Questions on UI for WPF Forum

5 answers

349 views

TextBox.IsReadOnly doesn't work inside RadPropertyGrid.PropertyDefinitions

One TextBox is outside of RadPropertyGrid and One TextBox is inside RadPropertyGrid.  The two are set to IsReadOnly=True, but only the outside one actually show read-only.



Version: Telerik.Windows.Controls.Data, Version=2013.3.1316.45.

Compiled with .Net 4.5

WPF app.

<

Window

x:Class="PropGridTest.MainWindow"

xmlns:telerik="http://schemas.telerik.com/2008/xaml/presentation"

xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"

xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"

x:Name="ThisControl"

Title="MainWindow" Height="350" Width="525">

<Grid>

<Grid.RowDefinitions>

<RowDefinition Height="Auto"/>

<RowDefinition Height="*"/>

</Grid.RowDefinitions>

<TextBox IsReadOnly="True" Text="Read-only" />

<telerik:RadPropertyGrid

Grid.Row="1"

AutoGeneratePropertyDefinitions="False"

Item="{Binding ElementName=ThisControl}">

<telerik:RadPropertyGrid.PropertyDefinitions>

<telerik:PropertyDefinition

DisplayName="Prop 1"

GroupName="Group 1"

OrderIndex="0">

<telerik:PropertyDefinition.EditorTemplate>

<DataTemplate DataType="telerik:PropertyDefinition">

<TextBox HorizontalAlignment="Left" IsReadOnly="True" Text="Read-only" Width="100"/>

</DataTemplate>

</telerik:PropertyDefinition.EditorTemplate>

</telerik:PropertyDefinition>

</telerik:RadPropertyGrid.PropertyDefinitions>

</telerik:RadPropertyGrid>

</Grid>

</Window>

PropertyGrid

answered on 09 Jun 2014

6 answers

246 views

Specifying a binding for Tile.DisplayIndex causes exception

Hello Telerik,

I'm trying to specify a binding on a tile's displayindex through a style. For some reason i get an exception stating:

System.ArgumentNullException occurred
HResult=-2147467261
Message=Value cannot be null.
Parameter name: property
Source=PresentationFramework
ParamName=property
StackTrace:
at System.Windows.Setter.CheckValidProperty(DependencyProperty property)
InnerException:

This is my style for the tiles:



<!-- Tile Style -->

<Style TargetType="{x:Type telerik:Tile}"

<Setter Property="Background"

<Setter.Value

<LinearGradientBrush

<GradientStop Color=

"{Binding RelativeSource={RelativeSource AncestorType={x:Type telerik:Tile}, Mode=FindAncestor}, Path=Content.Color.StartColor}"

Offset="0.0"

/>

<GradientStop Color=

"{Binding RelativeSource={RelativeSource AncestorType={x:Type telerik:Tile}, Mode=FindAncestor}, Path=Content.Color.EndColor}"

Offset="1.0"

/>

</LinearGradientBrush

</Setter.Value

</Setter

<Setter Property="TileType" Value="{Binding RelativeSource={RelativeSource Mode=Self}, Path=Content.Size, Converter={StaticResource tileTypeConverter}}"

/>

<Setter Property="DisplayIndex" Value="{Binding RelativeSource={RelativeSource AncestorType={x:Type telerik:Tile}, Mode=FindAncestor}, Path=Content.DisplayIndex, Mode=OneTime}" />

</Style>

Am I doing something obviously wrong?

TileList

answered on 09 Jun 2014

3 answers

211 views

Set columns to same width

Hi,

I have a requirement of setting column widths to a uniform value, based on the widest column within a property group description.

Attached is a drawing illustrating the requirement.

Is this possible to do?

Thanks,
Edwin

PivotGrid

answered on 09 Jun 2014

5 answers

414 views

Binding Errors

Hi,

using RadDiagram shows binding errors at debug:

System.Windows.Data Error: 2 : Cannot find governing FrameworkElement or FrameworkContentElement for target element. BindingExpression:Path=StartPoint; DataItem=null; target element is 'PathFigure' (HashCode=17749809); target property is 'StartPoint' (type 'Point')

System.Windows.Data Error: 2 : Cannot find governing FrameworkElement or FrameworkContentElement for target element. BindingExpression:Path=StartBezierPoint; DataItem=null; target element is 'LineSegment' (HashCode=40121966); target property is 'Point' (type 'Point')

System.Windows.Data Error: 2 : Cannot find governing FrameworkElement or FrameworkContentElement for target element. BindingExpression:Path=EndPoint; DataItem=null; target element is 'PathFigure' (HashCode=45256881); target property is 'StartPoint' (type 'Point')

System.Windows.Data Error: 2 : Cannot find governing FrameworkElement or FrameworkContentElement for target element. BindingExpression:Path=EndBezierPoint; DataItem=null; target element is 'LineSegment' (HashCode=41585520); target property is 'Point' (type 'Point')

I ran the "custom connector" from Xaml-skd to check that I have no mistake in my application - shows the same errors.

