Moved the examples into their final places.

4 files changed, 1092 insertions, 0 deletions

diff --git a/examples/controlgallery.go b/examples/controlgallery.go
new file mode 100644
index 0000000..d77bebe
--- /dev/null
+++ b/examples/controlgallery.go
@@ -0,0 +1,222 @@
+// 12 august 2018
+
+// +build OMIT
+
+package main
+
+import (
+	"github.com/andlabs/ui"
+)
+
+var mainwin *ui.Window
+
+func makeBasicControlsPage() ui.Control {
+	vbox := ui.NewVerticalBox()
+	vbox.SetPadded(true)
+
+	hbox := ui.NewHorizontalBox()
+	hbox.SetPadded(true)
+	vbox.Append(hbox, false)
+
+	hbox.Append(ui.NewButton("Button"), false)
+	hbox.Append(ui.NewCheckbox("Checkbox"), false)
+
+	vbox.Append(ui.NewLabel("This is a label. Right now, labels can only span one line."), false)
+
+	vbox.Append(ui.NewHorizontalSeparator(), false)
+
+	group := ui.NewGroup("Entries")
+	group.SetMargined(true)
+	vbox.Append(group, true)
+
+group.SetChild(ui.NewNonWrappingMultilineEntry())
+
+	entryForm := ui.NewForm()
+	entryForm.SetPadded(true)
+	group.SetChild(entryForm)
+
+	entryForm.Append("Entry", ui.NewEntry(), false)
+	entryForm.Append("Password Entry", ui.NewPasswordEntry(), false)
+	entryForm.Append("Search Entry", ui.NewSearchEntry(), false)
+	entryForm.Append("Multiline Entry", ui.NewMultilineEntry(), true)
+	entryForm.Append("Multiline Entry No Wrap", ui.NewNonWrappingMultilineEntry(), true)
+
+	return vbox
+}
+
+func makeNumbersPage() ui.Control {
+	hbox := ui.NewHorizontalBox()
+	hbox.SetPadded(true)
+
+	group := ui.NewGroup("Numbers")
+	group.SetMargined(true)
+	hbox.Append(group, true)
+
+	vbox := ui.NewVerticalBox()
+	vbox.SetPadded(true)
+	group.SetChild(vbox)
+
+	spinbox := ui.NewSpinbox(0, 100)
+	slider := ui.NewSlider(0, 100)
+	pbar := ui.NewProgressBar()
+	spinbox.OnChanged(func(*ui.Spinbox) {
+		slider.SetValue(spinbox.Value())
+		pbar.SetValue(spinbox.Value())
+	})
+	slider.OnChanged(func(*ui.Slider) {
+		spinbox.SetValue(slider.Value())
+		pbar.SetValue(slider.Value())
+	})
+	vbox.Append(spinbox, false)
+	vbox.Append(slider, false)
+	vbox.Append(pbar, false)
+
+	ip := ui.NewProgressBar()
+	ip.SetValue(-1)
+	vbox.Append(ip, false)
+
+	group = ui.NewGroup("Lists")
+	group.SetMargined(true)
+	hbox.Append(group, true)
+
+	vbox = ui.NewVerticalBox()
+	vbox.SetPadded(true)
+	group.SetChild(vbox)
+
+	cbox := ui.NewCombobox()
+	cbox.Append("Combobox Item 1")
+	cbox.Append("Combobox Item 2")
+	cbox.Append("Combobox Item 3")
+	vbox.Append(cbox, false)
+
+	ecbox := ui.NewEditableCombobox()
+	ecbox.Append("Editable Item 1")
+	ecbox.Append("Editable Item 2")
+	ecbox.Append("Editable Item 3")
+	vbox.Append(ecbox, false)
+
+	rb := ui.NewRadioButtons()
+	rb.Append("Radio Button 1")
+	rb.Append("Radio Button 2")
+	rb.Append("Radio Button 3")
+	vbox.Append(rb, false)
+
+	return hbox
+}
+
+func makeDataChoosersPage() ui.Control {
+	hbox := ui.NewHorizontalBox()
+	hbox.SetPadded(true)
+
+	vbox := ui.NewVerticalBox()
+	vbox.SetPadded(true)
+	hbox.Append(vbox, false)
+
+	vbox.Append(ui.NewDatePicker(), false)
+	vbox.Append(ui.NewTimePicker(), false)
+	vbox.Append(ui.NewDateTimePicker(), false)
+	vbox.Append(ui.NewFontButton(), false)
+	vbox.Append(ui.NewColorButton(), false)
+
+	hbox.Append(ui.NewVerticalSeparator(), false)
+
+	vbox = ui.NewVerticalBox()
+	vbox.SetPadded(true)
+	hbox.Append(vbox, true)
+
+	grid := ui.NewGrid()
+	grid.SetPadded(true)
+	vbox.Append(grid, false)
+
+	button := ui.NewButton("Open File")
+	entry := ui.NewEntry()
+	entry.SetReadOnly(true)
+	button.OnClicked(func(*ui.Button) {
+		filename := ui.OpenFile(mainwin)
+		if filename == "" {
+			filename = "(cancelled)"
+		}
+		entry.SetText(filename)
+	})
+	grid.Append(button,
+		0, 0, 1, 1,
+		false, ui.AlignFill, false, ui.AlignFill)
+	grid.Append(entry,
+		1, 0, 1, 1,
+		true, ui.AlignFill, false, ui.AlignFill)
+
+	button = ui.NewButton("Save File")
+	entry2 := ui.NewEntry()
+	entry2.SetReadOnly(true)
+	button.OnClicked(func(*ui.Button) {
+		filename := ui.SaveFile(mainwin)
+		if filename == "" {
+			filename = "(cancelled)"
+		}
+		entry2.SetText(filename)
+	})
+	grid.Append(button,
+		0, 1, 1, 1,
+		false, ui.AlignFill, false, ui.AlignFill)
+	grid.Append(entry2,
+		1, 1, 1, 1,
+		true, ui.AlignFill, false, ui.AlignFill)
+
+	msggrid := ui.NewGrid()
+	msggrid.SetPadded(true)
+	grid.Append(msggrid,
+		0, 2, 2, 1,
+		false, ui.AlignCenter, false, ui.AlignStart)
+
+	button = ui.NewButton("Message Box")
+	button.OnClicked(func(*ui.Button) {
+		ui.MsgBox(mainwin,
+			"This is a normal message box.",
+			"More detailed information can be shown here.")
