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Dialogs

Dialogs. Types:. Modal System modal Non modal (modeless). MessageBox. Four parameters: Parent window handle Message to show Title Flags. Modality. MB_APPLMODAL (default) MB_SYSTEMMODAL MB_TASKMODAL. Buttons. MB_ABORTRETRYIGNORE MB_CANCELTRYCONTINUE MB_OK MB_OKCANCEL

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Dialogs

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  1. Dialogs

  2. Types: • Modal • System modal • Non modal (modeless)

  3. MessageBox Four parameters: • Parent window handle • Message to show • Title • Flags

  4. Modality • MB_APPLMODAL (default) • MB_SYSTEMMODAL • MB_TASKMODAL

  5. Buttons • MB_ABORTRETRYIGNORE • MB_CANCELTRYCONTINUE • MB_OK • MB_OKCANCEL • MB_RETRYCANCEL • MB_YESNO • MB_YESNOCANCEL • MB_HELP

  6. Icons • MB_ICONEXCLAMATION • MB_ICONWARNING • MB_ICONINFORMATION • MB_ICONASTERISK • MB_ICONQUESTION (not recommended) • MB_ICONSTOP • MB_ICONERROR • MB_ICONHAND

  7. Dialog window procedure Differences with window:

  8. Modal dialog window • After dialog window procedure is defined, dialog window can be created with functions DialogBox or DialogBoxParam. • Dialog window has two handles: dialog window itself and parent window’s. • DialogBoxParam creates a modal dialog box from a dialog box template resource. It has 5th argument, which is sent to dialog procedure as LPARAM parameter of the WM_INITDIALOG MESSAGE.

  9. Indirect dialog window • Functions DialogBoxIndirect or DialogBoxIndirectParam creates a modal box from a dialog box template • DLGTEMPLATE(EX) structure • DLGITEMTEMPLATE(EX) structure let define individual dialog window

  10. DLGTEMPLATE

  11. With class • WNDCLASS structure can be used to define dialog: • wnd.cbWndWxtra = DLGWINDOWEXTRA; • Register as simple window

  12. Message loop • IsDialogMessage is function used to modify message loop for modeless (not necessarily) dialog boxes

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