Golang gxui.CreateBrush函数代码示例

func (a *customAdapter) Create(theme gxui.Theme, index int) gxui.Control {
	phase := float32(index) / 1000
	c := gxui.Color{
		R: 0.5 + 0.5*math.Sinf(math.TwoPi*(phase+0.000)),
		G: 0.5 + 0.5*math.Sinf(math.TwoPi*(phase+0.333)),
		B: 0.5 + 0.5*math.Sinf(math.TwoPi*(phase+0.666)),
		A: 1.0,
	}
	i := theme.CreateImage()
	i.SetBackgroundBrush(gxui.CreateBrush(c))
	i.SetMargin(math.Spacing{L: 3, T: 3, R: 3, B: 3})
	i.OnMouseEnter(func(ev gxui.MouseEvent) {
		i.SetBorderPen(gxui.CreatePen(2, gxui.Gray80))
	})
	i.OnMouseExit(func(ev gxui.MouseEvent) {
		i.SetBorderPen(gxui.TransparentPen)
	})
	i.OnMouseDown(func(ev gxui.MouseEvent) {
		i.SetBackgroundBrush(gxui.CreateBrush(c.MulRGB(0.7)))
	})
	i.OnMouseUp(func(ev gxui.MouseEvent) {
		i.SetBackgroundBrush(gxui.CreateBrush(c))
	})
	return i
}

// parts.DrawPaint overrides
func (b *SplitterBar) Paint(c gxui.Canvas) {
	r := b.outer.Size().Rect()
	c.DrawRect(r, gxui.CreateBrush(b.backgroundColor))
	if b.foregroundColor != b.backgroundColor {
		c.DrawRect(r.ContractI(1), gxui.CreateBrush(b.foregroundColor))
	}
}

func CreateProgressBar(theme *Theme) gxui.ProgressBar {
	b := &ProgressBar{}
	b.Init(b, theme)
	b.theme = theme
	b.chevronWidth = 10

	b.OnAttach(func() {
		driver := theme.Driver()
		b.ticker = time.NewTicker(time.Millisecond * 50)
		go func() {
			for _ = range b.ticker.C {
				if !driver.Call(b.animationTick) {
					return
				}
			}
		}()
	})

	b.OnDetach(func() {
		if b.chevrons != nil {
			b.chevrons.Release()
			b.chevrons = nil
			b.ticker.Stop()
			b.ticker = nil
		}
	})
	b.SetBackgroundBrush(gxui.CreateBrush(gxui.Gray10))
	b.SetBorderPen(gxui.CreatePen(1, gxui.Gray40))
	return b
}

func (b *ProgressBar) SetSize(size math.Size) {
	b.ProgressBar.SetSize(size)

	b.chevrons = nil
	if size.Area() > 0 {
		b.chevrons = b.theme.Driver().CreateCanvas(size)
		b.chevronWidth = size.H / 2
		cw := b.chevronWidth
		for x := -cw * 2; x < size.W; x += cw * 2 {
			// x0    x2
			// |  x1 |  x3
			//    |     |
			// A-----B    - y0
			//  \     \
			//   \     \
			//    F     C - y1
			//   /     /
			//  /     /
			// E-----D    - y2
			y0, y1, y2 := 0, size.H/2, size.H
			x0, x1 := x, x+cw/2
			x2, x3 := x0+cw, x1+cw
			var chevron = gxui.Polygon{
				/* A */ gxui.PolygonVertex{Position: math.Point{X: x0, Y: y0}},
				/* B */ gxui.PolygonVertex{Position: math.Point{X: x2, Y: y0}},
				/* C */ gxui.PolygonVertex{Position: math.Point{X: x3, Y: y1}},
				/* D */ gxui.PolygonVertex{Position: math.Point{X: x2, Y: y2}},
				/* E */ gxui.PolygonVertex{Position: math.Point{X: x0, Y: y2}},
				/* F */ gxui.PolygonVertex{Position: math.Point{X: x1, Y: y1}},
			}
			b.chevrons.DrawPolygon(chevron, gxui.TransparentPen, gxui.CreateBrush(gxui.Gray30))
		}
		b.chevrons.Complete()
	}
}

