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 drawDropDown(ctx *nanovgo.Context, text string, x, y, w, h float32) {
var cornerRadius float32 = 4.0
bg := nanovgo.LinearGradient(x, y, x, y+h, nanovgo.RGBA(255, 255, 255, 16), nanovgo.RGBA(0, 0, 0, 16))
ctx.BeginPath()
ctx.RoundedRect(x+1, y+1, w-2, h-2, cornerRadius-1)
ctx.SetFillPaint(bg)
ctx.Fill()
ctx.BeginPath()
ctx.RoundedRect(x+0.5, y+0.5, w-1, h-1, cornerRadius-0.5)
ctx.SetStrokeColor(nanovgo.RGBA(0, 0, 0, 48))
ctx.Stroke()
ctx.SetFontSize(20.0)
ctx.SetFontFace("sans")
ctx.SetFillColor(nanovgo.RGBA(255, 255, 255, 160))
ctx.SetTextAlign(nanovgo.AlignLeft | nanovgo.AlignMiddle)
ctx.Text(x+h*0.3, y+h*0.5, text)
ctx.SetFontSize(h * 1.3)
ctx.SetFontFace("icons")
ctx.SetFillColor(nanovgo.RGBA(255, 255, 255, 64))
ctx.SetTextAlign(nanovgo.AlignCenter | nanovgo.AlignMiddle)
ctx.Text(x+w-h*0.5, y+h*0.5, cpToUTF8(IconCHEVRONRIGHT))
}
func drawSearchBox(ctx *nanovgo.Context, text string, x, y, w, h float32) {
cornerRadius := h/2 - 1
// Edit
bg := nanovgo.BoxGradient(x, y+1.5, w, h, h/2, 5, nanovgo.RGBA(0, 0, 0, 16), nanovgo.RGBA(0, 0, 0, 92))
ctx.BeginPath()
ctx.RoundedRect(x, y, w, h, cornerRadius)
ctx.SetFillPaint(bg)
ctx.Fill()
/* ctx.BeginPath();
ctx.RoundedRect(x+0.5f,y+0.5f, w-1,h-1, cornerRadius-0.5f);
ctx.StrokeColor(ctx.RGBA(0,0,0,48));
ctx.Stroke();*/
ctx.SetFontSize(h * 1.3)
ctx.SetFontFace("icons")
ctx.SetFillColor(nanovgo.RGBA(255, 255, 255, 64))
ctx.SetTextAlign(nanovgo.AlignCenter | nanovgo.AlignMiddle)
ctx.Text(x+h*0.55, y+h*0.55, cpToUTF8(IconSEARCH))
ctx.SetFontSize(20.0)
ctx.SetFontFace("sans")
ctx.SetFillColor(nanovgo.RGBA(255, 255, 255, 32))
ctx.SetTextAlign(nanovgo.AlignLeft | nanovgo.AlignMiddle)
ctx.Text(x+h*1.05, y+h*0.5, text)
ctx.SetFontSize(h * 1.3)
ctx.SetFontFace("icons")
ctx.SetFillColor(nanovgo.RGBA(255, 255, 255, 32))
ctx.SetTextAlign(nanovgo.AlignCenter | nanovgo.AlignMiddle)
ctx.Text(x+w-h*0.55, y+h*0.55, cpToUTF8(IconCIRCLEDCROSS))
}
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 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 drawEditBoxBase(ctx *nanovgo.Context, x, y, w, h float32) {
// Edit
bg := nanovgo.BoxGradient(x+1, y+1+1.5, w-2, h-2, 3, 4, nanovgo.RGBA(255, 255, 255, 32), nanovgo.RGBA(32, 32, 32, 32))
ctx.BeginPath()
ctx.RoundedRect(x+1, y+1, w-2, h-2, 4-1)
ctx.SetFillPaint(bg)
ctx.Fill()
ctx.BeginPath()
ctx.RoundedRect(x+0.5, y+0.5, w-1, h-1, 4-0.5)
ctx.SetStrokeColor(nanovgo.RGBA(0, 0, 0, 48))
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 drawEditBoxNum(ctx *nanovgo.Context, text, units string, x, y, w, h float32) {
drawEditBoxBase(ctx, x, y, w, h)
uw, _ := ctx.TextBounds(0, 0, units)
ctx.SetFontSize(18.0)
ctx.SetFontFace("sans")
ctx.SetFillColor(nanovgo.RGBA(255, 255, 255, 64))
ctx.SetTextAlign(nanovgo.AlignRight | nanovgo.AlignMiddle)
ctx.Text(x+w-h*0.3, y+h*0.5, units)
ctx.SetFontSize(20.0)
ctx.SetFontFace("sans")
ctx.SetFillColor(nanovgo.RGBA(255, 255, 255, 128))
ctx.SetTextAlign(nanovgo.AlignRight | nanovgo.AlignMiddle)
ctx.Text(x+w-uw-h*0.5, y+h*0.5, text)
}
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 ButtonDemo(screen *nanogui.Screen) {
window := nanogui.NewWindow(screen, "Button demo")
window.SetPosition(15, 15)
window.SetLayout(nanogui.NewGroupLayout())
nanogui.NewLabel(window, "Push buttons").SetFont("sans-bold")
b1 := nanogui.NewButton(window, "Plain button")
b1.SetCallback(func() {
fmt.Println("pushed!")
})
b2 := nanogui.NewButton(window, "Styled")
b2.SetBackgroundColor(nanovgo.RGBA(0, 0, 255, 25))
b2.SetIcon(nanogui.IconRocket)
b2.SetCallback(func() {
fmt.Println("pushed!")
})
nanogui.NewLabel(window, "Toggle button").SetFont("sans-bold")
b3 := nanogui.NewButton(window, "Toggle me")
b3.SetFlags(nanogui.ToggleButtonType)
b3.SetChangeCallback(func(state bool) {
fmt.Println("Toggle button state:", state)
})
nanogui.NewLabel(window, "Radio buttons").SetFont("sans-bold")
b4 := nanogui.NewButton(window, "Radio button 1")
b4.SetFlags(nanogui.RadioButtonType)
b5 := nanogui.NewButton(window, "Radio button 2")
b5.SetFlags(nanogui.RadioButtonType)
nanogui.NewLabel(window, "A tool palette").SetFont("sans-bold")
tools := nanogui.NewWidget(window)
tools.SetLayout(nanogui.NewBoxLayout(nanogui.Horizontal, nanogui.Middle, 0, 6))
nanogui.NewToolButton(tools, nanogui.IconCloud)
nanogui.NewToolButton(tools, nanogui.IconFastForward)
nanogui.NewToolButton(tools, nanogui.IconCompass)
nanogui.NewToolButton(tools, nanogui.IconInstall)
nanogui.NewLabel(window, "Popup buttons").SetFont("sans-bold")
b6 := nanogui.NewPopupButton(window, "Popup")
b6.SetIcon(nanogui.IconExport)
popup := b6.Popup()
popup.SetLayout(nanogui.NewGroupLayout())
nanogui.NewLabel(popup, "Arbitrary widgets can be placed here").SetFont("sans-bold")
nanogui.NewCheckBox(popup, "A check box")
b7 := nanogui.NewPopupButton(popup, "Recursive popup")
b7.SetIcon(nanogui.IconFlash)
popup2 := b7.Popup()
popup2.SetLayout(nanogui.NewGroupLayout())
nanogui.NewCheckBox(popup2, "Another check box")
}
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 drawCheckBox(ctx *nanovgo.Context, text string, x, y, w, h float32) {
ctx.SetFontSize(18.0)
ctx.SetFontFace("sans")
ctx.SetFillColor(nanovgo.RGBA(255, 255, 255, 160))
ctx.SetTextAlign(nanovgo.AlignLeft | nanovgo.AlignMiddle)
ctx.Text(x+28, y+h*0.5, text)
bg := nanovgo.BoxGradient(x+1, y+float32(int(h*0.5))-9+1, 18, 18, 3, 3, nanovgo.RGBA(0, 0, 0, 32), nanovgo.RGBA(0, 0, 0, 92))
ctx.BeginPath()
