Added icon setting

backends/x/x.go

@@ -7,7 +7,7 @@ import "image"
 import "github.com/jezek/xgb"
 import "github.com/jezek/xgbutil"
 import "github.com/jezek/xgb/xproto"
-// import "github.com/jezek/xgbutil/ewmh"
+import "github.com/jezek/xgbutil/ewmh"
 import "github.com/jezek/xgbutil/xevent"
 import "github.com/jezek/xgbutil/xwindow"
 import "github.com/jezek/xgbutil/xgraphics"
@@ -68,12 +68,46 @@ func (backend *Backend) Run (channel chan(stone.Event)) {
 	}
 }
 
-func (backend *Backend) SetTitle (title string) {
-	
+func (backend *Backend) SetTitle (title string) (err error) {
+	err = ewmh.WmNameSet(backend.connection, backend.window.Id, title)
+	return
 }
 
-func (backend *Backend) SetIcon (icons []image.Image) {
+func (backend *Backend) SetIcon (icons []image.Image) (err error) {
+	wmIcons := []ewmh.WmIcon { }
 	
+	for _, icon := range icons {
+		width  := icon.Bounds().Max.X
+		height := icon.Bounds().Max.Y
+		wmIcon := ewmh.WmIcon {
+			Width:  uint(width),
+			Height: uint(height),
+			Data:   make ([]uint, width * height),
+		}
+
+		// manually convert image data beacuse of course we have to do
+		// this
+		index := 0
+		for y := 0; y < height; y ++ {
+		for x := 0; x < width;  x ++ {
+			r, g, b, a := icon.At(x, y).RGBA()
+			r >>= 8
+			g >>= 8
+			b >>= 8
+			a >>= 8
+			wmIcon.Data[index] =
+				(uint(a) << 24) |
+				(uint(r) << 16) |
+				(uint(g) << 8)  |
+				(uint(b) << 0)
+			index ++
+		}}
+		
+		wmIcons = append(wmIcons, wmIcon)
+	}
+
+	err = ewmh.WmIconSet(backend.connection, backend.window.Id, wmIcons)
+	return
 }
 
 func (backend *Backend) handleXEvent (event xgb.Event) {
@@ -192,6 +226,8 @@ func factory (application *stone.Application) (output stone.Backend, err error)
 		0)
 	backend.window.Map()
 	backend.window.Listen(xproto.EventMaskStructureNotify)
+	backend.SetTitle(application.Title())
+	backend.SetIcon(application.Icon())
 
 	// create a canvas
 	backend.canvas = xgraphics.New (