VNC with the Remote Framebuffer Protocol - The Definitive Guide to HTML5 WebSocket - page 123

// position
event.appendUint16(e.offsetX);
event.appendUint16(e.offsetY);

sendBytes($this, event.consume(event.length));
}

Listing 6-14 indicates that when mouse motion is detected, a mouse event is sent to
the VNC server.

Listing 6-14. Mouse Event to the VNC Server

$prototype.mouseMoveHandler = function($this, e) {
doMouseEvent($this, e);
}

Similarly, when a mouse click is detected, the button that was clicked is transmitted
as a mouse event, as shown in Listing 6-15.

Listing 6-15. Transmitting a Mouse Click as a Mouse Event

$prototype.mouseDownHandler = function($this, e) {
if (e.which == 1) {
// left click
$this.buttonMask ^= 1;
} else if (e.which == 3) {
// right click
$this.buttonMask ^= (1<<2);
}
doMouseEvent($this, e);
}

Table 6-2 describes the mouse event types that are relevant to the RFB event
listeners.

Table 6-2. Mouse Event Types

Event Type Description

mousedown Indicates that the pointing device was pressed down over

an element

mouseup Indicates that the pointing device was released over an element

mouseover Indicates that the pointing device is over an element

mousemove Indicates that the pointing device is moved while it is over

an element