Questions on UI for WPF Forum

4 answers

638 views

Hi, how can i access the expander button (expand/collapse command)?
Basicly i need this button to be all over the header.
Thank you

Expander

answered on 06 May 2010

2 answers

159 views

RadRibbonSplitButton Drop Down closing when Drag starts from within...

Hello,

I have a RadRibbonSplitButton, whose DropDown Content is set to a plain UserControl housing only a single ListBox and a single 'Accept' button. This ListBox has some drag/drop code written to allow drag/drop of a row to another position within the same ListBox. Essentially, just repositioning a row within the ListBox to another position. When 'Accept' is pushed, I use the order of the rows in logic elsewhere in the app. If the context menu is clicked out of it disappears correctly, and if the user never clicks outside of the control, they are able to effectively select listbox items as they like, and drag/drop the listbox items to whatever positions they desire, all with the RadRibbonSplitButton drop down staying open until the 'Accept' button is pressed or the user clicks somewhere besides the drop down.

My problem, is that in WPF, anytime I clicked within the listbox, the RadRibbonSplitButton closes, (I believe a routed event may be getting handled here from the ListBoxItem Selection, and RadRibbonSplitButton handles that and closes the drop down) I set 'KeepOpen' to true, to get around this in WPF.

But whenever a Drag is initiated from one of these ListBox Items, the drag cue is displayed correctly and hovers while I drag, but the RadRibbonSplitButton drop down closes immediately. (So there is no List Box showing for me to reposition the ListBox Item being dragged)

I noticed this thread http://www.telerik.com/community/forums/wpf/draganddrop/drag-and-drop-between-a-window-and-a-popup.aspx, which notes that you cannot drag/drop between pop ups, but in my scenario I am just dragging/dropping within a single RadRibbonSplitButton drop down...

Do you have any suggestions that might help me achieve the functionality I am after, having the RadRibbonSplitButton drop down remain open until the 'Accept' button is pressed, or until the user clicks outside of the drop down. Not closing immediately, when a drag is initiated from within the drop down's ListBox?

Thanks for any help you can give!

- Lee

DragAndDrop

answered on 06 May 2010

5 answers

176 views

Databinding for CheckState

I started with the example with the Leages and Division (as example for data binding from the Demo) and added a tristate checkbox to the treeview and a "bool?" in each class. Initially all items are set to "true".

    
            public League(string name) 
        
            { 
        
              _name = name; 
        
              _divisions = new List<Division>(); 
        
              _selected = true; 
        
            } 
        
            string _name; 
        
            bool? _selected; 
        
            public string Name { get { return _name; } } 
        
            public bool? Selected { get { return _selected; } }

As described here I added the CheckStateConverter class which also handles the Indeterminate state.

    
            public class CheckStateConverter : IValueConverter 
        
            { 
        
              public object Convert(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture) 
        
              { 
        
                bool? result = (bool?)value; 
        
                ToggleState returnValue = ToggleState.Indeterminate; 
        
                if (result == true) 
        
                  returnValue = ToggleState.On; 
        
                else 
        
                { 
        
                  if (result == false) 
        
                    returnValue = ToggleState.Off; 
        
                } 
        
                return returnValue; 
        
              } 
        
            //....

The data binding works fine, but the thing I can't understand: If I expand "League A" and "Division A" and uncheck "Team I", "League A" and "Division A" also switch to "unchecked" instead of "indeterminate". If I uncheck "League A" and check it again the whole tree behaves correctly. What is wrong in my example?

Thanks in advance!
Jan

TreeView

answered on 06 May 2010

7 answers

148 views

NullReferenceException

Hi there,

I am getting a serious NullReferenceException (haven't managed to catch it by exceptions and it crashes my client), and it goes something like this:

   at Telerik.Windows.Controls.Map.BingMapProvider.InitializeProvider() in c:\Builds\WPF_Scrum\Release_WPF\Sources\Development\Controls\DataVisualization\Map\Providers\BingMapProvider.cs:line 542
   at Telerik.Windows.Controls.Map.BingMapProvider.ImageryService_GetImageryMetadataCompleted(Object sender, GetImageryMetadataCompletedEventArgs e) in c:\Builds\WPF_Scrum\Release_WPF\Sources\Development\Controls\DataVisualization\Map\Providers\BingMapProvider.cs:line 499
   at Telerik.Windows.Controls.Map.VEWPFImageryService.ImageryServiceClient.OnGetImageryMetadataCompleted(Object state) in c:\Builds\WPF_Scrum\Release_WPF\Sources\Development\Controls\DataVisualization\Service References\VEWPFImageryService\Reference.cs:line 2106
   at System.Windows.Threading.ExceptionWrapper.InternalRealCall(Delegate callback, Object args, Boolean isSingleParameter)
   at System.Windows.Threading.ExceptionWrapper.TryCatchWhen(Object source, Delegate callback, Object args, Boolean isSingleParameter, Delegate catchHandler)

