How to highlight a specific day? | Infragistics Forums

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How to highlight a specific day?

Achim posted over 12 years ago

Hi there,

I am using the UltraTimeLineView and want to highlight a specific day that can be changed by the user (it is some kind of insert function where the user has to know where the insert operation will be applied). This works for me in the main area of the timeline by setting the DayLook of that day. But I also want to highlight the header.

Therefore I used the ColumnHeaderInitializing and I am facing two problems:

1. I can only change the color of the header text and the text itself... the other properties of the AppearanceData object are ignored.

2. I cannot trigger the ColumnHeaderInitializing event based on a user action like the click on a button. Also .Invalidate() and .Refresh() have no effect on the control.

Is anybody out there to help me with this issues? It's also ok for me to user other solutions (e.g. DrawFilter) if they work...

Kind regards

Achim

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Offline [Infragistics] Boris Toromanov posted over 12 years ago

Hello Achim,

Could you please post a screenshot where I could see what you are able to change and what you are not. This might indeed need a drawfilter implementation.

Why do you want to trigger this event based on a user action? What is not refreshing in the control when you are trying to invalidate or refresh it?

I will be waiting for your feedback.
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Aaron Lang posted over 11 years ago in reply to [Infragistics] Boris Toromanov

The code seems to work for the entire date column if I add this section:

if (el.Parent is TimeSlotUIElement)
{
if (((TimeSlotUIElement)el.Parent).DateTimeRange.StartDateTime.Day == newDay)
{
Brush brush = Brushes.Goldenrod;
drawParams.Graphics.FillRectangle(brush, drawParams.Element.Rect);
return true;
} return false;
}

The only issue is that it does not paint the cell in the top row that does not have an owner assigned to it.

Any ideas?
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140

Achim posted over 12 years ago in reply to [Infragistics] Boris Toromanov

Hello Boris,

currently I am using this ColumnHeaderInitialize implementation:

private void ultraTimelineView1_ColumnHeaderInitializing(object sender, ColumnHeaderInitializingEventArgs e)

{

if (e.DateTimeRange.StartDateTime.Date == ultraDateTimeEditor1.DateTime.Date)

{

e.AppearanceData = new AppearanceData { ForeColor = Color.Blue, TextHAlign = HAlign.Right };

e.Text = "X";

}

}

As you can see in the screenshot, this leads to a blue "X" in the timeline. Other attributes of the AppearanceData object do not have any effect on the timeline.

And the other issue is that I need to change this "mark" when the user changes the date and clicks the button (as you can see in this example).

I already tried to use a DrawFilter but I haven't found out the DrawElement to use for modifying the timeline items.

To answer your questions explicitly:

>>Why do you want to trigger this event based on a user action?

This should be an essential application feature. The user can "insert" events on the timeline and I want to show the position where the insert operation will work.

>>What is not refreshing in the control when you are trying to invalidate or refresh it?

Nothing is refreshing in the control. When I change the date and press the button nothing happens with .Invalidate() or .Refresh() calls in the button click event handler. The timeline is only redrawn when I hover the timeline items with the mouse or scrolling the whole control.

Best regards

Achim
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