Initial class construction

Git/mingw64/share/git-gui/lib/line.tcl

@@ -0,0 +1,81 @@
+# goto line number
+# based on code from gitk, Copyright (C) Paul Mackerras
+
+class linebar {
+
+field w
+field ctext
+
+field linenum   {}
+
+constructor new {i_w i_text args} {
+	global use_ttk NS
+	set w      $i_w
+	set ctext  $i_text
+
+	${NS}::frame  $w
+	${NS}::label  $w.l       -text [mc "Goto Line:"]
+	tentry  $w.ent \
+		-textvariable ${__this}::linenum \
+		-background lightgreen \
+		-validate key \
+		-validatecommand [cb _validate %P]
+	${NS}::button $w.bn      -text [mc Go] -command [cb _goto]
+
+	pack   $w.l   -side left
+	pack   $w.bn  -side right
+	pack   $w.ent -side left -expand 1 -fill x
+
+	eval grid conf $w -sticky we $args
+	grid remove $w
+
+	trace add variable linenum write [cb _goto_cb]
+	bind $w.ent <Return> [cb _goto]
+	bind $w.ent <Escape> [cb hide]
+
+	bind $w <Destroy> [list delete_this $this]
+	return $this
+}
+
+method show {} {
+	if {![visible $this]} {
+		grid $w
+	}
+	focus -force $w.ent
+}
+
+method hide {} {
+	if {[visible $this]} {
+		$w.ent delete 0 end
+		focus $ctext
+		grid remove $w
+	}
+}
+
+method visible {} {
+	return [winfo ismapped $w]
+}
+
+method editor {} {
+	return $w.ent
+}
+
+method _validate {P} {
+	# only accept numbers as input
+	string is integer $P
+}
+
+method _goto_cb {name ix op} {
+	after idle [cb _goto 1]
+}
+
+method _goto {{nohide {0}}} {
+	if {$linenum ne {}} {
+		$ctext see $linenum.0
+		if {!$nohide} {
+			hide $this
+		}
+	}
+}
+
+}