func drawCaps(ctx *nanovgo.Context, x, y, width float32) {
caps := []nanovgo.LineCap{nanovgo.Butt, nanovgo.Round, nanovgo.Square}
var lineWidth float32 = 8.0
ctx.Save()
defer ctx.Restore()
ctx.BeginPath()
ctx.Rect(x-lineWidth/2, y, width+lineWidth, 40)
ctx.SetFillColor(nanovgo.RGBA(255, 255, 255, 32))
ctx.Fill()
ctx.BeginPath()
ctx.Rect(x, y, width, 40)
ctx.SetFillColor(nanovgo.RGBA(255, 255, 255, 32))
ctx.Fill()
ctx.SetStrokeWidth(lineWidth)
for i, cap := range caps {
ctx.SetLineCap(cap)
ctx.SetStrokeColor(nanovgo.RGBA(0, 0, 0, 255))
ctx.BeginPath()
ctx.MoveTo(x, y+float32(i)*10+5)
ctx.LineTo(x+width, y+float32(i)*10+5)
ctx.Stroke()
}
}
func (sf *SpinnerFilter) Draw(self nanogui.Widget, ctx *nanovgo.Context) {
if sf.isActive() {
var py int
fw, fh := sf.Parent().Size()
if window, ok := sf.Parent().(*nanogui.Window); ok {
hh := window.Theme().WindowHeaderHeight
py += hh
fh -= hh
}
sf.SetPosition(0, py)
sf.SetSize(fw, fh)
currentTime := nanogui.GetTime() - sf.startTime
var alpha float32
var showSpinner bool
if sf.state == SpinnerFadeIn {
if currentTime > 1 {
alpha = 0.7
showSpinner = true
} else {
alpha = currentTime * 0.7
}
} else {
if currentTime > 1 {
alpha = 0.7
} else {
alpha = (1.0 - currentTime) * 0.7
}
}
ctx.Save()
ctx.BeginPath()
ctx.SetFillColor(nanovgo.MONOf(0, alpha))
ctx.Rect(0, float32(py), float32(fw), float32(fh))
ctx.Fill()
if showSpinner {
cx := float32(fw / 2)
cy := float32(py + fh/2)
rotation := 2 * math.Pi * float64(currentTime*float32(sf.speed)*float32(sf.num)) / float64(sf.num)
dr := float64(2 * math.Pi / float64(sf.num))
ctx.SetStrokeWidth(sf.lineWidth)
for i := 0; i < sf.num; i++ {
ctx.BeginPath()
ctx.MoveTo(cx+float32(math.Cos(rotation))*sf.c1, cy+float32(math.Sin(rotation))*sf.c1)
ctx.LineTo(cx+float32(math.Cos(rotation))*sf.c2, cy+float32(math.Sin(rotation))*sf.c2)
ctx.SetStrokeColor(nanovgo.MONOf(1.0, float32(i)/float32(sf.num)))
ctx.Stroke()
rotation += dr
}
}
ctx.Restore()
} else {
sf.SetSize(0, 0)
sf.SetVisible(false)
return
}
}
func (g *Graph) Draw(self Widget, ctx *nanovgo.Context) {
g.WidgetImplement.Draw(self, ctx)
x := float32(g.x)
y := float32(g.y)
w := float32(g.w)
h := float32(g.h)
ctx.BeginPath()
ctx.Rect(x, y, w, h)
ctx.SetFillColor(g.backgroundColor)
ctx.Fill()
if len(g.values) < 2 {
return
}
ctx.BeginPath()
ctx.MoveTo(x, y+h)
dx := float32(len(g.values) - 1)
for i, v := range g.values {
vx := x + float32(i)*w/dx
vy := y + (1.0-v)*h
ctx.LineTo(vx, vy)
}
ctx.LineTo(x+w, y+h)
ctx.SetStrokeColor(nanovgo.MONO(100, 255))
ctx.Stroke()
ctx.SetFillColor(g.foregroundColor)
ctx.Fill()
ctx.SetFontFace(g.theme.FontNormal)
ctx.SetFillColor(g.textColor)
if g.caption != "" {
ctx.SetFontSize(14)
ctx.SetTextAlign(nanovgo.AlignLeft | nanovgo.AlignTop)
ctx.Text(x+3, y+1, g.caption)
}
if g.header != "" {
ctx.SetFontSize(18)
ctx.SetTextAlign(nanovgo.AlignRight | nanovgo.AlignTop)
ctx.Text(x+w-3, y+1, g.header)
}
if g.footer != "" {
ctx.SetFontSize(15)
ctx.SetTextAlign(nanovgo.AlignRight | nanovgo.AlignBottom)
ctx.Text(x+w-3, y+h-1, g.footer)
}
ctx.BeginPath()
ctx.Rect(x, y, w, h)
ctx.SetStrokeColor(nanovgo.MONO(100, 255))
ctx.Stroke()
}
func drawWindow(ctx *nanovgo.Context, title string, x, y, w, h float32) {
var cornerRadius float32 = 3.0
ctx.Save()
defer ctx.Restore()
// ctx.Reset();
// Window
ctx.BeginPath()
ctx.RoundedRect(x, y, w, h, cornerRadius)
ctx.SetFillColor(nanovgo.RGBA(28, 30, 34, 192))
// ctx.FillColor(nanovgo.RGBA(0,0,0,128));
ctx.Fill()
// Drop shadow
shadowPaint := nanovgo.BoxGradient(x, y+2, w, h, cornerRadius*2, 10, nanovgo.RGBA(0, 0, 0, 128), nanovgo.RGBA(0, 0, 0, 0))
ctx.BeginPath()
ctx.Rect(x-10, y-10, w+20, h+30)
ctx.RoundedRect(x, y, w, h, cornerRadius)
ctx.PathWinding(nanovgo.Hole)
ctx.SetFillPaint(shadowPaint)
ctx.Fill()
// Header
headerPaint := nanovgo.LinearGradient(x, y, x, y+15, nanovgo.RGBA(255, 255, 255, 8), nanovgo.RGBA(0, 0, 0, 16))
ctx.BeginPath()
ctx.RoundedRect(x+1, y+1, w-2, 30, cornerRadius-1)
ctx.SetFillPaint(headerPaint)
ctx.Fill()
ctx.BeginPath()
ctx.MoveTo(x+0.5, y+0.5+30)
ctx.LineTo(x+0.5+w-1, y+0.5+30)
ctx.SetStrokeColor(nanovgo.RGBA(0, 0, 0, 32))
ctx.Stroke()
ctx.SetFontSize(18.0)
ctx.SetFontFace("sans-bold")
ctx.SetTextAlign(nanovgo.AlignCenter | nanovgo.AlignMiddle)
ctx.SetFontBlur(2)
ctx.SetFillColor(nanovgo.RGBA(0, 0, 0, 128))
ctx.Text(x+w/2, y+16+1, title)
