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move cursor setting helper function implementations to the bottom of the file

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This commit is contained in:
SlowRiot 2026-03-31 19:43:50 +01:00
parent a8de6dadc7
commit c4b6c689ac
1 changed files with 66 additions and 62 deletions
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128
backends/imgui_impl_emscripten.cpp
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@ -269,68 +269,6 @@ ImGui_ImplEmscripten_Data* ImGui_ImplEmscripten_GetBackendData()
return ImGui::GetCurrentContext() ? static_cast<ImGui_ImplEmscripten_Data*>(ImGui::GetIO().BackendPlatformUserData) : nullptr;
}
void set_cursor_if_necessary(emscripten_browser_cursor_internal::cursor& current_cursor, emscripten_browser_cursor_internal::cursor new_cursor)
{
if (new_cursor == current_cursor) return; // don't do anything if the current cursor is already set
current_cursor = new_cursor;
emscripten_browser_cursor_internal::set(new_cursor);
}
void update_cursor(ImGui_ImplEmscripten_Data* bd)
{
// Sync any cursor changes due to ImGui to the browser's cursor
if (ImGui::GetIO().WantCaptureMouse) // mouse is hovering over the gui
{
if (!bd->CursorToRestore)
{
bd->CursorToRestore = emscripten_browser_cursor_internal::get_string(); // back up the existing cursor state when entering the imgui capture space
}
switch (ImGui::GetMouseCursor())
{
case ImGuiMouseCursor_None:
set_cursor_if_necessary(bd->CurrentCursor, emscripten_browser_cursor_internal::cursor::none);
break;
case ImGuiMouseCursor_Arrow:
set_cursor_if_necessary(bd->CurrentCursor, emscripten_browser_cursor_internal::cursor::cursor_default);
break;
case ImGuiMouseCursor_TextInput: // When hovering over InputText, etc.
set_cursor_if_necessary(bd->CurrentCursor, emscripten_browser_cursor_internal::cursor::text);
break;
case ImGuiMouseCursor_ResizeAll: // (Unused by Dear ImGui functions)
set_cursor_if_necessary(bd->CurrentCursor, emscripten_browser_cursor_internal::cursor::move);
break;
case ImGuiMouseCursor_ResizeNS: // When hovering over a horizontal border
set_cursor_if_necessary(bd->CurrentCursor, emscripten_browser_cursor_internal::cursor::ns_resize);
break;
case ImGuiMouseCursor_ResizeEW: // When hovering over a vertical border or a column
set_cursor_if_necessary(bd->CurrentCursor, emscripten_browser_cursor_internal::cursor::ew_resize);
break;
case ImGuiMouseCursor_ResizeNESW: // When hovering over the bottom-left corner of a window
set_cursor_if_necessary(bd->CurrentCursor, emscripten_browser_cursor_internal::cursor::nesw_resize);
break;
case ImGuiMouseCursor_ResizeNWSE: // When hovering over the bottom-right corner of a window
set_cursor_if_necessary(bd->CurrentCursor, emscripten_browser_cursor_internal::cursor::nwse_resize);
break;
case ImGuiMouseCursor_Hand: // (Unused by Dear ImGui functions. Use for e.g. hyperlinks)
set_cursor_if_necessary(bd->CurrentCursor, emscripten_browser_cursor_internal::cursor::pointer);
break;
case ImGuiMouseCursor_NotAllowed: // When hovering something with disallowed interaction. Usually a crossed circle.
