Sasha Koshka
6ede0d0770
Parents are now able to draw backgrounds for their children. This means we can now have elements inside other elements that aren't restricted to one background color.
72 lines
2.6 KiB
Go
72 lines
2.6 KiB
Go
package tomo
|
|
|
|
import "image"
|
|
|
|
// Parent represents a type capable of containing child elements.
|
|
type Parent interface {
|
|
// NotifyMinimumSizeChange notifies the container that a child element's
|
|
// minimum size has changed. This method is expected to be called by
|
|
// child elements when their minimum size changes.
|
|
NotifyMinimumSizeChange (child Element)
|
|
|
|
// Window returns the window containing the parent.
|
|
Window () Window
|
|
}
|
|
|
|
// FocusableParent represents a parent with keyboard navigation support.
|
|
type FocusableParent interface {
|
|
Parent
|
|
|
|
// RequestFocus notifies the parent that a child element is requesting
|
|
// keyboard focus. If the parent grants the request, the method will
|
|
// return true and the child element should behave as if a HandleFocus
|
|
// call was made.
|
|
RequestFocus (child Focusable) (granted bool)
|
|
|
|
// RequestFocusMotion notifies the parent that a child element wants the
|
|
// focus to be moved to the next focusable element.
|
|
RequestFocusNext (child Focusable)
|
|
|
|
// RequestFocusMotion notifies the parent that a child element wants the
|
|
// focus to be moved to the previous focusable element.
|
|
RequestFocusPrevious (child Focusable)
|
|
}
|
|
|
|
// FlexibleParent represents a parent that accounts for elements with
|
|
// flexible height.
|
|
type FlexibleParent interface {
|
|
Parent
|
|
|
|
// NotifyFlexibleHeightChange notifies the parent that the parameters
|
|
// affecting a child's flexible height have changed. This method is
|
|
// expected to be called by flexible child element when their content
|
|
// changes.
|
|
NotifyFlexibleHeightChange (child Flexible)
|
|
}
|
|
|
|
// ScrollableParent represents a parent that can change the scroll
|
|
// position of its child element(s).
|
|
type ScrollableParent interface {
|
|
Parent
|
|
|
|
// NotifyScrollBoundsChange notifies the parent that a child's scroll
|
|
// content bounds or viewport bounds have changed. This is expected to
|
|
// be called by child elements when they change their supported scroll
|
|
// axes, their scroll position (either autonomously or as a result of a
|
|
// call to ScrollTo()), or their content size.
|
|
NotifyScrollBoundsChange (child Scrollable)
|
|
}
|
|
|
|
// BackgroundParent represents a parent that is able to re-draw a portion of its
|
|
// background upon request. This is intended to be used by transparent elements
|
|
// that want to adopt their parent's background pattern. If a parent implements
|
|
// this interface, it should call a child's DrawTo method when its area of the
|
|
// background is affected.
|
|
type BackgroundParent interface {
|
|
Parent
|
|
|
|
// DrawBackground draws a portion of the parent's background pattern
|
|
// within the specified bounds. The parent will not push these changes.
|
|
DrawBackground (bounds image.Rectangle)
|
|
}
|