pure virtual function call error

BlitzMax Forums/BlitzMax Beginners Area/pure virtual function call error

(maxgui)
i don't understand why bmax crash with this error (output window) :
runtime error R6025 - pure virtual function call

To reproduce the error. Right click and close the second window !

Many thanks for your help !

' ==================================================================================================
'
' Auteur : hubert.bayre@...
' Nom    : tracer.mbx
' Date création : fevrier 2006
' Date dernière modification : ....
' Description : editeur de map pour zigwigwi blaster
' Note        : utilise maxgui.
'
' ==================================================================================================

	Strict 
	
	Const MENU_OUVRIR=101
	Const MENU_SAUVER=102
	Const MENU_QUITTER=103
	Const MENU_ABOUT = 104
	Const MENU_CHARGER_MAP = 105
	
	Const WWX = 1024
	Const WWY = 768

' -------------------------------------------------------------------------------------------

	Global Win1:TGadget=CreateWindow("zigwigwis : editeur de map",0,0,WWX,WWY, Null, WINDOW_MENU|WINDOW_TITLEBAR)
	
	Global panel:Tgadget = CreatePanel(10,10,WWX-40,WWY-80,Win1,PANEL_ACTIVE)
	SetGadgetLayout panel,1,1,1,1
	SetPanelColor panel,100,0,200
	
	Global sv:Tgadget = CreateSlider(WWX-30,10,20,WWY-80,Win1,SLIDER_VERTICAL)
	Global sh:Tgadget = CreateSlider(10,WWY-70,WWX-40,20,Win1,SLIDER_HORIZONTAL)
	Global canvas:TGadget = CreateCanvas(0,0,WWX,WWY,panel)
	
	SetSliderRange sv,ClientWidth(panel),GadgetWidth(canvas)
	SetSliderRange sh,ClientHeight(panel),GadgetHeight(canvas)
	
	Global filemenu:TGadget = CreateMenu("&Menu",0,WindowMenu(Win1))
	CreateMenu"&Ouvrir",MENU_OUVRIR,filemenu,KEY_O,MODIFIER_COMMAND
	CreateMenu"&Sauvegarder", MENU_SAUVER, filemenu, KEY_S, MODIFIER_COMMAND
	CreateMenu "",0, filemenu
	CreateMenu"&A propos",MENU_ABOUT,filemenu,KEY_A,MODIFIER_COMMAND
	CreateMenu "",0, filemenu
	CreateMenu"&Quitter",MENU_QUITTER,filemenu,KEY_F4,MODIFIER_COMMAND
	UpdateWindowMenu Win1
	
' -------------------------------------------------------------------------------------------

	Global Win2:TGadget   = CreateWindow("Selection de map",40,40,670,400,Null,WINDOW_MENU|WINDOW_TITLEBAR)
	Global Canvas2:TGadget= CreateCanvas(10,10,640,320,Win2)

	Global Menu:TGadget = CreateMenu("&Menu",0,WindowMenu(Win2))
	CreateMenu"&Charger map",MENU_CHARGER_MAP,Menu, KEY_O,MODIFIER_COMMAND
	UpdateWindowMenu Win2

' -------------------------------------------------------------------------------------------

	Global Tiles:TPixmap = CreatePixmap (640,320, PF_RGBA8888)
	Global Ecran:TPixmap = CreatePixmap (1024,768, PF_RGBA8888)
	
	Global MapTileX : Int
	Global MapTileY : Int
	
	Global hImagePointeur : Timage = LoadImage ("pointeur.png")
	
	Global mx, my
	
	Global Liste_Tiles : TList = CreateList()

' -------------------------------------------------------------------------------------------

Type TTile

	Field x : Int
	Field y : Int
	Field Modele_x : Int
	Field Modele_y : Int
	
	' ---------------------------------------------------------------------------------------
	
	Function Creer:TTile ()
	
