window.cpp

FreeAMP(MP3播放)程序源代码-用来研究MP3解码

/*____________________________________________________________________________

   FreeAmp - The Free MP3 Player

   Copyright (C) 1999-2000 EMusic

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 2 of the License, or
   (at your option) any later version.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software
   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.

   $Id: Window.cpp,v 1.52 2000/11/08 16:27:02 robert Exp $
____________________________________________________________________________*/ 

// The debugger can't handle symbols more than 255 characters long.
// STL often creates symbols longer than that.
// When symbols are longer than 255 characters, the warning is disabled.
#ifdef WIN32
#pragma warning(disable:4786) 
#endif

#include <stdio.h>
#include <algorithm>
#include "Window.h"
#include "Theme.h"
#include "debug.h"

#define DB Debug_v("%s:%d\n", __FILE__, __LINE__);

const int iDesktopSnapAmount = 10;

Window::Window(Theme *pTheme, string &oName)
{
    m_oName = oName;
    m_bExit = false;
    m_pTheme = pTheme;
    m_bWindowMove = false;
    m_bLButtonDown = false;
    m_bStayOnTop = false;
    m_bLiveInToolbar = false;
    m_bIsDockWindow = false;

    m_pCanvas = NULL;
    m_pMouseInControl = NULL;
    m_pCaptureControl = NULL;
    m_pMouseDownControl = NULL;
    m_bIsVulcanMindMeldHost = false;
    m_bMindMeldInProgress = false;    
    m_bNoOutsideMessages = false;

    m_pUsageMutex = new Mutex();
    m_pUsageSem = new Semaphore();
    m_iUsageCount = 0;
}

Window::~Window(void)
{
    vector<Panel *>::iterator i;

    if (!m_bIsVulcanMindMeldHost)
    {
       delete m_pCanvas;
       ClearControls();

       for(i = m_oPanels.begin(); i != m_oPanels.end(); i++)
	     	delete (Panel *)*i;
    }   

    delete m_pUsageMutex;
    delete m_pUsageSem;

}

void Window::IncUsageRef(void)
{
    for(;;)
    {
        m_pUsageMutex->Acquire();
    
        if (m_iUsageCount < 0)
        {
            m_pUsageMutex->Release();
            m_pUsageSem->Wait();
        }
        else
            break;
    }    
       
    m_iUsageCount++;
    
    m_pUsageMutex->Release();
}

void Window::DecUsageRef(void)
{
    m_pUsageMutex->Acquire();
    m_iUsageCount--;
    m_pUsageSem->Signal(); 
    m_pUsageMutex->Release();
}

void Window::LockUsageRef(void)
{
    for(;;)
    {
        m_pUsageMutex->Acquire();
    
        if (m_iUsageCount > 0)
        {
            m_pUsageMutex->Release();
            ProcessWaitingMessages();
            m_pUsageSem->Wait();
        }
        else
            break;
    }    
    m_iUsageCount = -1;
    m_pUsageMutex->Release();
}

void Window::UnlockUsageRef(void)
{
    m_pUsageMutex->Acquire();
    m_iUsageCount = 0;
    m_pUsageSem->Signal(); 
    m_pUsageMutex->Release();
}

void Window::VulcanMindMeldHost(bool bHost)
{
    m_bIsVulcanMindMeldHost = bHost;
    
    if (bHost)
    {
       delete m_pCanvas;
       m_pCanvas = NULL;
    }
}

Error Window::VulcanMindMeld(Window *pOther)
{
    vector<Panel *>::iterator   k;
    string                      oName;

    LockUsageRef();
    m_bNoOutsideMessages = true;

    m_oName = pOther->m_oName;
    m_pTheme = pOther->m_pTheme;

    m_bWindowMove = pOther->m_bWindowMove;
    m_bStayOnTop = pOther->m_bLiveInToolbar;
    m_bIsDockWindow = pOther->m_bIsDockWindow;
    m_oDockPos = pOther->m_oDockPos;

    m_pMouseInControl = NULL;
    m_pCaptureControl = NULL;
    m_pMouseDownControl = NULL;

    m_oPanels.clear();
    for(k = pOther->m_oPanels.begin(); k != pOther->m_oPanels.end(); k++)
    {
        (*k)->SetParentWindow(this);
        m_oPanels.push_back(*k);
    }    

    m_pCanvas = pOther->m_pCanvas;

    UnlockUsageRef();

    Init();   

    m_bNoOutsideMessages = false;

    return kError_NoErr;
}

void Window::Init(void)
{
    vector<Panel *>::iterator i;

    IncUsageRef();

    m_pCanvas->InitBackgrounds(&m_oPanels);
    m_pCanvas->Init();

    for(i = m_oPanels.begin(); i != m_oPanels.end(); i++)
        (*i)->Init();
        
    m_pTheme->InitControls();    
    
    DecUsageRef();
}

void Window::AddPanel(Panel *pPanel)
{
    string oName;

    IncUsageRef();
    m_oPanels.push_back(pPanel);
    DecUsageRef();
}

void Window::PanelStateChanged(void)
{
    vector<Panel *>::iterator i;
    Rect oRect, oWindowRect;