ctx.RoundedRect(x+1, y+float32(int(h*0.5))-9, 18, 18, 3)
ctx.SetFillPaint(bg)
ctx.Fill()
ctx.SetFontSize(40)
ctx.SetFontFace("icons")
ctx.SetFillColor(nanovgo.RGBA(255, 255, 255, 128))
ctx.SetTextAlign(nanovgo.AlignCenter | nanovgo.AlignMiddle)
ctx.Text(x+9+2, y+h*0.5, cpToUTF8(IconCHECK))
}
func drawSpinner(ctx *nanovgo.Context, cx, cy, r, t float32) {
a0 := 0.0 + t*6
a1 := nanovgo.PI + t*6
r0 := r
r1 := r * 0.75
ctx.Save()
defer ctx.Restore()
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.RGBA(0, 0, 0, 0), nanovgo.RGBA(0, 0, 0, 128))
ctx.SetFillPaint(paint)
ctx.Fill()
}
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 NewGraph(parent Widget, captions ...string) *Graph {
var caption string
switch len(captions) {
case 0:
caption = "Untitled"
case 1:
caption = captions[0]
default:
panic("NewGraph can accept only one extra parameter (label)")
}
graph := &Graph{
caption: caption,
backgroundColor: nanovgo.MONO(20, 128),
foregroundColor: nanovgo.RGBA(255, 192, 0, 128),
textColor: nanovgo.MONO(240, 192),
}
InitWidget(graph, parent)
return graph
}
// 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 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 drawButton(ctx *nanovgo.Context, preicon int, text string, x, y, w, h float32, col nanovgo.Color) {
var cornerRadius float32 = 4.0
var iw float32
var alpha uint8
if isBlack(col) {
alpha = 16
} else {
alpha = 32
}
bg := nanovgo.LinearGradient(x, y, x, y+h, nanovgo.RGBA(255, 255, 255, alpha), nanovgo.RGBA(0, 0, 0, alpha))
ctx.BeginPath()
ctx.RoundedRect(x+1, y+1, w-2, h-2, cornerRadius-1)
if !isBlack(col) {
ctx.SetFillColor(col)
ctx.Fill()
}
ctx.SetFillPaint(bg)
ctx.Fill()
ctx.BeginPath()
ctx.RoundedRect(x+0.5, y+0.5, w-1, h-1, cornerRadius-0.5)
ctx.SetStrokeColor(nanovgo.RGBA(0, 0, 0, 48))
ctx.Stroke()
ctx.SetFontSize(20.0)
ctx.SetFontFace("sans-bold")
tw, _ := ctx.TextBounds(0, 0, text)
if preicon != 0 {
ctx.SetFontSize(h * 1.3)
ctx.SetFontFace("icons")
iw, _ = ctx.TextBounds(0, 0, cpToUTF8(preicon))
iw += h * 0.15
ctx.SetFillColor(nanovgo.RGBA(255, 255, 255, 96))
ctx.SetTextAlign(nanovgo.AlignLeft | nanovgo.AlignMiddle)
ctx.Text(x+w*0.5-tw*0.5-iw*0.75, y+h*0.5, cpToUTF8(preicon))
}
ctx.SetFontSize(20.0)
ctx.SetFontFace("sans-bold")
ctx.SetTextAlign(nanovgo.AlignLeft | nanovgo.AlignMiddle)
ctx.SetFillColor(nanovgo.RGBA(0, 0, 0, 160))
ctx.Text(x+w*0.5-tw*0.5+iw*0.25, y+h*0.5-1, text)
ctx.SetFillColor(nanovgo.RGBA(255, 255, 255, 160))
ctx.Text(x+w*0.5-tw*0.5+iw*0.25, y+h*0.5, text)
}
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 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 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()
}
package perfgraph
import (
"fmt"
"github.com/shibukawa/nanovgo"
"time"
)
const (
