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Backends: GLFW, Emscripten: fixes for canvas resizing, amends. (#6751)

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Amend 22a7d24
This commit is contained in:
ocornut
2023-12-19 15:57:00 +01:00
parent 22a7d241ff
commit 3cb805489b
5 changed files with 16 additions and 25 deletions
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25
backends/imgui_impl_glfw.cpp
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@ -20,7 +20,7 @@
// CHANGELOG
// (minor and older changes stripped away, please see git history for details)
// 2023-12-18: Emscripten: Change the size of the GLFW window according to the size of the canvas
// 2023-12-19: Emscripten: Added ImGui_ImplGlfw_InstallEmscriptenCanvasResizeCallback() to register canvas selector and auto-resize GLFW window.
// 2023-10-05: Inputs: Added support for extra ImGuiKey values: F13 to F24 function keys.
// 2023-07-18: Inputs: Revert ignoring mouse data on GLFW_CURSOR_DISABLED as it can be used differently. User may set ImGuiConfigFLags_NoMouse if desired. (#5625, #6609)
// 2023-06-12: Accept glfwGetTime() not returning a monotonically increasing value. This seems to happens on some Windows setup when peripherals disconnect, and is likely to also happen on browser + Emscripten. (#6491)
@ -814,40 +814,33 @@ void ImGui_ImplGlfw_NewFrame()
#ifdef __EMSCRIPTEN__
static EM_BOOL ImGui_ImplGlfw_OnCanvasSizeChange(int event_type, const EmscriptenUiEvent* event, void* user_data)
{
ImGui_ImplGlfw_Data* bd = (ImGui_ImplGlfw_Data *) user_data;
ImGui_ImplGlfw_Data* bd = (ImGui_ImplGlfw_Data*)user_data;
double canvas_width, canvas_height;
emscripten_get_element_css_size(bd->CanvasSelector, &canvas_width, &canvas_height);
glfwSetWindowSize(bd->Window, (int)canvas_width, (int)canvas_height);
return true;
}
static EM_BOOL ImGui_ImplGlfw_OnFullscreenChange(int event_type, const EmscriptenFullscreenChangeEvent* event, void* user_data)
static EM_BOOL ImGui_ImplEmscripten_FullscreenChangeCallback(int event_type, const EmscriptenFullscreenChangeEvent* event, void* user_data)
{
ImGui_ImplGlfw_Data* bd = (ImGui_ImplGlfw_Data *) user_data;
ImGui_ImplGlfw_Data* bd = (ImGui_ImplGlfw_Data*)user_data;
double canvas_width, canvas_height;
emscripten_get_element_css_size(bd->CanvasSelector, &canvas_width, &canvas_height);
glfwSetWindowSize(bd->Window, (int)canvas_width, (int)canvas_height);
return true;
}
/**
* @param canvas_selector A CSS selector, the event listener is applied to the first element that matches the query.
*/
void ImGui_ImplGlfw_SetEmscriptenCanvasSelector(const char *canvas_selector)
// 'canvas_selector' is a CSS selector. The event listener is applied to the first element that matches the query.
// STRING MUST PERSIST FOR THE APPLICATION DURATION. PLEASE USE A STRING LITERAL OR ENSURE POINTER WILL STAY VALID.
void ImGui_ImplGlfw_InstallEmscriptenCanvasResizeCallback(const char* canvas_selector)
{
IM_ASSERT(canvas_selector != nullptr);
ImGui_ImplGlfw_Data* bd = ImGui_ImplGlfw_GetBackendData();
IM_ASSERT(bd != nullptr && "Did you call ImGui_ImplGlfw_InitForXXX()?");
bd->CanvasSelector = canvas_selector;
bd->CanvasSelector = canvas_selector;
emscripten_set_resize_callback(EMSCRIPTEN_EVENT_TARGET_WINDOW, bd, false, ImGui_ImplGlfw_OnCanvasSizeChange);
emscripten_set_fullscreenchange_callback(EMSCRIPTEN_EVENT_TARGET_DOCUMENT, bd, false, ImGui_ImplGlfw_OnFullscreenChange);
emscripten_set_fullscreenchange_callback(EMSCRIPTEN_EVENT_TARGET_DOCUMENT, bd, false, ImGui_ImplEmscripten_FullscreenChangeCallback);
// Change the size of the GLFW window according to the size of the canvas
ImGui_ImplGlfw_OnCanvasSizeChange(EMSCRIPTEN_EVENT_RESIZE, {}, bd);

2
backends/imgui_impl_glfw.h
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@ -32,7 +32,7 @@ IMGUI_IMPL_API void ImGui_ImplGlfw_NewFrame();
// Emscripten related initialization phase methods
#ifdef __EMSCRIPTEN__
IMGUI_IMPL_API void ImGui_ImplGlfw_SetEmscriptenCanvasSelector(const char* canvas_selector);
IMGUI_IMPL_API void ImGui_ImplGlfw_InstallEmscriptenCanvasResizeCallback(const char* canvas_selector);
#endif
// GLFW callbacks install