diff --git a/elements/core/core.go b/elements/core/core.go
deleted file mode 100644
index 9811f14..0000000
--- a/elements/core/core.go
+++ /dev/null
@@ -1,235 +0,0 @@
-package core
-
-import "image"
-import "image/color"
-import "git.tebibyte.media/sashakoshka/tomo"
-import "git.tebibyte.media/sashakoshka/tomo/canvas"
-import "git.tebibyte.media/sashakoshka/tomo/artist"
-import "git.tebibyte.media/sashakoshka/tomo/shatter"
-
-// Core is a struct that implements some core functionality common to most
-// widgets. It is meant to be embedded directly into a struct.
-type Core struct {
-	canvas canvas.Canvas
-	bounds image.Rectangle
-	parent tomo.Parent
-	outer  tomo.Element
-
-	metrics struct {
-		minimumWidth  int
-		minimumHeight int
-	}
-
-	drawSizeChange func ()
-	onDamage       func (region image.Rectangle)
-}
-
-// NewCore creates a new element core and its corresponding control given the
-// element that it will be a part of. If outer is nil, this function will return
-// nil.
-func NewCore (
-	outer tomo.Element,
-	drawSizeChange func (),
-) (
-	core *Core,
-	control CoreControl,
-) {
-	if outer == nil { return }
-	core = &Core {
-		outer:          outer,
-		drawSizeChange: drawSizeChange,
-	}
-	control = CoreControl { core: core }
-	return
-}
-
-// Bounds fulfills the tomo.Element interface. This should not need to be
-// overridden.
-func (core *Core) Bounds () (bounds image.Rectangle) {
-	if core.canvas == nil { return }
-	return core.bounds
-}
-
-// MinimumSize fulfils the tomo.Element interface. This should not need to be
-// overridden.
-func (core *Core) MinimumSize () (width, height int) {
-	return core.metrics.minimumWidth, core.metrics.minimumHeight
-}
-
-// MinimumSize fulfils the tomo.Element interface. This should not need to be
-// overridden, unless you want to detect when the element is parented or
-// unparented.
-func (core *Core) SetParent (parent tomo.Parent) {
-	if parent != nil && core.parent != nil {
-		panic("core.SetParent: element already has a parent")
-	}
-
-	core.parent = parent
-}
-
-// DrawTo fulfills the tomo.Element interface. This should not need to be
-// overridden.
-func (core *Core) DrawTo (
-	canvas   canvas.Canvas,
-	bounds   image.Rectangle,
-	onDamage func (region image.Rectangle),
-) {
-	core.canvas   = canvas
-	core.bounds   = bounds
-	core.onDamage = onDamage
-	if core.drawSizeChange != nil && core.canvas != nil {
-		core.drawSizeChange()
-	}
-}
-
-// CoreControl is a struct that can exert control over a Core struct. It can be
-// used as a canvas. It must not be directly embedded into an element, but
-// instead kept as a private member. When a Core struct is created, a
-// corresponding CoreControl struct is linked to it and returned alongside it.
-type CoreControl struct {
-	core *Core
-}
-
-// ColorModel fulfills the draw.Image interface.
-func (control CoreControl) ColorModel () (model color.Model) {
-	return color.RGBAModel
-}
-
-// At fulfills the draw.Image interface.
-func (control CoreControl) At (x, y int) (pixel color.Color) {
-	if control.core.canvas == nil { return }
-	return control.core.canvas.At(x, y)
-}
-
-// Bounds fulfills the draw.Image interface.
-func (control CoreControl) Bounds () (bounds image.Rectangle) {
-	if control.core.canvas == nil { return }
-	return control.core.canvas.Bounds()
-}
-
-// Set fulfills the draw.Image interface.
-func (control CoreControl) Set (x, y int, c color.Color) () {
-	if control.core.canvas == nil { return }
-	control.core.canvas.Set(x, y, c)
-}
-
-// Buffer fulfills the canvas.Canvas interface.