func buildMoon(theme gxui.Theme, center math.Point, radius float32) gxui.Image {
	c := 40
	p := make(gxui.Polygon, c*2)
	for i := 0; i < c; i++ {
		frac := float32(i) / float32(c)
		α := math.Lerpf(math.Pi*1.2, math.Pi*-0.2, frac)
		p[i] = gxui.PolygonVertex{
			Position: math.Point{
				X: center.X + int(radius*math.Sinf(α)),
				Y: center.Y + int(radius*math.Cosf(α)),
			},
			RoundedRadius: 0,
		}
	}
	for i := 0; i < c; i++ {
		frac := float32(i) / float32(c)
		α := math.Lerpf(math.Pi*-0.2, math.Pi*1.2, frac)
		r := math.Lerpf(radius, radius*0.5, math.Sinf(frac*math.Pi))
		p[i+c] = gxui.PolygonVertex{
			Position: math.Point{
				X: center.X + int(r*math.Sinf(α)),
				Y: center.Y + int(r*math.Cosf(α)),
			},
			RoundedRadius: 0,
		}
	}
	image := theme.CreateImage()
	image.SetPolygon(p, gxui.CreatePen(3, gxui.Gray80), gxui.CreateBrush(gxui.Gray40))
	return image
}

func appMain(driver gxui.Driver) {
	theme := dark.CreateTheme(driver)

	window := theme.CreateWindow(ANIMATION_WIDTH, 2*ANIMATION_HEIGHT, "Pendulum")
	window.SetBackgroundBrush(gxui.CreateBrush(gxui.Gray50))

	image := theme.CreateImage()

	ticker := time.NewTicker(time.Millisecond * 15)
	pendulum := &mathematicalPendulum{}
	pendulum2 := &numericalPendulum{PHI_ZERO, 0.0, 0.0, time.Time{}}

	go func() {
		for _ = range ticker.C {
			canvas := driver.CreateCanvas(math.Size{ANIMATION_WIDTH, 2 * ANIMATION_HEIGHT})
			canvas.Clear(gxui.White)

			draw(pendulum, canvas, 0, 0)
			draw(pendulum2, canvas, 0, ANIMATION_HEIGHT)

			canvas.Complete()
			driver.Call(func() {
				image.SetCanvas(canvas)
			})
		}
	}()

	window.AddChild(image)

	window.OnClose(ticker.Stop)
	window.OnClose(driver.Terminate)
}

func CreateStyle(fontColor, brushColor, penColor gxui.Color, penWidth float32) Style {
	return Style{
		FontColor: fontColor,
		Pen:       gxui.CreatePen(penWidth, penColor),
		Brush:     gxui.CreateBrush(brushColor),
	}
}

func appMain(driver gxui.Driver) {
	theme := dark.CreateTheme(driver)

	window := theme.CreateWindow(500, 200, "Launch")
	window.SetBackgroundBrush(gxui.CreateBrush(gxui.Gray10))

	layout := theme.CreateLinearLayout()
	layout.SetDirection(gxui.TopToBottom)

	searchBox := theme.CreateTextBox()
	searchBox.SetDesiredWidth(500)
	searchBox.SetMargin(math.Spacing{L: 4, T: 2, R: 4, B: 2})

	layout.AddChild(searchBox)

	adapter := gxui.CreateDefaultAdapter()

	searchBox.OnKeyDown(func(ev gxui.KeyboardEvent) {
		res := search.Search(searchBox.Text())
		adapter.SetItems(res.NameList())
	})

	droplist := theme.CreateDropDownList()
	droplist.SetAdapter(adapter)

	layout.AddChild(droplist)

	window.AddChild(layout)
	window.OnClose(driver.Terminate)

}

func drawMoon(canvas gxui.Canvas, center math.Point, radius float32) {
	c := 40
	p := make(gxui.Polygon, c*2)
	for i := 0; i < c; i++ {
		frac := float32(i) / float32(c)
		α := math.Lerpf(math.Pi*1.2, math.Pi*-0.2, frac)
		p[i] = gxui.PolygonVertex{
			Position: math.Point{
				X: center.X + int(radius*math.Sinf(α)),
				Y: center.Y + int(radius*math.Cosf(α)),
			},
			RoundedRadius: 0,
		}
	}
	for i := 0; i < c; i++ {
		frac := float32(i) / float32(c)
		α := math.Lerpf(math.Pi*-0.2, math.Pi*1.2, frac)
		r := math.Lerpf(radius, radius*0.5, math.Sinf(frac*math.Pi))
		p[i+c] = gxui.PolygonVertex{
			Position: math.Point{
				X: center.X + int(r*math.Sinf(α)),
				Y: center.Y + int(r*math.Cosf(α)),
			},
			RoundedRadius: 0,
		}
	}
	canvas.DrawPolygon(p, gxui.CreatePen(3, gxui.Gray80), gxui.CreateBrush(gxui.Gray40))
}

