qdnd.cpp

奇趣公司比较新的qt/emd版本

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#include "qplatformdefs.h"

#ifndef QT_NO_DRAGANDDROP
#include "qbitmap.h"
#include "qdrag.h"
#include "qpixmap.h"
#include "qevent.h"
#include "qfile.h"
#include "qtextcodec.h"
#include "qapplication.h"
#include "qpoint.h"
#include "qwidget.h"
#include "qbuffer.h"
#include "qimage.h"
#include "qregexp.h"
#include "qdir.h"
#include "qdnd_p.h"
#include "qimagereader.h"
#include "qimagewriter.h"
#include "qdebug.h"
#include <ctype.h>

// These pixmaps approximate the images in the Windows User Interface Guidelines.

// XPM

static const char * const move_xpm[] = {
"11 20 3 1",
".        c None",
#if defined(Q_WS_WIN)
"a        c #000000",
"X        c #FFFFFF", // Windows cursor is traditionally white
#else
"a        c #FFFFFF",
"X        c #000000", // X11 cursor is traditionally black
#endif
"aa.........",
"aXa........",
"aXXa.......",
"aXXXa......",
"aXXXXa.....",
"aXXXXXa....",
"aXXXXXXa...",
"aXXXXXXXa..",
"aXXXXXXXXa.",
"aXXXXXXXXXa",
"aXXXXXXaaaa",
"aXXXaXXa...",
"aXXaaXXa...",
"aXa..aXXa..",
"aa...aXXa..",
"a.....aXXa.",
"......aXXa.",
".......aXXa",
".......aXXa",
"........aa."};

#ifdef Q_WS_WIN
/* XPM */
static const char * const ignore_xpm[] = {
"24 30 3 1",
".        c None",
"a        c #000000",
"X        c #FFFFFF",
"aa......................",
"aXa.....................",
"aXXa....................",
"aXXXa...................",
"aXXXXa..................",
"aXXXXXa.................",
"aXXXXXXa................",
"aXXXXXXXa...............",
"aXXXXXXXXa..............",
"aXXXXXXXXXa.............",
"aXXXXXXaaaa.............",
"aXXXaXXa................",
"aXXaaXXa................",
"aXa..aXXa...............",
"aa...aXXa...............",
"a.....aXXa..............",
"......aXXa.....XXXX.....",
".......aXXa..XXaaaaXX...",
".......aXXa.XaaaaaaaaX..",
"........aa.XaaaXXXXaaaX.",
"...........XaaaaX..XaaX.",
"..........XaaXaaaX..XaaX",
"..........XaaXXaaaX.XaaX",
"..........XaaX.XaaaXXaaX",
"..........XaaX..XaaaXaaX",
"...........XaaX..XaaaaX.",
"...........XaaaXXXXaaaX.",
"............XaaaaaaaaX..",
".............XXaaaaXX...",
"...............XXXX....."};
#endif

/* XPM */
static const char * const copy_xpm[] = {
"24 30 3 1",
".        c None",
"a        c #000000",
"X        c #FFFFFF",
#if defined(Q_WS_WIN) // Windows cursor is traditionally white
"aa......................",
"aXa.....................",
"aXXa....................",
"aXXXa...................",
"aXXXXa..................",
"aXXXXXa.................",
"aXXXXXXa................",
"aXXXXXXXa...............",
"aXXXXXXXXa..............",
"aXXXXXXXXXa.............",
"aXXXXXXaaaa.............",
"aXXXaXXa................",
"aXXaaXXa................",
"aXa..aXXa...............",
"aa...aXXa...............",
"a.....aXXa..............",
"......aXXa..............",
".......aXXa.............",
".......aXXa.............",
"........aa...aaaaaaaaaaa",
#else
"XX......................",
"XaX.....................",
"XaaX....................",
"XaaaX...................",
"XaaaaX..................",
"XaaaaaX.................",
"XaaaaaaX................",
"XaaaaaaaX...............",
"XaaaaaaaaX..............",
"XaaaaaaaaaX.............",
"XaaaaaaXXXX.............",
"XaaaXaaX................",
"XaaXXaaX................",
"XaX..XaaX...............",
"XX...XaaX...............",
"X.....XaaX..............",
"......XaaX..............",
".......XaaX.............",
".......XaaX.............",
"........XX...aaaaaaaaaaa",
#endif
".............aXXXXXXXXXa",
".............aXXXXXXXXXa",
".............aXXXXaXXXXa",
".............aXXXXaXXXXa",
".............aXXaaaaaXXa",
".............aXXXXaXXXXa",
".............aXXXXaXXXXa",
".............aXXXXXXXXXa",
".............aXXXXXXXXXa",
".............aaaaaaaaaaa"};