ctx.SetFontBlur(0)
ctx.SetFillColor(nanovgo.RGBA(220, 220, 220, 160))
ctx.Text(x+w/2, y+16, title)
}
func (i *ImagePanel) Draw(self Widget, ctx *nanovgo.Context) {
cols, _ := i.gridSize()
x := float32(i.x)
y := float32(i.y)
thumbSize := float32(i.thumbSize)
for j, image := range i.images {
pX := x + float32(i.margin+(j%cols)*(i.thumbSize+i.spacing))
pY := y + float32(i.margin+(j/cols)*(i.thumbSize+i.spacing))
imgW, imgH, _ := ctx.ImageSize(image.ImageID)
var iw, ih, ix, iy float32
if imgW < imgH {
iw = thumbSize
ih = iw * float32(imgH) / float32(imgW)
ix = 0
iy = -(ih - thumbSize) * 0.5
} else {
ih = thumbSize
iw = ih * float32(imgH) / float32(imgW)
iy = 0
ix = -(iw - thumbSize) * 0.5
}
imgPaint := nanovgo.ImagePattern(pX+ix, pY+iy, iw, ih, 0, image.ImageID, toF(i.mouseIndex == j, 1.0, 0.7))
ctx.BeginPath()
ctx.RoundedRect(pX, pY, thumbSize, thumbSize, 5)
ctx.SetFillPaint(imgPaint)
ctx.Fill()
shadowPaint := nanovgo.BoxGradient(pX-1, pY, thumbSize+2, thumbSize+2, 5, 3, nanovgo.MONO(0, 128), nanovgo.MONO(0, 0))
ctx.BeginPath()
ctx.Rect(pX-5, pY-5, thumbSize+10, thumbSize+10)
ctx.RoundedRect(pX, pY, thumbSize, thumbSize, 6)
ctx.PathWinding(nanovgo.Hole)
ctx.SetFillPaint(shadowPaint)
ctx.Fill()
ctx.BeginPath()
ctx.RoundedRect(pX+0.5, pY+0.5, thumbSize-1, thumbSize-1, 4-0.5)
ctx.SetStrokeWidth(1.0)
ctx.SetStrokeColor(nanovgo.MONO(255, 80))
ctx.Stroke()
}
}
// RenderGraph shows graph
func (pg *PerfGraph) RenderGraph(ctx *nanovgo.Context, x, y float32) {
avg := pg.GetGraphAverage()
var w float32 = 200
var h float32 = 35
ctx.BeginPath()
ctx.Rect(x, y, w, h)
ctx.SetFillColor(backgroundColor)
ctx.Fill()
ctx.BeginPath()
ctx.MoveTo(x, y+h)
for i := 0; i < nvgGraphHistoryCount; i++ {
v := float32(1.0) / float32(0.00001+pg.values[(pg.head+i)%nvgGraphHistoryCount])
if v > 80.0 {
v = 80.0
}
vx := x + float32(i)/float32(nvgGraphHistoryCount-1)*w
vy := y + h - ((v / 80.0) * h)
ctx.LineTo(vx, vy)
}
ctx.LineTo(x+w, y+h)
ctx.SetFillColor(graphColor)
ctx.Fill()
ctx.SetFontFace(pg.fontFace)
if len(pg.name) > 0 {
ctx.SetFontSize(14.0)
ctx.SetTextAlign(nanovgo.AlignLeft | nanovgo.AlignTop)
ctx.SetFillColor(titleTextColor)
ctx.Text(x+3, y+1, pg.name)
}
ctx.SetFontSize(18.0)
ctx.SetTextAlign(nanovgo.AlignRight | nanovgo.AlignTop)
ctx.SetFillColor(fpsTextColor)
ctx.Text(x+w-3, y+1, fmt.Sprintf("%.2f FPS", 1.0/avg))
ctx.SetFontSize(15.0)
ctx.SetTextAlign(nanovgo.AlignRight | nanovgo.AlignBottom)
ctx.SetFillColor(averageTextColor)
ctx.Text(x+w-3, y+h+1, fmt.Sprintf("%.2f ms", avg*1000.0))
}
func (i *ImageView) Draw(self Widget, ctx *nanovgo.Context) {
if i.image == 0 {
return
}
x := float32(i.x)
y := float32(i.y)
ow := float32(i.w)
oh := float32(i.h)
var w, h float32
{
iw, ih, _ := ctx.ImageSize(i.image)
w = float32(iw)
h = float32(ih)
}
if i.policy == ImageSizePolicyFixed {
if ow < w {
h = float32(int(h * ow / w))
w = ow
}
if oh < h {
w = float32(int(w * oh / h))
h = oh
}
} else { // mPolicy == Expand
// expand to width
h = float32(int(h * ow / w))
w = ow
// shrink to height, if necessary
if oh < h {
w = float32(int(w * oh / h))
h = oh
}
}
imgPaint := nanovgo.ImagePattern(x, y, w, h, 0, i.image, 1.0)
ctx.BeginPath()
ctx.Rect(x, y, w, h)
ctx.SetFillPaint(imgPaint)
ctx.Fill()
}
// Draw() draws the widget (and all child widgets)
func (w *WidgetImplement) Draw(self Widget, ctx *nanovgo.Context) {
if debugFlag {
ctx.SetStrokeWidth(1.0)
ctx.BeginPath()
ctx.Rect(float32(w.x)-0.5, float32(w.y)-0.5, float32(w.w)+1.0, float32(w.h)+1.0)
ctx.SetStrokeColor(nanovgo.RGBA(255, 0, 0, 255))
ctx.Stroke()
}
if len(w.children) == 0 {
return
}
ctx.Translate(float32(w.x), float32(w.y))
// draw depth 0 items
var drawLater widgetsAsc = make([]Widget, 0, len(w.children))
for _, child := range w.children {
if child.Visible() {
depth := child.Depth()
if depth == 0 {
cx, cy := child.Position()
cw, ch := child.Size()
if !self.IsClipped(cx, cy, cw, ch) {
child.Draw(child, ctx)
}
} else {
drawLater = append(drawLater, child)
}
}
}
// draw by depth order
sort.Sort(drawLater)
for _, child := range drawLater {
cx, cy := child.Position()
cw, ch := child.Size()
if !self.IsClipped(cx, cy, cw, ch) {
child.Draw(child, ctx)
}
}
ctx.Translate(-float32(w.x), -float32(w.y))
}
func drawScissor(ctx *nanovgo.Context, x, y, t float32) {
ctx.Save()
// Draw first rect and set scissor to it's area.