-func (control CoreControl) Buffer () (data []color.RGBA, stride int) {
-	if control.core.canvas == nil { return }
-	return control.core.canvas.Buffer()
-}
-
-// Parent returns the element's parent.
-func (control CoreControl) Parent () tomo.Parent {
-	return control.core.parent
-}
-
-// DrawBackground fills the element's canvas with the parent's background
-// pattern, if the parent supports it. If it is not supported, the fallback
-// pattern will be used instead.
-func (control CoreControl) DrawBackground (fallback artist.Pattern) {
-	control.DrawBackgroundBounds(fallback, control.Bounds())
-}
-
-// DrawBackgroundBounds is like DrawBackground, but it takes in a bounding
-// rectangle instead of using the element's bounds.
-func (control CoreControl) DrawBackgroundBounds (
-	fallback artist.Pattern,
-	bounds image.Rectangle,
-) {
-	parent, ok := control.Parent().(tomo.BackgroundParent)
-	if ok {
-		parent.DrawBackground(bounds)
-	} else if fallback != nil {
-		fallback.Draw(canvas.Cut(control, bounds), control.Bounds())
-	}
-}
-
-// DrawBackgroundBoundsShatter is like DrawBackgroundBounds, but uses the
-// shattering algorithm to avoid drawing in areas specified by rocks.
-func (control CoreControl) DrawBackgroundBoundsShatter (
-	fallback artist.Pattern,
-	bounds image.Rectangle,
-	rocks ...image.Rectangle,
-) {
-	tiles := shatter.Shatter(bounds, rocks...)
-	for _, tile := range tiles {
-		control.DrawBackgroundBounds(fallback, tile)
-	}
-}
-
-// Window returns the window containing the element.
-func (control CoreControl) Window () tomo.Window {
-	parent := control.Parent()
-	if parent == nil {
-		return nil
-	} else {
-		return parent.Window()
-	}
-}
-
-// Outer returns the outer element given when the control was constructed.
-func (control CoreControl) Outer () tomo.Element {
-	return control.core.outer
-}
-
-// HasImage returns true if the core has an allocated image buffer, and false if
-// it doesn't.
-func (control CoreControl) HasImage () (has bool) {
-	return control.core.canvas != nil && !control.core.canvas.Bounds().Empty()
-}
-
-// DamageRegion pushes the selected region of pixels to the parent element. This
-// does not need to be called when responding to a resize event.
-func (control CoreControl) DamageRegion (regions ...image.Rectangle) {
-	if control.core.canvas == nil { return }
-	if control.core.onDamage != nil {
-		for _, region := range regions {
-			control.core.onDamage(region)
-		}
-	}
-}
-
-// DamageAll pushes all pixels to the parent element. This does not need to be
-// called when redrawing in response to a change in size.
-func (control CoreControl) DamageAll () {
-	control.DamageRegion(control.core.Bounds())
-}
-
-// SetMinimumSize sets the minimum size of this element, notifying the parent
-// element in the process.
-func (control CoreControl) SetMinimumSize (width, height int) {
-	core := control.core
-	if width == core.metrics.minimumWidth &&
-		height == core.metrics.minimumHeight {
-		return
-	}
-
-	core.metrics.minimumWidth  = width
-	core.metrics.minimumHeight = height
-	if control.core.parent != nil {
-		control.core.parent.NotifyMinimumSizeChange(control.core.outer)
-	}
-}
-
-// ConstrainSize contstrains the specified width and height to the minimum width
-// and height, and returns wether or not anything ended up being constrained.
-func (control CoreControl) ConstrainSize (
-	inWidth, inHeight int,
-) (
-	outWidth, outHeight int,
-	constrained bool,
-) {
-	core := control.core
-	outWidth  = inWidth
-	outHeight = inHeight
-	if outWidth < core.metrics.minimumWidth {
-		outWidth = core.metrics.minimumWidth
-		constrained = true
-	}
-	if outHeight < core.metrics.minimumHeight {
-		outHeight = core.metrics.minimumHeight
-		constrained = true
-	}
-	return
-}
diff --git a/elements/core/doc.go b/elements/core/doc.go
deleted file mode 100644
index 5870f79..0000000
--- a/elements/core/doc.go
+++ /dev/null
@@ -1,7 +0,0 @@
-// Package core provides tools that allow elements to easily fulfill common
-// interfaces without having to duplicate a ton of code. Each "core" is a type
-// that can be embedded into an element directly, working to fulfill a
-// particular interface. Each one comes with a corresponding core control, which
-// provides an interface for elements to exert control over the core. Core
-// controls should be kept private.
