Can't plant flower when the control key is still down.

game.go

@@ -163,6 +163,11 @@ func (g *Game) Load() {
 func (g *Game) Pause() { g.setSpeed(GameSpeedPaused) }
 
 func (g *Game) PlantFlower(id string, tile Point) {
+	if g.Terrain.HasFlower(tile) {
+		// TODO: notify user it tried to plant on tile with flower?
+		return
+	}
+
 	flower, ok := g.Herbarium.Find(id)
 	if !ok {
 		log.Println("user was able to plant a flower that doesn't exist")

gamecontrols.go

@@ -87,7 +87,10 @@ func (c *GameControls) Init(ctx *Context) error {
 	c.game.SpeedChanged().RegisterItf(c.speedChanged)
 	c.game.ToolChanged().RegisterItf(c.toolChanged)
 	c.dialogs.DialogOpened().Register(func() { c.game.Pause() })
-	c.dialogs.DialogClosed().Register(func() { c.game.Resume() })
+	c.dialogs.DialogClosed().Register(func() {
+		c.updateFlowerControls(ctx)
+		c.game.Resume()
+	})
 
 	c.flowers.Background = MustHexColor("#356dad")
 	c.flowers.ButtonLength = 64

map.go

@@ -24,6 +24,11 @@ func (m *Map) DigFlower(pos Point) string {
 	return flower.ID
 }
 
+func (m *Map) HasFlower(pos Point) bool {
+	_, ok := m.Flowers[pos]
+	return ok
+}
+
 func (m *Map) NewFlower(pos Point, id string, traits FlowerTraits) Flower {
 	flower := Flower{
 		ID:     id,

terrainrenderer.go

@@ -42,12 +42,13 @@ func (r *terrainRenderer) Handle(ctx *Context, event sdl.Event) bool {
 	case *sdl.MouseButtonEvent:
 		if r.project.windowInteractRect.IsPointInside(e.X, e.Y) {
 			if e.Type == sdl.MOUSEBUTTONDOWN {
-				if e.Button == sdl.BUTTON_MIDDLE || (e.Button == sdl.BUTTON_LEFT && isControlKeyDown()) {
+				controlKeyDown := isControlKeyDown()
+				if e.Button == sdl.BUTTON_MIDDLE || (e.Button == sdl.BUTTON_LEFT && controlKeyDown) {
 					if !r.drag.IsDragging() {
 						r.drag.Start(Pt(e.X, e.Y))
 					}
 				}
-				if e.Button == sdl.BUTTON_LEFT {
+				if e.Button == sdl.BUTTON_LEFT && !controlKeyDown {
 					pos := r.project.screenToMapInt(e.X, e.Y)
 					r.game.UserClickedTile(pos)
 				}