ui/eg/windows/main.go

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package main
import (
"os"
"git.kirsle.net/go/render"
"git.kirsle.net/go/render/event"
"git.kirsle.net/go/render/sdl"
"git.kirsle.net/go/ui"
)
// Program globals.
var (
// Size of the MainWindow.
Width = 1024
Height = 768
// Cascade offset for creating multiple windows.
Cascade = render.NewPoint(10, 10)
CascadeStep = render.NewPoint(24, 24)
)
func init() {
sdl.DefaultFontFilename = "../DejaVuSans.ttf"
}
func main() {
mw, err := ui.NewMainWindow("Hello World", Width, Height)
if err != nil {
panic(err)
}
// Add some windows to play with.
addWindow(mw, "First window")
addWindow(mw, "Second window")
mw.SetBackground(render.White)
mw.OnLoop(func(e *event.State) {
if e.Escape {
os.Exit(0)
}
})
mw.MainLoop()
}
// Add a new child window.
func addWindow(mw *ui.MainWindow, title string) {
win1 := ui.NewWindow(title)
win1.Configure(ui.Config{
Width: 640,
Height: 480,
})
win1.Compute(mw.Engine)
win1.Supervise(mw.Supervisor())
// Attach it to the MainWindow with no placement management, i.e.
// instead of Pack() or Place(). Since draggable windows set their own
// position, a position manager would only interfere and "snap" the
// window back into place as soon as you drop the title bar!
// mw.Attach(win1)
// Default placement via cascade.
win1.MoveTo(Cascade)
Cascade.Add(CascadeStep)
// Add a button to the window.
// btn := ui.NewButton("Button1", ui.NewLabel(ui.Label{
// Text: "Click me!",
// }))
// btn.Handle(ui.Click, func(ed ui.EventData) {
// fmt.Printf("Window '%s' button clicked!\n", title)
// })
// mw.Add(btn)
// win1.Place(btn, ui.Place{
// Top: 10,
// Left: 10,
// })
// Add a window duplicator button.
btn2 := ui.NewButton(title+":Button2", ui.NewLabel(ui.Label{
Text: "New Window",
}))
btn2.Handle(ui.Click, func(ed ui.EventData) error {
addWindow(mw, "New Window")
return nil
})
mw.Add(btn2)
win1.Place(btn2, ui.Place{
Top: 10,
Right: 10,
})
}