FullscreenUI: Add fullscreen/close buttons to landing window

src/frontend-common/fullscreen_ui.cpp

@@ -60,6 +60,7 @@ using ImGuiFullscreen::EndFullscreenColumnWindow;
 using ImGuiFullscreen::EndFullscreenWindow;
 using ImGuiFullscreen::EndMenuButtons;
 using ImGuiFullscreen::EnumChoiceButton;
+using ImGuiFullscreen::FloatingButton;
 using ImGuiFullscreen::LayoutScale;
 using ImGuiFullscreen::MenuButton;
 using ImGuiFullscreen::MenuButtonFrame;
@@ -731,21 +732,20 @@ void DrawLandingWindow()
       s_host_interface->RequestExit();
 
     {
-      bool about_visible, about_hovered, about_pressed;
-      ImRect about_rect;
-      ImGui::SetCursorPosY(ImGui::GetWindowHeight() - LayoutScale(50.0f));
-      about_pressed = MenuButtonFrame("About", true, ImGuiFullscreen::LAYOUT_MENU_BUTTON_HEIGHT_NO_SUMMARY,
-                                      &about_visible, &about_hovered, &about_rect.Min, &about_rect.Max);
+      ImVec2 fullscreen_pos;
+      if (FloatingButton(ICON_FA_WINDOW_CLOSE, 0.0f, 0.0f, -1.0f, -1.0f, 1.0f, 0.0f, true, g_large_font,
+                         &fullscreen_pos))
+      {
+        s_host_interface->RequestExit();
+      }
 
-      if (about_visible)
+      if (FloatingButton(ICON_FA_EXPAND, fullscreen_pos.x, 0.0f, -1.0f, -1.0f, -1.0f, 0.0f, true, g_large_font,
+                         &fullscreen_pos))
       {
-        ImGui::PushFont(g_large_font);
-        ImGui::RenderTextClipped(about_rect.Min, about_rect.Max, ICON_FA_QUESTION_CIRCLE, nullptr, nullptr,
-                                 ImVec2(1.0f, 0.0f), &about_rect);
-        ImGui::PopFont();
+        s_host_interface->RunLater([]() { s_host_interface->SetFullscreen(!s_host_interface->IsFullscreen()); });
       }
 
-      if (about_pressed)
+      if (FloatingButton(ICON_FA_QUESTION_CIRCLE, fullscreen_pos.x, 0.0f, -1.0f, -1.0f, -1.0f, 0.0f))
         OpenAboutWindow();
     }
 
@@ -2879,11 +2879,19 @@ void DrawAboutWindow()
 
     BeginMenuButtons();
     if (ActiveButton(ICON_FA_GLOBE "  GitHub Repository", false))
-      s_host_interface->ReportError("Go to https://github.com/stenzek/duckstation/");
+    {
+      s_host_interface->RunLater(
+        []() { s_host_interface->ReportError("Go to https://github.com/stenzek/duckstation/"); });
+    }
     if (ActiveButton(ICON_FA_BUG "  Issue Tracker", false))
-      s_host_interface->ReportError("Go to https://github.com/stenzek/duckstation/issues");
+    {
+      s_host_interface->RunLater(
+        []() { s_host_interface->ReportError("Go to https://github.com/stenzek/duckstation/issues"); });
+    }
     if (ActiveButton(ICON_FA_COMMENT "  Discord Server", false))
-      s_host_interface->ReportError("Go to https://discord.gg/Buktv3t");
+    {
+      s_host_interface->RunLater([]() { s_host_interface->ReportError("Go to https://discord.gg/Buktv3t"); });
+    }
 
     if (ActiveButton(ICON_FA_WINDOW_CLOSE "  Close", false))
     {

src/frontend-common/imgui_fullscreen.cpp

@@ -579,6 +579,91 @@ bool MenuImageButton(const char* title, const char* summary, ImTextureID user_te
   return pressed;
 }
 
