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Golang Context.Translate方法代码示例

本文整理汇总了Golang中github.com/shibukawa/nanovgo.Context.Translate方法的典型用法代码示例。如果您正苦于以下问题：Golang Context.Translate方法的具体用法？Golang Context.Translate怎么用？Golang Context.Translate使用的例子？那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类github.com/shibukawa/nanovgo.Context的用法示例。


在下文中一共展示了Context.Translate方法的6个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的Golang代码示例。

示例1: drawScissor

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()
}
开发者ID:hajimehoshi，项目名称:nanovgo，代码行数:34，代码来源:demo.go

示例2: Draw

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()
	}
}
开发者ID:shibukawa，项目名称:nanogui-go，代码行数:41，代码来源:vscrollpanel.go

示例3: Draw

// 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))
}
开发者ID:shibukawa，项目名称:nanogui-go，代码行数:41，代码来源:widget.go

示例4: Draw

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()
}
开发者ID:shibukawa，项目名称:nanogui-go，代码行数:97，代码来源:colorwheel.go

示例5: drawColorWheel

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()
}
开发者ID:hajimehoshi，项目名称:nanovgo，代码行数:100，代码来源:demo.go

示例6: drawThumbnails

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()
//.........这里部分代码省略.........
开发者ID:hajimehoshi，项目名称:nanovgo，代码行数:101，代码来源:demo.go


注：本文中的github.com/shibukawa/nanovgo.Context.Translate方法示例由纯净天空整理自Github/MSDocs等开源代码及文档管理平台，相关代码片段筛选自各路编程大神贡献的开源项目，源码版权归原作者所有，传播和使用请参考对应项目的License；未经允许，请勿转载。