func appMain(driver gxui.Driver) {
	theme := dark.CreateTheme(driver)

	window := theme.CreateWindow(800, 600, "Hi")
	window.SetBackgroundBrush(gxui.CreateBrush(gxui.Gray50))

	fontData, err := ioutil.ReadFile(sysFont("幼圆")) //this font comes from windows
	if err != nil {
		log.Fatalf("error reading font: %v", err)
	}
	font, err := driver.CreateFont(fontData, 50)
	if err != nil {
		panic(err)
	}
	label := theme.CreateLabel()
	label.SetFont(font)
	label.SetColor(gxui.Red50)
	label.SetText("支持一下中文")

	button := theme.CreateButton()
	button.SetText("点我一下")

	window.AddChild(label)
	window.AddChild(button)

	window.OnClose(driver.Terminate)

}

func (b *ProgressBar) PaintProgress(c gxui.Canvas, r math.Rect, frac float32) {
	r.Max.X = math.Lerp(r.Min.X, r.Max.X, frac)
	c.DrawRect(r, gxui.CreateBrush(gxui.Gray50))
	c.Push()
	c.AddClip(r)
	c.DrawCanvas(b.chevrons, math.Point{X: b.scroll})
	c.Pop()
}

func (treeControlCreator) Create(theme gxui.Theme, control gxui.Control, node *mixins.TreeToListNode) gxui.Control {
	img := theme.CreateImage()
	imgSize := math.Size{W: 10, H: 10}

	ll := theme.CreateLinearLayout()
	ll.SetDirection(gxui.LeftToRight)

	btn := theme.CreateButton()
	btn.SetBackgroundBrush(gxui.TransparentBrush)
	btn.SetBorderPen(gxui.CreatePen(1, gxui.Gray30))
	btn.SetMargin(math.Spacing{L: 1, R: 1, T: 1, B: 1})
	btn.OnClick(func(ev gxui.MouseEvent) {
		if ev.Button == gxui.MouseButtonLeft {
			node.ToggleExpanded()
		}
	})
	btn.AddChild(img)

	update := func() {
		expanded := node.IsExpanded()
		canvas := theme.Driver().CreateCanvas(imgSize)
		btn.SetVisible(!node.IsLeaf())
		switch {
		case !btn.IsMouseDown(gxui.MouseButtonLeft) && expanded:
			canvas.DrawPolygon(expandedPoly, gxui.TransparentPen, gxui.CreateBrush(gxui.Gray70))
		case !btn.IsMouseDown(gxui.MouseButtonLeft) && !expanded:
			canvas.DrawPolygon(collapsedPoly, gxui.TransparentPen, gxui.CreateBrush(gxui.Gray70))
		case expanded:
			canvas.DrawPolygon(expandedPoly, gxui.TransparentPen, gxui.CreateBrush(gxui.Gray30))
		case !expanded:
			canvas.DrawPolygon(collapsedPoly, gxui.TransparentPen, gxui.CreateBrush(gxui.Gray30))
		}
		canvas.Complete()
		img.SetCanvas(canvas)
	}
	btn.OnMouseDown(func(gxui.MouseEvent) { update() })
	btn.OnMouseUp(func(gxui.MouseEvent) { update() })
	update()

	gxui.WhileAttached(btn, node.OnChange, update)

	ll.AddChild(btn)
	ll.AddChild(control)
	ll.SetPadding(math.Spacing{L: 16 * node.Depth()})
	return ll
}

func appMain(driver gxui.Driver) {
	theme := flags.CreateTheme(driver)

	label1 := theme.CreateLabel()
	label1.SetColor(gxui.White)
	label1.SetText("1x1")

	cell1x1 := theme.CreateLinearLayout()
	cell1x1.SetBackgroundBrush(gxui.CreateBrush(gxui.Blue40))
	cell1x1.SetHorizontalAlignment(gxui.AlignCenter)
	cell1x1.AddChild(label1)

	label2 := theme.CreateLabel()
	label2.SetColor(gxui.White)
	label2.SetText("2x1")

	cell2x1 := theme.CreateLinearLayout()
	cell2x1.SetBackgroundBrush(gxui.CreateBrush(gxui.Green40))
	cell2x1.SetHorizontalAlignment(gxui.AlignCenter)
	cell2x1.AddChild(label2)

	label3 := theme.CreateLabel()
	label3.SetColor(gxui.White)
	label3.SetText("1x2")

