TabControl.h

/*
AWind.h - Arduino window library support for Color TFT LCD Boards
Copyright (C)2015 Andrei Degtiarev. All right reserved


You can always find the latest version of the library at
https://github.com/AndreiDegtiarev/AWind


This library is free software; you can redistribute it and/or
modify it under the terms of the CC BY-NC-SA 3.0 license.
Please see the included documents for further information.

Commercial use of this library requires you to buy a license that
will allow commercial use. This includes using the library,
modified or not, as a tool to sell products.

The license applies to all part of the library including the
examples and tools supplied with the library.
*/
#pragma once
#include "MainWindow.h"
#include "Button.h"

class TabControl : public Window, public ITouchEventReceiver
{
    LinkedList<Button> _listButtons; //list of buttons on the left scrren side
    LinkedList<Window> _listWindow;          //list of depended windows (
    static const int _szy = 30;
public:

    TabControl(const __FlashStringHelper * name, int left, int top, int width, int height):Window(name, left, top, width, height)
    {
        SetDecorators(Environment::Get()->FindDecorators(F("TabControl")));
        AddChild(new Window(F("Back tab buttons"), 0, 0, width, _szy));
        Children()[0]->SetDecorators(Environment::Get()->FindDecorators(F("BackTabButtons")));
    }
    void AddTab(const __FlashStringHelper *buttonName,Window *window)
    {
        int wnd_width=Width();
        int wnd_height=Height();
        int x=0;
        int y=0;
        Button * button=new Button(0,0,0,0,buttonName);
        button->SetMargins(5,7);
        button->RegisterTouchEventReceiver(this);
        Children()[0]->AddChild(button);
        AddChild(window);
        window->Move(1, _szy+1, wnd_width-2,wnd_height - _szy-2);
        _listButtons.Add(button);
        _listWindow.Add(window);
        if(_listWindow.Count()>1)
            window->SetVisible(false);
        else
            _listButtons[0]->SetDecorators(Environment::Get()->FindDecorators(F("ActiveTabButton")));
        UpdateTabs(0);
    }
    void UpdateTabs(int sel_index)
    {
        int szx = Width() / _listButtons.Count();

        for (int i = 0;i < _listButtons.Count();i++)
        {
            int offset_y = i == sel_index ? 0 : 3;
            _listButtons[i]->Move(0 + szx*i, offset_y, szx - 1, _szy- offset_y);
        }
        Children()[0]->Invalidate();
    }
    void NotifyTouch(Window *window)
    {
        int sel_index=-1;
        for(int i=0;i<_listButtons.Count();i++)
        {
            if(window == _listButtons[i])
            {
                sel_index=i;
                break;
            }
        }
        if(sel_index >=0)
        {
            UpdateTabs(sel_index);
            DecoratorList *buttonDeco=Environment::Get()->FindDecorators(F("Button"));
            for(int i=0;i<_listButtons.Count();i++)
            {
                _listWindow[i]->SetVisible(i==sel_index);
                if(i==sel_index)
                {
                    _listWindow[i]->Invalidate();
                    _listButtons[i]->SetDecorators(Environment::Get()->FindDecorators(F("ActiveTabButton")));
                }
                else
                {
                    if(_listButtons[i]->GetDecorators()!=buttonDeco)
                    {
                        _listButtons[i]->SetDecorators(buttonDeco);
                        //_listButtons[i]->Invalidate();
                    }
                }
            }
        }
        //out<<F("Window selected: ")<<sel_index<<endl;
    }
};