This article does the same job as previous. But this one is more object oriented and safer for library consumers. The class is singleton. Your usage of the class is nearly the same as previous, but the class style prevents the users from creating more than one object and you cannot create a dialog object without creating another one
Also I advanced the way that new dialog box is shown.It sets focus to the parent window on activation and you can specify the timed dialog relative to the parent window or you can explicitly specify the new timed dialog's upperleft corner, which will be shown.
There are If you have time you may advance it more
Steps to use; ( I assumed that you wanted to show CAboutDlg for 5 seconds at most ... )
1) include "TimedDialog.h" in your application appropriately.
2) Anywhere in your code , create your dialog object and pass it to the StartTimedDialog function appropriately... There are 2 overaloaded functions... Use the one suitable for you. I prefer the CPoint version generally.
void CDemoDlg::OnButton3()
{
// the relative window version...
CAboutDlg* pDlg = new CAboutDlg();
//create a 5 seconds lasting about dialog at the bottom+10 coordinates of my current window
CTimedDialog::instance()->StartTimedDialog(pDlg, IDD_ABOUTBOX, IDOK, 5, 2, 10);
//static void StartTimedDialog
// (CDialog* pDlg, int DialogID, int iCtrlID, UINT iSecLeft,int iWinLoc = 0, int iDistance = 5);
//CDialog* pDlg, /*the dynamic created dialog variable*/
//int DialogID, /* The Dialog ID*/
//int iCtrlID, /* The dialog control ID eg OK button ID whose text will be counted down*/
//UINT iSecLeft, /* how many seconds will wait until it gets focused or closed automatically
//int iWinLoc relative to the parent window, /*0:top, 1: right, 2:bottom, 3: left*/
//int iDistance /*Distance between the parent and the old dialog*/)
//Winloc identifies new window's location to the parent 0:top, 1: right, 2:bottom, 3: left
}
void CDemoDlg::OnButton4()
{
// CPoint version
CAboutDlg* pDlg = new CAboutDlg();
// create a 5 seconds about dialog at the x:10,y:20 coordinate
CTimedDialog::instance()->StartTimedDialog(pDlg, IDD_ABOUTBOX, IDOK, 5, CPoint(10,20));
//CDialog* pDlg, /*the dynamic created dialog variable*/
//int DialogID, /* The Dialog ID*/
//int iCtrlID, /* The dialog control ID eg OK button ID whose text will be counted down*/
//UINT iSecLeft, /* how many seconds will wait until it gets focused or closed automatically
//CPoint ; the upper left corner of the new created timed dialog box...
}
3) At your custom dialog that will be timedout, you must override these two message handlers... So you can capture the left button is clicked over your dialog and stop timer. But do not forget to delete the object created on the fly above. KillTimedDialog will do this for you automatically if you call it appropriately.
Note : KillTimedDialog and the behind the scenes TimerProc calls DestroyWindow()... You can call KillTimedDialogTimer optionally for visual correctness. But you must have to call KillTimedDialog in a message handler like OnOK. Otherwise memory and handle leaks occur !!!
void CAboutDlg::OnClose()
{
// you must destoy the dynamic dialog object
CTimedDialog::instance()->KillTimedDialog();
}
void CAboutDlg::OnOK()
{
// you must destoy the dynamic dialog object
CTimedDialog::instance()->KillTimedDialog();
}
void CAboutDlg::OnActivate(UINT nState, CWnd* pWndOther, BOOL bMinimized)
{
CDialog::OnActivate(nState, pWndOther, bMinimized);
// kill the timer , the user will examine the dialog...
CTimedDialog::instance()->KillTimedDialogTimer();
}