107 lines
2.2 KiB
Go
107 lines
2.2 KiB
Go
package ui
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import (
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"time"
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"opslag.de/schobers/geom"
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"opslag.de/schobers/zntg/allg5"
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)
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type Container interface {
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Control
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Children() []Control
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Arrange(Context, geom.RectangleF)
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}
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func NewContainer(parent Container, children ...Control) *ContainerBase {
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return &ContainerBase{ControlBase{}, false, parent, children}
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}
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type ContainerBase struct {
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ControlBase
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created bool
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parent Container
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children []Control
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}
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func (c *ContainerBase) Children() []Control {
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return c.children
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}
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func (c *ContainerBase) Arrange(ctx Context, rect geom.RectangleF) {
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c.ControlBase.SetRect(rect)
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for _, child := range c.children {
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Arrange(ctx, child, rect)
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}
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}
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func (c *ContainerBase) Append(child Control) {
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if c.created {
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panic("error append, must use append create when control is already created")
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}
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c.children = append(c.children, child)
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}
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func (c *ContainerBase) AppendCreate(ctx Context, child Control) error {
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if !c.created {
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panic("error append create, must use append when control is not yet created")
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}
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c.children = append(c.children, child)
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return child.Created(ctx, c)
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}
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func (c *ContainerBase) RemoveFn(ctx Context, pred func(Control) bool) {
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var i = 0
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for i < len(c.children) {
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if pred(c.children[i]) {
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c.children[i].Destroyed(ctx)
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c.children = c.children[:i+copy(c.children[i:], c.children[i+1:])]
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} else {
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i++
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}
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}
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}
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func (c *ContainerBase) Created(ctx Context, p Container) error {
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if c.created {
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panic("already created")
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}
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c.parent = p
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for _, child := range c.children {
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err := child.Created(ctx, p)
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if nil != err {
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return err
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}
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}
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c.created = true
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return nil
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}
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func (c *ContainerBase) Destroyed(ctx Context) {
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if !c.created {
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panic("not yet created or already destroyed")
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}
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for _, child := range c.children {
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child.Destroyed(ctx)
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}
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}
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func (c *ContainerBase) Update(ctx Context, dt time.Duration) {
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for _, child := range c.children {
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child.Update(ctx, dt)
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}
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}
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func (c *ContainerBase) Handle(ctx Context, ev allg5.Event) {
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for _, child := range c.children {
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child.Handle(ctx, ev)
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}
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}
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func (c *ContainerBase) Render(ctx Context) {
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for _, child := range c.children {
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child.Render(ctx)
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}
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c.ControlBase.Render(ctx)
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}
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