Arc Items

Preface
Introduction
Tutorial
Implementation
Commands
- bitmap
- eval-wish
- get-tk-var
- photo
- set-tk-var!
- tk
  - create-widget
    - button
    - canvas
      - Introduction
      - Items
        
        Options
        
        Arc
        
        Bitmap
        
        Image
        
        Line
        
        Oval
        
        Polygon
        
        Rectangle
        
        Text
        
        Window
      - Command
      - Options
    - checkbutton
    - entry
    - frame
    - label
    - labelframe
    - listbox
    - menu
    - menubutton
    - message
    - panedwindow
    - radiobutton
    - scale
    - scrollbar
    - scrolledtext
    - spinbox
    - text
    - tk_optionMenu
    - toplevel
  - get-id
  - exec
  - call
- tk-id->widget
- tk-var
- tk/after
- tk/appname
- tk/bind
- tk/bindtags
- tk/caret
- tk/choosecolor
- tk/choosedirectory
- tk/clipboard
- tk/console
- tk/destroy
- tk/dialog
- tk/event
- tk/focus
- tk/getopenfile
- tk/getsavefile
- tk/grab
- tk/grid
- tk/image
- tk/lower
- tk/messagebox
- tk/option
- tk/pack
- tk/place
- tk/popup
- tk/raise
- tk/scaling
- tk/update
- tk/useinputmethods
- tk/wait
- tk/windowingsystem
- tk/winfo
- tk/wm
Options
Extensions
Changes

Items of type arc appear on the display as arc-shaped regions. An arc is a section of an oval delimited by two angles (specified by the #:start and #:extent options) and displayed in one of several ways (specified by the #:style option). Arcs are created with widget commands of the following form:

(#<widget> 'create 'arc x1 y1 x2 y2 ?option value option value ...?)
(#<widget> 'create 'arc coordList ?option value option value ...?)

The arguments x1, y1, x2, and y2 or coordList give the coordinates of two diagonally opposite corners of a rectangular region enclosing the oval that defines the arc. After the coordinates there may be any number of option-value pairs, each of which sets one of the configuration options for the item. These same option-value pairs may be used in itemconfigure widget commands to change the item's configuration.

The following standard options are supported by arcs:

#:dash
#:activedash
#:disableddash
#:dashoffset
#:fill
#:activefill
#:disabledfill
#:offset
#:outline
#:activeoutline
#:disabledoutline
#:outlinestipple
#:activeoutlinestipple
#:disabledoutlinestipple
#:stipple
#:activestipple
#:disabledstipple
#:state
#:tags
#:width
#:activewidth
#:disabledwidth

The following extra options are supported for arcs:

#:extent degrees: Specifies the size of the angular range occupied by the arc. The arc's range extends for degrees degrees counter-clockwise from the starting angle given by the #:start option. Degrees may be negative. If it is greater than 360 or less than -360, then degrees modulo 360 is used as the extent.
#:start degrees: Specifies the beginning of the angular range occupied by the arc. Degrees is given in units of degrees measured counter-clockwise from the 3-o'clock position; it may be either positive or negative.
#:style type: Specifies how to draw the arc. If type is pieslice (the default) then the arc's region is defined by a section of the oval's perimeter plus two line segments, one between the center of the oval and each end of the perimeter section. If type is chord then the arc's region is defined by a section of the oval's perimeter plus a single line segment connecting the two end points of the perimeter section. If type is arc then the arc's region consists of a section of the perimeter alone. In this last case the #:fill option is ignored.


		Arc Items
		Arc Items

	Preface Introduction Tutorial Implementation Commands bitmap eval-wish get-tk-var photo set-tk-var! tk create-widget button canvas Introduction Items Options Arc Bitmap Image Line Oval Polygon Rectangle Text Window Command Options checkbutton entry frame label labelframe listbox menu menubutton message panedwindow radiobutton scale scrollbar scrolledtext spinbox text tk_optionMenu toplevel get-id exec call tk-id->widget tk-var tk/after tk/appname tk/bind tk/bindtags tk/caret tk/choosecolor tk/choosedirectory tk/clipboard tk/console tk/destroy tk/dialog tk/event tk/focus tk/getopenfile tk/getsavefile tk/grab tk/grid tk/image tk/lower tk/messagebox tk/option tk/pack tk/place tk/popup tk/raise tk/scaling tk/update tk/useinputmethods tk/wait tk/windowingsystem tk/winfo tk/wm Options Extensions Changes	Items of type arc appear on the display as arc-shaped regions. An arc is a section of an oval delimited by two angles (specified by the #:start and #:extent options) and displayed in one of several ways (specified by the #:style option). Arcs are created with widget commands of the following form: (#<widget> 'create 'arc x1 y1 x2 y2 ?option value option value ...?) (#<widget> 'create 'arc coordList ?option value option value ...?) The arguments x1, y1, x2, and y2 or coordList give the coordinates of two diagonally opposite corners of a rectangular region enclosing the oval that defines the arc. After the coordinates there may be any number of option-value pairs, each of which sets one of the configuration options for the item. These same option-value pairs may be used in itemconfigure widget commands to change the item's configuration. The following standard options are supported by arcs: #:dash #:activedash #:disableddash #:dashoffset #:fill #:activefill #:disabledfill #:offset #:outline #:activeoutline #:disabledoutline #:outlinestipple #:activeoutlinestipple #:disabledoutlinestipple #:stipple #:activestipple #:disabledstipple #:state #:tags #:width #:activewidth #:disabledwidth The following extra options are supported for arcs: #:extent degrees Specifies the size of the angular range occupied by the arc. The arc's range extends for degrees degrees counter-clockwise from the starting angle given by the #:start option. Degrees may be negative. If it is greater than 360 or less than -360, then degrees modulo 360 is used as the extent. #:start degrees Specifies the beginning of the angular range occupied by the arc. Degrees is given in units of degrees measured counter-clockwise from the 3-o'clock position; it may be either positive or negative. #:style type Specifies how to draw the arc. If type is pieslice (the default) then the arc's region is defined by a section of the oval's perimeter plus two line segments, one between the center of the oval and each end of the perimeter section. If type is chord then the arc's region is defined by a section of the oval's perimeter plus a single line segment connecting the two end points of the perimeter section. If type is arc then the arc's region consists of a section of the perimeter alone. In this last case the #:fill option is ignored. © Author \| Home \| Sitemap