137 lines
3.4 KiB
Go
137 lines
3.4 KiB
Go
package basic
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import "git.tebibyte.media/sashakoshka/tomo"
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import "git.tebibyte.media/sashakoshka/tomo/theme"
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import "git.tebibyte.media/sashakoshka/tomo/artist"
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import "git.tebibyte.media/sashakoshka/tomo/elements/core"
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type Container struct {
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*core.Core
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core core.CoreControl
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layout tomo.Layout
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children []tomo.LayoutEntry
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selectable bool
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}
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func NewContainer (layout tomo.Layout) (element *Container) {
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element = &Container { }
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element.Core, element.core = core.NewCore(element)
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element.SetLayout(layout)
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return
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}
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func (element *Container) SetLayout (layout tomo.Layout) {
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element.layout = layout
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element.recalculate()
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}
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func (element *Container) Adopt (child tomo.Element, expand bool) {
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child.SetParentHooks (tomo.ParentHooks {
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MinimumSizeChange:
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func (int, int) { element.updateMinimumSize() },
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SelectabilityChange:
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func (bool) { element.updateSelectable() },
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})
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element.children = append (element.children, tomo.LayoutEntry {
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Element: child,
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})
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element.updateMinimumSize()
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element.updateSelectable()
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element.recalculate()
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if element.core.HasImage() { element.draw() }
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}
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// Disown removes the given child from the container if it is contained within
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// it.
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func (element *Container) Disown (child tomo.Element) {
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for index, entry := range element.children {
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if entry.Element == child {
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entry.SetParentHooks(tomo.ParentHooks { })
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element.children = append (
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element.children[:index],
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element.children[index + 1:]...)
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break
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}
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}
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element.updateMinimumSize()
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element.updateSelectable()
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element.recalculate()
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if element.core.HasImage() { element.draw() }
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}
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// Children returns a slice containing this element's children.
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func (element *Container) Children () (children []tomo.Element) {
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children = make([]tomo.Element, len(element.children))
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for index, entry := range element.children {
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children[index] = entry.Element
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}
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return
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}
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// CountChildren returns the amount of children contained within this element.
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func (element *Container) CountChildren () (count int) {
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return len(element.children)
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}
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// Child returns the child at the specified index. If the index is out of
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// bounds, this method will return nil.
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func (element *Container) Child (index int) (child tomo.Element) {
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if index < 0 || index > len(element.children) { return }
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return element.children[index].Element
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}
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func (element *Container) Handle (event tomo.Event) {
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switch event.(type) {
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case tomo.EventResize:
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resizeEvent := event.(tomo.EventResize)
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element.core.AllocateCanvas (
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resizeEvent.Width,
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resizeEvent.Height)
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element.recalculate()
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element.draw()
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// TODO:
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}
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return
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}
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func (element *Container) AdvanceSelection (direction int) (ok bool) {
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// TODO:
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return
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}
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func (element *Container) updateSelectable () {
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selectable := false
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for _, entry := range element.children {
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if entry.Selectable() { selectable = true }
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}
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element.core.SetSelectable(selectable)
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}
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func (element *Container) updateMinimumSize () {
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element.core.SetMinimumSize(element.layout.MinimumSize(element.children))
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}
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func (element *Container) recalculate () {
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bounds := element.Bounds()
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element.layout.Arrange(element.children, bounds.Dx(), bounds.Dy())
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}
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func (element *Container) draw () {
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bounds := element.core.Bounds()
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artist.Rectangle (
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element.core,
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theme.BackgroundImage(),
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nil, 0,
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bounds)
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// TODO
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for _, entry := range element.children {
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artist.Paste(element.core, entry, entry.Position)
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}
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}
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