recalculate zoom when changing font size

frontend/ui/data/koptoptions.lua

@@ -102,10 +102,11 @@ KoptOptions = {
 				item_text = {"Aa","Aa","Aa","Aa","Aa","Aa","Aa","Aa","Aa","Aa"},
 				item_align_center = 1.0,
 				spacing = 15,
+				height = 60,
 				item_font_size = {22,24,28,32,34,36,38,42,46,50},
 				values = {0.1, 0.2, 0.4, 0.6, 0.8, 1.0, 1.2, 1.6, 2.0, 4.0},
 				default_value = 1.0,
-				height = 60,
+				event = "FontSizeUpdate",
 			},
 			{
 				name = "font_fine_tune",

frontend/ui/reader/readerview.lua

@@ -304,9 +304,7 @@ end
 function ReaderView:onToggleScrollMode(page_scroll)
 	self.page_scroll = page_scroll
 	self:recalculate()
-	if self.page_scroll then
-		self.ui:handleEvent(Event:new("InitScrollPageStates"))
-	end
+	self.ui:handleEvent(Event:new("InitScrollPageStates"))
 end
 
 function ReaderView:onReadSettings(config)
@@ -360,19 +358,20 @@ function ReaderView:onGammaUpdate(gamma)
 	end
 end
 
+function ReaderView:onFontSizeUpdate()
+	self.ui:handleEvent(Event:new("ReZoom"))
+end
+
 function ReaderView:onDefectSizeUpdate()
 	self.ui:handleEvent(Event:new("ReZoom"))
-	self.ui:handleEvent(Event:new("InitScrollPageStates"))
 end
 
 function ReaderView:onPageCrop()
 	self.ui:handleEvent(Event:new("ReZoom"))
-	self.ui:handleEvent(Event:new("InitScrollPageStates"))
 end
 
 function ReaderView:onMarginUpdate()
 	self.ui:handleEvent(Event:new("ReZoom"))
-	self.ui:handleEvent(Event:new("InitScrollPageStates"))
 end
 
 function ReaderView:onSetViewMode(new_mode)

frontend/ui/reader/readerzooming.lua

@@ -157,6 +157,7 @@ end
 
 function ReaderZooming:onReZoom()
 	self:setZoom()
+	self.ui:handleEvent(Event:new("InitScrollPageStates"))
 	return true
 end