Browse by Tags

• .NET 3.0
• .net 3.5
• Avalon
• Microsoft
• Programming
• Vista
• WPF
• WPF tools
• wpf/e

• 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

• 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

• WPF Balloon comments :)

  Pavan has a nice post on creating baloon comments. The first thing that comes to mind on seeing the balloon comments is Comics. And guess what! thats exactly what I tried.. and presto You can get the original source code here . It overlooks positioning the arrows coming out of the comment boxes - this is a minor detail and I added a dependency property for this purpose. The update code is attached . As for the usage: < custom:BalloonDecorator Background = "Pink " PointerLength = " 30 " CornerRadius = " 5 " CornerPosition = " Right" .... /> Share this post Read More... Posted Wednesday, July 11, 2007 11:03 AM from Lester's WPF blog | 0 Comments Filed under: WPF, Avalon, Programming, .NET 3.0, WPF samples, Windows Presentation Foundation

• WpfPerf tools now available as a msi

  A couple of weeks ago I had posted an entry about the WPF perf tools being part of the SDK.. One of the readers asked for a separate installable since the SDK is huge and downloading the SDK just for the perf tools really didnt make sense... So we listened, and the WPF perf tools are now available as a separate installable .. Download: x86 and x64 versions Share this post Read More... Posted Tuesday, June 12, 2007 10:32 AM from Lester's WPF blog | 0 Comments Filed under: WPF, Avalon, WPF tools, .NET 3.0, WPF samples, Windows Presentation Foundation

• WPF Blog Writer

  Recently, I was trying my hand at creating a simple blog writer. The writer came out pretty nice. The app makes use of a base richEditor control (thanks to Praj ).. After a bit of tweaking it ended up like the above... So the app just makes a simple call in the xaml <custom:RichEditor/> ...tada ... you have it there!!! The next thing is to write to a blog... In this case, the writer is coded to post the entry on blogger, which makes use of the Google data API .. this could easily be changed for other blogs. It also makes use of a Xaml-HTML converter as the string passed needs to be in HTML. For now, its a blog writer - hence, it onluy writes. But it could easily be extended into a full blown Blog client. Do I hear anyone taking it up :) The code is attached .. so have fun with it .. Share this post Read More... Posted Tuesday, June 05, 2007 3:47 PM from Lester's WPF blog | 0 Comments Filed under: WPF, Avalon, Programming, .NET 3.0, WPF samples, Vista, Windows Presentation Foundation

• Xaml shield image in plain Xaml

  just came across a post which includes xaml to display the xaml shield. That looks sweet.. and all the more when its in Xaml... Xaml code attached Share this post Read More... Posted Wednesday, May 23, 2007 4:56 PM from Lester's WPF blog | 0 Comments Filed under: WPF, Avalon, Programming, .NET 3.0, WPF samples, Windows Presentation Foundation

• Vista style Open/Save FileDialogs

  If you have tried creating FileDialogs in WPF, they usually do not blend well into the Vista look. The solution is to use the wrappers provided in the VistaBridge library which is part of the SDK samples. You could include the library dll (around 100k) in your project and then make the simple call to CommonOpenFileDialog/CommonSaveFileDialog ... The other option being to just include the specific classes in the project. CommonSaveFileDialog saveDialog = new CommonSaveFileDialog (); Its that easy!! Share this post Read More... Posted Monday, May 14, 2007 1:49 PM from Lester's WPF blog | 0 Comments Filed under: WPF, Avalon, Programming, .NET 3.0, WPF samples, Vista, Windows Presentation Foundation

• Xaml FlowDoc to XPS

  Feng Yuan has a nice blog post on how to convert FlowDocuments to an XPS document with the header. The code is in the form of a wrapper class so its gonna be handy. I tried out the code on a RichTextBox and it worked like a charm J I reused one of my old samples and it looks great :) ... The sample code is attached . (PS: Do make a point a read the original post for code specific details) Share this post Read More... Posted Friday, March 30, 2007 11:43 AM from Lester's WPF blog | 0 Comments Filed under: WPF, Avalon, Programming, .NET 3.0, WPF samples, Windows Presentation Foundation

