/// <summary>
/// Constructs a new ImGuiController.
/// </summary>
public ImGuiBindings(GraphicsDevice gd, OutputDescription outputDescription, int width, int height)
{
_gd = gd;
_windowWidth = width;
_windowHeight = height;
IntPtr context = ImGui.CreateContext();
ImGui.SetCurrentContext(context);
var fonts = ImGui.GetIO().Fonts;
ImGui.GetIO().Fonts.AddFontDefault();
ImGui.GetIO().ConfigFlags |= ImGuiConfigFlags.NavEnableKeyboard | ImGuiConfigFlags.NavEnableGamepad;
ImGui.GetIO().BackendFlags |= ImGuiBackendFlags.HasGamepad;
_setText = new SetClipboardTextDelegate(SetClipboardText);
_getText = new GetClipboardTextDelegate(GetClipboardText);
var io = ImGui.GetIO();
io.SetClipboardTextFn = Marshal.GetFunctionPointerForDelegate(_setText);
io.GetClipboardTextFn = Marshal.GetFunctionPointerForDelegate(_getText);
io.ClipboardUserData = IntPtr.Zero;
CreateDeviceResources(gd, outputDescription);
SetKeyMappings();
SetPerFrameImGuiData(1f / 60f);
ImGui.NewFrame();
_frameBegun = true;
}
private bool disposedValue = false; // To detect redundant calls
protected virtual void Dispose(bool disposing)
{
if (!disposedValue)
{
if (disposing)
{
// TODO: dispose managed state (managed objects).
_setText = null;
_getText = null;
}
// TODO: free unmanaged resources (unmanaged objects) and override a finalizer below.
// TODO: set large fields to null.
_sdlWindow = IntPtr.Zero;
ImGui.GetIO().SetClipboardTextFn = IntPtr.Zero;
ImGui.GetIO().GetClipboardTextFn = IntPtr.Zero;
// Destroy SDL mouse cursors
foreach (var cur in _mouseCursors)
{
SDL_FreeCursor(cur);
}
if (_platformNamePtr != IntPtr.Zero)
{
unsafe
{
ImGui.GetIO().NativePtr->BackendPlatformName = null;
}
Marshal.FreeHGlobal(_platformNamePtr);
_platformNamePtr = IntPtr.Zero;
}
if (_iniPathPtr != IntPtr.Zero)
{
unsafe
{
ImGui.GetIO().NativePtr->IniFilename = null;
}
Marshal.FreeHGlobal(_iniPathPtr);
_iniPathPtr = IntPtr.Zero;
}
disposedValue = true;
}
}
public static bool Init(IntPtr sdlWindow)
{
_sdlWindow = sdlWindow;
// Setup back-end capabilities flags
var io = ImGui.GetIO();
// We can honor GetMouseCursor() values (optional)
// We can honor io.WantSetMousePos requests (optional, rarely used)
io.BackendFlags = io.BackendFlags | (ImGuiBackendFlags.HasMouseCursors | ImGuiBackendFlags.HasSetMousePos);
// Keyboard mapping. ImGui will use those indices to peek into the io.KeysDown[] array.
