window.cpp

freeamp有名的媒体播放器

/*____________________________________________________________________________

   FreeAmp - The Free MP3 Player

   Copyright (C) 1999 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 1.29.2.2.6.1 2000/04/09 15:56:41 ijr 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_pCanvas = NULL;
    m_pMouseInControl = NULL;
    m_pCaptureControl = NULL;
    m_pMouseDownControl = NULL;
    m_bIsVulcanMindMeldHost = false;
    m_bMindMeldInProgress = false;
    
	m_pUsageMutex = new Mutex();
	m_pUsageSem = new Semaphore();
	m_iUsageCount = 0;
}

Window::~Window(void)
{
    if (!m_bIsVulcanMindMeldHost)
    {
       delete m_pCanvas;
       ClearControls();
    }   

	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<Control *>::iterator i;
    ControlMapIterator          j;
    string                      oName;

    LockUsageRef();

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

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

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

    m_oControls.clear();
    for(i = pOther->m_oControls.begin(); i != pOther->m_oControls.end(); i++)
    {
        m_oControls.push_back(*i);
    }    

    m_oControlMap.clear();
    for(j = pOther->m_oControlMap.begin(); j != pOther->m_oControlMap.end(); j++)
        m_oControlMap.insert(pair<string, Control *>((*j).first, (*j).second));
        
    m_pCanvas = pOther->m_pCanvas;

    UnlockUsageRef();
    
    Init();   
   
    return kError_NoErr;
}

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

    IncUsageRef();

    m_pCanvas->Init();

    for(i = m_oControls.begin(); i != m_oControls.end(); i++)
    {
        (*i)->SetParent(this);
        (*i)->Init();
    }    
        
    m_pTheme->InitControls();    
    
    DecUsageRef();
}

void Window::AddControl(Control *pControl)
{
    string oName;

    IncUsageRef();

    pControl->GetName(oName);
    m_oControlMap.insert(pair<string, Control *>(oName, pControl));
    m_oControls.push_back(pControl);

    DecUsageRef();
}

void Window::ClearControls(void)
{
    IncUsageRef();
       
    while(m_oControls.size() > 0)
    {
        delete m_oControls[0];
        m_oControls.erase(m_oControls.begin());
    }
    m_oControlMap.clear();

    DecUsageRef();
}

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

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

Error Window::ControlEnable(const string &oTarget, bool bSet, bool &bEnable)
{
    ControlMapIterator i;

    IncUsageRef();
       
    pair<ControlMapIterator, ControlMapIterator> keyRange
        = m_oControlMap.equal_range(oTarget);

    for (i = keyRange.first; i != keyRange.second; i++)
    {
        i->second->Enable(bSet, bEnable);
    }

    DecUsageRef();

    return kError_NoErr;
}

Error Window::ControlShow(const string &oTarget, bool bSet, bool &bShow)
{
    Pos                 oPos;
    Rect                oRect;
    Error               eRet;
    Control            *pControl;
    ControlMapIterator  i;

    IncUsageRef();

    pair<ControlMapIterator, ControlMapIterator> keyRange
        = m_oControlMap.equal_range(oTarget);

    for (i = keyRange.first; i != keyRange.second; i++)
    {
        pControl = i->second;
        
        eRet = pControl->Show(bSet, bShow);

        GetMousePos(oPos);
        GetWindowPosition(oRect);
        oPos.x -= oRect.x1;
        oPos.y -= oRect.y1;
        if (bSet && bShow && pControl->PosInControl(oPos))
    	    pControl->AcceptTransition(CT_MouseEnter);
    }        

    DecUsageRef();

    return kError_NoErr;
}

Error Window::ControlIntValue(const string &oTarget, bool bSet, int &iValue)
{
    ControlMapIterator  i;

    IncUsageRef();
       
    pair<ControlMapIterator, ControlMapIterator> keyRange
        = m_oControlMap.equal_range(oTarget);

    for (i = keyRange.first; i != keyRange.second; i++)
    {
         i->second->IntValue(bSet, iValue);
    }        

    DecUsageRef();

    return kError_NoErr;
}

Error Window::ControlStringValue(const string &oTarget, bool bSet, string &oValue)
{
    ControlMapIterator  i;

    IncUsageRef();
       
    pair<ControlMapIterator, ControlMapIterator> keyRange
        = m_oControlMap.equal_range(oTarget);

    for (i = keyRange.first; i != keyRange.second; i++)
    {
        i->second->StringValue(bSet, oValue);
    }        

    DecUsageRef();

    return kError_NoErr;
}

Error Window::ControlGetDesc(const string &oTarget, string &oDesc)
{
    ControlMapIterator  i;

    IncUsageRef();
       
    pair<ControlMapIterator, ControlMapIterator> keyRange
        = m_oControlMap.equal_range(oTarget);

    for (i = keyRange.first; i != keyRange.second; i++)
    {
         i->second->GetDesc(oDesc);
         DecUsageRef();
         return kError_NoErr;
    }        

    DecUsageRef();

    return kError_InvalidParam;
}

Error Window::ControlGetTip(const string &oTarget, string &oTip)
{
    ControlMapIterator  i;

    IncUsageRef();
       
    pair<ControlMapIterator, ControlMapIterator> keyRange
        = m_oControlMap.equal_range(oTarget);

    for (i = keyRange.first; i != keyRange.second; i++)
    {
         i->second->GetTip(oTip);
         DecUsageRef();
         return kError_NoErr;
    }        

    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;

    IncUsageRef();
    bRet = m_oControlMap.find(oName) != m_oControlMap.end();
    DecUsageRef();
    
    return bRet;
}

Control *Window::ControlFromPos(Pos &oPos)
{
    vector<Control *>::iterator i;
    bool                        bShown;
    Control                    *pControl;

    IncUsageRef();
    
    for(i = m_oControls.begin(); i != m_oControls.end(); i++)
    {
        (*i)->Show(false, bShown);
        if ((*i)->PosInControl(oPos) && bShown) 
        {
            pControl = (*i);