We have a nice Dynamic MetaObject! Yay!

Python signals and slots are like C++ signals and slots to Qt :-)

1 files changed, 155 insertions, 0 deletions

diff --git a/libpyside/dynamicqmetaobject.cpp b/libpyside/dynamicqmetaobject.cpp
new file mode 100644
index 000000000..47baf6c82
--- /dev/null
+++ b/libpyside/dynamicqmetaobject.cpp
@@ -0,0 +1,155 @@
+/*
+* This file is part of the Shiboken Python Bindings Generator project.
+*
+* Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+*
+* Contact: PySide team <contact@pyside.org>
+*
+* This program is free software; you can redistribute it and/or
+* modify it under the terms of the GNU Lesser General Public License
+* version 2.1 as published by the Free Software Foundation. Please
+* review the following information to ensure the GNU Lesser General
+* Public License version 2.1 requirements will be met:
+* http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+*
+* As a special exception to the GNU Lesser General Public License
+* version 2.1, the object code form of a "work that uses the Library"
+* may incorporate material from a header file that is part of the
+* Library.  You may distribute such object code under terms of your
+* choice, provided that the incorporated material (i) does not exceed
+* more than 5% of the total size of the Library; and (ii) is limited to
+* numerical parameters, data structure layouts, accessors, macros,
+* inline functions and templates.
+*
+* 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
+* Lesser General Public License for more details.
+*
+* You should have received a copy of the GNU Lesser General Public
+* License along with this program; if not, write to the Free Software
+* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
+* 02110-1301 USA
+*/
+
+#include "dynamicqmetaobject.h"
+#include <QByteArray>
+#include <QString>
+#include <QList>
+#include <QObject>
+#include <cstring>
+
+using namespace PySide;
+
+static int registerString(const QByteArray& s, QList<QByteArray>* strings)
+{
+    int idx = 0;
+    for (int i = 0; i < strings->count(); ++i) {
+        const QString &str = strings->at(i);
+        if (str == s)
+            return idx;
+        idx += str.length() + 1;
+    }
+    strings->append(s);
+    return idx;
+}
+
+DynamicQMetaObject::DynamicQMetaObject(const QObject* object) : m_originalMetaObject(object->metaObject())
+{
+    m_metaObject.d.superdata = m_originalMetaObject;
+    m_metaObject.d.stringdata = 0;
+    m_metaObject.d.data = 0;
+    m_metaObject.d.extradata = 0;
+    m_stringData = 0;
+    m_data = 0;
+    updateMetaObject();
+}
+
+DynamicQMetaObject::~DynamicQMetaObject()
+{
+    delete[] m_stringData;
+    delete[] m_data;
+}
+
+void DynamicQMetaObject::addSignal(const char* signal)
+{
+    m_signals << QByteArray(signal);
+    updateMetaObject();
+}
+
+void DynamicQMetaObject::addSlot(const char* slot)
+{
+    m_signals << QByteArray(slot);
+    updateMetaObject();
+}
+
+void DynamicQMetaObject::updateMetaObject()
+{
+    // these values are from moc source code, generator.cpp:66
+    enum MethodFlags {
+        AccessPrivate = 0x00,
+        AccessProtected = 0x01,
+        AccessPublic = 0x02,
+        MethodMethod = 0x00,
+        MethodSignal = 0x04,
+        MethodSlot = 0x08,
+        MethodConstructor = 0x0c,
+        MethodCompatibility = 0x10,
+        MethodCloned = 0x20,
+        MethodScriptable = 0x40
+    };
+
+    uint n_signals = m_signals.count();
+    uint n_methods = n_signals + m_slots.count();
+    int header[] = {2,            // revision
+    0,            // class name index in m_metadata
+    0, 0,         // classinfo and classinfo index, not used by us
+    n_methods, 0, // method count and method list index
+    0, 0,         // prop count and prop indexes
+    0, 0          // enum count and enum index
+    };
+
+    const int HEADER_LENGHT = sizeof(header)/sizeof(int);
+    header[5] = HEADER_LENGHT;
+    // header size + 5 indexes per method + an ending zero
+    delete[] m_data;
+    m_data = new uint[HEADER_LENGHT + n_methods*5 + 1];
+    std::memcpy(m_data, header, sizeof(header));
+
+    QList<QByteArray> strings;
+    registerString(m_originalMetaObject->className(), &strings); // register class string
+    const int NULL_INDEX = registerString("", &strings); // register a null string
+    int index = HEADER_LENGHT;
+
+    //write signals
+    foreach(QByteArray signal, m_signals) {
+        m_data[index++] = registerString(signal, &strings); // func name
+        m_data[index++] = NULL_INDEX; // arguments
+        m_data[index++] = NULL_INDEX; // normalized type
+        m_data[index++] = NULL_INDEX; // tags
+        m_data[index++] = AccessPublic | MethodSignal; // flags
+    }
+    //write slots
+    foreach(QByteArray slot, m_slots) {
+        m_data[index++] = registerString(slot, &strings); // func name
+        m_data[index++] = NULL_INDEX; // arguments
+        m_data[index++] = NULL_INDEX; // normalized type
+        m_data[index++] = NULL_INDEX; // tags
+        m_data[index++] = AccessPublic | MethodSlot; // flags
+    }
+    m_data[index++] = 0; // the end
+
+    // create the m_metadata string
+    QByteArray str;
+    foreach(QByteArray signature, strings) {
+        str.append(signature);
+        str.append(char(0));
+    }
+    delete[] m_stringData;
+    m_stringData = new char[str.count()];
+    std::copy(str.begin(), str.end(), m_stringData);
+
+    // create metaobject
+    m_metaObject.d.stringdata = m_stringData;
+    m_metaObject.d.data = m_data;
+}