SDL  2.0
SDL_winrtmessagebox.cpp
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1 /*
2  Simple DirectMedia Layer
3  Copyright (C) 1997-2018 Sam Lantinga <slouken@libsdl.org>
4 
5  This software is provided 'as-is', without any express or implied
6  warranty. In no event will the authors be held liable for any damages
7  arising from the use of this software.
8 
9  Permission is granted to anyone to use this software for any purpose,
10  including commercial applications, and to alter it and redistribute it
11  freely, subject to the following restrictions:
12 
13  1. The origin of this software must not be misrepresented; you must not
14  claim that you wrote the original software. If you use this software
15  in a product, an acknowledgment in the product documentation would be
16  appreciated but is not required.
17  2. Altered source versions must be plainly marked as such, and must not be
18  misrepresented as being the original software.
19  3. This notice may not be removed or altered from any source distribution.
20 */
21 #include "../../SDL_internal.h"
22 
23 #if SDL_VIDEO_DRIVER_WINRT
24 
25 extern "C" {
26 #include "SDL_messagebox.h"
27 #include "../../core/windows/SDL_windows.h"
28 }
29 
30 #include "SDL_winrtevents_c.h"
31 
32 #include <windows.ui.popups.h>
33 using namespace Platform;
34 using namespace Windows::Foundation;
35 using namespace Windows::UI::Popups;
36 
37 static String ^
38 WINRT_UTF8ToPlatformString(const char * str)
39 {
40  wchar_t * wstr = WIN_UTF8ToString(str);
41  String ^ rtstr = ref new String(wstr);
42  SDL_free(wstr);
43  return rtstr;
44 }
45 
46 extern "C" int
47 WINRT_ShowMessageBox(const SDL_MessageBoxData *messageboxdata, int *buttonid)
48 {
49 #if (WINAPI_FAMILY == WINAPI_FAMILY_PHONE_APP) && (NTDDI_VERSION == NTDDI_WIN8)
50  /* Sadly, Windows Phone 8 doesn't include the MessageDialog class that
51  * Windows 8.x/RT does, even though MSDN's reference documentation for
52  * Windows Phone 8 mentions it.
53  *
54  * The .NET runtime on Windows Phone 8 does, however, include a
55  * MessageBox class. Perhaps this could be called, somehow?
56  */
57  return SDL_SetError("SDL_messagebox support is not available for Windows Phone 8.0");
58 #else
60 
61 #if WINAPI_FAMILY == WINAPI_FAMILY_PHONE_APP
62  const int maxbuttons = 2;
63  const char * platform = "Windows Phone 8.1+";
64 #else
65  const int maxbuttons = 3;
66  const char * platform = "Windows 8.x";
67 #endif
68 
69  if (messageboxdata->numbuttons > maxbuttons) {
70  return SDL_SetError("WinRT's MessageDialog only supports %d buttons, at most, on %s. %d were requested.",
71  maxbuttons, platform, messageboxdata->numbuttons);
72  }
73 
74  /* Build a MessageDialog object and its buttons */
75  MessageDialog ^ dialog = ref new MessageDialog(WINRT_UTF8ToPlatformString(messageboxdata->message));
76  dialog->Title = WINRT_UTF8ToPlatformString(messageboxdata->title);
77  for (int i = 0; i < messageboxdata->numbuttons; ++i) {
78  UICommand ^ button = ref new UICommand(WINRT_UTF8ToPlatformString(messageboxdata->buttons[i].text));
79  button->Id = safe_cast<IntPtr>(i);
80  dialog->Commands->Append(button);
81  if (messageboxdata->buttons[i].flags & SDL_MESSAGEBOX_BUTTON_ESCAPEKEY_DEFAULT) {
82  dialog->CancelCommandIndex = i;
83  }
84  if (messageboxdata->buttons[i].flags & SDL_MESSAGEBOX_BUTTON_RETURNKEY_DEFAULT) {
85  dialog->DefaultCommandIndex = i;
86  }
87  }
88 
89  /* Display the MessageDialog, then wait for it to be closed */
90  /* TODO, WinRT: Find a way to redraw MessageDialog instances if a GPU device-reset occurs during the following event-loop */
91  auto operation = dialog->ShowAsync();
92  while (operation->Status == Windows::Foundation::AsyncStatus::Started) {
93  WINRT_PumpEvents(_this);
94  }
95 
96  /* Retrieve results from the MessageDialog and process them accordingly */
97  if (operation->Status != Windows::Foundation::AsyncStatus::Completed) {
98  return SDL_SetError("An unknown error occurred in displaying the WinRT MessageDialog");
99  }
100  if (buttonid) {
101  IntPtr results = safe_cast<IntPtr>(operation->GetResults()->Id);
102  int clicked_index = results.ToInt32();
103  *buttonid = messageboxdata->buttons[clicked_index].buttonid;
104  }
105  return 0;
106 #endif /* if WINAPI_FAMILY == WINAPI_FAMILY_PHONE_APP / else */
107 }
108 
109 #endif /* SDL_VIDEO_DRIVER_WINRT */
110 
111 /* vi: set ts=4 sw=4 expandtab: */
112 
const char * message
#define WIN_UTF8ToString(S)
Definition: SDL_windows.h:47
SDL_Texture * button
const char * title
GLenum GLint ref
static SDL_VideoDevice * _this
Definition: SDL_video.c:121
#define SDL_free
void WINRT_PumpEvents(_THIS)
const SDL_MessageBoxButtonData * buttons
MessageBox structure containing title, text, window, etc.
return Display return Display Bool Bool int int int return Display XEvent Bool(*) XPointer return Display return Display Drawable _Xconst char unsigned int unsigned int return Display Pixmap Pixmap XColor XColor unsigned int unsigned int return Display _Xconst char char int char return Display Visual unsigned int int int char unsigned int unsigned int in i)
Definition: SDL_x11sym.h:50
#define SDL_SetError
SDL_VideoDevice * SDL_GetVideoDevice(void)
Definition: SDL_video.c:586