純Go語言WebUI工具包：Gowut

gowut是一個 功能全面、簡單易用、平臺無關的純go語言WebUI工具包。

例子如下：

package main

import (
        "code.google.com/p/gowut/gwu"
        "strconv"
)
type MyButtonHandler struct {
        counter int
        text    string
}
func (h *MyButtonHandler) HandleEvent(e gwu.Event) {
        if b, isButton := e.Src().(gwu.Button); isButton {
                b.SetText(b.Text() + h.text)
                h.counter++
                b.SetToolTip("You've clicked " + strconv.Itoa(h.counter) + " times!")
                e.MarkDirty(b)
        }
}
func main() {
        // Create and build a window
        win := gwu.NewWindow("main", "Test GUI Window")
        win.Style().SetFullWidth()
        win.SetHAlign(gwu.HA_CENTER)
        win.SetCellPadding(2)

    // Button which changes window content
    win.Add(gwu.NewLabel("I'm a label! Try clicking on the button=>"))
    btn := gwu.NewButton("Click me")
    btn.AddEHandler(&MyButtonHandler{text: ":-)"}, gwu.ETYPE_CLICK)
    win.Add(btn)
    btnsPanel := gwu.NewNaturalPanel()
    btn.AddEHandlerFunc(func(e gwu.Event) {
            // Create and add a new button...
            newbtn := gwu.NewButton("Extra #" + strconv.Itoa(btnsPanel.CompsCount()))
            newbtn.AddEHandlerFunc(func(e gwu.Event) {
                    btnsPanel.Remove(newbtn) // ...which removes itself when clicked
                    e.MarkDirty(btnsPanel)
            }, gwu.ETYPE_CLICK)
            btnsPanel.Insert(newbtn, 0)
            e.MarkDirty(btnsPanel)
    }, gwu.ETYPE_CLICK)
    win.Add(btnsPanel)

    // ListBox examples
    p := gwu.NewHorizontalPanel()
    p.Style().SetBorder2(1, gwu.BRD_STYLE_SOLID, gwu.CLR_BLACK)
    p.SetCellPadding(2)
    p.Add(gwu.NewLabel("A drop-down list being"))
    widelb := gwu.NewListBox([]string{"50", "100", "150", "200", "250"})
    widelb.Style().SetWidth("50")
    widelb.AddEHandlerFunc(func(e gwu.Event) {
            widelb.Style().SetWidth(widelb.SelectedValue() + "px")
            e.MarkDirty(widelb)
    }, gwu.ETYPE_CHANGE)
    p.Add(widelb)
    p.Add(gwu.NewLabel("pixel wide. And a multi-select list:"))
    listBox := gwu.NewListBox([]string{"First", "Second", "Third", "Forth", "Fifth", "Sixth"})
    listBox.SetMulti(true)
    listBox.SetRows(4)
    p.Add(listBox)
    countLabel := gwu.NewLabel("Selected count: 0")
    listBox.AddEHandlerFunc(func(e gwu.Event) {
            countLabel.SetText("Selected count: " + strconv.Itoa(len(listBox.SelectedIndices())))
            e.MarkDirty(countLabel)
    }, gwu.ETYPE_CHANGE)
    p.Add(countLabel)
    win.Add(p)

    // Self-color changer check box
    greencb := gwu.NewCheckBox("I'm a check box. When checked, I'm green!")
    greencb.AddEHandlerFunc(func(e gwu.Event) {
            if greencb.State() {
                    greencb.Style().SetBackground(gwu.CLR_GREEN)
            } else {
                    greencb.Style().SetBackground("")
            }
            e.MarkDirty(greencb)
    }, gwu.ETYPE_CLICK)
    win.Add(greencb)

    // TextBox with echo
    p = gwu.NewHorizontalPanel()
    p.Add(gwu.NewLabel("Enter your name:"))
    tb := gwu.NewTextBox("")
    tb.AddSyncOnETypes(gwu.ETYPE_KEY_UP)
    p.Add(tb)
    p.Add(gwu.NewLabel("You entered:"))
    nameLabel := gwu.NewLabel("")
    nameLabel.Style().SetColor(gwu.CLR_RED)
    tb.AddEHandlerFunc(func(e gwu.Event) {
            nameLabel.SetText(tb.Text())
            e.MarkDirty(nameLabel)
    }, gwu.ETYPE_CHANGE, gwu.ETYPE_KEY_UP)
    p.Add(nameLabel)
    win.Add(p)

    // Create and start a GUI server (omitting error check)
    server := gwu.NewServer("guitest", "localhost:8081")
    server.SetText("Test GUI App")
    server.AddWin(win)
    server.Start("") // Also opens windows list in browser

}</pre> 

結果如下：

 




項目主頁：http://www.baiduhome.net/lib/view/home/1364094806031
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