func (d *DrawPaint) Init(outer DrawPaintOuter, theme gxui.Theme) {
d.outer = outer
d.driver = theme.Driver()
if debugVerifyDetachOnGC {
runtime.SetFinalizer(d.outer, verifyDetach)
}
}
func (d *DrawPaint) Init(outer DrawPaintOuter, theme gxui.Theme) {
d.outer = outer
d.driver = theme.Driver()
outer.OnDetach(func() {
if d.canvas != nil {
d.canvas.Release()
d.canvas = nil
}
})
if debugVerifyDetachOnGC {
runtime.SetFinalizer(d.outer, verifyDetach)
}
}
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
}
// CreateIcon is create icon control
func CreateIcon(theme gxui.Theme, icon rune, size int) gxui.Label {
if theme == nil || size < 0 {
return nil
}
control := theme.CreateLabel()
font, ok := MaterialIconFonts[size]
if !ok {
var err error
font, err = theme.Driver().CreateFont(MaterialIcon, size)
if err != nil {
return nil
}
MaterialIconFonts[size] = font
}
control.SetFont(font)
control.SetText(string(icon))
return control
}
func (t *Tree) CreateExpandButton(theme gxui.Theme, node *mixins.TreeInternalNode) gxui.Button {
img := theme.CreateImage()
imgSize := math.Size{W: 10, H: 10}
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 {
if node.IsExpanded() {
node.Collapse()
} else {
node.Expand()
}
}
})
btn.AddChild(img)
updateStyle := func() {
canvas := theme.Driver().CreateCanvas(imgSize)
switch {
case !btn.IsMouseDown(gxui.MouseButtonLeft) && node.IsExpanded():
canvas.DrawPolygon(expandedPoly, gxui.TransparentPen, gxui.CreateBrush(gxui.Gray70))
case !btn.IsMouseDown(gxui.MouseButtonLeft) && !node.IsExpanded():
canvas.DrawPolygon(collapsedPoly, gxui.TransparentPen, gxui.CreateBrush(gxui.Gray70))
case node.IsExpanded():
canvas.DrawPolygon(expandedPoly, gxui.TransparentPen, gxui.CreateBrush(gxui.Gray30))
case !node.IsExpanded():
canvas.DrawPolygon(collapsedPoly, gxui.TransparentPen, gxui.CreateBrush(gxui.Gray30))
}
canvas.Complete()
img.SetCanvas(canvas)
}
btn.OnMouseDown(func(gxui.MouseEvent) { updateStyle() })
btn.OnMouseUp(func(gxui.MouseEvent) { updateStyle() })
node.OnExpandedChanged(func(e bool) { updateStyle() })
updateStyle()
return btn
}
func (l *Layoutable) Init(outer LayoutableOuter, theme gxui.Theme) {
l.outer = outer
l.driver = theme.Driver()
}