CODEWITHSUNDEEP
c#winformsevents
Sabin Darkstone
Sabin Darkstone

Reputation: 51

Distinguishing between Click and DoubleClick events in C#

I currently have a NotifyIcon as part of a Windows Form application. I would like to have the form show/hide on a double click of the icon and show a balloon tip when single clicked. I have the two functionalities working separately, but I can't find a way to have the app distinguish between a single click and double click. Right now, it treats a double click as two clicks.

Is there a way to block the single click event if there is a second click detected?

Upvotes: 4

Views: 6965

Answers (3)

dkostas
dkostas

Reputation: 85

It is enough to register a Click event and then handle single and double clicks from it.

    int clickCount;
    async void NotifyIcon_Click( object sender, EventArgs e ) {
        if( clickCount > 0 ) {
            clickCount = 2;
            return;
        }
        clickCount = 1;
        await Task.Delay( SystemInformation.DoubleClickTime );

        if( clickCount == 1 ) {
            // Process single click ...
        } else if( clickCount == 2 ) {
            // Process double click ...
        }
        clickCount = 0;
    }

Upvotes: 1

Ivan Stoev
Ivan Stoev

Reputation: 205819

Unfortunately the suggested handling of MouseClick event doesn't work for NotifyIcon class - in my tests e.MouseClicks is always 0, which also can be seen from the reference source.

The relatively simple way I see is to delay the processing of the Click event by using a form level flag, async handler and Task.Delay :

bool clicked;

private async void OnNotifyIconClick(object sender, EventArgs e)
{
    if (clicked) return;
    clicked = true;
    await Task.Delay(SystemInformation.DoubleClickTime);
    if (!clicked) return;
    clicked = false;
    // Process Click...
}

private void OnNotifyIconDoubleClick(object sender, EventArgs e)
{
    clicked = false;
    // Process Double Click...
}

The only drawback is that in my environment the processing of the Click is delayed by half second (DoubleClickTime is 500 ms).

Upvotes: 9

Andrew Goacher
Andrew Goacher

Reputation: 381

There are 2 different kinds of events.

Click/DoubleClick

MouseClick / MouseDoubleClick

The first 2 only pass in EventArgs whereas the second pass in a MouseEventArgs which will likely allow you additional information to determine whether or not the event is a double click.

so you could do something like;

obj.MouseClick+= MouseClick;
obj.MouseDoubleClick += MouseClick;
// some stuff

private void MouseClick(object sender, MouseEventArgs e)
{
    if(e.Clicks == 2) { // handle double click }
}

Upvotes: 7

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