func (r *measureHandler) Draw(a *ui.Area, dp *ui.AreaDrawParams) {
if r.parent.width != dp.AreaWidth {
fmt.Sprintf("Size changed: %v\n", dp.AreaWidth)
r.parent.layout(dp.AreaWidth)
}
//Fill background
p := ui.NewPath(ui.Winding)
p.AddRectangle(0, 0, dp.AreaWidth, dp.AreaHeight)
p.End()
dp.Context.Fill(p, &ui.Brush{
A: 1,
})
}
func (r *drawHandler) Draw(a *ui.Area, dp *ui.AreaDrawParams) {
if r.parent.doc == nil {
return
}
f := r.parent.doc.Fill()
if f == nil {
f = &ui.Brush{A: 1, R: 1, G: 1, B: 1}
}
p := ui.NewPath(ui.Winding)
p.AddRectangle(dp.ClipX, dp.ClipY, dp.ClipWidth, dp.ClipHeight)
p.End()
dp.Context.Fill(p, f)
r.parent.doc.Render(dp, 0, 0)
}
func (g *Group) Render(dp *ui.AreaDrawParams, x, y float64) {
for _, l := range g.layouts {
if b := l.e.Fill(); b != nil {
l.path = ui.NewPath(ui.Winding)
pTop, pRight, pBottom, pLeft := l.e.Padding()
l.path.AddRectangle(x+l.x-pLeft, y+l.y-pTop, l.w+pLeft+pRight, l.h+pTop+pBottom)
l.path.End()
dp.Context.Fill(l.path, l.e.Fill())
if stroke, thickness := l.e.Stroke(); stroke != nil {
dp.Context.Stroke(l.path, stroke, &ui.StrokeParams{Thickness: thickness})
}
}
l.e.Render(dp, x+l.x, y+l.y)
}
}
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()
}
}