How to get save dialog box when closing the app without saving data

General
1

How to get save dialog box when closing the app without saving data

2

Set your window dirty, then in the CancelClosing Event, put code to ask the user if (s)he want to save or drop changes:

https://documentation.xojo.com/api/user_interface/desktop/desktopwindow.html.CancelClosing

3

Yeah, in the past there was a tutorial project made by Xojo (or their former name) which creates a text editor application.

The window may closes w/o asking for Save dialog box, except:
if the user typed something in, the flag (or: boolean variable) was set to “dirty”, or “It’sEditedNow” (true), so when closing that window, a SaveDialog box would appear.

4

Rough principals:

  • Use the .Changed property of the DesktopWindow class to indicate if the data loaded into that window has changed and needs to be saved.
  • When you load data set .Changed to false.
  • When the user changes data set .Changed to true.
  • Add a CancelClose event to your window. In that event event check if the .Changed property and offer to save if required.

In CancelClose you should offer a few options:

  • An option to save the changes
  • An option to close the window anyway without saving the changes.
  • An option to cancel the close and continue using the app, you can achieve this by returning false from the event.
5

Close (no pun intended). You must return true instead :wink:

6

True, you must :slight_smile:

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