• Sample form using listview

  Recently I was clearing up my documents and I came across this sample I made. Thought it might be useful to someone out there and here it is. It’s basically something like a form but which dynamically grows as and when you fill up the rows. So the typical ‘Add New Row’ button is missing. J … Red (more like pink) rows indicate values being empty; green being obvious. :) .. Typically, you would be using a combobox instead of the textbox. It would result in a better perf experience. The code is simple using a listview which is bound to the data. This might look very familiar to Product Studio if you have used it ;) Code is attached Share this post Read More... Posted Saturday, March 17, 2007 11:43 AM from Lester's WPF blog | 0 Comments Filed under: WPF, Avalon, Programming, .NET 3.0, WPF samples, Windows Presentation Foundation

• BitmapSource-Bitmap interop

  Recently I was trying my hand at a rough image editing scenario and one of the things was changing into gray scale, brightness and so forth. If you have played with .NET 2.0 you get quite a few functions which help in these types of operations and it would be nice shifting Images to Bitmaps and vice versa. As luck would have it, Robert had posted some code on this in the forums. To get the Bitmap you would have to call CopyPixels on the BitmapSource and convert it to a Bitmap- transformedBitmapSource.CopyPixels(bits, stride, 0); unsafe { fixed ( byte * pBits = bits) { IntPtr ptr = new IntPtr (pBits); System.Drawing. Bitmap bitmap = new System.Drawing. Bitmap ( width,height,stride, System.Drawing.Imaging. PixelFormat .Format32bppPArgb,ptr); return bitmap; } } To do the reverse: System.Windows.Media.Imaging. BitmapSource bitmapSource = System.Windows.Interop. Imaging .CreateBitmapSourceFromHBitmap( bitmap.GetHbitmap(), IntPtr .Zero, Int32Rect .Empty, System.Windows.Media.Imaging. BitmapSizeOptions Read More... Posted Thursday, March 08, 2007 11:50 AM from Lester's WPF blog | 0 Comments Filed under: WPF, Avalon, Programming, .NET 3.0, WPF samples, Vista, Windows Presentation Foundation

• Listening to DependencyProperty changes

  Dependency property is a pretty kewl concept. You got to agree on that J . One the nice features is the ability to listen to the changes in these properties and I tend to use it a lot. The SDK way would be to derive from the control, override the dependencyproperty metadata and specify the propertychangedCallback in the signature. Hmmm… pretty cumbersome you would say. public class MyTextBox : TextBox { public MyTextBox(): base () { } static MyTextBox() { FlowDirectionProperty.OverrideMetadata( typeof ( MyTextBox ), new FrameworkPropertyMetadata ( new PropertyChangedCallback (FlowDirectionPropertyChanged))); } private static void FlowDirectionPropertyChanged( DependencyObject sender, DependencyPropertyChangedEventArgs args) { (( MyTextBox )sender).FontWeight = ((( MyTextBox )sender).FlowDirection == FlowDirection .RightToLeft) ? FontWeights .Bold : FontWeights .Normal; } } But hey, things get easy, thanks to Ben . What you can do is use the DependencyPropertyDescriptor. DependencyPropertyDescriptor Read More... Posted Monday, March 05, 2007 11:30 AM from Lester's WPF blog | 0 Comments Filed under: WPF, Avalon, Programming, .NET 3.0, WPF samples, Vista, Windows Presentation Foundation

• Capturing Frame content

  Some time back I got a question about capturing the contents of a frame and it seemed easy, but every time I tried capturing the frame i was getting a blank image. The trick here is that the frame loads the content asynchronously - the simplest thing to do is wait for some time :) ... The frame is an HwndHost that hosts an ActiveX control to load the web content. So the first thing to do is get hold of the HwndHost and then wait for a few seconds and you have it.. for ( Visual v = TheFrame; v != null ; v = VisualTreeHelper .GetChild(v, 0) as Visual ) { hwndHost = v as HwndHost ; if (hwndHost != null ) { break ; } } Now create a DispatcherTimer and wait till it triggers DispatcherTimer timer = new DispatcherTimer (); timer.Tick += TheFrameAfterLoaded; timer.Interval = TimeSpan .FromSeconds(5); timer.Tag = hwndHost; timer.Start(); void TheFrameAfterLoaded( object sender, EventArgs e) { DispatcherTimer timer = sender as DispatcherTimer ; HwndHost hwndHost = ( HwndHost ) timer.Tag; timer.Stop(); Read More... Posted Monday, February 26, 2007 11:31 AM from Lester's WPF blog | 0 Comments Filed under: WPF, Avalon, Programming, .NET 3.0, WPF samples, Windows Presentation Foundation