func (defaultTreeControlCreator) Create(theme gxui.Theme, control gxui.Control, node *TreeToListNode) gxui.Control {
ll := theme.CreateLinearLayout()
ll.SetDirection(gxui.LeftToRight)
btn := theme.CreateButton()
btn.SetBackgroundBrush(gxui.TransparentBrush)
btn.SetBorderPen(gxui.CreatePen(1, gxui.Gray30))
btn.SetMargin(math.Spacing{L: 2, R: 2, T: 1, B: 1})
btn.OnClick(func(ev gxui.MouseEvent) {
if ev.Button == gxui.MouseButtonLeft {
node.ToggleExpanded()
}
})
update := func() {
btn.SetVisible(!node.IsLeaf())
if node.IsExpanded() {
btn.SetText("-")
} else {
btn.SetText("+")
}
}
update()
gxui.WhileAttached(btn, node.OnChange, update)
ll.AddChild(btn)
ll.AddChild(control)
ll.SetPadding(math.Spacing{L: 16 * node.Depth()})
return ll
}
func (treeControlCreator) Create(theme gxui.Theme, control gxui.Control, node *mixins.TreeToListNode) gxui.Control {
img := theme.CreateImage()
imgSize := math.Size{W: 10, H: 10}
ll := theme.CreateLinearLayout()
ll.SetDirection(gxui.LeftToRight)
btn := theme.CreateButton()
btn.SetBackgroundBrush(gxui.TransparentBrush)
btn.SetBorderPen(gxui.CreatePen(1, gxui.Gray30))
btn.SetMargin(math.Spacing{L: 1, R: 1, T: 1, B: 1})
btn.OnClick(func(ev gxui.MouseEvent) {
if ev.Button == gxui.MouseButtonLeft {
node.ToggleExpanded()
}
})
btn.AddChild(img)
update := func() {
expanded := node.IsExpanded()
canvas := theme.Driver().CreateCanvas(imgSize)
btn.SetVisible(!node.IsLeaf())
switch {
case !btn.IsMouseDown(gxui.MouseButtonLeft) && expanded:
canvas.DrawPolygon(expandedPoly, gxui.TransparentPen, gxui.CreateBrush(gxui.Gray70))
case !btn.IsMouseDown(gxui.MouseButtonLeft) && !expanded:
canvas.DrawPolygon(collapsedPoly, gxui.TransparentPen, gxui.CreateBrush(gxui.Gray70))
case expanded:
canvas.DrawPolygon(expandedPoly, gxui.TransparentPen, gxui.CreateBrush(gxui.Gray30))
case !expanded:
canvas.DrawPolygon(collapsedPoly, gxui.TransparentPen, gxui.CreateBrush(gxui.Gray30))
}
canvas.Complete()
img.SetCanvas(canvas)
}
btn.OnMouseDown(func(gxui.MouseEvent) { update() })
btn.OnMouseUp(func(gxui.MouseEvent) { update() })
update()
gxui.WhileAttached(btn, node.OnChange, update)
ll.AddChild(btn)
ll.AddChild(control)
ll.SetPadding(math.Spacing{L: 16 * node.Depth()})
return ll
}