Initial import from the monolithic Qt.

This is the beginning of revision history for this module. If you
want to look at revision history older than this, please refer to the
Qt Git wiki for how to use Git history grafting. At the time of
writing, this wiki is located here:

http://qt.gitorious.org/qt/pages/GitIntroductionWithQt

If you have already performed the grafting and you don't see any
history beyond this commit, try running "git log" with the "--follow"
argument.

Branched from the monolithic repo, Qt master branch, at commit
896db169ea224deb96c59ce8af800d019de63f12

1 files changed, 446 insertions, 0 deletions

diff --git a/src/designer/src/components/buddyeditor/buddyeditor.cpp b/src/designer/src/components/buddyeditor/buddyeditor.cpp
new file mode 100644
index 000000000..34e1681ef
--- /dev/null
+++ b/src/designer/src/components/buddyeditor/buddyeditor.cpp
@@ -0,0 +1,446 @@
+/****************************************************************************
+**
+** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the Qt Designer of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the Technology Preview License Agreement accompanying
+** this package.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file.  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.
+**
+** In addition, as a special exception, Nokia gives you certain additional
+** rights.  These rights are described in the Nokia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** If you have questions regarding the use of this file, please contact
+** Nokia at qt-info@nokia.com.
+**
+**
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "buddyeditor.h"
+
+#include <QtDesigner/QDesignerFormWindowInterface>
+#include <QtDesigner/QDesignerPropertySheetExtension>
+#include <QtDesigner/QDesignerFormEditorInterface>
+#include <QtDesigner/QExtensionManager>
+
+#include <qdesigner_command_p.h>
+#include <qdesigner_propertycommand_p.h>
+#include <qdesigner_utils_p.h>
+#include <qlayout_widget_p.h>
+#include <connectionedit_p.h>
+#include <metadatabase_p.h>
+
+#include <QtCore/qdebug.h>
+#include <QtGui/QLabel>
+#include <QtGui/QMenu>
+#include <QtGui/QAction>
+#include <QtGui/QApplication>
+
+QT_BEGIN_NAMESPACE
+
+static const char *buddyPropertyC = "buddy";
+
+static bool canBeBuddy(QWidget *w, QDesignerFormWindowInterface *form)
+{
+    if (qobject_cast<const QLayoutWidget*>(w) || qobject_cast<const QLabel*>(w))
+        return false;
+    if (w == form->mainContainer() || w->isHidden() )
+        return false;
+
+    QExtensionManager *ext = form->core()->extensionManager();
+    if (QDesignerPropertySheetExtension *sheet = qt_extension<QDesignerPropertySheetExtension*>(ext, w)) {
+        const int index = sheet->indexOf(QLatin1String("focusPolicy"));
+        if (index != -1) {
+            bool ok = false;
+            const Qt::FocusPolicy q = static_cast<Qt::FocusPolicy>(qdesigner_internal::Utils::valueOf(sheet->property(index), &ok));
+            // Refuse No-focus unless the widget is promoted.
