Canvas控件方法的补充

[52LY]

\atk@v1.2.2\tk\canvas.go

func (w *Canvas) PlotLine(xy map[int]int, options map[string]string) error {
    // canvas create line x1 y1... xn yn ?option value ...? // 不闭合折线
    // canvas create line 10 10 200 50 -fill red -width 3 -tags line1
    
    var tmp1 = ""
    for x,y := range xy {
        tmp1 = tmp1 + strconv.Itoa(x) + " " + strconv.Itoa(y) + " "
    }
    var tmp2 = ""
    for k,v := range options {
        tmp2 = tmp2 + "-" +k+ " " + v + " "
    }
    
	return eval(fmt.Sprintf("%v create line %v%v", w.id, tmp1, tmp2))
}

func (w *Canvas) PlotRectangle(x1,y1,x2,y2 int, options map[string]string) error {
    // canvas create rectangle x1 y1 x2 y2 ?option value ...? // 矩形
    // canvas create rectangle 10 10 200 50 -fill red -outline blue -tags rec1

    var tmp2 = ""
    for k,v := range options {
        tmp2 = tmp2 + "-" +k+ " " + v + " "
    }
    
	return eval(fmt.Sprintf("%v create rectangle %v %v %v %v %v", w.id, x1,y1,x2,y2, tmp2))
}


func (w *Canvas) PlotOval(x1,y1,x2,y2 int, options map[string]string) error {
    // canvas create oval x1 y1 x2 y2 ?option value ...?   // 矩形内切椭圆或圆
    // canvas create oval 10 10 200 50 -fill red -outline blue -tags oval1

    var tmp2 = ""
    for k,v := range options {
        tmp2 = tmp2 + "-" +k+ " " + v + " "
    }
    
	return eval(fmt.Sprintf("%v create oval %v %v %v %v %v", w.id, x1,y1,x2,y2, tmp2))
}

func (w *Canvas) PlotPolygon(xy map[int]int, options map[string]string) error {
    // canvas create polygon x1 y1 ... xn yn ?option value ...?  // 多边形
    // canvas create polygon 10 10 180 90 20 45 -fill red -width 3 -tags pol1 
    
    var tmp1 = ""
    for x,y := range xy {
        tmp1 = tmp1 + strconv.Itoa(x) + " " + strconv.Itoa(y) + " "
    }
    var tmp2 = ""
    for k,v := range options {
        tmp2 = tmp2 + "-" +k+ " " + v + " "
    }
    
	return eval(fmt.Sprintf("%v create polygon %v%v", w.id, tmp1, tmp2))
}


func (w *Canvas) PlotText(x1,y1 int, options map[string]string) error {
    // canvas create text x y ?option value ...?  // 文字
    // canvas create text 100 100 -text "A wonderful story" -anchor nw -fill black -tags txt1

    var tmp2 = ""
    for k,v := range options {
        tmp2 = tmp2 + "-" +k+ " " + v + " "
    }
    // v 值含有空格时使用{}, "text":"{A wonderful story}"
    
	return eval(fmt.Sprintf("%v create text %v %v %v", w.id, x1,y1, tmp2))
}

func (w *Canvas) PlotImage(x1,y1 int, options map[string]string) error {
    // canvas create image x y ?option value ...?
    // canvas create image 10 10 -image myimg -anchor nw
    var tmp2 = ""
    for k,v := range options {
        tmp2 = tmp2 + "-" +k+ " " + v + " "
    }
    
	return eval(fmt.Sprintf("%v create image %v %v %v", w.id, x1,y1, tmp2))
}


func (w *Canvas) PlotWidget(x1,y1 int, options map[string]string) error {
    // canvas create window x y ?option value ...?
    // canvas create window 10 10 -anchor nw -window .canvas.b
    var tmp2 = ""
    for k,v := range options {
        tmp2 = tmp2 + "-" +k+ " " + v + " "
    }
    
	return eval(fmt.Sprintf("%v create window %v %v %v", w.id, x1,y1, tmp2))
}

几个例子

    canvas := tk.NewCanvas(mw)
    canvas.SetNativeAttribute("background","red")
    canvas.SetNativeAttribute("width","200")
    canvas.SetNativeAttribute("height","200")
    canvas.SetNativeAttribute("height","200")

    // canvas.PlotLine(map[int]int{10:10,50:50}, map[string]string{"fill":"yellow","width":"3","tags":"line1"})

    // canvas.PlotRectangle(15,15,180,90,map[string]string{"fill":"green","outline":"blue","tags":"rec1"})

    canvas.PlotOval(15,15,180,90,map[string]string{"fill":"green","outline":"blue","tags":"oval1"})

    canvas.PlotPolygon(map[int]int{10:10,180:90,25:45}, map[string]string{"fill":"yellow","width":"3","tags":"pol"})

    canvas.PlotText(100,100, map[string]string{"fill":"black","text":"{A wonderful story}","anchor":"nw","tags":"txt1"})
    
    img, _ := tk.LoadImage("./btn02.png")
    
    canvas.PlotImage(70,100, map[string]string{"image":img.Id(),"anchor":"nw","tags":"img1"})
    
    canavsbtn := tk.NewButton(canvas,"canvasbtn",tk.WidgetAttrInitUseTheme(false))

    canvas.PlotWidget(50,50, map[string]string{"window":canavsbtn.Id(),"anchor":"nw","tags":"widget1"})

参考：
http://www.tcl-lang.org/man/tcl8.6/TkCmd/canvas.htm
https://tkdocs.com/tutorial/canvas.html

[visualfc]

可以直接提交 PR