func buildSwitchButtonDemo(event gwu.Event) gwu.Comp {
p := gwu.NewPanel()
p.SetCellPadding(1)
row := gwu.NewHorizontalPanel()
row.Add(gwu.NewLabel("Here's an ON/OFF switch which enables/disables the other one:"))
sw := gwu.NewSwitchButton()
sw.SetOnOff("ENB", "DISB")
sw.SetState(true)
row.Add(sw)
p.Add(row)
p.AddVSpace(10)
row = gwu.NewHorizontalPanel()
row.Add(gwu.NewLabel("And the other one:"))
sw2 := gwu.NewSwitchButton()
sw2.SetEnabled(true)
sw2.Style().SetWidthPx(100)
row.Add(sw2)
sw.AddEHandlerFunc(func(e gwu.Event) {
sw2.SetEnabled(sw.State())
e.MarkDirty(sw2)
}, gwu.ETYPE_CLICK)
p.Add(row)
return p
}
func buildPanelDemo(event gwu.Event) gwu.Comp {
p := gwu.NewPanel()
p.Add(gwu.NewLabel("Panel with horizontal layout:"))
h := gwu.NewHorizontalPanel()
for i := 1; i <= 5; i++ {
h.Add(gwu.NewButton("Button " + strconv.Itoa(i)))
}
p.Add(h)
p.AddVSpace(20)
p.Add(gwu.NewLabel("Panel with vertical layout:"))
v := gwu.NewVerticalPanel()
for i := 1; i <= 5; i++ {
v.Add(gwu.NewButton("Button " + strconv.Itoa(i)))
}
p.Add(v)
p.AddVSpace(20)
p.Add(gwu.NewLabel("Panel with natural layout:"))
n := gwu.NewNaturalPanel()
for i := 1; i <= 20; i++ {
n.Add(gwu.NewButton("LONG BUTTON " + strconv.Itoa(i)))
}
p.Add(n)
return p
}
func buildButtonDemo(event gwu.Event) gwu.Comp {
p := gwu.NewPanel()
l := gwu.NewLabel("")
btnp := gwu.NewHorizontalPanel()
b := gwu.NewButton("Normal Button")
b.AddEHandlerFunc(func(e gwu.Event) {
switch e.Type() {
case gwu.ETYPE_MOUSE_OVER:
l.SetText("Mouse is over...")
case gwu.ETYPE_MOUSE_OUT:
l.SetText("Mouse is out.")
case gwu.ETYPE_CLICK:
x, y := e.Mouse()
l.SetText(fmt.Sprintf("Clicked at x=%d, y=%d", x, y))
}
e.MarkDirty(l)
}, gwu.ETYPE_CLICK, gwu.ETYPE_MOUSE_OVER, gwu.ETYPE_MOUSE_OUT)
btnp.Add(b)
b = gwu.NewButton("Disabled Button")
b.SetEnabled(false)
btnp.Add(b)
p.Add(btnp)
p.Add(l)
return p
}
func buildLinkDemo(event gwu.Event) gwu.Comp {
p := gwu.NewPanel()
p.SetCellPadding(3)
p.Add(gwu.NewLink("Visit Gowut Home page", "https://sites.google.com/site/gowebuitoolkit/"))
p.Add(gwu.NewLink("Visit Gowut Project page", "http://code.google.com/p/gowut/"))
row := gwu.NewHorizontalPanel()
row.SetCellPadding(3)
row.Add(gwu.NewLabel("Discussion forum:"))
row.Add(gwu.NewLink("https://groups.google.com/d/forum/gowebuitoolkit", "https://groups.google.com/d/forum/gowebuitoolkit"))
p.Add(row)
row = gwu.NewHorizontalPanel()
row.SetCellPadding(3)
row.Add(gwu.NewLabel("Send e-mail to the Gowut author:"))
email := "iczaaa" + "@" + "gmail.com"
row.Add(gwu.NewLink("András Belicza <"+email+">", "mailto:"+email))
p.Add(row)
return p
}
func buildTextBoxDemo(event gwu.Event) gwu.Comp {
p := gwu.NewPanel()
p.Add(gwu.NewLabel("Enter your name (max 15 characters):"))
row := gwu.NewHorizontalPanel()
tb := gwu.NewTextBox("")
tb.SetMaxLength(15)
tb.AddSyncOnETypes(gwu.ETYPE_KEY_UP)
length := gwu.NewLabel("")
length.Style().SetFontSize("80%").SetFontStyle(gwu.FONT_STYLE_ITALIC)
tb.AddEHandlerFunc(func(e gwu.Event) {
rem := 15 - len(tb.Text())
length.SetText(fmt.Sprintf("(%d character%s left...)", rem, plural(rem)))
e.MarkDirty(length)
}, gwu.ETYPE_CHANGE, gwu.ETYPE_KEY_UP)
row.Add(tb)
row.Add(length)
p.Add(row)
p.AddVSpace(10)
p.Add(gwu.NewLabel("Short biography:"))
bio := gwu.NewTextBox("")
bio.SetRows(5)
bio.SetCols(40)
p.Add(bio)
p.AddVSpace(10)
rtb := gwu.NewTextBox("This is just a read-only text box...")
