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  • GWT : Composite not displaying

    - by animatrix30
    I have a this code for the layout : grid = new Grid(15, 15); tiles = new Tile[15][15]; for (int i = 0; i != 15; i++) { for (int j = 0; j != 15; j++) { tiles[i][j] = new Tile('a'); grid.setWidget(i, j, tiles[i][j]); tiles[i][j].setVisible(true); } } initWidget(grid); I know it is working, because if I change the tile, by a Button, it works well. Now my Tile class : public class Tile extends Composite { char character; public Tile (Character c) { this.character = c; buildWidget(); } private void buildWidget() { Label l = new Label(this.character+""); initWidget(l); } Why does all tiles are not displayed ? Thanks for your help !

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  • Grid View selected index

    - by user2924573
    I have a grid which contains a edit button . When i click the edit button and debug it does not hit to the selected index change event . There are no build errors code behind the grid public void btnModemDetailsEdit_Click(object sender, EventArgs e) { isEdit = true; } protected void gridModemDetails_SelectedIndexChanged(object sender, EventArgs e) { int id = Convert.ToInt32(GridModemDetails.DataKeys[GridModemDetails.SelectedIndex].Values["gridModemDetails_SelectedIndexChanged"].ToString()); } <asp:GridView ID="GridModemDetails" runat="server" Width="435px" DataKeyNames="ModemId" AllowPaging="True" OnSelectedIndexChanged="gridModemDetails_SelectedIndexChanged" AutoGenerateColumns="False"> <Columns> <asp:TemplateField HeaderText="Edit" Visible="True" > <ItemTemplate> <asp:LinkButton ID="btnModemDetailsEdit" AccessibleHeaderText="Edit" ButtonType="Button" Text="Edit" HeaderText="Edit" runat="server" OnClick="btnModemDetailsEdit_Click" runat="server"/> </ItemTemplate> </asp:TemplateField>

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  • Guest Post: Using IronRuby and .NET to produce the &lsquo;Hello World of WPF&rsquo;