+	})
+	msggrid.Append(button,
+		0, 0, 1, 1,
+		false, ui.AlignFill, false, ui.AlignFill)
+	button = ui.NewButton("Error Box")
+	button.OnClicked(func(*ui.Button) {
+		ui.MsgBoxError(mainwin,
+			"This message box describes an error.",
+			"More detailed information can be shown here.")
+	})
+	msggrid.Append(button,
+		1, 0, 1, 1,
+		false, ui.AlignFill, false, ui.AlignFill)
+
+	return hbox
+}
+
+func setupUI() {
+	mainwin = ui.NewWindow("libui Control Gallery", 640, 480, true)
+	mainwin.OnClosing(func(*ui.Window) bool {
+		ui.Quit()
+		return true
+	})
+	ui.OnShouldQuit(func() bool {
+		mainwin.Destroy()
+		return true
+	})
+
+	tab := ui.NewTab()
+	mainwin.SetChild(tab)
+	mainwin.SetMargined(true)
+
+	tab.Append("Basic Controls", makeBasicControlsPage())
+	tab.SetMargined(0, true)
+
+	tab.Append("Numbers and Lists", makeNumbersPage())
+	tab.SetMargined(1, true)
+
+	tab.Append("Data Choosers", makeDataChoosersPage())
+	tab.SetMargined(2, true)
+
+	mainwin.Show()
+}
+
+func main() {
+	ui.Main(setupUI)
+}
diff --git a/examples/drawtext.go b/examples/drawtext.go
new file mode 100644
index 0000000..a32b14b
--- /dev/null
+++ b/examples/drawtext.go
@@ -0,0 +1,167 @@
+// 19 august 2018
+
+// +build OMIT
+
+package main
+
+// TODO probably a bug in libui: changing the font away from skia leads to a crash
+
+import (
+	"github.com/andlabs/ui"
+)
+
+var (
+	fontButton *ui.FontButton
+	alignment *ui.Combobox
+
+	attrstr *ui.AttributedString
+)
+
+func appendWithAttributes(what string, attrs ...ui.Attribute) {
+	start := len(attrstr.String())
+	end := start + len(what)
+	attrstr.AppendUnattributed(what)
+	for _, a := range attrs {
+		attrstr.SetAttribute(a, start, end)
+	}
+}
+
+func makeAttributedString() {
+	attrstr = ui.NewAttributedString(
+		"Drawing strings with package ui is done with the ui.AttributedString and ui.DrawTextLayout objects.\n" +
+		"ui.AttributedString lets you have a variety of attributes: ")
+
+	appendWithAttributes("font family", ui.TextFamily("Courier New"))
+	attrstr.AppendUnattributed(", ")
+
+	appendWithAttributes("font size", ui.TextSize(18))
+	attrstr.AppendUnattributed(", ")
+
+	appendWithAttributes("font weight", ui.TextWeightBold)
+	attrstr.AppendUnattributed(", ")
+
+	appendWithAttributes("font italicness", ui.TextItalicItalic)
+	attrstr.AppendUnattributed(", ")
+
+	appendWithAttributes("font stretch", ui.TextStretchCondensed)
+	attrstr.AppendUnattributed(", ")
+
+	appendWithAttributes("text color", ui.TextColor{0.75, 0.25, 0.5, 0.75})
+	attrstr.AppendUnattributed(", ")
+
+	appendWithAttributes("text background color", ui.TextBackground{0.5, 0.5, 0.25, 0.5})
+	attrstr.AppendUnattributed(", ")
+
+	appendWithAttributes("underline style", ui.UnderlineSingle)
+	attrstr.AppendUnattributed(", ")
+
+	attrstr.AppendUnattributed("and ")
+	appendWithAttributes("underline color",
+		ui.UnderlineDouble,
+		ui.UnderlineColorCustom{1.0, 0.0, 0.5, 1.0})
+	attrstr.AppendUnattributed(". ")
+
+	attrstr.AppendUnattributed("Furthermore, there are attributes allowing for ")
+	appendWithAttributes("special underlines for indicating spelling errors",
+		ui.UnderlineSuggestion,
+		ui.UnderlineColorSpelling)
+	attrstr.AppendUnattributed(" (and other types of errors) ")
+
+	attrstr.AppendUnattributed("and control over OpenType features such as ligatures (for instance, ")
+	appendWithAttributes("afford", ui.OpenTypeFeatures{
+		ui.ToOpenTypeTag('l', 'i', 'g', 'a'):		0,
+	})
+	attrstr.AppendUnattributed(" vs. ")
+	appendWithAttributes("afford", ui.OpenTypeFeatures{
+		ui.ToOpenTypeTag('l', 'i', 'g', 'a'):		1,
+	})
+	attrstr.AppendUnattributed(").\n")
+
+	attrstr.AppendUnattributed("Use the controls opposite to the text to control properties of the text.")
+}
+
+type areaHandler struct{}
+
+func (areaHandler) Draw(a *ui.Area, p *ui.AreaDrawParams) {
+	tl := ui.DrawNewTextLayout(&ui.DrawTextLayoutParams{
+		String:		attrstr,
+		DefaultFont:	fontButton.Font(),
+		Width:		p.AreaWidth,
+		Align:		ui.DrawTextAlign(alignment.Selected()),
+	})
+	defer tl.Free()
+	p.Context.Text(tl, 0, 0)
+}
+
+func (areaHandler) MouseEvent(a *ui.Area, me *ui.AreaMouseEvent) {
+	// do nothing
+}
+
+func (areaHandler) MouseCrossed(a *ui.Area, left bool) {
+	// do nothing
+}
+
+func (areaHandler) DragBroken(a *ui.Area) {
+	// do nothing
+}
+
+func (areaHandler) KeyEvent(a *ui.Area, ke *ui.AreaKeyEvent) (handled bool) {
+	// reject all keys
+	return false
+}
+
+func setupUI() {
+	makeAttributedString()
+
+	mainwin := ui.NewWindow("libui Text-Drawing Example", 640, 480, true)
+	mainwin.SetMargined(true)
+	mainwin.OnClosing(func(*ui.Window) bool {
+		mainwin.Destroy()
+		ui.Quit()
+		return false
+	})
+	ui.OnShouldQuit(func() bool {
+		mainwin.Destroy()
+		return true
+	})
+
+	hbox := ui.NewHorizontalBox()
+	hbox.SetPadded(true)
+	mainwin.SetChild(hbox)
+
+	vbox := ui.NewVerticalBox()
+	vbox.SetPadded(true)
+	hbox.Append(vbox, false)
+
+	area := ui.NewArea(areaHandler{})
+
+	fontButton = ui.NewFontButton()
+	fontButton.OnChanged(func(*ui.FontButton) {
+		area.QueueRedrawAll()
+	})
+	vbox.Append(fontButton, false)
+
+	form := ui.NewForm()
+	form.SetPadded(true)
+	// TODO on OS X if this is set to 1 then the window can't resize; does the form not have the concept of stretchy trailing space?