nvgGraphHistoryCount = 100
)
var backgroundColor = nanovgo.RGBA(0, 0, 0, 128)
var graphColor = nanovgo.RGBA(255, 192, 0, 128)
var titleTextColor = nanovgo.RGBA(255, 192, 0, 128)
var fpsTextColor = nanovgo.RGBA(240, 240, 240, 255)
var averageTextColor = nanovgo.RGBA(240, 240, 240, 160)
var msTextColor = nanovgo.RGBA(240, 240, 240, 255)
// PerfGraph shows FPS counter on NanoVGo application
type PerfGraph struct {
name string
fontFace string
values [nvgGraphHistoryCount]float32
head int
startTime time.Time
lastUpdateTime time.Time
}
// NewPerfGraph creates PerfGraph instance
func drawEyes(ctx *nanovgo.Context, x, y, w, h, mx, my, t float32) {
ex := w * 0.23
ey := h * 0.5
lx := x + ex
ly := y + ey
rx := x + w - ex
ry := y + ey
var dx, dy, d, br float32
if ex < ey {
br = ex * 0.5
} else {
br = ey * 0.5
}
blink := float32(1.0 - math.Pow(float64(sinF(t*0.5)), 200)*0.8)
bg1 := nanovgo.LinearGradient(x, y+h*0.5, x+w*0.1, y+h, nanovgo.RGBA(0, 0, 0, 32), nanovgo.RGBA(0, 0, 0, 16))
ctx.BeginPath()
ctx.Ellipse(lx+3.0, ly+16.0, ex, ey)
ctx.Ellipse(rx+3.0, ry+16.0, ex, ey)
ctx.SetFillPaint(bg1)
ctx.Fill()
bg2 := nanovgo.LinearGradient(x, y+h*0.25, x+w*0.1, y+h, nanovgo.RGBA(220, 220, 220, 255), nanovgo.RGBA(128, 128, 128, 255))
ctx.BeginPath()
ctx.Ellipse(lx, ly, ex, ey)
ctx.Ellipse(rx, ry, ex, ey)
ctx.SetFillPaint(bg2)
ctx.Fill()
dx = (mx - rx) / (ex * 10)
dy = (my - ry) / (ey * 10)
d = sqrtF(dx*dx + dy*dy)
if d > 1.0 {
dx /= d
dy /= d
}
dx *= ex * 0.4
dy *= ey * 0.5
ctx.BeginPath()
ctx.Ellipse(lx+dx, ly+dy+ey*0.25*(1.0-blink), br, br*blink)
ctx.SetFillColor(nanovgo.RGBA(32, 32, 32, 255))
ctx.Fill()
dx = (mx - rx) / (ex * 10)
dy = (my - ry) / (ey * 10)
d = sqrtF(dx*dx + dy*dy)
if d > 1.0 {
dx /= d
dy /= d
}
dx *= ex * 0.4
dy *= ey * 0.5
ctx.BeginPath()
ctx.Ellipse(rx+dx, ry+dy+ey*0.25*(1.0-blink), br, br*blink)
ctx.SetFillColor(nanovgo.RGBA(32, 32, 32, 255))
ctx.Fill()
dx = (mx - rx) / (ex * 10)
dy = (my - ry) / (ey * 10)
d = sqrtF(dx*dx + dy*dy)
if d > 1.0 {
dx /= d
dy /= d
}
dx *= ex * 0.4
dy *= ey * 0.5
ctx.BeginPath()
ctx.Ellipse(rx+dx, ry+dy+ey*0.25*(1.0-blink), br, br*blink)
ctx.SetFillColor(nanovgo.RGBA(32, 32, 32, 255))
ctx.Fill()
gloss1 := nanovgo.RadialGradient(lx-ex*0.25, ly-ey*0.5, ex*0.1, ex*0.75, nanovgo.RGBA(255, 255, 255, 128), nanovgo.RGBA(255, 255, 255, 0))
ctx.BeginPath()
ctx.Ellipse(lx, ly, ex, ey)
ctx.SetFillPaint(gloss1)
ctx.Fill()
gloss2 := nanovgo.RadialGradient(rx-ex*0.25, ry-ey*0.5, ex*0.1, ex*0.75, nanovgo.RGBA(255, 255, 255, 128), nanovgo.RGBA(255, 255, 255, 0))
ctx.BeginPath()
ctx.Ellipse(rx, ry, ex, ey)
ctx.SetFillPaint(gloss2)
ctx.Fill()
}
func GridDemo(screen *nanogui.Screen) {
window := nanogui.NewWindow(screen, "Grid of small widgets")
window.SetPosition(445, 358)