    - by Eric Nelson
    [You might want to also read other GuestPosts on my blog – or contribute one?] On the 26th and 27th of March (2010) myself and Edd Morgan of Microsoft will be popping along to the Scottish Ruby Conference. I dabble with Ruby and I am a huge fan whilst Edd is a “proper Ruby developer”. Hence I asked Edd if he was interested in creating a guest post or two for my blog on IronRuby. This is the second of those posts. If you should stumble across this post and happen to be attending the Scottish Ruby Conference, then please do keep a look out for myself and Edd. We would both love to chat about all things Ruby and IronRuby. And… we should have (if Amazon is kind) a few books on IronRuby with us at the conference which will need to find a good home. This is me and Edd and … the book: Order on Amazon: http://bit.ly/ironrubyunleashed Using IronRuby and .NET to produce the ‘Hello World of WPF’ In my previous post I introduced, to a minor extent, IronRuby. I expanded a little on the basics of by getting a Rails app up-and-running on this .NET implementation of the Ruby language — but there wasn't much to it! So now I would like to go from simply running a pre-existing project under IronRuby to developing a whole new application demonstrating the seamless interoperability between IronRuby and .NET. In particular, we'll be using WPF (Windows Presentation Foundation) — the component of the .NET Framework stack used to create rich media and graphical interfaces. Foundations of WPF To reiterate, WPF is the engine in the .NET Framework responsible for rendering rich user interfaces and other media. It's not the only collection of libraries in the framework with the power to do this — Windows Forms does the trick, too — but it is the most powerful and flexible. Put simply, WPF really excels when you need to employ eye candy. It's all about creating impact. Whether you're presenting a document, video, a data entry form, some kind of data visualisation (which I am most hopeful for, especially in terms of IronRuby - more on that later) or chaining all of the above with some flashy animations, you're likely to find that WPF gives you the most power when developing any of these for a Windows target. Let's demonstrate this with an example. I give you what I like to consider the 'hello, world' of WPF applications: the analogue clock. Today, over my lunch break, I created a WPF-based analogue clock using IronRuby... Any normal person would have just looked at their watch. - Twitter The Sample Application: Click here to see this sample in full on GitHub. Using Windows Presentation Foundation from IronRuby to create a Clock class Invoking the Clock class   Gives you The above is by no means perfect (it was a lunch break), but I think it does the job of illustrating IronRuby's interoperability with WPF using a familiar data visualisation. I'm sure you'll want to dissect the code yourself, but allow me to step through the important bits. (By the way, feel free to run this through ir first to see what actually happens). Now we're using IronRuby - unlike my previous post where we took pure Ruby code and ran it through ir, the IronRuby interpreter, to demonstrate compatibility. The main thing of note is the very distinct parallels between .NET namespaces and Ruby modules, .NET classes and Ruby classes. I guess there's not much to say about it other than at this point, you may as well be working with a purely Ruby graphics-drawing library. You're instantiating .NET objects, but you're doing it with the standard Ruby .new method you know from Ruby as Object#new — although, the root object of all your IronRuby objects isn't actually Object, it's System.Object. You're calling methods on these objects (and classes, for example in the call to System.Windows.Controls.Canvas.SetZIndex()) using the underscored, lowercase convention established for the Ruby language. The integration is so seamless. The fact that you're using a dynamic language on top of .NET's CLR is completely abstracted from you, allowing you to just build your software. A Brief Note on Events Events are a big part of developing client applications in .NET as well as under every other environment I can think of. In case you aren't aware, event-driven programming is essentially the practice of telling your code to call a particular method, or other chunk of code (a delegate) when something happens at an unpredictable time. You can never predict when a user is going to click a button, move their mouse or perform any other kind of input, so the advent of the GUI is what necessitated event-driven programming. This is where one of my favourite aspects of the Ruby language, blocks, can really help us. In traditional C#, for instance, you may subscribe to an event (assign a block of code to execute when an event occurs) in one of two ways: by passing a reference to a named method, or by providing an anonymous code block. You'd be right for seeing the parallel here with Ruby's concept of blocks, Procs and lambdas. As demonstrated at the very end of this rather basic script, we are using .NET's System.Timers.Timer to (attempt to) update the clock every second (I know it's probably not the best way of doing this, but for example's sake). Note: Diverting a little from what I said above, the ticking of a clock is very predictable, yet we still use the event our Timer throws to do this updating as one of many ways to perform that task outside of the main thread. You'll see that all that's needed to assign a block of code to be triggered on an event is to provide that block to the method of the name of the event as it is known to the CLR. This drawback to this is that it only allows the delegation of one code block to each event. You may use the add method to subscribe multiple handlers to that event - pushing that to the end of a queue. Like so: def tick puts "tick tock" end timer.elapsed.add method(:tick) timer.elapsed.add proc { puts "tick tock" } tick_handler = lambda { puts "tick tock" } timer.elapsed.add(tick_handler)   The ability to just provide a block of code as an event handler helps IronRuby towards that very important term I keep throwing around; low ceremony. Anonymous methods are, of course, available in other more conventional .NET languages such as C# and VB but, as usual, feel ever so much more elegant and natural in IronRuby. Note: Whether it's a named method or an anonymous chunk o' code, the block you delegate to the handling of an event can take arguments - commonly, a sender object and some args. Another Brief Note on Verbosity Personally, I don't mind verbose chaining of references in my code as long as it doesn't interfere with performance - as evidenced in the example above. While I love clean code, there's a certain feeling of safety that comes with the terse explicitness of long-winded addressing and the describing of objects as opposed to ambiguity (not unlike this sentence). However, when working with IronRuby, even I grow tired of typing System::Whatever::Something. Some people enjoy simply assuming namespaces and forgetting about them, regardless of the language they're using. Don't worry, IronRuby has you covered. It is completely possible to, with a call to include, bring the contents of a .NET-converted module into context of your IronRuby code - just as you would if you wanted to bring in an 'organic' Ruby module. To refactor the style of the above example, I could place the following at the top of my Clock class: class Clock include System::Windows::Shape include System::Windows::Media include System::Windows::Threading # and so on...   And by doing so, reduce calls to System::Windows::Shapes::Ellipse.new to simply Ellipse.new or references to System::Windows::Threading::DispatcherPriority.Render to a friendlier DispatcherPriority.Render. Conclusion I hope by now you can understand better how IronRuby interoperates with .NET and how you can harness the power of the .NET framework with the dynamic nature and elegant idioms of the Ruby language. The manner and parlance of Ruby that makes it a joy to work with sets of data is, of course, present in IronRuby — couple that with WPF's capability to produce great graphics quickly and easily, and I hope you can visualise the possibilities of data visualisation using these two things. Using IronRuby and WPF together to create visual representations of data and infographics is very exciting to me. Although today, with this project, we're only presenting one simple piece of information - the time - the potential is much grander. My day-to-day job is centred around software development and UI design, specifically in the realm of healthcare, and if you were to pay a visit to our office you would behold, directly above my desk, a large plasma TV with a constantly rotating, animated slideshow of charts and infographics to help members of our team do their jobs. It's an app powered by WPF which never fails to spark some conversation with visitors whose gaze has been hooked. If only it was written in IronRuby, the pleasantly low ceremony and reduced pre-processing time for my brain would have helped greatly. Edd Morgan blog Related Links: Getting PhP and Ruby working on Windows Azure and SQL Azure

