Add godoc badge to readme

README.md

@@ -1,4 +1,6 @@
 # objects
 
+[![Go Reference](https://pkg.go.dev/badge/pkg.go.dev/git.tebibyte.media/tomo/objects.svg)](https://pkg.go.dev/pkg.go.dev/git.tebibyte.media/tomo/objects)
+
 Objects contains a standard collection of re-usable objects. All objects in this
 module visually conform to whatever the theme is set to.

go.mod

@@ -2,6 +2,6 @@ module git.tebibyte.media/tomo/objects
 
 go 1.20
 
-require git.tebibyte.media/tomo/tomo v0.26.1
+require git.tebibyte.media/tomo/tomo v0.27.0
 
 require golang.org/x/image v0.11.0 // indirect

go.sum

@@ -1,5 +1,5 @@
-git.tebibyte.media/tomo/tomo v0.26.1 h1:V5ciRuixMYb79aAawgquFEfJ1icyEmMKBKFPWwi94NE=
-git.tebibyte.media/tomo/tomo v0.26.1/go.mod h1:C9EzepS9wjkTJjnZaPBh22YvVPyA4hbBAJVU20Rdmps=
+git.tebibyte.media/tomo/tomo v0.27.0 h1:gCwxQe0qm1hZLfHkMI3OccNMC/lB1cfs4BbaMz/bXug=
+git.tebibyte.media/tomo/tomo v0.27.0/go.mod h1:C9EzepS9wjkTJjnZaPBh22YvVPyA4hbBAJVU20Rdmps=
 github.com/yuin/goldmark v1.4.13/go.mod h1:6yULJ656Px+3vBD8DxQVa3kxgyrAnzto9xy5taEt/CY=
 golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
 golang.org/x/crypto v0.0.0-20210921155107-089bfa567519/go.mod h1:GvvjBRRGRdwPK5ydBHafDWAxML/pGHZbMvKqRZ5+Abc=

icon.go

@@ -0,0 +1,47 @@
+package objects
+
+import "git.tebibyte.media/tomo/tomo"
+import "git.tebibyte.media/tomo/tomo/data"
+import "git.tebibyte.media/tomo/tomo/theme"
+import "git.tebibyte.media/tomo/tomo/canvas"
+
+// Icon displays a single icon.
+type Icon struct {
+	tomo.Box
+}
+
+// NewIcon creates a new icon from an icon ID.
+func NewIcon (id theme.Icon, size theme.IconSize) *Icon {
+	this := &Icon {
+		Box: tomo.NewBox(),
+	}
+	theme.Apply(this, theme.R("objects", "Icon", size.String()))
+	this.SetTexture(id.Texture(size))
+	return this
+}
+
+// NewMimeIcon creates a new icon from a MIME type.
+func NewMimeIcon (mime data.Mime, size theme.IconSize) *Icon {
+	this := &Icon {
+		Box: tomo.NewBox(),
+	}
+	theme.Apply(this, theme.R("objects", "Icon", size.String()))
+	this.SetTexture(theme.MimeIcon(mime, size))
+	return this
+}
+
+// NewApplicationIcon creates a new icon from an application description.
+func NewApplicationIcon (id theme.ApplicationIcon, size theme.IconSize) *Icon {
+	this := &Icon {
+		Box: tomo.NewBox(),
+	}
+	theme.Apply(this, theme.R("objects", "Icon", size.String()))
+	this.SetTexture(id.Texture(size))
+	return this
+}
+
+func (this *Icon) SetTexture (texture canvas.Texture) {
+	bounds := texture.Bounds()
+	this.Box.SetTexture(texture)
+	this.SetMinimumSize(bounds.Max.Sub(bounds.Min))
+}

separator.go

@@ -16,4 +16,3 @@ func NewSeparator () *Separator {
 	theme.Apply(this, theme.R("objects", "Separator", ""))
 	return this
 }
-

slider.go

@@ -14,7 +14,7 @@ type Slider struct {
 	layout     sliderLayout
 	dragging   bool
 	dragOffset image.Point
-	
+
 	on struct {
 		valueChange event.FuncBroadcaster
 	}
@@ -34,7 +34,7 @@ func newSlider (orient string, value float64) *Slider {
 			vertical: orient == "vertical",
 		},
 	}
-	
+
 	this.Add(this.handle)
 	this.SetFocusable(true)
 	this.SetPropagateEvents(false)
@@ -74,18 +74,24 @@ func (this *Slider) OnValueChange (callback func ()) event.Cookie {
 }
 
 func (this *Slider) handleKeyDown (key input.Key, numpad bool) {
+	var increment float64; if this.layout.vertical {
+		increment = -0.05
+	} else {
+		increment = 0.05
+	}
+
 	switch key {
 	case input.KeyUp, input.KeyLeft:
 		if this.Modifiers().Alt {
 			this.SetValue(0)
 		} else {
-			this.SetValue(this.Value() - 0.05)		
+			this.SetValue(this.Value() - increment)
 		}
 	case input.KeyDown, input.KeyRight:
 		if this.Modifiers().Alt {
 			this.SetValue(1)
 		} else {
-			this.SetValue(this.Value() + 0.05)		
+			this.SetValue(this.Value() + increment)
 		}
 	case input.KeyHome:
 		this.SetValue(0)
@@ -98,7 +104,7 @@ func (this *Slider) handleMouseDown (button input.Button) {
 	pointer := this.MousePosition()
 	handle  := this.handle.Bounds()
 	var above, within bool
-	
+
 	if pointer.In(handle) {
 		within = true
 	} else if this.layout.vertical {
@@ -106,7 +112,7 @@ func (this *Slider) handleMouseDown (button input.Button) {
 	} else {
 		above = pointer.X < handle.Min.X
 	}
-	
+
 	switch button {
 	case input.ButtonLeft:
 		if within {
@@ -152,6 +158,7 @@ func (this *Slider) drag () {
 
 	if this.layout.vertical {
 		this.SetValue (
+			1 -
 			float64(pointer.Y) /
 			float64(gutter.Dy() - handle.Dy()))
 	} else {
@@ -185,10 +192,10 @@ func (this sliderLayout) Arrange (hints tomo.LayoutHints, boxes []tomo.Box) {
 	if len(boxes) != 1 { return }
 	handle := image.Rectangle { Max: boxes[0].MinimumSize() }
 	gutter := hints.Bounds
-	
+
 	if this.vertical {
 		height := gutter.Dy() - handle.Dy()
-		offset := int(float64(height) * this.value)
+		offset := int(float64(height) * (1 - this.value))
 		handle.Max.X = gutter.Dx()
 		boxes[0].SetBounds (
 			handle.