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set lw [font measure $font $line]
if {$lw > $len} {
set len $lw
}
}
return $len
}
proc psballoon::createBalloon {W mx my} {
variable balloon
if {$balloon(created) == 0} {
# Figure out widget's font
if {[catch {set font [$W cget -font]}]} {
set font [ttk::style lookup [winfo class $W] -font]
}
# Fallback to something reasonable of font fails.
if {$font eq ""} {
set font TkDefaultFont
}
set ww [winfo width $W]
set ih [winfo height $W]
if {[winfo class $W] in {TLabelframe Labelframe}} {
# Put it below the label, not the entire widget.
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set lw [font measure $font $line]
if {$lw > $len} {
set len $lw
}
}
return $len
}
# Returns a list of minX maxX for each screen.
# maxX are exclusive and normally equal to the next minX
proc psballoon::FigureOutScreenWidths {W} {
set screens {}
# Range of X over multiple windows
set minX [winfo vrootx $W]
set maxX [expr {$minX + [winfo vrootwidth $W]}]
set sW [winfo screenwidth $W]
# Guess: If minX is negative, there is a screen from minX to 0
if {$minX < 0} {
lappend screens $minX 0
}
# Guess: Main screen is in the middle if three
# Main screen is 0 to screenWidth
lappend screens 0 $sW
# Guess: If maxX is larger than screen width (main screen), there
# is one more screen to the right
if {$maxX > $sW} {
lappend screens $sW $maxX
}
return $screens
}
proc psballoon::createBalloon {W mx my} {
variable balloon
if {![winfo exists $W]} {
return
}
if {$balloon(created) == 0} {
# Figure out widget's font
if {[catch {set font [$W cget -font]}]} {
set font [ttk::style lookup [winfo class $W] -font]
}
# Fallback to something reasonable if font fails.
if {$font eq ""} {
set font TkDefaultFont
}
set ww [winfo width $W]
set ih [winfo height $W]
if {[winfo class $W] in {TLabelframe Labelframe}} {
# Put it below the label, not the entire widget.
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set msg [subst -novariables -nobackslashes $msg]
}
set iw [Measure $font $msg]
}
if {$create} {
set x [expr {[winfo rootx $W] + $ix}]
set y [expr {[winfo rooty $W] + $iy + $ih + 2}]
if {$x + $iw + 8 > [winfo screenwidth $W]} {
set x [expr {[winfo screenwidth $W] - $iw - 8}]
}
toplevel .balloon -bg black
wm overrideredirect .balloon 1
label .balloon.l \
-text $msg -relief flat -font $font -justify left \
-bg #ffffaa -fg black -padx 2 -pady 0 -anchor "w"
pack .balloon.l -side left -padx 1 -pady 1
wm geometry .balloon +${x}+${y}
set balloon(created) 1
}
}
}
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set msg [subst -novariables -nobackslashes $msg]
}
set iw [Measure $font $msg]
}
if {$create} {
set x [expr {[winfo rootx $W] + $ix}]
set y [expr {[winfo rooty $W] + $iy + $ih + 2}]
# Limits of current screen.
foreach {minX maxX} [FigureOutScreenWidths $W] {
if {$minX <= $x && $x < $maxX} break
}
# Move it to the left as needed to fit on screen
if {$x + $iw + 8 > $maxX} {
set x [expr {$maxX - $iw - 8}]
}
# TBD, option to use a frame in parent instead?
toplevel .balloon -bg black
wm overrideredirect .balloon 1
label .balloon.l \
-text $msg -relief flat -font $font -justify left \
-bg #ffffaa -fg black -padx 2 -pady 0 -anchor "w"
pack .balloon.l -side left -padx 1 -pady 1
wm geometry .balloon +${x}+${y}
set balloon(created) 1
}
}
}
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