[zork]

Check this screenshot:


It shows the OverrideActionBar and the MainMenuBar both visible at the same time.

There seems to be no more BonusActionBar that swaps in the vehicle buttons on the MainMenuBar in the background.

I think Blizzard removed the bonusactionbar completly. Even actionbar switches based on form/stance seem to be gone.

Example: A warlock with Metharmorphosis...If you go into the stance the ActionBar stays the same but what does change are the ActionButtons itself.

So bar swapping based on stance/form seems to be gone. Thus the workaround with page swapping and actionbutton re-mapping can be removed (afaik).

Currently digging into it.

What's disturbing is that the PossesActionBarFrame is still alive. Not sure under which condition it can be spawned...(DK start quest orb was one of it afaik...need to test that later)

What I found is the ActionBarController.lua

function ActionBarController_UpdateAll()
    PossessBar_Update();
    StanceBar_Update();
    CURRENT_ACTION_BAR_STATE = LE_ACTIONBAR_STATE_MAIN;
    
    -- If we have a skinned vehicle bar or skinned override bar, display the OverrideActionBar
    if ((HasVehicleActionBar() and UnitVehicleSkin("player") and UnitVehicleSkin("player") ~= "")
    or (HasOverrideActionBar() and GetOverrideBarSkin() and GetOverrideBarSkin() ~= "")) then
        -- For now, a vehicle has precedence over override bars (hopefully designers make it so these never conflict)
        if (HasVehicleActionBar()) then
            OverrideActionBar_Setup(UnitVehicleSkin("player"), GetVehicleBarIndex());
        else
            OverrideActionBar_Setup(GetOverrideBarSkin(), GetOverrideBarIndex());
        end
        
        CURRENT_ACTION_BAR_STATE = LE_ACTIONBAR_STATE_OVERRIDE;
    -- If we have a non-skinned override bar of some sort, use the MainMenuBarArtFrame
    elseif ( HasBonusActionBar() or HasOverrideActionBar() or HasVehicleActionBar() or HasTempShapeshiftActionBar() ) then
        if (HasVehicleActionBar()) then
            MainMenuBarArtFrame:SetAttribute("actionpage", GetVehicleBarIndex());
        elseif (HasOverrideActionBar()) then
            MainMenuBarArtFrame:SetAttribute("actionpage", GetOverrideBarIndex());
        elseif (HasTempShapeshiftActionBar()) then
            MainMenuBarArtFrame:SetAttribute("actionpage", GetTempShapeshiftBarIndex());
        elseif (HasBonusActionBar() and GetActionBarPage() == 1) then
            MainMenuBarArtFrame:SetAttribute("actionpage", GetBonusBarIndex());
        else
            MainMenuBarArtFrame:SetAttribute("actionpage", GetActionBarPage());
        end
        
        for i=1, NUM_ACTIONBAR_BUTTONS do
            local button = _G["ActionButton"..i];
            ActionButton_UpdateAction(button);
        end
    else
        -- Otherwise, display the normal action bar
        ActionBarController_ResetToDefault();
    end
    
    ValidateActionBarTransition();
end

From OverrideActionBar.lua

function OverrideActionBar_Setup(skin, barIndex)
    OverrideActionBar_SetSkin(skin);
    OverrideActionBar_CalcSize();
    OverrideActionBar:SetAttribute("actionpage", barIndex);
    
    for k=1,MAX_ALT_SPELLBUTTONS do
        local button = OverrideActionBar["SpellButton"..k];
        ActionButton_UpdateAction(button);
        local _, spellID = GetActionInfo(button.action);
        if spellID and spellID > 0 then
            button:SetAttribute("statehidden", false);
            button:Show();
        else
            button:SetAttribute("statehidden", true);
            button:Hide();
        end
    end
    
    if HasVehicleActionBar() then
        OverrideActionBarHealthBar:Show();
        OverrideActionBarPowerBar:Show();
    else
        OverrideActionBarHealthBar:Hide();
        OverrideActionBarPowerBar:Hide();
    end
 
    OverrideActionBar:RegisterEvent("PLAYER_LEVEL_UP"); 
    OverrideActionBar:RegisterEvent("PLAYER_XP_UPDATE");
    
    OverrideActionBar_UpdateXpBar();
end

From ActionButton.lua

function ActionButton_UpdateAction (self)
    local action = ActionButton_CalculateAction(self);
    if ( action ~= self.action ) then
        self.action = action;
        SetActionUIButton(self, action, self.cooldown);
        ActionButton_Update(self);
    end
end