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  • Exporting WPF DataGrid to a text file in a nice looking format. Text file must be easy to read.

    - by Andrew
    Hi, Is there a simple way to export a WPF DataGrid to a text file and a .csv file? I've done some searching and can't see that there is a simple DataGrid method to do so. I have got something working (barely) by making use of the ItemsSource of the DataGrid. In my case, this is an array of structs. I do something with StreamWriters and StringBuilders (details available) and basically have: StringBuilder destination = new StringBuilder(); destination.Append(row.CreationDate); destination.Append(seperator); // seperator is '\t' or ',' for csv file destination.Append(row.ProcId); destination.Append(seperator); destination.Append(row.PartNumber); destination.Append(seperator); I do this for each struct in the array (in a loop). This works fine. The problem is that it's not easy to read the text file. The data can be of different lengths within the same column. I'd like to see something like: 2007-03-03 234238423823 823829923 2007-03-03 66 99 And of course, I get something like: 2007-03-03 234238423823 823829923 2007-03-03 66 99 It's not surprising giving that I'm using Tab delimiters, but I hope to do better. It certainly is easy to read in the DataGrid! I could of course have some logic to pad short values with spaces, but that seems quite messy. I thought there might be a better way. I also have a feeling that this is a common problem and one that has probably been solved before (hopefully within the .NET classes themselves). Thanks.

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  • How to take screenshots of WPF applications in correct size and content

    - by Thomas W.
    I usually take screenshots of single windows via the built-in key combination Alt+Print. Unfortunately this does not work well for more and more applications - all of them are WPF applications. Usually the screen shots have at least one of the following properties: the screenshot is larger than expected and contains parts of the screen around the actual window the screenshot has the correct size but includes parts of other windows, e.g. the Windows task bar. Of course the task bar might be in front of the window, but taking screen shots of "normal" programs works fine. How do I take screenshots of WPF application which are correct in size and content? I'd like to avoid the extra effort of checking all the screenshots for correctness, reproducing the situation, taking them again in case of issues or repairing/faking them manually in any pixel manipulation program (e.g. Paint.NET). I observe this on Windows 7 x64 SP 1, all official updates installed, but it might apply to other Windows versions as well (not tested yet). .NET 4.5 is installed. The application itself might only need the built-in .NET 3.5.1. It's reproducible on a virtual machine with the same settings. Examples: Screenshot of an application running in maximized mode. The screen shot includes parts of the task bar. Screenshot of a progress dialog which is behind the task bar. The screenshot also includes the task bar, while it doesn't for non WPF applications.

