예제 #1
0
파일: showcase.go 프로젝트: ego008/gowut
func buildTableDemo(event gwu.Event) gwu.Comp {
	p := gwu.NewPanel()

	l := gwu.NewLabel("Tip: Switch to the 'debug' theme (top right) to see cell borders.")
	l.Style().SetColor(gwu.CLR_RED).SetFontStyle(gwu.FONT_STYLE_ITALIC)
	p.Add(l)

	p.AddVSpace(20)
	p.Add(gwu.NewLabel("A simple form aligned with a table:"))
	p.AddVSpace(10)
	t := gwu.NewTable()
	t.SetCellPadding(2)
	t.EnsureSize(2, 2)
	var c gwu.Comp
	t.Add(gwu.NewLabel("User name:"), 0, 0)
	c = gwu.NewTextBox("")
	c.Style().SetWidthPx(160)
	t.Add(c, 0, 1)
	t.Add(gwu.NewLabel("Password:"******"")
	c.Style().SetWidthPx(160)
	t.Add(c, 1, 1)
	t.Add(gwu.NewLabel("Go to:"), 2, 0)
	c = gwu.NewListBox([]string{"Inbox", "User preferences", "Last visited page"})
	c.Style().SetWidthPx(160)
	t.Add(c, 2, 1)
	p.Add(t)

	p.AddVSpace(30)
	p.Add(gwu.NewLabel("Advanced table structure with modified alignment, row and col spans:"))
	p.AddVSpace(10)
	t = gwu.NewTable()
	t.Style().SetBorder2(1, gwu.BRD_STYLE_SOLID, gwu.CLR_GREY)
	t.SetAlign(gwu.HA_RIGHT, gwu.VA_TOP)
	t.EnsureSize(5, 5)
	for row := 0; row < 5; row++ {
		for col := 0; col < 5; col++ {
			t.Add(gwu.NewButton("Button "+strconv.Itoa(row)+strconv.Itoa(col)), row, col)
		}
	}
	t.SetColSpan(2, 1, 2)
	t.SetRowSpan(3, 1, 2)
	t.CellFmt(2, 2).Style().SetSizePx(150, 80)
	t.CellFmt(2, 2).SetAlign(gwu.HA_RIGHT, gwu.VA_BOTTOM)
	t.RowFmt(2).SetAlign(gwu.HA_DEFAULT, gwu.VA_MIDDLE)
	t.CompAt(2, 1).Style().SetFullSize()
	t.CompAt(4, 2).Style().SetFullWidth()
	t.RowFmt(0).Style().SetBackground(gwu.CLR_RED)
	t.RowFmt(1).Style().SetBackground(gwu.CLR_GREEN)
	t.RowFmt(2).Style().SetBackground(gwu.CLR_BLUE)
	t.RowFmt(3).Style().SetBackground(gwu.CLR_GREY)
	t.RowFmt(4).Style().SetBackground(gwu.CLR_TEAL)
	p.Add(t)

	return p
}
예제 #2
0
파일: showcase.go 프로젝트: ego008/gowut
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
}
예제 #3
0
파일: showcase.go 프로젝트: ego008/gowut
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 © 2013-2015 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)
}
예제 #4
0
파일: showcase.go 프로젝트: ego008/gowut
func buildTabPanelDemo(event gwu.Event) gwu.Comp {
	p := gwu.NewPanel()

	t := gwu.NewTabPanel()
	t.Style().SetSizePx(500, 300)

	table := gwu.NewTable()
	table.SetCellPadding(2)
	table.EnsureSize(3, 2)
	table.Add(gwu.NewLabel("Change tab bar placement:"), 0, 0)
	table.Add(gwu.NewLabel("Tab bar horizontal align:"), 1, 0)
	table.Add(gwu.NewLabel("Tab bar vertical align:"), 2, 0)

