Using custom icons with MainWindow?

[tmm1]

Apps appear to use the default system icon here:

walk/window.go

Line 334 in c5fab5f

hIcon := win.LoadIcon(0, (*uint16)(unsafe.Pointer(uintptr(win.IDI_APPLICATION))))

Is it possible to specify a custom icon? I am already embedding one with rsrc/goversioninfo but its not being used.

[tmm1]

Never mind, I misunderstood what IDI_APPLICATION means. Seems like this might be an issue with goversioninfo.

[tmm1]

The SetIcon method on MainWindow lets you do this.

[tmm1]

I'm still having a hard time figuring this out.

In #157 (comment), it says:

What works for me is using the rsrc tool to embed an icon into the executable and call walk.NewIconFromResourceId to load it for usage as main window icon.

How do you find the correct resource id to load the icon?

[lxn]

There is an old issue on the rsrc repo, please read the text below the code block:
akavel/rsrc#5 (comment)

[tmm1]

Thanks. Looks like the ID is printed out when using rsrc now (but not by goversioninfo, but that uses the same code and IDs). You can also use pedump -R to list out the resources for an exe and find the ID that way.

Also remember to create the MainWindow before calling SetIcon on it. Something like:

MainWindow{
  AssignTo: &mainWindow,
}.Create()
mainWindow.SetIcon(icon)
mainWindow.Run()

[cyclamenkde]

package main

import (
"log"
"strings"

walk "github.com/lxn/walk"
. "github.com/lxn/walk/declarative"

)

func main() {
var inTE, outTE *walk.TextEdit
var mw *walk.MainWindow

icon, _ := walk.NewIconFromFile("favicon.ico")

if _, err := (MainWindow{
	AssignTo: &mw,
	Title:    "SCREAMO",
	MinSize:  Size{600, 400},
	Icon:     icon,
	Layout:   VBox{},
	Children: []Widget{
		HSplitter{
			Children: []Widget{
				TextEdit{AssignTo: &inTE},
				TextEdit{AssignTo: &outTE, ReadOnly: true},
			},
		},
		PushButton{
			Text: "SCREAM",
			OnClicked: func() {
				outTE.SetText(strings.ToUpper(inTE.Text()))
			},
		},
		PushButton{
			Text: "Click",
			OnClicked: func() {
				walk.MsgBox(mw, "hello", inTE.Text(), walk.MsgBoxIconInformation)
			},
		},
	},
}.Run()); err != nil {
	log.Fatal(err)
}

}