[BUG] Crash when trying to resize the control.

[wsndshx]

What I did:

• Write a file
• Debug and run the program
• At the beginning the program works fine
• But when I move the mouse to the bottom of the TableView and find that I can adjust the height at this point, I click the mouse and drag it up and down
  
• There is a crash

Crash message:

"runtime error: invalid memory address or nil pointer dereference"
Stack:
	 4  0x0000000000614d3f in github.com/lxn/walk.(*Splitter).onInsertedWidget.func3.3
	     at C:/Users/zzlwd/go/pkg/mod/github.com/lxn/walk@v0.0.0-20210112085537-c389da54e794/splitter.go:426
	 5  0x00000000005fe97a in github.com/lxn/walk.(*MouseEventPublisher).Publish
	     at C:/Users/zzlwd/go/pkg/mod/github.com/lxn/walk@v0.0.0-20210112085537-c389da54e794/mouseevent.go:69
	 6  0x00000000006579fc in github.com/lxn/walk.(*WindowBase).publishMouseEvent
	     at C:/Users/zzlwd/go/pkg/mod/github.com/lxn/walk@v0.0.0-20210112085537-c389da54e794/window.go:2054
	 7  0x000000000065a0c9 in github.com/lxn/walk.(*WindowBase).WndProc
	     at C:/Users/zzlwd/go/pkg/mod/github.com/lxn/walk@v0.0.0-20210112085537-c389da54e794/window.go:2382
	 8  0x0000000000616545 in github.com/lxn/walk.(*splitterHandle).WndProc
	     at C:/Users/zzlwd/go/pkg/mod/github.com/lxn/walk@v0.0.0-20210112085537-c389da54e794/splitterhandle.go:69
	 9  0x000000000065839e in github.com/lxn/walk.defaultWndProc
	     at C:/Users/zzlwd/go/pkg/mod/github.com/lxn/walk@v0.0.0-20210112085537-c389da54e794/window.go:2159
	(truncated)

My question:

Is it because I'm dragging the bottom element, causing the bottom element to be larger than the program can display? Or is it related to this issue #597?

My Code

func mainWin() {
	var mainwin *walk.MainWindow
	mw := &CondomMainWindow{model: NewCondomModel()}

	if err := (MainWindow{
		AssignTo: &mainwin,
		Size:     Size{Width: 800, Height: 100},
		Layout:   VBox{},
		Children: []Widget{
			HSplitter{
				Children: []Widget{
					VSplitter{
						Children: []Widget{
							GroupBox{
								Layout: HBox{},
								Title:  "应用设置",
								Children: []Widget{
									LinkLabel{
										Text: "频率：",
									},
									NumberEdit{
										MinSize:  Size{Width: 20},
										MaxSize:  Size{Width: 30},
										MinValue: 10,
										MaxValue: 120,
									},
									LinkLabel{
										Text: "秒",
									},
									HSpacer{},
								},
							},
							TableView{
								MaxSize:  Size{Height: 300},
								MinSize:  Size{Width: 450},
								AssignTo: &mw.tv,
								// CheckBoxes:       true,
								ColumnsOrderable: true,
								// MultiSelection:   true,
								Columns: []TableViewColumn{
									// ......
								},
								Model: mw.model,
							},
							VSpacer{},
						},
					},
				},
			},
		},
	}).Create(); err != nil {
		log.Fatal(err)
	}

	mainwin.Run()
}

[iquanxin]

应该是你的代码逻辑问题