// FillStyle demonstrates the difference between even odd and non zero winding rule.
func FillStyle(gc draw2d.GraphicContext, x, y, width, height float64) {
sx, sy := width/232, height/220
gc.SetLineWidth(width / 40)
draw2dkit.Rectangle(gc, x+sx*0, y+sy*12, x+sx*232, y+sy*70)
var wheel1, wheel2 draw2d.Path
wheel1.ArcTo(x+sx*52, y+sy*70, sx*40, sy*40, 0, 2*math.Pi)
wheel2.ArcTo(x+sx*180, y+sy*70, sx*40, sy*40, 0, -2*math.Pi)
gc.SetFillRule(draw2d.FillRuleEvenOdd)
gc.SetFillColor(color.NRGBA{0, 0xB2, 0, 0xFF})
gc.SetStrokeColor(image.Black)
gc.FillStroke(&wheel1, &wheel2)
draw2dkit.Rectangle(gc, x, y+sy*140, x+sx*232, y+sy*198)
wheel1.Clear()
wheel1.ArcTo(x+sx*52, y+sy*198, sx*40, sy*40, 0, 2*math.Pi)
wheel2.Clear()
wheel2.ArcTo(x+sx*180, y+sy*198, sx*40, sy*40, 0, -2*math.Pi)
gc.SetFillRule(draw2d.FillRuleWinding)
gc.SetFillColor(color.NRGBA{0, 0, 0xE5, 0xFF})
gc.FillStroke(&wheel1, &wheel2)
}
// FillString draws a filled and stroked string.
func FillString(gc draw2d.GraphicContext, x, y, width, height float64) {
sx, sy := width/100, height/100
gc.Save()
gc.SetStrokeColor(image.Black)
gc.SetLineWidth(1)
draw2dkit.RoundedRectangle(gc, x+sx*5, y+sy*5, x+sx*95, y+sy*95, sx*10, sy*10)
gc.FillStroke()
gc.SetFillColor(image.Black)
gc.SetFontSize(height / 6)
gc.Translate(x+sx*6, y+sy*52)
gc.SetFontData(draw2d.FontData{
Name: "luxi",
Family: draw2d.FontFamilyMono,
Style: draw2d.FontStyleBold | draw2d.FontStyleItalic})
w := gc.FillString("Hug")
gc.Translate(w+sx, 0)
left, top, right, bottom := gc.GetStringBounds("cou")
gc.SetStrokeColor(color.NRGBA{255, 0x33, 0x33, 0x80})
draw2dkit.Rectangle(gc, left, top, right, bottom)
gc.SetLineWidth(height / 50)
gc.Stroke()
gc.SetFillColor(color.NRGBA{0x33, 0x33, 0xff, 0xff})
gc.SetStrokeColor(color.NRGBA{0x33, 0x33, 0xff, 0xff})
gc.SetLineWidth(height / 100)
gc.StrokeString("Hug")
gc.Restore()
}
func (h *spaceFillingImage) drawRectange(gc draw2d.GraphicContext, px1, py1, px2, py2 float64) {
gc.SetFillColor(h.BackgroundColor)
gc.SetStrokeColor(h.GridColor)
gc.SetLineWidth(1)
draw2dkit.Rectangle(gc, px1, py1, px2, py2)
gc.FillStroke()
}
// clearRect draws a white rectangle
func clearRect(gc *GraphicContext, x1, y1, x2, y2 float64) {
// save state
f := gc.Current.FillColor
x, y := gc.pdf.GetXY()
// cover page with white rectangle
gc.SetFillColor(white)
draw2dkit.Rectangle(gc, x1, y1, x2, y2)
gc.Fill()
// restore state
gc.SetFillColor(f)
gc.pdf.MoveTo(x, y)
}
// Draw "Hello World"
func DrawHello(gc draw2d.GraphicContext, text string) {
draw2d.SetFontFolder("static")
gc.SetFontData(draw2d.FontData{
Name: "Roboto",
})
gc.SetFontSize(14)
l, t, r, b := gc.GetStringBounds(text)
//log.Println(t, l, r, b)
draw2dkit.Rectangle(gc, 0, 0, r-l+30, b-t+30)
gc.SetFillColor(image.White)
gc.FillStroke()
draw2dkit.Rectangle(gc, 10, 10, r-l+20, b-t+20)
gc.SetFillColor(image.White)
gc.FillStroke()
gc.SetFillColor(color.NRGBA{R: 255, G: 0, B: 0, A: 255})
gc.FillStringAt(text, 15-l, 15-t)
}
// Draw the droid on a certain position.
