96 lines
2.2 KiB
Go
96 lines
2.2 KiB
Go
package main
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import (
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"bufio"
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"fmt"
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"os"
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"strings"
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"git.kirsle.net/go/render"
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"git.kirsle.net/go/render/sdl"
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"git.kirsle.net/go/ui"
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)
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var WindowColor = render.SkyBlue
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func init() {
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sdl.DefaultFontFilename = "../DejaVuSans.ttf"
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}
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func main() {
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mw, err := ui.NewMainWindow("ColorPicker Demo", 812, 375)
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if err != nil {
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panic(err)
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}
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mw.SetBackground(WindowColor)
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btn := ui.NewButton("Test", ui.NewLabel(ui.Label{
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Text: "Pick the background color",
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Font: render.Text{
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Size: 32,
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},
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}))
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btn.Handle(ui.Click, func(ed ui.EventData) error {
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colorpicker, err := ui.NewColorPicker(ui.ColorPicker{
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Title: "Select a background color",
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Supervisor: mw.Supervisor(),
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Engine: mw.Engine,
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Color: WindowColor,
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// Until the UI toolkit has normal text entry controls, this work-around
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// allows your application to ask the user to enter a hex color code
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// themselves, using any means available. This is an asynchronous
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// procedure where you are given a callback function to send your answer
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// whenever you have it. For this example, look for the prompt
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// question in your terminal window!
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OnManualInput: func(callback func(render.Color)) {
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// Prompt the user to enter a hex color in the terminal.
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var s string
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fmt.Fprintf(os.Stderr, "Enter a hexadecimal color code> ")
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r := bufio.NewReader(os.Stdin)
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for {
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s, _ = r.ReadString('\n')
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if s != "" {
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break
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}
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}
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// Parse it as a color.
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fmt.Printf("Answer: %s\n", s)
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color, err := render.HexColor(strings.TrimSpace(s))
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if err != nil {
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fmt.Printf("%s\n", err)
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return
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}
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// Ping the callback function with our answer.
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callback(color)
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},
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})
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if err != nil {
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fmt.Printf("Error initializing colorpicker: %s\n", err)
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return err
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}
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colorpicker.Center(mw.Engine.WindowSize())
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colorpicker.Then(func(color render.Color) {
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WindowColor = color
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mw.SetBackground(WindowColor)
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})
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colorpicker.OnCancel(func() {
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fmt.Println("ColorPicker was dismissed by user")
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})
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fmt.Printf("Open ColorPicker: %+v\n", colorpicker)
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colorpicker.Show()
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return nil
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})
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mw.Place(btn, ui.Place{
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Center: true,
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Middle: true,
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})
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mw.MainLoop()
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}
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