+	vbox.Append(form, false)
+
+	alignment = ui.NewCombobox()
+	// note that the items match with the values of the uiDrawTextAlign values
+	alignment.Append("Left")
+	alignment.Append("Center")
+	alignment.Append("Right")
+	alignment.SetSelected(0)		// start with left alignment
+	alignment.OnSelected(func(*ui.Combobox) {
+		area.QueueRedrawAll()
+	})
+	form.Append("Alignment", alignment, false)
+
+	hbox.Append(area, true)
+
+	mainwin.Show()
+}
+
+func main() {
+	ui.Main(setupUI)
+}
diff --git a/examples/histogram.go b/examples/histogram.go
new file mode 100644
index 0000000..610d65a
--- /dev/null
+++ b/examples/histogram.go
@@ -0,0 +1,253 @@
+// 12 august 2018
+
+// +build OMIT
+
+package main
+
+import (
+	"math/rand"
+	"time"
+
+	"github.com/andlabs/ui"
+)
+
+var (
+	histogram *ui.Area
+	datapoints [10]*ui.Spinbox
+	colorButton *ui.ColorButton
+
+	currentPoint = -1
+)
+
+// some metrics
+const (
+	xoffLeft = 20		// histogram margins
+	yoffTop = 20
+	xoffRight = 20
+	yoffBottom = 20
+	pointRadius = 5
+)
+
+// helper to quickly set a brush color
+func mkSolidBrush(color uint32, alpha float64) *ui.DrawBrush {
+	brush := new(ui.DrawBrush)
+	brush.Type = ui.DrawBrushTypeSolid
+	component := uint8((color >> 16) & 0xFF)
+	brush.R = float64(component) / 255
+	component = uint8((color >> 8) & 0xFF)
+	brush.G = float64(component) / 255
+	component = uint8(color & 0xFF)
+	brush.B = float64(component) / 255
+	brush.A = alpha
+	return brush
+}
+
+// and some colors
+// names and values from https://msdn.microsoft.com/en-us/library/windows/desktop/dd370907%28v=vs.85%29.aspx
+const (
+	colorWhite = 0xFFFFFF
+	colorBlack = 0x000000
+	colorDodgerBlue = 0x1E90FF
+)
+
+func pointLocations(width, height float64) (xs, ys [10]float64) {
+	xincr := width / 9		// 10 - 1 to make the last point be at the end
+	yincr := height / 100
+	for i := 0; i < 10; i++ {
+		// get the value of the point
+		n := datapoints[i].Value()
+		// because y=0 is the top but n=0 is the bottom, we need to flip
+		n = 100 - n
+		xs[i] = xincr * float64(i)
+		ys[i] = yincr * float64(n)
+	}
+	return xs, ys
+}
+
+func constructGraph(width, height float64, extend bool) *ui.DrawPath {
+	xs, ys := pointLocations(width, height)
+	path := ui.DrawNewPath(ui.DrawFillModeWinding)
+
+	path.NewFigure(xs[0], ys[0])
+	for i := 1; i < 10; i++ {
+		path.LineTo(xs[i], ys[i])
+	}
+
+	if extend {
+		path.LineTo(width, height)
+		path.LineTo(0, height)
+		path.CloseFigure()
+	}
+
+	path.End()
+	return path
+}
+
+func graphSize(clientWidth, clientHeight float64) (graphWidth, graphHeight float64) {
+	return clientWidth - xoffLeft - xoffRight,
+		clientHeight - yoffTop - yoffBottom
+}
+
+type areaHandler struct{}
+
+func (areaHandler) Draw(a *ui.Area, p *ui.AreaDrawParams) {
+	// fill the area with white
+	brush := mkSolidBrush(colorWhite, 1.0)
+	path := ui.DrawNewPath(ui.DrawFillModeWinding)
+	path.AddRectangle(0, 0, p.AreaWidth, p.AreaHeight)
+	path.End()
+	p.Context.Fill(path, brush)
+	path.Free()
+
+	graphWidth, graphHeight := graphSize(p.AreaWidth, p.AreaHeight)
+
+	sp := &ui.DrawStrokeParams{
+		Cap:			ui.DrawLineCapFlat,
+		Join:			ui.DrawLineJoinMiter,
+		Thickness:	2,
+		MiterLimit:	ui.DrawDefaultMiterLimit,
+	}
+
+	// draw the axes
+	brush = mkSolidBrush(colorBlack, 1.0)
+	path = ui.DrawNewPath(ui.DrawFillModeWinding)
+	path.NewFigure(xoffLeft, yoffTop)
+	path.LineTo(xoffLeft, yoffTop + graphHeight)
+	path.LineTo(xoffLeft + graphWidth, yoffTop + graphHeight)
+	path.End()
+	p.Context.Stroke(path, brush, sp)
+	path.Free()
+
+	// now transform the coordinate space so (0, 0) is the top-left corner of the graph
+	m := ui.DrawNewMatrix()
+	m.Translate(xoffLeft, yoffTop)
+	p.Context.Transform(m)
+
+	// now get the color for the graph itself and set up the brush
+	graphR, graphG, graphB, graphA := colorButton.Color()
+	brush.Type = ui.DrawBrushTypeSolid
+	brush.R = graphR
+	brush.G = graphG
+	brush.B = graphB
+	// we set brush.A below to different values for the fill and stroke
+
+	// now create the fill for the graph below the graph line
+	path = constructGraph(graphWidth, graphHeight, true)
+	brush.A = graphA / 2
+	p.Context.Fill(path, brush)
+	path.Free()
+
+	// now draw the histogram line
+	path = constructGraph(graphWidth, graphHeight, false)
+	brush.A = graphA
+	p.Context.Stroke(path, brush, sp)
+	path.Free()
+
+	// now draw the point being hovered over
+	if currentPoint != -1 {
+		xs, ys := pointLocations(graphWidth, graphHeight)
+		path = ui.DrawNewPath(ui.DrawFillModeWinding)
+		path.NewFigureWithArc(
+			xs[currentPoint], ys[currentPoint],
+			pointRadius,
