Ejemplo n.º 1
0
func NewText(text string, font *ui.Font) *Text {
	t := new(Text)
	t.Wrap = true
	t.Text = text
	t.Font = font
	t.layout = ui.NewTextLayout(text, font, 0)
	t.lText = text
	t.lFont = font
	return t
}
Ejemplo n.º 2
0
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()
	}

}
Ejemplo n.º 3
0
func (e *Text) Layout(width float64) (w float64, h float64) {
	if !e.Wrap {
		width = math.MaxFloat64
	}
	if e.Text != e.lText || e.Font != e.lFont {
		e.layout.Free()
		e.layout = ui.NewTextLayout(e.Text, e.Font, width)
		e.lText = e.Text
		e.lFont = e.Font
	} else {
		e.layout.SetWidth(width)
	}
	return e.layout.Extents()
}