the application lifetime, if settings must be stored persistently across runs, see [gdk.device_tool.DeviceTool.getSerial].
Returns
The current device tool
gdk.device_tool.DeviceTool getDeviceTool()Returns a [gdk.device_tool.DeviceTool] representing the tool that caused the event.
If the was not generated by a device that supports different tools (such as a tablet), this function will return null.
the application lifetime, if settings must be stored persistently across runs, see [gdk.device_tool.DeviceTool.getSerial].