Questions on UI for WPF Forum

5 answers

200 views

Problem with custom column type

I have defined a custom grid view column type:

public class GridViewButtonColumn : GridViewBoundColumnBase {

public static readonly DependencyProperty ButtonBackgroundProperty = . . .

public static readonly DependencyProperty ButtonForegroundProperty = . . .

public Brush ButtonBackground {

get { return (Brush) GetValue( ButtonBackgroundProperty ); }

set { SetValue( ButtonBackgroundProperty, value ); }

}

public Brush ButtonForeground {

get { return (Brush) GetValue( ButtonForegroundProperty ); }

set { SetValue( ButtonForegroundProperty, value ); }

}

public GridViewButtonColumn() {

this.EditTriggers = GridViewEditTriggers.None;

}

public override FrameworkElement CreateCellElement( GridViewCell cell, object dataItem ) {

Cell = cell;

CellButton = new Button();

CellButton.Click += new RoutedEventHandler( CellButton_Click );

CellButton.CommandParameter = dataItem;

Binding contentBinding = new Binding( "Content" ) {

Source = this,

Mode = BindingMode.TwoWay

};

CellButton.SetBinding( Button.ContentProperty, contentBinding );

Binding backgroundBinding = new Binding( "ButtonBackground" ) {

Source = this,

Mode = BindingMode.TwoWay

};

CellButton.SetBinding( Button.BackgroundProperty, backgroundBinding );

Binding foregroundBinding = new Binding( "ButtonForeground" ) {

Source = this,

Mode = BindingMode.TwoWay

};

CellButton.SetBinding( Button.ForegroundProperty, foregroundBinding );

if ( CellButtonVisibility != null ) {

CellButton.SetBinding( Button.VisibilityProperty, CellButtonVisibility );

}

if ( this.DataMemberBinding != null ) {

SetBinding( ContentProperty, this.DataMemberBinding );

}

GridViewRow row = cell.ParentRow as GridViewRow;

row.SetBinding( GridViewRow.DetailsVisibilityProperty, new Binding( "Visibility" ) {

Source = CellButton,

Mode = BindingMode.TwoWay

} );

return CellButton;

}

void CellButton_Click( object sender, RoutedEventArgs e ) {

Button btn = sender as Button;

DataRetentionPolicy policy = btn.DataContext as DataRetentionPolicy;

RoutedEventArgs newEventArgs = new ButtonColumnRoutedEventArgs( ClickEvent, policy );

RaiseEvent( newEventArgs );

}

Here's the xaml where I'm using it:

<telerik:RadGridView AutoExpandGroups="True"

AutoGenerateColumns="False"

Background="{DynamicResource DataBackground}"

CanUserDeleteRows="False"

CanUserFreezeColumns="False"

CanUserInsertRows="False"

CanUserResizeColumns="False"

CanUserSortColumns="True"

EnableColumnVirtualization="True"

EnableRowVirtualization="True"

FontSize="16"

FontWeight="Bold"

Foreground="{DynamicResource DataForeground}"

Grid.Column="1"

Grid.ColumnSpan="2"

Grid.Row="1"

IsReadOnly="True"

ItemsSource=

"{Binding Path=DataRetentionPolicies, Mode=TwoWay, RelativeSource={RelativeSource AncestorType={x:Type cs:AdvancedSettingEditor}}}"

Margin="5"

Name="DataPolicies"

SelectionUnit="FullRow"

ScrollMode="Deferred"

ScrollViewer.CanContentScroll="True"

ScrollViewer.HorizontalScrollBarVisibility="Auto"

ScrollViewer.VerticalScrollBarVisibility="Auto"

ShowGroupFooters="True"

TabIndex="8"

ToolTip="Data Maintenance Properties"

Visibility=

"{Binding Converter={StaticResource BoolToVisibility}, Mode=TwoWay, Path=EnableRetention, RelativeSource={RelativeSource AncestorType={x:Type cs:AdvancedSettingEditor}}}"

>

<telerik:RadGridView.Columns>

<cs:GridViewButtonColumn ButtonBackground="{DynamicResource ButtonBackground}"

ButtonForeground="{DynamicResource ButtonForeground}"

Click="EditButton_Click"

Content="Edit"

FontSize="16"

FontWeight="Bold"

Width="75" />

</telerik:RadGridView.Columns>

</telerik:RadGridView>

The DynamicResources called ButtonBackground and ButtonForeground are SolidColorBrush resources defined in app.xaml.I have recently implemented themes in my application. When the themes change, the colors of these resources, along with others, change.

When the custom column is first displayed, the button colors are correct, but when the the theme changes, the colors aren't changing. How do I fix this problem?

Tony

GridView

answered on 04 Apr 2012

1 answer

130 views

Scroll performance

Bit of a long shot, but is there any way of improving the performance when scrolling through larger documents?

I may be totally wrong, but I'd hazard a guess that the only parts of the document that are loaded and rendered are those that are in the View Port, and any scrolling results in the bits off screen having to be drawn. This would help memory useage, but explain the slight jerkiness in scrolling. Evidentally a compromise is to render a page or two either side.

RichTextBox

answered on 04 Apr 2012

0 answers

93 views

Problem with Raise GridView SortingEvent after restore via PersistenceManager

Hi

I have form include GridView that user can change column visibility, size, sort, etc. and then save layout using PersistenceManager.
Because I implement custom paging, in Sorting event, i get sorted data from server.
all process work fine. but when restore layout using PersistenceManager, Column that user already sorted on it restore and data sorted in local mode, not server mode.