io.KeyMap[(int)ImGuiKey.Tab] = (int)SDL_Scancode.SDL_SCANCODE_TAB;
io.KeyMap[(int)ImGuiKey.LeftArrow] = (int)SDL_Scancode.SDL_SCANCODE_LEFT;
io.KeyMap[(int)ImGuiKey.RightArrow] = (int)SDL_Scancode.SDL_SCANCODE_RIGHT;
io.KeyMap[(int)ImGuiKey.UpArrow] = (int)SDL_Scancode.SDL_SCANCODE_UP;
io.KeyMap[(int)ImGuiKey.DownArrow] = (int)SDL_Scancode.SDL_SCANCODE_DOWN;
io.KeyMap[(int)ImGuiKey.PageUp] = (int)SDL_Scancode.SDL_SCANCODE_PAGEUP;
io.KeyMap[(int)ImGuiKey.PageDown] = (int)SDL_Scancode.SDL_SCANCODE_PAGEDOWN;
io.KeyMap[(int)ImGuiKey.Home] = (int)SDL_Scancode.SDL_SCANCODE_HOME;
io.KeyMap[(int)ImGuiKey.End] = (int)SDL_Scancode.SDL_SCANCODE_END;
io.KeyMap[(int)ImGuiKey.Insert] = (int)SDL_Scancode.SDL_SCANCODE_INSERT;
io.KeyMap[(int)ImGuiKey.Delete] = (int)SDL_Scancode.SDL_SCANCODE_DELETE;
io.KeyMap[(int)ImGuiKey.Backspace] = (int)SDL_Scancode.SDL_SCANCODE_BACKSPACE;
io.KeyMap[(int)ImGuiKey.Space] = (int)SDL_Scancode.SDL_SCANCODE_SPACE;
io.KeyMap[(int)ImGuiKey.Enter] = (int)SDL_Scancode.SDL_SCANCODE_RETURN;
io.KeyMap[(int)ImGuiKey.Escape] = (int)SDL_Scancode.SDL_SCANCODE_ESCAPE;
io.KeyMap[(int)ImGuiKey.KeyPadEnter] = (int)SDL_Scancode.SDL_SCANCODE_RETURN2;
io.KeyMap[(int)ImGuiKey.A] = (int)SDL_Scancode.SDL_SCANCODE_A;
io.KeyMap[(int)ImGuiKey.C] = (int)SDL_Scancode.SDL_SCANCODE_C;
io.KeyMap[(int)ImGuiKey.V] = (int)SDL_Scancode.SDL_SCANCODE_V;
io.KeyMap[(int)ImGuiKey.X] = (int)SDL_Scancode.SDL_SCANCODE_X;
io.KeyMap[(int)ImGuiKey.Y] = (int)SDL_Scancode.SDL_SCANCODE_Y;
io.KeyMap[(int)ImGuiKey.Z] = (int)SDL_Scancode.SDL_SCANCODE_Z;
_setText = new SetClipboardTextDelegate(SetClipboardText);
_getText = new GetClipboardTextDelegate(GetClipboardText);
io.SetClipboardTextFn = Marshal.GetFunctionPointerForDelegate(_setText);
io.GetClipboardTextFn = Marshal.GetFunctionPointerForDelegate(_getText);
io.ClipboardUserData = IntPtr.Zero;
_mouseCursors[(int)ImGuiMouseCursor.Arrow] = SDL_CreateSystemCursor(SDL_SystemCursor.SDL_SYSTEM_CURSOR_ARROW);
_mouseCursors[(int)ImGuiMouseCursor.TextInput] = SDL_CreateSystemCursor(SDL_SystemCursor.SDL_SYSTEM_CURSOR_IBEAM);
_mouseCursors[(int)ImGuiMouseCursor.ResizeAll] = SDL_CreateSystemCursor(SDL_SystemCursor.SDL_SYSTEM_CURSOR_SIZEALL);
_mouseCursors[(int)ImGuiMouseCursor.ResizeNS] = SDL_CreateSystemCursor(SDL_SystemCursor.SDL_SYSTEM_CURSOR_SIZENS);
_mouseCursors[(int)ImGuiMouseCursor.ResizeEW] = SDL_CreateSystemCursor(SDL_SystemCursor.SDL_SYSTEM_CURSOR_SIZEWE);
_mouseCursors[(int)ImGuiMouseCursor.ResizeNESW] = SDL_CreateSystemCursor(SDL_SystemCursor.SDL_SYSTEM_CURSOR_SIZENESW);
_mouseCursors[(int)ImGuiMouseCursor.ResizeNWSE] = SDL_CreateSystemCursor(SDL_SystemCursor.SDL_SYSTEM_CURSOR_SIZENWSE);
_mouseCursors[(int)ImGuiMouseCursor.Hand] = SDL_CreateSystemCursor(SDL_SystemCursor.SDL_SYSTEM_CURSOR_HAND);
// This apparently does not exist in ImGui.NET
