Wiley-World.of.Warcraft.Programming.A.Guide.and.Reference.for.Creating.WoW.Addons

Chapter 12 ■ Interacting with Widgets 213The last two are special buttons that register automatically for all releasebutton clicks and down button clicks, respectively.Once you’ve registered for clicks, you can set an OnClick script on the frameto receive the click events. When the client calls an OnClick handler, it passesthe following arguments:self—The frame object that the handler was called for.button—A string indicating which mouse button was used to click theframe.down—A Boolean flag indicating if the mouse click was triggered by adownward click, rather than the releasing of a click.You can run the following code in-game to play with the different mousebuttons and the release/press portions of a click. Click the game button withmultiple buttons on your mouse to see the differences between them. Also,click and hold the button so you can see the difference between the ‘‘up’’ and‘‘down’’ portions of a click.if not ClickFrame thenClickFrame = CreateFrame(“Button“, “ClickFrame“, UIParent, i“GameMenuButtonTemplate“)endClickFrame:ClearAllPoints()ClickFrame:SetPoint(“CENTER“, 0, 0)ClickFrame:SetText(“Click Frame“)ClickFrame:RegisterForClicks(“AnyUp“, “AnyDown“)ClickFrame:SetScript(“OnClick“, function(self, button, down)local name = self:GetName()print(name, button, down)end)You should see a line of output added to your chat frame showing the nameof the frame, ClickFrame, and the button that was clicked along with whetheror not the click captured was on the release of the click.Creating a Close Button Using TemplatesBecause almost every window in the default user interface has a close button,naturally there is a template you can use to save some time. After the tag in the definition for BagBuddy, add the following definition: