[windows] support runtime.WindowSetRGBA

v2/pkg/options/default.go

@@ -8,7 +8,6 @@ import (
 var Default = &App{
 	Width:    1024,
 	Height:   768,
-	RGBA:     0xFFFFFFFF,
 	Logger:   logger.NewDefaultLogger(),
 	LogLevel: logger.INFO,
 }

v2/pkg/options/options.go

@@ -26,7 +26,7 @@ type App struct {
 	MaxHeight         int
 	StartHidden       bool
 	HideWindowOnClose bool
-	RGBA              int
+	RGBA              *RGBA
 	Assets            embed.FS
 	Menu              *menu.Menu
 	Logger            logger.Logger `json:"-"`
@@ -42,6 +42,13 @@ type App struct {
 	//Mac     *mac.Options
 }
 
+type RGBA struct {
+	R uint8 `json:"r"`
+	G uint8 `json:"g"`
+	B uint8 `json:"b"`
+	A uint8 `json:"a"`
+}
+
 // MergeDefaults will set the minimum default values for an application
 func MergeDefaults(appoptions *App) {
 	err := mergo.Merge(appoptions, Default)
@@ -49,6 +56,16 @@ func MergeDefaults(appoptions *App) {
 		log.Fatal(err)
 	}
 
+	// DEfault colour. Doesn't work well with mergo
+	if appoptions.RGBA == nil {
+		appoptions.RGBA = &RGBA{
+			R: 255,
+			G: 255,
+			B: 255,
+			A: 255,
+		}
+	}
+
 	// Ensure max and min are valid
 	if appoptions.MinWidth > 0 && appoptions.MaxWidth > 0 {
 		if appoptions.MinWidth > appoptions.MaxWidth {

v2/pkg/runtime/window.go

@@ -2,6 +2,7 @@ package runtime
 
 import (
 	"context"
+	"github.com/wailsapp/wails/v2/pkg/options"
 )
 
 // WindowSetTitle sets the title of the window
@@ -93,3 +94,8 @@ func WindowUnminimise(ctx context.Context) {
 	appFrontend := getFrontend(ctx)
 	appFrontend.WindowUnminimise()
 }
+
+func WindowSetRGBA(ctx context.Context, col *options.RGBA) {
+	appFrontend := getFrontend(ctx)
+	appFrontend.WindowSetRGBA(col)
+}