User interface toolkit for Go with support for SDL2 and HTML Canvas render targets.
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package ui
import (
"fmt"
"git.kirsle.net/go/render"
)
// Menu is a rectangle that holds menu items.
type Menu struct {
BaseWidget
Name string
body *Frame
}
// NewMenu creates a new Menu. It is hidden by default. Usually you'll
// use it with a MenuButton or in a right-click handler.
func NewMenu(name string) *Menu {
w := &Menu{
Name: name,
body: NewFrame(name + ":Body"),
}
w.body.Configure(Config{
Width: 150,
BorderSize: 12,
BorderStyle: BorderRaised,
Background: render.Grey,
})
w.IDFunc(func() string {
return fmt.Sprintf("Menu<%s>", w.Name)
})
return w
}
// Compute the menu
func (w *Menu) Compute(e render.Engine) {
w.body.Compute(e)
}
// Present the menu
func (w *Menu) Present(e render.Engine, p render.Point) {
w.body.Present(e, p)
}
// AddItem quickly adds an item to a menu.
func (w *Menu) AddItem(label string, command func()) *MenuItem {
menu := NewMenuItem(label, command)
w.Pack(menu)
return menu
}
// Pack a menu item onto the menu.
func (w *Menu) Pack(item *MenuItem) {
w.body.Pack(item, Pack{
Anchor: NE,
// Expand: true,
// Padding: 8,
FillX: true,
})
}
// MenuItem is an item in a Menu.
type MenuItem struct {
Button
Label string
Accelerator string
Command func()
button *Button
}
// NewMenuItem creates a new menu item.
func NewMenuItem(label string, command func()) *MenuItem {
w := &MenuItem{
Label: label,
Command: command,
}
w.IDFunc(func() string {
return fmt.Sprintf("MenuItem<%s>", w.Label)
})
font := DefaultFont
font.Color = render.White
font.PadX = 12
w.Button.child = NewLabel(Label{
Text: label,
Font: font,
})
w.Button.Configure(Config{
Background: render.Blue,
})
w.Button.Handle(Click, func(p render.Point) {
w.Command()
})
// Assign the button
return w
}