		Local t : TTile = New TTile 
		
		t.x = mx / 32
		t.y = my / 32
			
		t.Modele_x = MapTileX * 32
		t.Modele_y = MapTileX * 32
		
		ListAddLast Liste_Tiles, t
		
		Return t
		
	End Function
	
	' ---------------------------------------------------------------------------------------
	
	Method Afficher_sur_ecran ()
	
		For Local i=0 To 31
			For Local j = 0 To 31
			    Local p = ReadPixel (Tiles, Modele_x*32+i, Modele_y*32+j)
				WritePixel (Ecran, x+i,y+j,p)
			Next
		Next		
		
	End Method
	
	' ---------------------------------------------------------------------------------------
		
	Function Afficher_toutes (x : Int, y : Int, w : Int, h : Int)
	
		For Local t:TTile = EachIn Liste_tiles
			If (t.y >= y And t.y < y + h) Then
				If (t.x >=x And t.x < x + w) Then
					t.Afficher_sur_ecran()
				End If
			End If
		Next
	
	End Function
	
	' ---------------------------------------------------------------------------------------

End Type

' -------------------------------------------------------------------------------------------

Function Afficher_grille()

	Local x
	Local y
	
	SetColor 50,50,50
	For x=0 To WWX Step 32
		DrawLine x, 0, x, WWY
	Next
	For y=0 To WWY Step 32
		DrawLine 0, y, WWX, y
	Next

End Function

' -------------------------------------------------------------------------------------------

Function Fenetre_choix_tile()

	ActivateWindow(Win2)
	
	Local lmx, lmy
	Local ox, oy
	
	While WaitEvent()
	
			SetGraphics CanvasGraphics(canvas2)
				Cls
				SetColor 255,255,255
				DrawPixmap Tiles, 0,0
				Afficher_grille()
				
				SetColor 0,255,0
				DrawImage hImagePointeur, ox*32,oy*32
				
				SetColor 255,0,0
				DrawImage hImagePointeur, MapTileX*32,MapTileY*32
			
				SetColor 255,255,255
				DrawText "x=" + String(ox) + ",y=" + String(oy) ,0,0
				Flip
		
	
		Select EventID()

			Case EVENT_WINDOWCLOSE
				FreeGadget win1 
				Exit
				
			Case EVENT_MOUSEMOVE

				lmx = EventX() 
				lmy = EventY()
				
				ox = lmx / 32
				oy = lmy / 32
				
			Case EVENT_MOUSEDOWN
			
				If EventData() = 1 Then
				
					MapTileX = ox
					MapTileY = oy
					
				End If																																																																																														
				
			Case EVENT_MENUACTION
		
				Select EventData()
			
					Case MENU_CHARGER_MAP

					Local filter$ = "Fichiers graphiques png:png"
					Local filename$ = RequestFile( "Sélectionnez un fichier",filter$ )										
					If filename$ <> "" Then
						Tiles = LoadPixmap (Filename$)
					End If
				End Select
					
		End Select
	Wend

	HideGadget(win2)
	
End Function

' ----------------------------------------------------------------------------------------------

Local filter$
Local FileName$

ActivateWindow (Win1)

While WaitEvent()

	SetGraphics CanvasGraphics(canvas)
	Cls
	SetColor 255,255,255
	TTile.Afficher_toutes (0, 0, 32, 24)
	DrawPixmap Ecran , 0,0
	Afficher_grille()
	
	Flip
	
	Select EventID()

		Case EVENT_GADGETPAINT
			SetGadgetShape canvas,-SliderValue(sh),-SliderValue(sv),GadgetWidth(canvas),GadgetHeight(canvas)

		Case EVENT_MOUSEDOWN
			 SetGraphics CanvasGraphics(canvas)
			 SetColor 255,255,255
			
			If EventData() = 2 Then
				Fenetre_choix_tile()
			End If
			
			If EventData() = 1 Then
				TTile.Creer()
				Notify "Tile créée"
			End If
			
		Case EVENT_MOUSEMOVE

			mx = EventX() 
			my = EventY()
			
