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Redid cores to conform to the new API changes

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This commit is contained in:
Sasha Koshka
2023-03-14 18:30:32 -04:00
parent b08cbea320
commit a34e8768ab
4 changed files with 93 additions and 107 deletions
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66
elements/core/core.go
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@@ -3,31 +3,38 @@ package core
import "image"
import "image/color"
import "git.tebibyte.media/sashakoshka/tomo/canvas"
import "git.tebibyte.media/sashakoshka/tomo/elements"
// 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 elements.Parent
outer elements.Element
metrics struct {
minimumWidth int
minimumHeight int
}
drawSizeChange func ()
onMinimumSizeChange func ()
onDamage func (region canvas.Canvas)
drawSizeChange func ()
onDamage func (region image.Rectangle)
}
// NewCore creates a new element core and its corresponding control.
// 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 elements.Element,
drawSizeChange func (),
) (
core *Core,
control CoreControl,
) {
if outer == nil { return }
core = &Core {
outer: outer,
drawSizeChange: drawSizeChange,
}
control = CoreControl { core: core }
@@ -47,28 +54,32 @@ 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 elements.Parent) {
if 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) {
core.canvas = canvas
core.bounds = bounds
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()
}
}
// OnDamage fulfils the tomo.Element interface. This should not need to be
// overridden.
func (core *Core) OnDamage (callback func (region canvas.Canvas)) {
core.onDamage = callback
}
// OnMinimumSizeChange fulfils the tomo.Element interface. This should not need
// to be overridden.
func (core *Core) OnMinimumSizeChange (callback func ()) {
core.onMinimumSizeChange = callback
}
// 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
@@ -106,6 +117,16 @@ func (control CoreControl) Buffer () (data []color.RGBA, stride int) {
return control.core.canvas.Buffer()
}
// Parent returns the element's parent.
func (control CoreControl) Parent () elements.Parent {
return control.core.parent
}
// Outer returns the outer element given when the control was constructed.
func (control CoreControl) Outer () elements.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) {
@@ -118,8 +139,7 @@ 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 (
canvas.Cut(control.core.canvas, region))
control.core.onDamage(region)
}
}
}
@@ -141,8 +161,8 @@ func (control CoreControl) SetMinimumSize (width, height int) {
core.metrics.minimumWidth = width
core.metrics.minimumHeight = height
if control.core.onMinimumSizeChange != nil {
control.core.onMinimumSizeChange()
if control.core.parent != nil {
control.core.parent.NotifyMinimumSizeChange(control.core.outer)
}
}