Move VisualBuilder into a new DevTools directory.

DevTools/VisualBuilder/VBWidget.h

@@ -0,0 +1,73 @@
+#pragma once
+
+#include <SharedGraphics/Rect.h>
+#include <AK/Retainable.h>
+#include <AK/Retained.h>
+#include <AK/Weakable.h>
+#include <AK/HashMap.h>
+#include <AK/Function.h>
+#include "VBWidgetType.h"
+
+class GPainter;
+class GVariant;
+class GWidget;
+class VBForm;
+class VBProperty;
+class VBWidgetPropertyModel;
+
+enum class Direction { None, Left, UpLeft, Up, UpRight, Right, DownRight, Down, DownLeft };
+template<typename Callback>
+inline void for_each_direction(Callback callback)
+{
+    callback(Direction::Left);
+    callback(Direction::UpLeft);
+    callback(Direction::Up);
+    callback(Direction::UpRight);
+    callback(Direction::Right);
+    callback(Direction::DownRight);
+    callback(Direction::Down);
+    callback(Direction::DownLeft);
+}
+
+class VBWidget : public Retainable<VBWidget>, public Weakable<VBWidget> {
+    friend class VBWidgetPropertyModel;
+public:
+    static Retained<VBWidget> create(VBWidgetType type, VBForm& form) { return adopt(*new VBWidget(type, form)); }
+    ~VBWidget();
+
+    bool is_selected() const;
+
+    Rect rect() const;
+    void set_rect(const Rect&);
+
+    Rect grabber_rect(Direction) const;
+    Direction grabber_at(const Point&) const;
+
+    GWidget* gwidget() { return m_gwidget; }
+
+    VBProperty& property(const String&);
+
+    void for_each_property(Function<void(VBProperty&)>);
+
+    VBWidgetPropertyModel& property_model() { return *m_property_model; }
+
+    void setup_properties();
+    void synchronize_properties();
+
+    void property_did_change();
+
+    Rect transform_origin_rect() const { return m_transform_origin_rect; }
+    void capture_transform_origin_rect();
+
+private:
+    VBWidget(VBWidgetType, VBForm&);
+
+    void add_property(const String& name, Function<GVariant(const GWidget&)>&& getter, Function<void(GWidget&, const GVariant&)>&& setter);
+
+    VBWidgetType m_type { VBWidgetType::None };
+    VBForm& m_form;
+    GWidget* m_gwidget { nullptr };
+    Vector<OwnPtr<VBProperty>> m_properties;
+    Retained<VBWidgetPropertyModel> m_property_model;
+    Rect m_transform_origin_rect;
+};