127 lines
2.5 KiB
Go
127 lines
2.5 KiB
Go
package etk
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import (
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"image"
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"image/color"
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"sync"
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"github.com/hajimehoshi/ebiten/v2"
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)
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// Box is a building block for other widgets. It may also be used as a spacer
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// in layout widgets.
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type Box struct {
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rect image.Rectangle
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children []Widget
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background color.RGBA
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visible bool
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sync.Mutex
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}
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// NewBox returns a new Box widget.
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func NewBox() *Box {
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return &Box{
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background: transparent,
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visible: true,
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}
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}
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// Rect returns the position and size of the widget.
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func (b *Box) Rect() image.Rectangle {
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b.Lock()
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defer b.Unlock()
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return b.rect
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}
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// SetRect sets the position and size of the widget.
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func (b *Box) SetRect(r image.Rectangle) {
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b.Lock()
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b.rect = r
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b.Unlock()
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for _, w := range b.children {
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w.SetRect(r)
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}
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}
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// Background returns the background color of the widget.
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func (b *Box) Background() color.RGBA {
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b.Lock()
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defer b.Unlock()
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return b.background
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}
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// SetBackground sets the background color of the widget.
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func (b *Box) SetBackground(background color.RGBA) {
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b.Lock()
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defer b.Unlock()
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b.background = background
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}
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// Focus returns the focus state of the widget.
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func (b *Box) Focus() bool {
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return false
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}
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// SetFocus sets the focus state of the widget.
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func (b *Box) SetFocus(focus bool) bool {
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return false
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}
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// Visible returns the visibility of the widget.
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func (b *Box) Visible() bool {
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return b.visible
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}
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// SetVisible sets the visibility of the widget.
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func (b *Box) SetVisible(visible bool) {
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b.visible = visible
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}
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// HandleKeyboard is called when a keyboard event occurs.
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func (b *Box) HandleKeyboard(key ebiten.Key, r rune) (handled bool, err error) {
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return false, nil
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}
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// HandleMouse is called when a mouse event occurs. Only mouse events that
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// are on top of the widget are passed to the widget.
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func (b *Box) HandleMouse(cursor image.Point, pressed bool, clicked bool) (handled bool, err error) {
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return false, nil
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}
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// Draw draws the widget on the screen.
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func (b *Box) Draw(screen *ebiten.Image) error {
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return nil
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}
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// Children returns the children of the widget. Children are drawn in the
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// order they are returned. Keyboard and mouse events are passed to children
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// in reverse order.
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func (b *Box) Children() []Widget {
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b.Lock()
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defer b.Unlock()
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return b.children
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}
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// AddChild adds a child to the widget.
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func (b *Box) AddChild(w ...Widget) {
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b.Lock()
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defer b.Unlock()
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b.children = append(b.children, w...)
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}
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// Clear removes all children from the widget.
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func (b *Box) Clear() {
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b.Lock()
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defer b.Unlock()
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b.children = b.children[:0]
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}
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var _ Widget = &Box{}
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