Questions on UI for WPF Forum

2 answers

137 views

PreserveFocus() in GridViewDataControl.OnItemsChanged

Hi, support team,

We've upgraded to 2012.2.0607.40 recently and I found one chagne in the RadGridView that impacts user experience.
Basically we have input boxes (hosted inside the grid) to allow user to enter something to filter the grid. The problem is every time user entered something in the text box, GridViewDataControl.OnItemsChanged will be executed, and the grid found that it has the focus (because we host the text box in the grid) so it call a PreserveFocus internally to set the focus to itself and actually steal the focus from the text box inside the grid.

Right now my work around is to override the OnItemsChanged to set the focus back but it's still having problem sometimes.

     protected override void OnItemsChanged(NotifyCollectionChangedEventArgs e)
     {
       var inputElement = Keyboard.FocusedElement;
       base.OnItemsChanged(e);
       if (inputElement is TextBox)
       {
         Dispatcher.BeginInvoke(() => Keyboard.Focus(inputElement), DispatcherPriority.Input);
       }
     }

Can you look into fix the problem?

Thanks
Jason

GridView

answered on 10 Jul 2012

2 answers

101 views

[Solved] Best RadControls to......

Hi,

I would like to ask the experts and the general community users telerik his advice on the correct selection of controls for a scenario like this:

An application (WPF Web Application) that at runtime, the creation of multiple items (a user control perhaps) but these items can be classified into 1 of 5 types ..... ie item 1 can be type A, type B item 2, etc ..... forming a list of selectable items grouping by type....

Furthermore, these elements must be contained in a manner that allows the user to drag and drop on another control or container.

The variety of Telerik controls is impressive and in some tests I made several mistakes .... or several ways to do wrong .... in any case, what kind of controls may be used for a similar scenario .... I permitted through the functionality that is required?

In advance, thank you all.

General Discussions

answered on 09 Jul 2012

0 answers

147 views

Undefined CLR namespace error

Hi All,

I can successfully compile the installed WPF demos included in the commerical version. But I cannot preview the XAML views. I get the error below. I only have Q1 2012 installed for all the Telerik Products on this this machine, I uninstalled all others.

Error 82 Undefined CLR namespace. The 'clr-namespace' URI refers to a namespace 'Telerik.Windows.Examples.RibbonView' that is not included in the assembly. C:\Program Files (x86)\Telerik\RadControls for WPF Q1 2012\Demos\Examples\RibbonView\WPF\RibbonWindow\Example.xaml 4 15 RibbonView.WPF

Can someone point out what might be happening here?

Thanks,

Reid

General Discussions

asked on 09 Jul 2012

3 answers

165 views

How to change GridView column header background

I exported the style in Blend but don't see a way to change the Column header background. Is this possible to do?
Rod

GridView

answered on 09 Jul 2012

2 answers

144 views

GridViewComboBoxColumn strange trouble

Hi, we have very strange GridViewComboBoxColumn's behaviour. Code is very simple, but we have different result when execute our program on different PC. Normal behaviour should be next:
1) select any item in 3rd row combobox;
2) choose second cell in this row.
3) selected item in 1st column should be selected!!!

But on 50% PC we don't have this, i.e. selected item pull down everywhere. We lose selected item on LostFocus. In debug mode we saw, that debugger comes to GET of Employee.Name property after ComboBox selection changed (on the PC with wrong behaviour). And debugger comes to SET of this property on the PC with normal behaviour. It's hard to believe and to explain. What's wrong with this control?

BUT !!! We don't have any trouble if use common template with ComboBox (i.e. without using GridViewComboBoxColumn) - ex.code3.

Ex.code1: Main Window XAML:

<telerik:RadGridView Name="dGrid" AutoGenerateColumns="False" Height="188" VerticalAlignment="Top">

<telerik:RadGridView.Columns>

<telerik:GridViewComboBoxColumn

ItemsSourceBinding ="{Binding Path=Names, Mode=TwoWay}"

DataMemberBinding="{Binding Path=Name, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}"

UniqueName="ClmNames"

>

</telerik:GridViewComboBoxColumn>

<telerik:GridViewDataColumn

DataMemberBinding="{Binding Path=Name, Mode=TwoWay}">

</telerik:GridViewDataColumn>

</telerik:RadGridView.Columns>

Ex.code2: Main window C#:

public MainWindow()

{

InitializeComponent();

_employees = new List<Employee>(){

new Employee {Names = new List<string>{"Ann", "Nata"}, Name = "Ann"},

new Employee {Names = new List<string>{"Elise", "Ivan", "Марк"}, Name = "Ivan"},

new Employee {Names = new List<string>{"Elise", "Ivan", "Марк"}},

};

dGrid.ItemsSource = _employees;

}

Ex.code3: Working template XAML:

<telerik:GridViewDataColumn.CellTemplate> 

<DataTemplate> 

<ComboBox ItemsSource="{Binding Path=ImprovementList}" DisplayMemberPath="refimprovement.name_full" 

SelectedItem="{Binding Path=RecalcManualItem.cfaccimprovementlist, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}" 

SelectionChanged="ComboBox_SelectionChanged" /> 

</DataTemplate> 

</telerik:GridViewDataColumn.CellTemplate>

GridView

answered on 09 Jul 2012

3 answers

444 views

Latitude and Longitude of visible area.