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  • Creating a grid overlay over image.

    - by neteus
    Hi everybody, I made a script (using mootools library) that is supposed to overlay an image with a table grid and when each grid cell is clicked/dragged over its background color changes 'highlighting' the cell. Current code creates a table and positions it over the element (el, image in this case). Table was used since I am planning to add rectangle select tool later on, and it seemed easiest way to do it. <html> <head> <title></title> <script type="text/javascript" src="mootools.js"></script> <script type="text/javascript"> var SetGrid = function(el, sz, nr, nc){ //get number of rows/columns according to the 'grid' size numcols = el.getSize().x/sz; numrows = el.getSize().y/sz; //create table element for injecting cols/rows var gridTable = new Element('table', { 'id' : 'gridTable', 'styles' : { 'width' : el.getSize().x, 'height' : el.getSize().y, 'top' : el.getCoordinates().top, 'left' : el.getCoordinates().left } }); //inject rows/cols into gridTable for (row = 1; row<=numrows; row++){ thisRow = new Element('tr', { 'id' : row, 'class' : 'gridRow' }); for(col = 1; col<=numcols; col++){ thisCol = new Element('td', { 'id' : col, 'class' : 'gridCol0' }); //each cell gets down/up over event... down starts dragging|up stops|over draws area if down was fired thisCol.addEvents({ 'mousedown' : function(){ dragFlag = true; startRow = this.getParent().get('id'); startCol = this.get('id'); }, 'mouseup' : function(){ dragFlag = false; }, 'mouseover' : function(){ if (dragFlag==true){ this.set('class', 'gridCol'+$$('#lvlSelect .on').get('value')); } }, 'click' : function(){ //this.set('class', 'gridCol'+$$('#lvlSelect .on').get('id').substr(3, 1) ); str = $$('#lvlSelect .on').get('id'); alert(str.substr(2, 3)); } }); thisCol.inject(thisRow, 'bottom'); }; thisRow.inject(gridTable, 'bottom'); }; gridTable.inject(el.getParent()); } //sens level selector func var SetSensitivitySelector = function(el, sz, nr, nc){ $$('#lvlSelect ul li').each(function(el){ el.addEvents({ 'click' : function(){ $$('#lvlSelect ul li').set('class', ''); this.set('class', 'on'); }, 'mouseover' : function(){ el.setStyle('cursor','pointer'); }, 'mouseout' : function(){ el.setStyle('cursor',''); } }); }); } //execute window.addEvent('load', function(){ SetGrid($('imagetomap'), 32); SetSensitivitySelector(); }); </script> <style> #imagetomapdiv { float:left; display: block; } #gridTable { border:1px solid red; border-collapse:collapse; position:absolute; z-index:5; } #gridTable td { opacity:0.2; filter:alpha(opacity=20); } #gridTable .gridCol0 { border:1px solid gray; background-color: none; } #gridTable .gridCol1 { border:1px solid gray; background-color: green; } #gridTable .gridCol2 { border:1px solid gray; background-color: blue; } #gridTable .gridCol3 { border:1px solid gray; background-color: yellow; } #gridTable .gridCol4 { border:1px solid gray; background-color: orange; } #gridTable .gridCol5 { border:1px solid gray; background-color: red; } #lvlSelect ul {float: left; display:block; position:relative; margin-left: 20px; padding: 10px; } #lvlSelect ul li { width:40px; text-align:center; display:block; border:1px solid black; position:relative; padding: 10px; list-style:none; opacity:0.2; filter:alpha(opacity=20); } #lvlSelect ul li.on { opacity:1; filter:alpha(opacity=100); } #lvlSelect ul #li0 { background-color: none; } #lvlSelect ul #li1 { background-color: green; } #lvlSelect ul #li2 { background-color: blue; } #lvlSelect ul #li3 { background-color: yellow; } #lvlSelect ul #li4 { background-color: orange; } #lvlSelect ul #li5 { background-color: red; } </style> </head> <body> <div id="imagetomapdiv"> <img id="imagetomap" src="1.png"> </div> <div id="lvlSelect"> <ul> <li value="0" id="li0">0</li> <li value="1" id="li1">1</li> <li value="2" id="li2">2</li> <li value="3" id="li3">3</li> <li value="4" id="li4">4</li> <li value="5" id="li5" class="on">5</li> </ul> </div> </body> </html> A 'working' example: http://72.14.186.218/~alex/motion.php There are two problems: while it works just fine in FF, IE and Chrome do not create the table if the page is refreshed. If you go back to directory root and click on the link to the file the grid table is displayed, if you hit 'refresh' button -- the script runs but the table is not injected. Secondly, although the table HTML is injected in IE, it does not display it. I tried adding nbsp's to make sure its not ignored -- to no avail. Any suggestions on improving code or help with the issues is appreciated. Thanks!

