Well u could change the size of he font and then invalidate the textblock which should trigger sizechanged event but it's a lil ghetto ;)
-- Sent from my mini iPad nano (excuse my spilling and grammar as I have giant man like fingers and this device as small keys) On 15/09/2010, at 5:08 PM, Colin Savage <[email protected]> wrote: > The app is a WYSIWYG layout for arranging textblocks and barcodes and things > to print on a label, so I want to avoid adding content that is not going to > be printed to the xaml. Since the changing of the font size is initiated by > the user, I can access the ActualHeight after that and update the rest of the > UI manually. > > It seems that the event only fires if it has in some way changed the layout > of the container, but that is contrary to what the doco says. > > http://msdn.microsoft.com/en-us/library/system.windows.frameworkelement.sizechanged(VS.95).aspx > "SizeChanged is raised whenever the size (either ActualHeight or ActualWidth) > has changed on the object, and is raised after the Measure and Arrange passes > are complete (for more information about these concepts, see Silverlight > Layout System). If the position of the object within a parent container > changes, but not the size, SizeChanged is not raised. " > > In this case the ActualHeight has changed, but it doesn't fire. I'll find a > workaround for it, I was just wondering if anyone knew the reason. > > Regards, > Colin Savage > > -----Original Message----- > From: [email protected] > [mailto:[email protected]] On Behalf Of Scott Barnes > Sent: Wednesday, 15 September 2010 4:10 PM > To: ozSilverlight > Subject: Re: Textblock SizeChanged > > Steve's correct, Canvas doesn't really care how wide/high its children > are in regards to itself. Encapsulating the TextBlock inside a border > and using that as your Source of Truth should get you the results you > desire, but yeah you have a ghetto border now :) > > Not sure why FontSize doesn't trigger SizeChanged though? in theory > the ActualWidth/ActualHeight should still trigger this event but given > FontSize may act differently to other FrameworkElements given it uses > glyphs etc. > > > > Regards, > > Scott Barnes > > http://www.riagenic.com > > > > On Wed, Sep 15, 2010 at 3:46 PM, Stephen Price <[email protected]> > wrote: >> Without trying anything in code, I'd be guessing that putting the >> textblock onto/into the canvas makes it behave differently than when >> its in the border. I've seen quite a lot of sizing things behave >> differently depending upon the parent container. >> >> Have you tried it in a grid instead of a canvas? It might work >> (guessing, have not tried it out) >> >> On Wed, Sep 15, 2010 at 11:23 AM, Colin Savage <[email protected]> >> wrote: >>> Before this list turns entirely into an ausdotnet trollfest, how about a >>> Silverlight question? >>> >>> >>> >>> Does anyone know why a textblock is not firing SizeChanged event when the >>> fontsize changes? >>> >>> >>> >>> Example: >>> >>> <Grid x:Name="LayoutRoot" Background="White"> >>> >>> <StackPanel> >>> >>> <Button Content="Resize" >>> >>> Name="button1" >>> >>> Click="button1_Click" /> >>> >>> <TextBlock Name="result" >>> >>> Text="Size goes here"/> >>> >>> <TextBlock Name="actual" >>> >>> Text="Actual goes here" /> >>> >>> </StackPanel> >>> >>> <Canvas Height="200" >>> >>> HorizontalAlignment="Left" >>> >>> Margin="57,92,0,0" >>> >>> Name="canvas1" >>> >>> VerticalAlignment="Top" >>> >>> Width="311"> >>> >>> <!--<Border Canvas.Top="10" >>> >>> Canvas.Left="10" >>> >>> BorderBrush="Green" BorderThickness="1">--> >>> >>> <TextBlock Canvas.Top="10" >>> >>> Canvas.Left="10" >>> >>> Name="textblock1" >>> >>> Width="180" >>> >>> Text="Some Text" /> >>> >>> <!--</Border>--> >>> >>> </Canvas> >>> >>> </Grid> >>> >>> >>> >>> public partial class MainPage : UserControl >>> >>> { >>> >>> public MainPage() >>> >>> { >>> >>> InitializeComponent(); >>> >>> >>> >>> textblock1.SizeChanged += textblock1_SizeChanged; >>> >>> } >>> >>> >>> >>> void textblock1_SizeChanged(object sender, SizeChangedEventArgs e) >>> >>> { >>> >>> result.Text = e.NewSize.ToString(); >>> >>> } >>> >>> >>> >>> private void button1_Click(object sender, RoutedEventArgs e) >>> >>> { >>> >>> textblock1.FontSize += 1; >>> >>> >>> >>> actual.Text = textblock1.ActualHeight.ToString(); >>> >>> } >>> >>> } >>> >>> >>> >>> >>> >>> Note that if I increase the fontsize, the ActualHeight changes, but the >>> SizeChanged event doesn't. Uncomment the border around the textblock and it >>> does start firing. >>> >>> >>> >>> Regards, >>> >>> Colin Savage >>> >>> _______________________________________________ >>> ozsilverlight mailing list >>> [email protected] >>> http://prdlxvm0001.codify.net/mailman/listinfo/ozsilverlight >>> >>> >> _______________________________________________ >> ozsilverlight mailing list >> [email protected] >> http://prdlxvm0001.codify.net/mailman/listinfo/ozsilverlight >> > _______________________________________________ > ozsilverlight mailing list > [email protected] > http://prdlxvm0001.codify.net/mailman/listinfo/ozsilverlight > > > _______________________________________________ > ozsilverlight mailing list > [email protected] > http://prdlxvm0001.codify.net/mailman/listinfo/ozsilverlight _______________________________________________ ozsilverlight mailing list [email protected] http://prdlxvm0001.codify.net/mailman/listinfo/ozsilverlight
