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package layout
import (
"image"
"image/color"
"image/draw"
"github.com/faiface/gui"
)
// Grid represents a simple grid layout.
// Do not edit properties directly, use the constructor instead.
type Grid struct {
Contents [][]*gui.Env
Background color.Color
Gap int
SplitX func(int, int) []int
SplitY func(int, int) []int
}
func NewGrid(env gui.Env, contents [][]*gui.Env, options ...func(*Grid)) gui.Env {
ret := &Grid{
Background: image.Black,
Gap: 0,
Contents: contents,
SplitX: evenSplit,
SplitY: evenSplit,
}
for _, f := range options {
f(ret)
}
mux, env := NewMux(env, ret)
for _, row := range contents {
for _, item := range row {
*item = mux.MakeEnv()
}
}
return env
}
func GridBackground(c color.Color) func(*Grid) {
return func(grid *Grid) {
grid.Background = c
}
}
func GridGap(g int) func(*Grid) {
return func(grid *Grid) {
grid.Gap = g
}
}
func GridSplitX(split func(int, int) []int) func(*Grid) {
return func(grid *Grid) {
grid.SplitX = split
}
}
func GridSplitY(split func(int, int) []int) func(*Grid) {
return func(grid *Grid) {
grid.SplitY = split
}
}
func (g *Grid) Redraw(drw draw.Image, bounds image.Rectangle) {
draw.Draw(drw, bounds, image.NewUniform(g.Background), image.ZP, draw.Src)
}
func (g *Grid) Lay(bounds image.Rectangle) []image.Rectangle {
gap := g.Gap
ret := make([]image.Rectangle, 0)
rows := len(g.Contents)
rowsH := g.SplitY(rows, bounds.Dy()-(g.Gap*(rows+1)))
X := gap + bounds.Min.X
Y := gap + bounds.Min.Y
for y, row := range g.Contents {
cols := len(row)
h := rowsH[y]
colsW := g.SplitX(cols, bounds.Dx()-(g.Gap*(cols+1)))
X = gap + bounds.Min.X
for x := range row {
w := colsW[x]
ret = append(ret, image.Rect(X, Y, X+w, Y+h))
X += gap + w
}
Y += gap + h
}
return ret
}
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