Questions on UI for WinForms Forum

1 answer

159 views

Change the theme for a particular RadPageViewStrip item

Hello Telerik

I have a RadPageView in Strip Mode and I would like to highlight some pages on runtime.

By highlighting I mean change the theme color for the different state (selected, mouse over, etc.) of the RadPageView. The business need is to show the user which pages needed an action.

I have found how to change the backcolor of a RadPageView but not for the different state of the control. Is there a way to do it without handling multiple event ?

PageView

answered on 09 Sep 2015

4 answers

250 views

[Solved] Chart view image doesn't work correctly

Hi,

I'm facing a strange behaviour when i export a userControl containing a ChartView as a png picture.
Let's explain my issue with code.

First i create a userControl, this userControl has a title ( label) and a chartView.

this chart is slightly customized, i want to show checkboxes as legend items. to do this, i have followed an example mentioned in the forum.

If the checkbox is unckeced the related serie is hidden.

var myUserControl = new StatisticLayoutWithAdditionalStats();

myUserControl.ChartView.ChartElement.LegendElement.VisualItemCreating += LegendElement_VisualItemCreating;

/// Set layout properties

myUserControl.Title = "Blablabla";

myUserControl.ChartView.AreaType = ChartAreaType.Cartesian;

myUserControl.ChartView.ShowLegend = true;

LineSeries serie1 = new LineSeries();

LineSeries serie2 = new LineSeries();

serie1.DataSource = new BindingList<Coordinate>(Serie1DataSource.Coordinates);

serie1.CategoryMember = "Abscissa";

serie2.DataSource = new BindingList<Coordinate>(Serie2DataSource.Coordinates);

serie2.CategoryMember = "Abscissa";

serie2.ValueMember = "Ordinate";

myUserControl.ChartView.Series.Add(serie1);

myUserControl.ChartView.Series.Add(serie2);

// This class is used to customize legend items

public class CheckBoxLegentItemElement : LegendItemElement

{

private RadCheckBoxElement checkBox = new RadCheckBoxElement();

public CheckBoxLegentItemElement(LegendItem item)

{

this.checkBox.ToggleStateChanged += checkBox_ToggleStateChanged;

}

void checkBox_ToggleStateChanged(object sender, StateChangedEventArgs args)

{

if (args.ToggleState == Telerik.WinControls.Enumerations.ToggleState.On)

{

this.LegendItem.Element.IsVisible = true;

}

else

{

this.LegendItem.Element.IsVisible = false;

}

If i display this userControl in a Form it works fine.

But i want to export this userControl as a picture, the userControl can't be displayed in a form, juste created in memory.

myUserControl.Size = new Size(600,400);

Bitmap bitmap = new Bitmap(600, 400);

myUserControl.DrawToBitmap(bitmap, (myUserControl.ClientRectangle));

If all checkboxes are checked, the image is good.

But if, at least, one of them is uncheck the graph doesn't display.

Do you have any explanation ?

Regards,

Mathieu

ChartView

answered on 08 Sep 2015

1 answer

247 views

Chart localization

Hi,

I have a question about charts localization.

I create a chart, the horizontal axe is a DateTimeCategoricalAxis.

The format of the label is (Month - Year).

I display the graph with english and french culture, the month is translated correctly, which is very good !! :)

My question : is it possible the force the graph to display in french culutre even if the current culture is english ?

Regards,

Mathieu.

ChartView

answered on 08 Sep 2015

6 answers

442 views

ListView dispose in Double Click

Hello,

I noticed that when I try to dispose a ListView control from its own double click event the application crashes.

The control can be disposed from any other source (e.g. a button click) and this behavior occurs even on an empty List View.

Am I doing something wrong or is this a bug?

Thanks.

ListView

answered on 08 Sep 2015

5 answers

440 views

Sorting - Disable None

I want to toggle only between Ascending and Descending when the user clicks on the column header. I do not want the None option. Not sure what one would use the None option for anyway. That is not a sort.

GridView

answered on 08 Sep 2015

14 answers

295 views

[Solved] Problems implementing a custom TreeView grid editor

I'm trying to implement a custom TreeView editor on the GridView and I'm experiencing two problems.
1. My editor is confined to the size of the cell and it needs to be much larger than that
2. When I attempt to data bind the control nothing is displayed.

Sample code:

public class TreeEditor : BaseGridEditor

{

protected override RadElement CreateEditorElement ()

{

RadTreeViewElement treeViewElement = new RadTreeViewElement ();

//BindData (treeViewElement); // This doesn't work

LoadData (treeViewElement); // This displays data

return treeViewElement;

}

private static void BindData(RadTreeViewElement treeViewElement)

{

List<NodeData> Nodes = new List<NodeData>();

NodeData root = new NodeData() { ID = 0 };

root.Children.Add(new NodeData() { ID = 1 });

root.Children.Add(new NodeData() { ID = 2 });

Nodes.Add(root);

treeViewElement.DataSource = Nodes;

treeViewElement.DisplayMember = "ID\\ID";

treeViewElement.ChildMember = "Nodes\\Children";

}

private static void LoadData (RadTreeViewElement treeViewElement)

{

RadTreeNode root = treeViewElement.Nodes.Add ("Root");

root.Nodes.Add ("First", 1);

root.Nodes.Add ("Second", 1);

}

public override object Value

{

get

{

RadTreeViewElement editor = (RadTreeViewElement) this.EditorElement;

if (editor.SelectedNode == null)

return string.Empty;

return editor.SelectedNode.ToString ();

}

set

{

//TODO: ?

}

GridView

answered on 07 Sep 2015

3 answers

209 views

PivotFieldList fields grouping

I am using a PivotFieldList associated to a PivotGrid which is bound to an in-memory table.

The Grid and the Field List work OK, but my problem is my table has too many columns. More than 200.

This make it a bit difficult for the user to choose fields from the field list.

I was wondering if there is a way to group fields in the PivotFieldList. Something like the "date" fields. Each group would be a node opening on user click and showing the available column.

PivotGrid and PivotFieldList

answered on 07 Sep 2015

1 answer

159 views

Crash when adding filter on a calculated column

# Context
- Using RadGridView
- Having a column named "MyDataColumn", which contains different decimal values, including zero.
- Using UI, add filter on "MyDataColumn" : "Greater than: 0"
- Added a calculated column named "MyCalculatedColumn", using expression "MyDataColumn / MyDataColumn".
- Note that, at this point, it doesn't crash since we added the "Greater than: 0" filter on "MyDataColumn" ... without that filter, it will crash, as we all know division by zero is impossible.

# Behavior
- Using UI, add a filter on "MyCalculatedColumn"
- Application crash

GridView

answered on 07 Sep 2015

2 answers

170 views

Grand Total row formatting

On my grid I am grouping by one field, and have gridview1.mastertemplate.ShowTotals = True so that I can show a grand total for columns when that grid is grouped. My issue is that I need to change the appearance of the grand total row differently than the other (group) summary rows in ViewCellFormatting. Is this possible, and if so how can I do it?

Thanks

GridView

answered on 03 Sep 2015

4 answers

534 views

Disable mouse wheel scrolling inside GridView

When in the edit mode, GridSpinEditor inside RadGridView allows the numeric value to change by scrolling mouse centerl scroll wheel. I need to disable this. How can I disable this feature?

This feature lets the users to scrolldown to negative values, which is not desirable.

Thanks.

GridView

answered on 03 Sep 2015