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// Copyright 2013 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef UI_SHELL_DIALOGS_PRINT_SETTINGS_DIALOG_WIN_H_
#define UI_SHELL_DIALOGS_PRINT_SETTINGS_DIALOG_WIN_H_
#include <ocidl.h>
#include <commdlg.h>
#include "base/memory/ref_counted.h"
#include "base/memory/scoped_ptr.h"
#include "base/message_loop/message_loop.h"
#include "base/message_loop/message_loop_proxy.h"
#include "ui/shell_dialogs/base_shell_dialog_win.h"
#include "ui/shell_dialogs/shell_dialogs_export.h"
namespace ui {
// A thin wrapper around the native window print dialog that uses
// BaseShellDialog to have the dialog run on a background thread.
class SHELL_DIALOGS_EXPORT PrintSettingsDialogWin
: public base::RefCountedThreadSafe<PrintSettingsDialogWin>,
public BaseShellDialogImpl {
public:
class SHELL_DIALOGS_EXPORT Observer {
public:
virtual void PrintSettingsConfirmed(PRINTDLGEX* dialog_options) = 0;
virtual void PrintSettingsCancelled(PRINTDLGEX* dialog_options) = 0;
};
typedef HRESULT(__stdcall* PrintDialogFunc)(PRINTDLGEX*);
explicit PrintSettingsDialogWin(Observer* observer);
virtual ~PrintSettingsDialogWin();
// Called to open the system print dialog on a background thread.
// |print_dialog_func| should generally be ::PrintDlgEx, however alternate
// functions are used for testing. |owning_window| is the parent HWND, and
// |dialog_options| is passed to |print_dialog_func|.
void GetPrintSettings(
PrintDialogFunc print_dialog_func,
HWND owning_window,
PRINTDLGEX* dialog_options);
private:
// A struct for holding all the state necessary for displaying the print
// settings dialog.
struct ExecutePrintSettingsParams {
ExecutePrintSettingsParams(RunState run_state,
HWND owner,
PrintDialogFunc print_dialog_func,
PRINTDLGEX* dialog_options)
: run_state(run_state),
owner(owner),
print_dialog_func(print_dialog_func),
dialog_options(dialog_options),
ui_proxy(base::MessageLoopForUI::current()->message_loop_proxy()) {}
RunState run_state;
HWND owner;
PrintDialogFunc print_dialog_func;
PRINTDLGEX* dialog_options;
scoped_refptr<base::MessageLoopProxy> ui_proxy;
};
// Runs the print dialog. Should be run on the the BaseShellDialogImpl thread.
// Posts back to PrintSettingsCompleted on the UI thread on completion.
void ExecutePrintSettings(const ExecutePrintSettingsParams& params);
// Handler for the result of the print settings dialog. Should be run on the
// UI thread, and notifies the observer of the result of the dialog.
void PrintSettingsCompleted(HRESULT hresult,
const ExecutePrintSettingsParams& params);
// Observer that's notified when the dialog is confirmed or cancelled.
Observer* observer_;
DISALLOW_COPY_AND_ASSIGN(PrintSettingsDialogWin);
};
} // namespace ui
#endif // UI_SHELL_DIALOGS_PRINT_SETTINGS_DIALOG_WIN_H_
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