+            return (ok && q != Qt::NoFocus) || qdesigner_internal::isPromoted(form->core(), w);
+        }
+    }
+    return false;
+}
+
+static QString buddy(QLabel *label, QDesignerFormEditorInterface *core)
+{
+    QDesignerPropertySheetExtension *sheet = qt_extension<QDesignerPropertySheetExtension*>(core->extensionManager(), label);
+    if (sheet == 0)
+        return QString();
+    const int prop_idx = sheet->indexOf(QLatin1String(buddyPropertyC));
+    if (prop_idx == -1)
+        return QString();
+    return sheet->property(prop_idx).toString();
+}
+
+typedef QList<QLabel*> LabelList;
+
+namespace qdesigner_internal {
+
+/*******************************************************************************
+** BuddyEditor
+*/
+
+BuddyEditor::BuddyEditor(QDesignerFormWindowInterface *form, QWidget *parent) :
+    ConnectionEdit(parent, form),
+    m_formWindow(form),
+    m_updating(false)
+{
+}
+
+
+QWidget *BuddyEditor::widgetAt(const QPoint &pos) const
+{
+    QWidget *w = ConnectionEdit::widgetAt(pos);
+
+    while (w != 0 && !m_formWindow->isManaged(w))
+        w = w->parentWidget();
+    if (!w)
+        return w;
+
+    if (state() == Editing) {
+        QLabel *label = qobject_cast<QLabel*>(w);
+        if (label == 0)
+            return 0;
+        const int cnt = connectionCount();
+        for (int i = 0; i < cnt; ++i) {
+            Connection *con = connection(i);
+            if (con->widget(EndPoint::Source) == w)
+                return 0;
+        }
+    } else {
+        if (!canBeBuddy(w, m_formWindow))
+            return 0;
+    }
+
+    return w;
+}
+
+Connection *BuddyEditor::createConnection(QWidget *source, QWidget *destination)
+{
+    return new Connection(this, source, destination);
+}
+
+QDesignerFormWindowInterface *BuddyEditor::formWindow() const
+{
+    return m_formWindow;
+}
+
+void BuddyEditor::updateBackground()
+{
+    if (m_updating || background() == 0)
+        return;
+    ConnectionEdit::updateBackground();
+
+    m_updating = true;
+    QList<Connection *> newList;
+    const LabelList label_list = background()->findChildren<QLabel*>();
+    foreach (QLabel *label, label_list) {
+        const QString buddy_name = buddy(label, m_formWindow->core());
+        if (buddy_name.isEmpty())
+            continue;
+
+        const QList<QWidget *> targets = background()->findChildren<QWidget*>(buddy_name);
+        if (targets.isEmpty())
+            continue;
+
+        QWidget *target = 0;
+
+        QListIterator<QWidget *> it(targets);
+        while (it.hasNext()) {
+            QWidget *widget = it.next();
+            if (widget && !widget->isHidden()) {
+                target = widget;
+                break;
+            }
+        }
+
+        if (target == 0)
+            continue;
+
+        Connection *con = new Connection(this);
+        con->setEndPoint(EndPoint::Source, label, widgetRect(label).center());
+        con->setEndPoint(EndPoint::Target, target, widgetRect(target).center());
+        newList.append(con);
+    }
+
+    QList<Connection *> toRemove;
+
+    const int c = connectionCount();
+    for (int i = 0; i < c; i++) {
+        Connection *con = connection(i);
+        QObject *source = con->object(EndPoint::Source);
+        QObject *target = con->object(EndPoint::Target);
+        bool found = false;
+        QListIterator<Connection *> it(newList);
+        while (it.hasNext()) {
+            Connection *newConn = it.next();
+            if (newConn->object(EndPoint::Source) == source && newConn->object(EndPoint::Target) == target) {
+                found = true;
+                break;
+            }
+        }
+        if (found == false)
+            toRemove.append(con);
+    }
+    if (!toRemove.isEmpty()) {
+        DeleteConnectionsCommand command(this, toRemove);
+        command.redo();
+        foreach (Connection *con, toRemove)
+            delete takeConnection(con);
+    }
+
+    QListIterator<Connection *> it(newList);
+    while (it.hasNext()) {
+        Connection *newConn = it.next();
+
+        bool found = false;
+        const int c = connectionCount();
+        for (int i = 0; i < c; i++) {
+            Connection *con = connection(i);
+            if (con->object(EndPoint::Source) == newConn->object(EndPoint::Source) &&
+                            con->object(EndPoint::Target) == newConn->object(EndPoint::Target)) {
+                found = true;
+                break;
+            }
+        }
+        if (found == false) {
+            AddConnectionCommand command(this, newConn);
