1 files changed, 112 insertions, 0 deletions
diff --git a/src/components/Scrollbar.cpp b/src/components/Scrollbar.cpp
new file mode 100644
index 0000000..76c5c1a
--- /dev/null
+++ b/src/components/Scrollbar.cpp
@@ -0,0 +1,112 @@
+#include "Scrollbar.hpp"
+
+namespace cgeditor {
+Scrollbar::Scrollbar(Status *s, bool IsHorizontal) : Component(s) {
+  this->IsHorizontal = IsHorizontal;
+
+  bg.prop = Property::Rectangle | Property::Scrollbarbg;
+  bar.prop = Property::Rectangle | Property::Scrollbar;
+
+  if (IsHorizontal) {
+    bg.prop |= Property::Horizontal;
+    bar.x = 0;
+  } else {
+    bar.y = 0;
+  }
+
+  DragX = 0;
+  DragY = 0;
+  Trigger = false;
+}
+
+void Scrollbar::Refresh() {
+  if (IsHorizontal) {
+    bg.y = status->CanvasHeight - status->ScrollbarWidth;
+    bg.width = status->CanvasWidth - status->ScrollbarWidth;
+    bg.height = status->ScrollbarWidth;
+    bar.y = bg.y;
+  } else {
+    bg.x = status->CanvasWidth - status->ScrollbarWidth;
+    bg.width = status->CanvasWidth;
+    bg.height = status->CanvasHeight - status->ScrollbarWidth;
+    bar.x = bg.x;
+  }
+
+  bar.width = bg.width;
+  bar.height = bg.height;
+
+  // Compute move table canvas
+  double MTCanvasHeight = status->CanvasHeight - status->ScrollbarWidth;
+  double MTCanvasWidth = status->CanvasWidth - status->ScrollbarWidth;
+
+  bool shouldScroll = false;
+  if (!IsHorizontal && status->MoveTableMaxY > MTCanvasHeight) {
+    bar.height =
+        std::ceil(bg.height * (MTCanvasHeight / status->MoveTableMaxY));
+    shouldScroll = true;
+  }
+
+  if (IsHorizontal && status->MoveTableMaxX > MTCanvasWidth) {
+    bar.width = std::ceil(bg.width * (MTCanvasWidth / status->MoveTableMaxX));
+    shouldScroll = true;
+  }
+
+  if (shouldScroll) {
+    if (IsHorizontal && status->EventHScroll != 0) {
+      double percent = status->EventHScroll / status->MoveTableMaxX;
+      double maxScroll = bg.width - bar.width;
+      bar.x += maxScroll * percent;
+      bar.x = std::max(bg.x, bar.x);
+      bar.x = std::min(bg.x + maxScroll, bar.x);
+      double curScroll = bar.x - bg.x;
+      double scrollPercent = curScroll / maxScroll;
+      status->ScrollX =
+          -(status->MoveTableMaxX - MTCanvasWidth) * scrollPercent;
+      status->EventHScroll = 0;
+    } else if (status->EventVScroll != 0) {
+      double percent = status->EventVScroll / status->MoveTableMaxY;
+      double maxScroll = bg.height - bar.height;
+      bar.y += maxScroll * percent;
+      bar.y = std::max(bg.y, bar.y);
+      bar.y = std::min(bg.y + maxScroll, bar.y);
+      double curScroll = bar.y - bg.y;
+      double scrollPercent = curScroll / maxScroll;
+      status->ScrollY =
+          -(status->MoveTableMaxY - MTCanvasHeight) * scrollPercent;
+      status->EventVScroll = 0;
+    } else if (status->LeftClick &&
+               bar.IsOver(status->MouseX, status->MouseY)) {
+      DragX = bar.x;
+      DragY = bar.y;
+      Trigger = true;
+    } else if (Trigger && status->IsDrag) {
+      if (IsHorizontal) {
+        bar.x = DragX + (status->MouseX - status->LastMouseClicX);
+        bar.x = std::max(bg.x, bar.x);
+        double maxScroll = bg.width - bar.width;
+        bar.x = std::min(bg.x + maxScroll, bar.x);
+        double curScroll = bar.x - bg.x;
+        double scrollPercent = curScroll / maxScroll;
+        status->ScrollX =
+            -(status->MoveTableMaxX - MTCanvasWidth) * scrollPercent;
+      } else {
+        bar.y = DragY + (status->MouseY - status->LastMouseClicY);
+        bar.y = std::max(bg.y, bar.y);
+        double maxScroll = bg.height - bar.height;
+        bar.y = std::min(bg.y + maxScroll, bar.y);
+        double curScroll = bar.y - bg.y;
+        double scrollPercent = curScroll / maxScroll;
+        status->ScrollY =
+            -(status->MoveTableMaxY - MTCanvasHeight) * scrollPercent;
+      }
+    } else {
+      Trigger = false;
+    }
+  }
+
+  elements.clear();
+  elements.push_back(bg);
+  elements.push_back(bar);
+}
+
+} // namespace cgeditor
+\ No newline at end of file