func loadImageDirectory(ctx *nanovgo.Context, dir string) []nanogui.Image {
var images []nanogui.Image
files, err := ioutil.ReadDir(dir)
if err != nil {
panic(fmt.Sprintf("loadImageDirectory: read error %v\n", err))
}
for _, file := range files {
if file.IsDir() {
continue
}
ext := path.Ext(file.Name())
if ext != ".png" {
continue
}
fullPath := path.Join(dir, file.Name())
img := ctx.CreateImage(fullPath, 0)
if img == 0 {
panic("Could not open image data!")
}
images = append(images, nanogui.Image{
ImageID: img,
Name: fullPath[:len(fullPath)-4],
})
}
return images
}
func (i *ImageView) PreferredSize(self Widget, ctx *nanovgo.Context) (int, int) {
if i.image == 0 {
return 0, 0
}
w, h, _ := ctx.ImageSize(i.image)
return w, h
}
func drawLabel(ctx *nanovgo.Context, text string, x, y, w, h float32) {
ctx.SetFontSize(18.0)
ctx.SetFontFace("sans")
ctx.SetFillColor(nanovgo.RGBA(255, 255, 255, 128))
ctx.SetTextAlign(nanovgo.AlignLeft | nanovgo.AlignMiddle)
ctx.Text(x, y+h*0.5, text)
}
func drawEditBox(ctx *nanovgo.Context, text string, x, y, w, h float32) {
drawEditBoxBase(ctx, x, y, w, h)
ctx.SetFontSize(20.0)
ctx.SetFontFace("sans")
ctx.SetFillColor(nanovgo.RGBA(255, 255, 255, 64))
ctx.SetTextAlign(nanovgo.AlignLeft | nanovgo.AlignMiddle)
ctx.Text(x+h*0.3, y+h*0.5, text)
}
func RenderDemo(ctx *nanovgo.Context, mx, my, width, height, t float32, blowup bool, data *DemoData) {
drawEyes(ctx, width-250, 50, 150, 100, mx, my, t)
drawParagraph(ctx, width-450, 50, 150, 100, mx, my)
drawGraph(ctx, 0, height/2, width, height/2, t)
drawColorWheel(ctx, width-300, height-300, 250.0, 250.0, t)
// Line joints
drawLines(ctx, 120, height-50, 600, 50, t)
// Line widths
drawWidths(ctx, 10, 50, 30)
// Line caps
drawCaps(ctx, 10, 300, 30)
drawScissor(ctx, 50, height-80, t)
ctx.Save()
defer ctx.Restore()
if blowup {
ctx.Rotate(sinF(t*0.3) * 5.0 / 180.0 * nanovgo.PI)
ctx.Scale(2.0, 2.0)
}
// Widgets
drawWindow(ctx, "Widgets `n Stuff", 50, 50, 300, 400)
var x float32 = 60.0
var y float32 = 95.0
drawSearchBox(ctx, "Search", x, y, 280, 25)
y += 40
drawDropDown(ctx, "Effects", x, y, 280, 28)
popy := y + 14
y += 45
// Form
drawLabel(ctx, "Login", x, y, 280, 20)
y += 25
drawEditBox(ctx, "Email", x, y, 280, 28)
y += 35
drawEditBox(ctx, "Password", x, y, 280, 28)
y += 38
drawCheckBox(ctx, "Remember me", x, y, 140, 28)
drawButton(ctx, IconLOGIN, "Sign in", x+138, y, 140, 28, nanovgo.RGBA(0, 96, 128, 255))
y += 45
// Slider
drawLabel(ctx, "Diameter", x, y, 280, 20)
y += 25
drawEditBoxNum(ctx, "123.00", "px", x+180, y, 100, 28)
drawSlider(ctx, 0.4, x, y, 170, 28)
y += 55
drawButton(ctx, IconTRASH, "Delete", x, y, 160, 28, nanovgo.RGBA(128, 16, 8, 255))
drawButton(ctx, 0, "Cancel", x+170, y, 110, 28, nanovgo.RGBA(0, 0, 0, 0))
// Thumbnails box
drawThumbnails(ctx, 365, popy-30, 160, 300, data.Images, t)
}
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()
}
func loadImageDirectory(ctx *nanovgo.Context, dir string) []nanogui.Image {
var images []nanogui.Image
files, err := AssetDir("icons")
if err != nil {
panic(err)
}
for _, file := range files {
fullPath := fmt.Sprintf("%s/%s", "icons", file)
img := ctx.CreateImageFromMemory(0, MustAsset(fullPath))
if img == 0 {
panic("Could not open image data!")
