tests/projects/wiimote/wxglade_hmi@wxglade_hmi/pyfile.xml
author Edouard Tisserant <edouard.tisserant@gmail.com>
Wed, 05 Oct 2022 16:10:17 +0200
branchwxPython4
changeset 3617 c3aae4c95bc1
parent 3416 53c66c4aefa3
permissions -rw-r--r--
Runtime: work around 1s delay added when using twisted reactor's callLater.

Since wxPython4, using wxReactor from non-main thread was producing
exceptions in wxWidget's C++ code. Then reactor.run() was called from
main thread, and runtime's worker was delegating calls to reactor
with callLater(0, callable).

While this worked perfectly with wxReactor, it did introduce an unexplained
1 second delay to each worker call when using nomal linux reactors
(i.e. without wxPython). As a workaround reactor runs in a thread when using
twisted without wxPython
<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<PyFile>
  <variables/>
  <globals>
<![CDATA[
from threading import Thread

def OnConnectButton(self, event):
  def OnWiiConnected(mac_addr):
    self.label_2.SetLabel(
      "Wiimote %s connected"%mac_addr 
      if mac_addr else 
      "Wiimote connection failed !")

  def WiiConnected(mac_addr):
    wx.CallAfter(OnWiiConnected,mac_addr)

  Thread(target = Connect_Wiimote, args = (WiiConnected,)).start()
  self.label_2.SetLabel("Press wiimote 1+2")
  event.Skip()

def OnDisconnectButton(self, event):
  Disconnect_Wiimote()
  self.label_2.SetLabel("Wiimote disconnected")
  event.Skip()

]]>
  </globals>
  <init>
<![CDATA[
]]>
  </init>
  <cleanup>
<![CDATA[
]]>
  </cleanup>
  <start>
<![CDATA[
]]>
  </start>
  <stop>
<![CDATA[
]]>
  </stop>
</PyFile>