changing a CellValuePresenterStyle at runtime

630

Chris posted over 14 years ago

I have managed to work out (thanks to examples) how to change a cells background, and other properties based on data trigger. Conditional formatting etc...

I have an unbound field that displays an image. Based on a cell value I wish to either change the image or change the cellValuePresenterStyle to point to another style. For example is cell value = x then use cellpresenterstyle x, if y then use cellpresenterstyle y

The code looks messy in this here but no so if you take it out and into VS

I have this xaml for the unbound field:

<Style TargetType="{x:Type igDP:CellValuePresenter}" x:Key

="UserImage1">

<Setter Property

="Template">

<Setter.Value

<ControlTemplate TargetType="{x:Type igDP:CellValuePresenter

}">

<Grid Width="50" Height

="50">

<Image

Margin="0"

HorizontalAlignment

="Center"

VerticalAlignment

="Top"

Source="{StaticResource BuddyBlue}" Width="50" Height

="50"/>

</Grid

</ControlTemplate

</Setter.Value

</Setter

</Style

This is my unbound field xaml from the grid:

<igDP:UnboundField Name="UserImage" Label

="UserImage">

<igDP:Field.Settings

<igDP:FieldSettings CellMinWidth="50" CellWidth="50"

CellValuePresenterStyle="{StaticResource UserImage1

}" />

</igDP:Field.Settings

</igDP:UnboundField

This is how I manage my changes to the foreground and background properties:

public

winUsers()

{

InitializeComponent();

Title =

"Users"

;

xamDataCarousel1.DataSource = GetUsers().DefaultView;

xamDataCarousel1.FieldLayoutInitialized +=

new EventHandler<Infragistics.Windows.DataPresenter.Events.FieldLayoutInitializedEventArgs

>(xamDataCarousel1_FieldLayoutInitialized);

}

void xamDataCarousel1_FieldLayoutInitialized(object sender, Infragistics.Windows.DataPresenter.Events.FieldLayoutInitializedEventArgs

{

//Get the CarName field

Field idField = e.FieldLayout.Fields["Name"

];

//Create the style in code behind

Style s = new Style(typeof(CellValuePresenter

));

//Create DataTrigger

DataTrigger trigger1 = new DataTrigger

();

//Create a Setter

Setter setter1 = new Setter(CellValuePresenter.BackgroundProperty, Brushes

.Red);

Setter setter2 = new Setter(CellValuePresenter.ForegroundProperty, Brushes

.White);

//Create a Binding

Binding binding = new Binding("Cells[SomeValue].Value"

);

//Set the trigger properties

trigger1.Value =

"X"

;

trigger1.Binding = binding;

//Add the setter in the trigger

trigger1.Setters.Add(setter1);

trigger1.Setters.Add(setter2);

//Add the trigger in the style

s.Triggers.Add(trigger1);

idField.Settings.CellValuePresenterStyle = s;

}

560

Patrick posted over 13 years ago in reply to John Doe

Hi, i have a similar problem, when i change the value of the cell, i call the

CellUpdated Event

In this event, i will set a new CellValuePresenter, but in my Grid it
 isn´t affected to the cell. Any Idea?

Here is my code:


void presenter_CellUpdated(object sender, CellUpdatedEventArgs e)
{
 if (e.Field.Label.Equals("thefield"))
            {
                Style bla = SchemaPresenter.FindResource("ManualCellChangedStyle") as Style;
        
                e.Field.Settings.CellValuePresenterStyle = bla;
            }
        }

69686

John Doe posted over 14 years ago

Hello,

I think it would be best to change the source of the Image inside the CVP rather than changing the whole style. You can do this by creating triggers inside the control template which will change the Source property of the Image with setters. If you want to do this in code ,you would have to Template bind the Source property of the Image to some other property outside the template - for example Record.Tag, or the CVP, or the Value of the Cell. By changing this value, the source of the image will change accordingly.
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