			SetSliderRange sh,ClientWidth(panel),GadgetWidth(canvas)
			SetSliderRange sv,ClientHeight(panel),GadgetHeight(canvas)
			SetGadgetShape canvas,-SliderValue(sh),-SliderValue(sv),GadgetWidth(canvas),GadgetHeight(canvas)
			
		Case EVENT_MENUACTION
		
			Select EventData()
			
				Case MENU_OUVRIR
	
					filter$ = "Fichiers de données Map:map"
					filename$ = RequestFile( "Sélectionnez un fichier",filter$ )
			
				Case MENU_SAUVER
		
					filename$=RequestFile( "Enregistrer un fichier",filter$, True, filename$ )
					If filename$ <> "" Then
						filter$="Fichiers de données Map Files:map"
					End If
					
				Case MENu_ABOUT
					Notify "Editeur de map - Hubert BAYRE - 2006."
					
				Case MENU_QUITTER
					Local Reponse = Confirm ("Voulez vous vraiment quitter")
					If Reponse Then
						FreeGadget canvas
						End
					End If
					
			End Select

		Case EVENT_WINDOWCLOSE
		
			Local Reponse = Confirm ("Voulez vous vraiment quitter")
			If Reponse Then
				FreeGadget canvas
				End
			End If

		Case EVENT_APPTERMINATE
			End
	End Select

	
Wend

' ==================================================================================================
'
' FIN DU FICHIER
'
' ==================================================================================================

Scott Shaver

I don't get that error I do get a null pointer access error though:

	While WaitEvent()
	
			SetGraphics CanvasGraphics(canvas2)
				Cls
				SetColor 255,255,255
				DrawPixmap Tiles, 0,0
				Afficher_grille()
				
				SetColor 0,255,0

*********** DIES HERE *************
				DrawImage hImagePointeur, ox*32,oy*32
				
				SetColor 255,0,0
				DrawImage hImagePointeur, MapTileX*32,MapTileY*32
			
				SetColor 255,255,255
				DrawText "x=" + String(ox) + ",y=" + String(oy) ,0,0
				Flip

because hImagePointeur is null

where is the pointeur.png image?

Scott Shaver

okay added my own and now I get the error

Scott Shaver

I don't why but the problem is the freegadget win1 call, comment it out.

Function Fenetre_choix_tile()
...
			Case EVENT_WINDOWCLOSE
				'FreeGadget win1 
				Exit
....

Koriolis

That should be "FreeGadget win2", looks like the usual copy/paste error

hub

' ==================================================================================================
'
' Auteur : hubert.bayre@...
' Nom    : tracer.mbx
' Date création : fevrier 2006
' Date dernière modification : ....
' Description : editeur de map pour zigwigwi blaster
' Note        : utilise maxgui.
'
' ==================================================================================================

	Strict 
	
	Const MENU_OUVRIR=101
	Const MENU_SAUVER=102
	Const MENU_QUITTER=103
	Const MENU_ABOUT = 104
	Const MENU_CHARGER_MAP = 105
	
	Const WWX = 1024
	Const WWY = 768

' -------------------------------------------------------------------------------------------

	Global Win1:TGadget=CreateWindow("zigwigwis : editeur de map",0,0,WWX,WWY, Null, WINDOW_MENU|WINDOW_TITLEBAR)
	
	Global panel:Tgadget = CreatePanel(10,10,WWX-40,WWY-80,Win1,PANEL_ACTIVE)
	SetGadgetLayout panel,1,1,1,1
	SetPanelColor panel,100,0,200
	
	Global sv:Tgadget = CreateSlider(WWX-30,10,20,WWY-80,Win1,SLIDER_VERTICAL)
	Global sh:Tgadget = CreateSlider(10,WWY-70,WWX-40,20,Win1,SLIDER_HORIZONTAL)
	Global canvas:TGadget = CreateCanvas(0,0,WWX,WWY,panel)
	
