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error 404 flushEvents | revDocs | RunRev
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Version
flushEvents
Basics
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Type
Function
Syntax
flushEvents(eventType)
Introduced
1.0
Environment
Desktop,Server
Platform Support
MacOS,Mac OS X,Windows,Linux
Security
None required
Summary
Clears pending events from the event queue so they will not trigger handlers.
Examples

put flushEvents("activate") into trashVar
get flushEvents("all")

Additional Comments
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Use the flushEvents function to prevent unwanted messages from being sent during a handler's execution.

Parameters:

The eventType is one of the following:

all: ignore all waiting events

mouseDown: ignore mouse presses

mouseUp: ignore mouse releases

keyDown: ignore keypresses

keyUp: ignore key releases

autoKey: ignore key repeats

disk: ignore disk-related events

activate: ignore windows being brought to the front

highLevel: ignore Apple Events (on Mac OS and OS X systems)

system: ignore operating system events

Value:

The flushEvents function always returns empty.

Comments:

Typically, you use the flushEvents function in a handler to dump user actions that have occurred during the handler. For example, if a button has a mouseUp handler that takes a few seconds to run, the user might click again during that time. To prevent those extra clicks from causing the handler to run again, use the flushEvents function:

on mouseUp

-- ...lengthy handler goes here...

-- get rid of clicks since the handler started:

put flushEvents("mouseUp") into temp

end mouseUp

To clear multiple event types, call the flushEvents function once for each event type you want to clear.

Although some of the eventTypes have the same names as built-in Revolution messages, there is a distinction. For example, the mouseDown event type is the operating system's response to the user clicking the mouse button. When the operating system sends this event to the application, Revolution sends a mouseDown message to the target object. The expression flushEvents(mouseDown) prevents the application from responding to any mouseDown events it has received from the operating system, but has not yet processed.

User Comments
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