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Add button release handler capability #53

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Add button release handler capability #53

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25 changes: 20 additions & 5 deletions comms.go
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Original file line number Diff line number Diff line change
Expand Up @@ -63,9 +63,10 @@ func RegisterDevicetype(

// Device is a struct which represents an actual Streamdeck device, and holds its reference to the USB HID device
type Device struct {
fd *hid.Device
deviceType deviceType
buttonPressListeners []func(int, *Device, error)
fd *hid.Device
deviceType deviceType
buttonPressListeners []func(int, *Device, error)
buttonReleaseListeners []func(int, *Device, error)
}

// Open a Streamdeck device, the most common entry point
Expand Down Expand Up @@ -137,12 +138,12 @@ func (d *Device) SetBrightness(pct int) error {
}

// GetButtonImageSize returns the size of the images to uploaded to the buttons
func (d* Device) GetButtonImageSize() image.Point {
func (d *Device) GetButtonImageSize() image.Point {
return d.deviceType.imageSize
}

// GetNumButtonsOnDevice returns the number of button this device has
func (d* Device) GetNumButtonsOnDevice() uint {
func (d *Device) GetNumButtonsOnDevice() uint {
return d.deviceType.numberOfButtons
}

Expand Down Expand Up @@ -198,6 +199,9 @@ func (d *Device) buttonPressListener() {
}
buttonMask[i] = true
} else {
if buttonMask[i] {
d.sendButtonReleaseEvent(int(i), nil)
}
buttonMask[i] = false
}
}
Expand All @@ -210,11 +214,22 @@ func (d *Device) sendButtonPressEvent(btnIndex int, err error) {
}
}

func (d *Device) sendButtonReleaseEvent(btnIndex int, err error) {
for _, f := range d.buttonReleaseListeners {
f(btnIndex, d, err)
}
}

// ButtonPress registers a callback to be called whenever a button is pressed
func (d *Device) ButtonPress(f func(int, *Device, error)) {
d.buttonPressListeners = append(d.buttonPressListeners, f)
}

// ButtonRelease registers a callback to be called whenever a button is released
func (d *Device) ButtonRelease(f func(int, *Device, error)) {
d.buttonReleaseListeners = append(d.buttonReleaseListeners, f)
}

// ResetComms will reset the comms protocol to the StreamDeck; useful if things have gotten de-synced, but it will also reboot the StreamDeck
func (d *Device) ResetComms() error {
payload := d.deviceType.resetPacket
Expand Down