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package gui
import (
"go.wit.com/lib/widget"
"go.wit.com/log"
)
// Grid numbering examples (H) or (W,H)
// -----------------------
// -- (1) -- (2) -- (3) -- (X)
// -----------------------
//
// (Y)
// ---------
// -- (1) --
// -- (2) --
// ---------
//
// (X,Y)
// -----------------------------
// -- (1,1) -- (2,1) -- (3,1) --
// -- (1,2) -- (2,2) -- (3,2) --
// -- (1,3) -- -- (3,3) --
// -----------------------------
type Grid struct {
Width int
Height int
}
type GridOffset struct {
X int
Y int
}
func (n *Node) NewGrid(progname string, w int, h int) *Node {
newNode := n.newNode(progname, widget.Grid)
newNode.progname = progname
newNode.W = w
newNode.H = h
newNode.NextW = 1
newNode.NextH = 1
// by default, always pad grids
newNode.pad = true
// inform the toolkits
sendAction(newNode, widget.Add)
return newNode
}
// true if the grid already have a child at W,H
func (n *Node) gridCollision() bool {
for _, child := range n.children {
if (child.AtW == n.NextW) && (child.AtH == n.NextH) {
return true
}
}
return false
}
// keeps incrementing NextW & NextH until there is not a widget
func (n *Node) gridIncrement() {
if !n.gridCollision() {
return
}
n.NextW += 1
if n.NextW > n.W {
n.NextW = 1
n.NextH += 1
}
n.gridIncrement()
}
func (n *Node) At(w int, h int) *Node {
if n == nil {
return n
}
n.NextW = w
n.NextH = h
n.gridIncrement()
if (n.NextW != w) || (n.NextH != h) {
log.Warn("At() (W,H)", w, h, " was moved to avoid a collision (W,H) =", n.NextW, n.NextH)
}
return n
}
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