	placemslb := gwu.NewListBox([]string{"Top", "Right", "Bottom", "Left"})
	placems := []gwu.TabBarPlacement{gwu.TB_PLACEMENT_TOP, gwu.TB_PLACEMENT_RIGHT, gwu.TB_PLACEMENT_BOTTOM, gwu.TB_PLACEMENT_LEFT}
	halignslb := gwu.NewListBox([]string{"Left", "Center", "Right"})
	haligns := []gwu.HAlign{gwu.HA_LEFT, gwu.HA_CENTER, gwu.HA_RIGHT}
	valignslb := gwu.NewListBox([]string{"Top", "Middle", "Bottom"})
	valigns := []gwu.VAlign{gwu.VA_TOP, gwu.VA_MIDDLE, gwu.VA_BOTTOM}
	placemslb.Style().SetFullWidth()
	halignslb.Style().SetFullWidth()
	valignslb.Style().SetFullWidth()
	table.Add(placemslb, 0, 1)
	table.Add(halignslb, 1, 1)
	table.Add(valignslb, 2, 1)

	placemslb.AddEHandlerFunc(func(e gwu.Event) {
		t.SetTabBarPlacement(placems[placemslb.SelectedIdx()])
		e.MarkDirty(t)
	}, gwu.ETYPE_CHANGE)
	halignslb.AddEHandlerFunc(func(e gwu.Event) {
		t.TabBarFmt().SetHAlign(haligns[halignslb.SelectedIdx()])
		e.MarkDirty(t)
	}, gwu.ETYPE_CHANGE)
	valignslb.AddEHandlerFunc(func(e gwu.Event) {
		t.TabBarFmt().SetVAlign(valigns[valignslb.SelectedIdx()])
		e.MarkDirty(t)
	}, gwu.ETYPE_CHANGE)

	p.Add(table)

	fix := gwu.NewCheckBox("Fixed size")
	fix.SetState(true)
	fix.AddEHandlerFunc(func(e gwu.Event) {
		if fix.State() {
			t.Style().SetSizePx(500, 300)
		} else {
			t.Style().SetSize("", "")
		}
		e.MarkDirty(t)
	}, gwu.ETYPE_CLICK)
	p.Add(fix)

	p.AddVSpace(10)
	l := gwu.NewLabel("Click on tabs...")
	l.Style().SetColor(gwu.CLR_GREEN)
	p.Add(l)
	t.AddEHandlerFunc(func(e gwu.Event) {
		l.SetText("Clicked on tab: " + strconv.Itoa(t.Selected()))
		e.MarkDirty(l)
	}, gwu.ETYPE_STATE_CHANGE)
	p.AddVSpace(10)
	c := gwu.NewPanel()
	c.Add(gwu.NewLabel("This is a TabPanel."))
	c.Add(gwu.NewLabel("Click on other tabs to see their content."))
	c.AddVSpace(15)
	c.Add(gwu.NewLabel("Or click here to see what's in the Hollow:"))
	b := gwu.NewButton("Take me to the Hollow!")
	b.AddEHandlerFunc(func(e gwu.Event) {
		t.SetSelected(3)
		e.MarkDirty(t)
	}, gwu.ETYPE_CLICK)
	c.Add(b)
	t.AddString("Home", c)
	c = gwu.NewPanel()
	c.Add(gwu.NewLabel("You have no new messages."))
	t.AddString("Inbox", c)
	c = gwu.NewPanel()
	c.Add(gwu.NewLabel("You have no sent messages."))
	t.AddString("Sent", c)
	c = gwu.NewPanel()
	c.Add(gwu.NewLabel("There is nothing in the hollow."))
	t.AddString("Hollow", c)
	c = gwu.NewPanel()
	tb := gwu.NewTextBox("Click to edit this comment.")
	tb.SetRows(10)
	tb.SetCols(40)
	c.Add(tb)
	t.AddString("Comment", c)
	p.Add(t)

