doc/src/snippets/code/src_gui_embedded_qcopchannel_qws.cpp


1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66

/****************************************************************************
**
** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the documentation of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:BSD$
** You may use this file under the terms of the BSD license as follows:
**
** "Redistribution and use in source and binary forms, with or without
** modification, are permitted provided that the following conditions are
** met:
**   * Redistributions of source code must retain the above copyright
**     notice, this list of conditions and the following disclaimer.
**   * Redistributions in binary form must reproduce the above copyright
**     notice, this list of conditions and the following disclaimer in
**     the documentation and/or other materials provided with the
**     distribution.
**   * Neither the name of Nokia Corporation and its Subsidiary(-ies) nor
**     the names of its contributors may be used to endorse or promote
**     products derived from this software without specific prior written
**     permission.
**
** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
** $QT_END_LICENSE$
**
****************************************************************************/

//! [0]
void MyClass::receive(const QString &message, const QByteArray &data)
{
    QDataStream in(data);
    if (message == "execute(QString,QString)") {
        QString cmd;
        QString arg;
        in >> cmd >> arg;
        ...
    } else if (message == "delete(QString)") {
        QString fileName;
        in >> fileName;
        ...
    } else {
        ...
    }
}
//! [0]


//! [1]
QByteArray data;
QDataStream out(&data, QIODevice::WriteOnly);
out << QString("cat") << QString("file.txt");
QCopChannel::send("System/Shell", "execute(QString,QString)", data);
//! [1]
/****************************************************************************
**
** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the documentation of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:BSD$
** You may use this file under the terms of the BSD license as follows:
**
** "Redistribution and use in source and binary forms, with or without
** modification, are permitted provided that the following conditions are
** met:
**   * Redistributions of source code must retain the above copyright
**     notice, this list of conditions and the following disclaimer.
**   * Redistributions in binary form must reproduce the above copyright
**     notice, this list of conditions and the following disclaimer in
**     the documentation and/or other materials provided with the
**     distribution.
**   * Neither the name of Nokia Corporation and its Subsidiary(-ies) nor
**     the names of its contributors may be used to endorse or promote
**     products derived from this software without specific prior written
**     permission.
**
** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
** $QT_END_LICENSE$
**
****************************************************************************/

//! [0]
QString s = Q3FileDialog::getOpenFileName(
                "/home",
                "Images (*.png *.xpm *.jpg)",
                this,
                "open file dialog",
                "Choose a file");
//! [0]


//! [1]
"Images (*.png *.xpm *.jpg);;Text files (*.txt);;XML files (*.xml)"
//! [1]


//! [2]
Q3FileDialog* fd = new Q3FileDialog(this, "file dialog", true);
fd->setMode(Q3FileDialog::AnyFile);
//! [2]


//! [3]
fd->setFilter("Images (*.png *.xpm *.jpg)");
//! [3]


//! [4]
fd->setViewMode(Q3FileDialog::Detail);
//! [4]


//! [5]
QString fileName;
if (fd->exec() == QDialog::Accepted)
    fileName = fd->selectedFile();
//! [5]


//! [6]
class Preview : public QLabel, public Q3FilePreview
{
public:
    Preview(QWidget *parent=0) : QLabel(parent) {}

    void previewUrl(const Q3Url &u)
    {
        QString path = u.path();
        QPixmap pix(path);
        if (pix.isNull())
            setText("This is not a pixmap");
        else
            setPixmap(pix);
    }
};
//! [6]


//! [7]
Preview* p = new Preview;

Q3FileDialog* fd = new Q3FileDialog(this);
fd->setContentsPreviewEnabled(true);
fd->setContentsPreview(p, p);
fd->setPreviewMode(Q3FileDialog::Contents);
fd->show();
//! [7]


//! [8]
QStringList list = myFileDialog.selectedFiles();
QStringList::Iterator it = list.begin();
while(it != list.end()) {
    myProcessing(*it);
    ++it;
}
//! [8]


//! [9]
fd->setFilter("All C++ files (*.cpp *.cc *.C *.cxx *.c++)");
fd->setFilter("*.cpp *.cc *.C *.cxx *.c++");
fd->setFilter("All C++ files (*.cpp;*.cc;*.C;*.cxx;*.c++)");
fd->setFilter("*.cpp;*.cc;*.C;*.cxx;*.c++");
//! [9]


//! [10]
QString s = Q3FileDialog::getOpenFileName(
                "/home",
                "Images (*.png *.xpm *.jpg)",
                this,
                "open file dialog",
                "Choose a file to open");
//! [10]


//! [11]
QString s = Q3FileDialog::getSaveFileName(
                "/home",
                "Images (*.png *.xpm *.jpg)",
                this,
                "save file dialog",
                "Choose a filename to save under");
//! [11]


//! [12]
QString s = Q3FileDialog::getExistingDirectory(
                "/home",
                this,
                "get existing directory",
                "Choose a directory",
                true);
//! [12]


//! [13]
MyFileDialog::MyFileDialog(QWidget* parent, const char* name) :
    Q3FileDialog(parent, name)
{
    QLabel* label = new QLabel("Added widgets", this);
    QLineEdit* lineedit = new QLineEdit(this);
    QPushButton* pushbutton = new QPushButton(this);

    addWidgets(label, lineedit, pushbutton);
}
//! [13]


//! [14]
QString types("Image files (*.png *.xpm *.jpg);;"
              "Text files (*.txt);;"
              "Any files (*)");
Q3FileDialog fd = new Q3FileDialog(this);
fd->setFilters(types);
fd->show();
//! [14]


//! [15]
Q3FileDialog* fd = new Q3FileDialog(this);
fd->addFilter("Images (*.png *.jpg *.xpm)");
fd->show();
//! [15]


//! [16]
QStringList files = Q3FileDialog::getOpenFileNames(
                        "Images (*.png *.xpm *.jpg)",
                        "/home",
                        this,
                        "open files dialog",
                        "Select one or more files to open");
//! [16]


//! [17]
QStringList list = files;
QStringList::Iterator it = list.begin();
while(it != list.end()) {
    myProcessing(*it);
    ++it;
}
//! [17]


//! [18]
class Preview : public QLabel, public Q3FilePreview
{
public:
    Preview(QWidget *parent=0) : QLabel(parent) {}

    void previewUrl(const Q3Url &u)
    {
        QString path = u.path();
        QPixmap pix(path);
        if (pix.isNull())
            setText("This is not a pixmap");
        else
            setText("This is a pixmap");
    }
};

//...

int main(int argc, char** argv)
{
    Preview* p = new Preview;

    Q3FileDialog* fd = new Q3FileDialog(this);
    fd->setInfoPreviewEnabled(true);
    fd->setInfoPreview(p, p);
    fd->setPreviewMode(Q3FileDialog::Info);
    fd->show();
}

//! [18]


//! [19]
class Preview : public QLabel, public Q3FilePreview
{
public:
    Preview(QWidget *parent=0) : QLabel(parent) {}

    void previewUrl(const Q3Url &u)
    {
        QString path = u.path();
        QPixmap pix(path);
        if (pix.isNull())
            setText("This is not a pixmap");
        else
            setPixmap(pix);
    }
};

//...

int main(int argc, char** argv)
{
    Preview* p = new Preview;

    Q3FileDialog* fd = new Q3FileDialog(this);
    fd->setContentsPreviewEnabled(true);
    fd->setContentsPreview(p, p);
    fd->setPreviewMode(Q3FileDialog::Contents);
    fd->show();
}
//! [19]