ctx.Translate(x, y)
ctx.Rotate(nanovgo.DegToRad(5))
ctx.BeginPath()
ctx.Rect(-20, -20, 60, 40)
ctx.SetFillColor(nanovgo.RGBA(255, 0, 0, 255))
ctx.Fill()
ctx.Scissor(-20, -20, 60, 40)
// Draw second rectangle with offset and rotation.
ctx.Translate(40, 0)
ctx.Rotate(t)
// Draw the intended second rectangle without any scissoring.
ctx.Save()
ctx.ResetScissor()
ctx.BeginPath()
ctx.Rect(-20, -10, 60, 30)
ctx.SetFillColor(nanovgo.RGBA(255, 128, 0, 64))
ctx.Fill()
ctx.Restore()
// Draw second rectangle with combined scissoring.
ctx.IntersectScissor(-20, -10, 60, 30)
ctx.BeginPath()
ctx.Rect(-20, -10, 60, 30)
ctx.SetFillColor(nanovgo.RGBA(255, 128, 0, 255))
ctx.Fill()
ctx.Restore()
}
func (p *Popup) Draw(self Widget, ctx *nanovgo.Context) {
p.RefreshRelativePlacement()
if !p.visible {
return
}
ds := float32(p.theme.WindowDropShadowSize)
cr := float32(p.theme.WindowCornerRadius)
px := float32(p.x)
py := float32(p.y)
pw := float32(p.w)
ph := float32(p.h)
ah := float32(p.anchorHeight)
/* Draw a drop shadow */
shadowPaint := nanovgo.BoxGradient(px, py, pw, ph, cr*2, ds*2, p.theme.DropShadow, p.theme.Transparent)
ctx.BeginPath()
ctx.Rect(px-ds, py-ds, pw+ds*2, ph+ds*2)
ctx.RoundedRect(px, py, pw, ph, cr)
ctx.PathWinding(nanovgo.Hole)
ctx.SetFillPaint(shadowPaint)
ctx.Fill()
/* Draw window */
ctx.BeginPath()
ctx.RoundedRect(px, py, pw, ph, cr)
ctx.MoveTo(px-15, py+ah)
ctx.LineTo(px+1, py+ah-15)
ctx.LineTo(px+1, py+ah+15)
ctx.SetFillColor(p.theme.WindowPopup)
ctx.Fill()
p.WidgetImplement.Draw(self, ctx)
}
func drawSlider(ctx *nanovgo.Context, pos, x, y, w, h float32) {
cy := y + float32(int(h*0.5))
kr := float32(int(h * 0.25))
ctx.Save()
defer ctx.Restore()
// ctx.ClearState(vg);
// Slot
bg := nanovgo.BoxGradient(x, cy-2+1, w, 4, 2, 2, nanovgo.RGBA(0, 0, 0, 32), nanovgo.RGBA(0, 0, 0, 128))
ctx.BeginPath()
ctx.RoundedRect(x, cy-2, w, 4, 2)
ctx.SetFillPaint(bg)
ctx.Fill()
// Knob Shadow
bg = nanovgo.RadialGradient(x+float32(int(pos*w)), cy+1, kr-3, kr+3, nanovgo.RGBA(0, 0, 0, 64), nanovgo.RGBA(0, 0, 0, 0))
ctx.BeginPath()
ctx.Rect(x+float32(int(pos*w))-kr-5, cy-kr-5, kr*2+5+5, kr*2+5+5+3)
ctx.Circle(x+float32(int(pos*w)), cy, kr)
ctx.PathWinding(nanovgo.Hole)
ctx.SetFillPaint(bg)
ctx.Fill()
// Knob
knob := nanovgo.LinearGradient(x, cy-kr, x, cy+kr, nanovgo.RGBA(255, 255, 255, 16), nanovgo.RGBA(0, 0, 0, 16))
ctx.BeginPath()
ctx.Circle(x+float32(int(pos*w)), cy, kr-1)
ctx.SetFillColor(nanovgo.RGBA(40, 43, 48, 255))
ctx.Fill()
ctx.SetFillPaint(knob)
ctx.Fill()
ctx.BeginPath()
ctx.Circle(x+float32(int(pos*w)), cy, kr-0.5)
ctx.SetStrokeColor(nanovgo.RGBA(0, 0, 0, 92))
ctx.Stroke()
}
func drawParagraph(ctx *nanovgo.Context, x, y, width, height, mx, my float32) {
text := "This is longer chunk of text.\n \n Would have used lorem ipsum but she was busy jumping over the lazy dog with the fox and all the men who came to the aid of the party."
ctx.Save()
defer ctx.Restore()
ctx.SetFontSize(18.0)
ctx.SetFontFace("sans")
ctx.SetTextAlign(nanovgo.AlignLeft | nanovgo.AlignTop)
_, _, lineh := ctx.TextMetrics()
// The text break API can be used to fill a large buffer of rows,
// or to iterate over the text just few lines (or just one) at a time.
