sqlite: load column headers

bolt.go

@@ -9,6 +9,7 @@ import (
 	"unsafe"
 
 	"github.com/ying32/govcl/vcl"
+	"github.com/ying32/govcl/vcl/types"
 	"go.etcd.io/bbolt"
 )
 
@@ -46,6 +47,16 @@ func (ld *boltLoadedDatabase) RenderForNav(f *TMainForm, ndata *navData) {
 	f.contentBox.SetEnabled(false)
 	f.contentBox.Clear()
 
+	// Bolt always uses Key + Value as the columns
+
+	f.contentBox.Columns().Clear()
+	colKey := f.contentBox.Columns().Add()
+	colKey.SetCaption("Key")
+	colKey.SetWidth(MY_WIDTH)
+	colKey.SetAlignment(types.TaLeftJustify)
+	colVal := f.contentBox.Columns().Add()
+	colVal.SetCaption("Value")
+
 	err := ld.db.View(func(tx *bbolt.Tx) error {
 		b := boltTargetBucket(tx, ndata.bucketPath)
 		if b == nil {

main.go

@@ -12,6 +12,11 @@ import (
 	"github.com/ying32/govcl/vcl/types"
 )
 
+const (
+	MY_SPACING = 6
+	MY_WIDTH   = 180
+)
+
 type TMainForm struct {
 	*vcl.TForm
 
@@ -34,9 +39,6 @@ func main() {
 }
 
 func (f *TMainForm) OnFormCreate(sender vcl.IObject) {
-	const MY_SPACING = 6
-	const MY_WIDTH = 180
-
 	f.ImageList = loadImages(f)
 
 	f.SetCaption("yvbolt")
@@ -118,13 +120,7 @@ func (f *TMainForm) OnFormCreate(sender vcl.IObject) {
 	f.contentBox.SetViewStyle(types.VsReport) // "Report style" i.e. has columns
 	f.contentBox.SetAutoWidthLastColumn(true)
 	f.contentBox.SetReadOnly(true)
-	colKey := f.contentBox.Columns().Add()
-	colKey.SetCaption("Key")
-	colKey.SetWidth(MY_WIDTH)
-	colKey.SetAlignment(types.TaLeftJustify)
-	colVal := f.contentBox.Columns().Add()
-	colVal.SetCaption("Value")
-
+	f.contentBox.Columns().Clear()
 }
 
 func (f *TMainForm) OnMnuFileOpenClick(sender vcl.IObject) {

sqlite.go

@@ -8,6 +8,7 @@ import (
 
 	_ "github.com/mattn/go-sqlite3"
 	"github.com/ying32/govcl/vcl"
+	"github.com/ying32/govcl/vcl/types"
 )
 
 const (
@@ -64,13 +65,45 @@ func (ld *sqliteLoadedDatabase) RenderForNav(f *TMainForm, ndata *navData) {
 		// Display table properties
 		f.propertiesBox.SetText(fmt.Sprintf("Selected table %q\n\nSchema:\n\n%s", tableName, schemaStmt))
 
-		// Load column details
-		ld.db.Query(`pragma table_info(?)`, tableName)
-
-		// Select * with small limit
 		f.contentBox.SetEnabled(false)
 		f.contentBox.Clear()
 
+		// Load column details
+		// Use SELECT form instead of common PRAGMA table_info so we can just get names
+		colr, err := ld.db.Query(`SELECT name FROM pragma_table_info(?)`, tableName)
+		if err != nil {
+			vcl.ShowMessageFmt("Failed to load columns for table %q: %s", tableName, err.Error())
+			return
+		}
+		defer colr.Close()
+
+		f.contentBox.Columns().Clear()
+		for colr.Next() {
+
+			var columnName string
+			err = colr.Scan(&columnName)
+			if err != nil {
+				vcl.ShowMessageFmt("Failed to read column names for table %q: %s", tableName, err.Error())
+				return
+			}
+
+			col := f.contentBox.Columns().Add()
+			col.SetCaption(columnName)
+			col.SetWidth(MY_WIDTH)
+			col.SetAlignment(types.TaLeftJustify)
+		}
+		if colr.Err() != nil {
+			vcl.ShowMessageFmt("Failed to load columns for table %q: %s", tableName, err.Error())
+			return
+		}
+		colr.Close() // will be double-closed
+
+		// Select * with small limit
+		// TODO
+
+		// We successfully populated the data grid
+		f.contentBox.SetEnabled(true)
+
 	} else {
 		// ??? unknown