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Backends: SDL2: rework new API as ImGui_ImplSDL2_SetGamepadMode(). (#3884, #6559, #6890, #7180)

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Code is simpler this way.
This commit is contained in:
ocornut 2024-02-14 11:30:43 +01:00
parent 9dfa2397de
commit 262e30e300
3 changed files with 20 additions and 37 deletions
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48
backends/imgui_impl_sdl2.cpp
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@ -21,7 +21,7 @@
// CHANGELOG // CHANGELOG
// (minor and older changes stripped away, please see git history for details) // (minor and older changes stripped away, please see git history for details)
// 2024-02-13: Inputs: Handle gamepad disconnection. Added ImGui_ImplSDL2_SetGamepadModeAutoFirst(), ImGui_ImplSDL2_SetGamepadModeAutoAll(), ImGui_ImplSDL2_SetGamepadModeManual(). // 2024-02-14: Inputs: Handle gamepad disconnection. Added ImGui_ImplSDL2_SetGamepadMode().
// 2023-10-05: Inputs: Added support for extra ImGuiKey values: F13 to F24 function keys, app back/forward keys. // 2023-10-05: Inputs: Added support for extra ImGuiKey values: F13 to F24 function keys, app back/forward keys.
// 2023-04-06: Inputs: Avoid calling SDL_StartTextInput()/SDL_StopTextInput() as they don't only pertain to IME. It's unclear exactly what their relation is to IME. (#6306) // 2023-04-06: Inputs: Avoid calling SDL_StartTextInput()/SDL_StopTextInput() as they don't only pertain to IME. It's unclear exactly what their relation is to IME. (#6306)
// 2023-04-04: Inputs: Added support for io.AddMouseSourceEvent() to discriminate ImGuiMouseSource_Mouse/ImGuiMouseSource_TouchScreen. (#2702) // 2023-04-04: Inputs: Added support for io.AddMouseSourceEvent() to discriminate ImGuiMouseSource_Mouse/ImGuiMouseSource_TouchScreen. (#2702)
@ -102,13 +102,6 @@
#define SDL_HAS_VULKAN SDL_VERSION_ATLEAST(2,0,6) #define SDL_HAS_VULKAN SDL_VERSION_ATLEAST(2,0,6)
// SDL Data // SDL Data
enum ImGui_ImplSDL2_GamepadMode
{
ImGui_ImplSDL2_GamepadMode_AutoFirst, // (Default) Use first available gamepad
ImGui_ImplSDL2_GamepadMode_AutoAll, // Use all available gamepad
ImGui_ImplSDL2_GamepadMode_Manual,
};
struct ImGui_ImplSDL2_Data struct ImGui_ImplSDL2_Data
{ {
SDL_Window* Window; SDL_Window* Window;
@ -612,29 +605,22 @@ static void ImGui_ImplSDL2_CloseGamepads()
bd->Gamepads.resize(0); bd->Gamepads.resize(0);
} }
void ImGui_ImplSDL2_SetGamepadModeAutoFirst() void ImGui_ImplSDL2_SetGamepadMode(ImGui_ImplSDL2_GamepadMode mode, struct _SDL_GameController** manual_gamepads_array, int manual_gamepads_count)
{ {
ImGui_ImplSDL2_Data* bd = ImGui_ImplSDL2_GetBackendData(); ImGui_ImplSDL2_Data* bd = ImGui_ImplSDL2_GetBackendData();
ImGui_ImplSDL2_CloseGamepads(); ImGui_ImplSDL2_CloseGamepads();
bd->GamepadMode = ImGui_ImplSDL2_GamepadMode_AutoFirst; if (mode == ImGui_ImplSDL2_GamepadMode_Manual)
bd->WantUpdateGamepadsList = true; {
} IM_ASSERT(manual_gamepads_array != nullptr && manual_gamepads_count > 0);
for (int n = 0; n < manual_gamepads_count; n++)
void ImGui_ImplSDL2_SetGamepadModeAutoAll() bd->Gamepads.push_back(manual_gamepads_array[n]);
{ }
ImGui_ImplSDL2_Data* bd = ImGui_ImplSDL2_GetBackendData(); else
ImGui_ImplSDL2_CloseGamepads(); {
bd->GamepadMode = ImGui_ImplSDL2_GamepadMode_AutoAll; IM_ASSERT(manual_gamepads_array == nullptr && manual_gamepads_count <= 0);
bd->WantUpdateGamepadsList = true; bd->WantUpdateGamepadsList = true;
} }
bd->GamepadMode = mode;
void ImGui_ImplSDL2_SetGamepadModeManual(struct _SDL_GameController** gamepads_array, int gamepads_count)
{
ImGui_ImplSDL2_Data* bd = ImGui_ImplSDL2_GetBackendData();
ImGui_ImplSDL2_CloseGamepads();
for (int n = 0; n < gamepads_count; n++)
bd->Gamepads.push_back(gamepads_array[n]);
bd->GamepadMode = ImGui_ImplSDL2_GamepadMode_Manual;
} }
static void ImGui_ImplSDL2_UpdateGamepadButton(ImGui_ImplSDL2_Data* bd, ImGuiIO& io, ImGuiKey key, SDL_GameControllerButton button_no) static void ImGui_ImplSDL2_UpdateGamepadButton(ImGui_ImplSDL2_Data* bd, ImGuiIO& io, ImGuiKey key, SDL_GameControllerButton button_no)
@ -645,13 +631,13 @@ static void ImGui_ImplSDL2_UpdateGamepadButton(ImGui_ImplSDL2_Data* bd, ImGuiIO&
io.AddKeyEvent(key, merged_value); io.AddKeyEvent(key, merged_value);
} }
static inline float Saturate(float v) { return v < 0.0f ? 0.0f : v > 1.0f ? 1.0f : v; }
static void ImGui_ImplSDL2_UpdateGamepadAnalog(ImGui_ImplSDL2_Data* bd, ImGuiIO& io, ImGuiKey key, SDL_GameControllerAxis axis_no, float v0, float v1) static void ImGui_ImplSDL2_UpdateGamepadAnalog(ImGui_ImplSDL2_Data* bd, ImGuiIO& io, ImGuiKey key, SDL_GameControllerAxis axis_no, float v0, float v1)
{ {
float merged_value = 0.0f; float merged_value = 0.0f;
for (SDL_GameController* gamepad : bd->Gamepads) for (SDL_GameController* gamepad : bd->Gamepads)
{ {
float vn = (float)(SDL_GameControllerGetAxis(gamepad, axis_no) - v0) / (float)(v1 - v0); float vn = Saturate((float)(SDL_GameControllerGetAxis(gamepad, axis_no) - v0) / (float)(v1 - v0));
vn = (vn < 0.0f) ? 0.0f : (vn > 1.0f) ? 1.0f : vn;
if (merged_value < vn) if (merged_value < vn)
merged_value = vn; merged_value = vn;
} }
@ -682,8 +668,6 @@ static void ImGui_ImplSDL2_UpdateGamepads()
// FIXME: Technically feeding gamepad shouldn't depend on this now that they are regular inputs. // FIXME: Technically feeding gamepad shouldn't depend on this now that they are regular inputs.
if ((io.ConfigFlags & ImGuiConfigFlags_NavEnableGamepad) == 0) if ((io.ConfigFlags & ImGuiConfigFlags_NavEnableGamepad) == 0)
return; return;
// Get gamepad
io.BackendFlags &= ~ImGuiBackendFlags_HasGamepad; io.BackendFlags &= ~ImGuiBackendFlags_HasGamepad;
if (bd->Gamepads.Size == 0) if (bd->Gamepads.Size == 0)
return; return;

