//////////////////////////////////////////////////////////////////////////////
//
// License Agreement:
//
// The following are Copyright © 2007, Casey Langen
//
// Sources and Binaries of: win32cpp
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//////////////////////////////////////////////////////////////////////////////

#pragma once

//////////////////////////////////////////////////////////////////////////////

#include <win32cpp/Win32Config.hpp>
#include <win32cpp/Panel.hpp>
#include <win32cpp/ILayout.hpp>
#include <win32cpp/Application.hpp>

namespace win32cpp {

//////////////////////////////////////////////////////////////////////////////

///\brief Specifies the orientation of a LinearLayout
enum LayoutOrientation
{
    VerticalLayout,    /*!< */
    HorizontalLayout   /*!< */
};

///\brief A Container that is used to stack controls horizontally or
///vertically.
///
///Children are added to and removed from a LinearLayout using
///Container::AddChild and Container::RemoveChild, respectively. The order
///in which the children are arranged is determined by the order in
///which they are added to the Container. First in, first out.
///
///The orientation (VerticalLayout or HorizontalLayout) is determined at
///construction time by specifying a win32cpp::LinearLayoutOrientation.
///
///If a child is resized, LinearLayout will adjust itself accordingly.
///
///\code
/// // create a new Horizontal LinearLayout with 4 buttons.
/// LinearLayout* layout = new LinearLayout(LinearColumnLayout);
/// layout->AddChild(new Button(_T("Prev")));
/// layout->AddChild(new Button(_T("Play")));
/// layout->AddChild(new Button(_T("Stop")));
/// layout->AddChild(new Button(_T("Next")));
///\endcode
///
///Children are positioned and sized according to their LayoutWidth(),
///LayoutHeight(), LayoutAlignment(), and LayoutWeight() properties.
///\endcode
class LinearLayout: public Panel, public ILayout
{
private: // types
    typedef Panel base;
    typedef std::map<Window*, Size> ChildSizeMap;

public: // constructors
    /*ctor*/    LinearLayout(
                    LayoutOrientation orientation,
                    LayoutFlags layoutFlags = LayoutWrapWrap);

public: // methods
    void SetSpacing(int spacing);
    int Spacing() const;

public: // ILayout
    virtual void Layout();

protected: // methods
    static bool RegisterWindowClass();
    virtual HWND Create(Window* parent);

    virtual void OnResized(const Size& newSize);
    void OnChildAdded(Window* newChild);
    void OnChildLayoutParametersChanged(Window* newChild);
    void OnChildRemoved(Window* oldChild);
    void OnChildResized(Window* window, Size newSize);
    void ThrowIfNotChild(Window* child);
    void ResizeWrapContent();
    Point AlignChildInRect(LayoutAlignFlag alignment, Size childSize, Rect alignmentRect);

private: // instance data
    LayoutOrientation orientation;
    int spacing;
    ChildSizeMap childSizeMap;
    bool childIsResizing, isResizing;
};

/////////////////////////////////////////////////////////////////////////////

}   // win32cpp
