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"
)
// Window is a frame with a title bar.
type Window struct {
BaseWidget
Title string
Active bool
// Private widgets.
body *Frame
titleBar *Label
content *Frame
}
// NewWindow creates a new window.
func NewWindow(title string) *Window {
w := &Window{
Title: title,
body: NewFrame("body:" + title),
}
w.IDFunc(func() string {
return fmt.Sprintf("Window<%s>",
w.Title,
)
})
w.body.Configure(Config{
Background: render.Grey,
BorderSize: 2,
BorderStyle: BorderRaised,
})
// Title bar widget.
titleBar := NewLabel(Label{
TextVariable: &w.Title,
Font: render.Text{
Color: render.White,
Size: 10,
Stroke: render.DarkBlue,
Padding: 2,
},
})
titleBar.Configure(Config{
Background: render.Blue,
})
w.body.Pack(titleBar, Pack{
Side: N,
Fill: true,
})
w.titleBar = titleBar
// Window content frame.
content := NewFrame("content:" + title)
content.Configure(Config{
Background: render.Grey,
})
w.body.Pack(content, Pack{
Side: N,
Fill: true,
})
w.content = content
// Set up parent/child relationships
w.body.SetParent(w)
return w
}
// Children returns the window's child widgets.
func (w *Window) Children() []Widget {
return []Widget{
w.body,
}
}
// TitleBar returns the title bar widget.
func (w *Window) TitleBar() *Label {
return w.titleBar
}
// Configure the widget. Color and style changes are passed down to the inner
// content frame of the window.
func (w *Window) Configure(C Config) {
w.BaseWidget.Configure(C)
w.body.Configure(C)
// Don't pass dimensions down any further than the body.
C.Width = 0
C.Height = 0
w.content.Configure(C)
}
// ConfigureTitle configures the title bar widget.
func (w *Window) ConfigureTitle(C Config) {
w.titleBar.Configure(C)
}
// Compute the window.
func (w *Window) Compute(e render.Engine) {
w.body.Compute(e)
}
// Present the window.
func (w *Window) Present(e render.Engine, P render.Point) {
w.body.Present(e, P)
}
// Pack a widget into the window's frame.
func (w *Window) Pack(child Widget, config ...Pack) {
w.content.Pack(child, config...)
}