Update visual sample dependencies

The samples us some third-party libraries which have moved on since
these were ported to Magnum. Especially compatibility with CMake 4 and
newer; in addition some warnings have been fixed in third-party headers.

On the other hand the APIs have had some updates, so the code has been
updated to dodge some new deprecations.

Author: DuncanMcBain

ci/warning-suppresions.txt

@@ -1,8 +1 @@
 # Suppress warnings in external code from submodules
-
-[nontrivial-memcall]
-src:*/modules/imgui/*
-
-[deprecated-literal-operator]
-src:*/modules/corrade/*
-src:*/modules/magnum/*

modules/corrade

@@ -118,12 +118,12 @@ class FluidSimulationApp : public Magnum::Platform::Application {
  private:
   void keyPressEvent(KeyEvent& event) override final {
     // Reset fluid container to empty if SPACE key is pressed.
-    if (event.key() == KeyEvent::Key::Space) {
+    if (event.key() == Sdl2Application::Key::Space) {
       fluid_.Reset();
     }
   }
 
-  void mouseMoveEvent(MouseMoveEvent& event) override final {
+  void pointerMoveEvent(PointerMoveEvent& event) override final {
     // Get mouse position as fraction of window size.
     auto x{event.position().x() / float(windowSize().x())};
     auto y{1.0f - event.position().y() / float(windowSize().y())};

modules/imgui

@@ -5,5 +5,5 @@ target_link_libraries(GameOfLife PRIVATE
                                  Magnum::Magnum Magnum::GL Magnum::Application
                                  Magnum::Shaders Magnum::Primitives)
 
-target_compile_options(GameOfLife PUBLIC ${SYCL_FLAGS})
+target_compile_options(GameOfLife PUBLIC ${SYCL_FLAGS} -Wno-c++20-extensions)
 target_link_options(GameOfLife PUBLIC ${SYCL_FLAGS})

modules/magnum

@@ -166,18 +166,19 @@ class GameOfLifeApp : public Magnum::Platform::Application {
     }
   }
 
-  void mousePressEvent(MouseEvent& event) override {
+  void pointerPressEvent(PointerEvent& event) override {
     handleMouse(event.position().x(), event.position().y());
   }
 
-  void mouseMoveEvent(MouseMoveEvent& event) override {
+  void pointerMoveEvent(PointerMoveEvent& event) override {
     // Drag only if left button clicked
-    if ((event.buttons() & MouseMoveEvent::Button::Left)) {
+    using enum Magnum::Platform::Sdl2Application::Pointer;
+    if ((event.pointers() & MouseLeft)) {
       handleMouse(event.position().x(), event.position().y());
     }
   }
 
-  void mouseScrollEvent(MouseScrollEvent& event) override {
+  void scrollEvent(ScrollEvent& event) override {
     auto prevZoom = m_zoom;
     auto inc = event.offset().y();
     if (inc > 0) {
@@ -198,7 +199,7 @@ class GameOfLifeApp : public Magnum::Platform::Application {
 
   void keyPressEvent(KeyEvent& event) override {
     // (Un)pause on SPACE
-    if (event.key() == KeyEvent::Key::Space) {
+    if (event.key() == Sdl2Application::Key::Space) {
       m_paused = !m_paused;
     }
   }