Misc (#19)

* get image returns optional<Mat> instead of unique_ptr<Mat> * introduce complexity * rename image load function * add example for a basic reader for binary image files * fix windows build? * add a status bar underneath the menu bar * use status bar in custom_0 example app * clang formats * packing w/ pragma push * add "Save As" functions to image views * resize over reserve * rm local override uri * add simple thread pool * rename to simple_thread_pool * get rid of useless renderlib * document version inc * extract hardcoded values to in-header * clang format patch * clone registered image in custom_0 * document binary-file header * minor fixes * clang format * rm unused render cmake
2026-01-23 23:00:35 +00:00
parent e3e161ce52
commit b37814204f
52 changed files with 712 additions and 207 deletions
@@ -4,6 +4,56 @@
 #include "imgui.h"
 #include "imgui_impl_glfw.h"
 #include "imgui_impl_opengl3.h"
+#include "imgui_internal.h"
+#include "utilities/simple_thread_pool.hpp"
+
+// see https://github.com/ocornut/imgui/issues/3518
+bool PixelBeginStatusBar()
+{
+    using namespace ImGui;
+    ImGuiContext& g = *GImGui;
+    ImGuiViewportP* viewport = (ImGuiViewportP*)(void*)GetMainViewport();
+
+    SetCurrentViewport(NULL, viewport);
+
+    g.NextWindowData.MenuBarOffsetMinVal = ImVec2(
+        g.Style.DisplaySafeAreaPadding.x, ImMax(g.Style.DisplaySafeAreaPadding.y - g.Style.FramePadding.y, 0.0f));
+    ImGuiWindowFlags window_flags =
+        ImGuiWindowFlags_NoScrollbar | ImGuiWindowFlags_NoSavedSettings | ImGuiWindowFlags_MenuBar;
+    float height = GetFrameHeight();
+    bool is_open = BeginViewportSideBar("##MainStatusBar", viewport, ImGuiDir_Up, height, window_flags);
+    g.NextWindowData.MenuBarOffsetMinVal = ImVec2(0.0f, 0.0f);
+    if (!is_open)
+    {
+        End();
+        return false;
+    }
+
+    g.CurrentWindow->Flags &= ~ImGuiWindowFlags_NoSavedSettings;
+    BeginMenuBar();
+    return is_open;
+}
+
+void PixelEndStatusBar()
+{
+    using namespace ImGui;
+    ImGuiContext& g = *GImGui;
+    if (!g.CurrentWindow->DC.MenuBarAppending)
+    {
+        IM_ASSERT_USER_ERROR(0, "Calling EndMainMenuBar() not from a menu-bar!");
+        return;
+    }
+
+    EndMenuBar();
+    g.CurrentWindow->Flags |= ImGuiWindowFlags_NoSavedSettings;
+
+    if (g.CurrentWindow == g.NavWindow && g.NavLayer == ImGuiNavLayer_Main && !g.NavAnyRequest && g.ActiveId == 0)
+        FocusTopMostWindowUnderOne(
+            g.NavWindow, NULL, NULL,
+            ImGuiFocusRequestFlags_UnlessBelowModal | ImGuiFocusRequestFlags_RestoreFocusedChild);
+
+    End();
+}

 /// @brief GLFW error callback function.
 /// @param error The error code.
@@ -193,6 +243,18 @@ void pixelarium::application::AppGLFW::MenuBar()

        ImGui::EndMainMenuBar();
    }
+
+    if (show_status_ && PixelBeginStatusBar())
+    {
+        if (ImGui::Button("Ok", {20, 20}))
+        {
+            show_status_ = false;
+            status_message_.clear();
+        }
+
+        ImGui::Text("%s", status_message_.c_str());
+        PixelEndStatusBar();
+    }
 }

 /// @brief Allows the user to select the log level via a combo box.
@@ -213,3 +275,14 @@ void pixelarium::application::AppGLFW::LogLevelSelect()
        ImGui::EndCombo();
    }
 }
+
+void pixelarium::application::AppGLFW::SetStatusTimed(const std::string& status, size_t seconds)
+{
+    SetStatus(status);
+    utils::simple_thread_pool::run_asynch(
+        [this, seconds]()
+        {
+            std::this_thread::sleep_for(std::chrono::seconds(seconds));
+            ResetStatus();
+        });
+}