rtb.SetReadOnly(true)
p.Add(rtb)
p.AddVSpace(10)
dtb := gwu.NewTextBox("...and a disabled one.")
dtb.SetEnabled(false)
p.Add(dtb)
return p
}
func buildListBoxDemo(event gwu.Event) gwu.Comp {
p := gwu.NewPanel()
row := gwu.NewHorizontalPanel()
l := gwu.NewLabel("Select a background color:")
row.Add(l)
lb := gwu.NewListBox([]string{"", "Black", "Red", "Green", "Blue", "White"})
lb.AddEHandlerFunc(func(e gwu.Event) {
l.Style().SetBackground(lb.SelectedValue())
e.MarkDirty(l)
}, gwu.ETYPE_CHANGE)
row.Add(lb)
p.Add(row)
p.AddVSpace(10)
p.Add(gwu.NewLabel("Select numbers that add up to 89:"))
sumLabel := gwu.NewLabel("")
lb2 := gwu.NewListBox([]string{"1", "2", "4", "8", "16", "32", "64", "128"})
lb2.SetMulti(true)
lb2.SetRows(10)
lb2.AddEHandlerFunc(func(e gwu.Event) {
sum := 0
for _, idx := range lb2.SelectedIndices() {
sum += 1 << uint(idx)
}
if sum == 89 {
sumLabel.SetText("Hooray! You did it!")
} else {
sumLabel.SetText(fmt.Sprintf("Now quite there... (sum = %d)", sum))
}
e.MarkDirty(sumLabel)
}, gwu.ETYPE_CHANGE)
p.Add(lb2)
p.Add(sumLabel)
return p
}
func startWebServer() {
tables := gwu.NewHorizontalPanel()
tables.SetVAlign(gwu.VA_TOP)
updateTables(tables)
win := gwu.NewWindow("scrolls", "ClockworkAgent")
win.Style().SetFullWidth()
win.SetHAlign(gwu.HA_CENTER)
win.Style().SetBackground(`
url(images/background.jpg) no-repeat center center fixed;
background-size: cover;
`)
win.Add(tables)
win.AddEHandlerFunc(func(e gwu.Event) {
updateTables(tables)
}, gwu.ETYPE_WIN_LOAD)
server := gwu.NewServer("", "localhost:8080")
server.AddWin(win)
wd, err := os.Getwd()
deny(err)
server.AddStaticDir("images", wd+"/images")
server.Start("scrolls")
}
func buildShowcaseWin(sess gwu.Session) {
win := gwu.NewWindow("show", "Showcase of Features - Gowut")
win.Style().SetFullSize()
win.AddEHandlerFunc(func(e gwu.Event) {
switch e.Type() {
case gwu.ETYPE_WIN_LOAD:
fmt.Println("LOADING window:", e.Src().Id())
case gwu.ETYPE_WIN_UNLOAD:
fmt.Println("UNLOADING window:", e.Src().Id())
}
}, gwu.ETYPE_WIN_LOAD, gwu.ETYPE_WIN_UNLOAD)
hiddenPan := gwu.NewNaturalPanel()
sess.SetAttr("hiddenPan", hiddenPan)
header := gwu.NewHorizontalPanel()
header.Style().SetFullWidth().SetBorderBottom2(2, gwu.BRD_STYLE_SOLID, "#777777")
l := gwu.NewLabel("Gowut - Showcase of Features")
l.Style().SetFontWeight(gwu.FONT_WEIGHT_BOLD).SetFontSize("120%")
header.Add(l)
header.AddHConsumer()
header.Add(gwu.NewLabel("Theme:"))
themes := gwu.NewListBox([]string{"default", "debug"})
themes.AddEHandlerFunc(func(e gwu.Event) {
win.SetTheme(themes.SelectedValue())
e.ReloadWin("show")
}, gwu.ETYPE_CHANGE)
header.Add(themes)
header.AddHSpace(10)
reset := gwu.NewLink("Reset", "#")
reset.SetTarget("")
reset.AddEHandlerFunc(func(e gwu.Event) {
e.RemoveSess()
e.ReloadWin("show")
}, gwu.ETYPE_CLICK)
header.Add(reset)
setNoWrap(header)
win.Add(header)
content := gwu.NewHorizontalPanel()
content.SetCellPadding(1)
content.SetVAlign(gwu.VA_TOP)
content.Style().SetFullSize()
demoWrapper := gwu.NewPanel()
