Questions on UI for WPF Forum

1 answer

322 views

Radgridview filtering removed selected item from radgridview list.

Hi Team,

I am using radgridview telerik control and I am getting some issue when doing filtering in radgirdview control. please see details below

Suppose I have selected some item in radgridview list and after that if I click filter option and do some filtered and after that I reverted back my filtered option,

then in radgridview list I have all items again but whatever I selected earlier is not persisted.

So is their any way to persist my selected item ?

Thanks

General Discussions

answered on 12 Sep 2016

2 answers

265 views

Crosshair label definition template with chart values

I have a RadCartesianChart with a DateTimeContinuousAxis and a ChartCrosshairBehavior.

When the vertical line label shows – it displays the date/time. I want to display other data from the chart too – but even when I use a template for the label definition – the only DataContext I can access is the datetime.

Is there a way to customize the label definition - to include data from other sources?

/Flemming Rosenbrandt

ChartView

answered on 12 Sep 2016

3 answers

326 views

[Solved] Error XAML with style of themes

Hi to all,

I have a serious problem, after apply theme, I can't run project.

I received this error.

More information: 'An exception was thrown when the specification of a value of' System.Windows.Markup.StaticResourceHolder '.' line number '47' and row position '33'.

I tryed to remove all data about theme, nothing.

How can I get out to this problem?

Installer and Visual Studio Extensions

answered on 12 Sep 2016

3 answers

171 views

How to stretch text

In Microsoft Word and other text editors there is a ability which stretches the text horizontally. How should I do so in RadRichTextBox in WPF Apps.

Thanks

RichTextBox

answered on 12 Sep 2016

3 answers

591 views

[Solved] I can not set the minimum of RadCartesianChart.LinearAxis.

Hello. I try to set the scale of RadCartesianChart.LinearAxis and I can't. How I try to do it, please see the following. Below is XAML of the RadCartesianChart:

<telerik:RadCartesianChart Visibility="{Binding IsAbsoluteSplineChartVisible}">

<telerik:RadCartesianChart.HorizontalAxis>

<telerik:DateTimeContinuousAxis MajorStepUnit="Second" LabelInterval="5" LabelFormat="hh:mm:ss" FontFamily="Segoe UI" PlotMode="OnTicks" TickOrigin="{Binding AlignmentDate}"/>

</telerik:RadCartesianChart.HorizontalAxis>

<telerik:RadCartesianChart.VerticalAxis>

<telerik:LinearAxis FontFamily="Segoe UI" Title="Meters per second [m/s]" Minimum="{Binding ChartMinimum}" Maximum="{Binding ChartMaximum}"/>

</telerik:RadCartesianChart.VerticalAxis>

<telerik:RadCartesianChart.SeriesProvider>

<telerik:ChartSeriesProvider Source="{Binding SeriesData}">

<telerik:ChartSeriesProvider.SeriesDescriptors>

<telerik:CategoricalSeriesDescriptor CategoryPath="Category" ValuePath="Value" ItemsSourcePath="ChartPoints">

<telerik:CategoricalSeriesDescriptor.TypeConverter>

<local:SeriesTypeConverter/>

</telerik:CategoricalSeriesDescriptor.TypeConverter>

</telerik:CategoricalSeriesDescriptor>

</telerik:ChartSeriesProvider.SeriesDescriptors>

</telerik:ChartSeriesProvider>

</telerik:RadCartesianChart.SeriesProvider>

<telerik:RadCartesianChart.Behaviors>

<telerik:ChartPanAndZoomBehavior ZoomMode="Vertical" PanMode="Vertical"/>

</telerik:RadCartesianChart.Behaviors>

</telerik:RadCartesianChart>

Below is handler of ticks of sound velocity values polling timer.

private void Timer_Tick(object sender, EventArgs e)

{

// Сharts filling:

// get minimal value of sound velocity,

double min_1_2 = Math.Min(GlobalStaticMembers.FirstBeamSoundVelocity, GlobalStaticMembers.SecondBeamSoundVelocity);

double min_3_4 = Math.Min(GlobalStaticMembers.ThirdBeamSoundVelocity, GlobalStaticMembers.FourthBeamSoundVelocity);

this.ChartMinimum = Math.Floor(Math.Min(min_1_2, min_3_4));

// get maximal value of sound velocity,

double max_1_2 = Math.Max(GlobalStaticMembers.FirstBeamSoundVelocity, GlobalStaticMembers.SecondBeamSoundVelocity);

double max_3_4 = Math.Max(GlobalStaticMembers.ThirdBeamSoundVelocity, GlobalStaticMembers.FourthBeamSoundVelocity);

this.ChartMaximum = Math.Ceiling(Math.Max(max_1_2, max_3_4));

// adjust the value of the time on X-axis,

this._currentDate = this._currentDate.AddMilliseconds(TIMER_INTERVAL);

this.SeriesData.SuspendNotifications();

// get the first beam chart new point where newPoint.Value is sound velocity itself,

