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package mouse
import (
"machine"
"machine/usb/hid"
)
var Mouse *mouse
type Button byte
const (
Left Button = 1 << iota
Right
Middle
Back
Forward
)
type mouse struct {
buf *hid.RingBuffer
button Button
waitTxc bool
}
func init() {
if Mouse == nil {
Mouse = newMouse()
hid.SetHandler(Mouse)
}
}
// New returns the USB hid-mouse port.
// Deprecated, better to just use Port()
func New() *mouse {
return Port()
}
// Port returns the USB hid-mouse port.
func Port() *mouse {
return Mouse
}
func newMouse() *mouse {
return &mouse{
buf: hid.NewRingBuffer(),
}
}
func (m *mouse) TxHandler() bool {
m.waitTxc = false
if b, ok := m.buf.Get(); ok {
m.waitTxc = true
hid.SendUSBPacket(b[:5])
return true
}
return false
}
func (m *mouse) RxHandler(b []byte) bool {
return false
}
func (m *mouse) tx(b []byte) {
if machine.USBDev.InitEndpointComplete {
if m.waitTxc {
m.buf.Put(b)
} else {
m.waitTxc = true
hid.SendUSBPacket(b)
}
}
}
// Move is a function that moves the mouse cursor.
func (m *mouse) Move(vx, vy int) {
if vx == 0 && vy == 0 {
return
}
if vx < -128 {
vx = -128
}
if vx > 127 {
vx = 127
}
if vy < -128 {
vy = -128
}
if vy > 127 {
vy = 127
}
m.tx([]byte{
0x01, byte(m.button), byte(vx), byte(vy), 0x00,
})
}
// Click clicks the mouse button.
func (m *mouse) Click(btn Button) {
m.Press(btn)
m.Release(btn)
}
// Press presses the given mouse buttons.
func (m *mouse) Press(btn Button) {
m.button |= btn
m.tx([]byte{
0x01, byte(m.button), 0x00, 0x00, 0x00,
})
}
// Release releases the given mouse buttons.
func (m *mouse) Release(btn Button) {
m.button &= ^btn
m.tx([]byte{
0x01, byte(m.button), 0x00, 0x00, 0x00,
})
}
// Wheel controls the mouse wheel.
func (m *mouse) Wheel(v int) {
if v == 0 {
return
}
if v < -128 {
v = -128
}
if v > 127 {
v = 127
}
m.tx([]byte{
0x01, byte(m.button), 0x00, 0x00, byte(v),
})
}
// WheelDown turns the mouse wheel down.
func (m *mouse) WheelDown() {
m.Wheel(-1)
}
// WheelUp turns the mouse wheel up.
func (m *mouse) WheelUp() {
m.Wheel(1)
}
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