// _mouseCursors[(int)ImGuiMouseCursor.NotAllowed] = SDL_CreateSystemCursor(SDL_SystemCursor.SDL_SYSTEM_CURSOR_NO);
var sysWmInfo = new SDL_SysWMinfo();
SDL_GetVersion(out sysWmInfo.version);
SDL_GetWindowWMInfo(sdlWindow, ref sysWmInfo);
io.ImeWindowHandle = sysWmInfo.info.win.window;
return(true);
}
public static void Init(RenderWindow window, Vector2f displaySize, bool loadDefaultFont = true)
{
ImGui.CreateContext();
var io = ImGui.GetIO();
io.BackendFlags |= ImGuiBackendFlags.HasGamepad;
io.BackendFlags |= ImGuiBackendFlags.HasMouseCursors;
io.BackendFlags |= ImGuiBackendFlags.HasSetMousePos;
//io.BackendPlatformName = "imgui_impl_sfml_net";
unsafe
{
io.KeyMap[(int)ImGuiKey.Tab] = (int)Keyboard.Key.Tab;
io.KeyMap[(int)ImGuiKey.LeftArrow] = (int)Keyboard.Key.Left;
io.KeyMap[(int)ImGuiKey.RightArrow] = (int)Keyboard.Key.Right;
io.KeyMap[(int)ImGuiKey.UpArrow] = (int)Keyboard.Key.Up;
io.KeyMap[(int)ImGuiKey.DownArrow] = (int)Keyboard.Key.Down;
io.KeyMap[(int)ImGuiKey.PageUp] = (int)Keyboard.Key.PageUp;
io.KeyMap[(int)ImGuiKey.PageDown] = (int)Keyboard.Key.PageDown;
io.KeyMap[(int)ImGuiKey.Home] = (int)Keyboard.Key.Home;
io.KeyMap[(int)ImGuiKey.End] = (int)Keyboard.Key.End;
io.KeyMap[(int)ImGuiKey.Insert] = (int)Keyboard.Key.Insert;
io.KeyMap[(int)ImGuiKey.Delete] = (int)Keyboard.Key.Delete;
io.KeyMap[(int)ImGuiKey.Backspace] = (int)Keyboard.Key.BackSpace;
io.KeyMap[(int)ImGuiKey.Space] = (int)Keyboard.Key.Space;
io.KeyMap[(int)ImGuiKey.Enter] = (int)Keyboard.Key.Return;
io.KeyMap[(int)ImGuiKey.Escape] = (int)Keyboard.Key.Escape;
io.KeyMap[(int)ImGuiKey.A] = (int)Keyboard.Key.A;
io.KeyMap[(int)ImGuiKey.C] = (int)Keyboard.Key.C;
io.KeyMap[(int)ImGuiKey.V] = (int)Keyboard.Key.V;
io.KeyMap[(int)ImGuiKey.X] = (int)Keyboard.Key.X;
io.KeyMap[(int)ImGuiKey.Y] = (int)Keyboard.Key.Y;
io.KeyMap[(int)ImGuiKey.Z] = (int)Keyboard.Key.Z;
}
s_joystickId = GetConnectedJoystickId();
for (uint i = 0; i < (int)ImGuiNavInput.COUNT; ++i)
{
s_joystickMapping[i] = NULL_JOYSTICK_BUTTON;
}
InitDefaultJoystickMapping();
io.DisplaySize = new System.Numerics.Vector2(displaySize.X, displaySize.Y);
unsafe
{
io.SetClipboardTextFn = Marshal.GetFunctionPointerForDelegate(setClipboardTextDelegate = new SetClipboardTextDelegate(SetClipboardText));
io.GetClipboardTextFn = Marshal.GetFunctionPointerForDelegate(getClipboardTextDelegate = new GetClipboardTextDelegate(GetClipboardText));
}
for (int i = 0; i < (int)ImGuiMouseCursor.COUNT; ++i)
{
s_mouseCursorLoaded[i] = false;
}
LoadMouseCursor(ImGuiMouseCursor.Arrow, ImGuiMouseCursor.Arrow);
LoadMouseCursor(ImGuiMouseCursor.TextInput, ImGuiMouseCursor.TextInput);
LoadMouseCursor(ImGuiMouseCursor.ResizeAll, ImGuiMouseCursor.ResizeAll);
LoadMouseCursor(ImGuiMouseCursor.ResizeNS, ImGuiMouseCursor.ResizeNS);
LoadMouseCursor(ImGuiMouseCursor.ResizeEW, ImGuiMouseCursor.ResizeEW);
