Owner drawn button with drop-down menu - C / C++ / MFC Discussion Boards

Bill Wilson16-Nov-01 7:15

16-Nov-01 7:15

Your right, the data held in the dialogs that make up the wizard are no longer accessible. You should have a class that represents the wizard itself. This is the object whose DoModal method is executed. It is still accessible:

Here is a sample from a project I worked on last year. The first listing is the Wizard class itself. It is derived from CPropertySheet. The dialogs it presents are CPropertyPage derived objects. These are stored as member variables in the CWizard object.

Each of the property pages can access the CWizard class (as a parent window). While this one has no actual data stored in it, it could have. In this project, I have the individual property pages store data in project wide globals, so I didn't need to retrieve data from the Wizard itself.

#if !defined(AFX_WIZARD_H__14E36E7B_5840_11D4_BD9F_00B0D0209426__INCLUDED_)
#define AFX_WIZARD_H__14E36E7B_5840_11D4_BD9F_00B0D0209426__INCLUDED_

#if _MSC_VER > 1000
#pragma once
#endif // _MSC_VER > 1000
// Wizard.h : header file
//
#include "Welcomeppg.h"
#include "Detectionppg.h"
#include "ComponentSelectionPpg.h"
#include "ComponentInstallationPpg.h"
#include "installCompletePpg.h"
#include "verifyppg.h"

/////////////////////////////////////////////////////////////////////////////
// CWizard

class CWizard : public CPropertySheet
{
	DECLARE_DYNAMIC(CWizard)

// Construction
public:
	CWizard(UINT nIDCaption, CWnd* pParentWnd = NULL, UINT iSelectPage = 0);
	CWizard(LPCTSTR pszCaption, CWnd* pParentWnd = NULL, UINT iSelectPage = 0);

// Attributes
public:

// Operations
public:

	CWelcomePpg m_ppgWelcome;
	CDetectionPpg m_ppgDetection;
	CComponentSelectionPpg m_ppgComponentSelection;
	CComponentInstallationPpg m_ppgComponentInstallation;
	CInstallCompletePpg m_ppgInstallComplete;
	CVerifyPpg m_ppgVerify;

// Overrides
	// ClassWizard generated virtual function overrides
	//{{AFX_VIRTUAL(CWizard)
	public:
	virtual BOOL OnInitDialog();
	virtual BOOL PreTranslateMessage(MSG* pMsg);
	//}}AFX_VIRTUAL

// Implementation
public:
	virtual ~CWizard();

	// Generated message map functions
protected:
	//{{AFX_MSG(CWizard)
	virtual void OnCancel();
	//}}AFX_MSG
	DECLARE_MESSAGE_MAP()
};

/////////////////////////////////////////////////////////////////////////////

//{{AFX_INSERT_LOCATION}}
// Microsoft Visual C++ will insert additional declarations immediately before the previous line.

#endif // !defined(AFX_WIZARD_H__14E36E7B_5840_11D4_BD9F_00B0D0209426__INCLUDED_)

Re: Property Pages question

RobJones16-Nov-01 11:12

RobJones

16-Nov-01 11:12

Good idea!! I havent tried that yet, and it looks like it should work.

Thanks!

Rob

Re: Property Pages question

RobJones16-Nov-01 11:52

RobJones

16-Nov-01 11:52

All of my wizard pages are derived from the CNewWizPage class so if I try to add a member variable ( Public: CItemDlg m_dItemDlg) inside of my CNewWizPage or CNewWizDialog class it errors... Maybe I should scrap the custom class and derive my own class from CPropertySheet instead.. This is the class I'm using "http://www.codeproject.com/dialog/wizard2000.asp" I dont know if you have tried it..

Just incase im doing something dumb here is what I did.. maybe I'm over looking something..

#if !defined(AFX_NEWWIZDIALOG_H__915D4C89_2E27_11D4_9FA9_0030DB0011C6__INCLUDED_)
#define AFX_NEWWIZDIALOG_H__915D4C89_2E27_11D4_9FA9_0030DB0011C6__INCLUDED_

#if _MSC_VER > 1000
#pragma once
#endif // _MSC_VER > 1000
// NewWizDialog.h : header file
//

#include "ItemDlg.h"
class CNewWizPage;

/////////////////////////////////////////////////////////////////////////////
// CNewWizDialog dialog

class CNewWizDialog : public CDialog
{
// Construction
public:
	CNewWizDialog (LPCTSTR lpszTemplate, CWnd* pParent = NULL);
	CNewWizDialog (UINT nIDTemplate, CWnd* pParent = NULL);
	virtual ~CNewWizDialog ();


// Attributes
public:


protected:
	CObList m_PageList; // this list of CNewWizPage objects
	UINT m_nPlaceholderID; // control ID for the palceholder


// Operations
public:
	CItemDlg m_dItemDlg;
	void AddPage(CNewWizPage* pPage, UINT nID);
	void SetActivePageByResource(UINT nResourceID);
	BOOL SetFirstPage();
	void SetNextPage();
	void EnableFinish(BOOL bEnable);
	void EnableBack(BOOL bEnable);
	void EnableNext(BOOL bEnable);
	int GetActiveIndex() const;
	int GetPageIndex(CNewWizPage* pPage) const;
	int GetPageCount();
	CNewWizPage* GetPage(int nPage) const;
	BOOL SetActivePage(int nPage);
	BOOL SetActivePage(CNewWizPage* pPage);
	void SetTitle(LPCTSTR lpszText);
	void SetTitle(UINT nIDText);
	void SetFinishText(LPCTSTR lpszText);
	void SetFinishText(UINT nIDText);

protected:
	BOOL ActivatePage(CNewWizPage* pPage);
	BOOL DeactivatePage();
	void SetPlaceholderID(int nPlaceholderID);
	CNewWizPage* GetPageByResourceID(UINT nResourceID);


private:
	void Init();
	BOOL DestroyPage(CNewWizPage* pPage);
	CNewWizPage* GetFirstPage();
	CNewWizPage* GetLastPage();
	CNewWizPage* GetActivePage() const;
	CNewWizPage* GetNextPage();


