Add the start of a view for objects in a set

internal/ui/window.go

@@ -0,0 +1,46 @@
+package ui
+
+import (
+	"flag"
+
+	"github.com/faiface/pixel"
+	"github.com/faiface/pixel/pixelgl"
+)
+
+var (
+	winX = flag.Int("win-x", 1280, "width of the view-map window")
+	winY = flag.Int("win-y", 1024, "height of the view-map window")
+)
+
+type Window struct {
+	PixelWindow         *pixelgl.Window
+	ButtonEventHandlers map[pixelgl.Button][]func()
+}
+
+// WARE! 0,0 is the *bottom left* of the window
+//
+// To invert things so 0,0 is the *top left*, apply the InvertY` matrix
+func NewWindow(title string) (*Window, error) {
+	cfg := pixelgl.WindowConfig{
+		Title:  title,
+		Bounds: pixel.R(0, 0, float64(*winX), float64(*winY)),
+		VSync:  true,
+	}
+
+	pixelWindow, err := pixelgl.NewWindow(cfg)
+	if err != nil {
+		return nil, err
+	}
+
+	return &Window{
+		PixelWindow: pixelWindow,
+	}, nil
+}
+
+// TODO: a stop or other cancellation mechanism
+func (w *Window) Run(f func()) {
+	for !w.PixelWindow.Closed() {
+		f()
+		w.PixelWindow.Update()
+	}
+}