Undo multi-level like VS.NET

[Sebastien Lange]

Is there a sample somewhere that show how to develop a multi-level undo?
I know I have to create my custom popup.
Your VS.NET sample in the showcase shows it but I do not see any code sample.

[Administrator]

I have attached a modified TextEditorForm.cs in our XPMenus sample that now has a undo-popup like the one you see in the VS.Net sample. Start looking at the "undoPopup" in the source.

Do let me know if you have any trouble with this sample.

-Praveen Ramesh

[Sebastien Lange]

There were just 2 errors with the PopupControlContainer that does not accept 1 argument:
this.undoPopup = new Syncfusion.Windows.Forms.PopupControlContainer();//(this.components);
this.popupControlContainer1 = new Syncfusion.Windows.Forms.PopupControlContainer();//(this.components);

Thanks, that's exactly what I was looking for.
Sebastien

[Administrator]

Thanks, you are welcome.

-Praveen Ramesh

[Sebastien Lange]

Hi,

There is a small bug in the XPMenus sample, with the multiple undo.
When you click to undo one action, you unselect this action so you should add:

private void undoList_MouseDown(object sender, System.Windows.Forms.MouseEventArgs e)
{
int index = this.undoList.IndexFromPoint(e.X, e.Y);
if(index != -1)
this.undoList.SetSelected(index, true);
}

Sebastien

[Sebastien Lange]

That's not finished;-)

If your stack contains more than 15 elements, you will not have the possibility to select more than 15 (the topindex is reset).
You should change:

private void undoList_MouseMove(object sender, System.Windows.Forms.MouseEventArgs e)
{
int index = this.undoList.IndexFromPoint(e.X, e.Y);
if(index != -1)
{

for(int i = index; i >= 0; i--)
this.undoList.SetSelected(i, true);

for(int i = index + 1; i < this.undoList.Items.Count; i++)
this.undoList.SetSelected(i, false);

index++;
this.undoLabel.Text = "Undo " + index.ToString() + " Actions.";
}
}

by

private void undoList_MouseMove(object sender, System.Windows.Forms.MouseEventArgs e)
{
int index = this.undoList.IndexFromPoint(e.X, e.Y);
if(index != -1)
{
int topIndex = this.undoList.TopIndex;
this.undoList.BeginUpdate();

for(int i = index; i >= 0; i--)
this.undoList.SetSelected(i, true);

for(int i = index + 1; i < this.undoList.Items.Count; i++)
this.undoList.SetSelected(i, false);

this.undoList.TopIndex = topIndex;
this.undoList.EndUpdate();

index++;
this.undoLabel.Text = "Undo " + index.ToString() + " Actions.";
}
}

Begin & EndUpdate to avoid to much flashing but... this is not enough.
Any idea to definitely remove this flash?

Sebastien