-package core
diff --git a/elements/core/focusable.go b/elements/core/focusable.go
deleted file mode 100644
index ed3627f..0000000
--- a/elements/core/focusable.go
+++ /dev/null
@@ -1,101 +0,0 @@
-package core
-
-// import "runtime/debug"
-import "git.tebibyte.media/sashakoshka/tomo"
-import "git.tebibyte.media/sashakoshka/tomo/input"
-
-// FocusableCore is a struct that can be embedded into objects to make them
-// focusable, giving them the default keynav behavior.
-type FocusableCore struct {
-	core CoreControl
-	focused bool
-	enabled bool
-	drawFocusChange func ()
-}
-
-// NewFocusableCore creates a new focusability core and its corresponding
-// control. If your element needs to visually update itself when it's focus
-// state changes (which it should), a callback to draw and push the update can
-// be specified. 
-func NewFocusableCore (
-	core CoreControl,
-	drawFocusChange func (),
-) (	
-	focusable *FocusableCore,
-	control FocusableCoreControl,
-) {
-	focusable = &FocusableCore {
-		core: core,
-		drawFocusChange: drawFocusChange,
-		enabled: true,
-	}
-	control = FocusableCoreControl { core: focusable }
-	return
-}
-
-// Focused returns whether or not this element is currently focused.
-func (core *FocusableCore) Focused () (focused bool) {
-	return core.focused
-}
-
-// Focus focuses this element, if its parent element grants the request.
-func (core *FocusableCore) Focus () {
-	if !core.enabled || core.focused { return }
-	parent := core.core.Parent()
-	if parent, ok := parent.(tomo.FocusableParent); ok {
-		core.focused = parent.RequestFocus (
-			core.core.Outer().(tomo.Focusable))
-	}
-}
-
-// HandleFocus causes this element to mark itself as focused, if it can
-// currently be. Otherwise, it will return false and do nothing.
-func (core *FocusableCore) HandleFocus (
-	direction input.KeynavDirection,
-) (
-	accepted bool,
-) {
-	direction = direction.Canon()
-	if !core.enabled { return false }
-	if core.focused && direction != input.KeynavDirectionNeutral {
-		return false
-	}
-
-	if core.focused == false {
-		core.focused = true
-		if core.drawFocusChange != nil { core.drawFocusChange() }
-	}
-	return true
-}
-
-// HandleUnfocus causes this element to mark itself as unfocused.
-func (core *FocusableCore) HandleUnfocus () {
-	core.focused = false
-	// debug.PrintStack()
-	if core.drawFocusChange != nil { core.drawFocusChange() }
-}
-
-// Enabled returns whether or not the element is enabled.
-func (core *FocusableCore) Enabled () (enabled bool) {
-	return core.enabled
-}
-
-// FocusableCoreControl is a struct that can be used to exert control over a
-// focusability core. It must not be directly embedded into an element, but
-// instead kept as a private member. When a FocusableCore struct is created, a
-// corresponding FocusableCoreControl struct is linked to it and returned
-// alongside it.
-type FocusableCoreControl struct {
-	core *FocusableCore
-}
-
-// SetEnabled sets whether the focusability core is enabled. If the state
-// changes, this will call drawFocusChange.
