105 lines
2.2 KiB
Go
105 lines
2.2 KiB
Go
package etk
|
|
|
|
import "image"
|
|
|
|
// Frame is a widget container. All children are displayed at once. Children are
|
|
// not repositioned by default. Repositioning may be enabled via SetPositionChildren.
|
|
type Frame struct {
|
|
*Box
|
|
padding int
|
|
positionChildren bool
|
|
maxWidth int
|
|
maxHeight int
|
|
}
|
|
|
|
// NewFrame returns a new Frame widget.
|
|
func NewFrame(w ...Widget) *Frame {
|
|
f := &Frame{
|
|
Box: NewBox(),
|
|
}
|
|
f.AddChild(w...)
|
|
return f
|
|
}
|
|
|
|
// SetPadding sets the amount of padding around widgets in the frame.
|
|
func (f *Frame) SetPadding(padding int) {
|
|
f.Lock()
|
|
defer f.Unlock()
|
|
|
|
f.padding = padding
|
|
f.repositionAll()
|
|
}
|
|
|
|
// SetRect sets the position and size of the widget.
|
|
func (f *Frame) SetRect(r image.Rectangle) {
|
|
f.Lock()
|
|
defer f.Unlock()
|
|
|
|
f.rect = r
|
|
f.repositionAll()
|
|
}
|
|
|
|
// SetPositionChildren sets a flag that determines whether child widgets are
|
|
// repositioned when the Frame is repositioned.
|
|
func (f *Frame) SetPositionChildren(position bool) {
|
|
f.Lock()
|
|
defer f.Unlock()
|
|
|
|
f.positionChildren = position
|
|
f.repositionAll()
|
|
}
|
|
|
|
// SetMaxWidth sets the maximum width of widgets within the frame. This will
|
|
// only have an effect after SetPositionChildren(true) is called. 0 to disable.
|
|
func (f *Frame) SetMaxWidth(w int) {
|
|
f.Lock()
|
|
defer f.Unlock()
|
|
|
|
f.maxWidth = w
|
|
f.repositionAll()
|
|
}
|
|
|
|
// SetMaxHeight sets the maximum height of widgets within the frame. This will
|
|
// only have an effect after SetPositionChildren(true) is called. 0 to disable.
|
|
func (f *Frame) SetMaxHeight(h int) {
|
|
f.Lock()
|
|
defer f.Unlock()
|
|
|
|
f.maxHeight = h
|
|
f.repositionAll()
|
|
}
|
|
|
|
// AddChild adds a child to the widget.
|
|
func (f *Frame) AddChild(w ...Widget) {
|
|
f.Lock()
|
|
defer f.Unlock()
|
|
|
|
f.children = append(f.children, w...)
|
|
|
|
if !f.positionChildren {
|
|
return
|
|
}
|
|
for _, child := range w {
|
|
f.repositionChild(child)
|
|
}
|
|
}
|
|
|
|
func (f *Frame) repositionChild(w Widget) {
|
|
r := f.rect.Inset(f.padding)
|
|
if f.maxWidth > 0 && r.Dx() > f.maxWidth {
|
|
r.Max.X = r.Min.X + f.maxWidth
|
|
}
|
|
if f.maxHeight > 0 && r.Dy() > f.maxHeight {
|
|
r.Max.Y = r.Min.Y + f.maxHeight
|
|
}
|
|
w.SetRect(r)
|
|
}
|
|
|
|
func (f *Frame) repositionAll() {
|
|
if !f.positionChildren {
|
|
return
|
|
}
|
|
for _, w := range f.children {
|
|
f.repositionChild(w)
|
|
}
|
|
}
|