func (p parseEle) Element() Element {
switch p.Type {
case "Text":
f := &ui.FontDescriptor{
Family: p.FontFamily,
Size: p.FontSize,
}
switch p.FontWeight {
case "Bold":
f.Weight = ui.TextWeightBold
case "Normal", "":
f.Weight = ui.TextWeightNormal
}
base := NewText(p.Text, ui.LoadClosestFont(f))
base.ElementBase = parseElementBase(p)
return base
case "Group":
children := make([]Element, len(p.Children))
for i, child := range p.Children {
children[i] = child.Element()
}
base := NewGroup(children)
base.ElementBase = parseElementBase(p)
return base
default:
panic(fmt.Errorf("Unknown Type %v", p.Type))
}
}
func (a HistogramAreaHandler) Draw(area *ui.Area, dp *ui.AreaDrawParams) {
fntNum := ui.LoadClosestFont(&ui.FontDescriptor{Family: "Droid Sans", Size: 10, Weight: ui.TextWeightBold})
fntVolume := ui.LoadClosestFont(&ui.FontDescriptor{Family: "Droid Sans", Size: 12, Italic: ui.TextItalicItalic})
brush := &ui.Brush{Type: ui.Solid, R: 0.1, G: 0.5, B: 0.7, A: 1}
columnWidth := dp.AreaWidth / float64(len(a.Data))
barWidth := columnWidth * 0.8
for i, volume := range a.Data {
x1 := (float64(i) + 0.1) * columnWidth
x2 := x1 + barWidth
y1 := dp.AreaHeight - 16
y2 := y1 - (dp.AreaHeight-32.0)*float64(volume)/100.0
layoutNum := ui.NewTextLayout(strconv.Itoa(i), fntNum, columnWidth)
w1, _ := layoutNum.Extents()
dp.Context.Text(x1+(barWidth-w1)/2, y1, layoutNum)
layoutVolume := ui.NewTextLayout(strconv.Itoa(volume), fntVolume, columnWidth)
w2, h2 := layoutVolume.Extents()
dp.Context.Text(x1+(barWidth-w2)/2, y2-h2, layoutVolume)
dp.Context.Save()
p := ui.NewPath(ui.Winding)
p.NewFigure(x1, y1)
p.LineTo(x2, y1)
p.LineTo(x2, y2)
p.LineTo(x1, y2)
p.CloseFigure()
p.End()
dp.Context.Fill(p, brush)
dp.Context.Restore()
}
}
func main() {
file, err := os.Open("document.json")
if err != nil {
panic(err)
}
defer file.Close()
buffer := new(bytes.Buffer)
_, err = buffer.ReadFrom(file)
if err != nil {
panic(err)
}
var document uidoc.Element
err = ui.Main(func() {
document, err = uidoc.Parse(buffer.Bytes())
if err != nil {
panic(err)
}
font := ui.LoadClosestFont(&ui.FontDescriptor{
Family: "Deja Vu",
Size: 12,
})
name := ui.NewEntry()
button := ui.NewButton("Greet")
doc := uidoc.New()
doc.SetDocument(document)
box := ui.NewVerticalBox()
box.Append(ui.NewLabel("Enter your name:"), false)
box.Append(name, false)
box.Append(button, false)
box.Append(doc, true)
window := ui.NewWindow("Hello", 400, 700, false)
window.SetChild(box)
button.OnClicked(func(*ui.Button) {
element := uidoc.NewText("Hello, "+name.Text()+"!", font)
document.(*uidoc.Group).Append(element)
doc.Layout()
})
window.OnClosing(func(*ui.Window) bool {
ui.Quit()
return true
})
window.Show()
})
if err != nil {
panic(err)
}
}