layout := nanogui.NewGridLayout(nanogui.Horizontal, 2, nanogui.Middle, 15, 5)
layout.SetColAlignment(nanogui.Maximum, nanogui.Fill)
layout.SetColSpacing(10)
window.SetLayout(layout)
{
nanogui.NewLabel(window, "Regular text :").SetFont("sans-bold")
textBox := nanogui.NewTextBox(window, "日本語")
textBox.SetFont("japanese")
textBox.SetEditable(true)
textBox.SetFixedSize(100, 20)
textBox.SetDefaultValue("0.0")
textBox.SetFontSize(16)
}
{
nanogui.NewLabel(window, "Floating point :").SetFont("sans-bold")
textBox := nanogui.NewTextBox(window, "50.0")
textBox.SetEditable(true)
textBox.SetFixedSize(100, 20)
textBox.SetUnits("GiB")
textBox.SetDefaultValue("0.0")
textBox.SetFontSize(16)
textBox.SetFormat(`^[-]?[0-9]*\.?[0-9]+$`)
}
{
nanogui.NewLabel(window, "Positive integer :").SetFont("sans-bold")
textBox := nanogui.NewTextBox(window, "50")
textBox.SetEditable(true)
textBox.SetFixedSize(100, 20)
textBox.SetUnits("MHz")
textBox.SetDefaultValue("0.0")
textBox.SetFontSize(16)
textBox.SetFormat(`^[1-9][0-9]*$`)
}
{
nanogui.NewLabel(window, "Float box :").SetFont("sans-bold")
floatBox := nanogui.NewFloatBox(window, 10.0)
floatBox.SetEditable(true)
floatBox.SetFixedSize(100, 20)
floatBox.SetUnits("GiB")
floatBox.SetDefaultValue(0.0)
floatBox.SetFontSize(16)
}
{
nanogui.NewLabel(window, "Int box :").SetFont("sans-bold")
intBox := nanogui.NewIntBox(window, true, 50)
intBox.SetEditable(true)
intBox.SetFixedSize(100, 20)
intBox.SetUnits("MHz")
intBox.SetDefaultValue(0)
intBox.SetFontSize(16)
}
{
nanogui.NewLabel(window, "Checkbox :").SetFont("sans-bold")
checkbox := nanogui.NewCheckBox(window, "Check me")
checkbox.SetFontSize(16)
checkbox.SetChecked(true)
}
{
nanogui.NewLabel(window, "Combobox :").SetFont("sans-bold")
combobox := nanogui.NewComboBox(window, []string{"Item 1", "Item 2", "Item 3"})
combobox.SetFontSize(16)
combobox.SetFixedSize(100, 20)
}
{
nanogui.NewLabel(window, "Color button :").SetFont("sans-bold")
popupButton := nanogui.NewPopupButton(window, "")
popupButton.SetBackgroundColor(nanovgo.RGBA(255, 120, 0, 255))
popupButton.SetFontSize(16)
popupButton.SetFixedSize(100, 20)
popup := popupButton.Popup()
popup.SetLayout(nanogui.NewGroupLayout())
colorWheel := nanogui.NewColorWheel(popup)
colorWheel.SetColor(popupButton.BackgroundColor())
colorButton := nanogui.NewButton(popup, "Pick")
colorButton.SetFixedSize(100, 25)
colorButton.SetBackgroundColor(colorWheel.Color())
colorWheel.SetCallback(func(color nanovgo.Color) {
colorButton.SetBackgroundColor(color)
})
colorButton.SetChangeCallback(func(pushed bool) {
if pushed {
popupButton.SetBackgroundColor(colorButton.BackgroundColor())
popupButton.SetPushed(false)
}
})
}
}
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()
}