$#include "ScrollView.h"

/// Scrollable %UI element for showing a (possibly large) child element.
class ScrollView : public UIElement
{
public:
    /// Construct.
    ScrollView(Context* context);
    /// Destruct.
    virtual ~ScrollView();
    /// Set content element.
    void SetContentElement(UIElement* element);
    /// Set view offset from the top-left corner.
    void SetViewPosition(const IntVector2& position);
    /// Set view offset from the top-left corner.
    void SetViewPosition(int x, int y);
    /// Set scrollbars' visibility manually. Disables scrollbar autoshow/hide.
    void SetScrollBarsVisible(bool horizontal, bool vertical);
    /// Set whether to automatically show/hide scrollbars. Default true.
    void SetScrollBarsAutoVisible(bool enable);
    /// Set arrow key scroll step. Also sets it on the scrollbars.
    void SetScrollStep(float step);
    /// Set arrow key page step.
    void SetPageStep(float step);

    /// Return view offset from the top-left corner.
    const IntVector2& GetViewPosition() const { return viewPosition_; }
    /// Return content element.
    UIElement* GetContentElement() const { return contentElement_; }
    /// Return horizontal scroll bar.
    ScrollBar* GetHorizontalScrollBar() const { return horizontalScrollBar_; }
    /// Return vertical scroll bar.
    ScrollBar* GetVerticalScrollBar() const { return verticalScrollBar_; }
    /// Return scroll panel.
    BorderImage* GetScrollPanel() const { return scrollPanel_; }
    /// Return whether scrollbars are automatically shown/hidden.
    bool GetScrollBarsAutoVisible() const { return scrollBarsAutoVisible_; }
    /// Return arrow key scroll step.
    float GetScrollStep() const;
    /// Return arrow key page step.
    float GetPageStep() const { return pageStep_; }

    /// Set view position attribute.
    void SetViewPositionAttr(const IntVector2& value);
};