Questions on UI for WPF Forum

1 answer

183 views

ChartView Legend Visibility and font size of legend

Hi

I am working on the functionality having ChartView inside RadTileView. We are displaying a lot of charts in tiles.
The problem I am facing is when the Tile is restored, I want to remove all the legends and wants to show only chart. And again when the tile is maximized I want to display entire chart with legends.

I am attaching a image for better understaing.

Another problem is that when the chart is restored, the font size of Legends are not decreasing accordingly.

For RadTileViewItem: MinimizedHeight = 125, RestoredHeight=25. But when I restored the Tile, I am expecting the font size on chart to reduced by 80%.

Can you please help me in that.

I have created another but somehow it was not working
http://www.telerik.com/community/forums/wpf/charting-kit/chartview-legend-visibility.aspx

ChartView

answered on 08 May 2013

16 answers

1.2K+ views

RadGridView DataBinding is too slow

Hallo,

I'm using the RadGridView for our business applications.
But our users are complaining that the data will not be loaded quickly.
So I've made some comparative tests with a regular DataGrid and found out that the DataGrid binds data much faster than the RadGridView.

Loadingtime of 50000 Datarows with 8 Columns: 17 miliseconcs.
Binding to a DataGrid: 120 milliseconds. Used Memory: 7 MByte.
Binding to a RadGridView: 4 seconds. Used Memory: 51 MByte.

Are there any settings in RadGridView to get the same performance as a DataGrid?

I used following xaml for the RadGridView:

<telerik:RadGridView x:Name="RadGridView1" ShowGroupPanel="False" CanUserResizeColumns="False" CanUserFreezeColumns="False" ItemsSource="{Binding Items, Source={StaticResource model}, Mode=OneWay}" IsReadOnly="True" AutoGenerateColumns="false" DataLoadMode="Asynchronous" IsFilteringAllowed="False" >

<telerik:RadGridView.Columns>

<telerik:GridViewDataColumn DataMemberBinding="{Binding ID}" />

<telerik:GridViewDataColumn DataMemberBinding="{Binding Col2}" />

<telerik:GridViewDataColumn DataMemberBinding="{Binding Col3}" />

<telerik:GridViewDataColumn DataMemberBinding="{Binding Col4}" />

<telerik:GridViewDataColumn DataMemberBinding="{Binding Col5}" />

<telerik:GridViewDataColumn DataMemberBinding="{Binding Col6}" />

<telerik:GridViewDataColumn DataMemberBinding="{Binding Col7}" />

</telerik:RadGridView.Columns>

</telerik:RadGridView>

and following for the DataGrid:

<DataGrid ItemsSource="{Binding Items, Source={StaticResource model}}" RowHeight="25" CellStyle="{StaticResource Test}" />

GridView

answered on 08 May 2013

1 answer

188 views

Find TabItem - Chande Header

Hi,

i use the ContentTemplateSelector property of the RadTabControl. This way i can define different DataTemplates.

I created a property in my TabViewModel class called Content and based on its value I am selecting different DataTemplates. I also defined the different DataTemplates in the App.xaml file.

Now I want to change the Header of the TabItem out of the UserControl. And this is the problem, how do I solve this problem?

thanks
best regrads
rene

TabControl

answered on 07 May 2013

8 answers

334 views

GridLine Visibility via condition

Hi,

is it possible to show/hide the GridLines via condition? So if condition is true, then show horizontal Gridline, if not, then hide it?
Want to make it, because Merging is not as possible as in older Application (take a look at attachment).

Or is there any other solution to show grid as attachment with WPF RadGridView?

Best regards,

David

GridView

answered on 07 May 2013

2 answers

222 views

MEF and PRISM module Button loading

I have managed to set up a PRISM region within the radRibbonView.RadRibbonTab which then has radRibbonGroup's loaded in from the modules containing the buttons for that module. All good so far, however the modules donot load in the order which the radribbongroups need to appear in the tab.

I have tried using the radOrderedwrappanel in conjunction with the groupvariant priority as per snippit below to provide a solution with no luck. Is there a way of doing this or will I have to look into custom loading order of the modules?

I ahve also added a custom regionAdaptor which seems to be working fine to allow the radribbongroups to be loaded into the orderedwrappanel. However the ordering and sizing didnt work - it started wrapping after 3 ribbonGroups and it didnt order the groups correctly.

<telerik:RadRibbonGroup Header=" Order Search ">

<telerik:RadRibbonGroup.Variants>

<telerik:GroupVariant Priority="2" Variant="Large"/>

</telerik:RadRibbonGroup.Variants>

<telerik:RadOrderedWrapPanel>

<telerik:RadRibbonButton LargeImage="/Icons/48/Search.png" Size="Large" telerik:ScreenTip.Title="Order Search"/>

</telerik:RadOrderedWrapPanel>

</telerik:RadRibbonGroup>

RibbonView and RibbonWindow

answered on 07 May 2013

1 answer

142 views

SpellChecker

Hi,

I would like to know if it's possible to add new words to the existing spellchecker of Telerik?
Also, I would like to know if it possible to use an external spellchecker such a medical spellchecker with Telerik components?