/* XPM */
static const char * const link_xpm[] = {
"24 30 3 1",
".        c None",
"a        c #000000",
"X        c #FFFFFF",
#if defined(Q_WS_WIN) // Windows cursor is traditionally white
"aa......................",
"aXa.....................",
"aXXa....................",
"aXXXa...................",
"aXXXXa..................",
"aXXXXXa.................",
"aXXXXXXa................",
"aXXXXXXXa...............",
"aXXXXXXXXa..............",
"aXXXXXXXXXa.............",
"aXXXXXXaaaa.............",
"aXXXaXXa................",
"aXXaaXXa................",
"aXa..aXXa...............",
"aa...aXXa...............",
"a.....aXXa..............",
"......aXXa..............",
".......aXXa.............",
".......aXXa.............",
"........aa...aaaaaaaaaaa",
#else
"XX......................",
"XaX.....................",
"XaaX....................",
"XaaaX...................",
"XaaaaX..................",
"XaaaaaX.................",
"XaaaaaaX................",
"XaaaaaaaX...............",
"XaaaaaaaaX..............",
"XaaaaaaaaaX.............",
"XaaaaaaXXXX.............",
"XaaaXaaX................",
"XaaXXaaX................",
"XaX..XaaX...............",
"XX...XaaX...............",
"X.....XaaX..............",
"......XaaX..............",
".......XaaX.............",
".......XaaX.............",
"........XX...aaaaaaaaaaa",
#endif
".............aXXXXXXXXXa",
".............aXXXaaaaXXa",
".............aXXXXaaaXXa",
".............aXXXaaaaXXa",
".............aXXaaaXaXXa",
".............aXXaaXXXXXa",
".............aXXaXXXXXXa",
".............aXXXaXXXXXa",
".............aXXXXXXXXXa",
".............aaaaaaaaaaa"};

#ifndef QT_NO_DRAGANDDROP

//#define QDND_DEBUG

#ifdef QDND_DEBUG
QString dragActionsToString(Qt::DropActions actions)
{
    QString str;
    if (actions == Qt::IgnoreAction) {
        if (!str.isEmpty())
            str += " | ";
        str += "IgnoreAction";
    }
    if (actions & Qt::LinkAction) {
        if (!str.isEmpty())
            str += " | ";
        str += "LinkAction";
    }
    if (actions & Qt::CopyAction) {
        if (!str.isEmpty())
            str += " | ";
        str += "CopyAction";
    }
    if (actions & Qt::MoveAction) {
        if (!str.isEmpty())
            str += " | ";
        str += "MoveAction";
    }
    if ((actions & Qt::TargetMoveAction) == Qt::TargetMoveAction ) {
        if (!str.isEmpty())
            str += " | ";
        str += "TargetMoveAction";
    }
    return str;
}

QString KeyboardModifiersToString(Qt::KeyboardModifiers moderfies)
{
    QString str;
    if (moderfies & Qt::ControlModifier) {
        if (!str.isEmpty())
            str += " | ";
        str += Qt::ControlModifier;
    }
    if (moderfies & Qt::AltModifier) {
        if (!str.isEmpty())
            str += " | ";
        str += Qt::AltModifier;
    }
    if (moderfies & Qt::ShiftModifier) {
        if (!str.isEmpty())
            str += " | ";
        str += Qt::ShiftModifier;
    }
    return str;
}
#endif


// the universe's only drag manager
QDragManager *QDragManager::instance = 0;


QDragManager::QDragManager()
    : QObject(qApp)
{
    Q_ASSERT(!instance);

#ifdef Q_WS_WIN
    n_cursor = 4;
#else 
    n_cursor = 3;
#endif

#ifdef Q_WS_QWS
    currentActionForOverrideCursor = Qt::IgnoreAction;
#endif
    pm_cursor = new QPixmap[n_cursor];
    pm_cursor[0] = QPixmap((const char **)move_xpm);
    pm_cursor[1] = QPixmap((const char **)copy_xpm);
    pm_cursor[2] = QPixmap((const char **)link_xpm);
#ifdef Q_WS_WIN
    pm_cursor[3] = QPixmap((const char **)ignore_xpm);
#endif
    object = 0;
    beingCancelled = false;
    restoreCursor = false;
    willDrop = false;
    eventLoop = 0;
    dropData = new QDropData();