gocui/eventMouse.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"

	"github.com/awesome-gocui/gocui"

	"go.wit.com/log"
)

// event triggers when you push down on a mouse button
func msgDown(g *gocui.Gui, v *gocui.View) error {
	initialMouseX, initialMouseY = g.MousePosition()

	w := initialMouseX
	h := initialMouseY

	for _, tk := range findByXY(w, h) {
		tk.dumpWidget("mouseDown()")
	}

	// debugging output
	// log.Log(GOCUI, "msgDown() X,Y", initialMouseX, initialMouseY)

	//
	vx, vy, _, _, err := g.ViewPosition("msg")
	if err == nil {
		xOffset = initialMouseX - vx
		yOffset = initialMouseY - vy
		msgMouseDown = true
	}
	return nil
}

func mouseUp(g *gocui.Gui, v *gocui.View) error {
	w, h := g.MousePosition()

	// useful to debug everything that is being clicked on
	/*
		for _, tk := range findByXY(w, h) {
			tk.dumpWidget("mouseUp()")
		}
	*/

	dropdownUnclicked(w, h)

	if msgMouseDown {
		msgMouseDown = false
		if me.movingMsg {
			me.movingMsg = false
			return nil
		} else {
			g.DeleteView("msg")
		}
	} else if globalMouseDown {
		globalMouseDown = false
		g.DeleteView("globalDown")
	}
	return nil
}

// func isMouseInMsg

// this is where you have to figure out what
// widget was underneath so you can active
// the right response for the toolkit user's app
func mouseDown(g *gocui.Gui, v *gocui.View) error {
	mx, my := g.MousePosition()

	var found bool = false
	for _, tk := range findByXY(mx, my) {
		tk.dumpWidget("mouseDown()")
		found = true
	}
	if !found {
		log.Log(GOCUI, fmt.Sprintf("mouseDown() found nothing at (%d,%d)", mx, my))
	}

	vx0, vy0, vx1, vy1, err := g.ViewPosition("msg")
	if err == nil {
		if mx >= vx0 && mx <= vx1 && my >= vy0 && my <= vy1 {
			return msgDown(g, v)
		}
	}
	globalMouseDown = true

	maxX, _ := g.Size()

	// why was this here?
	// findUnderMouse()

	// TODO: USE THIS TO MAKE TEMPORARY HELP / INSTRUCTION DIALOGS

	// this message will pop up when you click on the magic thing
	// figure out how this works and make it generically useful.
	msg := fmt.Sprintf("This is -222 widget demo. %d,%d", mx, my)
	// dropdownClicked(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
	}
	log.Log(GOCUI, "mouseDown() about to write out message to 'globalDown' view. msg =", msg)
	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
}