diff options
Diffstat (limited to 'doc/listbox.n')
| -rw-r--r-- | doc/listbox.n | 57 |
1 files changed, 48 insertions, 9 deletions
diff --git a/doc/listbox.n b/doc/listbox.n index 8150cba..709b702 100644 --- a/doc/listbox.n +++ b/doc/listbox.n @@ -75,7 +75,7 @@ When first created, a new listbox has no elements. Elements may be added or deleted using widget commands described below. In addition, one or more elements may be selected as described below. -If a listbox is exporting its selection (see \fBexportSelection\fR +If a listbox is exporting its selection (see \fB\-exportselection\fR option), then it will observe the standard X11 protocols for handling the selection. Listbox selections are available as type \fBSTRING\fR; @@ -85,8 +85,8 @@ newlines separating the elements. It is not necessary for all the elements to be displayed in the listbox window at once; commands described below may be used to change the view in the window. Listboxes allow -scrolling in both directions using the standard \fBxScrollCommand\fR -and \fByScrollCommand\fR options. +scrolling in both directions using the standard \fB\-xscrollcommand\fR +and \fB\-yscrollcommand\fR options. They also support scanning, as described below. .SH "INDICES" .PP @@ -96,20 +96,24 @@ An index specifies a particular element of the listbox, in any of the following ways: .TP 12 \fInumber\fR +. Specifies the element as a numerical index, where 0 corresponds to the first element in the listbox. .TP 12 \fBactive\fR +. Indicates the element that has the location cursor. This element will be displayed as specified by \fB\-activestyle\fR when the listbox has the keyboard focus, and it is specified with the \fBactivate\fR widget command. .TP 12 \fBanchor\fR +. Indicates the anchor point for the selection, which is set with the \fBselection anchor\fR widget command. .TP 12 \fBend\fR +. Indicates the end of the listbox. For most commands this refers to the last element in the listbox, but for a few commands such as \fBindex\fR and \fBinsert\fR @@ -138,6 +142,7 @@ determine the exact behavior of the command. The following commands are possible for listbox widgets: .TP \fIpathName \fBactivate\fR \fIindex\fR +. Sets the active element to the one indicated by \fIindex\fR. If \fIindex\fR is outside the range of elements in the listbox then the closest element is activated. @@ -146,6 +151,7 @@ widget has the input focus, and its index may be retrieved with the index \fBactive\fR. .TP \fIpathName \fBbbox\fR \fIindex\fR +. Returns a list of four numbers describing the bounding box of the text in the element given by \fIindex\fR. The first two elements of the list give the x and y coordinates @@ -160,12 +166,14 @@ partially visible, the result gives the full area of the element, including any parts that are not visible. .TP \fIpathName \fBcget\fR \fIoption\fR +. Returns the current value of the configuration option given by \fIoption\fR. \fIOption\fR may have any of the values accepted by the \fBlistbox\fR command. .TP \fIpathName \fBconfigure\fR ?\fIoption\fR? ?\fIvalue option value ...\fR? +. Query or modify the configuration options of the widget. If no \fIoption\fR is specified, returns a list describing all of the available options for \fIpathName\fR (see \fBTk_ConfigureInfo\fR for @@ -180,18 +188,21 @@ this case the command returns an empty string. command. .TP \fIpathName \fBcurselection\fR +. Returns a list containing the numerical indices of all of the elements in the listbox that are currently selected. If there are no elements selected in the listbox then an empty string is returned. .TP \fIpathName \fBdelete \fIfirst \fR?\fIlast\fR? +. Deletes one or more elements of the listbox. \fIFirst\fR and \fIlast\fR are indices specifying the first and last elements in the range to delete. If \fIlast\fR is not specified it defaults to \fIfirst\fR, i.e. a single element is deleted. .TP \fIpathName \fBget \fIfirst\fR ?\fIlast\fR? +. If \fIlast\fR is omitted, returns the contents of the listbox element indicated by \fIfirst\fR, or an empty string if \fIfirst\fR refers to a non-existent element. @@ -202,22 +213,26 @@ Both \fIfirst\fR and \fIlast\fR may have any of the standard forms for indices. .TP \fIpathName \fBindex \fIindex\fR +. Returns the integer index value that corresponds to \fIindex\fR. If \fIindex\fR is \fBend\fR the return value is a count of the number of elements in the listbox (not the index of the last element). .TP \fIpathName \fBinsert \fIindex \fR?\fIelement element ...\fR? +. Inserts zero or more new elements in the list just before the element given by \fIindex\fR. If \fIindex\fR is specified as \fBend\fR then the new elements are added to the end of the list. Returns an empty string. .TP \fIpathName \fBitemcget \fIindex option\fR +. Returns the current value of the item configuration option given by \fIoption\fR. \fIOption\fR may have any of the values accepted -by the \fBlistbox itemconfigure\fR command. +by the \fBitemconfigure\fR command. .TP \fIpathName \fBitemconfigure \fIindex\fR ?\fIoption\fR? ?\fIvalue\fR? ?\fIoption value ...