	return p
}
예제 #5
0
파일: login_demo.go 프로젝트: ego008/gowut
func buildPrivateWins(s gwu.Session) {
	// Create and build a window
	win := gwu.NewWindow("main", "Main Window")
	win.Style().SetFullWidth()
	win.SetCellPadding(2)

	p := gwu.NewPanel()
	p.SetLayout(gwu.LAYOUT_HORIZONTAL)
	p.SetCellPadding(2)
	p.Add(gwu.NewLabel("I'm a label! Try clicking on the button=>"))
	p.Add(gwu.NewLink("Google Home", "https://google.com"))
	img := gwu.NewImage("", "https://www.google.com/images/srpr/logo3w.png")
	img.Style().SetSize("25%", "25%")
	p.Add(img)
	win.Add(p)
	button := gwu.NewButton("Click me")
	button.AddEHandler(&MyButtonHandler{text: ":-)"}, gwu.ETYPE_CLICK)
	win.Add(button)
	extraBtns := gwu.NewPanel()
	extraBtns.SetLayout(gwu.LAYOUT_NATURAL)
	button.AddEHandlerFunc(func(e gwu.Event) {
		extraBtn := gwu.NewButton("Extra #" + strconv.Itoa(extraBtns.CompsCount()))
		extraBtn.AddEHandlerFunc(func(e gwu.Event) {
			extraBtn.Parent().Remove(extraBtn)
			e.MarkDirty(extraBtns)
		}, gwu.ETYPE_CLICK)
		extraBtns.Insert(extraBtn, 0)
		e.MarkDirty(extraBtns)
	}, gwu.ETYPE_CLICK)
	win.Add(extraBtns)

	p = gwu.NewPanel()
	p.SetLayout(gwu.LAYOUT_HORIZONTAL)
	p.SetCellPadding(2)
	p.Style().SetBorder2(1, gwu.BRD_STYLE_SOLID, gwu.CLR_BLACK)
	p.Add(gwu.NewLabel("A drop-down list being"))
	wideListBox := gwu.NewListBox([]string{"50", "100", "150", "200", "250"})
	wideListBox.Style().SetWidth("50")
	wideListBox.AddEHandlerFunc(func(e gwu.Event) {
		wideListBox.Style().SetWidth(wideListBox.SelectedValue() + "px")
		e.MarkDirty(wideListBox)
	}, gwu.ETYPE_CHANGE)
	p.Add(wideListBox)
	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) {
		selCount := len(listBox.SelectedIndices())
		countLabel.SetText("Selected count: " + strconv.Itoa(selCount))
		e.MarkDirty(countLabel)
	}, gwu.ETYPE_CHANGE)
	p.Add(countLabel)
	win.Add(p)

	greenCheckBox := gwu.NewCheckBox("I'm a check box. When checked, I'm green!")
	greenCheckBox.AddEHandlerFunc(func(e gwu.Event) {
		if greenCheckBox.State() {
			greenCheckBox.Style().SetBackground(gwu.CLR_GREEN)
		} else {
			greenCheckBox.Style().SetBackground("")
		}
		e.MarkDirty(greenCheckBox)
	}, gwu.ETYPE_CLICK)
	greenCheckBox.AddEHandler(greenHandler, gwu.ETYPE_CLICK)
	win.Add(greenCheckBox)

	table := gwu.NewTable()
	table.SetCellPadding(2)
	table.Style().SetBorder2(1, gwu.BRD_STYLE_SOLID, gwu.CLR_BLACK)
	table.EnsureSize(2, 4)
	table.Add(gwu.NewLabel("TAB-"), 0, 0)
	table.Add(gwu.NewLabel("LE"), 0, 1)
	table.Add(gwu.NewLabel("DE-"), 0, 2)
	table.Add(gwu.NewLabel("MO"), 0, 3)
	table.Add(gwu.NewLabel("Enter your name:"), 1, 0)
	tb := gwu.NewTextBox("")
	tb.AddSyncOnETypes(gwu.ETYPE_KEY_UP)
	table.Add(tb, 1, 1)
	table.Add(gwu.NewLabel("You entered:"), 1, 2)
	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)
	table.Add(nameLabel, 1, 3)
	win.Add(table)