ChartPoint newPoint = new ChartPoint();

newPoint.Value = GlobalStaticMembers.FirstBeamSoundVelocity;

newPoint.Category = this._currentDate;

if (this.SeriesData[0].ChartPoints.Count > 50)

this.SeriesData[0].ChartPoints.RemoveAt(0);

this.SeriesData[0].ChartPoints.Add(newPoint);

// get the second beam chart new point where newPoint.Value is sound velocity itself,

newPoint = new ChartPoint();

newPoint.Value = GlobalStaticMembers.SecondBeamSoundVelocity;

newPoint.Category = this._currentDate;

if (this.SeriesData[1].ChartPoints.Count > 50)

this.SeriesData[1].ChartPoints.RemoveAt(0);

this.SeriesData[1].ChartPoints.Add(newPoint);

// get the third beam chart new point where newPoint.Value is sound velocity itself,

newPoint = new ChartPoint();

newPoint.Value = GlobalStaticMembers.ThirdBeamSoundVelocity;

newPoint.Category = this._currentDate;

if (this.SeriesData[2].ChartPoints.Count > 50)

this.SeriesData[2].ChartPoints.RemoveAt(0);

this.SeriesData[2].ChartPoints.Add(newPoint);

// get the fourth beam chart new point where newPoint.Value is sound velocity itself.

newPoint = new ChartPoint();

newPoint.Value = GlobalStaticMembers.FourthBeamSoundVelocity;

newPoint.Category = this._currentDate;

this.SeriesData[3].ChartPoints.Add(newPoint);

if (this.SeriesData[3].ChartPoints.Count > 50)

this.SeriesData[3].ChartPoints.RemoveAt(0);

this.SeriesData.ResumeNotifications();

}

Below is ChartMinimum and ChartMaximum properties definitions:

public double ChartMinimum

{

get { return this._chartMinimum; }

set { this.SetProperty(ref this._chartMinimum, value); }

}

public double ChartMaximum

{

get { return this._chartMaximum; }

set { this.SetProperty(ref this._chartMaximum, value); }

}

Below is ChartPoint class definition:

/// <summary>

/// Point for spline series.

/// </summary>

public class ChartPoint

{

private double _value;

private DateTime _category;

public ChartPoint() { }

public ChartPoint(DateTime category, double value)

{

this.Category = category;

this.Value = value;

}

public double Value

{

get { return this._value; }

set { this._value = value; }

}

public DateTime Category

{

get { return this._category; }

set { this._category = value; }

}

Below is the collection containing all series. This collection is used as datasource for telerik:ChartSeriesProvider.

/// <summary>

/// Gets or sets the collection containing series.

/// </summary>

public RadObservableCollection<SeriesModel> SeriesData { get; set; }

And below is SeriesModel class definition:

/// <summary>

/// The model of series (chart's curve).

/// </summary>

public class SeriesModel

{

#region Constructors

public SeriesModel() { }

public SeriesModel(RadObservableCollection<ChartPoint> chartPoints, string seriesType = "Spline")

{

this.ChartPoints = chartPoints;

this.SeriesType = seriesType;

}

#endregion

#region Properties

/// <summary>

/// Series type

/// </summary>

public string SeriesType { get; set; }

/// <summary>

/// Series points collection.

/// </summary>

public RadObservableCollection<ChartPoint> ChartPoints { get; set; }

#endregion

}

I also show you the converter definition:

/// <summary>

/// Series type converter.

/// </summary>

public class SeriesTypeConverter : IValueConverter

{

public object Convert(object value, Type targetType, object parameter, CultureInfo culture)

{

SeriesModel seriesItem = value as SeriesModel;

if (seriesItem.SeriesType == "Spline")

{

return typeof(SplineSeries);

}

else if (seriesItem.SeriesType == "Line")

{

return typeof(LineSeries);

}

else

{

return typeof(BarSeries);

}

public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)

{

/*throw new NotImplementedException()*/return null;

}

As you know, the value of sound is hundreds of meters per second. Say, for example, 345.55 meters per second (I especially take the value with hundredths of a meter). The value of sound velocity in a good flowmeter can varies from a few hundredths to a tenth of a meter not more. So, each timer tick, I take four sound velocity values (because the flowmeter has four ultrasonic beams), find minimal value of them and take floor for this value (Math.Floor). Then I find maximal value of these four velocity values and take ceiling for this maximal value (Math.Ceiling). So I'd like to limit the vertical axis by these minimum and maximum (ChartMinimum and ChartMaximum properties). But unfortunately I can't. Supports only the maximum (please see 'SoundVelocity.PNG' file attached and 'SoundVelocity2.PNG file attached, the second one has zoomed in chart). Minimum is not supported. Why? The folowing is What I need. So. I need that the vertical axis limited by minimum and maximum and with MajorStep == 0.01. For example, if minimal value of sound velocity (obtained on timer tick) is 325.7 then limiting minimum of vertical axis must be 325, if maximal value of the sound velocity obtained is, for example, 326.2 then limiting maximum of vertical axis must be 327. So in this case the vertical axis must be from 325 to 327 with MajorStep == 0.01 (!!! but not from 0 to 327 with MajorStep==0.01 !!!). Is this possible to do ofcourse. If yes, please show me how it can be implemented. Thank you very much in advance.

