diff --git a/tk/canvas.go b/tk/canvas.go
index 2b69cff..683804a 100644
--- a/tk/canvas.go
+++ b/tk/canvas.go
@@ -240,6 +240,108 @@ func (w *Canvas) YScrollIncrement() int {
 	return r
 }
 
+// Canvas Plot Geometry 
+func (w *Canvas) PlotLine(xy []Pos, 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 _,pos := range xy {
+        tmp1 = tmp1 + strconv.Itoa(pos.X) + " " + strconv.Itoa(pos.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 []Pos, 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 _,pos := range xy {
+        tmp1 = tmp1 + strconv.Itoa(pos.X) + " " + strconv.Itoa(pos.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))
+}
+// 参考：
+// http://www.tcl-lang.org/man/tcl8.6/TkCmd/canvas.htm
+// https://tkdocs.com/tutorial/canvas.html
+// 例子：https://github.com/visualfc/atk/issues/16
+
+
+
+// WidgetAttr
 func CanvasAttrBackground(color string) *WidgetAttr {
 	return &WidgetAttr{"background", color}
 }
diff --git a/tk/plotchart.go b/tk/plotchart.go
new file mode 100644
index 0000000..28c74d2
--- /dev/null
+++ b/tk/plotchart.go
@@ -0,0 +1,22 @@
+// package require Plotchart
+// https://github.com/tcltk/tklib/blob/master/modules/plotchart/plotchart.tcl
+// https://core.tcl-lang.org/tklib/doc/trunk/embedded/www/tklib/files/modules/plotchart/plotchart.html
+
+// package require Plotchart
+// canvas .c -background white -width 400 -height 200
+// pack   .c -fill both
+// #
+// # Create the plot with its x- and y-axes
+// #
+// set s [::Plotchart::createXYPlot .c {0.0 100.0 10.0} {0.0 100.0 20.0}]
+// foreach {x y} {0.0 32.0 10.0 50.0 25.0 60.0 78.0 11.0 } {
+//     $s plot series1 $x $y
+// }
+// $s title "Data series"
+
+
+
+
+
+
+
diff --git a/tk/theme_ttk.go b/tk/theme_ttk.go
index 471ad78..4ebbca8 100644
--- a/tk/theme_ttk.go
+++ b/tk/theme_ttk.go
@@ -47,6 +47,57 @@ var (
 	TtkTheme       = &ttkTheme{}
 )
 
+func (w *BaseWidget) StyleName() string {
+    // ttk::button .b; winfo class .b  // ==> TButton
+	r, _ := evalAsString(fmt.Sprintf("winfo class %v", w.id))
+	return r
+}
+
+func (w *BaseWidget) StyleLookUp(name, option string) string {
+    // ttk::style lookup style -option
+    // ttk::style lookup 1.TButton -font  // [---> helvetica 24]
+    r1, _ := evalAsString(fmt.Sprintf("ttk::style lookup %v -%v", name,option))
+    return r1
+}
+
+
+func StyleConfigure(name string, options map[string]string) error {
+    // ttk::style configure style ?-option ?value option value...? ?
+    // ttk::style configure Emergency.TButton -foreground red -padding 10
+    // ttk::button .b -text "Hello" -style "Fun.TButton"
+    var tmp = ""
+    for k,v := range options {
+        tmp = tmp + "-" + k + " " + v + " "
+    }
+    
+    return eval(fmt.Sprintf("ttk::style configure %v %v", name,tmp))
+}
+
+func StyleMap(name string, options map[string]map[string]string) error{
+    // ttk::style map style ?-option { statespec value... }?
+    // ttk::style map TRadiobutton -foreground [list !pressed blue pressed yellow] -background [list selected black !selected white]
+    var tmp1 = ""
+    var tmp2 = ""
+    for k1,v1 := range options {
+        tmp2 = "[list "
+        tmp1 = tmp1 + "-" + k1 + " "
+        for k2,v2 := range v1 {
+            tmp2 = tmp2 + k2 + " " + v2 + " "
+        }
+        tmp2 = tmp2 + "] "
+        tmp1 = tmp1 + tmp2
+    }
+    // fmt.Println(fmt.Sprintf("ttk::style map %v %v", name,tmp1))
+    return eval(fmt.Sprintf("ttk::style map %v %v", name,tmp1))
+}
+
+// 参考：
+// https://tkdocs.com/tutorial/styles.html
+// http://www.tcl-lang.org/man/tcl8.6/TkCmd/ttk_style.htm
+// https://tkdocs.com/shipman/ttk-map.html
+// 例子：https://github.com/visualfc/atk/issues/17
+
+
 func init() {
 	registerInit(func() {
 		ttk_theme_list, _ = evalAsStringList("ttk::themes")
diff --git a/tk/tooltip.go b/tk/tooltip.go
new file mode 100644
index 0000000..15c188b
--- /dev/null
+++ b/tk/tooltip.go
@@ -0,0 +1,27 @@
+// a simple tooltip
+
+// 参考：http://tmml.sourceforge.net/doc/tcllib/tooltip.html
+
+// 例子：widget.Tooltip("This is a widget")
+
+package tk
+
+import "fmt"
+
+var isPackReqTip = false // 保证 "package require tooltip" 只进行一次
+
+func (w *BaseWidget) Tooltip(tip string) error {
+    
+    // ::tooltip::tooltip pathName ? option arg ? message 
+    // tooltip::tooltip .l "This is a label widget"
+    if !isPackReqTip {
+        
+        _ = eval(fmt.Sprintf("package require tooltip"))
+        // fmt.Printf("package require tooltip ok ? %v\n", ok)
+    }
+    // s1 := fmt.Sprintf("tooltip::tooltip %v {%v}", w.id, tip)
+    // fmt.Printf("s1 is %v\n",s1)
+    return eval(fmt.Sprintf("tooltip::tooltip %v {%v}", w.id, tip))
+}
+
+