Added callback for missing col value.

diff --git a/main.go b/main.go
index e4de04c9701fdbfa41e644104822c3224621bb8c..7de1eefe5c8ffd0de5e22335e3bcbe8d501d2e4d 100644 (file)
--- a/main.go
+++ b/main.go
@@ -7,10 +7,13 @@ import (
        _ "github.com/mattn/go-sqlite3"
 )
 
+type missingCol func (map[string]interface{}) interface{}
+
 type column struct {
        name string
        title string
        align int
+       toCall missingCol
 }
 
 type grid struct {
@@ -39,11 +42,12 @@ func (g *grid) getRowFromDb (m map[string]interface{}) string {
 
        for _, c := range g.cols {
                v, ok := m[c.name]
-               if ok {
-                       ret += fmt.Sprintf("\t<td>%v</td>\n", v)
-               } else {
-                       ret += fmt.Sprintf("\t<td></td>\n")
+               if !ok {
+                       if c.toCall != nil {
+                               v = c.toCall(m)
+                       }
                }
+               ret += fmt.Sprintf("\t<td>%v</td>\n", v)
        }
 
        ret += "</tr>\n"
@@ -51,6 +55,12 @@ func (g *grid) getRowFromDb (m map[string]interface{}) string {
        return ret
 }
 
+func missing (row map[string]interface{}) interface{} {
+       ret := "<button>Save</button>"
+
+       return ret
+}
+
 func main() {
        var g grid
 
@@ -67,6 +77,7 @@ func main() {
        g.addColumn(c)
 
        c = column{name: "btn", title: "Buttons"}
+       c.toCall = missing
        g.addColumn(c)
 
        fmt.Println (g)