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Added extended selection capabilities to the API

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This commit is contained in:
Sasha Koshka
2023-01-11 15:46:48 -05:00
parent 5b850ef183
commit c2a76fcaf6
8 changed files with 72 additions and 68 deletions
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78
elements/core/core.go
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@@ -16,6 +16,7 @@ type Core struct {
}
selectable bool
selected bool
hooks tomo.ParentHooks
}
@@ -47,14 +48,22 @@ func (core Core) Bounds () (bounds image.Rectangle) {
return
}
func (core *Core) SetParentHooks (hooks tomo.ParentHooks) {
core.hooks = hooks
}
func (core Core) Selectable () (selectable bool) {
return core.selectable
}
func (core Core) Selected () (selected bool) {
return core.selected
}
func (core Core) AdvanceSelection (direction int) (ok bool) {
return
}
func (core *Core) SetParentHooks (hooks tomo.ParentHooks) {
core.hooks = hooks
}
func (core Core) MinimumSize () (width, height int) {
return core.metrics.minimumWidth, core.metrics.minimumHeight
}
@@ -76,6 +85,18 @@ func (control CoreControl) Select () {
control.core.hooks.RunSelectionRequest()
}
func (control CoreControl) SetSelected (selected bool) {
if !control.core.selectable { return }
control.core.selected = selected
}
func (control CoreControl) SetSelectable (selectable bool) {
if control.core.selectable == selectable { return }
control.core.selectable = selectable
if !selectable { control.core.selected = false }
control.core.hooks.RunSelectabilityChange(selectable)
}
func (control CoreControl) PushRegion (bounds image.Rectangle) {
control.core.hooks.RunDraw(control.SubImage(bounds).(*image.RGBA))
}
@@ -91,38 +112,31 @@ func (control *CoreControl) AllocateCanvas (width, height int) {
control.RGBA = core.canvas
}
func (control CoreControl) SetSelectable (selectable bool) {
changed := control.core.selectable != selectable
control.core.selectable = selectable
if changed {
control.core.hooks.RunSelectabilityChange(selectable)
}
}
func (control CoreControl) SetMinimumSize (width, height int) {
core := control.core
if width != core.metrics.minimumWidth ||
height != core.metrics.minimumHeight {
if width == core.metrics.minimumWidth &&
height == core.metrics.minimumHeight {
return
}
core.metrics.minimumWidth = width
core.metrics.minimumHeight = height
core.hooks.RunMinimumSizeChange(width, height)
core.metrics.minimumWidth = width
core.metrics.minimumHeight = height
core.hooks.RunMinimumSizeChange(width, height)
// if there is an image buffer, and the current size is less
// than this new minimum size, send core.parent a resize event.
if control.HasImage() {
bounds := control.Bounds()
imageWidth,
imageHeight,
constrained := control.ConstrainSize (
bounds.Dx(),
bounds.Dy())
if constrained {
core.parent.Handle (tomo.EventResize {
Width: imageWidth,
Height: imageHeight,
})
}
// if there is an image buffer, and the current size is less
// than this new minimum size, send core.parent a resize event.
if control.HasImage() {
bounds := control.Bounds()
imageWidth,
imageHeight,
constrained := control.ConstrainSize (
bounds.Dx(),
bounds.Dy())
if constrained {
core.parent.Handle (tomo.EventResize {
Width: imageWidth,
Height: imageHeight,
})
}
}
}