It seems to be happening at random, so I can't pin it down. Is there any way I can solve this please?

Thanks,
Simon.

Map

answered on 06 May 2010

1 answer

137 views

How to consume data from a ms access database using a chart

Hi I am having problems trying to bind the radChart to a ms access database. Does anyone have a solution?. Or just a short tutorial. I see none in this forum at all.

Chart

answered on 06 May 2010

1 answer

98 views

Error during creation of WPF Project

Hi,

I try to create a Radcontrol WPF Project, but an error occur during creation.
You can see the detail of the error in the attached file.

Conf:
VS 2010 RTM
RadControl for WPF 2010.1.422

Kind regards.

General Discussions

answered on 06 May 2010

1 answer

83 views

sample for line graph with 80K data points

Hi,

I am trying to draw a line graph with two data series with each data series with about 80000 data points - that performs well? I find that after about 1000 data points it is a hog.

Is there anyway to create a line graph with 80K datapoints that is fairly quick? I don't need any frills on the chart - simple vanilla chart would be great.

thanks in advance,

Jas

Chart

answered on 06 May 2010

1 answer

107 views

Grouping and "not-allowed-sign"

1. I have a column in my Grid. It is not allowed to use grouping for this column (IsGroupable="False" ). When I try to drag-drop the column-title to the GroupPanel it just does not do anything. And that is what is expected, but the"not-allowed-image" did not show up.
2. Another column in the Grid is allowed to use grouping. When I drag-drop the title to the GroupPanel everything works fine.
But... when I try to drag-drop the title back again, this also works, but now the "not-allowed-sign" shows up.

Should this not be the other way around: the "not-allowed-sign" shows when I try to group a column with IsGroupable="False"...?

GridView

answered on 06 May 2010

1 answer

184 views

Validating / Styling

Hi

I have a small problem. When I validate a TextBoxes Value and than giving the User a visual feedback everything works prefectly fine.

When I do this with a RadComboBox, the only thing that works is the validation part. But I don't get any visual feedback. Here is the XAML part in my App.xaml

    
            <Application x:Class="CDM.App" 
        
                         xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" 
        
                         xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" 
        
                         xmlns:telerik="http://schemas.telerik.com/2008/xaml/presentation" 
        
                         xmlns:telerikInput="clr-namespace:Telerik.Windows.Controls;assembly=Telerik.Windows.Controls.Input" 
        
                         > 
        
                <Application.Resources> 
        
                <Storyboard x:Key="FlashError"> 
        
                        <ObjectAnimationUsingKeyFrames BeginTime="00:00:00"  
        
                                                   Storyboard.TargetProperty="(UIElement.Visibility)"> 
        
                            <DiscreteObjectKeyFrame KeyTime="00:00:00" Value="{x:Static Visibility.Visible}"/> 
        
                            <DiscreteObjectKeyFrame KeyTime="00:00:05" Value="{x:Static Visibility.Hidden}"/> 
        
                        </ObjectAnimationUsingKeyFrames> 
        
                    </Storyboard> 
        
                <Style x:Key="myErrorTemplate" TargetType="Control"> 
        
                    <Setter Property="Validation.ErrorTemplate"> 
        
                        <Setter.Value> 
        
                            <ControlTemplate> 
        
                                <StackPanel Orientation="Vertical"> 
        
                                    <Border BorderBrush="Red" BorderThickness="1"> 
        
                                        <AdornedElementPlaceholder Name="mycontrol"> 
        
                                            <Label Foreground="White" Background="Red"  
        