func Draw(gc draw2d.GraphicContext, x, y float64) {
// set the fill and stroke color of the droid
gc.SetFillColor(color.RGBA{0x44, 0xff, 0x44, 0xff})
gc.SetStrokeColor(color.RGBA{0x44, 0x44, 0x44, 0xff})
// set line properties
gc.SetLineCap(draw2d.RoundCap)
gc.SetLineWidth(5)
// head
gc.MoveTo(x+30, y+70)
gc.ArcTo(x+80, y+70, 50, 50, 180*(math.Pi/180), 180*(math.Pi/180))
gc.Close()
gc.FillStroke()
gc.MoveTo(x+60, y+25)
gc.LineTo(x+50, y+10)
gc.MoveTo(x+100, y+25)
gc.LineTo(x+110, y+10)
gc.Stroke()
// left eye
draw2dkit.Circle(gc, x+60, y+45, 5)
gc.FillStroke()
// right eye
draw2dkit.Circle(gc, x+100, y+45, 5)
gc.FillStroke()
// body
draw2dkit.RoundedRectangle(gc, x+30, y+75, x+30+100, y+75+90, 10, 10)
gc.FillStroke()
draw2dkit.Rectangle(gc, x+30, y+75, x+30+100, y+75+80)
gc.FillStroke()
// left arm
draw2dkit.RoundedRectangle(gc, x+5, y+80, x+5+20, y+80+70, 10, 10)
gc.FillStroke()
// right arm
draw2dkit.RoundedRectangle(gc, x+135, y+80, x+135+20, y+80+70, 10, 10)
gc.FillStroke()
// left leg
draw2dkit.RoundedRectangle(gc, x+50, y+150, x+50+20, y+150+50, 10, 10)
gc.FillStroke()
// right leg
draw2dkit.RoundedRectangle(gc, x+90, y+150, x+90+20, y+150+50, 10, 10)
gc.FillStroke()
}
func (l *BackgroundLayout) Render(ctx *Context, bounds Rect) error {
dw, dh := bounds.Width(), bounds.Height()
if l.Image != "" {
f, err := os.Open(l.Image)
if err != nil {
return err
}
defer f.Close()
src, _, err := image.Decode(f)
if err != nil {
return err
}
if l.Grayscale {
src = &Converted{src, color.GrayModel}
}
sw, sh := float64(src.Bounds().Dx()), float64(src.Bounds().Dy())
scale := math.Max(dw/sw, dh/sh)
ctx.Save()
ctx.Translate(bounds.Left+(dw-sw*scale)/2, bounds.Top+(dh-sh*scale)/2)
ctx.Scale(scale, scale)
ctx.DrawImage(src)
ctx.Restore()
}
if l.Color {
ctx.SetFillColor(ctx.Style.ColorDarkPrimary)
draw2dkit.Rectangle(ctx, bounds.Left, bounds.Top, bounds.Right, bounds.Bottom)
ctx.Fill()
}
return nil
}
//
// Histograms Charts
//
func dailyWordHistChart(filename string, width, height int, days []*stat.DailyUserStat, dateLine []time.Time) {
dest := image.NewRGBA(image.Rect(0, 0, width, height))
gc := draw2dimg.NewGraphicContext(dest)
var minVal, maxVal float64 = 0, 0
dayLen := len(days)
xStep := float64(width) / float64(dayLen)
baseLineY := float64(50)
dayAdd := make([]float64, dayLen)
daySub := make([]float64, dayLen)
for i := 0; i < dayLen; i += 1 {
if days[i] == nil {
dayAdd[i] = 0
daySub[i] = 0
} else {
dayAdd[i] = float64(days[i].WordAdd)
daySub[i] = float64(0 - days[i].WordSub)
if dayAdd[i] > maxVal {
maxVal = dayAdd[i]
}
if daySub[i] > minVal {
minVal = daySub[i]
}
}
}
hf := float64(height)
wf := float64(width)
for i := 0; i < dayLen; i += 1 {
dayAdd[i] = (hf - baseLineY) * dayAdd[i] / maxVal
daySub[i] = (baseLineY) * daySub[i] / minVal
}
// Draw Grid Lines
{
gc.SetFillColor(color.RGBA{0x44, 0x44, 0x44, 0xff})
gc.SetStrokeColor(color.RGBA{0x00, 0x00, 0x00, 0xff})
gc.SetLineWidth(0.2)
yStep := 100.0
if maxVal > 10000 {
yStep = 1000.0
} else if maxVal > 1000 {
yStep = 250.0
}
gc.SetFontData(draw2d.FontData{Name: "Roboto", Family: draw2d.FontFamilySans})
for y := yStep; y < maxVal; y += yStep {
yf := (hf - baseLineY) - (hf-baseLineY)*y/maxVal
gc.MoveTo(0, yf)
gc.LineTo(wf, yf)
gc.Stroke()
gc.FillStringAt(fmt.Sprintf("%.0f", y), 10, yf)
}
yStep = 100.0
if minVal > 10000 {
yStep = 1000.0
} else if minVal > 1000 {
yStep = 250.0
}
for y := yStep; y < minVal; y += yStep {
yf := (hf - baseLineY) + baseLineY*y/minVal
gc.MoveTo(0, yf)
gc.LineTo(wf, yf)
}
gc.Stroke()
}
// Add
gc.SetFillColor(color.RGBA{0x44, 0xff, 0x44, 0xff})
for i := 0; i < dayLen; i += 1 {
x := float64(i) * xStep
draw2dkit.Rectangle(gc, x, hf-baseLineY, x+xStep, hf-baseLineY-dayAdd[i])
}
gc.Fill()
// Sub
gc.SetFillColor(color.RGBA{0xff, 0x44, 0x44, 0xff})
for i := 0; i < dayLen; i += 1 {
x := float64(i) * xStep
draw2dkit.Rectangle(gc, x, hf-baseLineY, x+xStep, hf-baseLineY+daySub[i])
}
gc.Fill()
// Draw Base Line
{
gc.SetStrokeColor(color.RGBA{0x00, 0x00, 0x00, 0xff})
gc.SetLineWidth(1)
gc.MoveTo(0, 0)
gc.LineTo(0, hf)
gc.MoveTo(0, hf-baseLineY)
gc.LineTo(wf, hf-baseLineY)
gc.MoveTo(wf, 0)
gc.LineTo(wf, hf)
for i := 0; i < dayLen; i += 1 {
if dateLine[i].Weekday() == time.Monday {
x := float64(i) * xStep
gc.MoveTo(x, hf-baseLineY-10)
gc.LineTo(x, hf-baseLineY+10)
}
}
gc.Stroke()
}
draw2dimg.SaveToPngFile(filename, dest)
}