}
images = append(images, nanogui.Image{
ImageID: img,
Name: fullPath[:len(fullPath)-4],
})
}
return images
}
func (t *TextBox) PreferredSize(self Widget, ctx *nanovgo.Context) (int, int) {
sizeH := float32(t.FontSize()) * 1.4
var unitWidth, textWidth float32
ctx.SetFontSize(float32(t.FontSize()))
if t.unitImage > 0 {
w, h, _ := ctx.ImageSize(t.unitImage)
unitHeight := sizeH * 0.4
unitWidth = float32(w) * unitHeight / float32(h)
} else if t.units != "" {
unitWidth, _ = ctx.TextBounds(0, 0, t.units)
}
textWidth, _ = ctx.TextBounds(0, 0, string(t.editingText()))
sizeW := sizeH + textWidth + unitWidth
return int(sizeW), int(sizeH)
}
func (c *CheckBox) PreferredSize(self Widget, ctx *nanovgo.Context) (int, int) {
fw, fh := c.FixedSize()
if fw > 0 || fh > 0 {
return fw, fh
}
fontSize := float32(c.FontSize())
ctx.SetFontSize(fontSize)
ctx.SetFontFace(c.theme.FontNormal)
w, _ := ctx.TextBounds(0, 0, c.caption)
return int(w + 1.7*fontSize), int(fontSize * 1.3)
}
func (w *Window) PreferredSize(self Widget, ctx *nanovgo.Context) (int, int) {
if w.buttonPanel != nil {
w.buttonPanel.SetVisible(false)
}
width, height := w.WidgetImplement.PreferredSize(self, ctx)
if w.buttonPanel != nil {
w.buttonPanel.SetVisible(true)
}
ctx.SetFontSize(18.0)
ctx.SetFontFace(w.theme.FontBold)
_, bounds := ctx.TextBounds(0, 0, w.title)
return maxI(width, int(bounds[2]-bounds[0])+20), maxI(height, int(bounds[3]-bounds[1]))
}
func NewStandardTheme(ctx *nanovgo.Context) *Theme {
ctx.CreateFontFromMemory("sans", MustAsset("fonts/Roboto-Regular.ttf"), 0)
ctx.CreateFontFromMemory("sans-bold", MustAsset("fonts/Roboto-Bold.ttf"), 0)
ctx.CreateFontFromMemory("icons", MustAsset("fonts/entypo.ttf"), 0)
return &Theme{
StandardFontSize: 16,
ButtonFontSize: 20,
TextBoxFontSize: 20,
WindowCornerRadius: 2,
WindowHeaderHeight: 30,
WindowDropShadowSize: 10,
ButtonCornerRadius: 2,
DropShadow: nanovgo.MONO(0, 128),
Transparent: nanovgo.MONO(0, 0),
BorderDark: nanovgo.MONO(29, 255),
BorderLight: nanovgo.MONO(92, 255),
BorderMedium: nanovgo.MONO(35, 255),
TextColor: nanovgo.MONO(255, 160),
DisabledTextColor: nanovgo.MONO(255, 80),
TextColorShadow: nanovgo.MONO(0, 160),
IconColor: nanovgo.MONO(255, 160),
ButtonGradientTopFocused: nanovgo.MONO(64, 255),
ButtonGradientBotFocused: nanovgo.MONO(48, 255),
ButtonGradientTopUnfocused: nanovgo.MONO(74, 255),
ButtonGradientBotUnfocused: nanovgo.MONO(58, 255),
ButtonGradientTopPushed: nanovgo.MONO(41, 255),
ButtonGradientBotPushed: nanovgo.MONO(29, 255),
WindowFillUnfocused: nanovgo.MONO(43, 230),
WindowFillFocused: nanovgo.MONO(45, 230),
WindowTitleUnfocused: nanovgo.MONO(220, 160),
WindowTitleFocused: nanovgo.MONO(255, 190),
WindowHeaderGradientTop: nanovgo.MONO(74, 255),
WindowHeaderGradientBot: nanovgo.MONO(58, 255),
WindowHeaderSepTop: nanovgo.MONO(92, 255),
WindowHeaderSepBot: nanovgo.MONO(29, 255),
WindowPopup: nanovgo.MONO(50, 255),
WindowPopupTransparent: nanovgo.MONO(50, 0),
FontNormal: "sans",
FontBold: "sans-bold",
FontIcons: "icons",
}
}
func LoadDemo(ctx *nanovgo.Context) *demo.DemoData {
d := &demo.DemoData{}
for i := 0; i < 12; i++ {
path := fmt.Sprintf("assets/image%d.jpg", i+1)
d.Images = append(d.Images, ctx.CreateImageFromMemory(0, demo.MustAsset(path)))
if d.Images[i] == 0 {
log.Fatalf("Could not load %s", path)
}
}
d.FontIcons = ctx.CreateFontFromMemory("icons", demo.MustAsset("assets/entypo.ttf"), 0)
if d.FontIcons == -1 {
log.Fatalln("Could not add font icons.")