// The "next" variable of the last returned item tells where to continue.
runes := []rune(text)
var gx, gy float32
var gutter int
lnum := 0
for _, row := range ctx.TextBreakLinesRune(runes, width) {
hit := mx > x && mx < (x+width) && my >= y && my < (y+lineh)
ctx.BeginPath()
var alpha uint8
if hit {
alpha = 64
} else {
alpha = 16
}
ctx.SetFillColor(nanovgo.RGBA(255, 255, 255, alpha))
ctx.Rect(x, y, row.Width, lineh)
ctx.Fill()
ctx.SetFillColor(nanovgo.RGBA(255, 255, 255, 255))
ctx.TextRune(x, y, runes[row.StartIndex:row.EndIndex])
if hit {
var caretX float32
if mx < x+row.Width/2 {
caretX = x
} else {
caretX = x + row.Width
}
px := x
lineRune := runes[row.StartIndex:row.EndIndex]
glyphs := ctx.TextGlyphPositionsRune(x, y, lineRune)
for j, glyph := range glyphs {
x0 := glyph.X
var x1 float32
if j+1 < len(glyphs) {
x1 = glyphs[j+1].X
} else {
x1 = x + row.Width
}
gx = x0*0.3 + x1*0.7
if mx >= px && mx < gx {
caretX = glyph.X
}
px = gx
}
ctx.BeginPath()
ctx.SetFillColor(nanovgo.RGBA(255, 192, 0, 255))
ctx.Rect(caretX, y, 1, lineh)
ctx.Fill()
gutter = lnum + 1
gx = x - 10
gy = y + lineh/2
}
lnum++
y += lineh
}
if gutter > 0 {
txt := strconv.Itoa(gutter)
ctx.SetFontSize(13.0)
ctx.SetTextAlign(nanovgo.AlignRight | nanovgo.AlignMiddle)
_, bounds := ctx.TextBounds(gx, gy, txt)
ctx.BeginPath()
ctx.SetFillColor(nanovgo.RGBA(255, 192, 0, 255))
ctx.RoundedRect(
float32(int(bounds[0]-4)),
float32(int(bounds[1]-2)),
float32(int(bounds[2]-bounds[0])+8),
float32(int(bounds[3]-bounds[1])+4),
float32(int(bounds[3]-bounds[1])+4)/2.0-1.0)
ctx.Fill()
ctx.SetFillColor(nanovgo.RGBA(32, 32, 32, 255))
ctx.Text(gx, gy, txt)
}
y += 20.0
ctx.SetFontSize(13.0)
ctx.SetTextAlign(nanovgo.AlignLeft | nanovgo.AlignTop)
ctx.SetTextLineHeight(1.2)
bounds := ctx.TextBoxBounds(x, y, 150, "Hover your mouse over the text to see calculated caret position.")
// Fade the tooltip out when close to it.
gx = absF((mx - (bounds[0]+bounds[2])*0.5) / (bounds[0] - bounds[2]))
gy = absF((my - (bounds[1]+bounds[3])*0.5) / (bounds[1] - bounds[3]))
a := maxF(gx, gy) - 0.5
a = clampF(a, 0, 1)
ctx.SetGlobalAlpha(a)
ctx.BeginPath()
ctx.SetFillColor(nanovgo.RGBA(220, 220, 220, 255))
ctx.RoundedRect(bounds[0]-2, bounds[1]-2, float32(int(bounds[2]-bounds[0])+4), float32(int(bounds[3]-bounds[1])+4), 3)
px := float32(int((bounds[2] + bounds[0]) / 2))
ctx.MoveTo(px, bounds[1]-10)
ctx.LineTo(px+7, bounds[1]+1)
ctx.LineTo(px-7, bounds[1]+1)
ctx.Fill()
ctx.SetFillColor(nanovgo.RGBA(0, 0, 0, 220))
ctx.TextBox(x, y, 150, "Hover your mouse over the text to see calculated caret position.")
}
func drawColorWheel(ctx *nanovgo.Context, x, y, w, h, t float32) {
var r0, r1, ax, ay, bx, by, aeps, r float32
hue := sinF(t * 0.12)
ctx.Save()
defer ctx.Restore()
/* ctx.BeginPath()
ctx.Rect(x,y,w,h)
ctx.FillColor(nanovgo.RGBA(255,0,0,128))
ctx.Fill()*/
cx := x + w*0.5
cy := y + h*0.5
if w < h {
r1 = w*0.5 - 5.0
} else {
r1 = h*0.5 - 5.0
}
r0 = r1 - 20.0
aeps = 0.5 / r1 // half a pixel arc length in radians (2pi cancels out).
for i := 0; i < 6; i++ {
a0 := float32(i)/6.0*nanovgo.PI*2.0 - aeps
a1 := float32(i+1.0)/6.0*nanovgo.PI*2.0 + aeps
ctx.BeginPath()
ctx.Arc(cx, cy, r0, a0, a1, nanovgo.Clockwise)
ctx.Arc(cx, cy, r1, a1, a0, nanovgo.CounterClockwise)
ctx.ClosePath()
ax = cx + cosF(a0)*(r0+r1)*0.5
ay = cy + sinF(a0)*(r0+r1)*0.5
bx = cx + cosF(a1)*(r0+r1)*0.5
by = cy + sinF(a1)*(r0+r1)*0.5
paint := nanovgo.LinearGradient(ax, ay, bx, by, nanovgo.HSLA(a0/(nanovgo.PI*2), 1.0, 0.55, 255), nanovgo.HSLA(a1/(nanovgo.PI*2), 1.0, 0.55, 255))
ctx.SetFillPaint(paint)