+			0, 6.23,		// TODO pi
+			false)
+		path.End()
+		// use the same brush as for the histogram lines
+		p.Context.Fill(path, brush)
+		path.Free()
+	}
+}
+
+func inPoint(x, y float64, xtest, ytest float64) bool {
+	// TODO switch to using a matrix
+	x -= xoffLeft
+	y -= yoffTop
+	return (x >= xtest - pointRadius) &&
+		(x <= xtest + pointRadius) &&
+		(y >= ytest - pointRadius) &&
+		(y <= ytest + pointRadius)
+}
+
+func (areaHandler) MouseEvent(a *ui.Area, me *ui.AreaMouseEvent) {
+	graphWidth, graphHeight := graphSize(me.AreaWidth, me.AreaHeight)
+	xs, ys := pointLocations(graphWidth, graphHeight)
+
+	currentPoint = -1
+	for i := 0; i < 10; i++ {
+		if inPoint(me.X, me.Y, xs[i], ys[i]) {
+			currentPoint = i
+			break
+		}
+	}
+
+	// TODO only redraw the relevant area
+	histogram.QueueRedrawAll()
+}
+
+func (areaHandler) MouseCrossed(a *ui.Area, left bool) {
+	// do nothing
+}
+
+func (areaHandler) DragBroken(a *ui.Area) {
+	// do nothing
+}
+
+func (areaHandler) KeyEvent(a *ui.Area, ke *ui.AreaKeyEvent) (handled bool) {
+	// reject all keys
+	return false
+}
+
+func setupUI() {
+	mainwin := ui.NewWindow("libui Histogram Example", 640, 480, true)
+	mainwin.SetMargined(true)
+	mainwin.OnClosing(func(*ui.Window) bool {
+		mainwin.Destroy()
+		ui.Quit()
+		return false
+	})
+	ui.OnShouldQuit(func() bool {
+		mainwin.Destroy()
+		return true
+	})
+
+	hbox := ui.NewHorizontalBox()
+	hbox.SetPadded(true)
+	mainwin.SetChild(hbox)
+
+	vbox := ui.NewVerticalBox()
+	vbox.SetPadded(true)
+	hbox.Append(vbox, false)
+
+	histogram = ui.NewArea(areaHandler{})
+
+	rand.Seed(time.Now().Unix())
+	for i := 0; i < 10; i++ {
+		datapoints[i] = ui.NewSpinbox(0, 100)
+		datapoints[i].SetValue(rand.Intn(101))
+		datapoints[i].OnChanged(func(*ui.Spinbox) {
+			histogram.QueueRedrawAll()
+		})
+		vbox.Append(datapoints[i], false)
+	}
+
+	colorButton = ui.NewColorButton()
+	// TODO inline these
+	brush := mkSolidBrush(colorDodgerBlue, 1.0)
+	colorButton.SetColor(brush.R,
+		brush.G,
+		brush.B,
+		brush.A)
+	colorButton.OnChanged(func(*ui.ColorButton) {
+		histogram.QueueRedrawAll()
+	})
+	vbox.Append(colorButton, false)
+
+	hbox.Append(histogram, true)
+
+	mainwin.Show()
+}
+
+func main() {
+	ui.Main(setupUI)
+}
diff --git a/examples/table.go b/examples/table.go
new file mode 100644
index 0000000..41cde9f
--- /dev/null
+++ b/examples/table.go
@@ -0,0 +1,450 @@
+// 26 august 2018
+
+// +build OMIT
+
+// TODO possible bugs in libui:
+// - the checkboxes on macOS retain their values when they shouldn't
+// - the table on GTK+ is very thin; the scrolled window needs hexpand=TRUE
+
+package main
+
+import (
+	"fmt"
+	"image"
+	_ "image/png"
+	"image/draw"
+	"bytes"
+
+	"github.com/andlabs/ui"
+)
+
+type modelHandler struct {
+	row9Text		string
+	yellowRow	int
+	checkStates	[15]int
+}
+
+func newModelHandler() *modelHandler {
+	m := new(modelHandler)
+	m.row9Text = "You can edit this one"
+	m.yellowRow = -1
+	return m
+}
+
+func (mh *modelHandler) ColumnTypes(m *ui.TableModel) []ui.TableValue {
+	return []ui.TableValue{
+		ui.TableString(""),		// column 0 text
+		ui.TableString(""),		// column 1 text
+		ui.TableString(""),		// column 2 text
+		ui.TableColor{},			// row background color
+		ui.TableColor{},			// column 1 text color
+		ui.TableImage{},		// column 1 image
+		ui.TableString(""),		// column 4 button text
+		ui.TableInt(0),			// column 3 checkbox state
+		ui.TableInt(0),			// column 5 progress
+	}
+}
+
+func (mh *modelHandler) NumRows(m *ui.TableModel) int {
+	return 15
+}
+
+var img [2]*ui.Image
+
+func (mh *modelHandler) CellValue(m *ui.TableModel, row, column int) ui.TableValue {
+	if column == 3 {
+		if row == mh.yellowRow {
+			return ui.TableColor{1, 1, 0, 1}
+		}
+		if row == 3 {
+			return ui.TableColor{1, 0, 0, 1}
+		}
+		if row == 11 {
+			return ui.TableColor{0, 0.5, 1, 0.5}
+		}
+		return nil
+	}
+	if column == 4 {
+		if (row % 2) == 1 {
+			return ui.TableColor{0.5, 0, 0.75, 1}
+		}
+		return nil
+	}
+	if column == 5 {
+		if row < 8 {
+			return ui.TableImage{img[0]}
+		}
+		return ui.TableImage{img[1]}
+	}
+	if column == 7 {
+		return ui.TableInt(mh.checkStates[row])
+	}
+	if column == 8 {
+		if row == 0 {
+			return ui.TableInt(0)
+		}
+		if row == 13 {
+			return ui.TableInt(100)
+		}
+		if row == 14 {
+			return ui.TableInt(-1)
+		}
+		return ui.TableInt(50)
+	}
+	switch column {
+	case 0:
+		return ui.TableString(fmt.Sprintf("Row %d", row))
+	case 2:
+		if row == 9 {
+			return ui.TableString(mh.row9Text)
+		}
+		return ui.TableString("Editing this won't change anything")
+	case 1:
+		return ui.TableString("Colors!")
