GUI component interaction: Difference between revisions
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End Select
End Sub</syntaxhighlight>
=={{header|V (Vlang)}}==
Grapical
Note: For alternative UI toolkits, check github.com/vlang/awesome-v (Awesome V)
<syntaxhighlight lang="Zig">
import ui
import gx
import rand
const (
win_width = 400
win_height = 40
)
[heap]
struct App {
mut:
window &ui.Window = unsafe {nil}
counter string = "0"
}
fn main() {
mut app := &App{}
app.window = ui.window(
width: win_width
height: win_height
title: "Counter"
mode: .resizable
layout: ui.row(
spacing: 5
margin_: 10
widths: ui.stretch
heights: ui.stretch
children: [
ui.textbox(
max_len: 20
read_only: false
// is_numeric: true // Can enforce only number input
text: &app.counter
),
ui.button(
text: "increment"
bg_color: gx.light_gray
radius: 5
border_color: gx.gray
on_click: app.btn_click_inc
),
ui.button(
text: "random"
bg_color: gx.light_gray
radius: 5
border_color: gx.gray
on_click: app.btn_click_ran
),
]
)
)
ui.run(app.window)
}
fn (mut app App) btn_click_inc(mut btn ui.Button) {
for value in app.counter {
if value.is_digit() == false {
ui.message_box("Only numbers allowed!")
return
}
}
if app.counter.int() < 0 || app.counter.int() > 100 {
ui.message_box("Only numbers between 0 to 100 accepted!\nResetting to 1.")
app.counter = "0"
}
app.counter = (app.counter.int() + 1).str()
}
fn (mut app App) btn_click_ran(mut btn ui.Button) {
ui.message_box('Will jump to random number between 1 and 100.')
app.counter = rand.int_in_range(1, 100) or {0}.str()
}
</syntaxhighlight>
=={{header|Web 68}}==
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