Questions on UI for WPF Forum

1 answer

112 views

Hi,

In my control (ScheduleView with WeekViewDefinition), I alway displaying from monday to friday and from 8:00AM to 6:00PM for each day (each day can have 1 ou 2 resource). For each cell, I need to create a SpecialSlot and of course, I need to add available appointments. When the user navigate through each weeks, I need to recreate the same pattern but this pattern seem's to take a huge amount of time and the application freeze between each week rendering.

Actually, I set the SpecialSlotsSourceand the AppointmentsSource to null before the rendering and I assign my collections to the control after the special slots and the appointments was created.

Can you gave me some hints to accelerate my week generation?

Thank's
Alain

ScheduleView

answered on 06 May 2014

2 answers

457 views

Boolean column with a converter

Hello,
I have a GridView that contains a column bound to a Boolean value.
I want that the value is not displayed with the default check box, so I wrote a converter that displays a check mark only when the value is true.

If I use the converter only on the DataContext, the column is still displayed with the standard check box:

DataContext="{Binding IsTeamMate, Converter={StaticResource BooleanToCheckMark}}"

To have the column displayed normally, I had to define a cell template:

<tk:GridViewDataColumn DataContext=

"{Binding IsTeamMate, Converter={StaticResource BooleanToCheckMark}}"

                       Header="Already played"

IsGroupable="False"

ShowFieldFilters="False"

UniqueName="IsTeamMate"

Width="30">

<tk:GridViewDataColumn.CellTemplate>

<DataTemplate>

<TextBlock Text="{Binding IsTeamMate, Converter={StaticResource BooleanToCheckMark}}" />

</DataTemplate>

</tk:GridViewDataColumn.CellTemplate>

</tk:GridViewDataColumn>

Is it a normal behavior or is there another way to display the column correctly ?

GridView

answered on 06 May 2014

2 answers

159 views

e.OldData != e.NewData despite the same string value

Hello, basically in the event handler "CellEditEnded", I would like to check if the old cell value is the same as the new cell value.
e.OldData == e.NewData returns true if I completely don't touch the cell values.

However, if I for example, add something to the cell, and delete it again BACK to the same value, then e.OldData == e.NewData return false.
(Example - original value: test --> typed 's' to become 'tests' --> backspace again to become 'test' which is back to the same value.
Setting breakpoints does show that e.OldData and e.NewData still have the same value, but somehow no longer equal.

e.OldData.ToString() and e.NewData.ToString() works, however, there will be exception if the column is binded to any non-string datatype (such as int / datetime etc). Is there any workaround for this? Thanks for your attention.

GridView

answered on 06 May 2014

2 answers

81 views

Vertical Orientation

I was wondering if anyone has done any work in showing the RadTimeBar in a vertical orientation? Every example I have seen shows it in a horizontal layout, and I don't see anything that would allow me to show it vertical. Am I overlooking it somewhere, or is it not currently a feature?

Thanks
Paul

TimeBar

answered on 06 May 2014

3 answers

221 views

Bad experince with RadComboBox and IsEditable

Hello,
i have some trouble with the RadComboBox control.

Window is Loaded, see Screenshot 001
I clicked in RadComboBox, see Screenshot 002
I typed in "14" and pressed Enter, see Screenshot 003

I clicked again in RadComboBox and I have severell problems. (see Screenshot 004)

Marked Text cannot be overriden
DropDown doesn't show up, even if I clicked clear
No caret appears