+	case 6:
+		return ui.TableString("Make Yellow")
+	}
+	panic("unreachable")
+}
+
+func (mh *modelHandler) SetCellValue(m *ui.TableModel, row, column int, value ui.TableValue) {
+	if row == 9 && column == 2 {
+		mh.row9Text = string(value.(ui.TableString))
+	}
+	if column == 6 {		// row background color
+		prevYellowRow := mh.yellowRow
+		mh.yellowRow = row
+		if prevYellowRow != -1 {
+			m.RowChanged(prevYellowRow)
+		}
+		m.RowChanged(mh.yellowRow)
+	}
+	if column == 7 {		// checkboxes
+		mh.checkStates[row] = int(value.(ui.TableInt))
+	}
+}
+
+func appendImageNamed(i *ui.Image, which string) {
+	b := rawImages[which]
+	img, _, err := image.Decode(bytes.NewReader(b))
+	if err != nil {
+		panic(err)
+	}
+	nr, ok := img.(*image.RGBA)
+	if !ok {
+		i2 := image.NewRGBA(img.Bounds())
+		draw.Draw(i2, i2.Bounds(), img, img.Bounds().Min, draw.Src)
+		nr = i2
+	}
+	i.Append(nr)
+}
+
+func setupUI() {
+	mainwin := ui.NewWindow("libui Control Gallery", 640, 480, true)
+	mainwin.OnClosing(func(*ui.Window) bool {
+		ui.Quit()
+		return true
+	})
+	ui.OnShouldQuit(func() bool {
+		mainwin.Destroy()
+		return true
+	})
+
+	img[0] = ui.NewImage(16, 16)
+	appendImageNamed(img[0], "andlabs_16x16test_24june2016.png")
+	appendImageNamed(img[0], "andlabs_32x32test_24june2016.png")
+	img[1] = ui.NewImage(16, 16)
+	appendImageNamed(img[1], "tango-icon-theme-0.8.90_16x16_x-office-spreadsheet.png")
+	appendImageNamed(img[1], "tango-icon-theme-0.8.90_32x32_x-office-spreadsheet.png")
+
+	mh := newModelHandler()
+	model := ui.NewTableModel(mh)
+
+	table := ui.NewTable(&ui.TableParams{
+		Model:	model,
+		RowBackgroundColorModelColumn:	3,
+	})
+	mainwin.SetChild(table)
+	mainwin.SetMargined(true)
+
+	table.AppendTextColumn("Column 1",
+		0, ui.TableModelColumnNeverEditable, nil)
+
+	table.AppendImageTextColumn("Column 2",
+		5,
+		1, ui.TableModelColumnNeverEditable, &ui.TableTextColumnOptionalParams{
+			ColorModelColumn:		4,
+		});
+	table.AppendTextColumn("Editable",
+		2, ui.TableModelColumnAlwaysEditable, nil)
+
+	table.AppendCheckboxColumn("Checkboxes",
+		7, ui.TableModelColumnAlwaysEditable)
+	table.AppendButtonColumn("Buttons",
+		6, ui.TableModelColumnAlwaysEditable)
+
+	table.AppendProgressBarColumn("Progress Bar",
+		8)
+
+	mainwin.Show()
+}
+
+func main() {
+	ui.Main(setupUI)
+}
+
+var rawImages = map[string][]byte{
+	"andlabs_16x16test_24june2016.png": []byte{
+  0x89, 0x50, 0x4e, 0x47, 0x0d, 0x0a, 0x1a, 0x0a, 0x00, 0x00, 0x00, 0x0d,
+  0x49, 0x48, 0x44, 0x52, 0x00, 0x00, 0x00, 0x10, 0x00, 0x00, 0x00, 0x10,
+  0x08, 0x06, 0x00, 0x00, 0x00, 0x1f, 0xf3, 0xff, 0x61, 0x00, 0x00, 0x00,
+  0x01, 0x73, 0x52, 0x47, 0x42, 0x00, 0xae, 0xce, 0x1c, 0xe9, 0x00, 0x00,
+  0x00, 0xca, 0x49, 0x44, 0x41, 0x54, 0x38, 0x11, 0xa5, 0x93, 0xb1, 0x0d,
+  0xc2, 0x40, 0x0c, 0x45, 0x1d, 0xc4, 0x14, 0x0c, 0x12, 0x41, 0x0f, 0x62,
+  0x12, 0x46, 0x80, 0x8a, 0x2e, 0x15, 0x30, 0x02, 0x93, 0x20, 0x68, 0x11,