ctx.Fill()
}
ctx.BeginPath()
ctx.Circle(cx, cy, r0-0.5)
ctx.Circle(cx, cy, r1+0.5)
ctx.SetStrokeColor(nanovgo.RGBA(0, 0, 0, 64))
ctx.SetStrokeWidth(1.0)
ctx.Stroke()
// Selector
ctx.Translate(cx, cy)
ctx.Rotate(hue * nanovgo.PI * 2)
// Marker on
ctx.SetStrokeWidth(2.0)
ctx.BeginPath()
ctx.Rect(r0-1, -3, r1-r0+2, 6)
ctx.SetStrokeColor(nanovgo.RGBA(255, 255, 255, 192))
ctx.Stroke()
paint := nanovgo.BoxGradient(r0-3, -5, r1-r0+6, 10, 2, 4, nanovgo.RGBA(0, 0, 0, 128), nanovgo.RGBA(0, 0, 0, 0))
ctx.BeginPath()
ctx.Rect(r0-2-10, -4-10, r1-r0+4+20, 8+20)
ctx.Rect(r0-2, -4, r1-r0+4, 8)
ctx.PathWinding(nanovgo.Hole)
ctx.SetFillPaint(paint)
ctx.Fill()
// Center triangle
r = r0 - 6
ax = cosF(120.0/180.0*nanovgo.PI) * r
ay = sinF(120.0/180.0*nanovgo.PI) * r
bx = cosF(-120.0/180.0*nanovgo.PI) * r
by = sinF(-120.0/180.0*nanovgo.PI) * r
ctx.BeginPath()
ctx.MoveTo(r, 0)
ctx.LineTo(ax, ay)
ctx.LineTo(bx, by)
ctx.ClosePath()
paint = nanovgo.LinearGradient(r, 0, ax, ay, nanovgo.HSLA(hue, 1.0, 0.5, 255), nanovgo.RGBA(255, 255, 255, 255))
ctx.SetFillPaint(paint)
ctx.Fill()
paint = nanovgo.LinearGradient((r+ax)*0.5, (0+ay)*0.5, bx, by, nanovgo.RGBA(0, 0, 0, 0), nanovgo.RGBA(0, 0, 0, 255))
ctx.SetFillPaint(paint)
ctx.Fill()
ctx.SetStrokeColor(nanovgo.RGBA(0, 0, 0, 64))
ctx.Stroke()
// Select circle on triangle
ax = cosF(120.0/180.0*nanovgo.PI) * r * 0.3
ay = sinF(120.0/180.0*nanovgo.PI) * r * 0.4
ctx.SetStrokeWidth(2.0)
ctx.BeginPath()
ctx.Circle(ax, ay, 5)
ctx.SetStrokeColor(nanovgo.RGBA(255, 255, 255, 192))
ctx.Stroke()
paint = nanovgo.RadialGradient(ax, ay, 7, 9, nanovgo.RGBA(0, 0, 0, 64), nanovgo.RGBA(0, 0, 0, 0))
ctx.BeginPath()
ctx.Rect(ax-20, ay-20, 40, 40)
ctx.Circle(ax, ay, 7)
ctx.PathWinding(nanovgo.Hole)
ctx.SetFillPaint(paint)
ctx.Fill()
}
func drawThumbnails(ctx *nanovgo.Context, x, y, w, h float32, images []int, t float32) {
var cornerRadius float32 = 3.0
var thumb float32 = 60.0
var arry float32 = 30.5
stackh := float32(len(images)/2)*(thumb+10) + 10
u := (1 + cosF(t*0.5)) * 0.5
u2 := (1 - cosF(t*0.2)) * 0.5
ctx.Save()
defer ctx.Restore()
// Drop shadow
shadowPaint := nanovgo.BoxGradient(x, y+4, w, h, cornerRadius*2, 20, nanovgo.RGBA(0, 0, 0, 128), nanovgo.RGBA(0, 0, 0, 0))
ctx.BeginPath()
ctx.Rect(x-10, y-10, w+20, h+30)
ctx.RoundedRect(x, y, w, h, cornerRadius)
ctx.PathWinding(nanovgo.Hole)
ctx.SetFillPaint(shadowPaint)
ctx.Fill()
// Window
ctx.BeginPath()
ctx.RoundedRect(x, y, w, h, cornerRadius)
ctx.MoveTo(x-10, y+arry)
ctx.LineTo(x+1, y+arry-11)
ctx.LineTo(x+1, y+arry+11)
ctx.SetFillColor(nanovgo.RGBA(200, 200, 200, 255))
ctx.Fill()
ctx.Block(func() {
ctx.Scissor(x, y, w, h)
ctx.Translate(0, -(stackh-h)*u)
dv := 1.0 / float32(len(images)-1)
for i, imageID := range images {
tx := x + 10.0
ty := y + 10.0
tx += float32(i%2) * (thumb + 10.0)
ty += float32(i/2) * (thumb + 10.0)
imgW, imgH, _ := ctx.ImageSize(imageID)
var iw, ih, ix, iy float32
if imgW < imgH {
iw = thumb
ih = iw * float32(imgH) / float32(imgW)
ix = 0
iy = -(ih - thumb) * 0.5
} else {
ih = thumb
iw = ih * float32(imgW) / float32(imgH)
ix = -(iw - thumb) * 0.5
iy = 0
}
v := float32(i) * dv
a := clampF((u2-v)/dv, 0, 1)
if a < 1.0 {
drawSpinner(ctx, tx+thumb/2, ty+thumb/2, thumb*0.25, t)
}
imgPaint := nanovgo.ImagePattern(tx+ix, ty+iy, iw, ih, 0.0/180.0*nanovgo.PI, imageID, a)
ctx.BeginPath()
ctx.RoundedRect(tx, ty, thumb, thumb, 5)
ctx.SetFillPaint(imgPaint)
ctx.Fill()
shadowPaint := nanovgo.BoxGradient(tx-1, ty, thumb+2, thumb+2, 5, 3, nanovgo.RGBA(0, 0, 0, 128), nanovgo.RGBA(0, 0, 0, 0))
ctx.BeginPath()
ctx.Rect(tx-5, ty-5, thumb+10, thumb+10)