}
d.FontNormal = ctx.CreateFontFromMemory("sans", demo.MustAsset("assets/Roboto-Regular.ttf"), 0)
if d.FontNormal == -1 {
log.Fatalln("Could not add font italic.")
}
d.FontBold = ctx.CreateFontFromMemory("sans-bold", demo.MustAsset("assets/Roboto-Bold.ttf"), 0)
if d.FontBold == -1 {
log.Fatalln("Could not add font bold.")
}
return d
}
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 (p *ProgressBar) Draw(self Widget, ctx *nanovgo.Context) {
px := float32(p.x)
py := float32(p.y)
pw := float32(p.w)
ph := float32(p.h)
p.WidgetImplement.Draw(self, ctx)
paint := nanovgo.BoxGradient(px+1, py+1, pw-2, ph, 3, 4, nanovgo.MONO(0, 32), nanovgo.MONO(0, 92))
ctx.BeginPath()
ctx.RoundedRect(px, py, pw, ph, 3)
ctx.SetFillPaint(paint)
ctx.Fill()
value := clampF(p.value, 0.0, 1.0)
barPos := (pw - 2) * value
barPaint := nanovgo.BoxGradient(px, py, barPos+1.5, ph-1, 3, 4, nanovgo.MONO(220, 100), nanovgo.MONO(128, 100))
ctx.BeginPath()
ctx.RoundedRect(px+1, py+1, barPos, ph-2, 3)
ctx.SetFillPaint(barPaint)
ctx.Fill()
}
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 drawLines(ctx *nanovgo.Context, x, y, w, h, t float32) {
var pad float32 = 5.0
s := w/9.0 - pad*2
joins := []nanovgo.LineCap{nanovgo.Miter, nanovgo.Round, nanovgo.Bevel}
caps := []nanovgo.LineCap{nanovgo.Butt, nanovgo.Round, nanovgo.Square}
ctx.Save()
defer ctx.Restore()
pts := []float32{
-s*0.25 + cosF(t*0.3)*s*0.5,
sinF(t*0.3) * s * 0.5,
-s * 0.25,
0,
s * 0.25,
0,
s*0.25 + cosF(-t*0.3)*s*0.5,
sinF(-t*0.3) * s * 0.5,
}
for i, cap := range caps {
for j, join := range joins {
fx := x + s*0.5 + float32(i*3+j)/9.0*w + pad
fy := y - s*0.5 + pad
ctx.SetLineCap(cap)
ctx.SetLineJoin(join)
ctx.SetStrokeWidth(s * 0.3)
ctx.SetStrokeColor(nanovgo.RGBA(0, 0, 0, 160))
ctx.BeginPath()
ctx.MoveTo(fx+pts[0], fy+pts[1])
ctx.LineTo(fx+pts[2], fy+pts[3])
ctx.LineTo(fx+pts[4], fy+pts[5])
ctx.LineTo(fx+pts[6], fy+pts[7])
ctx.Stroke()
ctx.SetLineCap(nanovgo.Butt)
ctx.SetLineJoin(nanovgo.Bevel)
ctx.SetStrokeWidth(1.0)
ctx.SetStrokeColor(nanovgo.RGBA(0, 192, 255, 255))
ctx.BeginPath()
ctx.MoveTo(fx+pts[0], fy+pts[1])
ctx.LineTo(fx+pts[2], fy+pts[3])
ctx.LineTo(fx+pts[4], fy+pts[5])
ctx.LineTo(fx+pts[6], fy+pts[7])
ctx.Stroke()
}
}
}
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()
}
}
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 drawWidths(ctx *nanovgo.Context, x, y, width float32) {
ctx.Save()
defer ctx.Restore()
ctx.SetStrokeColor(nanovgo.RGBA(0, 0, 0, 255))
for i := 0; i < 20; i++ {
w := (float32(i) + 0.5) * 0.1
ctx.SetStrokeWidth(w)
ctx.BeginPath()
ctx.MoveTo(x, y)
ctx.LineTo(x+width, y+width*0.3)
ctx.Stroke()
y += 10
}
}
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 (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)
}
// 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 (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 (c *CheckBox) Draw(self Widget, ctx *nanovgo.Context) {
cx := float32(c.x)
cy := float32(c.y)
ch := float32(c.h)
c.WidgetImplement.Draw(self, ctx)
