From f69ed76700f9a9e69869ec2072adac4be9ab4c69 Mon Sep 17 00:00:00 2001
From: Pieter van Loon <pharmit@pietervanloon.com>
Date: Mon, 27 Dec 2021 11:01:39 +0100
Subject: [PATCH] Add mouse position demonstration to mouse example

---
 _examples/mouse.go | 35 ++++++++++++++++++++++++++++++++++-
 1 file changed, 34 insertions(+), 1 deletion(-)

diff --git a/_examples/mouse.go b/_examples/mouse.go
index 59774eb..5560bd0 100644
--- a/_examples/mouse.go
+++ b/_examples/mouse.go
@@ -34,12 +34,19 @@ func main() {
 }
 
 var initialMouseX, initialMouseY, xOffset int
-var msgMouseDown, movingMsg bool
+var globalMouseDown, msgMouseDown, movingMsg bool
 
 func layout(g *gocui.Gui) error {
+	maxX, maxY := g.Size()
 	if _, err := g.View("msg"); msgMouseDown && err == nil {
 		moveMsg(g)
 	}
+	if v, err := g.SetView("global", -1, -1, maxX, maxY, 0); err != nil {
+		if !errors.Is(err, gocui.ErrUnknownView) {
+			return err
+		}
+		v.Frame = false
+	}
 	if v, err := g.SetView("but1", 2, 2, 22, 7, 0); err != nil {
 		if !errors.Is(err, gocui.ErrUnknownView) {
 			return err
@@ -78,6 +85,9 @@ func keybindings(g *gocui.Gui) error {
 	if err := g.SetKeybinding("", gocui.MouseRelease, gocui.ModNone, mouseUp); err != nil {
 		return err
 	}
+	if err := g.SetKeybinding("", gocui.MouseLeft, gocui.ModNone, globalDown); err != nil {
+		return err
+	}
 	if err := g.SetKeybinding("msg", gocui.MouseLeft, gocui.ModNone, msgDown); err != nil {
 		return err
 	}
@@ -137,6 +147,26 @@ func msgDown(g *gocui.Gui, v *gocui.View) error {
 	return nil
 }
 
+func globalDown(g *gocui.Gui, v *gocui.View) error {
+	globalMouseDown = true
+	mx, my := g.MousePosition()
+	maxX, _ := g.Size()
+	msg := fmt.Sprintf("Mouse down at: %d,%d", mx, my)
+	x := mx - len(msg)/2
+	if x < 0 {
+		x = 0
+	} else if x+len(msg)+1 > maxX-1 {
+		x = maxX - 1 - len(msg) - 1
+	}
+	if v, err := g.SetView("globalDown", x, my-1, x+len(msg)+1, my+1, 0); err != nil {
+		if !errors.Is(err, gocui.ErrUnknownView) {
+			return err
+		}
+		v.WriteString(msg)
+	}
+	return nil
+}
+
 func mouseUp(g *gocui.Gui, v *gocui.View) error {
 	if msgMouseDown {
 		msgMouseDown = false
@@ -146,6 +176,9 @@ func mouseUp(g *gocui.Gui, v *gocui.View) error {
 		} else {
 			g.DeleteView("msg")
 		}
+	} else if globalMouseDown {
+		globalMouseDown = false
+		g.DeleteView("globalDown")
 	}
 	return nil
 }