--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Applications/Samples/Sdl/SdlHelpers.h	Tue Aug 11 13:24:38 2020 +0200
@@ -0,0 +1,142 @@
+/**
+ * Stone of Orthanc
+ * Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics
+ * Department, University Hospital of Liege, Belgium
+ * Copyright (C) 2017-2020 Osimis S.A., Belgium
+ *
+ * This program is free software: you can redistribute it and/or
+ * modify it under the terms of the GNU Affero General Public License
+ * as published by the Free Software Foundation, either version 3 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Affero General Public License for more details.
+ * 
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ **/
+
+
+#pragma once
+
+#if ORTHANC_ENABLE_SDL != 1
+# error This file cannot be used if ORTHANC_ENABLE_SDL != 1
+#endif
+
+#include "../../Sources/Viewport/SdlViewport.h"
+
+#include <boost/shared_ptr.hpp>
+
+#include <SDL.h>
+
+#include <map>
+#include <string>
+
+namespace OrthancStoneHelpers
+{
+
+  inline OrthancStone::KeyboardModifiers GetKeyboardModifiers(const uint8_t* keyboardState,
+                                                              const int scancodeCount)
+  {
+    using namespace OrthancStone;
+    int result = KeyboardModifiers_None;
+
+    if (keyboardState != NULL)
+    {
+      if (SDL_SCANCODE_LSHIFT < scancodeCount &&
+          keyboardState[SDL_SCANCODE_LSHIFT])
+      {
+        result |= KeyboardModifiers_Shift;
+      }
+
+      if (SDL_SCANCODE_RSHIFT < scancodeCount &&
+          keyboardState[SDL_SCANCODE_RSHIFT])
+      {
+        result |= KeyboardModifiers_Shift;
+      }
+
+      if (SDL_SCANCODE_LCTRL < scancodeCount &&
+          keyboardState[SDL_SCANCODE_LCTRL])
+      {
+        result |= KeyboardModifiers_Control;
+      }
+
+      if (SDL_SCANCODE_RCTRL < scancodeCount &&
+          keyboardState[SDL_SCANCODE_RCTRL])
+      {
+        result |= KeyboardModifiers_Control;
+      }
+
+      if (SDL_SCANCODE_LALT < scancodeCount &&
+          keyboardState[SDL_SCANCODE_LALT])
+      {
+        result |= KeyboardModifiers_Alt;
+      }
+
+      if (SDL_SCANCODE_RALT < scancodeCount &&
+          keyboardState[SDL_SCANCODE_RALT])
+      {
+        result |= KeyboardModifiers_Alt;
+      }
+    }
+
+    return static_cast<KeyboardModifiers>(result);
+  }
+
+
+  inline void GetPointerEvent(OrthancStone::PointerEvent& p,
+                              const OrthancStone::ICompositor& compositor,
+                              SDL_Event event,
+                              const uint8_t* keyboardState,
+                              const int scancodeCount)
+  {
+    using namespace OrthancStone;
+    KeyboardModifiers modifiers = GetKeyboardModifiers(keyboardState, scancodeCount);
+
+    switch (event.button.button)
+    {
+    case SDL_BUTTON_LEFT:
+      p.SetMouseButton(OrthancStone::MouseButton_Left);
+      break;
+
+    case SDL_BUTTON_RIGHT:
+      p.SetMouseButton(OrthancStone::MouseButton_Right);
+      break;
+
+    case SDL_BUTTON_MIDDLE:
+      p.SetMouseButton(OrthancStone::MouseButton_Middle);
+      break;
+
+    default:
+      p.SetMouseButton(OrthancStone::MouseButton_None);
+      break;
+    }
+
+    p.AddPosition(compositor.GetPixelCenterCoordinates(event.button.x, event.button.y));
+    p.SetAltModifier( (modifiers & KeyboardModifiers_Alt) != 0);
+    p.SetControlModifier( (modifiers & KeyboardModifiers_Control) != 0);
+    p.SetShiftModifier( (modifiers & KeyboardModifiers_Shift) != 0);
+  }
+
+  
+  inline boost::shared_ptr<OrthancStone::SdlViewport> GetSdlViewportFromWindowId(
+    const std::vector<boost::shared_ptr<OrthancStone::SdlViewport> >& viewports,
+    Uint32 windowID)
+  {
+    using namespace OrthancStone;
+    for (size_t i = 0; i < viewports.size(); ++i)
+    {
+      boost::shared_ptr<IViewport> viewport = viewports[i];
+      boost::shared_ptr<SdlViewport> sdlViewport = boost::dynamic_pointer_cast<SdlViewport>(viewport);
+      Uint32 curWindowID = sdlViewport->GetSdlWindowId();
+      if (windowID == curWindowID)
+        return sdlViewport;
+    }
+    
+    return boost::shared_ptr<OrthancStone::SdlViewport>();
+  }
+}
+
+