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diff --git a/tk8.6/doc/ttk_scrollbar.n b/tk8.6/doc/ttk_scrollbar.n new file mode 100644 index 0000000..03d09f2 --- /dev/null +++ b/tk8.6/doc/ttk_scrollbar.n @@ -0,0 +1,163 @@ +'\" +'\" Copyright (c) 1994-1996 Sun Microsystems, Inc. +'\" Copyright (c) 2004 Joe English +'\" +'\" See the file "license.terms" for information on usage and redistribution +'\" of this file, and for a DISCLAIMER OF ALL WARRANTIES. +'\" +.TH ttk::scrollbar n 8.5 Tk "Tk Themed Widget" +.so man.macros +.BS +.SH NAME +ttk::scrollbar \- Control the viewport of a scrollable widget +.SH SYNOPSIS +\fBttk::scrollbar\fR \fIpathName \fR?\fIoptions...\fR? +.BE +.SH DESCRIPTION +.PP +\fBttk::scrollbar\fR widgets are typically linked to an associated window +that displays a document of some sort, such as a file being edited or a +drawing. +A scrollbar displays a \fIthumb\fR in the middle portion of the scrollbar, +whose position and size provides information about the portion of the +document visible in the associated window. +The thumb may be dragged by the user to control the visible region. +Depending on the theme, two or more arrow buttons may also be present; +these are used to scroll the visible region in discrete units. +.SO ttk_widget +\-class \-cursor \-style +\-takefocus +.SE +.SH "WIDGET-SPECIFIC OPTIONS" +.OP \-command command Command +A Tcl script prefix to evaluate +to change the view in the widget associated with the scrollbar. +Additional arguments are appended to the value of this option, +as described in \fBSCROLLING COMMANDS\fR below, +whenever the user requests a view change by manipulating the scrollbar. +.RS +.PP +This option typically consists of a two-element list, +containing the name of a scrollable widget followed by +either \fBxview\fR (for horizontal scrollbars) +or \fByview\fR (for vertical scrollbars). +.RE +.OP \-orient orient Orient +One of \fBhorizontal\fR or \fBvertical\fR. +Specifies the orientation of the scrollbar. +.SH "WIDGET COMMAND" +.PP +.TP +\fIpathName \fBcget \fIoption\fR +Returns the current value of the specified \fIoption\fR; see \fIttk::widget(n)\fR. +.TP +\fIpathName \fBconfigure\fR ?\fIoption\fR? ?\fIvalue option value ...\fR? +Modify or query widget options; see \fIttk::widget(n)\fR. +.TP +\fIpathName \fBget\fR +Returns the scrollbar settings in the form of a list whose +elements are the arguments to the most recent \fBset\fR widget command. +.TP +\fIpathName \fBidentify \fIx y\fR +Returns the name of the element at position \fIx\fR, \fIy\fR. +See \fIttk::widget(n)\fR. +.TP +\fIpathName \fBinstate \fIstatespec\fR ?\fIscript\fR? +Test the widget state; see \fIttk::widget(n)\fR. +.TP +\fIpathName \fBset \fIfirst last\fR +This command is normally invoked by the scrollbar's associated widget +from an \fB\-xscrollcommand\fR or \fB\-yscrollcommand\fR callback. +Specifies the visible range to be displayed. +\fIfirst\fR and \fIlast\fR are real fractions between 0 and 1. +.TP +\fIpathName \fBstate\fR ?\fIstateSpec\fR? +Modify or query the widget state; see \fIttk::widget(n)\fR. +.SH "INTERNAL COMMANDS" +.PP +The following widget commands are used internally +by the TScrollbar widget class bindings. +.TP +\fIpathName \fBdelta \fIdeltaX deltaY\fR +Returns a real number indicating the fractional change in +the scrollbar setting that corresponds to a given change +in thumb position. For example, if the scrollbar is horizontal, +the result indicates how much the scrollbar setting must change +to move the thumb \fIdeltaX\fR pixels to the right (\fIdeltaY\fR is +ignored in this case). +If the scrollbar is vertical, the result indicates how much the +scrollbar setting must change to move the thumb \fIdeltaY\fR pixels +down. The arguments and the result may be zero or negative. +.TP +\fIpathName \fBfraction \fIx y\fR +Returns a real number between 0 and 1 indicating where the point +given by \fIx\fR and \fIy\fR lies in the trough area of the scrollbar, +where 0.0 corresponds to the top or left of the trough +and 1.0 corresponds to the bottom or right. +\fIX\fR and \fIy\fR are pixel coordinates relative to the scrollbar +widget. +If \fIx\fR and \fIy\fR refer to a point outside the trough, the closest +point in the trough is used. +.SH "SCROLLING COMMANDS" +.PP +When the user interacts with the scrollbar, for example by dragging +the thumb, the scrollbar notifies the associated widget that it +must change its view. +The scrollbar makes the notification by evaluating a Tcl command +generated from the scrollbar's \fB\-command\fR option. +The command may take any of the following forms. +In each case, \fIprefix\fR is the contents of the +\fB\-command\fR option, which usually has a form like \fB.t yview\fR +.TP +\fIprefix \fBmoveto \fIfraction\fR +\fIFraction\fR is a real number between 0 and 1. +The widget should adjust its view so that the point given +by \fIfraction\fR appears at the beginning of the widget. +If \fIfraction\fR is 0 it refers to the beginning of the +document. 1.0 refers to the end of the document, 0.333 +refers to a point one-third of the way through the document, +and so on. +.TP +\fIprefix \fBscroll \fInumber \fBunits\fR +The widget should adjust its view by \fInumber\fR units. +The units are defined in whatever way makes sense for the widget, +such as characters or lines in a text widget. +\fINumber\fR is either 1, which means one unit should scroll off +the top or left of the window, or \-1, which means that one unit +should scroll off the bottom or right of the window. +.TP +\fIprefix \fBscroll \fInumber \fBpages\fR +The widget should adjust its view by \fInumber\fR pages. +It is up to the widget to define the meaning of a page; typically +it is slightly less than what fits in the window, so that there +is a slight overlap between the old and new views. +\fINumber\fR is either 1, which means the next page should +become visible, or \-1, which means that the previous page should +become visible. +.SH "WIDGET STATES" +.PP +The scrollbar automatically sets the \fBdisabled\fR state bit. +when the entire range is visible (range is 0.0 to 1.0), +and clears it otherwise. +It also sets the \fBactive\fR and \fBpressed\fR state flags +of individual elements, based on the position and state of the mouse pointer. +.SH EXAMPLE +.PP +.CS +set f [frame .f] +ttk::scrollbar $f.hsb \-orient horizontal \-command [list $f.t xview] +ttk::scrollbar $f.vsb \-orient vertical \-command [list $f.t yview] +text $f.t \-xscrollcommand [list $f.hsb set] \-yscrollcommand [list $f.vsb set] +grid $f.t \-row 0 \-column 0 \-sticky nsew +grid $f.vsb \-row 0 \-column 1 \-sticky nsew +grid $f.hsb \-row 1 \-column 0 \-sticky nsew +grid columnconfigure $f 0 \-weight 1 +grid rowconfigure $f 0 \-weight 1 +.CE +.SH "SEE ALSO" +ttk::widget(n), scrollbar(n) +.SH KEYWORDS +scrollbar, widget +'\" Local Variables: +'\" mode: nroff +'\" End: |