7
backends/imgui_impl_sdl2.h
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@ -37,11 +37,10 @@ IMGUI_IMPL_API void ImGui_ImplSDL2_Shutdown();
IMGUI_IMPL_API void ImGui_ImplSDL2_NewFrame(); IMGUI_IMPL_API void ImGui_ImplSDL2_NewFrame();
IMGUI_IMPL_API bool ImGui_ImplSDL2_ProcessEvent(const SDL_Event* event); IMGUI_IMPL_API bool ImGui_ImplSDL2_ProcessEvent(const SDL_Event* event);
// Gamepad selection automatically starts in Auto mode, picking first available SDL_GameController. You may override this. // Gamepad selection automatically starts in AutoFirst mode, picking first available SDL_Gamepad. You may override this.
// When using manual mode, caller is responsible for opening/closing gamepad. // When using manual mode, caller is responsible for opening/closing gamepad.
IMGUI_IMPL_API void ImGui_ImplSDL2_SetGamepadModeAutoFirst(); // Use first available gamepad (default) enum ImGui_ImplSDL2_GamepadMode { ImGui_ImplSDL2_GamepadMode_AutoFirst, ImGui_ImplSDL2_GamepadMode_AutoAll, ImGui_ImplSDL2_GamepadMode_Manual };
IMGUI_IMPL_API void ImGui_ImplSDL2_SetGamepadModeAutoAll(); IMGUI_IMPL_API void ImGui_ImplSDL2_SetGamepadMode(ImGui_ImplSDL2_GamepadMode mode, struct _SDL_GameController** manual_gamepads_array = NULL, int manual_gamepads_count = -1);
IMGUI_IMPL_API void ImGui_ImplSDL2_SetGamepadModeManual(struct _SDL_GameController** gamepads_array, int gamepads_count);
#ifndef IMGUI_DISABLE_OBSOLETE_FUNCTIONS #ifndef IMGUI_DISABLE_OBSOLETE_FUNCTIONS
static inline void ImGui_ImplSDL2_NewFrame(SDL_Window*) { ImGui_ImplSDL2_NewFrame(); } // 1.84: removed unnecessary parameter static inline void ImGui_ImplSDL2_NewFrame(SDL_Window*) { ImGui_ImplSDL2_NewFrame(); } // 1.84: removed unnecessary parameter

2
docs/CHANGELOG.txt
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@ -52,7 +52,7 @@ Other changes:
a scrollbar when contents is over parent viewport size. (#7287, #7063) [@ZingBallyhoo] a scrollbar when contents is over parent viewport size. (#7287, #7063) [@ZingBallyhoo]
- Backends: SDL2: Handle gamepad disconnection + fixed increasing gamepad reference counter - Backends: SDL2: Handle gamepad disconnection + fixed increasing gamepad reference counter
continuously. Added support for multiple simultaneous gamepads. continuously. Added support for multiple simultaneous gamepads.
Added ImGui_ImplSDL2_SetGamepadModeXXX() functions to select whether to automatically pick Added ImGui_ImplSDL2_SetGamepadMode()) function to select whether to automatically pick
first available gamepad, all gamepads, or specific gamepads. first available gamepad, all gamepads, or specific gamepads.
(#3884, #6559, #6890) [@ocornut, @lethal-guitar, @wn2000, @bog-dan-ro] (#3884, #6559, #6890) [@ocornut, @lethal-guitar, @wn2000, @bog-dan-ro]
- Backends: SDLRenderer3: query newly added SDL_RenderViewportSet() to not restore - Backends: SDLRenderer3: query newly added SDL_RenderViewportSet() to not restore