+  0x51, 0x06, 0x61, 0x0d, 0x88, 0x2d, 0x7f, 0xdb, 0x07, 0x87, 0x08, 0xdc,
+  0x49, 0x91, 0x7d, 0xf6, 0xf7, 0xf3, 0x4f, 0xa4, 0x54, 0xbb, 0xeb, 0xf6,
+  0x41, 0x05, 0x67, 0xcc, 0xb3, 0x9b, 0xfa, 0xf6, 0x17, 0x62, 0xdf, 0xcd,
+  0x48, 0x00, 0x32, 0xbd, 0xa8, 0x1d, 0x72, 0xee, 0x3c, 0x47, 0x16, 0xfb,
+  0x5c, 0x53, 0x8d, 0x03, 0x30, 0x14, 0x84, 0xf7, 0xd5, 0x89, 0x26, 0xc7,
+  0x25, 0x10, 0x36, 0xe4, 0x05, 0xa2, 0x51, 0xbc, 0xc4, 0x1c, 0xc3, 0x1c,
+  0xed, 0x30, 0x1c, 0x8f, 0x16, 0x3f, 0x02, 0x78, 0x33, 0x20, 0x06, 0x60,
+  0x97, 0x70, 0xaa, 0x45, 0x7f, 0x85, 0x60, 0x5d, 0xb6, 0xf4, 0xc2, 0xc4,
+  0x3e, 0x0f, 0x44, 0xcd, 0x1b, 0x20, 0x90, 0x0f, 0xed, 0x85, 0xa8, 0x55,
+  0x05, 0x42, 0x43, 0xb4, 0x9e, 0xce, 0x71, 0xb3, 0xe8, 0x0e, 0xb4, 0xc4,
+  0xc3, 0x39, 0x21, 0xb7, 0x73, 0xbd, 0xe4, 0x1b, 0xe4, 0x04, 0xb6, 0xaa,
+  0x4f, 0x18, 0x2c, 0xee, 0x42, 0x31, 0x01, 0x84, 0xfa, 0xe0, 0xd4, 0x00,
+  0xdf, 0xb6, 0x83, 0xf8, 0xea, 0xc2, 0x00, 0x10, 0xfc, 0x1a, 0x05, 0x30,
+  0x74, 0x3b, 0xe0, 0xd1, 0x45, 0xb1, 0x83, 0xaa, 0xf4, 0x77, 0x7e, 0x02,
+  0x87, 0x1f, 0x42, 0x7f, 0x9e, 0x2b, 0xe8, 0xdf, 0x00, 0x00, 0x00, 0x00,
+  0x49, 0x45, 0x4e, 0x44, 0xae, 0x42, 0x60, 0x82,
+},
+	"andlabs_32x32test_24june2016.png": []byte{
+  0x89, 0x50, 0x4e, 0x47, 0x0d, 0x0a, 0x1a, 0x0a, 0x00, 0x00, 0x00, 0x0d,
+  0x49, 0x48, 0x44, 0x52, 0x00, 0x00, 0x00, 0x20, 0x00, 0x00, 0x00, 0x20,
+  0x08, 0x06, 0x00, 0x00, 0x00, 0x73, 0x7a, 0x7a, 0xf4, 0x00, 0x00, 0x00,
+  0x01, 0x73, 0x52, 0x47, 0x42, 0x00, 0xae, 0xce, 0x1c, 0xe9, 0x00, 0x00,
+  0x01, 0x6a, 0x49, 0x44, 0x41, 0x54, 0x58, 0x09, 0xc5, 0x97, 0xc1, 0x0d,
+  0xc2, 0x30, 0x0c, 0x45, 0x03, 0x62, 0x0a, 0x06, 0x41, 0x70, 0x07, 0x31,
+  0x09, 0x23, 0xc0, 0x89, 0x05, 0x80, 0x11, 0x98, 0x04, 0xc1, 0x15, 0x81,
+  0x18, 0x84, 0x35, 0x00, 0x57, 0xfd, 0x8d, 0x13, 0x92, 0x3a, 0x4e, 0x03,
+  0x8d, 0x54, 0x39, 0x35, 0xb1, 0xff, 0x8b, 0xed, 0x1e, 0x18, 0xec, 0xae,
+  0xdb, 0x97, 0xe9, 0x71, 0x8d, 0x48, 0x7b, 0x33, 0xb9, 0xf5, 0x82, 0xb0,
+  0x7f, 0xcc, 0x4c, 0x05, 0x50, 0xa9, 0x2f, 0x26, 0x32, 0xc4, 0xf9, 0x21,
+  0x9f, 0xa1, 0x13, 0x8a, 0x5c, 0x16, 0x40, 0x4a, 0x9e, 0x92, 0x14, 0x78,
+  0x8a, 0x5c, 0x43, 0xc4, 0xf4, 0x65, 0x3b, 0x01, 0x3c, 0x57, 0x27, 0x43,
+  0x4f, 0x97, 0x95, 0x0d, 0x40, 0xc2, 0xe3, 0xe3, 0xb2, 0x7a, 0xba, 0x40,
+  0xd8, 0x19, 0x50, 0x5c, 0x03, 0xe2, 0x08, 0x21, 0x10, 0xdf, 0xd7, 0x3a,
+  0x88, 0x6c, 0x46, 0xd4, 0x00, 0x5f, 0x42, 0x35, 0x85, 0x03, 0x41, 0x03,
+  0xcb, 0x44, 0x00, 0x1a, 0xb2, 0x2e, 0x80, 0x66, 0xd2, 0x43, 0xd9, 0x32,
+  0x7c, 0x2e, 0x40, 0x1b, 0x75, 0x0d, 0xe7, 0xdc, 0x94, 0x09, 0xc6, 0x2a,
+  0xc3, 0x8e, 0x04, 0xb7, 0x59, 0x43, 0x08, 0x08, 0x64, 0xcc, 0x15, 0xa7,
+  0x78, 0x5b, 0x01, 0x45, 0xdf, 0x28, 0x90, 0x43, 0xd0, 0x3e, 0x77, 0x59,
+  0x80, 0x8c, 0x0c, 0x5d, 0x84, 0x21, 0xe7, 0x02, 0x94, 0x1c, 0x42, 0x29,
+  0x57, 0x3d, 0x6f, 0x16, 0xa0, 0x6d, 0x00, 0x81, 0xcb, 0xec, 0xe1, 0x7e,
+  0x61, 0x6f, 0xc6, 0xac, 0xa7, 0x73, 0xfb, 0xae, 0xc8, 0x65, 0x01, 0x6c,