ctx.RoundedRect(tx, ty, thumb, thumb, 6)
ctx.PathWinding(nanovgo.Hole)
ctx.SetFillPaint(shadowPaint)
ctx.Fill()
ctx.BeginPath()
ctx.RoundedRect(tx+0.5, ty+0.5, thumb-1, thumb-1, 4-0.5)
ctx.SetStrokeWidth(1.0)
ctx.SetStrokeColor(nanovgo.RGBA(255, 255, 255, 192))
ctx.Stroke()
}
})
// Hide fades
fadePaint := nanovgo.LinearGradient(x, y, x, y+6, nanovgo.RGBA(200, 200, 200, 255), nanovgo.RGBA(200, 200, 200, 0))
ctx.BeginPath()
ctx.Rect(x+4, y, w-8, 6)
ctx.SetFillPaint(fadePaint)
ctx.Fill()
fadePaint = nanovgo.LinearGradient(x, y+h, x, y+h-6, nanovgo.RGBA(200, 200, 200, 255), nanovgo.RGBA(200, 200, 200, 0))
ctx.BeginPath()
ctx.Rect(x+4, y+h-6, w-8, 6)
ctx.SetFillPaint(fadePaint)
ctx.Fill()
// Scroll bar
shadowPaint = nanovgo.BoxGradient(x+w-12+1, y+4+1, 8, h-8, 3, 4, nanovgo.RGBA(0, 0, 0, 32), nanovgo.RGBA(0, 0, 0, 92))
ctx.BeginPath()
ctx.RoundedRect(x+w-12, y+4, 8, h-8, 3)
ctx.SetFillPaint(shadowPaint)
// ctx.FillColor(ctx.RGBA(255,0,0,128));
ctx.Fill()
scrollH := (h / stackh) * (h - 8)
shadowPaint = nanovgo.BoxGradient(x+w-12-1, y+4+(h-8-scrollH)*u-1, 8, scrollH, 3, 4, nanovgo.RGBA(220, 220, 220, 255), nanovgo.RGBA(128, 128, 128, 255))
ctx.BeginPath()
ctx.RoundedRect(x+w-12+1, y+4+1+(h-8-scrollH)*u, 8-2, scrollH-2, 2)
ctx.SetFillPaint(shadowPaint)
// ctx.FillColor(ctx.RGBA(0,0,0,128));
ctx.Fill()
}
func drawGraph(ctx *nanovgo.Context, x, y, w, h, t float32) {
var sx, sy [6]float32
dx := w / 5.0
samples := []float32{
(1 + sinF(t*1.2345+cosF(t*0.33457)*0.44)) * 0.5,
(1 + sinF(t*0.68363+cosF(t*1.3)*1.55)) * 0.5,
(1 + sinF(t*1.1642+cosF(t*0.33457)*1.24)) * 0.5,
(1 + sinF(t*0.56345+cosF(t*1.63)*0.14)) * 0.5,
(1 + sinF(t*1.6245+cosF(t*0.254)*0.3)) * 0.5,
(1 + sinF(t*0.345+cosF(t*0.03)*0.6)) * 0.5,
}
for i := 0; i < 6; i++ {
sx[i] = x + float32(i)*dx
sy[i] = y + h*samples[i]*0.8
}
// Graph background
bg := nanovgo.LinearGradient(x, y, x, y+h, nanovgo.RGBA(0, 160, 192, 0), nanovgo.RGBA(0, 160, 192, 64))
ctx.BeginPath()
ctx.MoveTo(sx[0], sy[0])
for i := 1; i < 6; i++ {
ctx.BezierTo(sx[i-1]+dx*0.5, sy[i-1], sx[i]-dx*0.5, sy[i], sx[i], sy[i])
}
ctx.LineTo(x+w, y+h)
ctx.LineTo(x, y+h)
ctx.SetFillPaint(bg)
ctx.Fill()
// Graph line
ctx.BeginPath()
ctx.MoveTo(sx[0], sy[0]+2)
for i := 1; i < 6; i++ {
ctx.BezierTo(sx[i-1]+dx*0.5, sy[i-1]+2, sx[i]-dx*0.5, sy[i]+2, sx[i], sy[i]+2)
}
ctx.SetStrokeColor(nanovgo.RGBA(0, 0, 0, 32))
ctx.SetStrokeWidth(3.0)
ctx.Stroke()
ctx.BeginPath()
ctx.MoveTo(sx[0], sy[0])
for i := 1; i < 6; i++ {
ctx.BezierTo(sx[i-1]+dx*0.5, sy[i-1], sx[i]-dx*0.5, sy[i], sx[i], sy[i])
}
ctx.SetStrokeColor(nanovgo.RGBA(0, 160, 192, 255))
ctx.SetStrokeWidth(3.0)
ctx.Stroke()
// Graph sample pos
for i := 0; i < 6; i++ {
bg = nanovgo.RadialGradient(sx[i], sy[i]+2, 3.0, 8.0, nanovgo.RGBA(0, 0, 0, 32), nanovgo.RGBA(0, 0, 0, 0))
ctx.BeginPath()
ctx.Rect(sx[i]-10, sy[i]-10+2, 20, 20)
ctx.SetFillPaint(bg)
ctx.Fill()
}
ctx.BeginPath()
for i := 0; i < 6; i++ {
ctx.Circle(sx[i], sy[i], 4.0)
}
ctx.SetFillColor(nanovgo.RGBA(0, 160, 192, 255))
ctx.Fill()
ctx.BeginPath()
for i := 0; i < 6; i++ {
ctx.Circle(sx[i], sy[i], 2.0)
}
ctx.SetFillColor(nanovgo.RGBA(220, 220, 220, 255))
ctx.Fill()
ctx.SetStrokeWidth(1.0)
}
func (c *ColorWheel) Draw(self Widget, ctx *nanovgo.Context) {
c.WidgetImplement.Draw(self, ctx)
if !c.visible {
return
}
x := float32(c.x)
y := float32(c.y)
w := float32(c.w)
h := float32(c.h)
ctx.Save()
defer ctx.Restore()
cx := x + w*0.5
cy := y + h*0.5
r1 := toF(w < h, w, h)*0.5 - 5.0
r0 := r1 * 0.75
aeps := 0.7 / r1 // half a pixel arc length in radians (2pi cancels out).
