tslocum/etk
1
0
Fork 0
Code Issues 3 Pull requests Projects Releases Wiki Activity

Add Frame.SetHorizontal and Frame.SetVertical

Browse source
This commit is contained in:
Trevor Slocum 2024-11-20 10:27:06 -08:00
parent e8f49c5641
commit e4e37cf67e
1 changed files with 47 additions and 6 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

53
frame.go
View file

@ -1,6 +1,8 @@
package etk
import "image"
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.
@ -10,6 +12,8 @@ type Frame struct {
positionChildren bool
maxWidth int
maxHeight int
horizontal Alignment
vertical Alignment
}
// NewFrame returns a new Frame widget.
@ -69,6 +73,24 @@ func (f *Frame) SetMaxHeight(h int) {
f.repositionAll()
}
// SetHorizontal sets the horizontal alignment of widgets within the Frame. This
// will only have an effect when a max width is set and there is extra space.
func (f *Frame) SetHorizontal(h Alignment) {
f.Lock()
defer f.Unlock()
f.horizontal = h
}
// SetVertical sets the vertical alignment ofwidgets within the Frame. This
// will only have an effect when a max height is set and there is extra space.
func (f *Frame) SetVertical(v Alignment) {
f.Lock()
defer f.Unlock()
f.vertical = v
}
// AddChild adds a child to the widget.
func (f *Frame) AddChild(w ...Widget) {
f.Lock()
@ -85,13 +107,32 @@ func (f *Frame) AddChild(w ...Widget) {
}
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
r := f.rect
if f.maxWidth > 0 {
if r.Dx() > f.maxWidth {
r.Max.X = r.Min.X + f.maxWidth
}
if f.horizontal == AlignCenter {
extraSpace := f.rect.Dx() - r.Dx()
if extraSpace > 0 {
r = image.Rectangle{image.Point{f.rect.Min.X + extraSpace/2, r.Min.Y}, image.Point{f.rect.Max.X - extraSpace/2, r.Max.Y}}
}
}
// TODO Handle AlignEnd
}
if f.maxHeight > 0 && r.Dy() > f.maxHeight {
r.Max.Y = r.Min.Y + f.maxHeight
if f.maxHeight > 0 {
if r.Dy() > f.maxHeight {
r.Max.Y = r.Min.Y + f.maxHeight
}
if f.vertical == AlignCenter {
extraSpace := f.rect.Dy() - r.Dy()
if extraSpace > 0 {
r = image.Rectangle{image.Point{r.Min.X, f.rect.Min.Y + extraSpace/2}, image.Point{r.Max.X, f.rect.Max.Y - extraSpace/2}}
}
}
// TODO Handle AlignEnd
}
r = r.Inset(f.padding)
w.SetRect(r)
}