diff options
Diffstat (limited to 'doc/selection.n')
| -rw-r--r-- | doc/selection.n | 62 |
1 files changed, 36 insertions, 26 deletions
diff --git a/doc/selection.n b/doc/selection.n index 41d5d4b..e06a716 100644 --- a/doc/selection.n +++ b/doc/selection.n @@ -14,65 +14,66 @@ selection \- Manipulate the X selection .SH SYNOPSIS \fBselection \fIoption\fR ?\fIarg arg ...\fR? .BE - .SH DESCRIPTION .PP This command provides a Tcl interface to the X selection mechanism and implements the full selection functionality described in the X Inter-Client Communication Conventions Manual (ICCCM). .PP -Note that for management of the CLIPBOARD selection (see below), the +Note that for management of the \fBCLIPBOARD\fR selection (see below), the \fBclipboard\fR command may also be used. .PP The first argument to \fBselection\fR determines the format of the rest of the arguments and the behavior of the command. The following forms are currently supported: -.PP .TP \fBselection clear\fR ?\fB\-displayof\fR \fIwindow\fR? ?\fB\-selection\fR \fIselection\fR? +. If \fIselection\fR exists anywhere on \fIwindow\fR's display, clear it so that no window owns the selection anymore. \fISelection\fR specifies the X selection that should be cleared, and should be an -atom name such as PRIMARY or CLIPBOARD; see the Inter-Client +atom name such as \fBPRIMARY\fR or \fBCLIPBOARD\fR; see the Inter-Client Communication Conventions Manual for complete details. -\fISelection\fR defaults to PRIMARY and \fIwindow\fR defaults to +\fISelection\fR defaults to \fBPRIMARY\fR and \fIwindow\fR defaults to .QW . . Returns an empty string. .TP \fBselection get\fR ?\fB\-displayof\fR \fIwindow\fR? ?\fB\-selection\fR \fIselection\fR? ?\fB\-type\fR \fItype\fR? +. Retrieves the value of \fIselection\fR from \fIwindow\fR's display and -returns it as a result. \fISelection\fR defaults to PRIMARY and +returns it as a result. \fISelection\fR defaults to \fBPRIMARY\fR and \fIwindow\fR defaults to .QW . . \fIType\fR specifies the form in which the selection is to be returned (the desired .QW target for conversion, in ICCCM terminology), and -should be an atom name such as STRING or FILE_NAME; see the +should be an atom name such as \fBSTRING\fR or \fBFILE_NAME\fR; see the Inter-Client Communication Conventions Manual for complete details. -\fIType\fR defaults to STRING. The selection owner may choose to +\fIType\fR defaults to \fBSTRING\fR. The selection owner may choose to return the selection in any of several different representation -formats, such as STRING, UTF8_STRING, ATOM, INTEGER, etc. (this format -is different +formats, such as \fBSTRING\fR, \fBUTF8_STRING\fR, \fBATOM\fR, +\fBINTEGER\fR, etc. (this format is different than the selection type; see the ICCCM for all the confusing details). -If the selection is returned in a non-string format, such as INTEGER -or ATOM, the \fBselection\fR command converts it to string format as a +If the selection is returned in a non-string format, such as \fBINTEGER\fR +or \fBATOM\fR, the \fBselection\fR command converts it to string format as a collection of fields separated by spaces: atoms are converted to their textual names, and anything else is converted to hexadecimal integers. Note that \fBselection get\fR does not retrieve the selection in the -UTF8_STRING format unless told to. +\fBUTF8_STRING\fR format unless told to. .TP \fBselection handle\fR ?\fB\-selection\fR \fIs\fR? ?\fB\-type\fR \fIt\fR? ?