for i := 0; i < 6; i++ {
a0 := float32(i)/6.0*nanovgo.PI*2.0 - aeps
a1 := float32(i+1)/6.0*nanovgo.PI*2.0 + aeps
ctx.BeginPath()
ctx.Arc(cx, cy, r0, a0, a1, nanovgo.Clockwise)
ctx.Arc(cx, cy, r1, a1, a0, nanovgo.CounterClockwise)
ctx.ClosePath()
sin1, cos1 := sinCosF(a0)
sin2, cos2 := sinCosF(a1)
ax := cx + cos1*(r0+r1)*0.5
ay := cy + sin1*(r0+r1)*0.5
bx := cx + cos2*(r0+r1)*0.5
by := cy + sin2*(r0+r1)*0.5
color1 := nanovgo.HSLA(a0/(nanovgo.PI*2), 1.0, 0.55, 255)
color2 := nanovgo.HSLA(a1/(nanovgo.PI*2), 1.0, 0.55, 255)
paint := nanovgo.LinearGradient(ax, ay, bx, by, color1, color2)
ctx.SetFillPaint(paint)
ctx.Fill()
}
ctx.BeginPath()
ctx.Circle(cx, cy, r0-0.5)
ctx.Circle(cx, cy, r1+0.5)
ctx.SetStrokeColor(nanovgo.MONO(0, 64))
ctx.Stroke()
// Selector
ctx.Save()
defer ctx.Restore()
ctx.Translate(cx, cy)
ctx.Rotate(c.hue * nanovgo.PI * 2)
// Marker on
u := clampF(r1/50, 1.5, 4.0)
ctx.SetStrokeWidth(u)
ctx.BeginPath()
ctx.Rect(r0-1, -2*u, r1-r0+2, 4*u)
ctx.SetStrokeColor(nanovgo.MONO(255, 192))
ctx.Stroke()
paint := nanovgo.BoxGradient(r0-3, -5, r1-r0+6, 10, 2, 4, nanovgo.MONO(0, 128), nanovgo.MONO(0, 0))
ctx.BeginPath()
ctx.Rect(r0-2-10, -4-10, r1-r0+4+20, 8+20)
ctx.Rect(r0-2, -4, r1-r0+4, 8)
ctx.PathWinding(nanovgo.Hole)
ctx.SetFillPaint(paint)
ctx.Fill()
// Center triangle
r := r0 - 6
sin1, cos1 := sinCosF(120.0 / 180.0 * nanovgo.PI)
sin2, cos2 := sinCosF(-120.0 / 180.0 * nanovgo.PI)
ax := cos1 * r
ay := sin1 * r
bx := cos2 * r
by := sin2 * r
ctx.BeginPath()
ctx.MoveTo(r, 0)
ctx.LineTo(ax, ay)
ctx.LineTo(bx, by)
ctx.ClosePath()
triPaint1 := nanovgo.LinearGradient(r, 0, ax, ay, nanovgo.HSL(c.hue, 1.0, 0.5), nanovgo.MONO(255, 255))
ctx.SetFillPaint(triPaint1)
ctx.Fill()
triPaint2 := nanovgo.LinearGradient((r+ax)*0.5, ay*0.5, bx, by, nanovgo.MONO(0, 0), nanovgo.MONO(0, 255))
ctx.SetFillPaint(triPaint2)
ctx.Fill()
// selector circle on triangle
px, py := c.calculatePosition()
ctx.SetStrokeWidth(u)
ctx.BeginPath()
ctx.Circle(px, py, 2*u)
ctx.SetStrokeColor(nanovgo.MONO(255, 192))
ctx.Stroke()
}
func (w *Window) Draw(self Widget, ctx *nanovgo.Context) {
ds := float32(w.theme.WindowDropShadowSize)
cr := float32(w.theme.WindowCornerRadius)
hh := float32(w.theme.WindowHeaderHeight)
// Draw window
wx := float32(w.x)
wy := float32(w.y)
ww := float32(w.w)
wh := float32(w.h)
ctx.Save()
ctx.BeginPath()
ctx.RoundedRect(wx, wy, ww, wh, cr)
if w.mouseFocus {
ctx.SetFillColor(w.theme.WindowFillFocused)
} else {
ctx.SetFillColor(w.theme.WindowFillUnfocused)
}
ctx.Fill()
// Draw a drop shadow
shadowPaint := nanovgo.BoxGradient(wx, wy, ww, wh, cr*2, ds*2, w.theme.DropShadow, w.theme.Transparent)
ctx.BeginPath()
ctx.Rect(wx-ds, wy-ds, ww+ds*2, wh+ds*2)
ctx.RoundedRect(wx, wy, ww, wh, cr)
ctx.PathWinding(nanovgo.Hole)
ctx.SetFillPaint(shadowPaint)
ctx.Fill()
if w.title != "" {
headerPaint := nanovgo.LinearGradient(wx, wy, ww, wh+hh, w.theme.WindowHeaderGradientTop, w.theme.WindowHeaderGradientBot)
ctx.BeginPath()
ctx.RoundedRect(wx, wy, ww, hh, cr)
ctx.SetFillPaint(headerPaint)
ctx.Fill()
ctx.BeginPath()
ctx.RoundedRect(wx, wy, ww, wh, cr)
ctx.SetStrokeColor(w.theme.WindowHeaderSepTop)
ctx.Scissor(wx, wy, ww, 0.5)
ctx.Stroke()
ctx.ResetScissor()
ctx.BeginPath()
ctx.MoveTo(wx+0.5, wy+hh-1.5)
ctx.LineTo(wx+ww-0.5, wy+hh-1.5)
ctx.SetStrokeColor(w.theme.WindowHeaderSepTop)
ctx.Stroke()
ctx.SetFontSize(18.0)
ctx.SetFontFace(w.theme.FontBold)
ctx.SetTextAlign(nanovgo.AlignCenter | nanovgo.AlignMiddle)
ctx.SetFontBlur(2.0)
ctx.SetFillColor(w.theme.DropShadow)
ctx.Text(wx+ww*0.5, wy+hh*0.5, w.title)
ctx.SetFontBlur(0.0)
if w.focused {
ctx.SetFillColor(w.theme.WindowTitleFocused)
} else {
ctx.SetFillColor(w.theme.WindowTitleUnfocused)
}
ctx.Text(wx+ww*0.5, wy+hh*0.5-1, w.title)
}
ctx.Restore()
w.WidgetImplement.Draw(self, ctx)
}
func (t *TextBox) Draw(self Widget, ctx *nanovgo.Context) {
t.WidgetImplement.Draw(self, ctx)
x := float32(t.x)
y := float32(t.y)
w := float32(t.w)
h := float32(t.h)
bg := nanovgo.BoxGradient(x+1, y+2, w-2, h-2, 3, 4, nanovgo.MONO(255, 32), nanovgo.MONO(32, 32))
fg1 := nanovgo.BoxGradient(x+1, y+2, w-2, h-2, 3, 4, nanovgo.MONO(150, 32), nanovgo.MONO(32, 32))
fg2 := nanovgo.BoxGradient(x+1, y+2, w-2, h-2, 3, 4, nanovgo.RGBA(255, 0, 0, 100), nanovgo.RGBA(255, 0, 0, 50))
ctx.BeginPath()
ctx.RoundedRect(x+1, y+2, w-2, h-2, 3)
if t.editable && t.Focused() {
if t.validFormat {
ctx.SetFillPaint(fg1)
} else {
ctx.SetFillPaint(fg2)
}
} else {
ctx.SetFillPaint(bg)
}
ctx.Fill()
