rewrite editor info bar handling

the info about the bars is now stored in the IFile, not in the
EditorView. this is somewhat more expensive for the bars which
identically apply to all editors of one type, but fixes consistency
issues between views.

additionally, it is now possible to set several simultaneous
info bars per file, which ensures that no information is lost.

Co-authored-by: mae

src/plugins/coreplugin/infobar.cpp

@@ -0,0 +1,201 @@
+/**************************************************************************
+**
+** This file is part of Qt Creator
+**
+** Copyright (c) 2011 Nokia Corporation and/or its subsidiary(-ies).
+**
+** Contact: Nokia Corporation (info@qt.nokia.com)
+**
+**
+** GNU Lesser General Public License Usage
+**
+** 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.
+**
+** Other Usage
+**
+** Alternatively, this file may be used in accordance with the terms and
+** conditions contained in a signed written agreement between you and Nokia.
+**
+** If you have questions regarding the use of this file, please contact
+** Nokia at qt-info@nokia.com.
+**
+**************************************************************************/
+
+#include "infobar.h"
+
+#include <coreplugin/coreconstants.h>
+
+#include <QtGui/QFrame>
+#include <QtGui/QHBoxLayout>
+#include <QtGui/QLabel>
+#include <QtGui/QToolButton>
+
+#include <QtCore/QVariant>
+
+namespace Core {
+
+InfoBarEntry::InfoBarEntry(const QString &_id, const QString &_infoText)
+    : id(_id)
+    , infoText(_infoText)
+    , object(0)
+    , buttonPressMember(0)
+    , cancelObject(0)
+    , cancelButtonPressMember(0)
+{
+}
+
+void InfoBarEntry::setCustomButtonInfo(const QString &_buttonText, QObject *_object, const char *_member)
+{
+    buttonText = _buttonText;
+    object = _object;
+    buttonPressMember = _member;
+}
+
+void InfoBarEntry::setCancelButtonInfo(QObject *_object, const char *_member)
+{
+    cancelObject = _object;
+    cancelButtonPressMember = _member;
+}
+
+
+void InfoBar::addInfo(const InfoBarEntry &info)
+{
+    m_infoBarEntries << info;
+    emit changed();
+}
+
+void InfoBar::removeInfo(const QString &id)
+{
+    QMutableListIterator<InfoBarEntry> it(m_infoBarEntries);
+    while (it.hasNext())
+        if (it.next().id == id) {
+            it.remove();
+            emit changed();
+            return;
+        }
+}
+
+void InfoBar::clear()
+{
+    if (!m_infoBarEntries.isEmpty()) {
+        m_infoBarEntries.clear();
+        emit changed();
+    }
+}
+
+
+InfoBarDisplay::InfoBarDisplay(QObject *parent)
+    : QObject(parent)
+    , m_infoBar(0)
+    , m_boxLayout(0)
+    , m_boxIndex(0)
+{
+}
+
+void InfoBarDisplay::setTarget(QBoxLayout *layout, int index)
+{
+    m_boxLayout = layout;
+    m_boxIndex = index;
+}
+
+void InfoBarDisplay::setInfoBar(InfoBar *infoBar)
+{
+    if (m_infoBar == infoBar)
+        return;
+
+    if (m_infoBar)
+        m_infoBar->disconnect(this);
+    m_infoBar = infoBar;
+    if (m_infoBar) {
+        connect(infoBar, SIGNAL(changed()), SLOT(update()));
+        connect(infoBar, SIGNAL(destroyed()), SLOT(infoBarDestroyed()));
+    }
+    update();
+}
+
+void InfoBarDisplay::infoBarDestroyed()
+{
+    m_infoBar = 0;
+    // Calling update() here causes a complicated crash on shutdown.
+    // So instead we rely on the view now being either destroyed (in which case it
+    // will delete the widgets itself) or setInfoBar() being called explicitly.
+}
+
+void InfoBarDisplay::update()
+{
+    foreach (QWidget *widget, m_infoWidgets) {
+        widget->disconnect(this); // We want no destroyed() signal now
+        delete widget;
+    }
+    m_infoWidgets.clear();
+
+    if (!m_infoBar)
+        return;
+
+    foreach (const InfoBarEntry &info, m_infoBar->m_infoBarEntries) {
+        QFrame *infoWidget = new QFrame;
+
+        QPalette pal = infoWidget->palette();
+        pal.setColor(QPalette::Window, QColor(255, 255, 225));
+        pal.setColor(QPalette::WindowText, Qt::black);
+
+        infoWidget->setPalette(pal);
+        infoWidget->setFrameStyle(QFrame::Panel | QFrame::Raised);
+        infoWidget->setLineWidth(1);
+        infoWidget->setAutoFillBackground(true);
+
+        QHBoxLayout *hbox = new QHBoxLayout(infoWidget);
+        hbox->setMargin(2);
+
+        QLabel *infoWidgetLabel = new QLabel(info.infoText);
+        infoWidgetLabel->setWordWrap(true);
+        hbox->addWidget(infoWidgetLabel);
+
+        if (!info.buttonText.isEmpty()) {
+            QToolButton *infoWidgetButton = new QToolButton;
+            infoWidgetButton->setText(info.buttonText);
+            connect(infoWidgetButton, SIGNAL(clicked()), info.object, info.buttonPressMember);
+
+            hbox->addWidget(infoWidgetButton);
+        }
+
+        QToolButton *infoWidgetCloseButton = new QToolButton;
+        infoWidgetCloseButton->setAutoRaise(true);
+        infoWidgetCloseButton->setIcon(QIcon(QLatin1String(Core::Constants::ICON_CLEAR)));
+        infoWidgetCloseButton->setToolTip(tr("Close"));
+        infoWidgetCloseButton->setProperty("infoId", info.id);
+        connect(infoWidgetCloseButton, SIGNAL(clicked()), SLOT(cancelButtonClicked()));
+
+        if (info.cancelObject)
+            connect(infoWidgetCloseButton, SIGNAL(clicked()),
+                    info.cancelObject, info.cancelButtonPressMember);
+
+        hbox->addWidget(infoWidgetCloseButton);
+
+        connect(infoWidget, SIGNAL(destroyed()), SLOT(widgetDestroyed()));
+        m_boxLayout->insertWidget(m_boxIndex, infoWidget);
+        m_infoWidgets << infoWidget;
+    }
+}
+
+void InfoBarDisplay::widgetDestroyed()
+{
+    // This means that the parent is being deleted
+    m_infoWidgets.clear();
+}
+
+void InfoBarDisplay::cancelButtonClicked()
+{
+    m_infoBar->removeInfo(sender()->property("infoId").toString());
+}
+
+} // namespace Core