+  0xb8, 0xb8, 0x23, 0x71, 0x47, 0xf0, 0x13, 0x11, 0xf2, 0x89, 0x89, 0x3e,
+  0x07, 0xd4, 0x5f, 0x41, 0x4c, 0x88, 0x80, 0xfc, 0xaa, 0x14, 0x07, 0x88,
+  0x89, 0x43, 0x28, 0x07, 0x42, 0x5d, 0x01, 0x88, 0x95, 0xb2, 0xc9, 0x00,
+  0xd2, 0xed, 0x01, 0xa4, 0xad, 0x82, 0x38, 0x84, 0xe8, 0xab, 0x3f, 0x74,
+  0x10, 0x0c, 0x59, 0x0e, 0x21, 0xc5, 0xb5, 0x02, 0xa4, 0xde, 0x3a, 0x06,
+  0x41, 0x7e, 0x29, 0x47, 0x72, 0x0b, 0x42, 0x22, 0x25, 0x7c, 0x51, 0x00,
+  0x89, 0x3c, 0x55, 0x9c, 0xb7, 0x23, 0x14, 0xf3, 0xd5, 0x82, 0x9c, 0x9e,
+  0x87, 0x12, 0x73, 0x1f, 0x87, 0xf0, 0x67, 0xc2, 0x01, 0x28, 0x75, 0x6b,
+  0x2e, 0x8e, 0x3d, 0x84, 0x7d, 0x8d, 0x68, 0x0b, 0x10, 0xf8, 0x6b, 0xdb,
+  0x00, 0xf8, 0x64, 0xbf, 0x12, 0xe6, 0xed, 0x20, 0x8d, 0x0a, 0xe0, 0x5f,
+  0xe2, 0xb8, 0x14, 0x87, 0x68, 0x2a, 0x80, 0x1f, 0xff, 0x6d, 0x07, 0x7d,
+  0xff, 0x3d, 0x7f, 0x03, 0x93, 0xca, 0x91, 0xa9, 0x89, 0x2a, 0x2e, 0xd2,
+  0x00, 0x00, 0x00, 0x00, 0x49, 0x45, 0x4e, 0x44, 0xae, 0x42, 0x60, 0x82,
+},
+	"tango-icon-theme-0.8.90_16x16_x-office-spreadsheet.png": []byte{
+  0x89, 0x50, 0x4e, 0x47, 0x0d, 0x0a, 0x1a, 0x0a, 0x00, 0x00, 0x00, 0x0d,
+  0x49, 0x48, 0x44, 0x52, 0x00, 0x00, 0x00, 0x10, 0x00, 0x00, 0x00, 0x10,
+  0x08, 0x06, 0x00, 0x00, 0x00, 0x1f, 0xf3, 0xff, 0x61, 0x00, 0x00, 0x00,
+  0x06, 0x62, 0x4b, 0x47, 0x44, 0x00, 0xff, 0x00, 0xff, 0x00, 0xff, 0xa0,
+  0xbd, 0xa7, 0x93, 0x00, 0x00, 0x00, 0x09, 0x70, 0x48, 0x59, 0x73, 0x00,
+  0x00, 0x0b, 0x13, 0x00, 0x00, 0x0b, 0x13, 0x01, 0x00, 0x9a, 0x9c, 0x18,
+  0x00, 0x00, 0x00, 0x07, 0x74, 0x49, 0x4d, 0x45, 0x07, 0xd5, 0x04, 0x16,
+  0x14, 0x0d, 0x09, 0xd9, 0x88, 0x44, 0xfa, 0x00, 0x00, 0x02, 0x4d, 0x49,
+  0x44, 0x41, 0x54, 0x38, 0xcb, 0x95, 0x92, 0xdf, 0x4b, 0x53, 0x61, 0x18,
+  0xc7, 0x3f, 0x67, 0x9b, 0x6e, 0x7a, 0xd6, 0xfc, 0x55, 0xe0, 0x59, 0x8a,
+  0x95, 0x71, 0x08, 0x52, 0x21, 0x91, 0x2c, 0x8a, 0x0a, 0x94, 0x11, 0x14,
+  0x78, 0x21, 0x99, 0x14, 0x81, 0xdd, 0x48, 0x7f, 0x45, 0x63, 0x5d, 0x75,
+  0x1b, 0x34, 0xd0, 0x9b, 0x52, 0x83, 0x0a, 0xad, 0x0b, 0x43, 0x72, 0xd0,
+  0x85, 0x14, 0x14, 0x68, 0x77, 0x39, 0xcd, 0x6c, 0x94, 0x0c, 0xf4, 0x48,
+  0x4d, 0x5b, 0x5b, 0x4b, 0xcf, 0x39, 0x3b, 0xef, 0xe9, 0x62, 0x3f, 0xec,
+  0xd7, 0x2e, 0x7c, 0xae, 0xbe, 0x2f, 0xef, 0xf3, 0xfd, 0xbc, 0xdf, 0xf7,
+  0x7d, 0x5e, 0x69, 0x78, 0x78, 0xf8, 0xc9, 0xfa, 0xfa, 0x7a, 0x2f, 0xbb,
+  0xab, 0xcb, 0xc1, 0x60, 0x70, 0x1c, 0x80, 0x50, 0x28, 0x64, 0xef, 0xb6,
+  0x42, 0xa1, 0x90, 0x5d, 0x20, 0xb9, 0x0a, 0x22, 0x12, 0x89, 0xe4, 0x95,
+  0x84, 0xa6, 0x69, 0xf8, 0xfd, 0x0a, 0x00, 0x9a, 0xa6, 0xa1, 0x28, 0xfe,
+  0xbc, 0x5e, 0x63, 0x60, 0x60, 0xe0, 0x8f, 0x28, 0x45, 0x80, 0xa6, 0x69,
+  0x48, 0x52, 0x0e, 0x20, 0x49, 0xb9, 0xf5, 0xce, 0xde, 0x5a, 0xc9, 0xbb,
+  0x14, 0x01, 0x8a, 0x5f, 0xc1, 0x2b, 0x7b, 0x01, 0x88, 0xc5, 0x62, 0xf4,
+  0xf4, 0xf4, 0x00, 0x10, 0x8d, 0x46, 0x69, 0x69, 0x6d, 0x41, 0xb2, 0x25,
+  0xe6, 0xa3, 0xf3, 0xa5, 0x01, 0x86, 0x6e, 0x90, 0x21, 0x83, 0x84, 0x04,
+  0x40, 0x2a, 0x95, 0x22, 0x2f, 0x49, 0x7f, 0x4f, 0x91, 0x8f, 0x57, 0x1a,