    IncUsageRef();
    m_pCanvas->InitBackgrounds(&m_oPanels);
    m_pCanvas->Init();
    for(i = m_oPanels.begin(); i != m_oPanels.end(); i++)
        (*i)->ShowAllControls();

    GetWindowPosition(oWindowRect);
    m_pCanvas->GetBackgroundRect(oRect);
    oWindowRect.x2 = oWindowRect.x1 + oRect.Width();
    oWindowRect.y2 = oWindowRect.y1 + oRect.Height();
    SetWindowPosition(oWindowRect);

    m_pCanvas->Invalidate(oRect);

    DecUsageRef();
}

void Window::ClearControls(void)
{
    vector<Panel *>::iterator i;

    IncUsageRef();
       
    for(i = m_oPanels.begin(); i != m_oPanels.end(); i++)
        (*i)->ClearControls();

    DecUsageRef();
}

Canvas *Window::GetCanvas(void)
{
    return m_pCanvas;
}

void Window::GetName(string &oName)
{
    oName = m_oName;
}

void Window::SetDockPosition(Pos &oPos)
{
    m_oDockPos = oPos;
    m_bIsDockWindow = true;
}

Error Window::ControlEnable(const string &oTarget, bool bSet, bool &bEnable)
{
    vector<Panel *>::iterator i;

    IncUsageRef();
       
    for(i = m_oPanels.begin(); i != m_oPanels.end(); i++)
        (*i)->ControlEnable(oTarget, bSet, bEnable);

    DecUsageRef();

    return kError_NoErr;
}

Error Window::ControlShow(const string &oTarget, bool bSet, bool &bShow)
{
    vector<Panel *>::iterator i;

    IncUsageRef();

    for(i = m_oPanels.begin(); i != m_oPanels.end(); i++)
        (*i)->ControlShow(oTarget, bSet, bShow);

    DecUsageRef();

    return kError_NoErr;
}

Error Window::ControlIntValue(const string &oTarget, bool bSet, int &iValue)
{
    vector<Panel *>::iterator i;

    IncUsageRef();

    for(i = m_oPanels.begin(); i != m_oPanels.end(); i++)
        (*i)->ControlIntValue(oTarget, bSet, iValue);
       
    DecUsageRef();

    return kError_NoErr;
}

Error Window::ControlStringValue(const string &oTarget, bool bSet, string &oValue)
{
    vector<Panel *>::iterator i;

    IncUsageRef();
       
    for(i = m_oPanels.begin(); i != m_oPanels.end(); i++)
        (*i)->ControlStringValue(oTarget, bSet, oValue);

    DecUsageRef();

    return kError_NoErr;
}

Error Window::ControlGetDesc(const string &oTarget, string &oDesc)
{
    vector<Panel *>::iterator i;

    IncUsageRef();
       
    for(i = m_oPanels.begin(); i != m_oPanels.end(); i++)
        (*i)->ControlGetDesc(oTarget, oDesc);

    DecUsageRef();

    return kError_InvalidParam;
}

Error Window::ControlGetTip(const string &oTarget, string &oTip)
{
    vector<Panel *>::iterator i;

    IncUsageRef();
       
    for(i = m_oPanels.begin(); i != m_oPanels.end(); i++)
        (*i)->ControlGetTip(oTarget, oTip);

    DecUsageRef();

    return kError_InvalidParam;
}

Error Window::SendControlMessage(Control *pControl, 
                                 ControlMessageEnum eMesg)
{
    string oControlName;
    Error  eRet;

    IncUsageRef();

    pControl->GetName(oControlName);

    eRet = m_pTheme->HandleControlMessage(oControlName, eMesg);
    DecUsageRef();
    
    return eRet;
}

bool Window::DoesControlExist(const string &oName)
{
    bool bRet = false;
    vector<Panel *>::iterator i;

    IncUsageRef();
    for(i = m_oPanels.begin(); i != m_oPanels.end() && !bRet; i++)
    {
        bRet = (*i)->DoesControlExist(oName);
    }
    DecUsageRef();
    
    return bRet;
}

Control *Window::ControlFromPos(Pos &oPos)
{
    vector<Panel *>::iterator   i;
    Control                    *pControl = NULL;

    IncUsageRef();
    
    for(i = m_oPanels.begin(); i != m_oPanels.end() && !pControl; i++)
    {
        pControl = (*i)->ControlFromPos(oPos);
    }
    DecUsageRef();

    return pControl;
}

void Window::GetControlToolTips(vector<pair<Rect, string> > &oList)
{
    vector<Panel *>::iterator   i;

    IncUsageRef();
	oList.clear();
    for(i = m_oPanels.begin(); i != m_oPanels.end(); i++)
    {
        (*i)->GetControlToolTips(oList);
    }
    DecUsageRef();
}	 

Error Window::StartMouseCapture(Control *pControl)
{
    IncUsageRef();
    m_pCaptureControl = pControl;
    DecUsageRef();
    
    return CaptureMouse(true);
}

Error Window::EndMouseCapture(void)
{
    IncUsageRef();
    m_pCaptureControl = NULL;
    DecUsageRef();
    
    return CaptureMouse(false);