GUI fields now trim leading and trailing whitespace:

internal/imgui/imgui.go

@@ -3,6 +3,8 @@ package imgui
 import (
 	"time"
 
+	"mxl-player/internal/sdl"
+
 	cimgui "github.com/AllenDang/cimgui-go/imgui"
 )
 
@@ -17,9 +19,20 @@ func New() *Context {
 	ctx := cimgui.CreateContext()
 	cimgui.SetCurrentContext(ctx)
 	io := cimgui.CurrentIO()
+	cimgui.CurrentPlatformIO().SetClipboardHandler(sdlClipboardHandler{})
 	return &Context{ctx: ctx, io: io}
 }
 
+type sdlClipboardHandler struct{}
+
+func (sdlClipboardHandler) GetClipboard() string {
+	return sdl.GetClipboardText()
+}
+
+func (sdlClipboardHandler) SetClipboard(text string) {
+	sdl.SetClipboardText(text)
+}
+
 func (c *Context) Destroy() {
 	cimgui.DestroyContext()
 }

internal/imgui/input_sdl3.go

@@ -7,6 +7,13 @@ import (
 	cimgui "github.com/AllenDang/cimgui-go/imgui"
 )
 
+const (
+	sdlKModShift uint16 = 0x0001 | 0x0002
+	sdlKModCtrl  uint16 = 0x0040 | 0x0080
+	sdlKModAlt   uint16 = 0x0100 | 0x0200
+	sdlKModGUI   uint16 = 0x0400 | 0x0800
+)
+
 // SDL3 event (128 byte raw buffer) -> imgui
 func (c *Context) ProcessEvent(event *[128]byte) {
 	eventType := *(*uint32)(unsafe.Pointer(&event[0]))
@@ -15,7 +22,9 @@ func (c *Context) ProcessEvent(event *[128]byte) {
 	switch eventType {
 	case sdl.EventKeyDown, sdl.EventKeyUp:
 		scancode := *(*uint32)(unsafe.Pointer(&event[24]))
+		modifiers := *(*uint16)(unsafe.Pointer(&event[32]))
 		down := eventType == sdl.EventKeyDown
+		c.addKeyModifiers(modifiers)
 		key := sdlScancodeToImGuiKey(scancode)
 		if key >= 0 {
 			c.io.AddKeyEvent(key, down)
@@ -47,6 +56,13 @@ func (c *Context) ProcessEvent(event *[128]byte) {
 	}
 }
 
+func (c *Context) addKeyModifiers(modifiers uint16) {
+	c.io.AddKeyEvent(cimgui.ModCtrl, modifiers&sdlKModCtrl != 0)
+	c.io.AddKeyEvent(cimgui.ModShift, modifiers&sdlKModShift != 0)
+	c.io.AddKeyEvent(cimgui.ModAlt, modifiers&sdlKModAlt != 0)
+	c.io.AddKeyEvent(cimgui.ModSuper, modifiers&sdlKModGUI != 0)
+}
+
 func sdlScancodeToImGuiKey(scancode uint32) cimgui.Key {
 	switch scancode {
 	case 40: // SDL_SCANCODE_RETURN
@@ -79,6 +95,10 @@ func sdlScancodeToImGuiKey(scancode uint32) cimgui.Key {
 		return cimgui.KeyLeftAlt
 	case 230: // SDL_SCANCODE_RALT
 		return cimgui.KeyRightAlt
+	case 227: // SDL_SCANCODE_LGUI
+		return cimgui.KeyLeftSuper
+	case 231: // SDL_SCANCODE_RGUI
+		return cimgui.KeyRightSuper
 	default:
 		// Letters A-Z: scancodes 4-29 map to ImGui KeyA-KeyZ
 		if scancode >= 4 && scancode <= 29 {