Context: put context initialization in context.go (not NewMasterWindow)

Context.go

@@ -34,6 +34,28 @@ type context struct {
 	FontAtlas    FontAtlas
 }
 
+func CreateContext(p imgui.Platform, r imgui.Renderer) context {
+	result := context{
+		platform: p,
+		renderer: r,
+	}
+
+	result.FontAtlas = newFontAtlas()
+
+	// Create font
+	if len(result.FontAtlas.defaultFonts) == 0 {
+		io := result.IO()
+		io.Fonts().AddFontDefault()
+		fontAtlas := io.Fonts().TextureDataRGBA32()
+		r.SetFontTexture(fontAtlas)
+	} else {
+		result.FontAtlas.shouldRebuildFontAtlas = true
+		// result.FontAtlas.rebuildFontAtlas()
+	}
+
+	return result
+}
+
 func (c *context) GetRenderer() imgui.Renderer {
 	return c.renderer
 }

MasterWindow.go

@@ -64,28 +64,12 @@ func NewMasterWindow(title string, width, height int, flags MasterWindowFlags) *
 		panic(err)
 	}
 
-	// Assign platform to contex
-	Context.platform = p
-
 	r, err := imgui.NewOpenGL3(io, 1.0)
 	if err != nil {
 		panic(err)
 	}
 
-	// Create context
-	Context.renderer = r
-
-	Context.FontAtlas = newFontAtlas()
-
-	// Create font
-	if len(Context.FontAtlas.defaultFonts) == 0 {
-		io.Fonts().AddFontDefault()
-		fontAtlas := io.Fonts().TextureDataRGBA32()
-		r.SetFontTexture(fontAtlas)
-	} else {
-		Context.FontAtlas.shouldRebuildFontAtlas = true
-		Context.FontAtlas.rebuildFontAtlas()
-	}
+	Context = CreateContext(p, r)
 
 	mw := &MasterWindow{
 		clearColor: [4]float32{0, 0, 0, 1},

examples/bug/main.go

@@ -0,0 +1,35 @@
+package main
+
+import (
+	"fmt"
+
+	"github.com/AllenDang/giu"
+)
+
+const popupID = "somepopupmodal"
+
+func loop() {
+	items := make([]string, 200)
+	for i := range items {
+		items[i] = fmt.Sprintf("Item %d", i)
+	}
+
+	giu.SingleWindow().Layout(
+		giu.Row(
+			giu.ListBox("listbox", items).Size(300, 400),
+			giu.ListBox("listbox2", items).Size(300, 400),
+		),
+		giu.Popup(popupID).Layout(
+			giu.Row(
+				giu.Button("Do something").OnClick(func() { fmt.Println("Something done") }),
+				giu.Button("close me").OnClick(func() { giu.CloseCurrentPopup() }),
+			),
+		),
+		giu.Button("Open popup").OnClick(func() { giu.OpenPopup(popupID) }),
+	)
+}
+
+func main() {
+	wnd := giu.NewMasterWindow("#390 [bug]", 640, 480, 0)
+	wnd.Run(loop)
+}

examples/child/main.go

@@ -0,0 +1,25 @@
+package main
+
+import (
+	"github.com/AllenDang/giu"
+	"github.com/AllenDang/imgui-go"
+)
+
+func loop() {
+	giu.SingleWindow().Layout(
+		giu.Custom(func() {
+			imgui.PushStyleColor(imgui.StyleColorChildBg, imgui.CurrentStyle().GetColor(imgui.StyleColorWindowBg))
+			if imgui.BeginChild("child") {
+				giu.Button("button").Build()
+			}
+			imgui.EndChild()
+			imgui.PopStyleColor()
+		}),
+		giu.Label("label"),
+	)
+}
+
+func main() {
+	wnd := giu.NewMasterWindow("native child layout [demo]", 640, 480, 0)
+	wnd.Run(loop)
+}