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  • Silverlight: Scrolling with a StackPanel

    - by programatique
    I have a grid, 3 by 3 (3 rowdefinitions and 3 columndefinitions). I want some content (a StackPanel) in one of those grid cells to scroll. I'm fairly sure this is possible but I cannot figure out how. I've tried adding ScrollViewers and Scrollbar controls to the grid cell I want to scroll, but this usually ends up creating scrolling for the entire page. Edit: My issue is more specificlly how I can get scrolling over a StackPanel. An example if the issue I am having is here: <Grid x:Name="LayoutRoot"> <Grid.ColumnDefinitions> <ColumnDefinition/> <ColumnDefinition/> </Grid.ColumnDefinitions> <Grid.RowDefinitions> <RowDefinition/> <RowDefinition/> </Grid.RowDefinitions> <Grid> <TextBlock FontSize="16">1,1</TextBlock> </Grid> <Grid Grid.Column="1"> <TextBlock FontSize="16">1,2</TextBlock> </Grid> <Grid Grid.Row="1"> <TextBlock FontSize="16">2,1</TextBlock> </Grid> <Grid Grid.Column="1" Grid.Row="1"> <StackPanel> <TextBlock>Title</TextBlock> <Grid> <ScrollViewer> <StackPanel> <TextBlock FontSize="32">2,2</TextBlock> <TextBlock FontSize="32">2,2</TextBlock> <TextBlock FontSize="32">2,2</TextBlock> <TextBlock FontSize="32">2,2</TextBlock> <TextBlock FontSize="32">2,2</TextBlock> <TextBlock FontSize="32">2,2</TextBlock> <TextBlock FontSize="32">2,2</TextBlock> <TextBlock FontSize="32">2,2</TextBlock> <TextBlock FontSize="32">2,2</TextBlock> <TextBlock FontSize="32">2,2</TextBlock> <TextBlock FontSize="32">2,2</TextBlock> <TextBlock FontSize="32">2,2</TextBlock> <TextBlock FontSize="32">2,2</TextBlock> <TextBlock FontSize="32">2,2</TextBlock> </StackPanel> </ScrollViewer> </Grid> </StackPanel> </Grid> </Grid>

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  • WPF - List View Row Index and Validation

