app: consider main viewport's position when creating windows

pkg/app/app.go

@@ -95,7 +95,8 @@ type App struct {
 
 	TextureLoader common.TextureLoader
 
-	showUsage bool
+	showUsage   bool
+	justStarted bool
 }
 
 // Create creates new app instance
@@ -106,6 +107,7 @@ func Create() (*App, error) {
 		editorConstructors: make(map[hsfiletypes.FileType]editorConstructor),
 		TextureLoader:      common.NewTextureLoader(),
 		abyssWrapper:       abysswrapper.Create(),
+		justStarted:        true,
 	}
 
 	if shouldTerminate := result.parseArgs(); shouldTerminate {
@@ -146,19 +148,21 @@ func (a *App) Run() (err error) {
 		return err
 	}
 
-	if a.config.OpenMostRecentOnStartup && len(a.config.RecentProjects) > 0 {
-		err = a.loadProjectFromFile(a.config.RecentProjects[0])
-		if err != nil {
-			return err
-		}
-	}
-
 	a.masterWindow.Run(a.render)
 
 	return nil
 }
 
 func (a *App) render() {
+	// unfortunately can't do that in Run as this requires imgui.MainViewport
+	if a.justStarted && a.config.OpenMostRecentOnStartup && len(a.config.RecentProjects) > 0 {
+		err := a.loadProjectFromFile(a.config.RecentProjects[0])
+		a.justStarted = false
+		if err != nil {
+			logErr("could not load most recent project on startup: %v", err)
+		}
+	}
+
 	a.TextureLoader.StopLoadingTextures()
 
 	a.renderMainMenuBar()

pkg/window/window.go

@@ -1,6 +1,7 @@
 package window
 
 import (
+	"github.com/AllenDang/cimgui-go/imgui"
 	"github.com/AllenDang/giu"
 	"github.com/gucio321/HellSpawner/pkg/app/state"
 )
@@ -71,3 +72,9 @@ func (t *Window) SetVisible(visible bool) {
 func (t *Window) Cleanup() {
 	t.Visible = false
 }
+
+func (t *Window) Pos(x, y float32) *giu.WindowWidget {
+	// normalize this by main viewports pos
+	pos0 := imgui.MainViewport().Pos()
+	return t.WindowWidget.Pos(x+pos0.X, y+pos0.Y)
+}