[Feature Request] Command-line demo

[enty8080]

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Hey.

That's me again. I am just wondering if it is possible to write a command line using giu. It should wait for user's input in loop and do something when user hits enter.

The main problem is that giu.InputText() appears with a border around the input, but I want a command-line to be a just a prompt, not an input box. Like in a regular terminal emulator or even cmd.exe.

Please, if you have any ideas on how to do this, suggest them.

Thanks in advance.

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[gucio321]

Generally i can't understand what is the problem...
Is you want to modify border (size, rounding etc) take a look on style setter

[enty8080]

@gucio321 Thanks. I am not sure this will work, but I'll try. Moreover, I can't understand why this code from here won't run. - https://github.com/AllenDang/giu/blob/master/examples/issue-501/main.go

I received these errors:

# command-line-arguments
./main.go:27:64: undefined: giu.Action
./main.go:28:19: undefined: giu.Press
./main.go:35:6: wnd.SetAdditionalInputHandlerCallback undefined (type *giu.MasterWindow has no field or method SetAdditionalInputHandlerCallback)

First two giu.Action and giu.Press seems to be defined in Keycode.go in this repository.

Can you please suggest me any solution?

[gucio321]

@enty8080 I can't reproduce your error 😢 On master (git rev-parse HEAD returns da051513855e9e2628cc62fbb19c7ac2b1eec2f5) it compiles successfully. Please make sure if your code is up-to-date.

In case of your issue:
If I understend correctly you'd want to achive something like this?

My code

package main

import (
	"github.com/AllenDang/giu"
	"github.com/AllenDang/imgui-go"
)

var c string

func loop() {
	imgui.PushStyleVarVec2(imgui.StyleVarWindowPadding, imgui.Vec2{0, 0})
	imgui.PushStyleVarFloat(imgui.StyleVarFrameRounding, 0)
	defer imgui.PopStyleVarV(2)
	giu.SingleWindow().Layout(
		giu.InputTextMultiline(&c).Size(-1, -1),
	)
}

func main() {
	wnd := giu.NewMasterWindow("Issue 660 [demo]", 640, 80, 0)
	wnd.Run(loop)
}

[enty8080]

@gucio321 Yeah, and I want to fmt.Println data entered by user after he hits enter button.

[gucio321]

@enty8080 so e.g. like this

package main

import (
	"fmt"

	"github.com/AllenDang/giu"
	"github.com/AllenDang/imgui-go"
)

var c string

func loop() {
	imgui.PushStyleVarVec2(imgui.StyleVarWindowPadding, imgui.Vec2{0, 0})
	imgui.PushStyleVarFloat(imgui.StyleVarFrameRounding, 0)
	defer imgui.PopStyleVarV(2)
	giu.SingleWindow().RegisterKeyboardShortcuts(giu.WindowShortcut{
		Key: giu.KeyEnter,
		Callback: func() {
			fmt.Println(c)
			c = ""
		},
	}).Layout(
		giu.InputTextMultiline(&c).Size(-1, -1),
	)
}

func main() {
	wnd := giu.NewMasterWindow("Issue 660 [demo]", 640, 80, 0)
	wnd.Run(loop)
}

[enty8080]

@gucio321 Thank you very much! May I ask, where did you master giu and imgui-go? I didn't find any documentation on these libraries.

P.S. I made a mistake, it should not print text, it should display it on the screen right below the input. Also, idk why, but c = "" does not clean the variable, it contains all previous commands.

[gucio321]

@gucio321 Thank you very much! May I ask, where did you master giu and imgui-go? I didn't find any documentation on these libraries.

I just was using these libraries for a longer time (especially giu, because I'm not really familiar with imgui-go)
And the documentation (at least in giu) should be present in its source code (let me know if it doesn't) and on godoc https://pkg.go.dev/github.com/AllenDang/giu (but it shows its stage from latest release which was some time ago)

Also, idk why, but c = "" does not clean the variable, it contains all previous commands.

meh it is so tricky... I think you need to play with InputTextCallback.
I managed do this with the following code...

package main

import (
	"github.com/AllenDang/giu"
	"github.com/AllenDang/imgui-go"
)

var (
	c              string
	cmd            string
	isEnterPressed bool
)

func loop() {
	imgui.PushStyleVarVec2(imgui.StyleVarWindowPadding, imgui.Vec2{0, 0})
	imgui.PushStyleVarFloat(imgui.StyleVarFrameRounding, 0)
	defer imgui.PopStyleVarV(2)
	giu.SingleWindow().Layout(
		giu.Label(cmd),
		giu.InputTextMultiline(&c).Size(-1, -1).Callback(func(d imgui.InputTextCallbackData) int32 {
			if isEnterPressed {
				cmd += "\n" + c
				d.DeleteBytes(0, len(d.Buffer()))
				isEnterPressed = false
			}

			// in this particular case, we ar not able to edit buffer (WHY?)
			if d.EventFlag() == imgui.InputTextFlagsCallbackCharFilter {
				if rune(d.EventChar()) == '\n' {
					isEnterPressed = true
				} else {
					isEnterPressed = false
				}
			}

			return 0
		}).Flags(giu.InputTextFlagsCallbackAlways|giu.InputTextFlagsCallbackCharFilter),
	)
}

func main() {
	wnd := giu.NewMasterWindow("Issue 660 [demo]", 640, 80, 0)
	wnd.Run(loop)
}

also ref: #434 (thats not the same but it shows how to use input text callbacks)

[enty8080]

@gucio321 Thanks