introduce default KeyPressed behavior

screen.go

@@ -39,6 +39,8 @@ func NewScreen(root View) (*Screen, error) {
 		redrawCh: make(chan struct{}, 1),
 	}
 
+	s.KeyPressed = CloseOnCtrlC(s)
+
 	go s.eventloop()
 	go s.drawloop()
 

utils.go

@@ -3,6 +3,7 @@ package tui
 import (
 	"strings"
 
+	"github.com/gdamore/tcell"
 	"github.com/mattn/go-runewidth"
 )
 
@@ -113,3 +114,21 @@ func ConstrainBufferToAnchor(buf *ViewBuffer, anchor Anchor, width, height int)
 		return buf.Sub(buf.Width()-width, buf.Height()-height, width, height)
 	}
 }
+
+// CloseOnCtrlC returns a KeyPress handler which closes the screen when Ctrl-C is pressed.
+// This is the default behavior for all new screens.
+// CloseOnCtrlC is a shorthand for CloseOnKeyPressed(screen, tcell.KeyCtrlC)
+func CloseOnCtrlC(screen *Screen) func(event *KeyEvent) (consumed bool) {
+	return CloseOnKeyPressed(screen, tcell.KeyCtrlC)
+}
+
+// CloseOnKeyPressed returns a KeyPress handler which closes the screen when the given key is pressed.
+func CloseOnKeyPressed(screen *Screen, key tcell.Key) func(event *KeyEvent) (consumed bool) {
+	return func(event *KeyEvent) (consumed bool) {
+		if event.Key() == key {
+			screen.Stop()
+			return false
+		}
+		return true
+	}
+}