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###
#
# ToolTips
#
namespace eval ::utils::tooltip {}
set ::utils::tooltip::showToolTips 1
set ::utils::tooltip::time 0
set ::utils::tooltip::enteredWidget {}
set ::utils::tooltip::tooltipDelay 400
set ::utils::tooltip::tooltipWidth 30
array set ::utils::tooltip::message {}
# Construct tooltip window:
#
toplevel .tooltip
label .tooltip.text -relief solid -borderwidth 1 -justify left \
-background lightYellow -padx 3 -pady 1
pack .tooltip.text -side left
wm overrideredirect .tooltip 1
if { $macOS } {
::tk::unsupported::MacWindowStyle style .tooltip help none
}
bind .tooltip <Button-1> { wm withdraw .tooltip }
wm withdraw .tooltip
# ::utils::tooltip::Set
#
# Set the tooltip message for <button> to be <msg>
#
proc ::utils::tooltip::Set { button msg } {
variable message
set msg [string trim $msg]
if {$msg == ""} { return }
regsub {\\n} $msg "\n" msg
set msg [::utils::tooltip::trimWidth $msg]
set message($button) $msg
bind $button <Any-Enter> +[list ::utils::tooltip::Enter $button]
bind $button <Any-Leave> +[list ::utils::tooltip::Leave $button]
}
# ::utils::tooltip::SetTag
#
# remove a tooltip message for a given button
#
proc ::utils::tooltip::UnSet { button } {
variable message
if { [info exists ::utils::tooltip::message($button)] } {
unset message($button)
bind $button <Any-Enter> ""
bind $button <Any-Leave> ""
}
}
# ::utils::tooltip::SetTag
#
# Set the tooltip message for a text with tag <tag> to be <msg>
#
proc ::utils::tooltip::SetTag { text_widget msg tag } {
variable message
set msg [string trim $msg]
if {$msg == ""} { return }
regsub {\\n} $msg "\n" msg
set msg [::utils::tooltip::trimWidth $msg]
set message(${tag}_$text_widget) $msg
$text_widget tag bind $tag <Any-Enter> +[list ::utils::tooltip::Enter ${tag}_$text_widget]
$text_widget tag bind $tag <Any-Leave> +[list ::utils::tooltip::Leave ${tag}_$text_widget]
}
# ::utils::tooltip::Enter
#
# Handles the mouse entering a button which has a tooltip.
#
proc ::utils::tooltip::Enter {button} {
variable showToolTips
variable enteredWidget
variable tooltipDelay
if {! $showToolTips} { return }
set enteredWidget $button
after $tooltipDelay [list ::utils::tooltip::Check $button]
}
# ::utils::tooltip::Check
#
# Called a set time after the mouse has entered a button with a
# tooltip, to check if it is still there. If so, the tooltip
# message is displayed.
#
proc ::utils::tooltip::Check {button} {
variable enteredWidget
if {$enteredWidget != $button} {
# The mouse cursor has moved somewhere else; display no tooltip
return
}
if {! [info exists ::utils::tooltip::message($button)]} { return }
.tooltip.text configure -text [tr $::utils::tooltip::message($button)]
set x [winfo pointerx .]
set y [winfo pointery .]
incr x 10
incr y 4
catch {wm transient .tooltip [winfo toplevel $button]}
# make the tooltip visible
set maxw [ winfo vrootwidth .]
set maxh [ winfo vrootheight .]
set w [winfo reqwidth .tooltip]
set h [winfo reqheight .tooltip]
if { [expr $x + $w] > $maxw } {
set x [expr $maxw - $w]
}
if { [expr $y + $h] > $maxh } {
set y [expr $maxh - $h]
}
catch {wm geometry .tooltip +$x+$y}
wm deiconify .tooltip
raise .tooltip
# Automatically erase tooltip after a short delay
after 15000 [ list ::utils::tooltip::Leave $button ]
}
# ::utils::tooltip::Leave
#
# Handles the mouse leaving a button which has a tooltip.
#
proc ::utils::tooltip::Leave {button} {
after cancel [ list ::utils::tooltip::Leave $button ]
variable showToolTips
if {! $showToolTips} { return }
wm withdraw .tooltip
after cancel [list ::utils::tooltip::Check $button]
}
# ::utils::tooltip::ToWidth
#
# Returns the arg with CR every tooltipWidth chars at most
#
proc ::utils::tooltip::trimWidth { msg } {
set ret ""
foreach line [split $msg "\n"] {
if {[string length $line] < $::utils::tooltip::tooltipWidth} {
append ret "$line\n"
continue
} else {
# must split the line
set words [split $line " "]
while {[llength $words] > 0} {
set tmp [lindex $words 0]
set words [lreplace $words 0 0]
while {[string length "$tmp [lindex $words 0]"] < $::utils::tooltip::tooltipWidth && [llength $words] > 0} {
append tmp " " [lindex $words 0]
set words [lreplace $words 0 0]
}
append ret $tmp "\n"
}
}
}
return [string trim $ret]
}
|
