User interface toolkit for Go with support for SDL2 and HTML Canvas render targets.
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// Example script for using the Place strategy of ui.Frame.
package main
import (
"git.kirsle.net/go/render"
"git.kirsle.net/go/ui"
)
func main() {
mw, err := ui.NewMainWindow("Frame Placement Demo | Click a Button", 800, 600)
if err != nil {
panic(err)
}
mw.SetBackground(render.White)
// Create a sub-frame with its own buttons packed within.
frame := ui.NewFrame("Blue Frame")
frame.Configure(ui.Config{
Width: 300,
Height: 150,
Background: render.DarkBlue,
BorderSize: 1,
BorderStyle: ui.BorderSunken,
})
mw.Place(frame, ui.Place{
Point: render.NewPoint(80, 80),
})
// Create another frame that attaches itself to the bottom right
// of the window.
frame2 := ui.NewFrame("Red Frame")
frame2.Configure(ui.Config{
Width: 300,
Height: 150,
Background: render.DarkRed,
})
mw.Place(frame2, ui.Place{
Right: 80,
Bottom: 80,
})
// Draw rings of buttons around various widgets. The buttons say things
// like "Top Left", "Top Center", "Left Middle", "Center" etc. encompassing
// all 9 side placement options.
CreateButtons(mw, frame)
CreateButtons(mw, frame2)
CreateButtons(mw, mw.Frame())
mw.MainLoop()
}
// CreateButtons creates a set of Placed buttons around all the edges and
// center of the parent frame.
func CreateButtons(window *ui.MainWindow, parent *ui.Frame) {
// Draw buttons around the edges of the window.
buttons := []struct {
Label string
Place ui.Place
}{
{
Label: "Top Left",
Place: ui.Place{
Point: render.NewPoint(12, 12),
},
},
{
Label: "Top Middle",
Place: ui.Place{
Top: 12,
Center: true,
},
},
{
Label: "Top Right",
Place: ui.Place{
Top: 12,
Right: 12,
},
},
{
Label: "Left Middle",
Place: ui.Place{
Left: 12,
Middle: true,
},
},
{
Label: "Center",
Place: ui.Place{
Center: true,
Middle: true,
},
},
{
Label: "Right Middle",
Place: ui.Place{
Right: 12,
Middle: true,
},
},
{
Label: "Bottom Left",
Place: ui.Place{
Left: 12,
Bottom: 12,
},
},
{
Label: "Bottom Center",
Place: ui.Place{
Bottom: 12,
Center: true,
},
},
{
Label: "Bottom Right",
Place: ui.Place{
Bottom: 12,
Right: 12,
},
},
}
for _, setting := range buttons {
setting := setting
button := ui.NewButton(setting.Label, ui.NewLabel(ui.Label{
Text: setting.Label,
Font: render.Text{
FontFilename: "../DejaVuSans.ttf",
Size: 12,
Color: render.Black,
},
}))
// When clicked, change the window title to ID this button.
button.Handle(ui.Click, func(ed ui.EventData) error {
window.SetTitle(parent.Name + ": " + setting.Label)
return nil
})
parent.Place(button, setting.Place)
window.Add(button)
}
}