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Backends: SDL2, SDL3: SDL_EVENT_MOUSE_WHEEL event doesn't require dividing by 100.0f on Emscripten. (#4019, #6096, #1463)
Ref https://github.com/libsdl-org/SDL/issues/10454#issuecomment-2434187317
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@ -21,6 +21,7 @@
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// CHANGELOG
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// (minor and older changes stripped away, please see git history for details)
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// 2024-10-24: Emscripten: from SDL 2.30.9, SDL_EVENT_MOUSE_WHEEL event doesn't require dividing by 100.0f.
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// 2024-09-09: use SDL_Vulkan_GetDrawableSize() when available. (#7967, #3190)
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// 2024-08-22: moved some OS/backend related function pointers from ImGuiIO to ImGuiPlatformIO:
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// - io.GetClipboardTextFn -> platform_io.Platform_GetClipboardTextFn
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@ -359,7 +360,7 @@ bool ImGui_ImplSDL2_ProcessEvent(const SDL_Event* event)
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float wheel_x = -(float)event->wheel.x;
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float wheel_y = (float)event->wheel.y;
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#endif
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#ifdef __EMSCRIPTEN__
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#if defined(__EMSCRIPTEN__) && !SDL_VERSION_ATLEAST(2,31,0)
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wheel_x /= 100.0f;
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#endif
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io.AddMouseSourceEvent(event->wheel.which == SDL_TOUCH_MOUSEID ? ImGuiMouseSource_TouchScreen : ImGuiMouseSource_Mouse);
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@ -21,6 +21,7 @@
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// CHANGELOG
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// (minor and older changes stripped away, please see git history for details)
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// 2024-10-24: Emscripten: SDL_EVENT_MOUSE_WHEEL event doesn't require dividing by 100.0f on Emscripten.
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// 2024-09-03: Update for SDL3 api changes: SDL_GetGamepads() memory ownership revert. (#7918, #7898, #7807)
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// 2024-08-22: moved some OS/backend related function pointers from ImGuiIO to ImGuiPlatformIO:
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// - io.GetClipboardTextFn -> platform_io.Platform_GetClipboardTextFn
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@ -338,9 +339,6 @@ bool ImGui_ImplSDL3_ProcessEvent(const SDL_Event* event)
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//IMGUI_DEBUG_LOG("wheel %.2f %.2f, precise %.2f %.2f\n", (float)event->wheel.x, (float)event->wheel.y, event->wheel.preciseX, event->wheel.preciseY);
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float wheel_x = -event->wheel.x;
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float wheel_y = event->wheel.y;
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#ifdef __EMSCRIPTEN__
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wheel_x /= 100.0f;
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#endif
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io.AddMouseSourceEvent(event->wheel.which == SDL_TOUCH_MOUSEID ? ImGuiMouseSource_TouchScreen : ImGuiMouseSource_Mouse);
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io.AddMouseWheelEvent(wheel_x, wheel_y);
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return true;
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@ -44,7 +44,8 @@ Breaking changes:
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Other changes:
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- Backends: DX12: Unmap() call specify written range. The range is informational and may be used by debug tools.
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- Backends: SDL3: Update for SDL3 api change: SDL_EVENT_MOUSE_WHEEL event doesn't require dividing by 100.0f
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on Emscripten target. (#4019, #6096, #1463)
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-----------------------------------------------------------------------
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VERSION 1.91.4 (Released 2024-10-18)
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