API Region SetPointedit

From WoWWiki

Sets an attachment point of an UI component.

obj:SetPoint(point, relativeFrame, relativePoint, ofsx, ofsy);
obj:SetPoint(point, relativeFrame, relativePoint);
obj:SetPoint(point, ofsx, ofsy);
obj:SetPoint(point);

Contents 1 Arguments 1.1 Points 2 Examples 3 Details 3.1 Edge definitions

Arguments

point 

String - Point of the object to adjust based on the anchor.

relativeFrame 

String/Widget - Name of, or reference to, a frame to attach obj to; defaults to the object's parent (or the screen, if object has no parent) if nil or omitted.

relativePoint 

String - point of the relativeFrame to attach point of obj to. If not specified, defaults to the value of point.

ofsx 

Number - x-offset (negative values will move obj left, positive values will move obj right), defaults to 0 if not specified.

ofsy 

Number - y-offset (negative values will move obj down, positive values will move obj up), defaults to 0 if not specified.

Points

There are nine valid point values:

• "TOP", "RIGHT" "BOTTOM" "LEFT": the center-points of the respective sides.
• "TOPRIGHT", "TOPLEFT", "BOTTOMLEFT", "BOTTOMRIGHT": corners of the frame rectangle.
• "CENTER": the center point of the frame rectangle.

Examples

The following are all equivalent.

MainMenuBar:SetPoint("BOTTOMLEFT", "UIParent", "BOTTOMLEFT", 0, 0);
MainMenuBar:SetPoint("BOTTOMLEFT", UIParent, "BOTTOMLEFT", 0, 0);
MainMenuBar:SetPoint("BOTTOMLEFT", "UIParent", "BOTTOMLEFT");
MainMenuBar:SetPoint("BOTTOMLEFT", "UIParent");

The following is equivalent to the above, given that the parent frame of MainMenuBar is UIParent.

MainMenuBar:SetPoint("BOTTOMLEFT");
MainMenuBar:SetPoint("BOTTOMLEFT", 0, 0);

Details

• Behavior of this function with multiple anchors is complex. Generally, you can override points by setting them again (so repeated assignment to the "TOPLEFT" point of a frame would move the frame, unless other anchor points interfere). If you're repositioning a frame, call obj:ClearAllPoints() to eliminate unwanted interactions.
• Offset units are relative to the screen's effective scale. WoW's screen always has a height of 768 units, while screen width varies with aspect ratio.
• ofsx and ofsy must both be passed as arguments for either to take effect; they default to 0 only when neither is given. That is, foo:SetPoint(bar, 40) will ignore the 40 rather than treat it as (+40,+0).

Edge definitions

The edge "points" (TOP, RIGHT, BOTTOM, LEFT) are not actual points, but... edges. To fully define a region position using edges alone, you will need to define all four (as opposed to using corners, where you only need two) edges.

Therefore, defining an edge does not necessarily place a region relative to the center of that edge (For example, if you define TOP and RIGHT, the region will be placed at the TOPRIGHT corner). However, by default a region is "pulled" to the center if the number of points defined is insufficient.

Example:

Region:ClearAllPoints();
Region:SetPoint("TOP", relativeframe);
Region:SetWidth(100);
Region:SetHeight(100);

will place Region to the top center of the relativeframe while adding a

Region:SetPoint("RIGHT", relativeframe);

will place Region in the top right corner and now Region is fully defined.