+  0xe0, 0x71, 0xbb, 0x91, 0xbd, 0x5e, 0x0a, 0xaf, 0xe3, 0xf3, 0x55, 0x15,
+  0xfc, 0xf8, 0xaa, 0x76, 0x74, 0x49, 0xc0, 0xb6, 0xae, 0xe7, 0x4f, 0xcc,
+  0xb5, 0x7e, 0x8c, 0x3c, 0x67, 0xf5, 0xee, 0x1d, 0xb6, 0x16, 0x16, 0x89,
+  0xa7, 0x33, 0xb9, 0x26, 0xb9, 0x82, 0xc9, 0xb6, 0x56, 0xbc, 0x6d, 0xed,
+  0xff, 0x49, 0xe0, 0xf1, 0x20, 0xcb, 0x32, 0x00, 0xf6, 0xe8, 0x3d, 0x3e,
+  0xcd, 0xcd, 0xd1, 0x74, 0xe5, 0x22, 0x65, 0x9d, 0x2a, 0xc2, 0x21, 0x91,
+  0x15, 0x02, 0xc3, 0x14, 0x48, 0x0e, 0x0f, 0x4d, 0xcf, 0xa6, 0x78, 0x74,
+  0xbc, 0xe3, 0x65, 0xff, 0xec, 0xdb, 0xfe, 0x22, 0x40, 0xd7, 0x75, 0x00,
+  0x36, 0x1e, 0x8c, 0x51, 0xb3, 0xb2, 0x4c, 0xc3, 0x8d, 0x3e, 0xb2, 0xe9,
+  0x24, 0xc9, 0xf8, 0x2a, 0xa6, 0x10, 0x18, 0x96, 0x8d, 0xb3, 0xaa, 0x16,
+  0x53, 0x08, 0xac, 0x4e, 0x15, 0xe7, 0xd2, 0xea, 0x99, 0x11, 0xf5, 0xf0,
+  0xed, 0x22, 0xc0, 0xed, 0x76, 0x23, 0xcb, 0x32, 0x89, 0xc8, 0x34, 0xfb,
+  0xaf, 0x9e, 0xe7, 0x47, 0x3c, 0x56, 0x34, 0x9a, 0x42, 0xf0, 0xa1, 0xfe,
+  0x10, 0x9b, 0x86, 0x0b, 0x53, 0x64, 0x31, 0x24, 0x0b, 0xef, 0xb1, 0x7a,
+  0xd4, 0xa7, 0x93, 0x7d, 0xff, 0x24, 0xb0, 0x37, 0xbf, 0x61, 0x19, 0x5b,
+  0xe8, 0xd6, 0x8e, 0x59, 0x52, 0xca, 0xd9, 0xd3, 0xe1, 0x26, 0xfc, 0xb5,
+  0x0b, 0xc3, 0xd4, 0x51, 0x6b, 0xbd, 0x08, 0xcb, 0xe4, 0xe8, 0xe8, 0x43,
+  0x8f, 0xe3, 0xef, 0x04, 0x66, 0x75, 0x0d, 0xce, 0x7d, 0x0d, 0xe0, 0xab,
+  0x41, 0x17, 0x16, 0xba, 0x25, 0x70, 0xaa, 0x95, 0x34, 0x37, 0xa7, 0xa9,
+  0xcf, 0xae, 0x71, 0xb2, 0x71, 0x2f, 0x5f, 0x52, 0x29, 0x7c, 0x2b, 0xef,
+  0xc9, 0x78, 0x3c, 0xdb, 0xc5, 0x04, 0x81, 0x40, 0x20, 0x37, 0x8d, 0xc1,
+  0x41, 0xde, 0xdd, 0x1f, 0xe3, 0xe0, 0xf5, 0x5e, 0xea, 0x0e, 0x1c, 0xc1,
+  0x76, 0xb9, 0xa8, 0x3e, 0x5d, 0x87, 0xa8, 0x70, 0x10, 0xec, 0x90, 0x78,
+  0xfc, 0x39, 0x4d, 0x63, 0x7c, 0x91, 0xf6, 0xc9, 0x09, 0x2a, 0x55, 0x75,
+  0x5c, 0x0a, 0x87, 0xc3, 0x53, 0x89, 0x44, 0xe2, 0xc2, 0xef, 0xb3, 0xad,
+  0x9d, 0x99, 0x41, 0x7e, 0xf3, 0x1a, 0xf3, 0xdc, 0x09, 0xca, 0x1a, 0xaa,
+  0xf1, 0x9c, 0xb5, 0xd1, 0x0d, 0x41, 0x66, 0xc3, 0x64, 0x7a, 0x4a, 0xd0,
+  0x33, 0xfb, 0x8a, 0x0a, 0x55, 0x7d, 0x71, 0x6d, 0x61, 0x21, 0x50, 0xea,
+  0x7f, 0x30, 0xd2, 0xdd, 0x7d, 0x49, 0x5f, 0x5a, 0xba, 0xe9, 0x4e, 0x26,
+  0x55, 0xe7, 0xcf, 0x4c, 0xb9, 0x6d, 0x83, 0x90, 0x65, 0xc3, 0xa5, 0x28,
+  0xcb, 0x07, 0xbb, 0xba, 0x6e, 0x9d, 0x1a, 0x1a, 0x9a, 0x00, 0xf8, 0x05,
+  0xf4, 0xf5, 0x23, 0xe9, 0x30, 0xeb, 0x2d, 0xf9, 0x00, 0x00, 0x00, 0x00,
+  0x49, 0x45, 0x4e, 0x44, 0xae, 0x42, 0x60, 0x82,
+},
+	"tango-icon-theme-0.8.90_32x32_x-office-spreadsheet.png": []byte{
+  0x89, 0x50, 0x4e, 0x47, 0x0d, 0x0a, 0x1a, 0x0a, 0x00, 0x00, 0x00, 0x0d,
+  0x49, 0x48, 0x44, 0x52, 0x00, 0x00, 0x00, 0x20, 0x00, 0x00, 0x00, 0x20,
+  0x08, 0x06, 0x00, 0x00, 0x00, 0x73, 0x7a, 0x7a, 0xf4, 0x00, 0x00, 0x00,
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+  0x98, 0x64, 0x1e, 0x77, 0xb2, 0x47, 0x00, 0x00, 0x00, 0x00, 0x49, 0x45,
+  0x4e, 0x44, 0xae, 0x42, 0x60, 0x82,
+},
+}