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MenuOnButton.h

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// MenuOnButton.h
// Creates a button that pops-up a menu
//
// Author: Richard van Balen

#ifndef OglGui_MenuOnButton_h
#define OglGui_MenuOnButton_h

#ifndef OglGui_Button_h
#include "OglGui/Button.h"
#endif

#ifndef OglGui_Menu_h
#include "OglGui/Menu.h"
#endif

namespace OglGui {

class MenuOnButton :  public Button,
                      public ButtonListener
{
public:
    MenuOnButton(Window* parent, int x, int y, int w, int h, strconst label,
               Menu* menu=0) :
        Button(parent,x,y,w,h,label,BEV_ETCHED,true)
    {
        Init(menu,w,h);
    }

    MenuOnButton(Window* parent, int w, int h, strconst label, Menu* menu=0) :
        Button(parent,w,h,label,BEV_ETCHED,true)
    {
        Init(menu,w,h);
    }

    virtual void ButtonSelectionEvent(Button *src, void* userData)
    {
        if (!mMenu)
            return;
        int x = 0, y = 2;
        ToTopWindow(src,x,y);
        mMenu->Open(x,y);
        mActive = true;
    }

    void SetMenu(Menu* menu)            { mMenu = menu; }
    void ShowTriangle(bool mode=true)   { mShowTriangle = mode; }

    void ActiveBorderType(int type)
    {
        mNonActiveBorderType = GetBorderType();
        mActiveBorderType = type;
    }

    void ShowMenuTriangle()
    {
        OGC myOGC;
        OGCSave(&myOGC);

        float w = W(), hH = H()/2, coords[6];
        coords[0] = w  - (mActive ? 9 : 7);
        coords[1] = hH + (mActive ? 2 : 3);
        coords[2] = w  - 3;
        coords[3] = hH + (mActive ? 2 : 0);
        coords[4] = w  - (mActive ? 6 : 7);
        coords[5] = hH - (mActive ? 2 : 3);

        ULONG  col = GetState() ? 0xff505050 : oglLIGHTGREY;
        col = (GetState()==2 || mActive) ? oglBLACK : col;
        OGCSetPolyFillMode(theOGC,3);
        SetSolidFillColor(col);
        FillTriangles(coords,3);
        OGCRestore(&myOGC);
    }

    virtual void DisplayFunc()
    {
        mActive = (mActive && mMenu) ? mMenu->GetVisible() : false;
        if (mActiveBorderType != -2)
            SetBorderType(mActive ? mActiveBorderType : mNonActiveBorderType);
        Button::DisplayFunc();
        if (mShowTriangle)
            ShowMenuTriangle();
    }

    virtual void
    MouseFunc(int msg, int but, int state, int x, int y)
    {
        if (!GetState()) return;

        Button::MouseFunc( msg, but, state, x, y );

        if (msg == oglMouseEnter)
        {
            mNonActiveBg = GetBorderBackground();
            SetBorderBackground(mStateFeedbackColor);
        }
        if (msg == oglMouseLeave)
            SetBorderBackground(mNonActiveBg);
    }

private:
    Menu*   mMenu;
    ULONG   mNonActiveBg;
    int     mNonActiveBorderType;
    int     mActiveBorderType;
    bool    mActive;
    bool    mShowTriangle;

    void Init(Menu* menu, int w, int h)
    {
        mMenu = menu;
        mActive = false;
        mShowTriangle = true;
        mNonActiveBorderType = GetBorderType();
        mActiveBorderType = -2;   
        mDoStateFeedback = false; // We handle it as std behaviour went wrong
        SetButtonListener(this);
    }
};

} // Namespace OglGui
#endif

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