demoWrapper.Style().SetPaddingLeftPx(5)
demoWrapper.AddVSpace(10)
demoTitle := gwu.NewLabel("")
demoTitle.Style().SetFontWeight(gwu.FONT_WEIGHT_BOLD).SetFontSize("110%")
demoWrapper.Add(demoTitle)
demoWrapper.AddVSpace(10)
links := gwu.NewPanel()
links.SetCellPadding(1)
links.Style().SetPaddingRightPx(5)
demos := make(map[string]pdemo)
var selDemo pdemo
selectDemo := func(d pdemo, e gwu.Event) {
if selDemo != nil {
selDemo.link.Style().SetBackground("")
if e != nil {
e.MarkDirty(selDemo.link)
}
demoWrapper.Remove(selDemo.comp)
}
selDemo = d
d.link.Style().SetBackground("#88ff88")
demoTitle.SetText(d.link.Text())
if d.comp == nil {
d.comp = d.buildFunc(e)
}
demoWrapper.Add(d.comp)
if e != nil {
e.MarkDirty(d.link, demoWrapper)
}
}
createDemo := func(name string, buildFunc func(gwu.Event) gwu.Comp) pdemo {
link := gwu.NewLabel(name)
link.Style().SetFullWidth().SetCursor(gwu.CURSOR_POINTER).SetDisplay(gwu.DISPLAY_BLOCK).SetColor(gwu.CLR_BLUE)
demo := &demo{link: link, buildFunc: buildFunc}
link.AddEHandlerFunc(func(e gwu.Event) {
selectDemo(demo, e)
}, gwu.ETYPE_CLICK)
links.Add(link)
demos[name] = demo
return demo
}
links.Style().SetFullHeight().SetBorderRight2(2, gwu.BRD_STYLE_SOLID, "#777777")
links.AddVSpace(5)
homeDemo := createDemo("Home", buildHomeDemo)
selectDemo(homeDemo, nil)
links.AddVSpace(5)
l = gwu.NewLabel("Component Palette")
l.Style().SetFontWeight(gwu.FONT_WEIGHT_BOLD).SetFontSize("110%")
links.Add(l)
links.AddVSpace(5)
l = gwu.NewLabel("Containers")
l.Style().SetFontWeight(gwu.FONT_WEIGHT_BOLD)
links.Add(l)
createDemo("Expander", buildExpanderDemo)
createDemo("Link (as Container)", buildLinkContainerDemo)
createDemo("Panel", buildPanelDemo)
createDemo("Table", buildTableDemo)
createDemo("TabPanel", buildTabPanelDemo)
createDemo("Window", buildWindowDemo)
links.AddVSpace(5)
l = gwu.NewLabel("Input components")
l.Style().SetFontWeight(gwu.FONT_WEIGHT_BOLD).SetDisplay(gwu.DISPLAY_BLOCK)
links.Add(l)
createDemo("CheckBox", buildCheckBoxDemo)
createDemo("ListBox", buildListBoxDemo)
createDemo("TextBox", buildTextBoxDemo)
createDemo("PasswBox", buildPasswBoxDemo)
createDemo("RadioButton", buildRadioButtonDemo)
createDemo("SwitchButton", buildSwitchButtonDemo)
links.AddVSpace(5)
l = gwu.NewLabel("Other components")
l.Style().SetFontWeight(gwu.FONT_WEIGHT_BOLD)
links.Add(l)
createDemo("Button", buildButtonDemo)
createDemo("Html", buildHtmlDemo)
createDemo("Image", buildImageDemo)
createDemo("Label", buildLabelDemo)
createDemo("Link", buildLinkDemo)
createDemo("Timer", buildTimerDemo)
links.AddVConsumer()
setNoWrap(links)
content.Add(links)
content.Add(demoWrapper)
content.CellFmt(demoWrapper).Style().SetFullWidth()
win.Add(content)
win.CellFmt(content).Style().SetFullSize()
footer := gwu.NewHorizontalPanel()
footer.Style().SetFullWidth().SetBorderTop2(2, gwu.BRD_STYLE_SOLID, "#777777")
footer.Add(hiddenPan)
footer.AddHConsumer()
l = gwu.NewLabel("Copyright © 2013 András Belicza. All rights reserved.")
