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JohnSummit
Joined: 10 Apr 2008
Posts: 32
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 Posted: Sun Jul 12, 2009 4:01 am Post subject: How to change the background of a whole row? |
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It seems the only way to change the background of cells in a row is to implement the GetCellData event and put in code similar to this:
| Code: |
private void virtualTree1_GetCellData(object sender, GetCellDataEventArgs e)
{
// get the default binding for the given row and use it to populate the cell data
RowBinding binding = virtualTree1.GetRowBinding(e.Row);
binding.GetCellData(e.Row, e.Column, e.CellData);
if (e.Row.Item is SomeType)
{
e.CellData.OddStyle.BackColor = Color.BlueViolet;
e.CellData.EvenStyle.BackColor = Color.BlueViolet;
}
}
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This, however, doesn't change the color of the whole row, only the cells background. Is there a way to change the background similar to how the current row is marked? |
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Infralution
Joined: 28 Feb 2005
Posts: 5027
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| Posted: Sun Jul 12, 2009 11:42 pm Post subject: |
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To change the whole row color you need to handle both the GetRowData and the GetCellData methods. Note that you should not just set the BackColor of the existing style - since this will affect all rows/cells that use the current style. Instead you need to create a new derived style. See the following FAQ on this topic:
http://www.infralution.com/phpBB2/viewtopic.php?t=419
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Infralution Support |
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JohnSummit
Joined: 10 Apr 2008
Posts: 32
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| Posted: Mon Jul 13, 2009 12:07 am Post subject: |
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| Thank you very much. Works well. |
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JohnSummit
Joined: 10 Apr 2008
Posts: 32
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| Posted: Mon Jul 13, 2009 4:09 am Post subject: String alignment lost when applying copy of cell/row style. |
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I'm noticing that the string alignment is lost when applying a copy of cell/row style. This is the code i'm using to copy the cell style and change the background to a shade of yellow:
| Code: |
private void virtualTree1_GetCellData(object sender, GetCellDataEventArgs e)
{
//////////////////////////////////////////
// Marker hi-lighting code.
//////////////////////////////////////////
TreeNodeObject treeNodeObject = e.Row.Item as TreeNodeObject;
if (treeNodeObject.Marker != null)
{
if (m_markerCellDataStyle == null)
{
m_markerCellDataStyle = new Infralution.Controls.Style(e.CellData.OddStyle);
m_markerCellDataStyle.BackColor = Color.LightYellow;
}
e.CellData.EvenStyle = m_markerCellDataStyle;
e.CellData.OddStyle = m_markerCellDataStyle;
}
}
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The same code is used for the row stuff:
| Code: |
private void virtualTree1_GetRowData(object sender, GetRowDataEventArgs e)
{
//////////////////////////////////////////
// Marker hi-lighting code.
//////////////////////////////////////////
TreeNodeObject treeNodeObject = e.Row.Item as TreeNodeObject;
if (treeNodeObject.Marker != null)
{
if (m_markerRowDataStyle == null)
{
m_markerRowDataStyle = new Infralution.Controls.Style(e.RowData.OddStyle);
m_markerRowDataStyle.BackColor = Color.LightYellow;
}
e.RowData.EvenStyle = m_markerRowDataStyle;
e.RowData.OddStyle = m_markerRowDataStyle;
}
}
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One of my cells has the string alignment centered but is aligned left (near) after the new style is assigned. Could you tell me where to re-apply the string alignment?
Thanks. |
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Infralution
Joined: 28 Feb 2005
Posts: 5027
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| Posted: Mon Jul 13, 2009 4:43 am Post subject: |
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I assume that your code is still calling
| Code: | RowBinding binding = virtualTree1.GetRowBinding(e.Row);
binding.GetCellData(e.Row, e.Column, e.CellData); |
but you have omitted that in your post?
I think the problem is that you are only creating m_MarkerCellDataStyle once - however this won't work if the original parent cell styles are different - since you will end up with all cells formatted with the one style.
In this case you probably need to bite the bullet and simply create a new style for each cell ie:
| Code: | Style style = new Style(e.CellData.OddStyle);
style.BackColor = Color.LightYellow;
e.CellData.OddStyle = style;
e.CellData.EvenStyle = style; |
This isn't as bad on performance as you might think because .NET memory management is very efficient when it comes to allocating new objects.
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JohnSummit
Joined: 10 Apr 2008
Posts: 32
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| Posted: Tue Jul 14, 2009 2:31 am Post subject: |
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| Thanks. I ended up creating a new style for each row / cell and the text alignment is now preserved. |
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