The Code is very minimalistic
<Window x:Class="RadComboBoxSample.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:telerik="http://schemas.telerik.com/2008/xaml/presentation"
        Title="MainWindow" Height="220" Width="220">
    <Window.Resources>
        <Style x:Key="RadComboBoxContentUserControlStyle" TargetType="telerik:RadComboBox">
            <Setter Property="Margin" Value="10" />
            <Setter Property="Padding" Value="10" />
            <Setter Property="HorizontalAlignment" Value="Stretch" />
            <Setter Property="IsReadOnly" Value="True" />
            <Setter Property="IsEditable" Value="True" />
            <Setter Property="IsFilteringEnabled" Value="True" />
            <Setter Property="CanAutocompleteSelectItems" Value="True" />
            <Setter Property="CanKeyboardNavigationSelectItems" Value="True" />
            <Setter Property="OpenDropDownOnFocus" Value="True" />
            <Setter Property="TextSearchMode" Value="Contains" />
            <Setter Property="ClearSelectionButtonVisibility" Value="Visible" />
            <Setter Property="ClearSelectionButtonContent" Value="Clear" />
            <Setter Property="EmptyText" Value="Please select" />
        </Style>
    </Window.Resources>
    <Grid>
        <Grid.RowDefinitions>
            <RowDefinition Height="Auto" />
            <RowDefinition />
        </Grid.RowDefinitions>
        <Grid.ColumnDefinitions>
            <ColumnDefinition Width="Auto" MinWidth="200" />
            <ColumnDefinition />
        </Grid.ColumnDefinitions>
        <telerik:RadComboBox Grid.Column="0" Grid.Row="0" Style="{StaticResource RadComboBoxContentUserControlStyle}">
            <telerik:RadComboBoxItem Content="14 - Car" />
            <telerik:RadComboBoxItem Content="15 - Airplane" />
            <telerik:RadComboBoxItem Content="16 - Boat" />
            <telerik:RadComboBoxItem Content="17 - Bike" />
        </telerik:RadComboBox>
    </Grid>
</Window>

ComboBox

answered on 06 May 2014

0 answers

63 views

VsibleRange question

Hi,

In my control actually I have a WeekViewDefinition which display from monday to friday, from 8 am to 9 pm with a minor tick length of 15 mins. In each cells I need to display a UserControl, one for the Appointment or one for the ReadOnly Slot. So filling the grid take a lot of time, approximately "00:00:00.42". I'm trying to find an event with the control where I can find which part of the data I need to load instead of loading the grid completly.

Can someone tell my if this kind of event exist or do I have to change my loading data approach?!?

Thank's
Alain

ScheduleView

asked on 05 May 2014

0 answers

77 views

VsibleRange question

Hi,

In my control, I have a WeekViewDefinition from monday to friday, from 8 am to 9 pm with a MinorTickLength of 15mins (with 2 resources). Each cells can be an appointment or a readonly slots. Each cell contain a UserControl, one UserControl for the appointment and another UserControl for the readonyl slot. Filling the grid take a lot of time (00:00:00.41 estimated) so I'm trying to find how I can fill only the visible parts and fill the none visible parts only when it's necessary like when the user scroll. Actually when the user click on the "Next week" or on the "Previous week" buttons, the control hang until all the data is displayed and react after that.

I need to know if the control have this kind of event to let my know the real visible area or do I have to change my approach to be more efficient?!?

Thank's
Alain

ScheduleView

asked on 05 May 2014

1 answer

165 views

Row Horizontal Grid Lines Disappear when Many Columns

Hello,

I've run into an issue where my Row Horizontal Grid Line is disappearing when I have many columns. I am not changing any styling. I do have Row and Column virtualization on though.

The issue occurs when I add at least 834 columns, not sure why 834 and that number could be higher if other environments. If I add only 833 columns to the grid the Row Horizontal Grid Line appears just fine. If I add 834 columns or more, the Row Horizontal Grid Line is gone.

Is there anything I can do to make sure that Horizontal Grid Line always shows?

Thank you.

GridView

answered on 05 May 2014

6 answers

331 views

DataLoaded Event Not Fired When Records Grouped

I have a grid bound to an ObservableCollection and the following code is used to add a new record to the collection then select the new record in the grid;

'Add the new object to the collection...

mcolStudents.Add(moStudent)

'Locate the record in the grid...

With gvStudents

For Each item As StudentView In .Items

If item.StudentId = moStudent.StudentId Then

.SelectedItem = item

.ScrollIntoView(item)

Exit For

End If

Next

End With

This works perfectly unless the user has grouped the records. When the records are grouped the new record is not added to the grid and the code to locate the record in the grid doesn't locate the new record.

I have also confirmed the grid DataLoaded event doesn't fire if the records are grouped but does fire otherwise. There are no filters applied to the grid.

What do I have to do to force the grid to load and display the record?

GridView

answered on 05 May 2014

11 answers

807 views

Rich Text Box Performance Issue

Hello

We've observed that with the amount of text typed in rich text box, it becomes very slow. If it has good amount of content then typing a small text takes even a minute or two. Same thing happens when you try to delete characters. This eventually makes the application screen load very-very slow where this control is used.

We're using Telerik RichTextBox in our application. Version - 2012.1.0326.40. Are you aware if performance is already known issue with Rich Text Box control? Do you have any suggestions?

Thanks
Manoj

RichTextBox

answered on 05 May 2014