# HG changeset patch
# User Goffi <goffi@goffi.org>
# Date 1576841377 -3600
# Node ID 51520ce981544eb966bba3b853b6a539382279d4
# Parent  dddea9684a8e07c7d797b52f3e662415382906a6
common_widgets (DelayedBoxLayout), chat: don't delay layout on new message:

DelayedBoxLayout has a new `dont_delay_next_layouts` property to skip delaying for the
next X sizing. This is used in chat widget to avoid unpleasant flickering when a new
message is sent or received.

diff -r dddea9684a8e -r 51520ce98154 cagou/core/common_widgets.py
--- a/cagou/core/common_widgets.py	Fri Dec 20 12:29:37 2019 +0100
+++ b/cagou/core/common_widgets.py	Fri Dec 20 12:29:37 2019 +0100
@@ -39,14 +39,20 @@
 
     do_layout_event = properties.ObjectProperty(None, allownone=True)
     layout_delay_s = properties.NumericProperty(0.2)
+    #: set this to X to force next X layouts to be done without delay
+    dont_delay_next_layouts = properties.NumericProperty(0)
 
     def do_layout(self, *args, **kwargs):
         if self.do_layout_event is not None:
             self.do_layout_event.cancel()
-        real_do_layout = super().do_layout
-        self.do_layout_event = Clock.schedule_once(
-            lambda dt: real_do_layout(*args, **kwargs),
-            self.layout_delay_s)
+        if self.dont_delay_next_layouts>0:
+            self.dont_delay_next_layouts-=1
+            super().do_layout()
+        else:
+            real_do_layout = super().do_layout
+            self.do_layout_event = Clock.schedule_once(
+                lambda dt: real_do_layout(*args, **kwargs),
+                self.layout_delay_s)
 
 
 class Identities(object):
diff -r dddea9684a8e -r 51520ce98154 cagou/plugins/plugin_wid_chat.py
--- a/cagou/plugins/plugin_wid_chat.py	Fri Dec 20 12:29:37 2019 +0100
+++ b/cagou/plugins/plugin_wid_chat.py	Fri Dec 20 12:29:37 2019 +0100
@@ -559,6 +559,9 @@
 
     def createMessage(self, message):
         self.appendMessage(message)
+        # we need to render immediatly next 2 layouts to avoid an unpleasant flickering
+        # when sending or receiving a message
+        self.messages_widget.dont_delay_next_layouts = 2
 
     def appendMessage(self, mess_data):
         """Append a message Widget to the history