Thank's

SpellChecker

answered on 07 May 2013

3 answers

314 views

Drag and drop reorder rows

Hi there

For the past day I'm trying to implement drag and drop behavior in the same gridview. I used the demo example to implement this.
The events are fired when I click a row and drag, but the row isn't dropped.
When I debug the code, the DragDropPayloadManager.GetDataFromObject() method returns null in OnRowDragOver and OnDrop for the following lines:

--- OnRowDragOver

var details = DragDropPayloadManager.GetDataFromObject(e.Data, "DropDetails") as DropIndicationDetails;

--- OnDrop

var draggedItem = DragDropPayloadManager.GetDataFromObject(e.Data, "DraggedItem");

var details = DragDropPayloadManager.GetDataFromObject(e.Data, "DropDetails") as DropIndicationDetails;

Because of that, both events return nothing.

Am I missing something?

Thanks in advance
Lowie

GridView

answered on 07 May 2013

1 answer

792 views

[Solved] Slow switching between tabs

Hi,

I've a RadTabControl with some RadTabItem and one of them contains a RadGridView with a lot of content (I bind an ObservableCollection).
When I switch from any tab to this one it always takes some time (a few seconds) so it seems that in some how the gridview is loaded again.

Since this list is static, are there a way to improve the performance?

TabControl

answered on 07 May 2013

1 answer

230 views

Change TabItem - Binding Problem

Hi,

i use a RadTabControl with a AutoCompleteBox on it. Here i select a customer and fill the TabItem with data.
After changing the Tab the TabItem is empty? the AutoCompelteBox is empty, too!

The Main Problem is that i create each tab by code and in each tab a usercontrol is loaded. Now i select a customer
and display the data in the tabitem. When i change the tab the first one is empty again when i come back.

What is to do to hold the information in the TabItem?

THanks
Best Regards
Rene

TabControl

answered on 07 May 2013

3 answers

252 views

put some mergefield readonly

Hi,
I want to "protect" mergefield inside my document, to prevent user to change the display of the field directly in the richtextbox(i use a specific editor to edit the value of my mergefield).

I tried to write a procedure to put or remove readonly on my mergefield, but I have some trouble to make it work :

private void SetMergeFieldReadOnly(MergeField field, RadRichTextBox richTextBox, bool isReadonly)

{

var fieldEnd = richTextBox.Document.EnumerateChildrenOfType<FieldRangeEnd>()

.FirstOrDefault(fs => (fs.FieldRangeStart.Field is MergeField)

&& (((MergeField)fs.FieldRangeStart.Field).PropertyPath == field.PropertyPath));

if (fieldEnd != null)

{

var fieldStart = fieldEnd.FieldRangeStart;

var posFieldStart = new DocumentPosition(richTextBox.Document);

var posFieldEnd = new DocumentPosition(richTextBox.Document);

posFieldStart.MoveToInline(fieldStart);

posFieldEnd.MoveToInline(fieldEnd);

if (isReadonly) // add readonlyrange

{

richTextBox.Document.Selection.Clear();

richTextBox.Document.Selection.SetSelectionStart(posFieldStart);

richTextBox.Document.Selection.AddSelectionEnd(posFieldEnd);

richTextBox.InsertReadOnlyRange();

}

else // remove readonlyrange

{

// 1st method - doesn't work.

//richTextBox.Document.Selection.Clear();

//richTextBox.Document.Selection.SetSelectionStart(posDebField);

//richTextBox.Document.Selection.AddSelectionEnd(posFinField);

//richTextBox.DeleteReadOnlyRange(); // <-- no error but the field is still readonly after that.

// 2nd method - works but not properly

var readOnlyRangeStarts = richTextBox.Document.EnumerateChildrenOfType<ReadOnlyRangeStart>();

var posDebReadOnly = new DocumentPosition(richTextBox.Document);

var posFinReadOnly = new DocumentPosition(richTextBox.Document);

foreach (var readOnlyRangeStart in readOnlyRangeStarts)

{

if (readOnlyRangeStart.End != null)

{

posDebReadOnly.MoveToInline(readOnlyRangeStart);

posFinReadOnly.MoveToInline(readOnlyRangeStart.End);

if ((posFinReadOnly >= posFieldStart) && (posDebReadOnly <= posFieldEnd))

{

richTextBox.DeleteReadOnlyRange(readOnlyRangeStart); // remove the protection on ALL the readonly range !!!

}

I wonder if there are not some easier way to do this ? (Or I might be doing something wrong ?)

At the moment, I can only set/unset readonly ALL the mergefield of the document. It works, but sadly it's really slow ...

Are they're some way to "lock" the fields without using some ReadOnlyRange ?

Thanks.

RichTextBox

answered on 07 May 2013