tomo/objects
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Scrollbar no longer embeds tomo.ContainerBox

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This commit is contained in:
Sasha Koshka 2024-08-24 21:35:43 -04:00
parent 02fed8ce48
commit bc175bb5ae
1 changed files with 31 additions and 24 deletions
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55
scrollbar.go
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@ -5,10 +5,12 @@ import "git.tebibyte.media/tomo/tomo"
import "git.tebibyte.media/tomo/tomo/input"
import "git.tebibyte.media/tomo/tomo/event"
var _ tomo.Object = new(Scrollbar)
// Scrollbar is a special type of slider that can control the scroll of any
// overflowing ContainerBox.
// overflowing ContainerObject.
type Scrollbar struct {
tomo.ContainerBox
box tomo.ContainerBox
handle *sliderHandle
layout scrollbarLayout
dragging bool
@ -23,7 +25,7 @@ type Scrollbar struct {
func newScrollbar (orient string) *Scrollbar {
this := &Scrollbar {
ContainerBox: tomo.NewContainerBox(),
box: tomo.NewContainerBox(),
handle: &sliderHandle {
Box: tomo.NewBox(),
},
@ -32,21 +34,21 @@ func newScrollbar (orient string) *Scrollbar {
},
}
this.Add(this.handle)
this.box.Add(this.handle)
this.SetFocusable(true)
this.SetInputMask(true)
this.OnKeyUp(this.handleKeyUp)
this.OnKeyDown(this.handleKeyDown)
this.OnButtonDown(this.handleButtonDown)
this.OnButtonUp(this.handleButtonUp)
this.OnMouseMove(this.handleMouseMove)
this.OnScroll(this.handleScroll)
this.box.SetFocusable(true)
this.box.SetInputMask(true)
this.box.OnKeyUp(this.handleKeyUp)
this.box.OnKeyDown(this.handleKeyDown)
this.box.OnButtonDown(this.handleButtonDown)
this.box.OnButtonUp(this.handleButtonUp)
this.box.OnMouseMove(this.handleMouseMove)
this.box.OnScroll(this.handleScroll)
this.handle.SetRole(tomo.R("objects", "ScrollbarHandle"))
this.handle.SetTag(orient, true)
this.SetRole(tomo.R("objects", "Scrollbar"))
this.SetTag(orient, true)
this.box.SetRole(tomo.R("objects", "Scrollbar"))
this.box.SetTag(orient, true)
return this
}
@ -60,13 +62,18 @@ func NewHorizontalScrollbar () *Scrollbar {
return newScrollbar("horizontal")
}
// GetBox returns the underlying box.
func (this *Scrollbar) GetBox () tomo.Box {
return this.box
}
// Link assigns this scrollbar to a ContentObject. Closing the returned cookie
// will unlink it.
func (this *Scrollbar) Link (box tomo.ContentObject) event.Cookie {
this.layout.linked = box
this.linkCookie = this.newLinkCookie (
box.OnContentBoundsChange(this.handleLinkedContentBoundsChange))
this.SetAttr(tomo.ALayout(this.layout))
this.box.SetAttr(tomo.ALayout(this.layout))
return this.linkCookie
}
@ -79,7 +86,7 @@ func (this *Scrollbar) handleLinkedContentBoundsChange () {
} else {
this.layout.value = this.layout.contentPos() / trackLength
}
this.SetAttr(tomo.ALayout(this.layout))
this.box.SetAttr(tomo.ALayout(this.layout))
if this.layout.value != previousValue {
this.on.valueChange.Broadcast()
}
@ -150,7 +157,7 @@ func (this *Scrollbar) handleKeyUp (key input.Key, numpad bool) bool {
}
func (this *Scrollbar) handleKeyDown (key input.Key, numpad bool) bool {
modifiers := this.Window().Modifiers()
modifiers := this.box.Window().Modifiers()
switch key {
case input.KeyUp, input.KeyLeft:
@ -183,7 +190,7 @@ func (this *Scrollbar) handleKeyDown (key input.Key, numpad bool) bool {
}
func (this *Scrollbar) handleButtonDown (button input.Button) bool {
pointer := this.Window().MousePosition()
pointer := this.box.Window().MousePosition()
handle := this.handle.Bounds()
within := pointer.In(handle)
@ -199,7 +206,7 @@ func (this *Scrollbar) handleButtonDown (button input.Button) bool {
this.dragging = true
this.dragOffset =
pointer.Sub(this.handle.Bounds().Min).
Add(this.InnerBounds().Min)
Add(this.box.InnerBounds().Min)
this.drag()
} else {
this.dragOffset = this.fallbackDragOffset()
@ -253,8 +260,8 @@ func (this *Scrollbar) handleScroll (x, y float64) bool {
}
func (this *Scrollbar) drag () {
pointer := this.Window().MousePosition().Sub(this.dragOffset)
gutter := this.InnerBounds()
pointer := this.box.Window().MousePosition().Sub(this.dragOffset)
gutter := this.box.InnerBounds()
handle := this.handle.Bounds()
if this.layout.vertical {
@ -270,10 +277,10 @@ func (this *Scrollbar) drag () {
func (this *Scrollbar) fallbackDragOffset () image.Point {
if this.layout.vertical {
return this.InnerBounds().Min.
return this.box.InnerBounds().Min.
Add(image.Pt(0, this.handle.Bounds().Dy() / 2))
} else {
return this.InnerBounds().Min.
return this.box.InnerBounds().Min.
Add(image.Pt(this.handle.Bounds().Dx() / 2, 0))
}
}
@ -307,7 +314,7 @@ func (this *scrollbarCookie) Close () {
cookie.Close()
}
this.owner.layout.linked = nil
this.owner.SetAttr(tomo.ALayout(this.owner.layout))
this.owner.box.SetAttr(tomo.ALayout(this.owner.layout))
}
type scrollbarLayout struct {