Therefore if GridView Sorting event raise automatic or manual after restore layout, my problem will be solved.

Note: I also using below code, but not work:

lstGridView.ForEach(p =>

{

if (p.SortDescriptors != null && p.SortDescriptors.Count > 0)

{

p.RaiseEvent(new GridViewSortingEventArgs((p.SortDescriptors[0] as ColumnSortDescriptor).Column, SortingState.None, SortingState.Ascending) {

RoutedEvent = RadGridView.SortingEvent,

Source = this

});

}

});

Could you please help me.

GridView

asked on 04 Apr 2012

1 answer

126 views

Menu stays open aften menu item has been clicked

Hi telerik,

When I activate menu items, the menu stays open.

Specifically, I add menu items through code to maintain a 'recent files' list in the File menu. Clicking the menu item activates functionality correctly, but menu stays open. All menu items inserted through xaml seems to work correctly.

It would appear it has already been reported long time ago:
http://www.telerik.com/community/forums/wpf/menu/radmenu-visible-after-onclick-event-fires.aspx
(Can't see any comments about being resolved?)

I can live with it, if I can somehow force the menu to go away but much fidling around with enabled, visibility even removal of the entire menu and re-inserting it has proved not to work. Do you have any suggestions for such a work-around?

Thanks,

Anders, Denmark

Menu

answered on 04 Apr 2012

5 answers

207 views

TileView Resize

Quick question:
Is there a way to resize the tiles at will ? Possibly by dragging a left-mouse cursor on the edges of the tiles. This will give flexiblity beyond the 3 fixed size of minimized, maximized, and restored.

TileView

answered on 04 Apr 2012

7 answers

233 views

Dropdown style controls in RadWindow

Any type of control which has a drop down, like ComboBox, Listbox become hidden when clicked within a RadWindow.
It seems to happen on Windows XP machines.

If you set the radwindow to IsTopMost then the combobox is visible, but I do not want to use this method.
I have tried a lot of things, but with no success. (including setting zindex)

Is this a bug with radwindow, and is there a workaround? I am using mvvm, so would rather not have to do any code behind.

Window

answered on 04 Apr 2012

0 answers

145 views

Set GridViewRows to Readonly

Hello,

I wanted to set a few rows in my grid to readonly...I did not see the Readonly property for a row...
I got a piece of code which successfully disable my rows....but it's nt exactly what i wanted.

Code :

public void MakeExistingRowsReadOnly()

{

if (this.Items.ItemCount != 0)

{

for (int i = 0; i < this.Items.Count; i++)

{

GridViewRow currentrow = (GridViewRow)this.ItemContainerGenerator.ContainerFromItem(this.Items[i]);

if (!currentrow.Equals(null))

{

currentrow.IsEnabled =

false;

}

With this code...it disables the rows completely. The user can copy a cell etc.
what i want to achieve ios that...when the user is in the add mode...certain rows only are ReadOnly whereby he won't be able to enter values in that row. But he can copy data from the Readonly rows, can navigate etc.

Right now with this code, navigation and copying the data has been lost.

Can anyone please help...How can we make rows Readonly...without losing other features?

Regards
Shaimaa

GridView

asked on 04 Apr 2012

1 answer

217 views

RadTabItem object not found until it is selected or gets focus

Our scenario is as follows:

We have 4 tabitems for a RadTabControl (Tab1, Tab2, Tab3, Tab4) in this order and Tab1 is set as the selected tab when the RadTabControl is loaded for the first time.

The parent user control that wraps this RadTabControl when tries to find the Tab4 (without Tab4 set to focus or a manual user selection), the following code we run by in Framework is unable to locate it..

To reiterate the point, if that Tab4 is set as the first tab item or has focus or has a manual user selection - the same piece of code locates the Tab4.

private static T FindChild<T>(DependencyObject parent) where T : DependencyObject

{

for (int i = 0; i < VisualTreeHelper.GetChildrenCount(parent); i++)

{

DependencyObject child = VisualTreeHelper.GetChild(parent, i);

if (child != null && child is T)

return (T)child;

else

{

T childOfChild = FindChild<T>(child);

if (childOfChild != null)

return childOfChild;

}

return null;

}

Let us know if there is a property that we can apply for a specific RadTabItem to ensure the tabitem object is created as soon as the RadTabControl (as a container object) is created/loaded.

Thanks much
Kam Panchal

TabControl

answered on 04 Apr 2012

2 answers

169 views

[Solved] Deep content change doesn't work !

Hello,
Suppose we have this XAML :

<StackPanel>

<telerik:RadTransitionControl x:Name="tr1">

<Label x:Name="lblMessage"></Label>

</telerik:RadTransitionControl>

<Button Content="Button" Height="23" Name="button1" Width="75" Click="button1_Click" />

</StackPanel>

and when button1_Click has this code :

tr1.Content = DateTime.Now.ToString();

It works well.
But replacing it with this code :

lblMessage.Content = DateTime.Now.ToString();

causes the transition to not to work !

It seems that it only detects first layer changes in content and doesn't detect deep change.

So have I forgotten something here or its the nature of this control ?

Regards,

TransitionControl

answered on 04 Apr 2012

2 answers

173 views

Custom drop down on a Raddropdownbutton

Hi,
I am pretty new to WPF,i hav been cracking my head for a day and still no go ,
I need a grid view and some labels to appear in the popup.. while trying to keep the popup similar to the WPF demos..
Attaching a picture for refrence...

Thank you
Regards
Saneesh-B

Buttons

answered on 04 Apr 2012