121 lines
3.5 KiB
C++
121 lines
3.5 KiB
C++
/*
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* CiderPress
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* Copyright (C) 2007 by faddenSoft, LLC. All Rights Reserved.
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* See the file LICENSE for distribution terms.
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*/
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/*
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* Trivial implementation of a modeless dialog box.
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*/
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#ifndef UTIL_MODELESS_H
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#define UTIL_MODELESS_H
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/*
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* This class must be allocated on the heap, and destroyed by calling
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* DestroyWindow(). Do not delete the object or call EndDialog().
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*
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* To use, call Create(dialogID, pParentWnd). Make sure "visible" is set to
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* "true" in the dialog properties.
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*
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* For "progress" dialogs: immediately before creating the window with Create,
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* disable the main window with EnableWindow(FALSE). That prevents it from
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* getting user input. When you're done, re-enable it with
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* EnableWindow(TRUE), and then DestroyWindow on this object. (If you do it
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* the other way, some other window will get focus, and you have to use
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* SetActiveWindow() to get it back... but that causes a UI flash.) This
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* behavior is now implemented in ExclusiveModelessDialog.
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*/
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class ModelessDialog : public CDialog {
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public:
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ModelessDialog(void) : fOkayToDelete(false) {}
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virtual ~ModelessDialog(void) { ASSERT(fOkayToDelete); }
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/*
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* OK button clicked. Must override to prevent standard EndDialog
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* behavior.
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*/
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virtual void OnOK(void) override {
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if (UpdateData() != FALSE) // try the DDX/DDV stuff, if any
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DestroyWindow();
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}
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/*
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* ESC key hit or Cancel button clicked. Must override to prevent
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* standard EndDialog behavior.
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*/
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virtual void OnCancel(void) override {
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DestroyWindow();
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}
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protected:
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void PostNcDestroy(void) override {
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// this may not arrive immediately
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fOkayToDelete = true;
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delete this;
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}
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private:
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DECLARE_COPY_AND_OPEQ(ModelessDialog)
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bool fOkayToDelete; // sanity check
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};
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/*
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* Variant of ModelessDialog that handles enabling and disabling the parent
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* window.
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*/
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class ExclusiveModelessDialog : public ModelessDialog {
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public:
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ExclusiveModelessDialog(void) : fpParentWnd(NULL) {}
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virtual ~ExclusiveModelessDialog(void) {};
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/* disable the parent window before we're created */
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BOOL Create(int dialogID, CWnd* pParentWnd = NULL) {
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ASSERT(pParentWnd != NULL); // else what's the point?
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if (pParentWnd != NULL) {
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fpParentWnd = pParentWnd;
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fpParentWnd->EnableWindow(FALSE);
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}
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return ModelessDialog::Create(dialogID, pParentWnd);
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}
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/* enable the parent window before we're destroyed */
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virtual BOOL DestroyWindow(void) override {
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if (fpParentWnd != NULL)
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fpParentWnd->EnableWindow(TRUE);
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return ModelessDialog::DestroyWindow();
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}
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private:
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DECLARE_COPY_AND_OPEQ(ExclusiveModelessDialog)
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CWnd* fpParentWnd;
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};
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/*
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From DLGCORE.CPP line 516:
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// disable parent (before creating dialog)
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HWND hWndParent = PreModal(); // ATM: finds parent of modal dlg
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AfxUnhookWindowCreate();
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BOOL bEnableParent = FALSE;
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if (hWndParent != NULL && ::IsWindowEnabled(hWndParent))
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{
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::EnableWindow(hWndParent, FALSE);
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bEnableParent = TRUE;
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}
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[...]
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if (bEnableParent)
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::EnableWindow(hWndParent, TRUE);
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if (hWndParent != NULL && ::GetActiveWindow() == m_hWnd)
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::SetActiveWindow(hWndParent);
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// destroy modal window
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DestroyWindow();
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PostModal();
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*/
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#endif /*UTIL_MODELESS_H*/
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