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v/vlib/ui/examples/users_gui/users.v

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import (
ui
gx
)
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const (
NR_COLS = 3
CELL_HEIGHT = 25
CELL_WIDTH = 100
TABLE_WIDTH = CELL_WIDTH * NR_COLS
)
struct User {
first_name string
last_name string
age int
}
struct Context {
mut:
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first_name ui.TextBox
last_name ui.TextBox
age ui.TextBox
users []User
window &ui.Window
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txt_pos int
}
/*
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// Current V
struct Window {
width: 500
height: 300
title: 'Users'
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body: Layout {
body: [
TextBox {
placeholder: 'First name'
},
TextBox {
placeholder: 'Last name'
},
TextBox {
placeholder: 'Age'
},
Button {
title: 'Add user'
onclick: btn_click
},
]
}
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}
// Improved V
struct Window {
width: 500
height: 300
title: 'Users'
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Layout {
[
TextBox {
placeholder: 'First name'
}
TextBox {
placeholder: 'Last name'
}
TextBox {
placeholder: 'Age'
}
Button {
title: 'Add user'
onclick: btn_click
}
]
}
}
/*
Window {
width: 500
height: 300
title: 'Users'
VLayout {
TextBox {
placeholder: 'First name'
}
TextBox {
placeholder: 'Last name'
}
TextBox {
placeholder: 'Age'
}
Button {
title: 'Add user'
onclick: btn_click
}
}
draw: draw_fn
}
*/
*/
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fn main() {
mut ctx := &Context {
txt_pos: 10
}
ctx.window = ui.new_window(ui.WinCfg {
width: 500
height: 300
title: 'Users'
draw_fn: draw
ptr: ctx
})
ctx.first_name = ctx.add_textbox('First name')
ctx.last_name = ctx.add_textbox('Last name')
ctx.age = ctx.add_textbox('Age')
mut btn := ui.new_button('Add user', ctx.window, btn_click)
btn.widget.set_pos(TABLE_WIDTH + 50, ctx.txt_pos)
for {
ui.wait_events()
}
}
// TODO replace with `fn (ctx mut Context) btn_click() {`
fn btn_click(_ctx &Context) {
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println('users.v: button click')
mut ctx := _ctx// TODO hack
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ctx.users << User {
first_name: ctx.first_name.text()
last_name: ctx.last_name.text()
age: ctx.age.text().int()
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}
ctx.window.refresh()
}
// TODO replace with `fn (ctx mut Context) draw() {`
fn draw(ctx &Context) {
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for i, user in ctx.users {
x := 10
y := 10 + i * CELL_HEIGHT
// Outer border
ui.draw_empty_rect(x, y, TABLE_WIDTH, CELL_HEIGHT, gx.Gray)
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// Vertical separators
ui.draw_line(x + CELL_WIDTH, y, x + CELL_WIDTH, y + CELL_HEIGHT, gx.Gray)
ui.draw_line(x + CELL_WIDTH * 2, y, x + CELL_WIDTH * 2, y + CELL_HEIGHT, gx.Gray)
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// Text values
ui.draw_text_def(x + 5, y + 5, user.first_name)
ui.draw_text_def(x + 5 + CELL_WIDTH, y + 5, user.last_name)
ui.draw_text_def(x + 5 + CELL_WIDTH * 2, y + 5, user.age.str())
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}
}
fn (ctx mut Context) add_textbox(placeholder string) ui.TextBox {
mut txt_box := ui.new_textbox(ctx.window, false)
txt_box.set_placeholder(placeholder)
txt_box.widget.set_pos(TABLE_WIDTH + 50, ctx.txt_pos)
ctx.txt_pos += 30
return txt_box
}