Objects and Properties

This page contains an extensive listing of all Logo objects and their properties. Click “Start” to return to the beginning of a section, or “Top” to return to the top of this page.

Objects

PREFS	Logo Preferences
LOGO.ENV	General info about the environment
Panels:
Listener	The Listener Panel
Graphics	The Graphics canvas
Editor	The Logo Editor
Icon Bar	The Icon Bar
Widgets:	Objects below share these properties
Bitmaps
Turtles
Controls:
Buttons	Push bittons
Checkboxes	also Radio BUttons
Edit Fields
Static Text Fields
List Boxes	akso Popups
Sliders
Cameras
Robots:
InO-Bot	In-Bot, the floor robot

Properties

ATop Start
ALPHA		Controls the transparency of the colors the turtle uses to draw.
ANCHOR		Controls the anchoring of a widget.
ARRAYBASE		Controls the lowest array or grid index.
AUTOSAVE		Controls the amount of data that Logo saves and restores automatically.
AUTOSCROLL		Controls a vertical scroll bar.
BTop Start
BACKGROUND		Controls the background color of a control.
BATTERY		Reports the battery level of InO-Bot.
BGCOLOR		Controls the background color of the Graphics panel.
BGPATTERN		Controls the background pattern.
BORDER		Sets or reports the widget's border color.
BOUNDS		Reports the widget's size, depending on the scale and rotation.
BROWSER		Reports the browser name.
BUTTON		Reports the state of the mouse's buttons.
CTop Start
CALIBRATION		Controls InO-Bot's calibration factors for turns and movements.
CAMERA		Controls which camera is active.
CAMERAS		Outputs a list of camera names.
CASE		Makes Logo convert its input to upper case or not.
COLOR		Controls the text color of a control.
COLORED.TURTLES		Displays turtles with their pen color.
CONNECTOR		Controls InO-Bot's external connector.
CONTROLS.FONT		Controls the font used when creating a control.
CRAWL		Sets or reports the widget's crawl speed.
DTop Start
DEBUGGER		Controls the use of the Logo debugger.
DISTANCE		Reports InO-Bot's distance to an obstacle.
ETop Start
ENABLED		Enables or disables a widget.
ENVIRONMENT		Reports the device that Logo is executing upon.
FTop Start
FILTER		Gets or sets the edit field's input filter.
FONT		Controls the Listener font.
FONT		Sets or reports the widget's font.
FRONTLEFT		Reports the status of InO-Bot's front left obstacle sensor.
FRONTRIGHT		Reports the status of InO-Bot's front right obstacle sensor.
FROZEN		Reports TRUE if the graphics are frozen.
FULLSCREEN		Controls whether to have Terrapin Logo occupy the entire screen or
GTop Start
GLOW		Determines whether the widget's drop shadow appears as a glow effect.
HTop Start
HEADING		Controls the widget's heading.
ITop Start
INCREMENT		Controls the increment value when the slider is dragged.
INDEX		Controls the index of a selected list box item.
INFRARED		Controls InO-Bot's infrared sensor.
ITEMCOUNT		Reports the number of list box items.
ITEMS		Controls the contents of the listbox.
KTop Start
KEY		Reports the last key that the user has typed.
LTop Start
LBAPPEND		Appends one or more items to the list box.
LBCLEAR		Erases the contents of the list box.
LBFIND		Finds a list box item.
LBINSERT		Inserts one or more items into a list box.
LBITEM		Outputs a list box item by index.
LBREMOVE		Removes a list box item.
LBREPLACE		Replace a listbox item text.
LIGHT		Reports the status of InO-Bot's light sensor.
LIGHTS		Controls InO-Bot's headlights.
LIMIT		Limits the number of character that a user can enter into an edit box.
LINELEFT		Reports the status of InO-Bot's left line sensor.
LINERIGHT		Reports the status of InO-Bot's right line sensor.
LISTENER.LINES		Controls the maximum number of lines in the Listener panel.
LOCATION		Sets or reports the icon bar's location.
MTop Start
MAXIMUM		Controls the maximum value of the slider.
MINIMUM		Controls the minimum value of the slider.
MODIFIED		Reports whether the contents of an edit box have been modified.
MOUSE		Reports the position of the mouse.
NTop Start
NAME		Sets or reports the object's alias name.
NOISELEVEL		Reports InO-Bot's microphone noise level.
OTop Start
OFFSET		Controls the location of the Graphics panel's center point.
OPACITY		Controls the opacity value used for colors.
ORIGIN		Controls the origin of the widget's coordinate system.
ORIGINALNAME		Reports the widget's original name.
PTop Start
PATTERN		Reports or sets the current fill pattern.
PENCOLOR		Contains the current pen color.
PENSTATE		Controls the turtle's pen state.
PENWIDTH		Gets or sets the turtle's pen width.
PICTURE.FORMAT		Controls the file extension used for images if none was supplied.
PLACEHOLDER		Gets or sets the edit field's placeholder text.
POSITION		Sets or reports the widget's position.
PRECISION		Controls the number of decimals that Logo prints.
PRINT.BITMAPS		Controls the printing of bitmaps and turtles.
RTop Start
REARLEFT		Reports the status of InO-Bot's rear left obstacle sensor.
REARRIGHT		Reports the status of InO-Bot's rear right obstacle sensor.
RESOLUTION		Outputs a two-element list of the current camera resolution.
RUN		Contains a runlist to be executed when a control has been clicked or changed.
RUN		Stores a runlist that Logo executes when the widget is clicked.
STop Start
SCALE		Controls the widget's scaling.
SCREENSIZE		Reports the size of the browser window
SELECTED		Changes the input focus to the control.
SHADOW		Controls the widget's drop shadow.
SHAPE		Gets or sets the turtle's shape.
SHAPELOCK		Locks or unlocks a widget's rotation.
SIZE		Reports the size of the Graphics panel.
SIZE		Reports or sets the size of the widget's image size.
STACKSIZE		Controls the maximum number of nested procedure calls.
STARTANGLE		Contains the starting angle of a widget if dropped.
STATE		Gets or sets the Selected state of a check box.
STEPSIZE		Controls the number of pixels per step that the widget moves forward or back.
TTop Start
TAB		Controls the tab stop size used in the Listener's output field.
TEXT		Gets or sets the text of the control.
TEXTALIGN		Controls the alignment of the text within the control.
TITLE		Outputs the name of the currently attached camera.
TOOLTIP		Controls the contents of the widget's tool tip.
TOUCH		Reports touch data on touch screen equipped devices.
TURTLE.FONT		Controls the font used when creating a control.
UTop Start
USERNAME		Reports the user's name.
VTop Start
VALUE		Sets or gets the current value of a slider.
VELOCITY		Controls the speed at which a widget moves independently.
VERSION		Reports the Logo version number.
VISIBLE		Reports the panel's visibility
VISIBLE		Reports the panel's visibility
VISIBLE		Reports the panel's visibility
VISIBLE		Hides or shows the widget.
WTop Start
WINDOW		Reports the name of the Graphics panel that this widget is attached to.
WRAPMODE		Controls how a widget reacts when it hits the edge of the Graphics panel
WRAPMODE		Sets a widget's individual wrap mode.
ZTop Start
Z.ORDER		Controls the sequence of widgets when displayed.