Questions on UI for WPF Forum

7 answers

2.2K+ views

PDF Viewer loads PDF from Memory Stream very slow

Hello,

I am using the PDFViewer control and my intent is to show a PDF (prior to writing to disk), the issue I am having is that once the PDF attempts to load into the PDF Viewer it is incredibly slow. The PDF is larger in size (roughly 167+ pages) but that is not uncommon for the average pdf we are generating. My question is, is there anyway to optimize loading information into this control to make PDF's not take an upward of 10-15 minutes to load?

Code Example:

private void LoadPdfToView()

{

try

{

//Create a memory stream we will use to hold our PDF

MemoryStream DocumentStream = new MemoryStream();

//A 3rd party control that creates the PDF document (this save feature can save to memory stream or to disk)

TheDoc.Save(DocumentStream);

//Create the Fixed document based on the PDF document in memory

RadFixedDocument document = new PdfFormatProvider ( DocumentStream, FormatProviderSettings.ReadOnDemand ).Import();

//Load the pdf document into our control

pdfViewer.Document = document;

}

catch (Exception ex)

{

MessageBox.Show("Error Loading PDF to view: " + ex.Message);

}

PDFViewer

answered on 07 Sep 2018

1 answer

128 views

Grid row colors on combinations of error, selected, hover

I've looked quite extensively for this in the grid control, but I'll ask before I request the enhancement.

We are using the RadGridView quite extensively, and we have one major UI problem with it. The issue has two parts:

When a row is selected, hovering over it makes no visible difference.
When a row is in error, it is impossible to tell whether the row is also selected and/or being hovered over.

These may seem minor, but they are a growing annoyance to our users, especially since error conditions and multi-row-select are common in their use case.

Is it possible for me to work around this without extracting a large chunk of template and changing it? (That's the only option I've come up with so far.) If so, how? If not, how can I add this as a feature request for Telerik?

Thanks!

Brad.

GridView

answered on 07 Sep 2018

1 answer

253 views

Wizard in MVVM - Buttons

Hi,
I use the Wizard in a MVVM Based App.

I have a WizardControlView and a WizardControlViewModel.

<telerik:RadWizard x:Name="wizard"
                             HorizontalAlignment="Left"
                             Height="300"
                             VerticalAlignment="Top"
                             Width="500"
                               IsContentPreserved="True"
                             localControlsBindings:RadWizardPageBinding.ItemSource ="{Binding WizardPages}">
</telerik:RadWizard>

Inside the WizardPages are no footer with buttons defined.
I use the default footer.

No I can see the buttons in the footer.
When I click e.g. the Cancel Button I want to react inside the WizardControlViewModel and not in the WizardControlView (according MVVM).

Is it possible ?

Regards
Stefan

Wizard

answered on 07 Sep 2018

1 answer

125 views

RadPane separators

Hi

Is it possible to insert a separator between the RadPane headers in a RadPaneGroup?

/Flemming Rosenbrandt

Docking

answered on 07 Sep 2018

1 answer

457 views

Set line color of CartesianChartGrid

Hi, I have a chart that display gridlines using the cartesianchartgrid, defined like this in xaml:

<telerik:RadCartesianChart.Grid>

<telerik:CartesianChartGrid MajorLinesVisibility="XY"/>

</telerik:RadCartesianChart.Grid>

But I can't figure out how to change the color of the gridlines. I don't see any brush or color properties for it on the class, changing the foreground etc brush does not work.

ChartView

answered on 07 Sep 2018

0 answers

137 views

Syncing problem between ScheduleView and GanttView

I have a and that are synced. When one or more appointments are selected in the , it updates the above by adding tasks (only the root task) to the source of the only if those tasks are not already in the list else the list is left as is.

Now sometimes when I am selecting multiple appointments the bindings on the Textblock display incorrectly in the Ganttview as seen in the before and after pics. It's the correct object behind the display UI element, only its binding seems to be boggled up for some reason. Sometimes when selecting another appointment, the UI updates correctly but most of the time it doesn't.

I modified the event container -

- that I found in Telerik's dictionaries and added the following in order to display the text on the bars:

<TextBlock x:Name="txtBlock" Padding="5"

Text="{Binding DataItem.Title}"

FontSize="{Binding DataItem.Appearance.FontSize}"

FontWeight="{Binding DataItem.Appearance.FontWeight, Converter={StaticResource ConvertStringToFontWeight}}"

Foreground="{Binding DataItem.Appearance.HexForeground, Converter={StaticResource ConvertHexToBrush}}"/>

DataItem is a GanttTask that implements the IGanttTask interface.

Here is the code that executes when appointments are selected (on selection changed event) in the ScheduleView:

private void scheduleView_AppointmentSelectionChanged(object sender, SelectionChangedEventArgs e)

{

if (vm != null && vm.SelectedAppointment != null && ViewMode == "Resource")

{

vm.GanttTaskList = new ObservableCollection<GanttTask>();

List<string> ids = new List<string>();

foreach(object o in this.scheduleView.SelectedAppointments)

{

AppointmentTask app = o as AppointmentTask;

IPlanTask task = app.UnderlyingTask.RootParent;

if(!ids.Contains(task.IPlanTaskID))

{

vm.GanttTaskList.Add(new GanttTask { UnderlyingTask = task });

ids.Add(task.IPlanTaskID);

}

this.ganttView.TasksSource = vm.GanttTaskList;

vm.RaisePropertyChanged(nameof(vm.GanttTaskList));

}

GanttView

asked on 06 Sep 2018

1 answer

174 views

How to hide TimeRuler and

How do I hide the Time Ruler above the ScheduleView i.e. the TimeRulerItem and TimeRulerGroupItem?

