GridControlBase

[Stefan Tsalapatis]

Hi,

I have derived a class from GridControl
which does everything I want for a
light editable Grid implementation.
I have read your newer help text in class GridControlBaseImp which explains
the differences of GridControlBase -
GridControlBaseImp -GridControl.

QUESTION 1:
I would like if possible to derive my class from GridControlBase.
My code seems ok except I override
OnColWidthsChanged
OnQueryColWidth ( GridControl)
Is there any equivalent functions in
GridControlBase ?

Question 2:
From your Help :
"GridControlBase... you need to manually initialize MouseControllers and cell types. "
Can you remind me if there is any sample with such code or do you have any in your site ?

Thanks

Regards
Stefan

[Administrator]

similar in your derived GridControlBase.

To initialize the mouse controllers, take a look at the code in

C:\Program Files\Syncfusion\Essential Suite\3.0.1.0\Windows\Grid.Windows\Src\Extensions\Control\GridControlBaseImp.cs(146):		protected override void InitializeMouseControllers()

To initialize celltypes, you call Model.CellModels.Add for the celltypes you want to use.

[Stefan Tsalapatis]

Thanks ,

But as for the first question
the overridable
OnColWidthsChanged
OnQueryColWidth
exist only in a GridControl.

In GridControlBase Source I can see
only
private ModelRowHeightsChanged
ModelColWidthsChanged

Do you mean to subscribe to events
Model.ColWidthsChanged
Model.QueryColWidth

I will do this.

[Administrator]

Part of my response did not make it to the post.

The OnColWidthsChanging methods in GridControl just wrapper methods for calling a handler for Model.ColWidthsChanging. What I was trying to suggest is that you could add the same code to your derived GridControlBase class to wrapped to a Model.ColwidthsChanging event handler.

[Stefan Tsalapatis]

Hi,

I have set the MouseControllers in
a GridControlBase.
(only the base controllers)
But I have a problem that does not seem
related to specific controllers .

I had implemented in a special grid
to change the row background color
when the mouse hovers in another row
mousemove event ->
PointToRowCol
ClearSelections
SelectRange(row)

With ControlBaseImp the above works.
Not with ControlBase

Regards

[Administrator]

Exactly what fails?

Can you select a range of cells with the mouse (to verify the cellselection controller is hooked up)?

If you upload a sample project showing the problem, we can try to work with it here?

[Stefan Tsalapatis]

See the sample GridControlBase1_1839.zip

[Administrator]

The rows are not being invalidated so that is why you do not see the selections. Try this code in your GridControlBase class.

int oldRow = -1;
protected override void OnMouseMove(System.Windows.Forms.MouseEventArgs e)
{  
	int row, col;
	Point pt = new Point(e.X, e.Y);
	PointToRowCol(pt, out row, out col);
	Selections.Clear();
	Selections.SelectRange(GridRangeInfo.Row(row), true);
	if(oldRow > - 1)
		this.RefreshRange(GridRangeInfo.Row(oldRow));
	oldRow = row;
	this.RefreshRange(GridRangeInfo.Row(oldRow));
	base.OnMouseMove (e);
}

[Stefan Tsalapatis]

Thanks Clay , it works.