\fR? +. Query or modify the configuration options of an item in the listbox. If no \fIoption\fR is specified, returns a list describing all of the available options for the item (see \fBTk_ConfigureInfo\fR for @@ -232,40 +247,48 @@ are currently supported for items: .RS .TP \fB\-background \fIcolor\fR +. \fIColor\fR specifies the background color to use when displaying the item. It may have any of the forms accepted by \fBTk_GetColor\fR. .TP \fB\-foreground \fIcolor\fR +. \fIColor\fR specifies the foreground color to use when displaying the item. It may have any of the forms accepted by \fBTk_GetColor\fR. .TP \fB\-selectbackground \fIcolor\fR +. \fIcolor\fR specifies the background color to use when displaying the item while it is selected. It may have any of the forms accepted by \fBTk_GetColor\fR. .TP \fB\-selectforeground \fIcolor\fR +. \fIcolor\fR specifies the foreground color to use when displaying the item while it is selected. It may have any of the forms accepted by \fBTk_GetColor\fR. .RE .TP \fIpathName \fBnearest \fIy\fR +. Given a y-coordinate within the listbox window, this command returns the index of the (visible) listbox element nearest to that y-coordinate. .TP \fIpathName \fBscan\fR \fIoption args\fR +. This command is used to implement scanning on listboxes. It has two forms, depending on \fIoption\fR: .RS .TP \fIpathName \fBscan mark \fIx y\fR +. Records \fIx\fR and \fIy\fR and the current view in the listbox window; used in conjunction with later \fBscan dragto\fR commands. Typically this command is associated with a mouse button press in the widget. It returns an empty string. .TP \fIpathName \fBscan dragto \fIx y\fR. +. This command computes the difference between its \fIx\fR and \fIy\fR arguments and the \fIx\fR and \fIy\fR arguments to the last \fBscan mark\fR command for the widget. @@ -277,6 +300,7 @@ value is an empty string. .RE .TP \fIpathName \fBsee \fIindex\fR +. Adjust the view in the listbox so that the element given by \fIindex\fR is visible. If the element is already visible then the command has no effect; @@ -285,11 +309,13 @@ scrolls to bring the element into view at the edge; otherwise the listbox scrolls to center the element. .TP \fIpathName \fBselection \fIoption arg\fR +. This command is used to adjust the selection within a listbox. It has several forms, depending on \fIoption\fR: .RS .TP \fIpathName \fBselection anchor \fIindex\fR +. Sets the selection anchor to the element given by \fIindex\fR. If \fIindex\fR refers to a non-existent element, then the closest element is used. @@ -299,32 +325,38 @@ The index \fBanchor\fR may be used to refer to the anchor element. .TP \fIpathName \fBselection clear \fIfirst \fR?\fIlast\fR? +. If any of the elements between \fIfirst\fR and \fIlast\fR (inclusive) are selected, they are deselected. The selection state is not changed for elements outside this range. .TP \fIpathName \fBselection includes \fIindex\fR +. Returns 1 if the element indicated by \fIindex\fR is currently selected, 0 if it is not. .TP \fIpathName \fBselection set \fIfirst \fR?\fIlast\fR? +. Selects all of the elements in the range between \fIfirst\fR and \fIlast\fR, inclusive, without affecting the selection state of elements outside that range. .RE .TP \fIpathName \fBsize\fR +. Returns a decimal string indicating the total number of elements in the listbox. .TP -\fIpathName \fBxview \fIargs\fR +\fIpathName \fBxview \fR?\fIargs\fR +. This command is used to query and change the horizontal position of the information in the widget's window. It can take any of the following forms: .RS .TP \fIpathName \fBxview\fR +. Returns a list containing two elements. Each element is a real fraction between 0 and 1; together they describe the horizontal span that is visible in the window. @@ -334,17 +366,20 @@ in the window, and 40% of the text is off-screen to the right. These are the same values passed to scrollbars via the \fB\-xscrollcommand\fR option. .TP -\fIpathName \fBxview\fR \fIindex\fR +\fIpathName \fBxview \fIindex\fR +. Adjusts the view in the window so that the character position given by \fIindex\fR is displayed at the left edge of the window. Character positions are defined by the width of the character \fB0\fR. .TP \fIpathName \fBxview moveto\fI fraction\fR +. Adjusts the view in the window so that \fIfraction\fR of the total width of the listbox text is off-screen to the left. \fIfraction\fR must be a fraction between 0 and 1. .TP \fIpathName \fBxview scroll \fInumber what\fR +. This command shifts the view in the window left or right according to \fInumber\fR and \fIwhat\fR. \fINumber\fR must be an integer. @@ -359,7 +394,8 @@ become visible; if it is positive then characters farther to the right become visible. .RE .TP -\fIpathName \fByview \fI?args\fR? +\fIpathName \fByview \fR?\fIargs\fR? +. This command is used to query and change the vertical position of the text in the widget's window. It can take any of the following forms: @@ -376,11 +412,13 @@ the last one in the window, relative to the listbox as a whole. These are the same values passed to scrollbars via the \fB\-yscrollcommand\fR option. .TP -\fIpathName \fByview\fR \fIindex\fR +\fIpathName \fByview \fIindex\fR +. Adjusts the view in the window so that the element given by \fIindex\fR is displayed at the top of the window. .TP \fIpathName \fByview moveto\fI fraction\fR +. Adjusts the view in the window so that the element given by \fIfraction\fR appears at the top of the window. \fIFraction\fR is a fraction between 0 and 1; 0 indicates the first @@ -388,6 +426,7 @@ element in the listbox, 0.33 indicates the element one-third the way through the listbox, and so on. .TP \fIpathName \fByview scroll \fInumber what\fR +. This command adjusts the view in the window up or down according to \fInumber\fR and \fIwhat\fR. \fINumber\fR must be an integer. @@ -403,7 +442,7 @@ become visible. .PP Tk automatically creates class bindings for listboxes that give them Motif-like behavior. Much of the behavior of a listbox is determined -by its \fBselectMode\fR option, which selects one of four ways +by its \fB\-selectmode\fR option, which selects one of four ways of dealing with the selection. .PP If the selection mode is \fBsingle\fR or \fBbrowse\fR, at most one |