+bool FloatingButton(const char* text, float x, float y, float width, float height, float anchor_x, float anchor_y,
+                    bool enabled, ImFont* font, ImVec2* out_position)
+{
+  const ImVec2 text_size(font->CalcTextSizeA(font->FontSize, std::numeric_limits<float>::max(), 0.0f, text));
+  const ImVec2& padding(ImGui::GetStyle().FramePadding);
+  if (width < 0.0f)
+    width = (padding.x * 2.0f) + text_size.x;
+  if (height < 0.0f)
+    height = (padding.y * 2.0f) + text_size.y;
+
+  const ImVec2 window_size(ImGui::GetWindowSize());
+  if (anchor_x == -1.0f)
+    x -= width;
+  else if (anchor_x == -0.5f)
+    x -= (width * 0.5f);
+  else if (anchor_x == 0.5f)
+    x = (window_size.x * 0.5f) - (width * 0.5f) - x;
+  else if (anchor_x == 1.0f)
+    x = window_size.x - width - x;
+  if (anchor_y == -1.0f)
+    y -= height;
+  else if (anchor_y == -0.5f)
+    y -= (height * 0.5f);
+  else if (anchor_y == 0.5f)
+    y = (window_size.y * 0.5f) - (height * 0.5f) - y;
+  else if (anchor_y == 1.0f)
+    y = window_size.y - height - y;
+
+  if (out_position)
+    *out_position = ImVec2(x, y);
+
+  ImGuiWindow* window = ImGui::GetCurrentWindow();
+  if (window->SkipItems)
+    return false;
+
+  const ImVec2 base(ImGui::GetWindowPos() + ImVec2(x, y));
+  ImRect bb(base, base + ImVec2(width, height));
+
+  const ImGuiID id = window->GetID(text);
+  if (enabled)
+  {
+    if (!ImGui::ItemAdd(bb, id))
+      return false;
+  }
+  else
+  {
+    if (ImGui::IsClippedEx(bb, id, false))
+      return false;
+  }
+
+  bool hovered;
+  bool held;
+  bool pressed;
+  if (enabled)
+  {
+    pressed = ImGui::ButtonBehavior(bb, id, &hovered, &held, 0);
+    if (hovered)
+    {
+      const ImU32 col = ImGui::GetColorU32(held ? ImGuiCol_ButtonActive : ImGuiCol_ButtonHovered, 1.0f);
+      ImGui::RenderFrame(bb.Min, bb.Max, col, true, 0.0f);
+    }
+  }
+  else
+  {
+    hovered = false;
+    pressed = false;
+    held = false;
+  }
+
+  bb.Min += padding;
+  bb.Max -= padding;
+
+  if (!enabled)
+    ImGui::PushStyleColor(ImGuiCol_Text, ImGui::GetColorU32(ImGuiCol_TextDisabled));
+
+  ImGui::PushFont(font);
+  ImGui::RenderTextClipped(bb.Min, bb.Max, text, nullptr, nullptr, ImVec2(0.0f, 0.0f), &bb);
+  ImGui::PopFont();
+
+  if (!enabled)
+    ImGui::PopStyleColor();
+
+  return pressed;
+}
+
 bool ToggleButton(const char* title, const char* summary, bool* v, bool enabled, float height, ImFont* font,
                   ImFont* summary_font)
 {

src/frontend-common/imgui_fullscreen.h

@@ -188,6 +188,9 @@ bool MenuImageButton(const char* title, const char* summary, ImTextureID user_te
                      bool enabled = true, float height = LAYOUT_MENU_BUTTON_HEIGHT,
                      const ImVec2& uv0 = ImVec2(0.0f, 0.0f), const ImVec2& uv1 = ImVec2(1.0f, 1.0f),
                      ImFont* font = g_large_font, ImFont* summary_font = g_medium_font);
+bool FloatingButton(const char* text, float x, float y, float width = -1.0f,
+                    float height = LAYOUT_MENU_BUTTON_HEIGHT_NO_SUMMARY, float anchor_x = 0.0f, float anchor_y = 0.0f,
+                    bool enabled = true, ImFont* font = g_large_font, ImVec2* out_position = nullptr);
 bool ToggleButton(const char* title, const char* summary, bool* v, bool enabled = true,
                   float height = LAYOUT_MENU_BUTTON_HEIGHT, ImFont* font = g_large_font,
                   ImFont* summary_font = g_medium_font);