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Re: TabControl with DataGrid. Columns won't size correctly

Mark Salsbery27-Jan-09 11:33

Mark Salsbery

27-Jan-09 11:33

I didn't dig into the DataGrid source code, but this workaround seems to work...

I added a SelectionChanged handler to the tab control:

private void TabControl_SelectionChanged(object sender, SelectionChangedEventArgs e)
{
    System.Collections.IEnumerable olditemssource = datagrid2.ItemsSource;
    datagrid2.ItemsSource = null;
    datagrid2.ItemsSource = olditemssource;// new MyItemCollection_design();
}

Resetting the ItemsSource on the DataGrid is the only way (I could figure out) to get
the DataGrid to re-layout its columns correctly.

That's not really a good fix though, since if the user changes the column sort order,
it won't be preserved if the tab is navigated away from and back to.

They key point is to NOT set the ItemsSource until the DataGrid's associated tab is
navigated to for the first time. I'll leave that as an exercise for you Poke tongue | ;-P

I'm thinking this should probably be reported as a bug on the toolkit CodePlex site...

Mark Salsbery
Microsoft MVP - Visual C++
Java | [Coffee]

Re: TabControl with DataGrid. Columns won't size correctly

aalex67527-Jan-09 22:17

aalex675

27-Jan-09 22:17

Thanks, I tried setting ItemsSource in code the first time each tab is selected and that takes care of the issue. I think this may already be in the bug tracker on CodePlex as issue #8842(DataGrid Star Column Widths incorrect when DataGrid was loaded with its Visibility not Visibile[^]) so I just voted for that issue.

Thanks again for the help.

Re: TabControl with DataGrid. Columns won't size correctly

Mark Salsbery28-Jan-09 4:48

Mark Salsbery

28-Jan-09 4:48

aalex675 wrote:
I think this may already be in the bug tracker on CodePlex as issue #8842

Cool! I didn't find it when I looked. Thanks!

Cheers,
Mark

Mark Salsbery
Microsoft MVP - Visual C++
Java | [Coffee]

Change label font at runtime

Paolo Costa26-Jan-09 4:01

Paolo Costa

26-Jan-09 4:01

I,
I'm trying to extend the Standard WPF Label control in order to be able to change it's font (underline it) if a particular condition is true.

The font change will occur in the OnItialized method like this:

protected override void OnInitialized(EventArgs e)
{
if (conditionTrue)
{
//TODO Underline it
}
base.OnInitialized(e);
}

What code should I use to underline it?

Thanks

Paolo

Re: Change label font at runtime

Pete O'Hanlon26-Jan-09 4:08

Pete O'Hanlon

26-Jan-09 4:08

You could always use a variant of the sample I posted here[^].

"WPF has many lovers. It's a veritable porn star!" - Josh Smith

My blog | My articles | MoXAML PowerToys

Re: Change label font at runtime

BlitzPackage26-Jan-09 5:25

BlitzPackage

26-Jan-09 5:25

In addition to the XAML, you can also do this:

MyTextBlock.TextDecorations = TextDecorations.Underline;

To undo the underline:

MyTextBlock.TextDecorations = null;

Hope that helps.

Blitz

Re: Change label font at runtime

Pete O'Hanlon26-Jan-09 9:12

Pete O'Hanlon

26-Jan-09 9:12

While you can do this, one of the interesting things about applying triggers in XAML, is that (as soon as the trigger condition no longer applies), the default style is reverted to.

"WPF has many lovers. It's a veritable porn star!" - Josh Smith

My blog | My articles | MoXAML PowerToys

Re: Change label font at runtime

BlitzPackage26-Jan-09 14:47

BlitzPackage

26-Jan-09 14:47

Thanks; that's good to know. Doing it in XAML, then, makes it unnecessary to set it back to the default style. I thought about doing that - but just didn't know how to do so. I am such a Blend addict Big Grin | :-D

Re: Change label font at runtime

Paolo Costa26-Jan-09 20:58

Paolo Costa

26-Jan-09 20:58

I need to do it in c# code

Re: Change label font at runtime

Pete O'Hanlon26-Jan-09 22:23

Pete O'Hanlon

26-Jan-09 22:23

That was C# code. Why do you need to do it that way though?

"WPF has many lovers. It's a veritable porn star!" - Josh Smith

My blog | My articles | MoXAML PowerToys

Re: Change label font at runtime

Paolo Costa30-Jan-09 1:10

Paolo Costa

30-Jan-09 1:10

I don't know what I miss, but this code

MyTextBlock.TextDecorations = TextDecorations.Underline;

gives me a compilation error.

I solved with this code:

TextDecoration td = new TextDecoration(TextDecorationLocation.Underline, new System.Windows.Media.Pen(System.Windows.Media.Brushes.Red, 1), 0, TextDecorationUnit.FontRecommended, TextDecorationUnit.
TextBox1.this.TextDecorations.Add(td);

Paolo

P.S. I'm working on an XBAP application.

Re: Change label font at runtime

Pete O'Hanlon31-Jan-09 10:54

Pete O'Hanlon

31-Jan-09 10:54

You can still do it in XAML. XBAPs don't remove the ability to use XAML.

