113 lines
2.7 KiB
Go
113 lines
2.7 KiB
Go
package tview
|
|
|
|
import "github.com/gdamore/tcell"
|
|
|
|
// Configuration values.
|
|
const (
|
|
FlexRow = iota
|
|
FlexColumn
|
|
)
|
|
|
|
// FlexItem holds layout options for one item.
|
|
type FlexItem struct {
|
|
Item Primitive // The item to be positioned.
|
|
FixedSize int // The item's fixed size which may not be changed, 0 if it has no fixed size.
|
|
}
|
|
|
|
// Flex is a basic implementation of a flexbox layout.
|
|
type Flex struct {
|
|
x, y, width, height int // The size and position of this primitive.
|
|
Items []FlexItem // The items to be positioned.
|
|
Direction int // FlexRow or FlexColumn.
|
|
}
|
|
|
|
// NewFlex returns a new flexbox layout container with the given primitives.
|
|
// The items all have no fixed size. If more control is needed, call AddItem().
|
|
// The direction argument must be FlexRow or FlexColumn.
|
|
func NewFlex(direction int, items []Primitive) *Flex {
|
|
box := &Flex{
|
|
width: 15,
|
|
height: 10,
|
|
Direction: direction,
|
|
}
|
|
for _, item := range items {
|
|
box.Items = append(box.Items, FlexItem{Item: item})
|
|
}
|
|
return box
|
|
}
|
|
|
|
// AddItem adds a new item to the container. fixedSize is a size that may not be
|
|
// changed. A value of 0 means that its size may be changed.
|
|
func (f *Flex) AddItem(item Primitive, fixedSize int) *Flex {
|
|
f.Items = append(f.Items, FlexItem{Item: item, FixedSize: fixedSize})
|
|
return f
|
|
}
|
|
|
|
// Draw draws this primitive onto the screen.
|
|
func (f *Flex) Draw(screen tcell.Screen) {
|
|
// Calculate size and position of the items.
|
|
|
|
// How much space can we distribute?
|
|
var variables int
|
|
distSize := f.width
|
|
if f.Direction == FlexRow {
|
|
distSize = f.height
|
|
}
|
|
for _, item := range f.Items {
|
|
if item.FixedSize > 0 {
|
|
distSize -= item.FixedSize
|
|
} else {
|
|
variables++
|
|
}
|
|
}
|
|
|
|
// Calculate positions and draw items.
|
|
pos := f.x
|
|
if f.Direction == FlexRow {
|
|
pos = f.y
|
|
}
|
|
for _, item := range f.Items {
|
|
size := item.FixedSize
|
|
if size <= 0 {
|
|
size = distSize / variables
|
|
distSize -= size
|
|
variables--
|
|
}
|
|
if f.Direction == FlexColumn {
|
|
item.Item.SetRect(pos, f.y, size, f.height)
|
|
} else {
|
|
item.Item.SetRect(f.x, pos, f.width, size)
|
|
}
|
|
pos += size
|
|
|
|
item.Item.Draw(screen)
|
|
}
|
|
}
|
|
|
|
// GetRect returns the current position of the primitive, x, y, width, and
|
|
// height.
|
|
func (f *Flex) GetRect() (int, int, int, int) {
|
|
return f.x, f.y, f.width, f.height
|
|
}
|
|
|
|
// SetRect sets a new position of the primitive.
|
|
func (f *Flex) SetRect(x, y, width, height int) {
|
|
f.x = x
|
|
f.y = y
|
|
f.width = width
|
|
f.height = height
|
|
}
|
|
|
|
// InputHandler returns nil.
|
|
func (f *Flex) InputHandler() func(event *tcell.EventKey) {
|
|
return nil
|
|
}
|
|
|
|
// Focus is called when this primitive receives focus.
|
|
func (f *Flex) Focus(app *Application) {
|
|
}
|
|
|
|
// Blur is called when this primitive loses focus.
|
|
func (f *Flex) Blur() {
|
|
}
|