	cell1x2 := theme.CreateLinearLayout()
	cell1x2.SetBackgroundBrush(gxui.CreateBrush(gxui.Red40))
	cell1x2.SetHorizontalAlignment(gxui.AlignCenter)
	cell1x2.AddChild(label3)

	table := theme.CreateTableLayout()
	table.SetGrid(3, 2) // columns, rows

	// row, column, horizontal span, vertical span
	table.SetChildAt(0, 0, 1, 1, cell1x1)
	table.SetChildAt(0, 1, 2, 1, cell2x1)
	table.SetChildAt(2, 0, 1, 2, cell1x2)

	window := theme.CreateWindow(800, 600, "Table")
	window.AddChild(table)
	window.OnClose(driver.Terminate)
}

func (t *Tree) CreateExpandButton(theme gxui.Theme, node *mixins.TreeInternalNode) gxui.Button {
	img := theme.CreateImage()
	imgSize := math.Size{W: 10, H: 10}

	btn := theme.CreateButton()
	btn.SetBackgroundBrush(gxui.TransparentBrush)
	btn.SetBorderPen(gxui.CreatePen(1, gxui.Gray30))
	btn.SetMargin(math.Spacing{L: 1, R: 1, T: 1, B: 1})
	btn.OnClick(func(ev gxui.MouseEvent) {
		if ev.Button == gxui.MouseButtonLeft {
			if node.IsExpanded() {
				node.Collapse()
			} else {
				node.Expand()
			}
		}
	})
	btn.AddChild(img)

	updateStyle := func() {
		canvas := theme.Driver().CreateCanvas(imgSize)
		switch {
		case !btn.IsMouseDown(gxui.MouseButtonLeft) && node.IsExpanded():
			canvas.DrawPolygon(expandedPoly, gxui.TransparentPen, gxui.CreateBrush(gxui.Gray70))
		case !btn.IsMouseDown(gxui.MouseButtonLeft) && !node.IsExpanded():
			canvas.DrawPolygon(collapsedPoly, gxui.TransparentPen, gxui.CreateBrush(gxui.Gray70))
		case node.IsExpanded():
			canvas.DrawPolygon(expandedPoly, gxui.TransparentPen, gxui.CreateBrush(gxui.Gray30))
		case !node.IsExpanded():
			canvas.DrawPolygon(collapsedPoly, gxui.TransparentPen, gxui.CreateBrush(gxui.Gray30))
		}
		canvas.Complete()
		img.SetCanvas(canvas)
	}
	btn.OnMouseDown(func(gxui.MouseEvent) { updateStyle() })
	btn.OnMouseUp(func(gxui.MouseEvent) { updateStyle() })
	node.OnExpandedChanged(func(e bool) { updateStyle() })
	updateStyle()
	return btn
}

func appMain(driver gxui.Driver) {
	theme := flags.CreateTheme(driver)
	width := int(nmj.Width)
	height := int(nmj.Heigth)

	window := theme.CreateWindow(width, height, "navmesh")
	canvas := driver.CreateCanvas(math.Size{W: width, H: height})

	ps := nmj.Points

	// mouse
	isStart := true
	x1, y1, x2, y2 := int64(0), int64(0), int64(0), int64(0)

	window.OnMouseDown(func(me gxui.MouseEvent) {
		if nm.IsWalkOfPoint(navmesh.Point{X: int64(me.Point.X), Y: int64(me.Point.Y)}) {
			if isStart {
				x1 = int64(me.Point.X)
				y1 = int64(me.Point.Y)
			} else {
				x2 = int64(me.Point.X)
				y2 = int64(me.Point.Y)
			}
			if !isStart {
				drawWalkPath(window, theme, driver, x1, y1, x2, y2)
			}
			isStart = !isStart
		}
	})

	// draw mesh
	for i := 0; i < len(ps); i++ {
		polys := make([]gxui.PolygonVertex, 0, len(ps[i]))
		for j := 0; j < len(ps[i]); j++ {
			polys = append(polys, gxui.PolygonVertex{
				Position: math.Point{
					int(ps[i][j].X),
					int(ps[i][j].Y),
				}})
		}
		//		canvas.DrawPolygon(polys, gxui.CreatePen(2, gxui.Gray80), gxui.CreateBrush(gxui.Gray40))
		canvas.DrawPolygon(polys, gxui.CreatePen(2, gxui.Red), gxui.CreateBrush(gxui.Yellow))
	}

	canvas.Complete()
	image := theme.CreateImage()
	image.SetCanvas(canvas)
	window.AddChild(image)
	window.OnClose(driver.Terminate)
}