    - by abhishek
    Hi, I have a ListView with TextBoxes in second column. I want to validate that my text box does not contain a number if the third column(data_type) is "Text". I am unable to do the validation. I tried a few approaches. In one approach I try to handle the MouseDown event and am trying to get the Row number so that I can get the data_type value of that row. I want to us this value in the Validate method. I have been struggling for a week now. Would appreciate if anybody could help. <ControlTemplate x:Key="validationTemplate"> <DockPanel> <TextBlock Foreground="Red" FontSize="20">!</TextBlock> <AdornedElementPlaceholder/> </DockPanel> </ControlTemplate> <Style x:Key="textBoxInError" TargetType="{x:Type TextBox}"> <Style.Triggers> <Trigger Property="Validation.HasError" Value="true"> <Setter Property="ToolTip" Value="{Binding RelativeSource={x:Static RelativeSource.Self}, Path=(Validation.Errors)[0].ErrorContent}"/> </Trigger> </Style.Triggers> </Style> <DataTemplate x:Key="textTemplate"> <TextBox HorizontalAlignment= "Stretch" IsEnabled="{Binding XPath=./@isenabled}" Validation.ErrorTemplate="{StaticResource validationTemplate}" Style="{StaticResource textBoxInError}"> <TextBox.Text> <Binding XPath="./@value" UpdateSourceTrigger="PropertyChanged"> <Binding.ValidationRules> <local:TextBoxMinMaxValidation> <local:TextBoxMinMaxValidation.DataType> <local:DataTypeCheck Datatype="{Binding Source={StaticResource dataProvider}, XPath='/[@id=CustomerServiceQueueName]'}"/> </local:TextBoxMinMaxValidation.DataType> <local:TextBoxMinMaxValidation.ValidRange> <local:Int32RangeChecker Minimum="{Binding Source={StaticResource dataProvider}, XPath=./@min}" Maximum="{Binding Source={StaticResource dataProvider}, XPath=./@max}"/> </local:TextBoxMinMaxValidation.ValidRange> </local:TextBoxMinMaxValidation> </Binding.ValidationRules> </Binding > </TextBox.Text> </TextBox> </DataTemplate> <DataTemplate x:Key="dropDownTemplate"> <ComboBox Name="cmbBox" HorizontalAlignment="Stretch" SelectedIndex="{Binding XPath=./@value}" ItemsSource="{Binding XPath=.//OPTION/@value}" IsEnabled="{Binding XPath=./@isenabled}" /> </DataTemplate> <DataTemplate x:Key="booldropDownTemplate"> <ComboBox Name="cmbBox" HorizontalAlignment="Stretch" SelectedIndex="{Binding XPath=./@value, Converter={StaticResource boolconvert}}"> <ComboBoxItem>True</ComboBoxItem> <ComboBoxItem>False</ComboBoxItem> </ComboBox> </DataTemplate> <local:ControlTemplateSelector x:Key="myControlTemplateSelector"/> <Style x:Key="StretchedContainerStyle" TargetType="{x:Type ListViewItem}"> <Setter Property="HorizontalContentAlignment" Value="Stretch" /> <Setter Property="Template" Value="{DynamicResource ListBoxItemControlTemplate1}"/> </Style> <ControlTemplate x:Key="ListBoxItemControlTemplate1" TargetType="{x:Type ListBoxItem}"> <Border SnapsToDevicePixels="true" x:Name="Bd" Background="{TemplateBinding Background}" BorderBrush="{DynamicResource {x:Static SystemColors.ActiveBorderBrushKey}}" Padding="{TemplateBinding Padding}" BorderThickness="0,0.5,0,0.5"> <GridViewRowPresenter SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}" VerticalAlignment="{TemplateBinding VerticalContentAlignment}"/> </Border> </ControlTemplate> <Style x:Key="CustomHeaderStyle" TargetType="{x:Type GridViewColumnHeader}"> <Setter Property="Background" Value="LightGray" /> <Setter Property="FontWeight" Value="Bold"/> <Setter Property="FontFamily" Value="Arial"/> <Setter Property="HorizontalContentAlignment" Value="Left" /> <Setter Property="Padding" Value="2,0,2,0"/> </Style> </UserControl.Resources> <Grid x:Name="GridViewControl" Height="Auto"> <Grid.RowDefinitions> <RowDefinition Height="*" /> <RowDefinition Height="34"/> </Grid.RowDefinitions> <ListView x:Name="ListViewControl" Grid.Row="0" ItemContainerStyle="{DynamicResource StretchedContainerStyle}" ItemTemplateSelector="{DynamicResource myControlTemplateSelector}" IsSynchronizedWithCurrentItem="True" ItemsSource="{Binding Source={StaticResource dataProvider}, XPath=//CONFIGURATION}"> <ListView.View > <GridView > <GridViewColumn Header="ID" HeaderContainerStyle="{StaticResource CustomHeaderStyle}" DisplayMemberBinding="{Binding XPath=./@id}"/> <GridViewColumn Header="VALUE" HeaderContainerStyle="{StaticResource CustomHeaderStyle}" CellTemplateSelector="{DynamicResource myControlTemplateSelector}" /> <GridViewColumn Header="DATATYPE" HeaderContainerStyle="{StaticResource CustomHeaderStyle}" DisplayMemberBinding="{Binding XPath=./@data_type}"/> <GridViewColumn Header="DESCRIPTION" HeaderContainerStyle="{StaticResource CustomHeaderStyle}" DisplayMemberBinding="{Binding XPath=./@description}" Width="{Binding ElementName=ListViewControl, Path=ActualWidth}"/> </GridView> </ListView.View> </ListView> <StackPanel Grid.Row="1"> <Button Grid.Row="1" HorizontalAlignment="Stretch" Height="34" HorizontalContentAlignment="Stretch" > <StackPanel HorizontalAlignment="Stretch" VerticalAlignment="Center" Orientation="Horizontal" FlowDirection="RightToLeft" Height="30"> <Button Grid.Row="1" Content ="Apply" Padding="0,0,0,0 " Margin="6,2,0,2" Name="btn_Apply" HorizontalAlignment="Right" VerticalContentAlignment="Center" HorizontalContentAlignment="Center" Width="132" IsTabStop="True" Click="btn_ApplyClick" Height="24" /> </StackPanel > </Button> </StackPanel > </Grid>

