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Handle controller inputs in ImGui

This commit is contained in:
Connor McLaughlin 2019-10-27 01:05:11 +10:00
parent f538123210
commit f314a26eee
1 changed files with 73 additions and 0 deletions
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73
dep/imgui/src/imgui_impl_sdl.cpp
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@ -69,6 +69,7 @@ static Uint64 g_Time = 0;
static bool g_MousePressed[3] = { false, false, false };
static SDL_Cursor* g_MouseCursors[ImGuiMouseCursor_COUNT] = { 0 };
static char* g_ClipboardTextData = NULL;
static float g_ControllerNavInputs[ImGuiNavInput_COUNT] = {};
// Forward Declarations
static void ImGui_ImplSDL2_InitPlatformInterface(SDL_Window* window, void* sdl_gl_context);
@ -129,6 +130,75 @@ bool ImGui_ImplSDL2_ProcessEvent(const SDL_Event* event)
io.KeySuper = ((SDL_GetModState() & KMOD_GUI) != 0);
return true;
}
case SDL_CONTROLLERAXISMOTION:
{
const SDL_GameControllerAxis axis = static_cast<SDL_GameControllerAxis>(event->caxis.axis);
switch (axis)
{
case SDL_CONTROLLER_AXIS_LEFTX:
{
if (event->caxis.value < 0)
{
g_ControllerNavInputs[ImGuiNavInput_LStickLeft] = event->caxis.value < -4000 ? (static_cast<float>(event->caxis.value) / -32768.0f) : 0.0f;
g_ControllerNavInputs[ImGuiNavInput_LStickRight] = 0.0f;
}
else
{
g_ControllerNavInputs[ImGuiNavInput_LStickLeft] = 0.0f;
g_ControllerNavInputs[ImGuiNavInput_LStickRight] = event->caxis.value > 4000 ? static_cast<float>(event->caxis.value) / 32767.0f : 0.0f;
}
return true;
}
break;
case SDL_CONTROLLER_AXIS_LEFTY:
{
if (event->caxis.value < 0)
{
g_ControllerNavInputs[ImGuiNavInput_LStickUp] = event->caxis.value < -4000 ? (static_cast<float>(event->caxis.value) / -32768.0f) : 0.0f;
g_ControllerNavInputs[ImGuiNavInput_LStickDown] = 0.0f;
}
else
{
g_ControllerNavInputs[ImGuiNavInput_LStickUp] = 0.0f;
g_ControllerNavInputs[ImGuiNavInput_LStickDown] = event->caxis.value > 4000 ? static_cast<float>(event->caxis.value) / 32767.0f : 0.0f;
}
return true;
}
default:
break;
}
}
break;
case SDL_CONTROLLERBUTTONDOWN:
case SDL_CONTROLLERBUTTONUP:
{
static constexpr unsigned int mapping[][2] = {{SDL_CONTROLLER_BUTTON_A, ImGuiNavInput_Activate},
{SDL_CONTROLLER_BUTTON_B, ImGuiNavInput_Cancel},
{SDL_CONTROLLER_BUTTON_X, ImGuiNavInput_Input},
{SDL_CONTROLLER_BUTTON_Y, ImGuiNavInput_Menu},
{SDL_CONTROLLER_BUTTON_LEFTSHOULDER, ImGuiNavInput_FocusPrev},
{SDL_CONTROLLER_BUTTON_RIGHTSHOULDER, ImGuiNavInput_FocusNext},
{SDL_CONTROLLER_BUTTON_DPAD_UP, ImGuiNavInput_DpadUp},
{SDL_CONTROLLER_BUTTON_DPAD_DOWN, ImGuiNavInput_DpadDown},
{SDL_CONTROLLER_BUTTON_DPAD_LEFT, ImGuiNavInput_DpadLeft},
{SDL_CONTROLLER_BUTTON_DPAD_RIGHT, ImGuiNavInput_DpadRight}};
for (int i = 0; i < IM_ARRAYSIZE(mapping); i++)
{
if (event->cbutton.button == mapping[i][0])
{
g_ControllerNavInputs[mapping[i][1]] = (event->type == SDL_CONTROLLERBUTTONDOWN) ? 1.0f : 0.0f;
return true;
}
}
}
break;
// Multi-viewport support
case SDL_WINDOWEVENT:
Uint8 window_event = event->window.event;
@ -350,6 +420,9 @@ void ImGui_ImplSDL2_NewFrame(SDL_Window* window)
io.DeltaTime = g_Time > 0 ? (float)((double)(current_time - g_Time) / frequency) : (float)(1.0f / 60.0f);
g_Time = current_time;
for (int i = 0; i < ImGuiNavInput_COUNT; i++)
io.NavInputs[i] += g_ControllerNavInputs[i];
ImGui_ImplSDL2_UpdateMousePosAndButtons();
ImGui_ImplSDL2_UpdateMouseCursor();
}