P.S. If you need some aditional information for answering on this my post, please write me.

ChartView

answered on 12 Sep 2016

3 answers

235 views

Parent of DropDown control in OutlookBar returns null

In my application, I have a outlook bar which has some menu items. On click event of mneu Item I want to traverse the visual tree upto main Window. For normal view of Outlook bar it is working properly but for collapsed view of outlook bar when I click menu item it traverse till PopUpRoot control only. Parent of this control returns null.

var parent = VisualTreeHelper.GetParent(this);
while (!(parent is Window))
{
parent = VisualTreeHelper.GetParent(parent);
}

OutlookBar

answered on 12 Sep 2016

12 answers

468 views

[Solved] Text property

Hi,

Will this control have a Text property that we could use to get the visible text? Using the combination of SearchText and SelectedItem, depending on if the user actually selected from the list, or entered a completly new value is not really "developer friendly".

update: of course, this can only work if the SelectionMode is set to Single. If it's multiselect, my question is not valid.

Thanks,
Gyula

AutoCompleteBox

answered on 09 Sep 2016

0 answers

126 views

Highlighted Text does not scroll correctly

I have a RichTextBox that I am searching. When the search result is selected the text is then highlighted correctly. However, once the RichTextBox is scrolled, the highlight does not follow the text that was highlighted, but instead stays where the text was initially found (see attached screenshot). Below is the code that highlights the desired text initially. Any thoughts on how to get the highlight to follow the text as it is scrolled?

01.class SearchResult

02.{

03. public string Display { get; set; }

04. public TextPointer Start { get; set; }

05. public TextPointer End { get; set; }

06.}

07.

08.public void DoSearch()

09.{

10. string toSearch = TextBox_Find.Text.Replace(@"\", @"\\")

11. .Replace("^", @"\^")

12. .Replace("$", @"\$")

13. .Replace(".", @"\.")

14. .Replace("|", @"\|")

15. .Replace("?", @"\?")

16. .Replace("*", @"\*")

17. .Replace("+", @"\+")

18. .Replace("(", @"\(")

19. .Replace(")", @"\)")

20. .Replace("[", @"\[")

21. .Replace("]", @"\]")

22. .Replace("{", @"\{")

23. .Replace("}", @"\}");

24. TextRange range = new TextRange(RichTextBox_AllComments.Document.ContentStart, RichTextBox_AllComments.Document.ContentEnd);

25. Regex reg = new Regex(toSearch, RegexOptions.Compiled | RegexOptions.IgnoreCase);

26.

27. var start = RichTextBox_AllComments.Document.ContentStart;

28. while (start != null && start.CompareTo(RichTextBox_AllComments.Document.ContentEnd) < 0)

29. {

30. if (start.GetPointerContext(LogicalDirection.Forward) == TextPointerContext.Text)

31. {

32. var matches = reg.Matches(start.GetTextInRun(LogicalDirection.Forward));

33. TextRange textrange = null;

34. foreach (Match match in matches)

35. {

36. textrange = new

TextRange(start.GetPositionAtOffset(match.Index, LogicalDirection.Forward), start.GetPositionAtOffset(match.Index + match.Length, LogicalDirection.Backward));

37. SearchResults.Add(new SearchResult() { Display = "Result " + (SearchResults.Count + 1).ToString(), Start = textrange.Start, End = textrange.End });

38. }

39. if (textrange != null) start = textrange.End;

40. }

41. start = start.GetNextContextPosition(LogicalDirection.Forward);

42. }

43.}

44.

45.private void ListBox_Find_SelectionChanged(object sender, SelectionChangedEventArgs e)

46.{

47. if (e.AddedItems.Count > 0)

48. {

49. bFindItemSelected = true;

50. SearchResult sr = e.AddedItems[0] as SearchResult;

51. RichTextBox_AllComments.Focus();

52. RichTextBox_AllComments.Selection.Select(sr.Start, sr.End);

53. ((UIElement)ListBox_Find.ItemContainerGenerator.ContainerFromItem(ListBox_Find.SelectedItem)).Focus();

54. }

55.}

RichTextBox

asked on 09 Sep 2016

2 answers

261 views

DateTimeContinuousAxis TimeSpan

Hi,

I want to use multiple line series to compare some analog sensor values over several production runs.

The production runs start at different time or dates. To compare them all time values substracted from the production run start, thus i get a compareable timespan for each value.

I tried to use a TimeSpan data type but that seems not to work with the DateTime Axes. With a DateTime datatype it works but if a production run takes more than one day I can only show the day of month. I can't show the day value as day 1, day 2 ... because the DateTime format string has no "elapsed days" only day on week or day of month.

Is there a way to use a TimeSpan or customize the lable formatting.

Thank you for your help

ChartView

answered on 09 Sep 2016

9 answers

238 views

SaveLayout WPF GridView

Hi All

We are assesing the WPF suite and will rely heavily on the GridView. I cant seem to see that there is an option to Save the Layout to an xml file.

It seems to be an option in the Silverlight and Winform versions of your suite, but not in WPF. Is this correct?

Nick

GridView

answered on 09 Sep 2016