"WPF has many lovers. It's a veritable porn star!" - Josh Smith

My blog | My articles | MoXAML PowerToys

Text Hotlinks in WPF

BlitzPackage25-Jan-09 8:26

BlitzPackage

25-Jan-09 8:26

Greetings good people,

What control allows you to use "hotlink" text? It is the effect that occurs when you are surfing the internet and mouse over some text and it gets underlined since it is a link.

Any ideas on which control does this or how to do it would be greatly appreciated.

Thanks,
Blitz

Re: Text Hotlinks in WPF

Pete O'Hanlon25-Jan-09 8:57

Pete O'Hanlon

25-Jan-09 8:57

Off the top of my head, I'm going to suggest that you will need to apply a Hyperlink to your TextBlock using a trigger.

"WPF has many lovers. It's a veritable porn star!" - Josh Smith

My blog | My articles | MoXAML PowerToys

Re: Text Hotlinks in WPF

BlitzPackage25-Jan-09 13:55

BlitzPackage

25-Jan-09 13:55

Thanks, that did it. I just created MouseEnter, MouseLeave, and MouseLeftButtonDown events for the TextBlock. In the events I used TextDecorations to underline, not underline, and perform some action when clicked.

Re: Text Hotlinks in WPF

Pete O'Hanlon25-Jan-09 22:37

Pete O'Hanlon

25-Jan-09 22:37

Sounds good - and also sounds like something you should blog about.

"WPF has many lovers. It's a veritable porn star!" - Josh Smith

My blog | My articles | MoXAML PowerToys

Re: Text Hotlinks in WPF

Jammer25-Jan-09 23:19

Jammer

25-Jan-09 23:19

Second the motion! Smile | :)

Jammer
My Blog | Article(s)

Re: Text Hotlinks in WPF

BlitzPackage26-Jan-09 5:22

BlitzPackage

26-Jan-09 5:22

You know, now that you've mentioned it, I would really like to blog about what I've learned. However, I don't know where to get started. What do you suggest? Is there a blog here, or should I just set one up somewhere else and start blogging? What determines whether people come to your blog for such?

Thanks for any help you can provide.

Re: Text Hotlinks in WPF

Pete O'Hanlon26-Jan-09 8:20

Pete O'Hanlon

26-Jan-09 8:20

Well, I blog with wordpress.com. It's easy to set up an account there - just go here[^] to sign up.

"WPF has many lovers. It's a veritable porn star!" - Josh Smith

My blog | My articles | MoXAML PowerToys

Re: Text Hotlinks in WPF

Ray Cassick27-Jan-09 10:06

Ray Cassick

27-Jan-09 10:06

Why not write a good article about it?

LinkedIn[^] | Blog[^] | Twitter[^]

Re: Text Hotlinks in WPF

Pete O'Hanlon27-Jan-09 10:09

Pete O'Hanlon

27-Jan-09 10:09

It's possibly too short for an article, which was why I suggested a blog entry (with a suitable link here of course).

"WPF has many lovers. It's a veritable porn star!" - Josh Smith

My blog | My articles | MoXAML PowerToys

Re: Text Hotlinks in WPF

Ray Cassick27-Jan-09 10:12

Ray Cassick

27-Jan-09 10:12

Given the quality problem lately, I would think, as long as it was good content, we could do with a nice short (but good) one Smile | :)

Since I have been learning WPF I have been making myself understand the different ways to do things, both in XAML and in the code behind so that might help make the article sufficient length and have some good content.

LinkedIn[^] | Blog[^] | Twitter[^]

Re: Text Hotlinks in WPF

Pete O'Hanlon26-Jan-09 2:24

Pete O'Hanlon

26-Jan-09 2:24

Here's a XAML version that underlines the text when the mouse is over the label. By default, the effects are removed when the mouse leaves the area, so you don't need to handle the leaving events.

<Page xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
<StackPanel>
  <TextBlock>Font underline sample.</TextBlock>
  <TextBlock x:Name="myLink" Text="Click here">
    <TextBlock.Style>
      <Style>
        <Style.Triggers>
          <Trigger Property="TextBlock.IsMouseOver" Value="True">
            <Setter Property="TextBlock.TextDecorations" Value="Underline" />
            <Setter Property="TextBlock.Foreground" Value="Blue" />
          </Trigger>
        </Style.Triggers>
      </Style>
    </TextBlock.Style>
  </TextBlock>
</StackPanel>
</Page>

All that you need to add is the click event handling.

"WPF has many lovers. It's a veritable porn star!" - Josh Smith

My blog | My articles | MoXAML PowerToys

Re: Text Hotlinks in WPF

BlitzPackage26-Jan-09 5:23

BlitzPackage

26-Jan-09 5:23

Thanks for this XAML. That will help me a ton in addition to knowing how to do it in procedural code.

ellipse rendertransform

hotthoughtguy24-Jan-09 6:15

hotthoughtguy

24-Jan-09 6:15

can any body tell me how to Translate ellipse from its click event
Note: ellipse parant is grid

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