andlabs: now attempt grid placement

Signed-off-by: Jeff Carr <jcarr@wit.com>

grid.go

@@ -42,23 +42,28 @@ func (n *Node) NewGrid(name string, w int, h int) *Node {
 }
 
 // true if the grid already have a child at W,H
-func (n *Node) gridCollision(w int, h int) bool {
+func (n *Node) gridCollision() bool {
 	for _, child := range n.children {
-		if ((child.AtW == w) && (child.AtH == h)) {
+		if ((child.AtW == n.NextW) && (child.AtH == n.NextH)) {
 			return true
 		}
 	}
 	return false
 }
 
-// increments NextW & NextH
-func (n *Node) gridIncrement(w int, h int) bool {
-	for _, child := range n.children {
-		if ((child.AtW == w) && (child.AtH == h)) {
-			return true
-		}
+// keeps incrementing NextW & NextH until there is not a widget
+func (n *Node) gridIncrement() {
+	if ! n.gridCollision() {
+		return
 	}
-	return false
+
+	n.NextH += 1
+	if (n.NextH > n.Y) {
+		n.NextW += 1
+		n.NextH = 1
+	}
+
+	n.gridIncrement()
 }
 
 func (n *Node) At(w int, h int) *Node {
@@ -69,9 +74,9 @@ func (n *Node) At(w int, h int) *Node {
 	n.NextW = w
 	n.NextH = h
 
-	// TODO: check for a collision here
-	if n.gridCollision(w,h) {
-		// TODO: find free next w,h
+	n.gridIncrement()
+	if (n.NextW != w) || (n.NextH != h) {
+		log(logError, "At() (W,H)", w, h, " was moved to avoid a collision (W,H) =", n.NextW, n.NextH)
 	}
 	return n
 }

node.go

@@ -12,6 +12,12 @@ func (n *Node) newNode(title string, t toolkit.WidgetType, custom func()) *Node
 	newN.WidgetType = t
 	newN.Custom = custom
 
+	if n.WidgetType == toolkit.Grid {
+		n.gridIncrement()
+	}
+	newN.AtW = n.NextW
+	newN.AtH = n.NextH
+
 	n.children = append(n.children, newN)
 	newN.parent = n
 	return newN

plugin.go

@@ -212,6 +212,9 @@ func newAction(n *Node, atype toolkit.ActionType) *toolkit.Action {
 	a.Name = n.Name
 	a.Text = n.Text
 	a.WidgetId = n.id
+	if (n.parent != nil) {
+		a.ParentId = n.parent.id
+	}
 	a.WidgetType = n.WidgetType
 
 	return &a
@@ -233,7 +236,7 @@ func newaction(a *toolkit.Action, n *Node, where *Node) {
 	if (where != nil) {
 		a.ParentId = where.id
 		if (where.WidgetType == toolkit.Grid) {
-			placeGrid(a, n, where)
+			n.gridIncrement()
 		}
 	}
 

tab.go

@@ -22,8 +22,8 @@ func (n *Node) NewTab(text string) *Node {
 		log(logError, "NewTab() parent =", n.parent)
 		if (n.parent.WidgetType == toolkit.Root) {
 			// also broken
-			log(logError, "NewTab() TODO: make a window here", n)
-			panic("NewTab did not get passed a window")
+			log(logError, "NewTab() TODO: make or find a window here", n)
+			panic("NewTab() did not get passed a window")
 		}
 		// go up the binary tree until we find a window widget to add a tab too
 		return n.parent.NewTab(text)

toolkit/widget.go

@@ -38,6 +38,10 @@ type Action struct {
 	X      int
 	Y      int
 
+	// This is used for the widget's grid position
+	W      int
+	H      int
+
 	// Put space around elements to improve look & feel
 	Margin	bool