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// Copyright 2008, Google Inc.
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following disclaimer
// in the documentation and/or other materials provided with the
// distribution.
// * Neither the name of Google Inc. nor the names of its
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#ifndef CHROME_VIEWS_DIALOG_DELEGATE_H__
#define CHROME_VIEWS_DIALOG_DELEGATE_H__
#include "chrome/views/dialog_client_view.h"
#include "chrome/views/window_delegate.h"
namespace ChromeViews {
class NativeButton;
class View;
///////////////////////////////////////////////////////////////////////////////
//
// DialogDelegate
//
// DialogDelegate is an interface implemented by objects that wish to show a
// dialog box Window. The window that is displayed uses this interface to
// determine how it should be displayed and notify the delegate object of
// certain events.
//
///////////////////////////////////////////////////////////////////////////////
class DialogDelegate : public WindowDelegate {
public:
virtual DialogDelegate* AsDialogDelegate() { return this; }
enum DialogButton {
DIALOGBUTTON_NONE = 0, // No dialog buttons, for WindowType == WINDOW.
DIALOGBUTTON_OK = 1, // Has an OK button.
DIALOGBUTTON_CANCEL = 2, // Has a Cancel button (becomes a Close button if
}; // no OK button).
// Returns a mask specifying which of the available DialogButtons are visible
// for the dialog. Note: If an OK button is provided, you should provide a
// CANCEL button. A dialog box with just an OK button is frowned upon and
// considered a very special case, so if you're planning on including one,
// you should reconsider, or beng says there will be stabbings.
//
// To use the extra button you need to override GetDialogButtons()
virtual int GetDialogButtons() const {
return DIALOGBUTTON_OK | DIALOGBUTTON_CANCEL;
}
// Returns whether accelerators are enabled on the button. This is invoked
// when an accelerator is pressed, not at construction time. This
// returns true.
virtual bool AreAcceleratorsEnabled(DialogButton button) { return true; }
// Returns the label of the specified DialogButton.
virtual std::wstring GetDialogButtonLabel(DialogButton button) const {
// empty string results in defaults for DIALOGBUTTON_OK,
// DIALOGBUTTON_CANCEL.
return L"";
}
// Override this function if with a view which will be shown in the same
// row as the OK and CANCEL buttons but flush to the left and extending
// up to the buttons.
virtual ChromeViews::View* GetExtraView() { return NULL; }
// Returns the default dialog button. This should not be a mask as only one
// button should ever be the default button. Return DIALOGBUTTON_NONE if
// there is no default.
virtual int GetDefaultDialogButton() const {
return DIALOGBUTTON_OK;
}
// Returns whether the specified dialog button is enabled.
virtual bool IsDialogButtonEnabled(DialogButton button) const {
return true;
}
// Returns whether the specified dialog button is visible.
virtual bool IsDialogButtonVisible(DialogButton button) const {
return true;
}
// For Dialog boxes, if there is a "Cancel" button, this is called when the
// user presses the "Cancel" button or the Close button on the window or
// in the system menu, or presses the Esc key. This function should return
// true if the window can be closed after it returns, or false if it must
// remain open.
virtual bool Cancel() { return true; }
// For Dialog boxes, this is called when the user presses the "OK" button,
// or the Enter key. Can also be called on Esc key or close button presses if
// there is no "Cancel" button. This function should return true if the window
// can be closed after the window can be closed after it returns, or false if
// it must remain open. If |window_closing| is true, it means that this
// handler is being called because the window is being closed (e.g. by
// Window::Close) and there is no Cancel handler, so Accept is being called
// instead.
virtual bool Accept(bool window_closing) { return Accept(); }
virtual bool Accept() { return true; }
// Overridden from WindowDelegate:
virtual View* GetInitiallyFocusedView() const {
// Try to focus the OK then the Cancel button if present.
DialogClientView* dcv = GetDialogClientView();
if (GetDialogButtons() & DIALOGBUTTON_OK)
return dcv->ok_button();
if (GetDialogButtons() & DIALOGBUTTON_CANCEL)
return dcv->cancel_button();
return NULL;
}
// Overridden from WindowDelegate:
virtual ClientView* CreateClientView(Window* window) {
return new DialogClientView(window, GetContentsView());
}
// A helper for accessing the DialogClientView object contained by this
// delegate's Window.
DialogClientView* GetDialogClientView() const {
ClientView* client_view = window()->client_view();
DialogClientView* dialog_client_view = client_view->AsDialogClientView();
DCHECK(dialog_client_view);
return dialog_client_view;
}
};
} // namespace ChromeViews
#endif // #ifndef CHROME_VIEWS_DIALOG_DELEGATE_H__
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