Manfred

Diagram

answered on 09 Jun 2014

6 answers

187 views

NumericUpDown in ScrollViewer Touch Not Working Properly

Hi

If I place a NumericUpDown control with Windows8Touch theme in a ScrollViewer control, I can no longer hold down the plus or minus buttons to change the value. I can only do individual clicks.

Is there anyway to get round this?

Thanks

Nick

NumericUpDown

answered on 09 Jun 2014

5 answers

505 views

Getting selected row of a child grid

I am having some issues getting the row that is selected in any child grid.

My main grid is a grid of Manufacturers and each row can be expanded to view each manufacturer's parts. This is no problem. The problem is getting the current row with in each expanded child grid. Here is my code so far.

public partial class ManufacturersAndPartsSearch : Window

{

private ViewModels.ManufacturersAndPartsSearchViewModel vm;

public ManufacturersAndPartsSearch()

{

InitializeComponent();

var context = new ViewModels.ManufacturersAndPartsSearchViewModel(this);

this.vm = context;

this.DataContext = vm;

GridViewTableDefinition d = new GridViewTableDefinition();

d.Relation = new Telerik.Windows.Data.PropertyRelation("ChildParts");

//add child table defination to gridview

this.GridView.ChildTableDefinitions.Add(d);

this.GridView.DataLoaded += GridView_DataLoaded;

//this is to alter changes to each child grid

this.GridView.DataLoading += GridView_DataLoading;

//event to check and set the view model's current row to a heirarchial's currently selected row if selected

//explanation

/*The original code used data binding to set the current row in the viewmodel equal to the current row in the grid

this worked for the original purpose; however, since heirarchial grids are created for each row in the parent grid

that has parts saved in the database then there is no way to bind their currently selected row properties to the viewmodel

The databinding was ditched and instead this route was taken which accounts for both types of grids*/

this.GridView.SelectionChanged += GridView_SelectionChanged;

}

void GridView_SelectionChanged(object sender, SelectionChangeEventArgs e)

{

var grid = sender as RadGridView;

var item = grid.SelectedItem;

this.vm.CurrentItem = item;

MessageBox.Show(item.GetType().ToString());

}

When my message box shows I always get a type of "PartsManufacturerViewModel". This would be correct in the parent grid because I am binding to my viewmodel's "ManufacturersAndPartsSearchViewModel.CurrentItem which is of type object. Since I am binding the grid to a collection of PartsManufacturerViewModels then this is expected. When I click on a child row I still get the same type but I should be getting PartViewModel, which is a property inside of PartsManufacturerViewModel.

The basic gist is this. PartsManufacturerViewModel holds data relevant to the manufacturer while it has a property called "ChildParts" which is a collection of PartViewModels (which hold data relevant to the part itself). It is this collection that I bind the ChildTableDefinitions to.

My desired outcome is to be able to set "this.vm.CurrentItem" to either a PartsManufacturerViewModel or a PartViewModel depending on the current row that is clicked once, either in the parent or the child grid.

Here is the rest of my code (ViewModels) if it helps make things clearer.

public class PartsManufacturerViewModel : Accu_Base_Lib.Bases.ModelViewModelBase<DAL.PartsManufacturer>

{

public string Id

{

get { return (string)GetValue(IdProperty); }

set { SetValue(IdProperty, value); }

}

// Using a DependencyProperty as the backing store for Id. This enables animation, styling, binding, etc...

public static readonly DependencyProperty IdProperty =

DependencyProperty.Register("Id", typeof(string), typeof(PartsManufacturerViewModel));

public string Name

{

get { return (string)GetValue(NameProperty); }

set { Debug.WriteLine("ViewModel Name Changed " + this.Name); SetValue(NameProperty, value); }

}

// Using a DependencyProperty as the backing store for Name. This enables animation, styling, binding, etc...

public static readonly DependencyProperty NameProperty =

DependencyProperty.Register("Name", typeof(string), typeof(PartsManufacturerViewModel));

private ObservableCollection<PartViewModel> _childParts;

public ObservableCollection<PartViewModel> ChildParts

{

get

{

if (this._childParts == null)

{

GetChildren();

}

return this._childParts;

}

set

{

this._childParts = value;

}

public PartsManufacturerViewModel(DAL.PartsManufacturer model)

{

base.Init(model);

//Fills this viewmodel based off the model supplied.

