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-rw-r--r--lib/ui/interfaces.go42
1 files changed, 42 insertions, 0 deletions
diff --git a/lib/ui/interfaces.go b/lib/ui/interfaces.go
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+package ui
+
+import (
+ "github.com/gdamore/tcell"
+)
+
+type Drawable interface {
+ // Called when this renderable should draw itself
+ Draw(ctx *Context)
+ // Specifies a function to call when this cell needs to be redrawn
+ OnInvalidate(callback func(d Drawable))
+ // Invalidates the drawable
+ Invalidate()
+}
+
+type Interactive interface {
+ // Returns true if the event was handled by this component
+ Event(event tcell.Event) bool
+}
+
+type Simulator interface {
+ // Queues up the given input events for simulation
+ Simulate(events []tcell.Event)
+}
+
+type DrawableInteractive interface {
+ Drawable
+ Interactive
+}
+
+// A drawable which contains other drawables
+type Container interface {
+ Drawable
+ // A list of all drawables which are children of this one (do not recurse
+ // into your grandchildren).
+ Children() []Drawable
+ // Return the "focused" child, or none of no preference. Does not actually
+ // have to be Interactive. If there is a preferred child, input events will
+ // be directed to it. If there's no preference, events will be delivered to
+ // all children.
+ InteractiveChild() Drawable
+}