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  • Xaml not WPF

    - by xan
    I am interested in using Xaml with expression blend for creating user interfaces in an application. However, because of the limitations of the target architecture, I cannot use WPF or C#. So, what I am interested in is in any examples / existing projects or advice from anyone who has experiance of this technology on the use of Xaml in it's "Pure" form as a specification language not tied to WPF. Specific questions: 1) Is it possible to use Blend + Xaml without the WPF elements, or without C# backing classes? 2) Are there any other implementations of Xaml parsers etc. which use different architectures, and can they work with blend or similar tools. 3) Are there alternative editor / designer tools which can help in this situation? I am aware of the MyXaml and MycroXaml projects, and have found a lot of resources on the web about Xaml, but 99% of it relates directly to WPF. This is fine for understanding the concepts of Xaml, but doesn't help with the implimentation I need. Many thanks!

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  • WPF MenuItem hiding (2 replies)

    Hi, I would like to hide selected MenuItem on Delete key press without closing the menu. My markup is: Menu MenuItem Header &quot;Menu&quot; MenuItem Header &quot;First&quot; KeyDown &quot;MenuItem KeyDown&quot;/ MenuItem Header &quot;Second&quot; KeyDown &quot;MenuItem KeyDown&quot;/ MenuItem Header &quot;Third&quot; KeyDown &quot;MenuItem KeyDown&quot;/ /MenuItem /Menu where event handler is: private void MenuItem KeyDown(object sender, KeyEventArgs e) { if (e.Key...

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  • Bitmap Effects In WPF - Part III

    In previous article we saw remaining three effects DropShadow, Bevel and Emboss. In this article we will see how to group effects, and we will see how we can achieve the effects with triggers.

