gocui: working towards correct layout

    make a gocui widget binary tree
    more debugging cleanups
    sample button app displays in gocui
    geometry logic closer to correct
    improvements in gocui layout
    continued attempts to clean up tabs
    dump binary tree
    moving towards proper chan callback()
    deprecate Widget.Name

Signed-off-by: Jeff Carr <[email protected]>

1 files changed, 171 insertions, 0 deletions

diff --git a/toolkit/gocui/mouse.go b/toolkit/gocui/mouse.go
new file mode 100644
index 0000000..196e080
--- /dev/null
+++ b/toolkit/gocui/mouse.go
@@ -0,0 +1,171 @@
+// Copyright 2014 The gocui Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package main
+
+import (
+	"errors"
+	"fmt"
+
+	"github.com/awesome-gocui/gocui"
+)
+
+func MouseMain() {
+	g, err := gocui.NewGui(gocui.OutputNormal, true)
+	if err != nil {
+		panic(err)
+	}
+	defer g.Close()
+
+	me.baseGui = g
+
+	g.Cursor = true
+	g.Mouse = true
+
+	g.SetManagerFunc(layout)
+
+	if err := defaultKeybindings(g); err != nil {
+		panic(err)
+	}
+
+	if err := g.MainLoop(); err != nil && !errors.Is(err, gocui.ErrQuit) {
+		panic(err)
+	}
+}
+
+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
+		}
+		v.SelBgColor = gocui.ColorGreen
+		v.SelFgColor = gocui.ColorBlack
+		fmt.Fprintln(v, "Button 1 - line 1")
+		fmt.Fprintln(v, "Button 1 - line 2")
+		fmt.Fprintln(v, "Button 1 - line 3")
+		fmt.Fprintln(v, "Button 1 - line 4")
+		if _, err := g.SetCurrentView("but1"); err != nil {
+			return err
+		}
+	}
+	if v, err := g.SetView("but2", 24, 2, 44, 4, 0); err != nil {
+		if !errors.Is(err, gocui.ErrUnknownView) {
+			return err
+		}
+		v.SelBgColor = gocui.ColorGreen
+		v.SelFgColor = gocui.ColorBlack
+		fmt.Fprintln(v, "Button 2 - line 1")
+	}
+	*/
+	helplayout(g)
+	updateHighlightedView(g)
+	return nil
+}
+
+func quit(g *gocui.Gui, v *gocui.View) error {
+	return gocui.ErrQuit
+}
+
+func showMsg(g *gocui.Gui, v *gocui.View) error {
+	var l string
+	var err error
+
+	if _, err := g.SetCurrentView(v.Name()); err != nil {
+		return err
+	}
+
+	_, cy := v.Cursor()
+	if l, err = v.Line(cy); err != nil {
+		l = ""
+	}
+
+	maxX, maxY := g.Size()
+	if v, err := g.SetView("msg", maxX/2-10, maxY/2, maxX/2+10, maxY/2+2, 0); err == nil || errors.Is(err, gocui.ErrUnknownView) {
+		v.Clear()
+		v.SelBgColor = gocui.ColorCyan
+		v.SelFgColor = gocui.ColorBlack
+		fmt.Fprintln(v, l)
+	}
+	return nil
+}
+
+func updateHighlightedView(g *gocui.Gui) {
+	mx, my := g.MousePosition()
+	for _, view := range g.Views() {
+		view.Highlight = false
+	}
+	if v, err := g.ViewByPosition(mx, my); err == nil {
+		v.Highlight = true
+	}
+}
+
+func moveMsg(g *gocui.Gui) {
+	mx, my := g.MousePosition()
+	if !movingMsg && (mx != initialMouseX || my != initialMouseY) {
+		movingMsg = true
+	}
+	g.SetView("msg", mx-xOffset, my-yOffset, mx-xOffset+20, my-yOffset+2, 0)
+}
+
+func msgDown(g *gocui.Gui, v *gocui.View) error {
+	initialMouseX, initialMouseY = g.MousePosition()
+	if vx, vy, _, _, err := g.ViewPosition("msg"); err == nil {
+		xOffset = initialMouseX - vx
+		yOffset = initialMouseY - vy
+		msgMouseDown = true
+	}
+	return nil
+}
+
+func globalDown(g *gocui.Gui, v *gocui.View) error {
+	mx, my := g.MousePosition()
+	if vx0, vy0, vx1, vy1, err := g.ViewPosition("msg"); err == nil {
+		if mx >= vx0 && mx <= vx1 && my >= vy0 && my <= vy1 {
+			return msgDown(g, v)
+		}
+	}
+	globalMouseDown = true
+	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
+		if movingMsg {
+			movingMsg = false
+			return nil
+		} else {
+			g.DeleteView("msg")
+		}
+	} else if globalMouseDown {
+		globalMouseDown = false
+		g.DeleteView("globalDown")
+	}
+	return nil
+}