ScrollBox Element Callback Example

ScrollBoxElementCallbackDemo.lua

local ScrollableListButtonMixin = CreateFromMixins(CallbackRegistryMixin);
ScrollableListButtonMixin:GenerateCallbackEvents(
    {
        "OnClickThreeTimes",
    }
);

function ScrollableListButtonMixin:OnLoad()
    CallbackRegistryMixin.OnLoad(self);
    self:SetScript("OnClick", self.OnClick);
end

function ScrollableListButtonMixin:Init(elementData)
    self.clickCount = 0;
    self:SetText(elementData);
end

function ScrollableListButtonMixin:OnClick(button, down)
    self.clickCount = Wrap(self.clickCount + 1, 3);

    if self.clickCount == 3 then
        self:TriggerEvent("OnClickThreeTimes", self:GetElementData(), button, down);
    end
end

---

ScrollableButtonListMixin = {};

function ScrollableButtonListMixin:OnLoad()
    self.DataProvider = CreateDataProvider();
    self.DataProvider:InsertTable({ "Button 1", "Button 2", "Button 3", "Button 4", "Button 5" });

    self.ScrollView = CreateScrollBoxListLinearView();
    self.ScrollView:SetDataProvider(self.DataProvider);
    self.ScrollView:SetElementExtent(21);
    self.ScrollView:SetElementInitializer("Button", "UIPanelButtonTemplate", GenerateClosure(self.OnElementInitialize, self));
    self.ScrollView:SetElementResetter(GenerateClosure(self.OnElementReset, self));

    -- Not using a scrollbar for this demo.
    self.ScrollBox = CreateFrame("Frame", nil, self, "WowScrollBoxList");
    self.ScrollBox:SetAllPoints(self);
    self.ScrollBox:Init(self.ScrollView);
end

function ScrollableButtonListMixin:OnElementInitialize(button, elementData, isNew)
    if isNew then
        Mixin(button, ScrollableListButtonMixin);
        button:OnLoad();
    end

    button:Init(elementData);
    button:RegisterCallback("OnClickThreeTimes", self.OnElementClickThreeTimes, self);
end

function ScrollableButtonListMixin:OnElementReset(button)
    button:UnregisterCallback("OnClickThreeTimes", self);
end

function ScrollableButtonListMixin:OnElementClickThreeTimes(elementData, button, down)
    print("Clicked a button three times!", elementData, button, down);
end

---

ScrollableButtonList = Mixin(CreateFrame("Frame", nil, UIParent), ScrollableButtonListMixin);
ScrollableButtonList:OnLoad();
ScrollableButtonList:SetPoint("CENTER");
ScrollableButtonList:SetSize(200, 55);