Questions on UI for WPF Forum

1 answer

113 views

Problem with Drag And Drop 2010 Q3 SP1

hey guys,

I'm experiencing a problem with Drag And Drop within my RadTreeView... This worked fine under 2010 Q3, just since installing the SP1 I am getting this bug.. the code from the RadTreeView is below....

the error i'm receving is..

"An exception of type 'System.InvalidOperationException' occurred in Telerik.Windows.Controls.dll but was not handled in user code

Additional information: Root AdornerLayer Not Found. Please make sure that your root visual is Window or other element that has an adorner layer. Alternatively, wrap your root panel in an <AdornerDecorator> element."

further info...

"Error. Root AdornerLayer Not Found. Please make sure that your root visual element is window or other element that has an adorner layer alternatively wrap your root panel in an <AdornerDecorator> element.

When attempting to drag an element..

<DockPanel LastChildFill="True">

<telerikNavigation:RadTreeView x:Name="uiActivitiesList" IsDragDropEnabled="True" Margin="-20,0,0,0"

BorderThickness="0" HorizontalContentAlignment="Stretch" HorizontalAlignment="Stretch" TextDropAfter="Drop After" TextDropBefore="Drop Before"

SelectionChanged="uiActivitiesList_SelectionChanged" SelectionMode="Multiple" dragDrop:RadDragAndDropManager.AllowDrop="True" IsDragPreviewEnabled="False"

IsDragTooltipEnabled="True" DragEnded="uiActivitiesList_DragEnded" SourceUpdated="uiActivitiesList_SourceUpdated"

ItemsSource="{Binding ActivityModelViewCollection, NotifyOnSourceUpdated=True, NotifyOnTargetUpdated=True,Mode=OneWay}"/>

</DockPanel>

I'm unsure if this is a bug or if i just need to wrap my user control in an AdornerDecorator, but some further information would be great.

http://eeuauaughhhuauaahh.ytmnd.com/

DragAndDrop

answered on 24 Jan 2011

2 answers

118 views

How to capture GridView's CellLostFocus event?

Hi,
I am using MVVM pattern. I have a telrik gridview and i want to capture its CellLostFocus event,for that i am using CellEditEnded event. But problem is that this event is firing when i am tabbing out of the cell,not on lost focus of the cell. Is there any way to capture CellLostFocus event of gridview. Since I am using MVVM pattern so I also dont want to write any code in code behind.

Thanks

GridView

answered on 24 Jan 2011

1 answer

310 views

Remove RadPane during Close

Hi,
Is it possible to remove a RadPane from a RadDocking, instead of hiding it?
Ideally, I'd like to wire up the Close so that it removes the "closed" pane from the control. Is this possible?

Thanks.

Docking

answered on 24 Jan 2011

0 answers

159 views

Custom shape of Progressbar?

How to make a custom shape of progressbar?For example,change the shape of progressbar from rectangle to triangle.
Best regards.

ProgressBar

asked on 24 Jan 2011

1 answer

99 views

WPF Demo problem.

Hi,
just recently started evaluating your products. The demo page is excellent, but i ran into an error of some sort.
On the wpf demos i was trying out the GridView -> Performance -> Client binding to 1 mil. records, i get an error when i start scrolling the data by using the scrollbar slider. It doesn't go to an error if i use either the page down area or the arrows.

I'm using IE 8

-Matti

GridView

answered on 24 Jan 2011

1 answer

100 views

Custom Sort Order

Hi,

Is is possible to used a custom sort order to perform a column sort in a GridView column?

For example, I want to use a custom sort to sort text column row values 1,2,10,3 to have a sort order of 1,2,3,10 rather then 1,10,2,3

Thanks
Daniel

GridView

answered on 24 Jan 2011

5 answers

145 views

Drag cue ContextTemplate in C#?

