rleft(

rleft(RECTANGLE

)
The** rleft( **function extracts the position of the left edge of a rectangle (see rectangle(, Graphic Coordinates).

**Parameters**

This function has one parameter:

** rectangle** – is the rectangle you want to get information about.

**Description**

This function returns the position of the left edge of the rectangle (in points). This position is expressed as a floating point number.

**Error Messages**

** rleft( function requires a binary parameter.** – The input to this function must be a binary value generated by the

**See Also**

- adjustxy( -- adjusts the four corners of a rectangle. However, only corners that are inside a boundary are adjusted. Corners outside the boundary are left alone.
- bestfitrectangle -- fits a rectangle within a boundary rectangle, enlarging or reducing as necessary to produce the best fit without changing the proportions.
- bestfitrectangle( -- fits a rectangle within a boundary rectangle, enlarging or reducing as necessary to produce the best fit without changing the proportions.
- calcenclosingrectangle -- will calculate the rectangle surrounding all of the specified objects.
- getbutton -- retrieves the coordinates of the last button that was pressed (in global screen co-ordinates).
- getclick -- returns the location of the mouse in global coordinates (coordinates from the top left corner of the screen).
- getinternalbutton -- retrieves the coordinates of the last button that was pressed (in form relative coordinates).
- getlocalbutton -- retrieves the coordinates of the last button that was pressed (in window relative coordinates).
- getlocalclick -- returns the location of the most recent mouse click in local coordinates (coordinates from the top left corner of the current form).
- h( -- extracts the horizontal position from a point (see point(, Graphic Coordinates).
- info("availablescreenrectangle") -- returns a rectangle defining the edges of the main screen, including the menu bar and dock (if visible).
- info("formxy") -- returns a point that indicates how much the current form is scrolled (if at all).
- info("screenrectangle") -- returns a rectangle defining the edges of the main screen.
- inrectangle( -- checks to see if a point is inside a rectangle.
- integralpoint( -- converts point coordinates to integers.
- integralrectangle( -- converts rectangle coordinates to integers.
- intersectionrectangle( -- creates a rectangle by combining two rectangles. The new rectangle is the area where the two rectangles overlap (if any).
- maprectangle( -- maps the position and size of a rectangle within a template rectangle into the same relative position and size within a goal rectangle.
- Modifiable Object Properties -- describes the properties of graphic objects that can be modified by a program (dimensions, color, font, title, etc.).
- moveobjects -- will move an object or group of objects up, down, left or right on the form.
- nsrect( -- defines a rectangle using the same parameter order as the Cocoa NSMakeRect( function.
- nsrectstr( -- converts a rectangle into text in the format x,y,width,height
- pinrectangle( -- pins a rectangle within the bounds of a larger rectangle.
- point( -- combines vertical and horizontal co-ordinates into a single number that describes the position of a point (see Graphic Coordinates).
- pointstr( -- converts a point value into text in the format v,h (for example 34,56).
- rbottom( -- extracts the position of the bottom edge of a rectangle (see rectangle(, Graphic Coordinates).
- rectangle( -- defines a rectangle from four dimensions.
- rectangleadjust( -- adjusts all four edges of a rectangle independently
- rectanglealign( -- aligns a small rectangle at one of nine positions within a larger rectangle.
- rectanglecenter( -- adjusts a rectangle so that it is centered inside of another rectangle.
- rectangleinset( -- insets a rectangle by a specified amount.
- rectangleoffset( -- offsets a rectangle to a new position.
- rectanglesize( -- defines a rectangle from its upper left hand corner and its width and height.
- rectanglesizestr( -- converts a rectangle into text in the format *top,left,height,width*.
- rectanglestr( -- converts a rectangle into text in the format *top,left,bottom,right*.
- rectangletweak( -- transforms a rectangle by changing its position and/or size.
- rheight( -- extracts the height of a rectangle (see rectangle(, Graphic Coordinates).
- rright( -- extracts the position of the right edge of a rectangle (see rectangle(, Graphic Coordinates).
- rtop( -- extracts the position of the top edge of a rectangle (see rectangle(, Graphic Coordinates).
- rwidth( -- extracts the width of a rectangle (see rectangle(, Graphic Coordinates).
- setrectangleheight( -- changes the height of a rectangle, leaving the width unchanged.
- setrectanglesize( -- changes the height and width of a rectangle, leaving the position of the top left hand corner unchanged.
- setrectanglewidth( -- changes the width of a rectangle, leaving the height unchanged.
- setrectedges -- changes the edges of the specified rectangle.
- unionrectangle( -- creates a rectangle by combining two rectangles. The new rectangle is large enough to exactly cover both of the input rectangles.
- v( -- returns the vertical position of a point (see point(, Graphic Coordinates).
- xytoxy( -- converts a point or rectangle from one co-ordinate system to another.

**History**

Version | Status | Notes |

10.0 | Updated | This function returns a floating point number (Panorama 6 and earlier versions returned an integer value). |