	SetSliderRange sv,ClientWidth(panel),GadgetWidth(canvas)
	SetSliderRange sh,ClientHeight(panel),GadgetHeight(canvas)
	
	Global filemenu:TGadget = CreateMenu("&Menu",0,WindowMenu(Win1))
	CreateMenu"&Ouvrir",MENU_OUVRIR,filemenu,KEY_O,MODIFIER_COMMAND
	CreateMenu"&Sauvegarder", MENU_SAUVER, filemenu, KEY_S, MODIFIER_COMMAND
	CreateMenu "",0, filemenu
	CreateMenu"&A propos",MENU_ABOUT,filemenu,KEY_A,MODIFIER_COMMAND
	CreateMenu "",0, filemenu
	CreateMenu"&Quitter",MENU_QUITTER,filemenu,KEY_F4,MODIFIER_COMMAND
	UpdateWindowMenu Win1
	
' -------------------------------------------------------------------------------------------

	Global Tiles:TPixmap = CreatePixmap (640,320, PF_RGBA8888)
	Global Ecran:TPixmap = CreatePixmap (1024,768, PF_RGBA8888)
	
	Global MapTileX : Int
	Global MapTileY : Int
	
	Global hImagePointeur : Timage = LoadImage ("pointeur.png")
	
	Global mx, my
	
	Global Liste_Tiles : TList = CreateList()

' -------------------------------------------------------------------------------------------

Type TTile

	Field x : Int
	Field y : Int
	Field Modele_x : Int
	Field Modele_y : Int
	
	' ---------------------------------------------------------------------------------------
	
	Function Creer:TTile ()
	
		Local t : TTile = New TTile 
		
		t.x = mx / 32
		t.y = my / 32
			
		t.Modele_x = MapTileX * 32
		t.Modele_y = MapTileX * 32
		
		ListAddLast Liste_Tiles, t
		
		Return t
		
	End Function
	
	' ---------------------------------------------------------------------------------------
	
	Method Afficher_sur_ecran ()
	
		For Local i=0 To 31
			For Local j = 0 To 31
			    Local p = ReadPixel (Tiles, Modele_x*32+i, Modele_y*32+j)
				WritePixel (Ecran, x+i,y+j,p)
			Next
		Next		
		
	End Method
	
	' ---------------------------------------------------------------------------------------
		
	Function Afficher_toutes (x : Int, y : Int, w : Int, h : Int)
	
		For Local t:TTile = EachIn Liste_tiles
			If (t.y >= y And t.y < y + h) Then
				If (t.x >=x And t.x < x + w) Then
					t.Afficher_sur_ecran()
				End If
			End If
		Next
	
	End Function
	
	' ---------------------------------------------------------------------------------------

End Type

' -------------------------------------------------------------------------------------------

Function Afficher_grille()

	Local x
	Local y
	
	SetColor 50,50,50
	For x=0 To WWX Step 32
		DrawLine x, 0, x, WWY
	Next
	For y=0 To WWY Step 32
		DrawLine 0, y, WWX, y
	Next

End Function

' -------------------------------------------------------------------------------------------

Function Fenetre_choix_tile()

	Local Win2:TGadget   = CreateWindow("Selection de map",40,40,670,400,Null,WINDOW_MENU|WINDOW_TITLEBAR)
	Local Canvas2:TGadget= CreateCanvas(10,10,640,320,Win2)

	Local Menu:TGadget = CreateMenu("&Menu",0,WindowMenu(Win2))
	CreateMenu"&Charger map",MENU_CHARGER_MAP,Menu, KEY_O,MODIFIER_COMMAND
	UpdateWindowMenu Win2

	'ActivateWindow(Win2)
	
	Local lmx, lmy
	Local ox, oy
	
	While WaitEvent()
	
				SetGraphics CanvasGraphics(canvas2)
				Cls
				SetColor 255,255,255
				DrawPixmap Tiles, 0,0
				Afficher_grille()
				
