Ejemplo n.º 1
0
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()
	}
}
Ejemplo n.º 2
0
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))
}
Ejemplo n.º 3
0
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))
}
Ejemplo n.º 4
0
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()
}
Ejemplo n.º 5
0
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)
}
Ejemplo n.º 6
0
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()
}
Ejemplo n.º 7
0
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()

		}
	}
}
Ejemplo n.º 8
0
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)
}
Ejemplo n.º 9
0
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)
}
Ejemplo n.º 10
0
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")
}
Ejemplo n.º 11
0
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)
}
Ejemplo n.º 12
0
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))
}
Ejemplo n.º 13
0
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()
}
Ejemplo n.º 14
0
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
	}
}
Ejemplo n.º 15
0
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
}
Ejemplo n.º 16
0
// 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))
}
Ejemplo n.º 17
0
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)
}
Ejemplo n.º 18
0
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)
}
Ejemplo n.º 19
0
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()
}
Ejemplo n.º 20
0
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.")
}
Ejemplo n.º 21
0
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()
}
Ejemplo n.º 22
0
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)
}
Ejemplo n.º 23
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()
}
Ejemplo n.º 24
0
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
Ejemplo n.º 25
0
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()
}
Ejemplo n.º 26
0
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)
			}
		})
	}
}
Ejemplo n.º 27
0
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()
}