From 83f34e602b050a90816de00e381c78f76831a027 Mon Sep 17 00:00:00 2001
From: citrons <citrons@mondecitronne.com>
Date: Fri, 6 Jun 2025 00:46:36 -0500
Subject: mouse handling

---
 tui/event.go  |  2 ++
 tui/layout.go | 27 ++++++++++++++++++++++++++-
 2 files changed, 28 insertions(+), 1 deletion(-)

diff --git a/tui/event.go b/tui/event.go
index 71d2f41..9d7a9a2 100644
--- a/tui/event.go
+++ b/tui/event.go
@@ -24,6 +24,7 @@ type MouseEvent struct {
 	Button int
 	Pressed bool
 	Released bool
+	ReleasedAnywhere bool
 	X, Y int
 	Scroll int
 }
@@ -155,6 +156,7 @@ func parseMouse(ev *Event, ch <-chan termfo.Event) error {
 		ev.Mouse.Button = args[0]
 		ev.Mouse.Pressed = down
 		ev.Mouse.Released = !down
+		ev.Mouse.ReleasedAnywhere = !down
 	}
 
 	return nil
diff --git a/tui/layout.go b/tui/layout.go
index 4caa3a6..1835d72 100644
--- a/tui/layout.go
+++ b/tui/layout.go
@@ -23,6 +23,7 @@ type Box struct {
 	computedSize [2]int
 	computedRect rect
 	isOverflow bool
+	mouseEvent MouseEvent
 }
 
 type BoxSize int
@@ -88,7 +89,7 @@ func top() *Box {
 	return layout.stack[len(layout.stack) - 1]
 }
 
-func Push(id string, box Box) {
+func Push(id string, box Box) MouseEvent {
 	if len(layout.stack) > 0 {
 		top().children = append(top().children, &box)
 	}
@@ -104,6 +105,10 @@ func Push(id string, box Box) {
 	if box.IsOverflow != nil {
 		*box.IsOverflow = b != nil && b.isOverflow
 	}
+	if b != nil {
+		return b.mouseEvent
+	}
+	return MouseEvent{}
 }
 
 func Text(text string, style *Style) {
@@ -456,6 +461,23 @@ func (b *Box) drawComputed(parentRect rect, parentStyle Style) {
 	}
 }
 
+func (b *Box) mouseEvents(ev MouseEvent) {
+	bev := ev
+	bev.X -= b.computedRect.min[0]
+	bev.Y -= b.computedRect.min[1]
+	bev.Pressed = false
+	bev.Released = false
+	if bev.X >= 0 && bev.Y >= 0 &&
+			bev.X < b.computedSize[0] && bev.Y < b.computedSize[1] {
+		bev.Pressed = ev.Pressed
+		bev.Released = ev.Released
+	}
+	b.mouseEvent = bev
+	for _, c := range b.children {
+		c.mouseEvents(ev)
+	}
+}
+
 func DrawLayout() {
 	defer func() {
 		layout.back = layout.front
@@ -478,4 +500,7 @@ func DrawLayout() {
 	parentRect.max = [2]int {size.Width, size.Height}
 	b.computedRect = parentRect
 	b.drawComputed(parentRect, DefaultStyle)
+
+	ev := getLastEvent()
+	b.mouseEvents(ev.Mouse)
 }
-- 
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