1ttk::scrollbar(n) Tk Themed Widget ttk::scrollbar(n)
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8 ttk::scrollbar - Control the viewport of a scrollable widget
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11 ttk::scrollbar pathName ?options...?
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15 ttk::scrollbar widgets are typically linked to an associated window
16 that displays a document of some sort, such as a file being edited or a
17 drawing. A scrollbar displays a thumb in the middle portion of the
18 scrollbar, whose position and size provides information about the por‐
19 tion of the document visible in the associated window. The thumb may
20 be dragged by the user to control the visible region. Depending on the
21 theme, two or more arrow buttons may also be present; these are used to
22 scroll the visible region in discrete units.
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25 -class -cursor -style
26 -takefocus
27 See the ttk_widget manual entry for details on the standard options.
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31 Command-Line Name:-command
32 Database Name: command
33 Database Class: Command
34 A Tcl script prefix to evaluate to change the view in the widget
36 associated with the scrollbar. Additional arguments are
37 appended to the value of this option, as described in SCROLLING
38 COMMANDS below, whenever the user requests a view change by
39 manipulating the scrollbar.
40 This option typically consists of a two-element list, containing
42 the name of a scrollable widget followed by either xview (for
43 horizontal scrollbars) or yview (for vertical scrollbars).
44 Command-Line Name:-orient
46 Database Name: orient
47 Database Class: Orient
48 One of horizontal or vertical. Specifies the orientation of the
50 scrollbar.
51
53 pathName cget option
54 Returns the current value of the specified option; see ttk::wid‐
55 get(n).
56 pathName configure ?option? ?value option value ...?
58 Modify or query widget options; see ttk::widget(n).
59 pathName get
61 Returns the scrollbar settings in the form of a list whose ele‐
62 ments are the arguments to the most recent set widget command.
63 pathName identify x y
65 Returns the name of the element at position x, y. See ttk::wid‐
66 get(n).
67 pathName instate statespec ?script?
69 Test the widget state; see ttk::widget(n).
70 pathName set first last
72 This command is normally invoked by the scrollbar's associated
73 widget from an -xscrollcommand or -yscrollcommand callback.
74 Specifies the visible range to be displayed. first and last are
75 real fractions between 0 and 1.
76 pathName state ?stateSpec?
78 Modify or query the widget state; see ttk::widget(n).
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81 The following widget commands are used internally by the TScrollbar
82 widget class bindings.
83 pathName delta deltaX deltaY
85 Returns a real number indicating the fractional change in the
86 scrollbar setting that corresponds to a given change in thumb
87 position. For example, if the scrollbar is horizontal, the
88 result indicates how much the scrollbar setting must change to
89 move the thumb deltaX pixels to the right (deltaY is ignored in
90 this case). If the scrollbar is vertical, the result indicates
91 how much the scrollbar setting must change to move the thumb
92 deltaY pixels down. The arguments and the result may be zero or
93 negative.
94 pathName fraction x y
96 Returns a real number between 0 and 1 indicating where the point
97 given by x and y lies in the trough area of the scrollbar, where
98 0.0 corresponds to the top or left of the trough and 1.0 corre‐
99 sponds to the bottom or right. X and y are pixel coordinates
100 relative to the scrollbar widget. If x and y refer to a point
101 outside the trough, the closest point in the trough is used.
102
104 When the user interacts with the scrollbar, for example by dragging the
105 thumb, the scrollbar notifies the associated widget that it must change
106 its view. The scrollbar makes the notification by evaluating a Tcl
107 command generated from the scrollbar's -command option. The command
108 may take any of the following forms. In each case, prefix is the con‐
109 tents of the -command option, which usually has a form like .t yview
110 prefix moveto fraction
112 Fraction is a real number between 0 and 1. The widget should
113 adjust its view so that the point given by fraction appears at
114 the beginning of the widget. If fraction is 0 it refers to the
115 beginning of the document. 1.0 refers to the end of the docu‐
116 ment, 0.333 refers to a point one-third of the way through the
117 document, and so on.
118 prefix scroll number units
120 The widget should adjust its view by number units. The units
121 are defined in whatever way makes sense for the widget, such as
122 characters or lines in a text widget. Number is either 1, which
123 means one unit should scroll off the top or left of the window,
124 or -1, which means that one unit should scroll off the bottom or
125 right of the window.
126 prefix scroll number pages
128 The widget should adjust its view by number pages. It is up to
129 the widget to define the meaning of a page; typically it is
130 slightly less than what fits in the window, so that there is a
131 slight overlap between the old and new views. Number is either
132 1, which means the next page should become visible, or -1, which
133 means that the previous page should become visible.
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136 The scrollbar automatically sets the disabled state bit. when the
137 entire range is visible (range is 0.0 to 1.0), and clears it otherwise.
138 It also sets the active and pressed state flags of individual elements,
139 based on the position and state of the mouse pointer.
140
142 set f [frame .f]
143 ttk::scrollbar $f.hsb -orient horizontal -command [list $f.t xview]
144 ttk::scrollbar $f.vsb -orient vertical -command [list $f.t yview]
145 text $f.t -xscrollcommand [list $f.hsb set] -yscrollcommand [list $f.vsb set]
146 grid $f.t -row 0 -column 0 -sticky nsew
147 grid $f.vsb -row 0 -column 1 -sticky nsew
148 grid $f.hsb -row 1 -column 0 -sticky nsew
149 grid columnconfigure $f 0 -weight 1
150 grid rowconfigure $f 0 -weight 1
151
153 ttk::widget(n), scrollbar(n)
154
156 scrollbar, widget
157Tk 8.5 ttk::scrollbar(n)