				SetColor 0,255,0
				DrawImage hImagePointeur, ox*32,oy*32
				
				SetColor 255,0,0
				DrawImage hImagePointeur, MapTileX*32,MapTileY*32
			
				SetColor 255,255,255
				DrawText "x=" + String(ox) + ",y=" + String(oy) ,0,0
				Flip
		
	
		Select EventID()

			Case EVENT_WINDOWCLOSE
				Exit
								
			Case EVENT_MOUSEMOVE

				lmx = EventX() 
				lmy = EventY()
				
				ox = lmx / 32
				oy = lmy / 32
				
			Case EVENT_MOUSEDOWN
			
				If EventData() = 1 Then
				
					MapTileX = ox
					MapTileY = oy
					
				End If																																																																																														
				
			Case EVENT_MENUACTION
		
				Select EventData()
			
					Case MENU_CHARGER_MAP

					Local filter$ = "Fichiers graphiques png:png"
					Local filename$ = RequestFile( "Sélectionnez un fichier",filter$ )										
					If filename$ <> "" Then
						Tiles = LoadPixmap (Filename$)
					End If
				End Select
					
		End Select
	Wend
	
	FreeGadget menu
	FreeGadget Canvas2
	FreeGadget win2
	
End Function

' ----------------------------------------------------------------------------------------------

Local filter$
Local FileName$

While WaitEvent()

		SetGraphics CanvasGraphics(canvas)
		Cls ' <----- CRASH HERE !!!
		SetColor 255,255,255
		TTile.Afficher_toutes (0, 0, 32, 24)
		DrawPixmap Ecran , 0,0
		Afficher_grille()
		Flip		

	Select EventID()
	
		Case EVENT_GADGETPAINT
	
			SetGadgetShape canvas,-SliderValue(sh),-SliderValue(sv),GadgetWidth(canvas),GadgetHeight(canvas)

		Case EVENT_MOUSEDOWN
			
			If EventData() = 2 Then
				Fenetre_choix_tile()
				Notify "revenu ici"
			End If
			
			If EventData() = 1 Then
				TTile.Creer()
				Notify "Tile créée"
			End If
			
		Case EVENT_MOUSEMOVE

			mx = EventX() 
			my = EventY()
			
			SetSliderRange sh,ClientWidth(panel),GadgetWidth(canvas)
			SetSliderRange sv,ClientHeight(panel),GadgetHeight(canvas)
			SetGadgetShape canvas,-SliderValue(sh),-SliderValue(sv),GadgetWidth(canvas),GadgetHeight(canvas)
			
		Case EVENT_MENUACTION
		
			Select EventData()
			
				Case MENU_OUVRIR
	
					filter$ = "Fichiers de données Map:map"
					filename$ = RequestFile( "Sélectionnez un fichier",filter$ )
			
				Case MENU_SAUVER
		
					filename$=RequestFile( "Enregistrer un fichier",filter$, True, filename$ )
					If filename$ <> "" Then
						filter$="Fichiers de données Map Files:map"
					End If
					
				Case MENu_ABOUT
					Notify "Editeur de map - Hubert BAYRE - 2006."
					
				Case MENU_QUITTER
					Local Reponse = Confirm ("Voulez vous vraiment quitter")
					If Reponse Then
						FreeGadget canvas
						End
					End If
					
			End Select

		Case EVENT_WINDOWCLOSE
		
			Local Reponse = Confirm ("Voulez vous vraiment quitter")
			If Reponse Then
				FreeGadget canvas
				End
			End If

		Case EVENT_APPTERMINATE
			End
	End Select

	
Wend

exit correctly from the win2 but now i've an crash error with the 'cls' line !!!!

SetGraphics CanvasGraphics(canvas)
cls <----- crash here !

RrrrrrrRRRRR.

degac

I red your program and I think the error is the fact you are freeing the windows. Try simply to Hide the window you don't need to use, because when you free it you lose all the gadget in it...(not tested anything at the moment)