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WinRT: allowed setting the device rotation preference via SDL_HINT_ORIENTATIONS

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This commit is contained in:
David Ludwig
2013-02-22 23:23:53 -05:00
parent 4c4c4093c2
commit 47a35d888b
1 changed files with 63 additions and 1 deletions
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64
src/video/windowsrt/SDL_WinRTApp.cpp
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@@ -14,10 +14,15 @@ extern "C" {
#include "SDL_log.h"
#include "SDL_render.h"
#include "../../render/SDL_sysrender.h"
#include "SDL_hints.h"
#include "../../SDL_hints_c.h"
}
#include <string>
#include <unordered_map>
#include <sstream>
using namespace Windows::Graphics::Display;
// TODO, WinRT: Remove reference(s) to BasicTimer.h
//#include "BasicTimer.h"
@@ -28,6 +33,55 @@ extern "C" {
typedef int (*SDL_WinRT_MainFunction)(int, char **);
static SDL_WinRT_MainFunction SDL_WinRT_main = nullptr;
static void WINRT_SetDisplayOrientationsPreference(const char *name, const char *oldValue, const char *newValue)
{
SDL_assert(SDL_strcmp(name, SDL_HINT_ORIENTATIONS) == 0);
// Start with no orientation flags, then add each in as they're parsed
// from newValue.
unsigned int orientationFlags = 0;
std::istringstream tokenizer(newValue);
while (!tokenizer.eof()) {
std::string orientationName;
std::getline(tokenizer, orientationName, ' ');
if (orientationName == "LandscapeLeft") {
orientationFlags |= (unsigned int) DisplayOrientations::LandscapeFlipped;
} else if (orientationName == "LandscapeRight") {
orientationFlags |= (unsigned int) DisplayOrientations::Landscape;
} else if (orientationName == "Portrait") {
orientationFlags |= (unsigned int) DisplayOrientations::Portrait;
} else if (orientationName == "PortraitUpsideDown") {
orientationFlags |= (unsigned int) DisplayOrientations::PortraitFlipped;
}
}
// If no valid orientation flags were specified, use a reasonable set of defaults:
if (!orientationFlags) {
// TODO, WinRT: consider seeing if an app's default orientation flags can be found out via some API call(s).
orientationFlags = (unsigned int) ( \
DisplayOrientations::Landscape |
DisplayOrientations::LandscapeFlipped |
DisplayOrientations::Portrait |
DisplayOrientations::PortraitFlipped);
}
// Set the orientation/rotation preferences. Please note that this does
// not constitute a 100%-certain lock of a given set of possible
// orientations. According to Microsoft's documentation on Windows RT [1]
// when a device is not capable of being rotated, Windows may ignore
// the orientation preferences, and stick to what the device is capable of
// displaying.
//
// [1] Documentation on the 'InitialRotationPreference' setting for a
// Windows app's manifest file describes how some orientation/rotation
// preferences may be ignored. See
// http://msdn.microsoft.com/en-us/library/windows/apps/hh700343.aspx
// for details. Microsoft's "Display orientation sample" also gives an
// outline of how Windows treats device rotation
// (http://code.msdn.microsoft.com/Display-Orientation-Sample-19a58e93).
DisplayProperties::AutoRotationPreferences = (DisplayOrientations) orientationFlags;
}
// HACK, DLudwig: record a reference to the global, Windows RT 'app'/view.
// SDL/WinRT will use this throughout its code.
//
@@ -68,6 +122,14 @@ void SDL_WinRTApp::Initialize(CoreApplicationView^ applicationView)
CoreApplication::Resuming +=
ref new EventHandler<Platform::Object^>(this, &SDL_WinRTApp::OnResuming);
// Register the hint, SDL_HINT_ORIENTATIONS, with SDL. This needs to be
// done before the hint's callback is registered (as of Feb 22, 2013),
// otherwise the hint callback won't get registered.
//
// WinRT, TODO: see if an app's default orientation can be found out via WinRT API(s), then set the initial value of SDL_HINT_ORIENTATIONS accordingly.
SDL_SetHint(SDL_HINT_ORIENTATIONS, "LandscapeLeft LandscapeRight Portrait PortraitUpsideDown");
SDL_RegisterHintChangedCb(SDL_HINT_ORIENTATIONS, WINRT_SetDisplayOrientationsPreference);
}
void SDL_WinRTApp::SetWindow(CoreWindow^ window)
@@ -661,7 +723,7 @@ TranslateKeycode(int keycode)
void SDL_WinRTApp::OnKeyDown(Windows::UI::Core::CoreWindow^ sender, Windows::UI::Core::KeyEventArgs^ args)
{
#if 0
#if 1
SDL_Log("key down, handled=%s, ext?=%s, released?=%s, menu key down?=%s, repeat count=%d, scan code=%d, was down?=%s, vkey=%d\n",
(args->Handled ? "1" : "0"),
(args->KeyStatus.IsExtendedKey ? "1" : "0"),