File content as of revision 8:a0d75dff3c9b:

/*******************************************************************************
* Copyright (C) 2017 Maxim Integrated Products, Inc., All Rights Reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included
* in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
* IN NO EVENT SHALL MAXIM INTEGRATED BE LIABLE FOR ANY CLAIM, DAMAGES
* OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
* OTHER DEALINGS IN THE SOFTWARE.
*
* Except as contained in this notice, the name of Maxim Integrated
* Products, Inc. shall not be used except as stated in the Maxim Integrated
* Products, Inc. Branding Policy.
*
* The mere transfer of this software does not imply any licenses
* of trade secrets, proprietary technology, copyrights, patents,
* trademarks, maskwork rights, or any other form of intellectual
* property whatsoever. Maxim Integrated Products, Inc. retains all
* ownership rights.
*******************************************************************************/

#include <algorithm>
#include <functional>
#include "Bitmap.hpp"
#include "Display.hpp"
#include "WindowManager.hpp"

static void deleteWindow(Window * window)
{
    delete window;
}

WindowManager::~WindowManager()
{
    // Free all windows.
    std::for_each(m_windowStack.begin(), m_windowStack.end(), deleteWindow);
    std::for_each(m_actionQueue.begin(), m_actionQueue.end(), deleteWindow);
}

void WindowManager::processAction(Window * window)
{
    if (window == NULL)
    {
        if (!m_windowStack.empty())
        {
            delete m_windowStack.back();
            m_windowStack.pop_back();
        }
    }
    else
    {
        m_windowStack.push_back(window);
    }
}

void WindowManager::push(std::auto_ptr<Window> & window)
{
    if (window.get() != NULL)
    {
        window->resize(Display::width, Display::height);
        window->move(0, 0);
        window->setWindowManager(NULL);
        m_actionQueue.push_back(window.release());
    }
}

void WindowManager::pop()
{
    m_actionQueue.push_back(NULL);
}

void WindowManager::update(Display & display)
{
    // Perform all queued push / pop actions.
    if (!m_actionQueue.empty())
    {
        if (!m_windowStack.empty())
        {
            m_windowStack.back()->setWindowManager(NULL);
        }
        std::for_each(m_actionQueue.begin(), m_actionQueue.end(),
            std::bind1st(std::mem_fun(&WindowManager::processAction), this));
        m_actionQueue.clear();
        if (m_windowStack.empty())
        {
            // Clear the display.
            display.update(Bitmap(Display::width, Display::height));
        }
        else
        {
            m_windowStack.back()->setWindowManager(this);
            // Window has been invalidated and will be redrawn in the next section.
        }
    }
    
    if (!m_windowStack.empty())
    {
        // Update all windows. Only allow redraw of the top window.
        for (std::vector<Window *>::reverse_iterator it = m_windowStack.rbegin(); it != m_windowStack.rend(); it++)
        {
            (*it)->update(it == m_windowStack.rbegin() ? &display : NULL);
        }
    }
}

void WindowManager::processKey(Key key)
{
    if (!m_windowStack.empty())
    {
        m_windowStack.back()->processKey(key);
    }
}