LoadMouseCursor(ImGuiMouseCursor.ResizeNESW, ImGuiMouseCursor.ResizeNESW);
LoadMouseCursor(ImGuiMouseCursor.ResizeNWSE, ImGuiMouseCursor.ResizeNWSE);
LoadMouseCursor(ImGuiMouseCursor.Hand, ImGuiMouseCursor.Hand);
if (s_fontTexture != null)
{
s_fontTexture = null;
}
s_fontTexture = new Texture(1, 1);
if (loadDefaultFont)
{
UpdateFontTexture();
}
s_windowHasFocus = window.HasFocus();
// TODO: Move these to their own functions, and deregister in Shutdown
window.MouseMoved += (s, e) =>
{
if (!window.HasFocus())
{
return;
}
s_mouseMoved = true;
};
window.MouseButtonReleased += (s, e) =>
{
if (!window.HasFocus())
{
return;
}
if ((int)e.Button >= 0 && (int)e.Button < 3)
{
s_mousePressed[(int)e.Button] = true;
}
};
window.TouchBegan += (s, e) =>
{
if (!window.HasFocus())
{
return;
}
s_mouseMoved = false;
if (e.Finger >= 0 && e.Finger < 3)
{
s_touchDown[e.Finger] = true;
}
};
window.TouchEnded += (s, e) =>
{
if (!window.HasFocus())
{
return;
}
s_mouseMoved = false;
};
window.MouseWheelScrolled += (s, e) =>
{
if (!window.HasFocus())
{
return;
}
if (e.Wheel == Mouse.Wheel.VerticalWheel || e.Wheel == Mouse.Wheel.HorizontalWheel && io.KeyShift)
{
io.MouseWheel += e.Delta;
}
else if (e.Wheel == Mouse.Wheel.HorizontalWheel)
{
io.MouseWheelH += e.Delta;
}
};
window.KeyPressed += (s, e) =>
{
if (!window.HasFocus())
{
return;
}
io.KeysDown[(int)e.Code] = true;
};
window.KeyPressed += (s, e) =>
{
if (!window.HasFocus())
{
return;
}
io.KeysDown[(int)e.Code] = false;
};
window.TextEntered += (s, e) =>
{
if (!window.HasFocus())
{
return;
}
if (e.Unicode[0] < ' ' || e.Unicode[0] == 127)
{
return;
}
io.AddInputCharacter((uint)e.Unicode[0]);
};
window.JoystickConnected += (s, e) =>
{
if (!window.HasFocus())
{
return;
}
if (s_joystickId == NULL_JOYSTICK_ID)
{
s_joystickId = e.JoystickId;
}
};
window.JoystickDisconnected += (s, e) =>
{
if (!window.HasFocus())
{
return;
}
if (s_joystickId == e.JoystickId)
{
s_joystickId = GetConnectedJoystickId();
}
};
window.LostFocus += (s, e) => s_windowHasFocus = false;
window.GainedFocus += (s, e) => s_windowHasFocus = true;
}
public ImGui_Impl_SDL(IntPtr sdlWindow)
{
_sdlWindow = sdlWindow;
// Setup back-end capabilities flags
var io = ImGui.GetIO();
// We can honor GetMouseCursor() values (optional)
// We can honor io.WantSetMousePos requests (optional, rarely used)
io.BackendFlags = io.BackendFlags | ImGuiBackendFlags.HasMouseCursors | ImGuiBackendFlags.HasSetMousePos;
// BackendPlatformName is readonly (and null) in ImGui.NET for some reason, but we can hack it via its internal pointer
_platformNamePtr = Marshal.StringToHGlobalAnsi("imgui_impl_sdl_c#");
unsafe
{
io.NativePtr->BackendPlatformName = (byte *)_platformNamePtr.ToPointer();
}
// Keyboard mapping. ImGui will use those indices to peek into the io.KeysDown[] array.