UpdateViewModelFromModel();

}

public PartsManufacturerViewModel()

{

base.Init();

this.Model.Id = Guid.NewGuid().ToString();

this.Model.Name = string.Empty;

UpdateViewModelFromModel();

}

public class PartViewModel : Accu_Base_Lib.Bases.ModelViewModelBase<DAL.Part>

{

public string Id

{

get { return (string)GetValue(IdProperty); }

set { SetValue(IdProperty, value); }

}

// Using a DependencyProperty as the backing store for Id. This enables animation, styling, binding, etc...

public static readonly DependencyProperty IdProperty =

DependencyProperty.Register("Id", typeof(string), typeof(PartViewModel));

public string ManufacturerId

{

get { return (string)GetValue(ManufacturerIdProperty); }

set { SetValue(ManufacturerIdProperty, value); }

}

// Using a DependencyProperty as the backing store for ManufacturerId.  This enables animation, styling, binding, etc...

public static readonly DependencyProperty ManufacturerIdProperty =

DependencyProperty.Register("ManufacturerId", typeof(string), typeof(PartViewModel));

public string Name

{

get { return (string)GetValue(NameProperty); }

set { SetValue(NameProperty, value); }

}

// Using a DependencyProperty as the backing store for Name. This enables animation, styling, binding, etc...

public static readonly DependencyProperty NameProperty =

DependencyProperty.Register("Name", typeof(string), typeof(PartViewModel));

public string ModelNo

{

get { return (string)GetValue(ModelNoProperty); }

set { SetValue(ModelNoProperty, value); }

}

// Using a DependencyProperty as the backing store for ModelNo. This enables animation, styling, binding, etc...

public static readonly DependencyProperty ModelNoProperty =

DependencyProperty.Register("ModelNo", typeof(string), typeof(PartViewModel));

public decimal Price

{

get { return (decimal)GetValue(PriceProperty); }

set {

SetValue(PriceProperty, value); }

}

// Using a DependencyProperty as the backing store for Price. This enables animation, styling, binding, etc...

public static readonly DependencyProperty PriceProperty =

DependencyProperty.Register("Price", typeof(decimal), typeof(PartViewModel));

public PartViewModel(DAL.Part model)

{

base.Init(model);

//Fills this viewmodel based off the model supplied.

UpdateViewModelFromModel();

}

public PartViewModel()

{

base.Init();

this.Model.Id = Guid.NewGuid().ToString();

UpdateViewModelFromModel();

}

GridView

answered on 09 Jun 2014

2 answers

116 views

Best theming approach

I have a question about the recommended theming approach to use. I get the feeling that theming aspect of telerik controls has developed a little over the years, and there now appears to be a number of possible approaches, but it's not clear to me which is the best or recommended approach to take.

If we forget about the use of the StyleManager class, from what I can tell you can there are still a number of approaches

1- Link to the required Binaries, link to the theme DLL under the same location and specify a number of resource dictionaries in the format <ResourceDictionary Source="/Telerik.Windows.Themes.Windows8;component/Themes/Telerik.Windows.Controls.xaml" />

2 - Link to the required NoXaml.Binaries, link to the theme DLL under NoXaml.Binaries as well and specify the resource dictionaries as above

3 - Link to the required Binaries, include the required XAML Themes from the Themes.implicit directory as PAge resources and specify the local resource dictionaries as <ResourceDictionary Source="Themes/System.Windows.xaml"/>

4 - Link to the required NoXAML.Binaries, include the required XAML Themes from the Themes.implicit directory as PAge resources and specify the local resource dictionaries as <ResourceDictionary Source="Themes/System.Windows.xaml"/>

What's the differences and which would be the best approach to take?

Cheers

General Discussions

answered on 09 Jun 2014

3 answers

210 views

Font group header color is black

We have a grid and before I modified the Item and InstanceItem template, the header font was white when using the Expression_Dark theme. Now it is black. If you look at your example: http://demos.telerik.com/silverlight/#Timeline/Theming, the text changes to white to provide contrast with the dark background.

However, the back text remains present.

Paul

TimeLine

answered on 09 Jun 2014

3 answers

170 views

Multi touch support / UI for WPF

Hello,

We have to develop a multi touch application for a large touch screen (3.50 meters).
In order to simplify the use, we would like to use complex gestures, based on several fingers / two hands instead of menus.
Is there a support for this kind of requirements in the Telerik solution, or a way to interface Telerik with GestureWorks library ?
Thanks a lot for your answer

Pascal

General Discussions

answered on 09 Jun 2014

29 answers

981 views

Data templates and MVVM support

I know that this has been asked in the past and that the official answer is that ItemsSource is not supported in RadPanelGroup. But this feature is a must for us and if it is not provided we will need to implement a workaround. Concretely, we need to be able to bind ItemsSource to a collection of model objects and use DataTemplates to transform them into RadPanes or a suitable class.

1. Is this feature planned for future releases of the Telerik controls?
2. If not, is there any code, either released or not, that can be used as a workaround ? One could imagine a PaneFactory that would track INotifycollectionChanges in a collection and feed the Items property of a RadPaneGroup.
3. Finally, if there is no such support code, we will have to implement it ourselves. Any gotchas that we should be aware of before starting to work on it?

Thanks in advance. I would appreciate if you could provide some answers as soon as possible.

Docking

answered on 08 Jun 2014