	table = gwu.NewTable()
	table.Style().SetBorder2(1, gwu.BRD_STYLE_SOLID, gwu.CLR_BLACK)
	table.SetAlign(gwu.HA_RIGHT, gwu.VA_TOP)
	table.EnsureSize(5, 5)
	for row := 0; row < 5; row++ {
		group := gwu.NewRadioGroup(strconv.Itoa(row))
		for col := 0; col < 5; col++ {
			radio := gwu.NewRadioButton("= "+strconv.Itoa(col)+" =", group)
			radio.AddEHandlerFunc(func(e gwu.Event) {
				radios := []gwu.RadioButton{radio, radio.Group().PrevSelected()}
				for _, radio := range radios {
					if radio != nil {
						if radio.State() {
							radio.Style().SetBackground(gwu.CLR_GREEN)
						} else {
							radio.Style().SetBackground("")
						}
						e.MarkDirty(radio)
					}
				}
			}, gwu.ETYPE_CLICK)
			table.Add(radio, row, col)
		}
	}
	table.SetColSpan(2, 1, 2)
	table.SetRowSpan(3, 1, 2)
	table.CellFmt(2, 2).Style().SetSizePx(150, 80)
	table.CellFmt(2, 2).SetAlign(gwu.HA_RIGHT, gwu.VA_BOTTOM)
	table.RowFmt(2).Style().SetBackground("#808080")
	table.RowFmt(2).SetAlign(gwu.HA_DEFAULT, gwu.VA_MIDDLE)
	table.RowFmt(3).Style().SetBackground("#d0d0d0")
	table.RowFmt(4).Style().SetBackground("#b0b0b0")
	win.Add(table)

	tabPanel := gwu.NewTabPanel()
	tabPanel.SetTabBarPlacement(gwu.TB_PLACEMENT_TOP)
	for i := 0; i < 6; i++ {
		if i == 3 {
			img := gwu.NewImage("", "https://www.google.com/images/srpr/logo3w.png")
			img.Style().SetWidthPx(100)
			tabPanel.Add(img, gwu.NewLabel("This is some long content, random="+strconv.Itoa(rand.Int())))
			continue
		}
		tabPanel.AddString(strconv.Itoa(i)+". tab", gwu.NewLabel("This is some long content, random="+strconv.Itoa(rand.Int())))
	}
	win.Add(tabPanel)
	tabPanel = gwu.NewTabPanel()
	tabPanel.SetTabBarPlacement(gwu.TB_PLACEMENT_LEFT)
	tabPanel.TabBarFmt().SetVAlign(gwu.VA_BOTTOM)
	for i := 7; i < 11; i++ {
		l := gwu.NewLabel("This is some long content, random=" + strconv.Itoa(rand.Int()))
		if i == 9 {
			img := gwu.NewImage("", "https://www.google.com/images/srpr/logo3w.png")
			img.Style().SetWidthPx(100)
			tabPanel.Add(img, l)
			tabPanel.CellFmt(l).Style().SetSizePx(400, 400)
			continue
		}
		tabPanel.AddString(strconv.Itoa(i)+". tab", l)
		tabPanel.CellFmt(l).Style().SetSizePx(400, 400)
	}
	win.Add(tabPanel)
	s.AddWin(win)

	win2 := gwu.NewWindow("main2", "Main2 Window")
	win2.Add(gwu.NewLabel("This is just a test 2nd window."))
	back := gwu.NewButton("Back")
	back.AddEHandlerFunc(func(e gwu.Event) {
		e.ReloadWin(win.Name())
	}, gwu.ETYPE_CLICK)
	win2.Add(back)
	s.AddWin(win2)
}
예제 #6
0
파일: simple_demo.go 프로젝트: ego008/gowut
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
}