+            command.redo();
+        } else {
+            delete newConn;
+        }
+    }
+    m_updating = false;
+}
+
+void BuddyEditor::setBackground(QWidget *background)
+{
+    clear();
+    ConnectionEdit::setBackground(background);
+
+    const LabelList label_list = background->findChildren<QLabel*>();
+    foreach (QLabel *label, label_list) {
+        const QString buddy_name = buddy(label, m_formWindow->core());
+        if (buddy_name.isEmpty())
+            continue;
+        QWidget *target = background->findChild<QWidget*>(buddy_name);
+        if (target == 0)
+            continue;
+
+        Connection *con = new Connection(this);
+        con->setEndPoint(EndPoint::Source, label, widgetRect(label).center());
+        con->setEndPoint(EndPoint::Target, target, widgetRect(target).center());
+        addConnection(con);
+    }
+}
+
+static QUndoCommand *createBuddyCommand(QDesignerFormWindowInterface *fw, QLabel *label, QWidget *buddy)
+{
+    SetPropertyCommand *command = new SetPropertyCommand(fw);
+    command->init(label, QLatin1String(buddyPropertyC), buddy->objectName());
+    command->setText(BuddyEditor::tr("Add buddy"));
+    return command;
+}
+
+void BuddyEditor::endConnection(QWidget *target, const QPoint &pos)
+{
+    Connection *tmp_con = newlyAddedConnection();
+    Q_ASSERT(tmp_con != 0);
+
+    tmp_con->setEndPoint(EndPoint::Target, target, pos);
+
+    QWidget *source = tmp_con->widget(EndPoint::Source);
+    Q_ASSERT(source != 0);
+    Q_ASSERT(target != 0);
+    setEnabled(false);
+    Connection *new_con = createConnection(source, target);
+    setEnabled(true);
+    if (new_con != 0) {
+        new_con->setEndPoint(EndPoint::Source, source, tmp_con->endPointPos(EndPoint::Source));
+        new_con->setEndPoint(EndPoint::Target, target, tmp_con->endPointPos(EndPoint::Target));
+
+        selectNone();
+        addConnection(new_con);
+        QLabel *source = qobject_cast<QLabel*>(new_con->widget(EndPoint::Source));
+        QWidget *target = new_con->widget(EndPoint::Target);
+        if (source) {
+            undoStack()->push(createBuddyCommand(m_formWindow, source, target));
+        } else {
+            qDebug("BuddyEditor::endConnection(): not a label");
+        }
+        setSelected(new_con, true);
+    }
+
+    clearNewlyAddedConnection();
+    findObjectsUnderMouse(mapFromGlobal(QCursor::pos()));
+}
+
+void BuddyEditor::widgetRemoved(QWidget *widget)
+{
+    QList<QWidget*> child_list = widget->findChildren<QWidget*>();
+    child_list.prepend(widget);
+
+    ConnectionSet remove_set;
+    foreach (QWidget *w, child_list) {
+        const ConnectionList &cl = connectionList();
+        foreach (Connection *con, cl) {
+            if (con->widget(EndPoint::Source) == w || con->widget(EndPoint::Target) == w)
+                remove_set.insert(con, con);
+        }
+    }
+
+    if (!remove_set.isEmpty()) {
+        undoStack()->beginMacro(tr("Remove buddies"));
+        foreach (Connection *con, remove_set) {
+            setSelected(con, false);
+            con->update();
+            QWidget *source = con->widget(EndPoint::Source);
+            if (qobject_cast<QLabel*>(source) == 0) {
+                qDebug("BuddyConnection::widgetRemoved(): not a label");
+            } else {
+                ResetPropertyCommand *command = new ResetPropertyCommand(formWindow());
+                command->init(source, QLatin1String(buddyPropertyC));
+                undoStack()->push(command);
+            }
+            delete takeConnection(con);
+        }
+        undoStack()->endMacro();
+    }
+}
+
+void BuddyEditor::deleteSelected()
+{
+    const ConnectionSet selectedConnections = selection(); // want copy for unselect
+    if (selectedConnections.isEmpty())
+        return;
+
+    undoStack()->beginMacro(tr("Remove %n buddies", 0, selectedConnections.size()));
+    foreach (Connection *con, selectedConnections) {
+        setSelected(con, false);
+        con->update();
+        QWidget *source = con->widget(EndPoint::Source);
+        if (qobject_cast<QLabel*>(source) == 0) {
+            qDebug("BuddyConnection::deleteSelected(): not a label");
+        } else {
+            ResetPropertyCommand *command = new ResetPropertyCommand(formWindow());
+            command->init(source, QLatin1String(buddyPropertyC));
+            undoStack()->push(command);
+        }
+        delete takeConnection(con);
+    }
+    undoStack()->endMacro();
+}
+
+void BuddyEditor::autoBuddy()
+{
+    // Any labels?
