Added grid scroll area (has issues with many elements)

src/GUIStuff/Elements/GridScrollArea.cpp

@@ -0,0 +1,46 @@
+#include "GridScrollArea.hpp"
+#include "../ElementHelpers/ScrollAreaHelpers.hpp"
+#include "Helpers/ConvertVec.hpp"
+#include "../GUIManager.hpp"
+
+namespace GUIStuff {
+
+GridScrollArea::GridScrollArea(GUIManager& gui): Element(gui) {}
+
+void GridScrollArea::layout(const Clay_ElementId& id, const Options& options) {
+    using namespace ElementHelpers;
+
+    ScrollBarManyEntriesOptions opts;
+    opts.clipHorizontal = true;
+    opts.entryHeight = options.entryHeight;
+    opts.innerContentExtraCallback = [&, extraCallback = options.innerContentExtraCallback] (const ScrollArea::InnerContentParameters& contParams) {
+        rowWidth = std::fabs(contParams.containerDimensions.x());
+        if(extraCallback) extraCallback(contParams);
+    };
+    size_t entriesPerRow = static_cast<size_t>(rowWidth / options.entryMaximumWidth) + 1;
+    size_t rowCount = options.entryCount / entriesPerRow;
+    float entryWidth = rowWidth == 0.0f ? 100.0f : (rowWidth / entriesPerRow);
+    opts.entryCount = rowCount;
+    opts.elementContent = [&] (size_t rowIndex) {
+        CLAY_AUTO_ID({
+            .layout = {
+                .sizing = {.width = CLAY_SIZING_GROW(0), .height = CLAY_SIZING_FIXED(options.entryHeight)},
+                .childAlignment = { .x = options.childAlignmentX}
+            }
+        }) {
+            for(size_t i = 0; i < entriesPerRow; i++) {
+                size_t entryNum = rowIndex * entriesPerRow + i;
+                gui.new_id(static_cast<int64_t>(i), [&] {
+                    CLAY_AUTO_ID({
+                        .layout = {.sizing = {.width = CLAY_SIZING_FIXED(entryWidth), .height = CLAY_SIZING_FIXED(options.entryHeight)}}
+                    }) {
+                        options.elementContent(entryNum);
+                    }
+                });
+            }
+        }
+    };
+    scroll_area_many_entries(gui, "scroll many area", opts);
+}
+
+}