l.Style().SetFontStyle(gwu.FONT_STYLE_ITALIC).SetFontSize("95%")
footer.Add(l)
footer.AddHSpace(10)
link := gwu.NewLink("Visit Gowut Home page", "https://sites.google.com/site/gowebuitoolkit/")
link.Style().SetFontStyle(gwu.FONT_STYLE_ITALIC).SetFontSize("95%")
footer.Add(link)
setNoWrap(footer)
win.Add(footer)
sess.AddWin(win)
}
func buildTimerDemo(event gwu.Event) gwu.Comp {
p := gwu.NewPanel()
p.SetCellPadding(3)
// Add timers to a panel which is always attached instead of our panel
// because the user can switch to another component demo causing this panel to be removed
// and that way timer events would address components that are not part of the window (returning error).
hiddenPan := event.Session().Attr("hiddenPan").(gwu.Panel)
p.Add(gwu.NewLabel("A Timer is used to detonate a bomb after 3 seconds."))
p.AddVSpace(10)
defText := "You can defuse the bomb with the button below. Tick... Tack..."
l := gwu.NewLabel(defText)
p.Add(l)
t := gwu.NewTimer(3 * time.Second)
b := gwu.NewButton("Defuse!")
t.AddEHandlerFunc(func(e gwu.Event) {
l.SetText("BOOOOM! You were too slow!")
l.Style().SetColor(gwu.CLR_RED)
b.SetEnabled(false)
e.MarkDirty(l, b)
}, gwu.ETYPE_STATE_CHANGE)
hiddenPan.Add(t)
row := gwu.NewHorizontalPanel()
b.AddEHandlerFunc(func(e gwu.Event) {
t.SetActive(false)
l.SetText("Bomb defused! Phew! Good Job!")
l.Style().SetColor(gwu.CLR_GREEN)
b.SetEnabled(false)
e.MarkDirty(t, l, b)
}, gwu.ETYPE_CLICK)
row.Add(b)
b2 := gwu.NewButton("Plant a new Bomb!")
b2.AddEHandlerFunc(func(e gwu.Event) {
t.SetActive(true)
t.Reset()
l.SetText(defText)
l.Style().SetColor("")
b.SetEnabled(true)
e.MarkDirty(t, l, b)
}, gwu.ETYPE_CLICK)
row.Add(b2)
p.Add(row)
p.AddVSpace(20)
p.Add(gwu.NewLabel("A Timer is used to refresh the time below repeatedly in every second for half a minute."))
tl := gwu.NewLabel("")
p.Add(tl)
t2 := gwu.NewTimer(time.Second)
t2.SetRepeat(true)
counter := 30
t2.AddEHandlerFunc(func(e gwu.Event) {
counter--
tl.SetText(fmt.Sprintf("%s (%d remaining)", time.Now().Format("2006-01-02 15:04:05"), counter))
e.MarkDirty(tl)
if counter <= 0 {
t2.SetActive(false)
e.MarkDirty(t2)
}
}, gwu.ETYPE_STATE_CHANGE)
hiddenPan.Add(t2)
b3 := gwu.NewButton("Restart")
b3.AddEHandlerFunc(func(e gwu.Event) {
counter = 30
t2.SetActive(true)
e.MarkDirty(t2)
}, gwu.ETYPE_CLICK)
p.Add(b3)
event.MarkDirty(hiddenPan)
return p
}
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
}