Add QVariant__Color examples

Add QVariant__Color examples

examples/modelview_color6/main.go

@@ -0,0 +1,50 @@
+package main
+
+import (
+	"fmt"
+	"os"
+
+	qt "github.com/mappu/miqt/qt6"
+)
+
+func main() {
+	qt.NewQApplication(os.Args)
+
+	model := qt.NewQAbstractListModel()
+
+	model.OnRowCount(func(parent *qt.QModelIndex) int {
+		return 1000
+	})
+
+	model.OnData(func(idx *qt.QModelIndex, role int) *qt.QVariant {
+		if !idx.IsValid() {
+			return qt.NewQVariant()
+		}
+
+		switch qt.ItemDataRole(role) {
+		case qt.ForegroundRole:
+			if idx.Row() % 2 == 0 {
+				return qt.NewQVariant4099(qt.NewQColor3(0, 0, 0))
+			} else {
+				return qt.NewQVariant4099(qt.NewQColor3(255, 0, 0))
+			}
+		case qt.BackgroundRole:
+			if idx.Row() % 2 == 0 {
+				return qt.NewQVariant4099(qt.NewQColor3(255, 255, 255))
+			} else {
+				return qt.NewQVariant4099(qt.NewQColor3(80, 80, 80))
+			}
+		case qt.DisplayRole:
+			return qt.NewQVariant14(fmt.Sprintf("this is row %d", idx.Row()))
+
+		default:
+			return qt.NewQVariant()
+		}
+	})
+
+	v := qt.NewQListView2()
+	v.SetModel(model.QAbstractItemModel)
+	v.Show()
+
+	qt.QApplication_Exec()
+}