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  • How to center and scale Silverlight applications using ViewBox control

    - by Jacek Ciereszko
    There are many ways to make your application scalable in Web Browser window and align it in the center. Usually we use two Grid controls to align and panel control (like Canvas) to scale our apps. Not the best solution <UserControl … >     <Grid x:Name="LayoutRoot" Background="White">         <Grid HorizontalAlignment="Center" VerticalAlignment="Center">             <Canvas x:Name="scalePanel" VerticalAlignment="Top" HorizontalAlignment="Center">                 …             </Canvas>         </Grid>     </Grid> </UserControl>               The example above usually works but there are better ways. How? Use ViewBox. ViewBox control contains scale mechanisms with some stretching options. So ViewBox together with Grid control is all what we need to align and scale our applications. Good solution <UserControl … >     <Grid x:Name="LayoutRoot" Background="White">         <Viewbox>             ...         </Viewbox>     </Grid> </UserControl> How to find ViewBox control For those applications created in Silverlight 4, ViewBox is available in plug-in. For applications created in Silverlight 3 you can find it in Microsoft Silverlight Toolkit. Demo Let’s create a simple application that will contain: Button, TextBlock and red Rectangle. It will also have some Margin settings. This application won’t be in the center of window and it will not scale. <UserControl … >     <Grid x:Name="LayoutRoot">         <Grid Margin="100, 50, 100, 20">                 <StackPanel Orientation="Horizontal">                     <Button Width="100" Height="100" Content="test"/>                     <TextBlock Text="Button" Width="100" Height="100" />                     <Rectangle Width="100" Height="100" Fill="Red"/>                 </StackPanel>         </Grid> </Grid> </UserControl>   Run demo: RUN But If we use ViewBox control, we will got centered and always scaled application.    <Grid x:Name="LayoutRoot">         <Viewbox>             <Grid Margin="100, 50, 100, 20">                     <StackPanel Orientation="Horizontal">                         <Button Width="100" Height="100" Content="test"/>                         <TextBlock Text="bottom" Width="100" Height="100" />                         <Rectangle Width="100" Height="100" Fill="Red"/>                     </StackPanel>             </Grid>         </Viewbox>     </Grid> Link to application: RUN (try to resize application’s window) Link to source code: SilverlightCenterApplication.zip References ViewBox for Silverlight 3 http://silverlight.codeplex.com/    Polish version: http://jacekciereszko.pl/2010/05/jak-wysrodkowac-i-skalowac-aplikacje.html Jacek Ciereszko

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  • WPF Applications &ndash; Handling the Unhandled

    - by David Totzke
    Instead of just letting your application crash, you can attach a method to the DispatcherUnhandledExceptionEventHandler and one to the AppDomain.Current.UnhandledException.  You wire these up in the code behind of your application which by default is App.xaml.cs.  You can log these errors or throw up a message Don Box and tell the user what happened.  Then you shut down the app gracefully.  You shut it down because something bad happened that you weren’t expecting and at this point there is no guarantee as to the state of the stack or memory or anything really.  All bets are off. If, on the other hand, the method for the UnhandledException is empty and the method for the DispatcherUnhandledEventHandler ends up in a call to a method called LogError() and the LogError() method is FUCKING EMPTY, and you just swallow the exceptions and keep on running, then, not so much.  I spent nearly a day trying to track down a bug that would have been obvious had something been logged or if it just crashed.  It’s my own fault I suppose.  I knew these were hooked up.  I just never suspected that there wouldn’t be any implementation at all.  Live and learn. Customs Man at Heathrow: Anything to declare, Sir? Jekyll and Hyde: Man has not evolved an inch from the slime that spawned him. Customs Man at Heathrow: Very Good, Sir. I tend to agree. Dave Just because I can…

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  • WPF MenuItem hiding (2 replies)

    Hi, I would like to hide selected MenuItem on Delete key press without closing the menu. My markup is: Menu MenuItem Header &quot;Menu&quot; MenuItem Header &quot;First&quot; KeyDown &quot;MenuItem KeyDown&quot;/ MenuItem Header &quot;Second&quot; KeyDown &quot;MenuItem KeyDown&quot;/ MenuItem Header &quot;Third&quot; KeyDown &quot;MenuItem KeyDown&quot;/ /MenuItem /Menu where event handler is: private void MenuItem KeyDown(object sender, KeyEventArgs e) { if (e.Key...

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