Add icons example

examples/clock/main.go

@@ -0,0 +1,126 @@
+// Example clock demonstrates the use of goroutines and tomo.Do() to provide
+// live-updating information.
+package main
+
+import "time"
+import "math"
+import "image"
+import "image/color"
+import "git.tebibyte.media/tomo/tomo"
+import "git.tebibyte.media/tomo/nasin"
+import "git.tebibyte.media/tomo/objects"
+import "git.tebibyte.media/tomo/tomo/theme"
+import "git.tebibyte.media/tomo/tomo/canvas"
+import "git.tebibyte.media/tomo/objects/layouts"
+
+type Application struct {
+	clockFace *ClockFace
+	timeLabel *objects.Label
+}
+
+func (this *Application) Describe () nasin.ApplicationDescription {
+	return nasin.ApplicationDescription {
+		Name: "Clock",
+		ID:   "xyz.holanet.TomoClockExample",
+	}
+}
+
+func (this *Application) Init () error {
+	window, err := nasin.NewApplicationWindow(this, image.Rect(0, 0, 128, 160))
+	if err != nil { return err }
+
+	this.clockFace = NewClockFace()
+	this.timeLabel = objects.NewLabel("")
+	this.timeLabel.SetAlign(tomo.AlignMiddle, tomo.AlignMiddle)
+	container := objects.NewOuterContainer (
+		layouts.NewGrid([]bool { true }, []bool { true, false }),
+		this.clockFace,
+		this.timeLabel)
+	window.SetRoot(container)
+
+	go func () {
+		for {
+			tomo.Do(this.updateTime)
+			time.Sleep(time.Second)
+		}
+	} ()
+
+	window.OnClose(tomo.Stop)
+	window.Show()
+	return nil
+}
+
+func (this *Application) updateTime () {
+	now := time.Now()
+	this.clockFace.SetTime(now)
+	this.timeLabel.SetText(now.Format(time.DateTime))
+}
+
+func main () {
+	nasin.RunApplication(&Application { })
+}
+
+type ClockFace struct {
+	tomo.CanvasBox
+	time time.Time
+}
+
+func NewClockFace () *ClockFace {
+	box := &ClockFace {
+		CanvasBox: tomo.NewCanvasBox(),
+	}
+	theme.Apply(box, theme.R("nasin", "ClockFace", ""))
+	box.SetDrawer(box)
+	return box
+}
+
+// TODO move ClockFace to objects
+
+func (this *ClockFace) SetTime (when time.Time) {
+	this.time = when
+	this.Invalidate()
+}
+
+func (this *ClockFace) Draw (destination canvas.Canvas) {
+	pen := destination.Pen()
+	pen.Fill(color.Transparent)
+	pen.Rectangle(destination.Bounds())
+
+	for hour := 0; hour < 12; hour ++ {
+		radialLine (
+			destination,
+			theme.ColorForeground,
+			0.8, 0.9, float64(hour) / 6 * math.Pi)
+	}
+
+	second := float64(this.time.Second())
+	minute := float64(this.time.Minute()) + second / 60
+	hour   := float64(this.time.Hour())   + minute / 60
+
+	radialLine(destination, theme.ColorForeground, 0, 0.5, (hour   - 3)  / 6  * math.Pi)
+	radialLine(destination, theme.ColorForeground, 0, 0.7, (minute - 15) / 30 * math.Pi)
+	radialLine(destination, theme.ColorAccent,     0, 0.7, (second - 15) / 30 * math.Pi)
+}
+
+func radialLine (
+	destination canvas.Canvas,
+	source color.Color,
+	inner  float64,
+	outer  float64,
+	theta  float64,
+) {
+	pen := destination.Pen()
+	bounds := destination.Bounds()
+	width  := float64(bounds.Dx()) / 2
+	height := float64(bounds.Dy()) / 2
+	min := bounds.Min.Add(image.Pt (
+		int(math.Cos(theta) * inner * width + width),
+		int(math.Sin(theta) * inner * height + height)))
+	max := bounds.Min.Add(image.Pt (
+		int(math.Cos(theta) * outer * width + width),
+		int(math.Sin(theta) * outer * height + height)))
+	
+	pen.Stroke(source)
+	pen.StrokeWeight(1)
+	pen.Path(min, max)
+}

