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+/****************************************************************************
+**
+** 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