WPF Rotary Button Control - WPF Discussion Boards

WPF Rotary Button Control

14-May-15 18:57

You can use the same approach in Silverlight as WPF:
https://msdn.microsoft.com/en-us/library/dd759035(v=vs.95).aspx[^]

So its just a matter of understanding how to use the TreeView control and attatch a ViewModel to it:
Simplifying the WPF TreeView by Using the ViewModel Pattern[^]
Working with Checkboxes in the WPF TreeView[^]

Kevin Marois12-May-15 12:09

12-May-15 12:09

At one time the Epxression Blend team had one available[^] but the download link no longer works.

I was able to get the assembly, but I'd like the code.

Anyone have one of these, or know of one? Source would be nice.

If it's not broken, fix it until it is

Richard Deeming13-May-15 1:23

Richard Deeming

13-May-15 1:23

Something like this?
Tutorial: Creating a Lookless WPF Custom Rotate Control[^]

"These people looked deep within my soul and assigned me a number based on the order in which I joined."
- Homer

Kenneth Haugland13-May-15 1:27

13-May-15 1:27

Have you seen this?
http://www.kirupa.com/forum/showthread.php?377728-WPF-ROTARY-Control[^]

Kevin Marois13-May-15 3:47

13-May-15 3:47

Yes. It's pointing to the same page I posted

If it's not broken, fix it until it is

Kenneth Haugland13-May-15 4:07

13-May-15 4:07

You have his e-mail then....

Kevin Marois13-May-15 4:08

13-May-15 4:08

I can try.. Did you see the date on that page.. 24 Oct 07

If it's not broken, fix it until it is

Kenneth Haugland13-May-15 4:11

13-May-15 4:11

Last reply was 2013.

Kevin Marois13-May-15 4:12

Need A WPF Joystick Type Control

13-May-15 4:12

That's a blog pointing to the page with the source. The source page is 2007. The download link doesn't work.

I'll email the blogger, but I think it's a stretch.

If it's not broken, fix it until it is

Kevin Marois12-May-15 8:06

Re: Need A WPF Joystick Type Control

12-May-15 8:06

I'm going to be controlling a camera... tilt/pan/zoom.

Anyone know of a joystick type of control for use in WPF? Something that looks like the little joystick on a game controller would be nice.

Thanks

If it's not broken, fix it until it is

Afzaal Ahmad Zeeshan12-May-15 8:18

Afzaal Ahmad Zeeshan

12-May-15 8:18

Here... Two threads

https://social.msdn.microsoft.com/Forums/vstudio/en-US/5a71a029-97af-4407-88e3-c3f876fb65a5/i-want-to-create-joystick-kind-of-control-in-wpf?forum=wpf[^] (Social MSDN Forums)
A Joystick Control[^]

Hope they would help you out.

The sh*t I complain about
It's like there ain't a cloud in the sky and it's raining out - Eminem
~! Firewall !~

How to forward Validation Errors from elements of a UserControl to the UserControl proper

Bernhard Hiller12-May-15 2:29

Re: How to forward Validation Errors from elements of a UserControl to the UserControl proper

12-May-15 2:29

I created a WPF (.Net 4) UserControl containing some ComboBoxes and a TextBox. In XAML, some ValidationRules are bound to the TextBox. If the TextBox contains invalid data, a red frame is shown, and the tooltip is set to the error description. Works well.
Next, I placed two instances of that UserControl on a form, and added a button. In XAML, the button is connected to a RelayCommand of the ViewModel. Now I want the button to be enabled only when both of the UserControls contain valid data only.
Not a problem, I thought, let me use a strategy which works elsewhere. I added a trigger:

HTML

<Button Content="_OK" ... Command="{Binding Path=OKCommand}">
    <Button.Style>
        <Style TargetType="{x:Type Button}">
            <Setter Property="IsEnabled" Value="false" />
            <Style.Triggers>
                <MultiDataTrigger>
                    <MultiDataTrigger.Conditions>
                        <Condition Binding="{Binding ElementName=cascadingComboFrom, Path=(Validation.HasError)}" Value="false" />
                        <Condition Binding="{Binding ElementName=cascadingComboTo, Path=(Validation.HasError)}" Value="false" />
                    </MultiDataTrigger.Conditions>
                    <Setter Property="IsEnabled" Value="true" />
                </MultiDataTrigger>
            </Style.Triggers>
        </Style>
    </Button.Style>
</Button>

But there is a catch: Validation.HasError is always false for the UserControls - the Validation failed for an element inside the UserControl, not for the UserControl proper.
I know that I can register the Click event of the button, check the validity there using the method shown in http://stackoverflow.com/questions/127477/detecting-wpf-validation-errors[^], and prevent the execution of the RelayCommand by setting the Handled property of the RoutedEventArgs to true. But that looks more like WTF than WPF.
What do you suggest? How can I retrieve the Validation Errors of the UserControl's children? Or how can I get them in the RelayCommand's CanExecute method? Or some other tricks?

Pete O'Hanlon12-May-15 3:07

Pete O'Hanlon

12-May-15 3:07

Rather than basing your validation on the UI, it's helpful to base it on the underlying ViewModel instead. A relatively simplistic approach is outlined in this[^] article.

Re: How to forward Validation Errors from elements of a UserControl to the UserControl proper

Bernhard Hiller12-May-15 3:54

Re: How to forward Validation Errors from elements of a UserControl to the UserControl proper

12-May-15 3:54

There is another catch: the TextBox is bound to an int property. If the user enters "abc", updating the int property of the UserControl fails.

Pete O'Hanlon12-May-15 3:58

Pete O'Hanlon

12-May-15 3:58

That's not a problem. That's precisely the type of thing a ViewModel is designed to solve. Have a property backing your TextBox of type string, and then test the input there. Only pass the value on if it's an int. Alternatively, back it with a Behavior[^] to ensure the user cannot enter invalid values.

Re: How to forward Validation Errors from elements of a UserControl to the UserControl proper

Bernhard Hiller12-May-15 23:45

Re: How to forward Validation Errors from elements of a UserControl to the UserControl proper

12-May-15 23:45

Thanks for the hint. I'll look into that approach.
The vaildation errors occur in the realm of the UserControl, while the Button and its command are in the realm of the Window (and its ViewModel, resp.). Things will become more complicated, but I'll try it.

Pete O'Hanlon12-May-15 23:49

Pete O'Hanlon

12-May-15 23:49

Drop that Behavior on the TextBox and you won't need to reject ABC... because that's taken care of for you.

Re: How to forward Validation Errors from elements of a UserControl to the UserControl proper

Bernhard Hiller12-May-15 23:52

WPF UserControl In WinForms Problem

12-May-15 23:52

Meanwhile I implemented INotifyPropertyChanged in the UserControl (which was created similar to Colin Eberhardt's A Simple Pattern for Creating Re-useable UserControls in WPF / Silverlight[^]), added a IsValid property (which checks the validity as described in http://stackoverflow.com/questions/127477/detecting-wpf-validation-errors[^]), and raise its PropertyChanged event whenever the UserControl gets notified about a ValidationError.
For that last purpose, some elements of the UserControl received Validation.Error="ItemError" and NotifyOnValidationError="True" entries in XAML.
It works now, but its is not nice. Hence I will look into the other method suggested.

Kevin Marois7-May-15 13:20