I have tried the following:

<scheduleView:TimeRulerItemTemplateSelector x:Key="TimeRulerItemTemplateSelector">

<scheduleView:TimeRulerItemTemplateSelector.HorizontalTimelineMajorItemTemplate>

<DataTemplate>

<WrapPanel Background="{StaticResource Palette_7}">

<TextBlock Padding="5" Text="{Binding FormattedValue}"

Foreground="{StaticResource White_Colour}"

HorizontalAlignment="Stretch"

VerticalAlignment="Stretch"

FontSize="11"/>

</WrapPanel>

</DataTemplate>

</scheduleView:TimeRulerItemTemplateSelector.HorizontalTimelineMajorItemTemplate>

<scheduleView:TimeRulerItemTemplateSelector.HorizontalTimelineMinorItemTemplate>

<DataTemplate>

<WrapPanel Background="{StaticResource Palette_7}">

<!--<TextBlock Padding="5" Text="{Binding FormattedValue}"

Foreground="{StaticResource White_Colour}"

HorizontalAlignment="Stretch"

VerticalAlignment="Stretch"

FontSize="11"/>-->

</WrapPanel>

</DataTemplate>

</scheduleView:TimeRulerItemTemplateSelector.HorizontalTimelineMinorItemTemplate>

<scheduleView:TimeRulerItemTemplateSelector.HorizontalTimelineGroupTemplate>

<DataTemplate>

<WrapPanel Background="{StaticResource Palette_2}">

<TextBlock Padding="5" Text="{Binding FormattedValue}"

Foreground="{StaticResource White_Colour}"

HorizontalAlignment="Stretch"

VerticalAlignment="Stretch"

FontSize="14"

MinWidth="50"/>

</WrapPanel>

</DataTemplate>

</scheduleView:TimeRulerItemTemplateSelector.HorizontalTimelineGroupTemplate>

</scheduleView:TimeRulerItemTemplateSelector>

<Style TargetType="scheduleView:TimeRulerGroupItem" x:Key="TimeRulerGroupItemStyle">

<Setter Property="Visibility" Value="Collapsed"></Setter>

</Style>

<Style TargetType="scheduleView:TimeRulerItem" x:Key="TimeRulerItemHide">

<Setter Property="Visibility" Value="Collapsed"></Setter>

</Style>

<scheduleView:OrientedTimeRulerItemStyleSelector

HorizontalGroupItemStyle="{StaticResource TimeRulerGroupItemStyle}"

MajorHorizontalTickStyle="{StaticResource TimeRulerItemHide}"

MinorHorizontalTickStyle="{StaticResource TimeRulerItemHide}"

x:Key="TimeRulerItemStyleSelector">

</scheduleView:OrientedTimeRulerItemStyleSelector>

<telerik:RadScheduleView

TimeRulerItemTemplateSelector="{StaticResource TimeRulerItemTemplateSelector}"

TimeRulerItemStyleSelector="{StaticResource TimeRulerItemStyleSelector}"

</telerik:RadScheduleView>

But it causes incredibly weird behavior that has left me stumped. When I scroll it shows the time ruler but only half rendered and it only seems to apply the rule to some of the items. See the attached picture to see what I mean.

ScheduleView

answered on 06 Sep 2018

1 answer

180 views

Telerik RadRichTextbox Resources

I found an intriguing problem in my WPF application. I'm using the AssemblyResolve feature to manage dependencies on Telerik DLLs. So far everything works normally. Telerik.Windows. * DLLs, when prompted, are loaded and returned by the AssemblyResolve event. I noticed that in some situations, the requested name is terminated by ".resources". In this case the event returns null (procedure I checked on some forums).

The RadRichTextbox component is instantiated and loaded normally in my application. But I noticed that some functions do not work. For example the context menu on the document does not appear when triggered by the right mouse button. By performing some tests I found that when I put the Telerik.Windows.Controls.RichTextBoxUI.dll DLL in the same folder as my EXE, everything works perfectly. The context menu appears as expected.

Because the Telerik components use many dependencies, I would very much like to make them available in a specific directory. What am I doing wrong in my AssemblyResolve event? The procedure to return null when the event is triggered with the name ".resources" is correct?

RichTextBox

answered on 06 Sep 2018

0 answers

58 views

limit the number of characters in the search text

Hello

I have a gridview with text search activated.

How could i limit the number of characters that can be entered in TextSearch?

<telerik:RadGridView Name="rgvExplorador"

GridLinesVisibility="Both"

GroupPanelBackground="LightGray"

GroupPanelForeground="Black"

ShowSearchPanel="True"

ShowGroupPanel="False"

d:LayoutOverrides="Height"

Grid.Row="1"

FontSize="10.667"

CanUserResizeColumns="False"

CanUserFreezeColumns="False"

AutoGenerateColumns="False"

SelectionMode="Single"

ItemsSource="{Binding}"

RowIndicatorVisibility="Collapsed"

GroupRenderMode="Flat"

GroupRowIsExpandedChanged="rgvExplorador_GroupRowIsExpandedChanged">

GridView

asked on 06 Sep 2018

5 answers

388 views

WPF Application with Fluent Theme

Is there a working sample WPF project that uses the Fluent Theme for our reference? We are having some difficulties integrating the theme into our application.

General Discussions

answered on 06 Sep 2018