gocui/treeDraw.go

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

package main

import (
	"errors"
	"fmt"
	"strconv"

	"github.com/awesome-gocui/gocui"
	log "go.wit.com/log"
	"go.wit.com/widget"
)

// don't draw widgets that are too far down the window
func (tk *guiWidget) doNotDraw() bool {
	var check bool
	switch tk.WidgetType() {
	case widget.Button:
		check = true
	case widget.Label:
		check = true
	default:
	}
	if !check {
		return false
	}
	win := tk.findParentWindow()
	if win == nil {
		// don't draw anything if you can't find the parent window
		return true
	}

	h := tk.gocuiSize.h0 - win.gocuiSize.h0

	if h > 20 {
		return true
	}

	return false
}

// page widgets in the window
func (tk *guiWidget) pageWidget() *rectType {
	r := new(rectType)

	var check bool
	switch tk.WidgetType() {
	case widget.Button:
		check = true
	case widget.Label:
		check = true
	default:
	}
	if !check {
		return nil
	}
	win := tk.findParentWindow()
	if win == nil {
		// don't draw anything if you can't find the parent window
		return nil
	}

	r.w0 = tk.gocuiSize.w0
	r.h0 = tk.gocuiSize.h0
	r.w1 = tk.gocuiSize.w1
	r.h1 = tk.gocuiSize.h1

	// r.h0 = tk.gocuiSize.h0 - win.gocuiSize.h0

	if r.h0 > 20 {
		return r
	}

	return r
}

// display's the text of the widget in gocui
// deletes the old view if it exists and recreates it
func (tk *guiWidget) drawView() {
	var err error
	log.Log(INFO, "drawView() START", tk.WidgetType(), tk.String())
	if me.baseGui == nil {
		log.Log(ERROR, "drawView() ERROR: me.baseGui == nil", tk)
		return
	}

	if tk.cuiName == "" {
		log.Log(ERROR, "drawView() tk.cuiName was not set for widget", tk)
		tk.cuiName = strconv.Itoa(tk.WidgetId()) + " TK"
	}
	log.Log(INFO, "drawView() labelN =", tk.labelN)

	// this deletes the button from gocui
	me.baseGui.DeleteView(tk.cuiName)
	tk.v = nil

	a := tk.gocuiSize.w0
	b := tk.gocuiSize.h0
	c := tk.gocuiSize.w1
	d := tk.gocuiSize.h1

	/*
		// testing code for paging large windows
		if tk.doNotDraw() {
			return
		}

			if tk.window.pager != 0 {
				if r := tk.pageWidget(); r == nil {
					// if nil, draw whatever it is anyway
				} else {
					if r.Width() == 0 && r.Height() == 0 {
						// don't draw empty stuff
						return
					}
					a = r.w0
					b = r.h0
					c = r.w1
					d = r.h1
				}
			}

			if tk.WidgetType() == widget.Window || tk.WidgetType() == widget.Flag {
				if tk.window.pager != 0 {
					if tk.gocuiSize.Height() > 40 {
						tk.window.large = true
						tk.gocuiSize.h1 = tk.gocuiSize.h0 + 40
						d = tk.gocuiSize.h1
					}
				}
			}
	*/

	// this is all terrible. This sets the title. kinda
	if tk.WidgetType() == widget.Window {
		tk.textResize()
		tk.full.w0 = tk.force.w0
		tk.full.h0 = tk.force.h0

		// for windows, make it the full size
		a = tk.full.w0
		b = tk.full.h0
		c = tk.full.w0 + tk.gocuiSize.Width()
		d = tk.full.h0 + tk.gocuiSize.Height()
	} else {
		if tk.internal {
			// do nothing
		} else {
			tk.textResize() // resize gocui frame to the widget text
		}
		a = tk.gocuiSize.w0
		b = tk.gocuiSize.h0
		c = tk.gocuiSize.w1
		d = tk.gocuiSize.h1
	}

	tk.v, err = me.baseGui.SetView(tk.cuiName, a, b, c, d, 0)
	if err == nil {
		tk.dumpWidget("drawView() err")
		log.Log(ERROR, "drawView() internal plugin error err = nil")
		return
	}
	if !errors.Is(err, gocui.ErrUnknownView) {
		tk.dumpWidget("drawView() err")
		log.Log(ERROR, "drawView() internal plugin error error.IS()", err)
		return
	}

	// this actually sends the text to display to gocui
	tk.v.Wrap = true
	tk.v.Frame = tk.frame
	tk.v.Clear()
	fmt.Fprint(tk.v, tk.labelN)

	// tmp hack to disable buttons on window open
	if tk.WidgetType() == widget.Button {
		if tk.IsEnabled() {
		} else {
			tk.setColorDisable()
		}
	}

	switch tk.WidgetType() {
	case widget.Button:
		if tk.IsEnabled() {
			if tk.isWindowDense() && tk.isInGrid() {
				tk.setColorButtonDense()
			} else {
				tk.setColorButton()
			}
		} else {
			tk.setColorDisable()
		}
	default:
	}
	// if you don't do this here, it will be black & white only
	if tk.color != nil {
		tk.v.FrameColor = tk.color.frame
		tk.v.FgColor = tk.color.fg
		tk.v.BgColor = tk.color.bg
		tk.v.SelFgColor = tk.color.selFg
		tk.v.SelBgColor = tk.color.selBg
	}
	log.Log(INFO, "drawView() END")
}

func (w *guiWidget) DrawAt(offsetW, offsetH int) {
	// w.setColor(&colorActiveW)
	w.placeWidgets(offsetW, offsetH) // compute the sizes & places for each widget
	// w.dumpWidget(fmt.Sprintf("DrawAt(%d,%d)", offsetW, offsetH))
}

func (w *guiWidget) simpleDrawAt(offsetW, offsetH int) {
	// w.setColor(&colorActiveW)
	w.dumpWidget("simpleDrawAt()")
}

// display the widgets in the binary tree
func (w *guiWidget) drawTree(draw bool) {
	if w == nil {
		return
	}
	w.dumpWidget("in drawTree()")
	if draw {
		// w.textResize()
		w.Show()
	} else {
		w.Hide()
	}

	for _, child := range w.children {
		child.drawTree(draw)
	}
}

func (w *guiWidget) Show() {
	if w.isFake {
		// don't display fake widgets
		return
	}

	if w.Hidden() {
		// recursively checks if the parent is hidden
		// never show hidden widgets
		return
	}
	if me.debug {
		w.dumpWidget("drawView()")
	}

	w.drawView()
}