+    LabelList labelList = background()->findChildren<QLabel*>();
+    if (labelList.empty())
+        return;
+    // Find already used buddies
+    QWidgetList usedBuddies;
+    const ConnectionList &beforeConnections = connectionList();
+    foreach (const Connection *c, beforeConnections)
+        usedBuddies.push_back(c->widget(EndPoint::Target));
+    // Find potential new buddies, keep lists in sync
+    QWidgetList buddies;
+    for (LabelList::iterator it = labelList.begin(); it != labelList.end(); ) {
+        QLabel *label = *it;
+        QWidget *newBuddy = 0;
+        if (m_formWindow->isManaged(label)) {
+            const QString buddy_name = buddy(label, m_formWindow->core());
+            if (buddy_name.isEmpty())
+                newBuddy = findBuddy(label, usedBuddies);
+        }
+        if (newBuddy) {
+            buddies.push_back(newBuddy);
+            usedBuddies.push_back(newBuddy);
+            ++it;
+        } else {
+            it = labelList.erase(it);
+        }
+    }
+    // Add the list in one go.
+    if (labelList.empty())
+        return;
+    const int count = labelList.size();
+    Q_ASSERT(count == buddies.size());
+    undoStack()->beginMacro(tr("Add %n buddies", 0, count));
+    for (int i = 0; i < count; i++)
+        undoStack()->push(createBuddyCommand(m_formWindow, labelList.at(i), buddies.at(i)));
+    undoStack()->endMacro();
+    // Now select all new ones
+    const ConnectionList &connections = connectionList();
+    foreach (Connection *con, connections)
+        setSelected(con, buddies.contains(con->widget(EndPoint::Target)));
+}
+
+// Geometrically find  a potential buddy for label by checking neighbouring children of parent
+QWidget *BuddyEditor::findBuddy(QLabel *l, const QWidgetList &existingBuddies) const
+{
+    enum { DeltaX = 5 };
+    const QWidget *parent = l->parentWidget();
+    // Try to find next managed neighbour on horizontal line
+    const QRect geom = l->geometry();
+    const int y = geom.center().y();
+    QWidget *neighbour = 0;
+    switch (l->layoutDirection()) {
+    case Qt::LayoutDirectionAuto:
+    case Qt::LeftToRight: { // Walk right to find next managed neighbour
+        const int xEnd = parent->size().width();
+        for (int x = geom.right() + 1; x < xEnd; x += DeltaX)
+            if (QWidget *c = parent->childAt (x, y))
+                if (m_formWindow->isManaged(c)) {
+                    neighbour = c;
+                    break;
+                }
+    }
+        break;
+    case Qt::RightToLeft:  // Walk left to find next managed neighbour
+        for (int x = geom.x() - 1; x >= 0; x -= DeltaX)
+            if (QWidget *c = parent->childAt (x, y))
+                if (m_formWindow->isManaged(c)) {
+                    neighbour = c;
+                    break;
+                }
+        break;
+    }
+    if (neighbour && !existingBuddies.contains(neighbour) && canBeBuddy(neighbour, m_formWindow))
+        return neighbour;
+
+    return 0;
+}
+
+void BuddyEditor::createContextMenu(QMenu &menu)
+{
+    QAction *autoAction = menu.addAction(tr("Set automatically"));
+    connect(autoAction, SIGNAL(triggered()), this, SLOT(autoBuddy()));
+    menu.addSeparator();
+    ConnectionEdit::createContextMenu(menu);
+}
+
+}
+
+QT_END_NAMESPACE