Bugs item #1255804, was opened at 2005-08-10 13:29
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Category: Scintilla
Group: Cosmetic
Status: Open
Resolution: None
Priority: 5
Submitted By: Blair McGlashan (blairmcg)
Assigned to: Nobody/Anonymous (nobody)
Summary: Caret/dwell timer continues to fire when focus lost
Initial Comment:
As soon as Scintilla first gains focus it starts a timer to
implement cursor flashing, and also dwell notifications.
This is a 100mS timer, but of course the cursor is
invalidated less frequently. When Scintilla loses focus,
the timer is not cancelled, and the timer continues to
fire, invalidating the cursor even when it is not visible.
There is a small, but unecessary, CPU load for this*,
but perhaps more importantly it means that anyone
using Remote Desktop Connection or Terminal
Services, or similar, may be creating uncessary network
traffic in needless redrawing.
*In fact when hosted in a container that subclasses the
control, the cost of the timers firing might be
significantly higher.
I think the fix is to modify Editor::DropCaret as follows:
void Editor::DropCaret() {
caret.active = false;
--> SetTicking(false);
InvalidateCaret();
}
The indicated line being inserted. I'm not sure what
effect this will have on the dwell stuff though, as I don't
fully understand what it is doing. I did notice, however,
that dwell events can be received when the view does
not have focus as a result of the background timers, and
this doesn't seem right to me.
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