-func (control FocusableCoreControl) SetEnabled (enabled bool) {
-	if control.core.enabled == enabled { return }
-	control.core.enabled = enabled
-	if !enabled { control.core.focused = false }
-	if control.core.drawFocusChange != nil {
-		control.core.drawFocusChange()
-	}
-}
diff --git a/elements/core/propagator.go b/elements/core/propagator.go
deleted file mode 100644
index 656fce1..0000000
--- a/elements/core/propagator.go
+++ /dev/null
@@ -1,355 +0,0 @@
-package core
-
-import "image"
-import "git.tebibyte.media/sashakoshka/tomo"
-import "git.tebibyte.media/sashakoshka/tomo/input"
-
-// Container represents an object that can provide access to a list of child
-// elements.
-type Container interface {
-	Child         (index int) tomo.Element
-	CountChildren () int
-}
-
-// Propagator is a struct that can be embedded into elements that contain one or
-// more children in order to propagate events to them without having to write
-// all of the event handlers. It also implements standard behavior for focus
-// propagation and keyboard navigation.
-type Propagator struct {
-	core      CoreControl
-	container Container
-	drags     [10]tomo.MouseTarget
-	focused   bool
-}
-
-// NewPropagator creates a new event propagator that uses the specified
-// container to access a list of child elements that will have events propagated
-// to them. If container is nil, the function will return nil.
-func NewPropagator (container Container, core CoreControl) (propagator *Propagator) {
-	if container == nil { return nil }
-	propagator = &Propagator {
-		core:      core,
-		container: container,
-	}
-	return
-}
-
-// ----------- Interface fulfillment methods ----------- //
-
-// Focused returns whether or not this element or any of its children
-// are currently focused.
-func (propagator *Propagator) Focused () (focused bool) {
-	return propagator.focused
-}
-
-// Focus focuses this element, if its parent element grants the
-// request.
-func (propagator *Propagator) Focus () {
-	if propagator.focused == true { return }
-	parent := propagator.core.Parent()
-	if parent, ok := parent.(tomo.FocusableParent); ok && parent != nil {
-		propagator.focused = parent.RequestFocus (
-			propagator.core.Outer().(tomo.Focusable))
-	}
-}
-
-// HandleFocus causes this element to mark itself as focused. If the
-// element does not have children or there are no more focusable children in
-// the given direction, it should return false and do nothing. Otherwise, it
-// marks itself as focused along with any applicable children and returns
-// true.
-func (propagator *Propagator) HandleFocus (direction input.KeynavDirection) (accepted bool) {
-	direction = direction.Canon()
-
-	firstFocused := propagator.firstFocused()
-	if firstFocused < 0 {
-		// no element is currently focused, so we need to focus either
-		// the first or last focusable element depending on the
-		// direction.
-		switch direction {
-		case input.KeynavDirectionForward:
-			// if we recieve a forward direction, focus the first
-			// focusable element.
-			return propagator.focusFirstFocusableElement(direction)
-		
-		case input.KeynavDirectionBackward:
-			// if we recieve a backward direction, focus the last
-			// focusable element.
-			return propagator.focusLastFocusableElement(direction)
-
-		case input.KeynavDirectionNeutral:
-			// if we recieve a neutral direction, just focus this
-			// element and nothing else.
-			propagator.focused = true
-			return true
-		}
-	} else {
-		// an element is currently focused, so we need to move the
-		// focus in the specified direction
-		firstFocusedChild :=
-			propagator.container.Child(firstFocused).
-			(tomo.Focusable)
-
-		// before we move the focus, the currently focused child
-		// may also be able to move its focus. if the child is able
-		// to do that, we will let it and not move ours.
-		if firstFocusedChild.HandleFocus(direction) {
-			return true
-		}
-
-		// find the previous/next focusable element relative to the
-		// currently focused element, if it exists.
-		for index := firstFocused + int(direction);
-			index < propagator.container.CountChildren() && index >= 0;
-			index += int(direction) {
-
-			child, focusable :=
-				propagator.container.Child(index).
-				(tomo.Focusable)
-			if focusable && child.HandleFocus(direction) {
-				// we have found one, so we now actually move
-				// the focus.