// Overrides
	// ClassWizard generated virtual function overrides
	//{{AFX_VIRTUAL(CNewWizDialog)
	protected:
	virtual void DoDataExchange(CDataExchange* pDX);    // DDX/DDV support
	virtual BOOL OnInitDialog();
	//}}AFX_VIRTUAL

// Implementation
protected:

	// Generated message map functions
	//{{AFX_MSG(CNewWizDialog)
	afx_msg void OnDestroy();
	afx_msg void OnWizardFinish();
	afx_msg void OnWizardBack(); 
	afx_msg void OnWizardNext(); 
	afx_msg void OnCancel(); 
	//}}AFX_MSG
	DECLARE_MESSAGE_MAP()
};

//{{AFX_INSERT_LOCATION}}
// Microsoft Visual C++ will insert additional declarations immediately before the previous line.

#endif // !defined(AFX_NEWWIZDIALOG_H__915D4C89_2E27_11D4_9FA9_0030DB0011C6__INCLUDED_)

Heres where it errors with an error of "e:\Wizard\itemdlg.h(22) : error C2065: 'IDD_ITEM' : undeclared identifier
e:\Wizard\itemdlg.h(22) : error C2057: expected constant expression"

class CItemDlg : public CNewWizPage
{
// Construction
public:
	CItemDlg(CWnd* pParent = NULL);   // standard constructor

// Dialog Data
	//{{AFX_DATA(CItemDlg)
	enum { IDD = IDD_ITEM };  <-- HERE 
	CString	m_strPassword;
	CString	m_strVpassword;
	CString	m_strItem;
	CString	m_strName;
	//}}AFX_DATA


// Overrides

Any ideas?

Rob

Re: Property Pages question

Bill Wilson16-Nov-01 13:12

Bill Wilson

16-Nov-01 13:12

I've not used this class (or 2wK wizards). so, I don't have any specific information for you. Just these general questions. Blush | :O

Where is IDD_ITEM defined? is it the resource id for your dialog? Make sure its defined in the context of ItemDlg.h.

Re: Property Pages question

RobJones16-Nov-01 13:15

RobJones

16-Nov-01 13:15

It's the resource ID of my 1st page dialog of the wizard.. and its only defined in resource.h.. I just defined it in my ItemDlg.h and it seems to compile fine now.. Blush | :O

Thanks for all your help man!!

Rob

RAS events

15-Nov-01 4:24

Hi
is there any RAS event that is fired when a user just connected to or disconnected from the internet using the dial-up network?

thanks

Re: RAS events

Masaaki Onishi15-Nov-01 17:07

Masaaki Onishi

15-Nov-01 17:07

Hello, the codegurus around the world.;)

Check the RAS notification message called WM_RASDIALEVENT,
and check WPARAM wParam to figure out which RAS event occures.

Good luck! Cool | :cool:

Have a nice day!

-Masaaki Onishi-

Owner drawn button with drop-down menu

Derek Lakin15-Nov-01 3:35

Derek Lakin

15-Nov-01 3:35

As some of you may be aware I have an owner drawn button class (CButtonSSL), which is capable of displaying a drop-down arrow and a menu.

I have recently discovered that if the parent window of the button loses focus then when focus is regained the check state of the menu items is lost, i.e. none of the menu items are checked any more Frown | :(

For those of you without the source code the class stores a CMenu member variable, m_menu. In the call to SetSSLButtonMenu the menu is initialised with a call to m_menu.LoadMenu passing in the resource ID of the menu. The menu item check states are altered in the call to CheckSSLMenuItem which calls m_menu.CheckMenuItem () passing in the menu ID and the check state.

In the OnLButtonDown event handler the popup menu is shown as follows:

CMenu* pMenu = m_menu.GetSubMenu (0);
pMenu->TrackPopupMenu (TPM_RIGHTALIGN | TPM_LEFTBUTTON, x, y, GetParent ());

I have scoured the MSDN and other such resources and get work out why the menu would be losing it's check states. Any suggestions?

Derek Lakin.
Salamander Software Ltd.

When to delete, and when to NULL?

Chambers15-Nov-01 3:33

Chambers

15-Nov-01 3:33

Hi all, I have got a little lost with regards to pointers. I think its quite simple (if you know the answer), basically I have some code like :

void NewPointer()
{
  if (m_pPointer == NULL)
  {
    m_pPointer = new(MyCPointClass)
    if (m_pPointer->NewPoint)
      return;
    else
      delete(m_pPointer);
  }
}

However, the pointer is deleted in this function, and then its deleted elsewhere in my program through a destructor (which is called when i exit the app). If the BOOL function NewPoint returns TRUE every time then everything is OK (my app doesn`t try to delete the same pointer twice). HOWEVER, it does if it returns FALSE. Basically I need to know if a memory leak would occur if I inserted :

m_pPointer = NULL;

instead of actually deleting it in the function? What actually happens to the memory allocated by new in this case? The reason I ask is because, although my program WOULD expel any memory leaks upon exiting the program, I don`t want them building up whilst I am running the damn thing, because in the end I could run out of memory. So, basically, what I need to know is, if I make the m_pPointer = NULL, will a memory leak occur, and why/why not? Thanks again guys for your intuition,

Cheers,
Alan. Smile | :)

"When I left you I was but the learner, now I am the Master" - Darth Vader Mad | :mad: