Questions on UI for WPF Forum

3 answers

191 views

Hi,

How I can improve the radChart performance when I do a (Window) resizing or zooming ?

I need to show several lineseries with several thousand of points. I'm okay of loading the data to series (it takes around 2-3sec) but after that if I wan't to do windows resizing or zooming, it's lock the UI and takes more than 10sec (if I have 5 series or more loaded to screen) to refresh the screen !!??

I really need to show the actual data so I cannot use the SamplingThreshold - feature

Can I disable redraw or something during the zooming/resizing?

Here's the full code of my demo project.

public partial class MainWindow : Window

{

private DataTable dt = null;

public MainWindow()

{

InitializeComponent();

radChart1.DefaultView.ChartArea.EnableAnimations = false;

radChart1.DefaultView.ChartLegend.Visibility = System.Windows.Visibility.Collapsed;

//radChart1.SamplingSettings.SamplingFunction = ChartSamplingFunction.Average;

radChart1.SamplingSettings.SamplingThreshold = 0;

radChart1.DefaultView.ChartArea.AxisX.DefaultLabelFormat = "HH:mm:ss";

radChart1.DefaultView.ChartArea.ZoomScrollSettingsX.ScrollMode = ScrollMode.ScrollAndZoom;

radChart1.DefaultView.ChartArea.AxisX.AutoRange = false;

radChart1.DefaultView.ChartArea.AxisX.IsDateTime = true;

radChart1.DefaultView.ChartArea.AxisX.MinValue = DateTime.Now.ToOADate();

radChart1.DefaultView.ChartArea.AxisX.MaxValue = DateTime.Now.AddMinutes(5000).ToOADate();

}

private void button2_Click(object sender, RoutedEventArgs e)

{

dt = CreateDataTable("SERIES_" + radChart1.SeriesMappings.Count.ToString());

MessageBox.Show("Data generated for series: " + "SERIES_" + radChart1.SeriesMappings.Count.ToString());

AddNewSeries("SERIES_" + radChart1.SeriesMappings.Count.ToString());

}

private void AddNewSeries(String tag)

{

AxisY axisY = new AxisY();

axisY.AxisName = tag;

axisY.Title = tag;

axisY.DefaultLabelFormat = "#VAL{#,##0.00}";

axisY.AutoRange = false;

axisY.MinValue = 0;

axisY.MaxValue = 200;

axisY.Step = 10;

Style customAxisYStyle = this.Resources["CustomAxis"] as Style;

axisY.AxisStyles.AxisLineStyle = customAxisYStyle;

axisY.AxisStyles.TickLineStyle = this.Resources["AxisYTickStyle"] as Style;

axisY.AxisStyles.MinorTickLineStyle = this.Resources["AxisYMinorTickStyle"] as Style;

axisY.AxisStyles.ItemLabelStyle = this.Resources["ItemLabelStyle"] as Style;

axisY.AxisStyles.TitleStyle = this.Resources["AxisTitleStyle"] as Style;

if (radChart1.DefaultView.ChartArea.AxisY.AxisName == "")

{

radChart1.DefaultView.ChartArea.AxisY = axisY;

}

else

{

radChart1.DefaultView.ChartArea.AdditionalYAxes.Add(axisY);

axisY.Visibility = System.Windows.Visibility.Collapsed;

}

LineSeriesDefinition seriesDef = new LineSeriesDefinition();

seriesDef.ShowItemLabels = false;

seriesDef.ShowPointMarks = false;

seriesDef.ShowItemToolTips = false;

seriesDef.SeriesName = tag;

SeriesMapping m1 = new SeriesMapping();

m1.ItemMappings.Add(new ItemMapping() { DataPointMember = DataPointMember.YValue, FieldName = tag, FieldType = typeof(double) });

m1.ItemMappings.Add(new ItemMapping() { DataPointMember = DataPointMember.XValue, FieldName = tag + "_TS", FieldType = typeof(DateTime) });

m1.SeriesDefinition = seriesDef;

m1.LegendLabel = tag;

m1.SeriesDefinition.AxisName = axisY.AxisName;

m1.ItemsSource = dt;

radChart1.SeriesMappings.Add(m1);

}

DataTable CreateDataTable(String tagName)

{

DataTable dt = new DataTable();

dt.Columns.Add(new DataColumn(tagName, typeof(Double)));

dt.Columns.Add(new DataColumn(tagName + "_TS", typeof(DateTime)));

Random r = new Random(Environment.TickCount);

for (int i = 0; i < 5000; i++)

{

DataRow dr = dt.NewRow();

if (radChart1.DefaultView.ChartArea.HasItems)

dr[tagName] = r.Next(1, 100);

else

dr[tagName] = r.Next(1, 100);

dr[tagName + "_TS"] = DateTime.Now.AddMinutes(i);

dt.Rows.Add(dr);

}

return dt;

}

Chart

answered on 17 Feb 2012

2 answers

69 views

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Hi!

To show / hide a pane, I set the IsHidden property to either true or false, this has always worked.

But with the latest release, I get some strange behaviour. If the pane is starting out as hidden (IsHidden = true) when I start the application and the user later changes this through a command (IsHidden = false), the pane is expanded, but without any content (ie the grid inside is not shown).

Am I doing something wrong?

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103 views

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Hi,

new empty row is shown after I click on "Click here to add new item" on my RadGridView. When I press Escape twice, exception is thrown:

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My RadGridView is filling by DataContext from DataSet and contains my definitions for EventHandlers: BeginningEdit, CellValidating, RowValidating, RowEditEnded and Deleting.

How can I exit and close this new row without saving and validating all cells?

Thanks,
Maros

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6 answers

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1 answer

77 views

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When I drag a row, I see a two-line tooltip-like box. The first line provides info about the item being dragged and the second line info about the item it would be inserted before or after, if it was dropped at that moment.

I've figured out how to configure what is displayed in the second line of the tooltip, using the DragCueActionContentTemplate and DragCueTooltipContentTemplate properties of the RowReorderBehavior class.

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1 answer

292 views

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3 answers

86 views

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Regards,
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I'm trying to set a specific style of watermark but the control seems to ignore some settings.

For example if I set the FontStyle to Italic in the example below - it does not render as Italic. However, changing the foreground color to crimson does work.

<t:RadWatermarkTextBox x:Name="FirstNameTextBox"

Grid.Row="0"

Grid.Column="0"

VerticalAlignment="Center"

HorizontalAlignment="Stretch"

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ToolTip="First Name"

>

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<TextBlock FontStyle="Italic" Foreground="Crimson">First Name</TextBlock>

</t:RadWatermarkTextBox.WatermarkContent>

</t:RadWatermarkTextBox>