Added mouse button press input

examples/draw/main.go

@@ -0,0 +1,65 @@
+package main
+
+import "os"
+import "image"
+import _ "image/png"
+import "git.tebibyte.media/sashakoshka/stone"
+import _ "git.tebibyte.media/sashakoshka/stone/backends/x"
+
+var application = &stone.Application { }
+var mousePressed bool
+
+func main () {
+	application.SetTitle("hellorld")
+	application.SetSize(32, 16)
+
+	iconFile16, err := os.Open("assets/scaffold16.png")
+	if err != nil { panic(err) }
+	icon16, _, err := image.Decode(iconFile16)
+	if err != nil { panic(err) }
+	iconFile16.Close()
+	iconFile32, err := os.Open("assets/scaffold32.png")
+	if err != nil { panic(err) }
+	icon32, _, err := image.Decode(iconFile32)
+	if err != nil { panic(err) }
+	iconFile16.Close()
+	
+	application.SetIcon([]image.Image { icon16, icon32 })
+	
+	channel, err := application.Run()
+	if err != nil { panic(err) }
+	
+	application.Draw()
+
+	for {
+		event := <- channel
+		switch event.(type) {
+		case stone.EventQuit:
+			os.Exit(0)
+
+		case stone.EventPress:
+			event := event.(stone.EventPress)
+			if stone.Button(event) == stone.MouseButtonLeft {
+				mousePressed = true
+				application.SetRune(0, 0, '+')
+				application.Draw()
+			}
+
+		case stone.EventRelease:
+			event := event.(stone.EventRelease)
+			if stone.Button(event) == stone.MouseButtonLeft {
+				mousePressed = false
+				application.SetRune(0, 0, 0)
+				application.Draw()
+			}
+
+		case stone.EventMouseMove:
+			event := event.(stone.EventMouseMove)
+			application.SetRune(event.X, event.Y, '#')
+			application.Draw()
+
+		case stone.EventResize:
+			application.Draw()
+		}
+	}
+}