examples/icons/main.go

@@ -0,0 +1,190 @@
+// Example icons demonstrates the use of icons, and buttons with icons.
+package main
+
+import "image"
+import "git.tebibyte.media/tomo/tomo"
+import "git.tebibyte.media/tomo/nasin"
+import "git.tebibyte.media/tomo/objects"
+import "git.tebibyte.media/tomo/tomo/theme"
+import "git.tebibyte.media/tomo/objects/layouts"
+
+type Application struct {
+	size theme.IconSize
+	grid tomo.ContainerBox
+}
+
+func (this *Application) Describe () nasin.ApplicationDescription {
+	return nasin.ApplicationDescription {
+		Name: "Tomo Icon Example",
+		ID:   "xyz.holanet.TomoIconExample",
+	}
+}
+
+func (this *Application) Init () error {
+	window, err := nasin.NewApplicationWindow(this, image.Rect(0, 0, 128, 128))
+	if err != nil { return err }
+
+	this.grid = objects.NewInnerContainer (
+		layouts.NewGrid([]bool {
+				false, false, false, false, false, false, false, false, false, false, false, false,
+			}, []bool { }),
+	)
+	this.resizeIcons(theme.IconSizeSmall)
+	
+	iconButtons := objects.NewInnerContainer(layouts.NewGrid([]bool { true, true, true}, []bool { false }))
+
+	button := objects.NewButton("small")
+	button.SetIcon(theme.IconActionZoomOut)
+	button.OnClick(func () { this.resizeIcons(theme.IconSizeSmall) })
+	iconButtons.Add(button)
+	
+	button = objects.NewButton("medium")
+	button.SetIcon(theme.IconActionZoomReset)
+	button.OnClick(func () { this.resizeIcons(theme.IconSizeMedium) })
+	iconButtons.Add(button)
+	
+	button = objects.NewButton("large")
+	button.SetIcon(theme.IconActionZoomIn)
+	button.OnClick(func () { this.resizeIcons(theme.IconSizeLarge) })
+	iconButtons.Add(button)
+	
+	container := objects.NewOuterContainer (
+		layouts.NewGrid([]bool { true }, []bool { false, true, false }),
+		objects.NewLabel("A smorgasbord of icons:"),
+		this.grid,
+		iconButtons)
+	window.SetRoot(container)
+
+	window.OnClose(tomo.Stop)
+	window.Show()
+	return nil
+}
+
+func (this *Application) resizeIcons (size theme.IconSize) {
+	this.size = size
+	this.grid.Clear()
+	icons := []theme.Icon {
+		theme.IconUnknown,
+		theme.IconFile,
+		theme.IconDirectory,
+		theme.IconStorage,
+		theme.IconApplication,
+		theme.IconNetwork,
+		theme.IconDevice,
+		theme.IconPeripheral,
+		theme.IconPort,
+		theme.IconActionOpen,
+		theme.IconActionOpenIn,
+		theme.IconActionSave,
+		theme.IconActionSaveAs,
+		theme.IconActionPrint,
+		theme.IconActionNew,
+		theme.IconActionNewDirectory,
+		theme.IconActionDelete,
+		theme.IconActionRename,
+		theme.IconActionGetInformation,
+		theme.IconActionChangePermissions,
+		theme.IconActionRevert,
+		theme.IconActionAdd,
+		theme.IconActionRemove,
+		theme.IconActionAddBookmark,
+		theme.IconActionRemoveBookmark,
+		theme.IconActionAddFavorite,
+		theme.IconActionRemoveFavorite,
+		theme.IconActionPlay,
+		theme.IconActionPause,
+		theme.IconActionStop,
+		theme.IconActionFastForward,
+		theme.IconActionRewind,
+		theme.IconActionToBeginning,
+		theme.IconActionToEnd,
+		theme.IconActionRecord,
+		theme.IconActionVolumeUp,
+		theme.IconActionVolumeDown,
+		theme.IconActionMute,
+		theme.IconActionUndo,
+		theme.IconActionRedo,
+		theme.IconActionCut,
+		theme.IconActionCopy,
+		theme.IconActionPaste,
+		theme.IconActionFind,
+		theme.IconActionReplace,
+		theme.IconActionSelectAll,
+		theme.IconActionSelectNone,
+		theme.IconActionIncrement,
+		theme.IconActionDecrement,
+		theme.IconActionClose,
+		theme.IconActionQuit,
+		theme.IconActionIconify,
+		theme.IconActionShade,
+		theme.IconActionMaximize,
+		theme.IconActionFullScreen,
+		theme.IconActionRestore,
+		theme.IconActionExpand,
+		theme.IconActionContract,
+		theme.IconActionBack,
+		theme.IconActionForward,
+		theme.IconActionUp,
+		theme.IconActionDown,
+		theme.IconActionReload,
+		theme.IconActionZoomIn,
+		theme.IconActionZoomOut,
+		theme.IconActionZoomReset,
+		theme.IconActionMove,
+		theme.IconActionResize,
+		theme.IconActionGoTo,
+		theme.IconActionTransform,
+		theme.IconActionTranslate,
+		theme.IconActionRotate,
+		theme.IconActionScale,
+		theme.IconActionWarp,
+		theme.IconActionCornerPin,
+		theme.IconActionSelectRectangle,
+		theme.IconActionSelectEllipse,
+		theme.IconActionSelectLasso,
+		theme.IconActionSelectGeometric,
+		theme.IconActionSelectAuto,
+		theme.IconActionCrop,
+		theme.IconActionFill,
+		theme.IconActionGradient,
+		theme.IconActionPencil,
+		theme.IconActionBrush,
+		theme.IconActionEraser,
+		theme.IconActionText,
+		theme.IconActionEyedropper,
+		theme.IconStatusInformation,
+		theme.IconStatusQuestion,
+		theme.IconStatusWarning,
+		theme.IconStatusError,
+		theme.IconStatusCancel,
+		theme.IconStatusOkay,
+		theme.IconStatusCellSignal0,
+		theme.IconStatusCellSignal1,
+		theme.IconStatusCellSignal2,
+		theme.IconStatusCellSignal3,
+		theme.IconStatusWirelessSignal0,
+		theme.IconStatusWirelessSignal1,
+		theme.IconStatusWirelessSignal2,
+		theme.IconStatusWirelessSignal3,
+		theme.IconStatusBattery0,
+		theme.IconStatusBattery1,
+		theme.IconStatusBattery2,
+		theme.IconStatusBattery3,
+		theme.IconStatusBrightness0,
+		theme.IconStatusBrightness1,
+		theme.IconStatusBrightness2,
+		theme.IconStatusBrightness3,
+		theme.IconStatusVolume0,
+		theme.IconStatusVolume1,
+		theme.IconStatusVolume2,
+		theme.IconStatusVolume3,
+	}
+
+	for _, icon := range icons {
+		this.grid.Add(objects.NewIcon(icon, size))
+	}
+}
+
+func main () {
+	nasin.RunApplication(&Application { })
+}