                                                       Content="{Binding ElementName=mycontrol,  
        
                                                                 Path=AdornedElement.(Validation.Errors)[0].ErrorContent}"> 
        
                                                    <Label.Triggers> 
        
                                                        <EventTrigger RoutedEvent="FrameworkElement.Loaded"> 
        
                                                            <BeginStoryboard Storyboard="{StaticResource FlashError}" /> 
        
                                                        </EventTrigger> 
        
                                                    </Label.Triggers> 
        
                                                </Label> 
        
                                        </AdornedElementPlaceholder> 
        
                                    </Border> 
        
                                    <!--<Label Foreground="White" Background="Red"  
        
                                                       Content="{Binding ElementName=mycontrol,  
        
                                                                 Path=AdornedElement.(Validation.Errors)[0].ErrorContent}"> 
        
                                    </Label>--> 
        
                                </StackPanel> 
        
                            </ControlTemplate> 
        
                        </Setter.Value> 
        
                    </Setter> 
        
                    <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> 
        
                  <Style TargetType="TextBox" BasedOn="{StaticResource myErrorTemplate}" /> 
        
                <Style TargetType="CheckBox" BasedOn="{StaticResource myErrorTemplate}" /> 
        
                    <Style TargetType="telerik:RadComboBox" BasedOn="{StaticResource myErrorTemplate}" /> 
        
                </Application.Resources> 
        
            </Application>

And here the the C# Part for Validation. Allthough I am convincied that the validation works. Tested it several times.

    
                public Platten() 
        
                    { 
        
                        this.preisReference.AssociationChanged += new CollectionChangeEventHandler(preisReference_AssociationChanged); 
        
                        this.AddError("preis", "Preiscode fehlt!"); 
        
                    } 
        
                    void preisReference_AssociationChanged(object sender, CollectionChangeEventArgs e) 
        
                    { 
        
                        if (e.Action == CollectionChangeAction.Remove) 
        
                        { 
        
                            OnPropertyChanging("preis"); 
        
                        } 
        
                        else 
        
                        { 
        
                            if (e.Action == CollectionChangeAction.Add) 
        
                            { 
        
                                this.RemoveError("preis"); 
        
                            } 
        
                            OnPropertyChanged("preis"); 
        
                        } 
        
                    } 
        
                    #region IDataErrorInfo Members 
        
                    private Dictionary<string, string> m_validationErrors = new Dictionary<string, string>(); 
        
                    private void AddError(string columnName, string msg) 
        
                    { 
        
                        if (!m_validationErrors.ContainsKey(columnName)) 
        
                        { 
        
                            m_validationErrors.Add(columnName, msg); 
        
                        } 
        
                    } 
        
                    private void RemoveError(string columnName) 
        
                    { 
        
                        if (m_validationErrors.ContainsKey(columnName)) 
        
                        { 
        
                            m_validationErrors.Remove(columnName); 
        
                        } 
        
                    } 
        
                    public bool HasErrors 
        
                    { 
        
                        get { return m_validationErrors.Count > 0; } 
        
                    } 
        
                    public string Error 
        
                    { 
        
                        get 
        
                        { 
        
                            if (m_validationErrors.Count > 0) 
        
                            { 
        
                                return "Customer data is invalid"; 
        
                            } 
        
                            else 
        
                            { 
        
                                return null; 
        
                            } 
        
                        } 
        
                    } 
        
                    public string this[string columnName] 
        
                    { 
        
                        get 
        
                        { 
        
                            if (m_validationErrors.ContainsKey(columnName)) 
        
                            { 
        
                                return m_validationErrors[columnName]; 
        
                            } 
        
                            else return null; 
        
                        } 
        
                    } 
        
                    #endregion

Thanks for your help.

ComboBox

answered on 06 May 2010

2 answers

150 views

RadTreeView(WPF) - Reaching Tag Property

Hi,
I added items to a treeview programmatically(with two for loop) and set the tag property to a value for each of an Child item. But there is a problem.

RadTreeViewItem rti;

for (int i = 0; i < ParentCount; i++)

{

rti =

new RadTreeViewItem();

rti.Header = Parent[i].Name;

for (int j = 0; j < ChildCount; j++)

{

rti.Items.Add(Child[j].Name);

rti.Tag = Child[j].Number);

}

MyRadTreeView.Items.Add(rti); //MyRadTreeView is declared at XAML code.

}

I want to reach rti's Tag property from any of an event(Selected, SelectionChange...), but none of these events give me the Tag property's value. The Tag's value comes with null.
How can I achieve this issue?

TreeView

answered on 06 May 2010