-				firstFocusedChild.HandleUnfocus()
-				propagator.focused = true
-				return true
-			}
-		}
-	}
-	
-	return false
-}
-
-// RequestFocus notifies the parent that a child element is requesting
-// keyboard focus. If the parent grants the request, the method will
-// return true and the child element should behave as if a HandleFocus
-// call was made.
-func (propagator *Propagator) RequestFocus (
-	child tomo.Focusable,
-) (
-	granted bool,
-) {
-	if parent, ok := propagator.core.Parent().(tomo.FocusableParent); ok {
-		if parent.RequestFocus(propagator.core.Outer().(tomo.Focusable)) {
-			propagator.HandleUnfocus()
-			propagator.focused = true
-			granted = true
-		}
-	}
-	return
-}
-
-// RequestFocusMotion notifies the parent that a child element wants the
-// focus to be moved to the next focusable element.
-func (propagator *Propagator) RequestFocusNext (child tomo.Focusable) {
-	if !propagator.focused { return }
-	if parent, ok := propagator.core.Parent().(tomo.FocusableParent); ok {
-		parent.RequestFocusNext(propagator.core.Outer().(tomo.Focusable))
-	}
-}
-
-// RequestFocusMotion notifies the parent that a child element wants the
-// focus to be moved to the previous focusable element.
-func (propagator *Propagator) RequestFocusPrevious (child tomo.Focusable) {
-	if !propagator.focused { return }
-	if parent, ok := propagator.core.Parent().(tomo.FocusableParent); ok {
-		parent.RequestFocusPrevious(propagator.core.Outer().(tomo.Focusable))
-	}
-}
-
-// HandleDeselection causes this element to mark itself and all of its children
-// as unfocused.
-func (propagator *Propagator) HandleUnfocus () {
-	propagator.forFocusable (func (child tomo.Focusable) bool {
-		child.HandleUnfocus()
-		return true
-	})
-	propagator.focused = false
-}
-
-// HandleKeyDown propogates the keyboard event to the currently selected child.
-func (propagator *Propagator) HandleKeyDown (key input.Key, modifiers input.Modifiers) {
-	propagator.forFocused (func (child tomo.Focusable) bool {
-		typedChild, handlesKeyboard := child.(tomo.KeyboardTarget)
-		if handlesKeyboard {
-			typedChild.HandleKeyDown(key, modifiers)
-		}
-		return true
-	})
-}
-
-// HandleKeyUp propogates the keyboard event to the currently selected child.
-func (propagator *Propagator) HandleKeyUp (key input.Key, modifiers input.Modifiers) {
-	propagator.forFocused (func (child tomo.Focusable) bool {
-		typedChild, handlesKeyboard := child.(tomo.KeyboardTarget)
-		if handlesKeyboard {
-			typedChild.HandleKeyUp(key, modifiers)
-		}
-		return true
-	})
-}
-
-// HandleMouseDown propagates the mouse event to the element under the mouse
-// pointer.
-func (propagator *Propagator) HandleMouseDown (x, y int, button input.Button) {
-	child, handlesMouse :=
-		propagator.childAt(image.Pt(x, y)).
-		(tomo.MouseTarget)
-	if handlesMouse {
-		propagator.drags[button] = child
-		child.HandleMouseDown(x, y, button)
-	}
-}
-
-// HandleMouseUp propagates the mouse event to the element that the released
-// mouse button was originally pressed on.
-func (propagator *Propagator) HandleMouseUp (x, y int, button input.Button) {
-	child := propagator.drags[button]
-	if child != nil {
-		propagator.drags[button] = nil
-		child.HandleMouseUp(x, y, button)
-	}
-}
-
-// HandleMotion propagates the mouse event to the element that was last
-// pressed down by the mouse if the mouse is currently being held down, else it
-// propagates the event to whichever element is underneath the mouse pointer.
-func (propagator *Propagator) HandleMotion (x, y int) {
-	handled := false
-	for _, child := range propagator.drags {
-		if child, ok := child.(tomo.MotionTarget); ok {
-			child.HandleMotion(x, y)
-			handled = true
-		}
-	}
-
-	if !handled {
-		child := propagator.childAt(image.Pt(x, y))
-		if child, ok := child.(tomo.MotionTarget); ok {
-			child.HandleMotion(x, y)
-		}
-	}
-}
-
-// HandleScroll propagates the mouse event to the element under the mouse
-// pointer.