I want to change the datatemplate of the DragCue (I mean i want to change the image source of the image tag applied in datatemplate in XAML). I used the following event but it didn't help me out. please help ASAP.

      private void OnDragQuery(object sender, DragDropQueryEventArgs e)
        {
            cue = new ContentControl();
            e.QueryResult = true;
            cue.MouseUp += new MouseButtonEventHandler(cue_MouseUp);

            e.Options.DragCue = cue;

            ImageSource IMGSOURCE = new BitmapImage(new Uri("/Images/header_idea.png",UriKind.Relative));

            DataTemplate dt = new DataTemplate();

            FrameworkElementFactory ef = new FrameworkElementFactory(typeof(Image));
            ef.SetValue(Image.SourceProperty, IMGSOURCE);

            dt.VisualTree = ef;
            cue.ContentTemplate = dt;

            e.Options.ArrowCue = RadDragAndDropManager.GenerateArrowCue();
            e.Handled = true;
        }

DragAndDrop

answered on 21 Jan 2011

1 answer

88 views

RadDrag and drop problem in drag cue

hello admin,
i have pasted the OnDragQuery event of the drag and drop. the two lines of code in which i have given the datatemplate to the drag cue's content template is is fine enough. But the image source in the datatemplate in xaml is always static and i' not able to bind the image source. So, instead of that i wanted to give the dragcue a new image in C#. It does work, but its not firing and triggering the mouse up event. please point out any mistake and please suggest anything new if this isn't the right way to do it. And please i don't want to use the binding, as it is not working properply. Suggest something in DEeail. In DETAIL please, or attach and perfect and suitable example..Thanks in advance. please its important

void OnDragQuery(object sender, DragDropQueryEventArgs e)
{
ContentControl dragCue = new ContentControl();
e.QueryResult = true;
dragCue.MouseUp += new MouseButtonEventHandler(dragCue_MouseUp);

dragCue.ContentTemplate = this.Resources["DragTemplate"] as DataTemplate; //is fine,
e.Options.DragCue = dragCue; // but has static image souce in xaml

//Image im = new Image();             //this commented code doesn't fire
//im.Width = 40;                     //the MouseUp event, when i
//im.Height = 40;                     //don't give the
//im.Source = new BitmapImage(new Uri(@"/Images/drive.png", UriKind.Relative));  //content template to it. want
//e.Options.DragCue = im;             // to use it to give dynamic image
                                     //source instead
                                    // of above highlighted code.

e.Options.ArrowCue = RadDragAndDropManager.GenerateArrowCue();
e.Handled = true;

}

DragAndDrop

answered on 21 Jan 2011

1 answer

240 views

Event when the input is empty?

I'm extending the RadDatePicker. I have implemented a new property that tells whether the text input in the DatePicker is valid (that is if can be parsed to a DateTime):

/// <summary>

/// Tells whether the input in the TextBox of this DatePicker is valid. This property is

/// updated continously as the user types in the TextBox.

/// </summary>

public bool IsInputValid

{

get

{

return (bool)GetValue(RadDatePickerExtended.IsInputValidProperty);

}

set

{

SetValue(RadDatePickerExtended.IsInputValidProperty, value);

}

public static readonly DependencyProperty IsInputValidProperty = DependencyProperty.Register("IsInputValid", typeof(bool), typeof(RadDatePickerExtended), new FrameworkPropertyMetadata(true));

I'm setting the value of this property in an event handler for the ParseDateTimeValue event:

private void RadDatePickerExtended_ParseDateTimeValue(object sender, ParseDateTimeEventArgs args)

{

//If RadDatePicker could not parse the input...

if (!args.IsParsingSuccessful)

{

//HERE I DO SOME EXTRA PARSING FOR INPUT THAT I WANT TO SUPPORT

//BUT THAT IS NOT SUPPORTED BY RadDatePicker. IN ALL CASES

//WHERE THE PARSING IS SUCCESFUL AND A DATETIME IS SET, I

//ALSO SET args.IsParsingSuccessful TO TRUE.

IsInputValid = args.IsParsingSuccessful;

}

else

{

//The input was succesfully parsed by the default parsing in the RadDatePicker.

IsInputValid = true;

}

This seems to work fine. But the problem is that if the user deletes the text in the input the event is NOT dispatched and thus my method is not executed. If the user provides some invalid input so that my IsInputValid property is set to false and then clears the input, IsInputValid will still be false! I want to set it to true when the input is empty (this will mean that the value of the DatePicker is null which is allowed in my case).

So my question is: Is it possible to get notified in some way when the input is cleared by the user?

DatePicker

answered on 21 Jan 2011

1 answer

161 views

Handling RadButton return key press

I am currently trying to handle the return key press for a RadButton control via the PreviewKeyDown event but am unable to. I can successfully handle other keystrokes, such as function keys, however the event is not raised when the return key is pressed. I can only assume that this is because the return key is seen as an access key and so handled elsewhere. Is there a way to turn this off or bypass it so that I can handle the return key for myself?

Buttons

answered on 21 Jan 2011