gtkwindow.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 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: GTKWindow.cpp,v 1.38 2001/01/04 09:11:36 robert Exp $
____________________________________________________________________________*/ 

#include <stdio.h>
#include <unistd.h>
#include "facontext.h"
#include "errors.h"
#include "Theme.h"
#include "GTKWindow.h"
#include "GTKCanvas.h"
#include "GTKUtility.h" 

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

static GtkTargetEntry main_drop[] =
{
    { "text/plain", 0, 1 },
    { "text/html", 0, 1 }
};

void mouse_move(GtkWidget *w, GdkEvent *e, GTKWindow *ui)
{
    Pos oPos;

    oPos.x = (int)e->motion.x_root;
    oPos.y = (int)e->motion.y_root;
    gdk_threads_leave();
    ui->m_pMindMeldMutex->Acquire();
    ui->HandleMouseMove(oPos);
    ui->m_pMindMeldMutex->Release();
    gdk_threads_enter();
}

void button_down(GtkWidget *w, GdkEvent *e, GTKWindow *ui)
{
    Pos oPos;
    oPos.x = (int)e->button.x_root;
    oPos.y = (int)e->button.y_root;
    gdk_threads_leave();
    ui->m_pMindMeldMutex->Acquire();
    if (e->button.button == 1) 
    {
        if (e->type==GDK_2BUTTON_PRESS)
            ui->HandleMouseLButtonDoubleClick(oPos);
        else
            ui->HandleMouseLButtonDown(oPos);
    }
    else
    if (e->button.button == 3)
    {
        ui->BringWindowToFront();
    }
    else
    if (e->button.button == 4) 
    {
        ui->HandleMouseWheelChange(1);
    }
    else
    if (e->button.button == 5) 
    {
        ui->HandleMouseWheelChange(-1);
    }
    
    ui->m_pMindMeldMutex->Release();
    gdk_threads_enter();
}

void button_up(GtkWidget *w, GdkEvent *e, GTKWindow *ui)
{
    Pos oPos;
    oPos.x = (int)e->button.x_root;
    oPos.y = (int)e->button.y_root;
    gdk_threads_leave();
    ui->m_pMindMeldMutex->Acquire();
    if (e->button.button == 1)
        ui->HandleMouseLButtonUp(oPos);
    ui->m_pMindMeldMutex->Release();
    gdk_threads_enter();
}

void key_press(GtkWidget *w, GdkEvent *e, GTKWindow *ui)
{
    char *str = e->key.string;
    gdk_threads_leave();
    ui->m_pMindMeldMutex->Acquire();
    ui->Keystroke(str[0]);
    ui->m_pMindMeldMutex->Release();
    gdk_threads_enter();
}

void enter_notify(GtkWidget *w, GdkEventCrossing *e, GTKWindow *ui)
{
    gdk_threads_leave();
    ui->m_pMindMeldMutex->Acquire();
    ui->SetMouseIn();
    ui->m_pMindMeldMutex->Release();
    gdk_threads_enter();
}

void leave_notify(GtkWidget *w, GdkEventCrossing *e, GTKWindow *ui)
{
    gdk_threads_leave();
    ui->m_pMindMeldMutex->Acquire();
    ui->SetMouseOut();
    ui->m_pMindMeldMutex->Release();
    gdk_threads_enter();
}

void drop_file(GtkWidget *w, GdkDragContext *context, gint x, gint y,
               GtkSelectionData *data, guint info, guint time, 
               GTKWindow *ui)
{
    gdk_threads_leave();
    ui->SetMouseIn();
    if (data->data) {
        ui->DropFiles((char *)data->data);
    }
    gdk_threads_enter();
}
      
static gint do_timeout(void *p)
{
    GTKWindow *ui = (GTKWindow *)p;

    ui->m_pMindMeldMutex->Acquire();
    ui->TimerEvent();
    ui->DockCheck();
    ui->m_pMindMeldMutex->Release();
    
    return TRUE;
}

GTKWindow::GTKWindow(Theme *pTheme, string &oName)
          :Window(pTheme, oName)
{
    m_pCanvas = new GTKCanvas(this);
    m_pMindMeldMutex = new Mutex();

    lastDockPos.x = -1;
    lastDockPos.y = -1;