io.KeyMap[(int)ImGuiKey.Tab] = (int)SDL_Scancode.SDL_SCANCODE_TAB;
io.KeyMap[(int)ImGuiKey.LeftArrow] = (int)SDL_Scancode.SDL_SCANCODE_LEFT;
io.KeyMap[(int)ImGuiKey.RightArrow] = (int)SDL_Scancode.SDL_SCANCODE_RIGHT;
io.KeyMap[(int)ImGuiKey.UpArrow] = (int)SDL_Scancode.SDL_SCANCODE_UP;
io.KeyMap[(int)ImGuiKey.DownArrow] = (int)SDL_Scancode.SDL_SCANCODE_DOWN;
io.KeyMap[(int)ImGuiKey.PageUp] = (int)SDL_Scancode.SDL_SCANCODE_PAGEUP;
io.KeyMap[(int)ImGuiKey.PageDown] = (int)SDL_Scancode.SDL_SCANCODE_PAGEDOWN;
io.KeyMap[(int)ImGuiKey.Home] = (int)SDL_Scancode.SDL_SCANCODE_HOME;
io.KeyMap[(int)ImGuiKey.End] = (int)SDL_Scancode.SDL_SCANCODE_END;
io.KeyMap[(int)ImGuiKey.Insert] = (int)SDL_Scancode.SDL_SCANCODE_INSERT;
io.KeyMap[(int)ImGuiKey.Delete] = (int)SDL_Scancode.SDL_SCANCODE_DELETE;
io.KeyMap[(int)ImGuiKey.Backspace] = (int)SDL_Scancode.SDL_SCANCODE_BACKSPACE;
io.KeyMap[(int)ImGuiKey.Space] = (int)SDL_Scancode.SDL_SCANCODE_SPACE;
io.KeyMap[(int)ImGuiKey.Enter] = (int)SDL_Scancode.SDL_SCANCODE_RETURN;
io.KeyMap[(int)ImGuiKey.Escape] = (int)SDL_Scancode.SDL_SCANCODE_ESCAPE;
io.KeyMap[(int)ImGuiKey.KeyPadEnter] = (int)SDL_Scancode.SDL_SCANCODE_RETURN2;
io.KeyMap[(int)ImGuiKey.A] = (int)SDL_Scancode.SDL_SCANCODE_A;
io.KeyMap[(int)ImGuiKey.C] = (int)SDL_Scancode.SDL_SCANCODE_C;
io.KeyMap[(int)ImGuiKey.V] = (int)SDL_Scancode.SDL_SCANCODE_V;
io.KeyMap[(int)ImGuiKey.X] = (int)SDL_Scancode.SDL_SCANCODE_X;
io.KeyMap[(int)ImGuiKey.Y] = (int)SDL_Scancode.SDL_SCANCODE_Y;
io.KeyMap[(int)ImGuiKey.Z] = (int)SDL_Scancode.SDL_SCANCODE_Z;
_setText = new SetClipboardTextDelegate(SetClipboardText);
_getText = new GetClipboardTextDelegate(GetClipboardText);
io.SetClipboardTextFn = Marshal.GetFunctionPointerForDelegate(_setText);
io.GetClipboardTextFn = Marshal.GetFunctionPointerForDelegate(_getText);
io.ClipboardUserData = IntPtr.Zero;
_mouseCursors[(int)ImGuiMouseCursor.Arrow] = SDL_CreateSystemCursor(SDL_SystemCursor.SDL_SYSTEM_CURSOR_ARROW);
_mouseCursors[(int)ImGuiMouseCursor.TextInput] = SDL_CreateSystemCursor(SDL_SystemCursor.SDL_SYSTEM_CURSOR_IBEAM);
_mouseCursors[(int)ImGuiMouseCursor.ResizeAll] = SDL_CreateSystemCursor(SDL_SystemCursor.SDL_SYSTEM_CURSOR_SIZEALL);
_mouseCursors[(int)ImGuiMouseCursor.ResizeNS] = SDL_CreateSystemCursor(SDL_SystemCursor.SDL_SYSTEM_CURSOR_SIZENS);
_mouseCursors[(int)ImGuiMouseCursor.ResizeEW] = SDL_CreateSystemCursor(SDL_SystemCursor.SDL_SYSTEM_CURSOR_SIZEWE);
_mouseCursors[(int)ImGuiMouseCursor.ResizeNESW] = SDL_CreateSystemCursor(SDL_SystemCursor.SDL_SYSTEM_CURSOR_SIZENESW);
_mouseCursors[(int)ImGuiMouseCursor.ResizeNWSE] = SDL_CreateSystemCursor(SDL_SystemCursor.SDL_SYSTEM_CURSOR_SIZENWSE);
_mouseCursors[(int)ImGuiMouseCursor.Hand] = SDL_CreateSystemCursor(SDL_SystemCursor.SDL_SYSTEM_CURSOR_HAND);
_mouseCursors[(int)ImGuiMouseCursor.NotAllowed] = SDL_CreateSystemCursor(SDL_SystemCursor.SDL_SYSTEM_CURSOR_NO);
var sysWmInfo = new SDL_SysWMinfo();
SDL_GetVersion(out sysWmInfo.version);
SDL_GetWindowWMInfo(_sdlWindow, ref sysWmInfo);
// TODO: This does not exist in newer ImGui versions
//io.ImeWindowHandle = sysWmInfo.info.win.window;
}
