feat: add API to change focus on showing a screen

sonic-radiance.love/birb/modules/gui/elements/parent.lua

@@ -58,8 +58,8 @@ function GuiElement:setVisibility(visibility)
     self.isVisible = visibility
 end
 
-function GuiElement:getFocus()
-    self.gui:setFocus(self.name)
+function GuiElement:getFocus(widgetId, page)
+    self.gui:setFocus(self.name, widgetId, page)
 end
 
 function GuiElement:haveFocus()
@@ -72,6 +72,10 @@ function GuiElement:looseFocus()
     end
 end
 
+function GuiElement:setSubFocus()
+    -- Useless for basic element
+end
+
 -- UPDATE FUNCTIONS
 -- Update the menu every game update
 

sonic-radiance.love/birb/modules/gui/menus/parent.lua

@@ -122,6 +122,13 @@ function Menu:back()
   self:resetView()
 end
 
+function GuiElement:setSubFocus(widgetId, pageName)
+  if (pageName ~= nil) then
+    self.widget:switch(pageName)
+  end
+  self.widget:trySelectWidget(widgetId)
+end
+
 -- ACTION FUNCTIONS
 -- Send actions to the widgets
 

sonic-radiance.love/birb/modules/gui/mixins/elements.lua

@@ -17,11 +17,14 @@ function ElementList:deleteElement(name)
     self.elements[name] = nil
 end
 
-function ElementList:setFocus(name)
+function ElementList:setFocus(name, widgetId, page)
     assert(self:elementExists(name), "Element " .. name .. " doesn't exists")
     self:storeLastFocus()
     self.focusedElement = name
     self.elements[name].isVisible = true
+    if (widgetId ~= nil) then
+        self.elements[name]:setSubFocus(widgetId, page)
+    end
 end
 
 function ElementList:removeFocus()

sonic-radiance.love/birb/modules/gui/screen/init.lua

@@ -17,6 +17,8 @@ function GuiScreen:new(name)
     self:reset()
     self:registerElements()
     self.gui:addScreen(name, self)
+
+    self.defaultFocus = nil
 end
 
 function GuiScreen:initWrapper()
@@ -32,19 +34,20 @@ function GuiScreen:update(dt)
     self.tweens:update(dt)
 end
 
-function GuiScreen:show()
-    self:showSimple()
-    --TODO: show parent if we show directly the child
+function GuiScreen:show(focusElement, widgetId, page)
+    self:showSimple(focusElement, widgetId, page)
     if (self.set ~= nil) then
         self.set.owner:show()
     end
 end
 
-function GuiScreen:showSimple()
+function GuiScreen:showSimple(focusElement, widgetId, page)
+    focusElement = focusElement or self.defaultFocus
+    local time = 0
     if (not self.isVisible) then
         self.isVisible = true
         if (self.transforms["show"] ~= nil) then
-            self:playTransform("show")
+            time = self:playTransform("show")
         end
 
         if (self.subscreens ~= nil) then
@@ -54,6 +57,10 @@ function GuiScreen:showSimple()
         if (self.set ~= nil) then
             self.set:setCurrentScreen(self.name)
         end
+
+        if (focusElement) then
+            self.tweens:newFunc(time, "focus", function () self.gui:setFocus(focusElement, widgetId, page) end)
+        end
     end
 
 end