    gdk_threads_enter();
    mainWindow = gtk_window_new(GTK_WINDOW_TOPLEVEL);
    gtk_widget_set_app_paintable(mainWindow, TRUE);
    gtk_window_set_title(GTK_WINDOW(mainWindow), BRANDING);
    gtk_window_set_policy(GTK_WINDOW(mainWindow), TRUE, TRUE, TRUE);
    gtk_widget_set_events(mainWindow, GDK_SUBSTRUCTURE_MASK | GDK_STRUCTURE_MASK
                          | GDK_POINTER_MOTION_MASK | GDK_BUTTON_MOTION_MASK |
                          GDK_BUTTON_PRESS_MASK | GDK_BUTTON_RELEASE_MASK |
                          GDK_KEY_PRESS_MASK); 
    gtk_widget_realize(mainWindow);
    gdk_window_set_decorations(mainWindow->window, (GdkWMDecoration)0);
    gdk_threads_leave();

    initialized = false;
    m_bMouseInWindow = false;
}

GTKWindow::~GTKWindow(void)
{
    delete m_pMindMeldMutex;
}

Error GTKWindow::Run(Pos &oPos)
{
    Rect oRect;
    int iMaxX, iMaxY;

    m_oWindowPos = oPos;
    m_pCanvas->Init();

    GetCanvas()->GetBackgroundRect(oRect);

    gdk_threads_enter();

    gtk_signal_connect(GTK_OBJECT(mainWindow), "motion_notify_event",
                       GTK_SIGNAL_FUNC(mouse_move), this);
    gtk_signal_connect(GTK_OBJECT(mainWindow), "button_press_event",
                       GTK_SIGNAL_FUNC(button_down), this);
    gtk_signal_connect(GTK_OBJECT(mainWindow), "button_release_event",
                       GTK_SIGNAL_FUNC(button_up), this);
    gtk_signal_connect(GTK_OBJECT(mainWindow), "key_press_event",
                       GTK_SIGNAL_FUNC(key_press), this);
    gtk_drag_dest_set(mainWindow, GTK_DEST_DEFAULT_ALL, main_drop, 2,
                      GDK_ACTION_COPY);
    gtk_signal_connect(GTK_OBJECT(mainWindow), "drag_data_received",
                       GTK_SIGNAL_FUNC(drop_file), this);
    gtk_signal_connect(GTK_OBJECT(mainWindow), "enter_notify_event",
                       GTK_SIGNAL_FUNC(enter_notify), this);
    gtk_signal_connect(GTK_OBJECT(mainWindow), "leave_notify_event",
                       GTK_SIGNAL_FUNC(leave_notify), this);

    iMaxX = gdk_screen_width();
    iMaxY = gdk_screen_height();
 
    if (m_oWindowPos.x > iMaxX || m_oWindowPos.x + oRect.Width() < 0)
       m_oWindowPos.x = 0;
    if (m_oWindowPos.y > iMaxY || m_oWindowPos.y + oRect.Height() < 0)
       m_oWindowPos.y = 0;

    if (m_oWindowPos.x == -1 && m_oWindowPos.y == -1) {
        m_oWindowPos.x = (iMaxX - oRect.Width()) / 2;
        m_oWindowPos.y = (iMaxY - oRect.Height()) / 2;
    }

    gtk_widget_set_uposition(mainWindow, m_oWindowPos.x, m_oWindowPos.y);
    gtk_widget_set_usize(mainWindow, oRect.Width(), oRect.Height());
    gdk_threads_leave();

    Init();
    GdkBitmap *mask = ((GTKCanvas *)m_pCanvas)->GetMask();

    gdk_threads_enter();
    if (mask)
        gdk_window_shape_combine_mask(mainWindow->window, mask, 0, 0);
    gdk_threads_leave();

    ((GTKCanvas *)GetCanvas())->Paint(oRect);

    gdk_threads_enter();
    gtk_widget_show(mainWindow);
    gdk_flush(); 
    gtkTimer = gtk_timeout_add(250, do_timeout, this);
    gdk_threads_leave();
 
    initialized = true;

    quitLoop = false;
    while (!quitLoop) 
       sleep(1);

    oPos = m_oWindowPos;

    return kError_NoErr;
}

Error GTKWindow::VulcanMindMeld(Window *pOther)
{
    Error eRet;
    Rect  oRect;

    m_pMindMeldMutex->Acquire();

    gdk_threads_enter();
    gdk_flush();
    gdk_threads_leave();

    oRect.x1 = oRect.x2 = oRect.y1 = oRect.y2 = 0;
    GetWindowPosition(oRect);

    eRet = Window::VulcanMindMeld(pOther);

    if (IsError(eRet)) {
        m_pMindMeldMutex->Release();
        return eRet;
    }

    Rect oNewRect, oSize;
    
    m_pCanvas->GetBackgroundRect(oSize);
    GdkBitmap *mask = ((GTKCanvas *)m_pCanvas)->GetMask();

    GetReloadWindowPos(oRect, oSize.Width(), oSize.Height(), oNewRect);

    gdk_threads_enter();
    gtk_widget_set_uposition(mainWindow, oNewRect.x1, oNewRect.y1);
    gtk_widget_set_usize(mainWindow, oNewRect.Width(), oNewRect.Height());
    if (mask)
        gdk_window_shape_combine_mask(mainWindow->window, mask, 0, 0);
    gdk_threads_leave();

    Pos NewPos;
    NewPos.x = oNewRect.x1;
    NewPos.y = oNewRect.y1;

    SaveWindowPos(NewPos);

    ((GTKCanvas *)m_pCanvas)->SetParent(this);
    m_pCanvas->Update();
 
    m_pMindMeldMutex->Release();

    return kError_NoErr;
}

void GTKWindow::PanelStateChanged(void)
{
    Rect       oRect;
    GdkBitmap *mask;

    GetCanvas()->SetNoScreenUpdate(true);

    Window::PanelStateChanged();

    GetCanvas()->GetBackgroundRect(oRect);
    mask = ((GTKCanvas *)m_pCanvas)->GetMask();

    gdk_threads_enter();
    if (mask)
        gdk_window_shape_combine_mask(mainWindow->window, mask, 0, 0);
    gtk_widget_set_usize(mainWindow, oRect.Width(), oRect.Height());
    gdk_threads_leave();

    GetCanvas()->SetNoScreenUpdate(false);

    ((GTKCanvas *)GetCanvas())->Paint(oRect);
}

void GTKWindow::SaveWindowPos(Pos &oPos)
{
    m_oWindowPos = oPos;
}

Error GTKWindow::Close(void)
{
    Rect oRect;
    Pos oPos;
   
    if (quitLoop)
        return kError_NoErr;

    GetWindowPosition(oRect);
    oPos.x = oRect.x1;
    oPos.y = oRect.y1;
    SaveWindowPos(oPos);

    gdk_threads_enter();
    gtk_timeout_remove(gtkTimer);
    gtk_widget_destroy(mainWindow);
    gdk_flush();
    gdk_threads_leave();

    quitLoop = true;
    return kError_NoErr;
}

Error GTKWindow::Enable(void)
{
    return kError_NoErr;
}

Error GTKWindow::Disable(void)
{
    return kError_NoErr;
}

Error GTKWindow::Show(void)
{
    gdk_threads_enter();
    gtk_widget_show(mainWindow);
    gdk_threads_leave();
    return kError_NoErr;
}

Error GTKWindow::Hide(void)
{
    gdk_threads_enter();
    gtk_widget_hide(mainWindow);
    gdk_threads_leave();
    return kError_NoErr;
}

Error GTKWindow::SetTitle(string &oTitle)
{
    gdk_threads_enter();
    gtk_window_set_title(GTK_WINDOW(mainWindow), oTitle.c_str());
    gdk_threads_leave();
    return kError_NoErr;
}

Error GTKWindow::CaptureMouse(bool bCapture)
{
    gdk_threads_enter();
    if (bCapture)
        gdk_pointer_grab(mainWindow->window, FALSE, (GdkEventMask)
                         (GDK_SUBSTRUCTURE_MASK | GDK_STRUCTURE_MASK | 
                          GDK_POINTER_MOTION_MASK | GDK_BUTTON_MOTION_MASK | 
                          GDK_BUTTON_PRESS_MASK | GDK_BUTTON_RELEASE_MASK), 
                          mainWindow->window, NULL, 0);
    else 
        gdk_pointer_ungrab(0);
    gdk_threads_leave();
    return kError_NoErr;
}

Error GTKWindow::HideMouse(bool bHide)
{
    return kError_NoErr;
}

Error GTKWindow::SetMousePos(Pos &oPos)
{
    gdk_threads_enter();
    WarpPointer(mainWindow->window, oPos.x, oPos.y);
    gdk_threads_leave();
    return kError_NoErr;
}

Error GTKWindow::GetMousePos(Pos &oPos)
{
    if (initialized) {
        gdk_threads_enter();
        gtk_widget_get_pointer(mainWindow, &oPos.x, &oPos.y);
        gdk_threads_leave();
    }
    return kError_NoErr;
}

Error GTKWindow::SetWindowPosition(Rect &oWindowRect)
{
    gdk_threads_enter();
    gdk_window_move(mainWindow->window, oWindowRect.x1, oWindowRect.y1);
    gdk_threads_leave();
    return kError_NoErr;
}

Error GTKWindow::GetWindowPosition(Rect &oWindowRect) 
{
    if (!mainWindow->window)
        return kError_NoErr;
    gdk_threads_enter();
    gdk_window_get_position(mainWindow->window, &oWindowRect.x1, 
                            &oWindowRect.y1);
    gdk_threads_leave();

    Rect oRect;

    if (GetCanvas()) {
        GetCanvas()->GetBackgroundRect(oRect);
   
        oWindowRect.x2 = oWindowRect.x1 + oRect.Width();
        oWindowRect.y2 = oWindowRect.y1 + oRect.Height();
    }
    else {
        oWindowRect.x2 = oWindowRect.x1;
        oWindowRect.y2 = oWindowRect.y1;
    }

    return kError_NoErr;
}

Error GTKWindow::Minimize(void)
{
    gdk_threads_enter();
    IconifyWindow(mainWindow->window);
    gdk_threads_leave();
    return kError_NoErr;
}

Error GTKWindow::Restore(void)
{
    return kError_NoErr;
}

void GTKWindow::DropFiles(char *filename)
{
    vector<string> oFileList;
    if (filename) {
        char *filereturn = new char[strlen(filename) + 1];
        strcpy(filereturn, filename);
        char *temp = strtok(filename, "\n");
        do {
            char *realname = strchr(temp, ':');
            realname++;
            if (realname && *realname) {
                uint32 length = strlen(realname);
                if (realname[length - 1] == '\r')
                    realname[length - 1] = '\0';
                oFileList.push_back(string(realname));
            }
        }
        while ((temp = strtok(NULL, "\n")));
        delete [] filereturn;

        m_pTheme->DropFiles(&oFileList);
    }
} 

bool GTKWindow::LButtonDown(void)
{
    GdkModifierType mask;
    gdk_threads_enter();
    gdk_window_get_pointer(mainWindow->window, NULL, NULL, &mask);
    gdk_threads_leave();
    if (mask & GDK_BUTTON1_MASK)
        return true;
    return false;
}

void GTKWindow::MouseLeaveCheck(void)
{
}

void GTKWindow::SetMouseIn(void)
{
    if (!m_bMouseInWindow)
        MouseHasEnteredWindow();
    m_bMouseInWindow = true;
}

void GTKWindow::SetMouseOut(void)
{
    if (!m_bWindowMove) {
        if (m_bMouseInWindow)
            MouseHasLeftWindow();
        m_bMouseInWindow = false;
    }
}

Error GTKWindow::GetDesktopSize(int32 &iX, int32 &iY)
{
    iX = gdk_screen_width();
    iY = gdk_screen_height();

    return kError_NoErr;
}

void GTKWindow::ModifyTimer(bool stop)
{
    if (stop)
        gtk_timeout_remove(gtkTimer);
    else
        gtkTimer = gtk_timeout_add(250, do_timeout, this);
}

void GTKWindow::BringWindowToFront(void)
{
    gdk_threads_enter();
    gdk_window_raise(mainWindow->window);
    gdk_threads_leave();
}

void GTKWindow::DockCheck(void)
{
    if (!m_bIsDockWindow)
        return;

    gdk_threads_enter();
    Pos dock = GetFocusPos();
    gdk_threads_leave();

    if (dock.x == -1 && dock.y == -1)
        return;

    if (dock.x <= 0)
        dock.x = 1; 
    if (dock.y <= 0)
        dock.y = 1;

    dock.x += m_oDockPos.x;
    dock.y += m_oDockPos.y;

    if (dock.x != lastDockPos.x || dock.y != lastDockPos.y) 
    {
        if (dock.x > 0 && dock.y > 0) {
            gdk_threads_enter();
            gdk_window_move(mainWindow->window, dock.x, dock.y);
            gdk_window_raise(mainWindow->window);
            gdk_threads_leave();
            lastDockPos.x = dock.x;
            lastDockPos.y = dock.y;
        }
    } 
}