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Element core now conforms to the new API

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This commit is contained in:
Sasha Koshka 2023-01-19 14:44:40 -05:00
parent 6bea614044
commit 662d3464e2
1 changed files with 23 additions and 42 deletions
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65
elements/core/core.go
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@ -17,7 +17,9 @@ type Core struct {
selectable bool selectable bool
selected bool selected bool
hooks tomo.ParentHooks
onMinimumSizeChange func ()
onDamage func (region tomo.Canvas)
} }
// NewCore creates a new element core and its corresponding control. // NewCore creates a new element core and its corresponding control.
@ -58,10 +60,16 @@ func (core *Core) MinimumSize () (width, height int) {
return core.metrics.minimumWidth, core.metrics.minimumHeight return core.metrics.minimumWidth, core.metrics.minimumHeight
} }
// SetParentHooks fulfils the tomo.Element interface. This should not need to be // OnDamage fulfils the tomo.Element interface. This should not need to be
// overridden. // overridden.
func (core *Core) SetParentHooks (hooks tomo.ParentHooks) { func (core *Core) OnDamage (callback func (region tomo.Canvas)) {
core.hooks = hooks 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 // CoreControl is a struct that can exert control over a Core struct. It can be
@ -73,41 +81,24 @@ type CoreControl struct {
core *Core core *Core
} }
// RequestSelection requests that the element's parent send it a selection
// event. If the request was granted, it returns true. If it was denied, it
// returns false.
func (control CoreControl) RequestSelection () (granted bool) {
return control.core.hooks.RunSelectionRequest()
}
// RequestSelectionMotion requests that the element's parent deselect this
// element and select the one to the left or right of it, depending on the
// direction. If the requests was granted, it returns true. If it was denied, it
// returns false.
func (control CoreControl) RequestSelectionMotion (
direction tomo.SelectionDirection,
) (
granted bool,
) {
return control.core.hooks.RunSelectionMotionRequest(direction)
}
// HasImage returns true if the core has an allocated image buffer, and false if // HasImage returns true if the core has an allocated image buffer, and false if
// it doesn't. // it doesn't.
func (control CoreControl) HasImage () (has bool) { func (control CoreControl) HasImage () (has bool) {
return !control.Bounds().Empty() return !control.Bounds().Empty()
} }
// PushRegion pushes the selected region of pixels to the parent element. This // DamageRegion pushes the selected region of pixels to the parent element. This
// does not need to be called when responding to a resize event. // does not need to be called when responding to a resize event.
func (control CoreControl) PushRegion (bounds image.Rectangle) { func (control CoreControl) DamageRegion (bounds image.Rectangle) {
control.core.hooks.RunDraw(tomo.Cut(control, bounds)) if control.core.onDamage != nil {
control.core.onDamage(tomo.Cut(control, bounds))
}
} }
// PushAll pushes all pixels to the parent element. This does not need to be // DamageAll pushes all pixels to the parent element. This does not need to be
// called when responding to a resize event. // called when responding to a resize event.
func (control CoreControl) PushAll () { func (control CoreControl) DamageAll () {
control.PushRegion(control.Bounds()) control.DamageRegion(control.Bounds())
} }
// AllocateCanvas resizes the canvas, constraining the width and height so that // AllocateCanvas resizes the canvas, constraining the width and height so that
@ -128,7 +119,9 @@ func (control CoreControl) SetMinimumSize (width, height int) {
core.metrics.minimumWidth = width core.metrics.minimumWidth = width
core.metrics.minimumHeight = height core.metrics.minimumHeight = height
core.hooks.RunMinimumSizeChange(width, height) if control.core.onMinimumSizeChange != nil {
control.core.onMinimumSizeChange()
}
// if there is an image buffer, and the current size is less // if there is an image buffer, and the current size is less
// than this new minimum size, send core.parent a resize event. // than this new minimum size, send core.parent a resize event.
@ -143,18 +136,6 @@ func (control CoreControl) SetMinimumSize (width, height int) {
} }
} }
// NotifyFlexibleHeightChange notifies the parent element that this element's
// flexible height has changed.
func (control CoreControl) NotifyFlexibleHeightChange () {
control.core.hooks.RunFlexibleHeightChange()
}
// NotifyContentBoundsChange notifies the parent element that this element's
// inner content bounds or scroll position have changed.
func (control CoreControl) NotifyContentBoundsChange () {
control.core.hooks.RunContentBoundsChange()
}
// ConstrainSize contstrains the specified width and height to the minimum width // ConstrainSize contstrains the specified width and height to the minimum width
// and height, and returns wether or not anything ended up being constrained. // and height, and returns wether or not anything ended up being constrained.
func (control CoreControl) ConstrainSize ( func (control CoreControl) ConstrainSize (