gocui/dropdown.go

// Copyright 2017-2025 WIT.COM Inc. All rights reserved.
// Use of this source code is governed by the GPL 3.0

package main

// simulates a dropdown menu in gocui

import (
	"fmt"
	"strings"

	log "go.wit.com/log"
	"go.wit.com/toolkits/tree"
	"go.wit.com/widget"
)

// create a new widget in the binary tree
func makeNewFlagWidget(wId int) *guiWidget {
	n := new(tree.Node)
	n.WidgetType = widget.Flag
	n.WidgetId = wId
	n.ParentId = 0

	// store the internal toolkit information
	tk := new(guiWidget)
	tk.frame = true

	tk.node = n
	if tk.node.Parent == nil {
		tk.node.Parent = me.treeRoot
	}

	// set the name used by gocui to the id
	tk.cuiName = fmt.Sprintf("%d DR", wId)

	tk.setColorInput()

	// add this new widget on the binary tree
	tk.parent = me.treeRoot.TK.(*guiWidget)
	if tk.parent == nil {
		panic("makeNewFlagWidget() didn't get treeRoot guiWidget")
	} else {
		tk.parent.children = append(tk.parent.children, tk)
	}

	n.TK = tk
	return tk
}

func (tk *guiWidget) showDropdown() {
	if me.dropdown.tk == nil {
		// should only happen once
		me.dropdown.tk = makeNewFlagWidget(me.dropdown.wId)
		me.dropdown.tk.dumpWidget("init() dropdown")
	}
	if me.dropdown.tk == nil {
		log.Log(GOCUI, "showDropdown() Is Broken!")
		return
	}

	// todo: fix this after switching to protobuf
	me.dropdown.items = []string{} // zero out whatever was there before
	for i, s := range tk.node.Strings() {
		log.Log(GOCUI, "showDropdown()", tk.String(), i, s)
		me.dropdown.items = append(me.dropdown.items, s)
	}
	log.Log(GOCUI, "new dropdown items should be set to:", me.dropdown.items)

	startW, startH := tk.Position()
	log.Log(GOCUI, "showDropdown() SHOWING AT W,H=", startW, startH)
	me.dropdown.tk.Hide()
	me.dropdown.tk.MoveToOffset(startW+3, startH+2)
	me.dropdown.tk.labelN = strings.Join(me.dropdown.items, "\n")
	me.dropdown.tk.Show()
	me.dropdown.active = true
	me.dropdown.callerTK = tk
	me.dropdown.tk.dumpWidget("showDropdown()")
}

// if there is a drop down view active, treat it like a dialog box and close it
func (w *guiWidget) dropdownClicked(mouseW, mouseH int) string {
	w.Hide()
	me.dropdown.active = false

	// only need height to figure out what line in the dropdown menu the user clicked
	_, startH := w.Position()

	itemNumber := mouseH - startH
	items := me.dropdown.items
	// log.Log(GOCUI, "dropdownClicked() look for item", itemNumber, "len(items) =", len(items))
	if itemNumber < 1 {
		return ""
	}

	if len(items) >= itemNumber {
		// log.Log(GOCUI, "dropdownClicked() found", items[itemNumber-1])
		if items[itemNumber-1] != "" {
			if me.dropdown.tk != nil {
				// log.Log(GOCUI, "dropdownClicked() send event for", me.dropdownW.cuiName, me.dropdownW.node.WidgetType)
				me.dropdown.callerTK.SetText(items[itemNumber-1])
				me.dropdown.callerTK.node.SetCurrentS(items[itemNumber-1])
				me.myTree.SendUserEvent(me.dropdown.callerTK.node)
			}
		}
		return items[itemNumber-1]
	}
	return ""
}

/*
func dropdownUnclicked(w, h int) {
	var d *guiWidget

	// examine everything under X & Y on the screen)
	for _, tk := range findByXY(w, h) {
		// tk.dumpWidget("dropdownUnclicked()")
		if tk.node.WidgetType == widget.Dropdown {
			d = tk
		}
	}
	if d == nil {
		// log.Log(GOCUI, fmt.Sprintf("dropdownUnclicked() there was no dropdown widget at (w=%d h=%d)", mouseW, mouseH))
		return
	}
	// log.Log(GOCUI, "dropdownUnclicked()", d.node.Strings(), "end. now try to enable me.dropdownV")
}
*/

func (tk *guiWidget) showTextbox() {
	if me.textbox.tk == nil {
		// should only happen once
		me.textbox.tk = makeNewFlagWidget(me.textbox.wId)
		me.textbox.tk.dumpWidget("init() textbox")
	}
	if me.textbox.tk == nil {
		log.Log(GOCUI, "showTextbox() Is Broken")
		return
	}
	startW, startH := tk.Position()
	// log.Log(GOCUI, "showTextbox() SHOWING AT W,H=", startW, startH)
	me.textbox.tk.MoveToOffset(startW+3, startH+2)
	me.textbox.tk.labelN = "holy cow"
	me.textbox.tk.setColorInput()
	me.textbox.tk.Show()
	me.textbox.active = true
	me.textbox.callerTK = tk
	r := me.textbox.tk.gocuiSize
	me.textbox.tk.full.w0 = r.w0
	me.textbox.tk.full.w1 = r.w1
	me.textbox.tk.full.h0 = r.h0
	me.textbox.tk.full.h1 = r.h1
	me.textbox.tk.dumpWidget("showTextbox()")
}

// updates the text and sends an event back to the application
func (tk *guiWidget) textboxClosed() {
	tk.Hide()
	me.textbox.active = false

	// get the text the user entered
	newname := tk.GetText()

	// change the text of the caller widget
	me.textbox.callerTK.SetText(newname)
	me.textbox.callerTK.node.SetCurrentS(newname)

	// send an event from the plugin with the new string
	me.myTree.SendUserEvent(me.textbox.callerTK.node)
}