fontSize := float32(c.FontSize())
ctx.SetFontSize(fontSize)
ctx.SetFontFace(c.theme.FontNormal)
if c.enabled {
ctx.SetFillColor(c.theme.TextColor)
} else {
ctx.SetFillColor(c.theme.DisabledTextColor)
}
ctx.SetTextAlign(nanovgo.AlignLeft | nanovgo.AlignMiddle)
ctx.Text(cx+1.2*ch+5, cy+ch*0.5, c.caption)
var bgAlpha uint8
if c.pushed {
bgAlpha = 100
} else {
bgAlpha = 32
}
bgPaint := nanovgo.BoxGradient(cx+1.5, cy+1.5, ch-2.0, ch-2.0, 3, 3, nanovgo.MONO(0, bgAlpha), nanovgo.MONO(0, 180))
ctx.BeginPath()
ctx.RoundedRect(cx+1.0, cy+1.0, ch-2.0, ch-2.0, 3)
ctx.SetFillPaint(bgPaint)
ctx.Fill()
if c.checked {
ctx.SetFontSize(ch)
ctx.SetFontFace(c.theme.FontIcons)
if c.enabled {
ctx.SetFillColor(c.theme.IconColor)
} else {
ctx.SetFillColor(c.theme.DisabledTextColor)
}
ctx.SetTextAlign(nanovgo.AlignCenter | nanovgo.AlignMiddle)
ctx.Text(cx+ch*0.5+1.0, cy+ch*0.5, string([]rune{rune(IconCheck)}))
}
}
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 (p *PopupButton) Draw(self Widget, ctx *nanovgo.Context) {
if !p.enabled && p.pushed {
p.pushed = false
}
p.popup.SetVisible(p.pushed)
p.Button.Draw(self, ctx)
if p.chevronIcon != 0 {
ctx.SetFillColor(p.TextColor())
ctx.SetFontSize(float32(p.FontSize()))
ctx.SetFontFace(p.theme.FontIcons)
ctx.SetTextAlign(nanovgo.AlignMiddle | nanovgo.AlignLeft)
fontString := string([]rune{rune(p.chevronIcon)})
iw, _ := ctx.TextBounds(0, 0, fontString)
px, py := p.Position()
w, h := p.Size()
ix := px + w - int(iw) - 8
iy := py + h/2 - 1
ctx.Text(float32(ix), float32(iy), fontString)
}
}
func LoadFontAs(ctx *nanovgo.Context, name string) {
ctx.CreateFontFromMemory(name, MustAsset("font/MaterialIcons-Regular.ttf"), 0)
}
func LoadFont(ctx *nanovgo.Context) {
ctx.CreateFontFromMemory("materialicons", MustAsset("font/MaterialIcons-Regular.ttf"), 0)
}
// 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 (v *VScrollPanel) Draw(self Widget, ctx *nanovgo.Context) {
if len(v.children) == 0 {
return
}
x := float32(v.x)
y := float32(v.y)
w := float32(v.w)
h := float32(v.h)
child := v.children[0]
layout := self.Layout()
if layout != nil {
_, v.childPreferredHeight = layout.PreferredSize(self, ctx)
} else {
_, v.childPreferredHeight = child.PreferredSize(child, ctx)
}
ctx.Save()
ctx.Translate(x, y)
ctx.Scissor(0, 0, w, h)
ctx.Translate(0, -v.scroll*(float32(v.childPreferredHeight)-h))
if child.Visible() {
child.Draw(child, ctx)
}
ctx.Restore()
if v.childPreferredHeight > v.h {
scrollH := h * minF(1.0, h/float32(v.childPreferredHeight))
scrollH = minF(maxF(20.0, scrollH), h)
paint := nanovgo.BoxGradient(x+w-12+1, y+4+1, 8, h-8, 3, 4, nanovgo.MONO(0, 32), nanovgo.MONO(0, 92))
ctx.BeginPath()
ctx.RoundedRect(x+w-12, y+4, 8, h-8, 3)
ctx.SetFillPaint(paint)
ctx.Fill()
barPaint := nanovgo.BoxGradient(x+y-12-1, y+4+1+(h-8-scrollH)*v.scroll-1, 8, scrollH, 3, 4, nanovgo.MONO(220, 100), nanovgo.MONO(128, 100))
ctx.BeginPath()
ctx.RoundedRect(x+w-12+1, y+4+1+(h-8-scrollH)*v.scroll, 8-2, scrollH-2, 2)
ctx.SetFillPaint(barPaint)
ctx.Fill()
}
}