save and restore tree expand state

[johnc]

Hi,

I have an application with a tree control. When the application quits, I save the tree data to a file and repopulate the tree when the application next starts.

I'd also like to be able to save the expand/collapse state of each branch. Is there a simple, global way to do this?

Cheers,

John.

[jared]

You could use SavePanelState and RecallPanelState for this. These functions will take a snap shot of the values of all the controls on your panel and save that data to a file you specify. The "value" of a tree control is pretty much the whole state of the tree control, including the items and their expanded/collapsed state. Since this function saves the state of the whole panel, and you may only want to save the state of the tree control, you could create a temporary panel at the beginning and end of your program that you copy the tree control to and then save and recall the state of that temporary panel.

I've attached a sample program that demonstrates SavePanelState and RecallPanelState.

Hope this helps,

- jared

[johnc]

Thanks, Ill take a look at this.

John