\fB\-format\fR \fIf\fR? \fIwindow command\fR +. Creates a handler for selection requests, such that \fIcommand\fR will be executed whenever selection \fIs\fR is owned by \fIwindow\fR and someone attempts to retrieve it in the form given by type \fIt\fR (e.g. \fIt\fR is specified in the \fBselection get\fR command). -\fIS\fR defaults to PRIMARY, \fIt\fR defaults to STRING, and -\fIf\fR defaults to STRING. If \fIcommand\fR is an empty string +\fIS\fR defaults to \fBPRIMARY\fR, \fIt\fR defaults to \fBSTRING\fR, and +\fIf\fR defaults to \fBSTRING\fR. If \fIcommand\fR is an empty string then any existing handler for \fIwindow\fR, \fIt\fR, and \fIs\fR is removed. -Note that when the selection is handled as type STRING it is also -automatically handled as type UTF8_STRING as well. +Note that when the selection is handled as type \fBSTRING\fR it is also +automatically handled as type \fBUTF8_STRING\fR as well. .RS .PP When \fIselection\fR is requested, \fIwindow\fR is the selection owner, @@ -99,12 +100,12 @@ just as if the selection did not exist at all. .PP The \fIformat\fR argument specifies the representation that should be used to transmit the selection to the requester (the second column of -Table 2 of the ICCCM), and defaults to STRING. If \fIformat\fR is -STRING, the selection is transmitted as 8-bit ASCII characters (i.e. +Table 2 of the ICCCM), and defaults to \fBSTRING\fR. If \fIformat\fR is +\fBSTRING\fR, the selection is transmitted as 8-bit ASCII characters (i.e. just in the form returned by \fIcommand\fR, in the system \fBencoding\fR; -the UTF8_STRING format always uses UTF-8 as its encoding). +the \fBUTF8_STRING\fR format always uses UTF-8 as its encoding). If \fIformat\fR is -ATOM, then the return value from \fIcommand\fR is divided into fields +\fBATOM\fR, then the return value from \fIcommand\fR is divided into fields separated by white space; each field is converted to its atom value, and the 32-bit atom value is transmitted instead of the atom name. For any other \fIformat\fR, the return value from \fIcommand\fR is @@ -122,12 +123,14 @@ irrelevant. \fBselection own\fR ?\fB\-displayof\fR \fIwindow\fR? ?\fB\-selection\fR \fIselection\fR? .TP \fBselection own\fR ?\fB\-command\fR \fIcommand\fR? ?\fB\-selection\fR \fIselection\fR? \fIwindow\fR +. The first form of \fBselection own\fR returns the path name of the window in this application that owns \fIselection\fR on the display containing \fIwindow\fR, or an empty string if no window in this -application owns the selection. \fISelection\fR defaults to PRIMARY and +application owns the selection. \fISelection\fR defaults to \fBPRIMARY\fR and \fIwindow\fR defaults to .QW . . +.RS .PP The second form of \fBselection own\fR causes \fIwindow\fR to become the new owner of \fIselection\fR on \fIwindow\fR's display, returning @@ -136,16 +139,20 @@ that it has lost the selection. If \fIcommand\fR is specified, it is a Tcl script to execute when some other window claims ownership of the selection away from \fIwindow\fR. \fISelection\fR defaults to PRIMARY. +.RE .SH EXAMPLES +.PP On X11 platforms, one of the standard selections available is the -SECONDARY selection. Hardly anything uses it, but here is how to read +\fBSECONDARY\fR selection. Hardly anything uses it, but here is how to read it using Tk: +.PP .CS set selContents [\fBselection get\fR \-selection SECONDARY] .CE .PP Many different types of data may be available for a selection; the -special type TARGETS allows you to get a list of available types: +special type \fBTARGETS\fR allows you to get a list of available types: +.PP .CS foreach type [\fBselection get\fR \-type TARGETS] { puts "Selection PRIMARY supports type $type" @@ -153,14 +160,14 @@ foreach type [\fBselection get\fR \-type TARGETS] { .CE .PP To claim the selection, you must first set up a handler to supply the -data for the selection. Then you have to claim the selection... +data for the selection. Then you have to claim the selection... .CS # Set up the data handler ready for incoming requests set foo "This is a string with some data in it... blah blah" \fBselection handle\fR \-selection SECONDARY . getData proc getData {offset maxChars} { puts "Retrieving selection starting at $offset" - return [string range $::foo $offset [expr {$offset+$maxChars}]] + return [string range $::foo $offset [expr {$offset+$maxChars-1}]] } # Now we grab the selection itself @@ -174,3 +181,6 @@ proc lost {} { clipboard(n) .SH KEYWORDS clear, format, handler, ICCCM, own, selection, target, type +'\" Local Variables: +'\" mode: nroff +'\" End: |