Hi,

Is it possible to get the longitude and latitude of the visible area on screen?

The scenario is the user has zoomed into a city, I want to be able to get the upper left lat and long, the lower right lat and long and then based on those values go to the database and get all the branches in that area.

Simplistic code example.

public void ItemsRequest(object sender, ItemsRequestEventArgs e)

{

var dataContext = page.DataContext as MappingViewModel;

if (dataContext == null)

return;

//var minZoom = e.MinZoom;

var upperLeft = e.UpperLeft;

var lowerRight = e.LowerRight;

var branches = _repository.GetBranches(upperLeft.Latitude, upperLeft.Longitude, lowerRight.Latitude, lowerRight.Longitude);

dataContext.SetBranches(branches, e);

}

The problem is that the e.upperLeft and e.LowerRight latitude and longitude values don't seem to represent what is in the visible area.

Sorry for my lack of understanding, this is the first time I have developed for maps so this may be a really stupid question! :-)

Regards,
Mark

Map

answered on 09 Jul 2012

1 answer

141 views

could not find the type"telerik:IndicatorList "

i download the free trial RadControlsForWpfSetup_2012_2_611,and i study to us the gauge controls following this page : http://www.telerik.com/help/wpf/radgauge-overview.html

but when i run this corde

<Window x:Class="WpfApp.MainWindow"

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"

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

<Grid>

<telerik:RadialScale>

<telerik:IndicatorList>

<telerik:StateIndicator Name="stateIndicator"

Left="0.45"

Top="0.25"

RelativeWidth="0.2"

RelativeHeight="0.2">

</telerik:StateIndicator>

</telerik:IndicatorList>

</telerik:RadialScale>

</Grid>

</Window>

there are some erro message:
1、can't find the type"telerik:IndicatorList"
2、there is no Left 、Top、 RelativeWidth and RelativeHeight proprietary in StateIndicator
i also reference the these .dll: Telerik.Windows.Controls.DataVisualization.dll Telerik.Windows.Controls.dll Telerik.Windows.Data.dll
I do not konw the reason .
who can help me
Thanks !

Gauges

answered on 09 Jul 2012

2 answers

119 views

Freez On Filter

Hello,

I'm trying since friday to use telerik: a greate product, but I have an issue.
I have Datagrid with large string columns and activated Expression_Dark theme.

<telerik:RadGridView telerik:StyleManager.Theme="Expression_Dark" ItemsSource="{Binding Path=Collection}" AutoGenerateColumns="False">
<telerik:RadGridView.Columns>
<telerik:GridViewDataColumn Header="Path" DataMemberBinding="{Binding Path=Path}"/>
<telerik:GridViewDataColumn Header="Path2" DataMemberBinding="{Binding Path=Path}"/>
<telerik:GridViewDataColumn Header="Path3" DataMemberBinding="{Binding Path=Path}"/>
</telerik:RadGridView.Columns>
</telerik:RadGridView>

After Application startup I scrolled directly with the slider to the right end of datagrid window and clicked Filter button on Path3
My Application is frozen.

You can reproduce this Issuue with my Project: http://ysoft.de/filtertest.zip

Could you please check the issue and give me a reply?

GridView

answered on 09 Jul 2012

1 answer

67 views

Issue of radbook reseting to front page

Hi,

I got a RadTabControl whose itemsource is databinded to an observablecollection and it's itemtemplate has a RadBook. I am also using a RadPager attached to the RadBook in the itemtemplate. Everything with the binding and stuff works fine.

When I have two objects in the collection, two tabs are generated. This is ok and each tab has its RadBook fully loaded as expected. Browsing and fliping the pages are also ok. But, when I move from one tab to the other, the previous tab's RadBook (the one that lost focus) goes back or resets to the front page. The page that was last viewed does not hold.

Why is that?

Thanks

Book

answered on 09 Jul 2012

12 answers

316 views

[Solved] Themes

I couldn't find a better place to put this request or opinion...
I would also like to see the ganttview work with the different themes as I am finding it is the one control in our entire application that you can't read and looks out of place if the user select certain themes, especially expression_dark.

It would be really nice if you could simply

StyleManager.ApplicationTheme = (Theme)themeUserSelected;

InitializeComponent();

and have the ganttview match the rest of the application without having to use downloaded resource dictionaries or workarounds.

GanttView