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// Copyright 2019-2022 Graham Clark. All rights reserved. Use of this source
// code is governed by the MIT license that can be found in the LICENSE
// file.
// Package expander provides a widget that renders in one line when not in focus
// but that may render using more than one line when in focus. This is useful for
// showing an item in full when needed, but otherwise saving screen real-estate.
package expander
import (
"fmt"
"github.com/gcla/gowid"
"github.com/gcla/gowid/widgets/boxadapter"
)
//======================================================================
// Widget will render in one row when not selected, and then using
// however many rows required when selected.
type Widget struct {
orig gowid.IWidget
w *boxadapter.Widget
}
var _ gowid.IWidget = (*Widget)(nil)
var _ gowid.IComposite = (*Widget)(nil)
func New(w gowid.IWidget) *Widget {
b := boxadapter.New(w, 1)
return &Widget{w, b}
}
func (w *Widget) SubWidget() gowid.IWidget {
return w.orig
}
func (w *Widget) RenderSize(size gowid.IRenderSize, focus gowid.Selector, app gowid.IApp) gowid.IRenderBox {
if focus.Selected {
return gowid.RenderSize(w.orig, size, focus, app)
} else {
return gowid.RenderSize(w.w, size, focus, app)
}
}
func (w *Widget) Render(size gowid.IRenderSize, focus gowid.Selector, app gowid.IApp) gowid.ICanvas {
if focus.Selected {
return w.orig.Render(size, focus, app)
} else {
return w.w.Render(size, focus, app)
}
}
func (w *Widget) UserInput(ev interface{}, size gowid.IRenderSize, focus gowid.Selector, app gowid.IApp) bool {
if focus.Selected {
return w.orig.UserInput(ev, size, focus, app)
} else {
return w.w.UserInput(ev, size, focus, app)
}
}
func (w *Widget) Selectable() bool {
return w.w.Selectable()
}
func (w *Widget) String() string {
return fmt.Sprintf("expander[%v]", w.w.IWidget)
}
//======================================================================
// Local Variables:
// mode: Go
// fill-column: 110
// End:
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