Rename all the LibGUI classes to GClassName.

LibGUI/GWidget.h

@@ -0,0 +1,99 @@
+#pragma once
+
+#include "GEvent.h"
+#include "GObject.h"
+#include <SharedGraphics/Rect.h>
+#include <SharedGraphics/Color.h>
+#include <SharedGraphics/Font.h>
+#include <AK/AKString.h>
+
+class GraphicsBitmap;
+class GWindow;
+
+class GWidget : public GObject {
+public:
+    explicit GWidget(GWidget* parent = nullptr);
+    virtual ~GWidget();
+
+    virtual void event(GEvent&) override;
+    virtual void paintEvent(GPaintEvent&);
+    virtual void showEvent(GShowEvent&);
+    virtual void hideEvent(GHideEvent&);
+    virtual void keyDownEvent(GKeyEvent&);
+    virtual void keyUpEvent(GKeyEvent&);
+    virtual void mouseMoveEvent(GMouseEvent&);
+    virtual void mouseDownEvent(GMouseEvent&);
+    virtual void mouseUpEvent(GMouseEvent&);
+
+    Rect relativeRect() const { return m_relativeRect; }
+    Point relativePosition() const { return m_relativeRect.location(); }
+
+    int x() const { return m_relativeRect.x(); }
+    int y() const { return m_relativeRect.y(); }
+    int width() const { return m_relativeRect.width(); }
+    int height() const { return m_relativeRect.height(); }
+
+    Rect rect() const { return { 0, 0, width(), height() }; }
+    Size size() const { return m_relativeRect.size(); }
+
+    void update();
+    void repaint(const Rect&);
+
+    bool isFocused() const;
+    void setFocus(bool);
+
+    struct HitTestResult {
+        GWidget* widget { nullptr };
+        int localX { 0 };
+        int localY { 0 };
+    };
+    HitTestResult hitTest(int x, int y);
+
+    virtual const char* class_name() const override { return "GWidget"; }
+
+    void setWindowRelativeRect(const Rect&, bool should_update = true);
+
+    Color backgroundColor() const { return m_backgroundColor; }
+    Color foregroundColor() const { return m_foregroundColor; }
+
+    void setBackgroundColor(Color color) { m_backgroundColor = color; }
+    void setForegroundColor(Color color) { m_foregroundColor = color; }
+
+    GWindow* window()
+    {
+        if (auto* pw = parentWidget())
+            return pw->window();
+        return m_window;
+    }
+
+    const GWindow* window() const
+    {
+        if (auto* pw = parentWidget())
+            return pw->window();
+        return m_window;
+    }
+
+    void setWindow(GWindow*);
+
+    GWidget* parentWidget() { return static_cast<GWidget*>(parent()); }
+    const GWidget* parentWidget() const { return static_cast<const GWidget*>(parent()); }
+
+    void setFillWithBackgroundColor(bool b) { m_fillWithBackgroundColor = b; }
+    bool fillWithBackgroundColor() const { return m_fillWithBackgroundColor; }
+
+    const Font& font() const { return *m_font; }
+    void setFont(RetainPtr<Font>&&);
+
+    virtual GraphicsBitmap* backing();
+
+private:
+    GWindow* m_window { nullptr };
+
+    Rect m_relativeRect;
+    Color m_backgroundColor { 0xffffff };
+    Color m_foregroundColor { 0x000000 };
+    RetainPtr<Font> m_font;
+
+    bool m_hasPendingPaintEvent { false };
+    bool m_fillWithBackgroundColor { true };
+};