wxWidgets - Sizers

After much trawling through the wxWidgets source code... :-p ... it seems that a wxGridSizer is doesn't care if you are showing an item or not.

Instead, try using a wxFlexGridSizer, which is a subclass of wxGridSizer. You also need to call Fit() on your window to get it to recalculate itself.

Example :

hidden.bmx

'
' Example application stub generated by wxCodeGen v1.10 : 01 Sep 2008 10:44:15
'
SuperStrict

Framework wx.wxApp

Import "hiddengen.bmx"

New MyApp.run()

Type MyApp Extends wxApp

	Method OnInit:Int()

		Local frame:MyFrame1 = MyFrame1(New MyFrame1.Create())
		frame.Centre()
		
		frame.Show()

		Return True
	End Method

End Type



Type MyFrame1 Extends MyFrame1Base

	Field flag:Int = False
	
	Method OnInit()
		Super.OnInit()

		' hide some buttons
		gSizer1.Show(m_button2, False)
		gSizer1.Show(m_button3, False)
		gSizer1.Show(m_button4, False)
		gSizer1.Show(m_button5, False)
		gSizer1.Show(m_button6, False)
		gSizer1.Show(m_button7, False)
		gSizer1.Show(m_button8, False)
		gSizer1.Show(m_button9, False)
		
		gSizer1.Layout()
		
		' snap to fit...
		Fit()
	End Method

	Method OnShowHide(event:wxCommandEvent)
		flag = Not flag
		gSizer1.Show(m_button9 , flag)
		
		gSizer1.Layout()
		
		' snap to fit...
		Fit()
	End Method

End Type

hiddengen.bmx

'
' BlitzMax code generated with wxCodeGen v1.10 : 01 Sep 2008 11:53:49
' 
' 
' PLEASE DO "NOT" EDIT THIS FILE!
' 
SuperStrict

Import wx.wxButton
Import wx.wxFrame
Import wx.wxWindow


Type MyFrame1Base Extends wxFrame

	Field m_button10:wxButton
	Field gSizer1:wxFlexGridSizer
	Field m_button1:wxButton
	Field m_button2:wxButton
	Field m_button3:wxButton
	Field m_button4:wxButton
	Field m_button5:wxButton
	Field m_button6:wxButton
	Field m_button7:wxButton
	Field m_button8:wxButton
	Field m_button9:wxButton


	Method Create:MyFrame1Base(parent:wxWindow = Null,id:Int = wxID_ANY, title:String = "", x:Int = -1, y:Int = -1, w:Int = -1, h:Int = -1, style:Int = wxDEFAULT_FRAME_STYLE|wxTAB_TRAVERSAL)
		return MyFrame1Base(Super.Create(parent, id, title, x, y, w, h, style))
	End Method

	Method OnInit()

		Local bSizer1:wxBoxSizer
		bSizer1 = new wxBoxSizer.Create(wxHORIZONTAL)


		Local bSizer2:wxBoxSizer
		bSizer2 = new wxBoxSizer.Create(wxVERTICAL)

		m_button10 = new wxButton.Create(Self, wxID_ANY, "Click to toggle")
		bSizer2.Add(m_button10, 0, wxALL, 5)

		bSizer1.AddSizer(bSizer2, 0, wxEXPAND, 5)


		gSizer1 = new wxFlexGridSizer.CreateRC(3, 3, 0, 0)
		gSizer1.SetFlexibleDirection( wxBOTH )
		gSizer1.SetNonFlexibleGrowMode( wxFLEX_GROWMODE_SPECIFIED )

		m_button1 = new wxButton.Create(Self, wxID_ANY, "1,1")
		gSizer1.Add(m_button1, 0, wxALL, 5)

		m_button2 = new wxButton.Create(Self, wxID_ANY, "2,1")
		gSizer1.Add(m_button2, 0, wxALL, 5)

		m_button3 = new wxButton.Create(Self, wxID_ANY, "3,1")
		gSizer1.Add(m_button3, 0, wxALL, 5)

		m_button4 = new wxButton.Create(Self, wxID_ANY, "1,2")
		gSizer1.Add(m_button4, 0, wxALL, 5)

		m_button5 = new wxButton.Create(Self, wxID_ANY, "2,2")
		gSizer1.Add(m_button5, 0, wxALL, 5)

		m_button6 = new wxButton.Create(Self, wxID_ANY, "3,2")
		gSizer1.Add(m_button6, 0, wxALL, 5)

		m_button7 = new wxButton.Create(Self, wxID_ANY, "1,3")
		gSizer1.Add(m_button7, 0, wxALL, 5)

		m_button8 = new wxButton.Create(Self, wxID_ANY, "2,3")
		gSizer1.Add(m_button8, 0, wxALL, 5)

		m_button9 = new wxButton.Create(Self, wxID_ANY, "3,3")
		gSizer1.Add(m_button9, 0, wxALL, 5)

		bSizer1.AddSizer(gSizer1, 1, wxEXPAND, 5)

		SetSizer(bSizer1)
		Layout()
		bSizer1.Fit(Self)

		m_button10.ConnectAny(wxEVT_COMMAND_BUTTON_CLICKED, _OnShowHide, Null, Self)
	End Method

	Function _OnShowHide(event:wxEvent)
		MyFrame1Base(event.sink).OnShowHide(wxCommandEvent(event))
	End Function

	Method OnShowHide(event:wxCommandEvent)
		DebugLog "Please override MyFrame1.OnShowHide()"
		event.Skip()
	End Method

End Type

:o)