ctx.BeginPath()
ctx.RoundedRect(x+0.5, y+0.5, w-1, h-1, 2.5)
ctx.SetStrokeColor(nanovgo.MONO(0, 48))
ctx.Stroke()
ctx.SetFontSize(float32(t.FontSize()))
ctx.SetFontFace(t.Font())
drawPosX := x
drawPosY := y + h*0.5 + 1
xSpacing := h * 0.3
var unitWidth float32
if t.unitImage > 0 {
iw, ih, _ := ctx.ImageSize(t.unitImage)
unitHeight := float32(ih) * 0.4
unitWidth = float32(iw) * unitHeight / float32(h)
imgPaint := nanovgo.ImagePattern(x+w-xSpacing-unitWidth, drawPosY-unitHeight*0.5,
unitWidth, unitHeight, 0, t.unitImage, toF(t.enabled, 0.7, 0.35))
ctx.BeginPath()
ctx.Rect(x+w-xSpacing-unitWidth, drawPosY-unitHeight*0.5, unitWidth, unitHeight)
ctx.SetFillPaint(imgPaint)
ctx.Fill()
unitWidth += 2
} else if t.units != "" {
unitWidth, _ = ctx.TextBounds(0, 0, t.units)
ctx.SetFillColor(nanovgo.MONO(255, toB(t.enabled, 64, 32)))
ctx.SetTextAlign(nanovgo.AlignRight | nanovgo.AlignMiddle)
ctx.Text(x+w-xSpacing, drawPosY, t.units)
}
switch t.alignment {
case TextLeft:
ctx.SetTextAlign(nanovgo.AlignLeft | nanovgo.AlignMiddle)
drawPosX += xSpacing
case TextRight:
ctx.SetTextAlign(nanovgo.AlignRight | nanovgo.AlignMiddle)
drawPosX += w - unitWidth - xSpacing
case TextCenter:
ctx.SetTextAlign(nanovgo.AlignCenter | nanovgo.AlignMiddle)
drawPosX += w * 0.5
}
if t.enabled {
ctx.SetFillColor(t.theme.TextColor)
} else {
ctx.SetFillColor(t.theme.DisabledTextColor)
}
// clip visible text area
clipX := x + xSpacing - 1
clipY := y + 1.0
clipWidth := w - unitWidth - 2.0*xSpacing + 2.0
clipHeight := h - 3.0
ctx.Scissor(clipX, clipY, clipWidth, clipHeight)
oldDrawPosX := drawPosX
drawPosX += t.textOffset
if t.committed {
ctx.Text(drawPosX, drawPosY, t.value)
} else {
text := t.editingText()
textString := string(text)
_, bounds := ctx.TextBounds(drawPosX, drawPosY, textString)
lineH := bounds[3] - bounds[1]
// find cursor positions
glyphs := ctx.TextGlyphPositionsRune(drawPosX, drawPosY, text)
t.updateCursor(ctx, bounds[2], glyphs)
// compute text offset
prevCPos := toI(t.cursorPos > 0, t.cursorPos-1, 0)
nextCPos := toI(t.cursorPos < len(glyphs), t.cursorPos+1, len(glyphs))
prevCX := t.textIndex2Position(prevCPos, bounds[2], glyphs)
nextCX := t.textIndex2Position(nextCPos, bounds[2], glyphs)
if nextCX > clipX+clipWidth {
t.textOffset -= nextCX - (clipX + clipWidth) + 1.0
}
if prevCX < clipX {
t.textOffset += clipX - prevCX + 1.0
}
drawPosX = oldDrawPosX + t.textOffset
// draw text with offset
ctx.TextRune(drawPosX, drawPosY, text)
_, bounds = ctx.TextBounds(drawPosX, drawPosY, textString)
// recompute cursor position
glyphs = ctx.TextGlyphPositionsRune(drawPosX, drawPosY, text)
var caretX float32 = -1
if len(t.preeditText) != 0 {
// draw preedit text
caretX = t.textIndex2Position(t.cursorPos+len(t.preeditText), bounds[2], glyphs)
offsetIndex := t.cursorPos
offsetX := t.textIndex2Position(t.cursorPos, bounds[2], glyphs)
ctx.SetStrokeColor(nanovgo.MONO(255, 160))
ctx.SetFillColor(nanovgo.MONO(255, 80))
ctx.SetStrokeWidth(2.0)
for i, blockLength := range t.preeditBlocks {
nextOffsetIndex := offsetIndex + blockLength
nextOffsetX := t.textIndex2Position(nextOffsetIndex, bounds[2], glyphs)
if i != t.preeditFocusedBlock {
ctx.BeginPath()
ctx.MoveTo(offsetX+2, drawPosY+lineH*0.5-1)
ctx.LineTo(nextOffsetX-2, drawPosY+lineH*0.5-1)
ctx.Stroke()
} else {
ctx.BeginPath()
ctx.Rect(offsetX, drawPosY-lineH*0.5, nextOffsetX-offsetX, lineH)
ctx.Fill()
}
offsetIndex = nextOffsetIndex
offsetX = nextOffsetX
}
screen := t.FindWindow().Parent().(*Screen)
oldCurX, oldCurY, oldCurH := screen.PreeditCursorPos()
absX, absY := t.Parent().AbsolutePosition()
newCurX := int(caretX) + absX
newCurY := int(drawPosY+lineH*0.5) + absY
newCurH := int(lineH)
if oldCurX != newCurX || oldCurY != newCurY || oldCurH != newCurH {
screen.SetPreeditCursorPos(newCurX, newCurY, newCurH)
}
} else if t.cursorPos > -1 {
// regular cursor and selection area
caretX = t.textIndex2Position(t.cursorPos, bounds[2], glyphs)
if t.selectionPos > -1 {
caretX2 := caretX
selX := t.textIndex2Position(t.selectionPos, bounds[2], glyphs)
if caretX2 > selX {
selX, caretX2 = caretX2, selX
}
// draw selection
ctx.BeginPath()
ctx.SetFillColor(nanovgo.MONO(255, 80))
ctx.Rect(caretX2, drawPosY-lineH*0.5, selX-caretX2, lineH)
ctx.Fill()
}
}
if caretX > 0 {
// draw cursor
ctx.BeginPath()
ctx.MoveTo(caretX, drawPosY-lineH*0.5)
ctx.LineTo(caretX, drawPosY+lineH*0.5)
ctx.SetStrokeColor(nanovgo.RGBA(255, 192, 0, 255))
ctx.SetStrokeWidth(1.0)
ctx.Stroke()
}
}
ctx.ResetScissor()
}