written by: lore
email: lore at newty dot de
home: www.newty.de
last updated: 25.07.00
About-Dialog with a few lines of text and an animated icon playing pinball with the dialogīs frame. Shows how to move an icon without flickering.
Despite its name, the class is a derived from TWindow. It owns a few static text-fields and a child-window in which the icon is diplayed. This construction prevents flickering. When you just move an icon it would flicker due to instant re-paints. You donīt have this problem when you display it at a fixed position in a child-window and move this child-window arround.
Constructor: parent and title should be clear. font is a pointer to a TFont-object and this font is used for the static text-fields. |
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This function is used to set the texts of the static text-fields. row indicates the text-field. Valid values are from 1 to 4. |
The following code is an excerpt from the projectīs file main.cpp and shows how to instantiate and create an TAbout-Dialog. There is only one function CmAbout() which is called when the user hits the menu-item About.
/****************************************************/
//
// usage of about-dialog TAbout
//
#include "about.h"
/***********************************************************************************************************/
// display about dialog
void mainWnd::CmAbout()
{
TAbout* about = new TAbout(this, "About the program", font); // new dialog and ...
about->Create(); // ... create it
// set the static text-fields of the dialog
char szText[256];
sprintf(szText, "%s - powered by Borland c++ 5.02", prgName);
about->setText(1, szText);
about->setText(2, "testbed for TThreadCtrlDlg, TAsciiData and TAbout");
about->setText(3, "written by lore at newty dot de");
about->setText(4, "free for all kinds of non-commercial use");
about->SetFlag(wfDeleteOnClose); // set flag: dialog is deleted, when it is closed
}
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