set_cursor_if_necessary(bd->CurrentCursor, emscripten_browser_cursor_internal::cursor::not_allowed);
break;
}
}
else // mouse is away from the gui, hovering over some other part of the viewport
{
if (bd->CursorToRestore)
{
emscripten_browser_cursor_internal::set(*bd->CursorToRestore); // restore the previous cursor state when leaving the imgui capture space
bd->CursorToRestore = std::nullopt;
bd->CurrentCursor = emscripten_browser_cursor_internal::cursor::invalid; // select an unused value for current cursor to force a set next time set_cursor_if_necessary is called
}
}
}
} // anonymous namespace
void ImGui_ImplEmscripten_Init()
@ -595,6 +533,72 @@ void ImGui_ImplEmscripten_Shutdown()
IM_DELETE(bd);
}
namespace {
void set_cursor_if_necessary(emscripten_browser_cursor_internal::cursor& current_cursor, emscripten_browser_cursor_internal::cursor new_cursor)
{
if (new_cursor == current_cursor) return; // don't do anything if the current cursor is already set
current_cursor = new_cursor;
emscripten_browser_cursor_internal::set(new_cursor);
}
void update_cursor(ImGui_ImplEmscripten_Data* bd)
{
// Sync any cursor changes due to ImGui to the browser's cursor
if (ImGui::GetIO().WantCaptureMouse) // mouse is hovering over the gui
{
if (!bd->CursorToRestore)
{
bd->CursorToRestore = emscripten_browser_cursor_internal::get_string(); // back up the existing cursor state when entering the imgui capture space
}
switch (ImGui::GetMouseCursor())
{
case ImGuiMouseCursor_None:
set_cursor_if_necessary(bd->CurrentCursor, emscripten_browser_cursor_internal::cursor::none);
break;
case ImGuiMouseCursor_Arrow:
set_cursor_if_necessary(bd->CurrentCursor, emscripten_browser_cursor_internal::cursor::cursor_default);
break;
case ImGuiMouseCursor_TextInput: // When hovering over InputText, etc.
set_cursor_if_necessary(bd->CurrentCursor, emscripten_browser_cursor_internal::cursor::text);
break;
case ImGuiMouseCursor_ResizeAll: // (Unused by Dear ImGui functions)
set_cursor_if_necessary(bd->CurrentCursor, emscripten_browser_cursor_internal::cursor::move);
break;
case ImGuiMouseCursor_ResizeNS: // When hovering over a horizontal border
set_cursor_if_necessary(bd->CurrentCursor, emscripten_browser_cursor_internal::cursor::ns_resize);
break;
case ImGuiMouseCursor_ResizeEW: // When hovering over a vertical border or a column
set_cursor_if_necessary(bd->CurrentCursor, emscripten_browser_cursor_internal::cursor::ew_resize);
break;
case ImGuiMouseCursor_ResizeNESW: // When hovering over the bottom-left corner of a window
set_cursor_if_necessary(bd->CurrentCursor, emscripten_browser_cursor_internal::cursor::nesw_resize);
break;
case ImGuiMouseCursor_ResizeNWSE: // When hovering over the bottom-right corner of a window
set_cursor_if_necessary(bd->CurrentCursor, emscripten_browser_cursor_internal::cursor::nwse_resize);
break;
case ImGuiMouseCursor_Hand: // (Unused by Dear ImGui functions. Use for e.g. hyperlinks)
set_cursor_if_necessary(bd->CurrentCursor, emscripten_browser_cursor_internal::cursor::pointer);
break;
case ImGuiMouseCursor_NotAllowed: // When hovering something with disallowed interaction. Usually a crossed circle.
set_cursor_if_necessary(bd->CurrentCursor, emscripten_browser_cursor_internal::cursor::not_allowed);
break;
}
}
else // mouse is away from the gui, hovering over some other part of the viewport
{
if (bd->CursorToRestore)
{
emscripten_browser_cursor_internal::set(*bd->CursorToRestore); // restore the previous cursor state when leaving the imgui capture space
bd->CursorToRestore = std::nullopt;
bd->CurrentCursor = emscripten_browser_cursor_internal::cursor::invalid; // select an unused value for current cursor to force a set next time set_cursor_if_necessary is called
}
}
}
} // anonymous namespace
void ImGui_ImplEmscripten_NewFrame()
{
ImGui_ImplEmscripten_Data* bd{ImGui_ImplEmscripten_GetBackendData()};