Adds terminal resizing and a screen shot

README.md

@@ -4,6 +4,8 @@ This is a work in progress spreadsheet program with a semi-limited feature set.
 
 In general the use case for _tally_ is small spreadsheets, notes, shopping lists, bills, little bits of relational data. It is not meant to do what Excel, or Calc, or Lotus123 do. It is meant to be a small and simple alternative for small and simple use cases.
 
+![screen shot of tally showing monthly expenses vs income](tally.png)
+
 ## Building / Installing
 
 You will need a Go compiler. Testing on eary versions has not been done, but suffice to say you should likely not need the latest cutting edge Go version to compile _tally_.

workbook.go

@@ -6,6 +6,7 @@ import (
 	"path/filepath"
 	"strings"
 	"tildegit.org/sloum/tally/termios"
+	"time"
 )
 
 const (
@@ -43,6 +44,20 @@ type workbook struct {
 	termCols  int
 }
 
+func (w *workbook) PollForTermSize() {
+	for {
+		var cols, rows = termios.GetWindowSize()
+		if rows != w.termRows || cols != w.termCols {
+			w.termRows = rows
+			w.termCols = cols
+			fmt.Print("\033[2J")
+			w.Draw()
+		}
+
+		time.Sleep(500 * time.Millisecond)
+	}
+}
+
 func (w workbook) Draw() {
 	fmt.Print("\033[0;0H")
 	fmt.Printf("FILE: \033[1m%-*.*s\033[0m\n", w.termCols-6, w.termCols-6, w.path)
@@ -56,6 +71,9 @@ func (w *workbook) Run() {
 	defer termios.Restore()
 	termios.SetCharMode()
 	fmt.Print("\033[?25l\033[2J")
+
+	go w.PollForTermSize()
+
 	var input rune
 	for {
 		w.Draw()