Clean project structure.

src/ui/ui_controls/HorizontalSpacer.cpp

@@ -0,0 +1,54 @@
+#include "HorizontalSpacer.h"
+
+#include <algorithm>
+#include <numeric>
+#include <iostream>
+
+HorizontalSpacer::HorizontalSpacer()
+    : Widget(),
+      mScales()
+{
+    mName = "HorizontalSpacer";
+}
+
+std::unique_ptr<HorizontalSpacer> HorizontalSpacer::Create()
+{
+    return std::make_unique<HorizontalSpacer>();
+}
+
+void HorizontalSpacer::addWidget(WidgetUPtr widget)
+{
+    addWidgetWithScale(std::move(widget), 1.0);
+}
+
+void HorizontalSpacer::addWidgetWithScale(WidgetUPtr widget, double scale)
+{
+    Widget::addWidget(std::move(widget));
+    mScales.push_back(scale);
+}
+
+void HorizontalSpacer::updateChildLocations()
+{
+    double scaleSum  = std::accumulate(mScales.begin(), mScales.end(), 0.0);
+    double offset = 0;
+    double height = mSize.mHeight;
+    if (mSize.mMaxHeight > 0 && height > mSize.mMaxHeight)
+    {
+        height = mSize.mMaxHeight;
+    }
+
+    for(std::size_t idx=0; idx<mChildren.size(); idx++)
+    {
+        auto& child = mChildren[idx];
+        double scale = mScales[idx];
+        double delta = height * (scale/scaleSum);
+        auto size = child->getSize();
+        if (size.mMaxHeight > 0 && delta > size.mMaxHeight)
+        {
+            delta = size.mMaxHeight;
+        }
+        child->setBounds(mSize.mWidth, unsigned(delta));
+        child->setLocation(DiscretePoint(mLocation.getX(), mLocation.getY() + unsigned(offset)));
+        offset += delta;
+    }
+}