-func (propagator *Propagator) HandleScroll (x, y int, deltaX, deltaY float64) {
-	child := propagator.childAt(image.Pt(x, y))
-	if child, ok := child.(tomo.ScrollTarget); ok {
-		child.HandleScroll(x, y, deltaX, deltaY)
-	}
-}
-
-// SetTheme sets the theme of all children to the specified theme.
-func (propagator *Propagator) SetTheme (theme tomo.Theme) {
-	propagator.forChildren (func (child tomo.Element) bool {
-		typedChild, themeable := child.(tomo.Themeable)
-		if themeable {
-			typedChild.SetTheme(theme)
-		}
-		return true
-	})
-}
-
-// SetConfig sets the theme of all children to the specified config.
-func (propagator *Propagator) SetConfig (config tomo.Config) {
-	propagator.forChildren (func (child tomo.Element) bool {
-		typedChild, configurable := child.(tomo.Configurable)
-		if configurable {
-			typedChild.SetConfig(config)
-		}
-		return true
-	})
-}
-
-// ----------- Focusing utilities ----------- //
-
-func (propagator *Propagator) focusFirstFocusableElement (
-	direction input.KeynavDirection,
-) (
-	ok bool,
-) {
-	propagator.forFocusable (func (child tomo.Focusable) bool {
-		if child.HandleFocus(direction) {
-			propagator.focused = true
-			ok = true
-			return false
-		}
-		return true
-	})
-	return
-}
-
-func (propagator *Propagator) focusLastFocusableElement (
-	direction input.KeynavDirection,
-) (
-	ok bool,
-) {
-	propagator.forChildrenReverse (func (child tomo.Element) bool {
-		typedChild, focusable := child.(tomo.Focusable)
-		if focusable && typedChild.HandleFocus(direction) {
-			propagator.focused = true
-			ok = true
-			return false
-		}
-		return true
-	})
-	return
-}
-
-// ----------- Iterator utilities ----------- //
-
-func (propagator *Propagator) forChildren (callback func (child tomo.Element) bool) {
-	for index := 0; index < propagator.container.CountChildren(); index ++ {
-		child := propagator.container.Child(index)
-		if child == nil     { continue }
-		if !callback(child) { break    }
-	}
-}
-
-func (propagator *Propagator) forChildrenReverse (callback func (child tomo.Element) bool) {
-	for index := propagator.container.CountChildren() - 1; index > 0; index -- {
-		child := propagator.container.Child(index)
-		if child == nil     { continue }
-		if !callback(child) { break    }
-	}
-}
-
-func (propagator *Propagator) childAt (position image.Point) (child tomo.Element) {
-	propagator.forChildren (func (current tomo.Element) bool {
-		if position.In(current.Bounds()) {
-			child = current
-		}
-		return true
-	})
-	return
-}
-
-func (propagator *Propagator) forFocused (callback func (child tomo.Focusable) bool) {
-	propagator.forChildren (func (child tomo.Element) bool {
-		typedChild, focusable := child.(tomo.Focusable)
-		if focusable && typedChild.Focused() {
-			if !callback(typedChild) { return false }
-		}
-		return true
-	})
-}
-
-func (propagator *Propagator) forFocusable (callback func (child tomo.Focusable) bool) {
-	propagator.forChildren (func (child tomo.Element) bool {
-		typedChild, focusable := child.(tomo.Focusable)
-		if focusable {
-			if !callback(typedChild) { return false }
-		}
-		return true
-	})
-}
-
-func (propagator *Propagator) firstFocused () int {
-	for index := 0; index < propagator.container.CountChildren(); index ++ {
-		child, focusable := propagator.container.Child(index).(tomo.Focusable)
-		if focusable && child.Focused() {
-			return index
-		}
-	}
-	return -1
-}