Set up stacked widget.

src/ui_elements/widgets/Widget.h

@@ -12,16 +12,35 @@
 
 class Widget
 {
-protected:
+public:
+    struct BoundaryOffset{
+        unsigned mLeft = 0;
+        unsigned mRight = 0;
+        unsigned mTop = 0;
+        unsigned mBottom = 0;
+    };
 
+    struct BoundedSize{
+        unsigned mWidth = 0;
+        unsigned mMaxWidth = 0;
+        unsigned mMinWidth = 0;
+        unsigned mHeight = 0;
+        unsigned mMaxHeight = 0;
+        unsigned mMinHeight = 0;
+    };
+
+protected:
     DiscretePoint mLocation;
-    unsigned mWidth;
-    unsigned mHeight;
-    unsigned mMaxHeight;
+    BoundedSize mSize;
+    BoundaryOffset mPadding;
+    BoundaryOffset mMargin;
     std::vector<VisualLayerUPtr> mMyLayers;
     std::vector<VisualLayer*> mLayers;
     std::vector<std::unique_ptr<Widget> > mChildren;
+    unsigned mBorderThickness;
     ColorUPtr mBackgroundColor;
+    ColorUPtr mBorderColor;
+    bool mVisible;
 
 public:
 
@@ -33,11 +52,7 @@ public:
 
     virtual void AddWidget(std::unique_ptr<Widget> widget);
 
-    unsigned GetWidth() const;
-
-    unsigned GetHeight() const;
-
-    unsigned GetMaxHeight() const;
+    BoundedSize GetSize() const;
 
     std::vector<VisualLayer*> GetLayers() const;
 
@@ -53,11 +68,21 @@ public:
 
     void SetBackgroundColor(ColorUPtr color);
 
-    void SetSize(unsigned mWidth, unsigned mHeight);
+    void SetBounds(unsigned width, unsigned height);
+
+    void SetSize(const BoundedSize& size);
+
+    void SetMargin(unsigned margin);
+
+    void SetMargin(const BoundaryOffset& margin);
+
+    void SetPadding(unsigned padding);
+
+    void SetPadding(const BoundaryOffset& padding);
 
     void SetLocation(const DiscretePoint& loc);
 
-    void SetMaxHeight(unsigned maxHeight);
+    void SetVisible(bool visible);
 
 protected: