon, .NET 3.0, WPF samples, .net 3.5

• MindMap app using Hyperbolic tree

  I recently came across a Hyperbolic tree implementation on codeplex using WPF and thought that a nice usage of it could be in writing a mind map creating application.... I tweaked some of the original code and got a tree with editable nodes... Its been laying around for sometime, so I thought it best to put it out there so that you folks can continue its development. Though its not functional in the true sense, it does provide the basic functionality like saving and opening (albeit to the same file)... Currently only the text is serialized... The project (VS 2008) is attached Note that the usage of the Hyperbolic tree and its code is under the Codeplex License terms Share this post Read More... Posted Wednesday, October 31, 2007 11:25 AM from Lester's WPF blog | 0 Comments Filed under: WPF, Avalon, Microsoft, .NET 3.0, WPF samples, Windows Presentation Foundation, .net 3.5

• 3.5 features: Viewport2DVisual3D

  Viewport2DVisual3D .... this new feature makes things a lot easier in the 3D world.. What this enables is putting interactive 2D on 3D. This makes things like having a textbox in 3D a breeze... < Viewport2DVisual3D x:Name = " vp2d_multiple_children " Geometry = " {StaticResource mesh} " > < Viewport2DVisual3D.Material > < DiffuseMaterial Viewport2DVisual3D.IsVisualHostMaterial = " True " Brush = " White " /> </ Viewport2DVisual3D.Material > <TextBox /> </ Viewport2DVisual3D > One other thing is mapping 3D points to 2D is so much more easier... Earlier on I had a post on mapping a mouseclick on a 3d model to a 2d coordinate. This involved using some barycentric coordinates and such... Now all you need is call e.GetPosition(relativeTo) in the mouse event handler... tada!!... your coordinates are ready... so using this new stuff i created a simple app for keeping track of your travels. right clicking on the globe puts a tag on the globe. Clicking on the Read More... Posted Thursday, August 30, 2007 11:09 AM from Lester's WPF blog | 0 Comments Filed under: WPF, Avalon, Programming, Microsoft, .NET 3.0, WPF samples, Windows Presentation Foundation, .net 3.5

• 3.5 features: Addins

  In 3.0, we received a number of queries regarding creating plugins. So in 3.5 we got this in .. :) .. Creating an adding would bsically need the use of 3 dlls - System.Addin, System.Addin.Contract, System.Presentation The basic steps to create the addins involves creating a contract, then create the corresponding views and adapsters for both the host and the addin. So in total you will be creating 5 dlls in addition to the app and the actual addin. Even though this looks a bit overwhelming, its pretty simple. http://blogs.msdn.com/clraddins/ gives more information about creating addins. In order to try out this framework, I added the addin support to blogpad with the host being able to set text in the addins... So the app basically has an addin for a calculator (which can be removed) and an ad at the side... You can try out the code that is attached .. FYI, the ad plugin links to an xbap and this line is commented in code.. You might want to point it to a legit xbap to get this plugin working. Read More... Posted Thursday, August 16, 2007 11:34 AM from Lester's WPF blog | 0 Comments Filed under: WPF, Programming, .NET 3.0, WPF samples, Vista, Windows Presentation Foundation, .net 3.5

• 3.5 Features: Enabled hyperlinks in RichTextBox

  hmmm... that was one often requested feature. So to enable hyperlinks in RichTextBox all that is needed is to set the property IsDocumentEnabled on the RichTextBox. Type the following in XamlPadX and you have the hyperlink navigation working. < RichTextBox IsDocumentEnabled = " True " xmlns = ' http://schemas.microsoft.com/winfx/2006/xaml/presentation ' xmlns:x = ' http://schemas.microsoft.com/winfx/2006/xaml ' > < FlowDocument > < Paragraph > < Hyperlink NavigateUri = " http://club.live.com " > Live Games </ Hyperlink > </ Paragraph > </ FlowDocument > </ RichTextBox > A couple of things to notice here: 1> The Navigation is possible only on a Ctrl Click operation 2> There is no tooltip to indicate that navigation is possible. You could add this to the Hyperlink. A simpler alternative is to just subclass the Hyperlink and add the tooltip in the constructor public class MyHyperlink : Hyperlink { public MyHyperlink() { this .ToolTip = Read More... Posted Thursday, August 09, 2007 11:43 AM from Lester's WPF blog | 0 Comments Filed under: WPF, Avalon, Microsoft, .NET 3.0, WPF samples, Windows Presentation Foundation, .net 3.5