closes #8 - modality

composer.go

@@ -157,6 +157,10 @@ func (c *Composer) moveActiveWindowToBottom() bool {
 		return false
 	}
 
+	if c.topView().Modal() {
+		return false
+	}
+
 	event := Event{Type: EventActivate, X: 0} // send deactivated
 	c.sendEventToActiveView(event)
 
@@ -313,8 +317,7 @@ func (c *Composer) processKeySeq(ev term.Event) bool {
 	if c.ctrlKey == term.KeyCtrlW {
 		switch ev.Key {
 		case term.KeyCtrlH:
-			c.moveActiveWindowToBottom()
-			return true
+			return c.moveActiveWindowToBottom()
 		default:
 			return false
 		}
@@ -361,6 +364,9 @@ func (c *Composer) processMouseClick(ev term.Event) {
 	}
 
 	if c.topView() != view {
+		if c.topView().Modal() {
+			return
+		}
 		event := Event{Type: EventActivate, X: 0} // send 'deactivated'
 		c.sendEventToActiveView(event)
 		c.activateView(view)

consts.go

@@ -208,6 +208,8 @@ const (
 	EventChanged
 	// Button event - button was clicked
 	EventClicked
+	// dialog closed
+	EventDialogClose
 	// Close application
 	EventQuit
 )

interface.go

@@ -53,6 +53,8 @@ type View interface {
 	Screen() Screen
 	Parent() Control
 	HitTest(int, int) HitResult
+	SetModal(bool)
+	Modal() bool
 
 	Paddings() (int, int, int, int)
 	SetPaddings(int, int, int, int)

window.go

@@ -14,6 +14,8 @@ type Window struct {
 	pack     PackType
 	children []Control
 	controls []Control
+	// dialog support
+	modal bool
 }
 
 func NewWindow(parent Screen, x, y, w, h int, title string) *Window {
@@ -460,3 +462,11 @@ func (w *Window) HitTest(x, y int) HitResult {
 
 	return HitInside
 }
+
+func (w *Window) SetModal(modal bool) {
+	w.modal = modal
+}
+
+func (w *Window) Modal() bool {
+	return w.modal
+}