Difference between Form.Deactivate and Form.Leave
-
I'm not sure I understand the difference between these two events (Form.Deactivate and Form.Leave). Could someone enlighten me please?
Occurs when the form loses focus and is no longer the active form.
(When the title-bar of the form changes from blue to gray)
Occurs when the input focus leaves the control.
(When the cursor focusses another control/window)
Bastard Programmer from Hell :suss:
-
Occurs when the form loses focus and is no longer the active form.
(When the title-bar of the form changes from blue to gray)
Occurs when the input focus leaves the control.
(When the cursor focusses another control/window)
Bastard Programmer from Hell :suss:
-
Alright thanks, but isn't that pretty much the same thing? I'm talking specifically about a form, not just any control. So "when the cursor focusses another form", isn't that precisely when the form's title-bar changes from blue to grey?
Yup. The active form is usually the one with input-focus (fails sometime when apps modify the z-order). Hence, if the input-focus moves to a different form, the new form will should be activated. Even if the validation would fail and the focus retained - the active form would be the one with focus.
Bastard Programmer from Hell :suss:
-
Yup. The active form is usually the one with input-focus (fails sometime when apps modify the z-order). Hence, if the input-focus moves to a different form, the new form will should be activated. Even if the validation would fail and the focus retained - the active form would be the one with focus.
Bastard Programmer from Hell :suss:
-
OK, thanks. So, am I correct that, as regards Forms, there is no difference between Form.Deactivate and Form.Leave?
Well, there is, otherwise one of both would be redundant. Imagine you open a form, has focus. Now I click once on a tray-icon. Just tried it, and the form raises the
Deactivateevent, not theLeaveevent; the form still has the input-focus (for your app, and will continue there when it's activated again).Bastard Programmer from Hell :suss:
-
Alright thanks, but isn't that pretty much the same thing? I'm talking specifically about a form, not just any control. So "when the cursor focusses another form", isn't that precisely when the form's title-bar changes from blue to grey?
No, it's not. It's entirely possible to have a form deactived, but the focus never really leaves the confines of the form. I know, it's rare, but it happens... It's also possible to have the focus leave the form, but never deactivate the form by clicking on someone outside of it. What you do with those events is up to you.
A guide to posting questions on CodeProject[^]
Dave Kreskowiak