105 lines
2.1 KiB
Go
105 lines
2.1 KiB
Go
package ui
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import (
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"opslag.de/schobers/geom"
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"opslag.de/schobers/zntg"
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)
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var _ Control = &Overlays{}
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type OverlayVisibilityChangedArgs struct {
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Name string
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Visible bool
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}
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type Overlays struct {
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Proxy
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overlays map[string]Overlay
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order []string
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visible map[string]bool
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overlayHidden zntg.Events
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overlayShown zntg.Events
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visibilityChanged zntg.Events
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}
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func NewOverlays(over Control) *Overlays {
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return &Overlays{
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Proxy: Proxy{Content: over},
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overlays: map[string]Overlay{},
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visible: map[string]bool{},
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}
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}
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func (o *Overlays) setVisibility(name string, visible bool) {
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if o.visible[name] == visible {
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return
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}
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o.visible[name] = visible
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overlay, ok := o.overlays[name].(Overlay)
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if ok {
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if visible {
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overlay.Shown()
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} else {
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overlay.Hidden()
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}
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}
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o.visibilityChanged.Notify(OverlayVisibilityChangedArgs{Name: name, Visible: visible})
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if visible {
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o.overlayShown.Notify(name)
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} else {
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o.overlayHidden.Notify(name)
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}
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}
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func (o *Overlays) AddOnTop(name string, overlay Overlay, visible bool) {
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o.order = append(o.order, name)
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o.overlays[name] = overlay
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o.visible[name] = visible
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}
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func (o *Overlays) AddOnBottom(name string, overlay Overlay, visible bool) {
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o.order = append([]string{name}, o.order...)
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o.overlays[name] = overlay
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o.visible[name] = visible
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}
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func (o *Overlays) Arrange(ctx Context, bounds geom.RectangleF32, offset geom.PointF32, parent Control) {
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o.Proxy.Arrange(ctx, bounds, offset, parent)
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for _, overlay := range o.overlays {
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overlay.Arrange(ctx, bounds, offset, parent)
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}
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}
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func (o *Overlays) Handle(ctx Context, e Event) bool {
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for overlay, visible := range o.visible {
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if visible {
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o.overlays[overlay].Handle(ctx, e) // ignore handled state on overlays
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}
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}
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return o.Proxy.Handle(ctx, e)
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}
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func (o *Overlays) Hide(name string) {
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o.visible[name] = false
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}
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func (o *Overlays) Render(ctx Context) {
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o.Proxy.Render(ctx)
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for overlay, visible := range o.visible {
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if visible {
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o.overlays[overlay].Render(ctx)
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}
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}
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}
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func (o *Overlays) Show(name string) {
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o.visible[name] = true
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}
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func (o *Overlays) Toggle(name string) {
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o.visible[name] = !o.visible[name]
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}
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