Utils: add ElidingLabel for displaying elided text

Change-Id: I520e2f0a0c7dc2172ab8b0f8be152c7ff2e7e5bb
Reviewed-by: Daniel Teske <daniel.teske@digia.com>

src/libs/utils/elidinglabel.cpp

@@ -0,0 +1,81 @@
+/****************************************************************************
+**
+** Copyright (C) 2012 Digia Plc and/or its subsidiary(-ies).
+** Contact: http://www.qt-project.org/legal
+**
+** This file is part of Qt Creator.
+**
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and Digia.  For licensing terms and
+** conditions see http://qt.digia.com/licensing.  For further information
+** use the contact form at http://qt.digia.com/contact-us.
+**
+** 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, Digia gives you certain additional
+** rights.  These rights are described in the Digia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+****************************************************************************/
+
+#include "elidinglabel.h"
+#include <QFontMetrics>
+#include <QPainter>
+#include <QStyle>
+
+/*!
+    \class Utils::ElidingLabel
+
+    \brief A label suitable for displaying elided text.
+*/
+
+namespace Utils {
+
+ElidingLabel::ElidingLabel(QWidget *parent)
+    : QLabel(parent), m_elideMode(Qt::ElideRight)
+{
+    setSizePolicy(QSizePolicy(QSizePolicy::Ignored, QSizePolicy::Preferred, QSizePolicy::Label));
+}
+
+ElidingLabel::ElidingLabel(const QString &text, QWidget *parent)
+    : QLabel(text, parent), m_elideMode(Qt::ElideRight)
+{
+    setSizePolicy(QSizePolicy(QSizePolicy::Ignored, QSizePolicy::Preferred, QSizePolicy::Label));
+}
+
+Qt::TextElideMode ElidingLabel::elideMode() const
+{
+    return m_elideMode;
+}
+
+void ElidingLabel::setElideMode(const Qt::TextElideMode &elideMode)
+{
+    m_elideMode = elideMode;
+    update();
+}
+
+void ElidingLabel::paintEvent(QPaintEvent *)
+{
+    const int m = margin();
+    QRect contents = contentsRect().adjusted(m, m, -m, -m);
+    QFontMetrics fm = fontMetrics();
+    QString txt = text();
+    if (txt.length() > 4 && fm.width(txt) > contents.width())
+        txt = fm.elidedText(txt, m_elideMode, contents.width());
+    int flags = QStyle::visualAlignment(layoutDirection(), alignment()) | Qt::TextSingleLine;
+
+    QPainter painter(this);
+    drawFrame(&painter);
+    painter.drawText(contents, flags, txt);
+}
+
+} // namespace Utils

src/libs/utils/elidinglabel.h

@@ -0,0 +1,59 @@
+/****************************************************************************
+**
+** Copyright (C) 2012 Digia Plc and/or its subsidiary(-ies).
+** Contact: http://www.qt-project.org/legal
+**
+** This file is part of Qt Creator.
+**
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and Digia.  For licensing terms and
+** conditions see http://qt.digia.com/licensing.  For further information
+** use the contact form at http://qt.digia.com/contact-us.
+**
+** 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, Digia gives you certain additional
+** rights.  These rights are described in the Digia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+****************************************************************************/
+
+#ifndef ELIDINGLABEL_H
+#define ELIDINGLABEL_H
+
+#include "utils_global.h"
+#include <QLabel>
+
+namespace Utils {
+
+class  QTCREATOR_UTILS_EXPORT ElidingLabel : public QLabel
+{
+    Q_OBJECT
+    Q_PROPERTY(Qt::TextElideMode elideMode READ elideMode WRITE setElideMode DESIGNABLE true)
+
+public:
+    explicit ElidingLabel(QWidget *parent = 0);
+    explicit ElidingLabel(const QString &text, QWidget *parent = 0);
+
+    Qt::TextElideMode elideMode() const;
+    void setElideMode(const Qt::TextElideMode &elideMode);
+
+protected:
+    void paintEvent(QPaintEvent *event);
+
+private:
+    Qt::TextElideMode m_elideMode;
+};
+
+} // namespace Utils
+
+#endif // ELIDINGLABEL_H

src/libs/utils/utils-lib.pri

@@ -80,7 +80,8 @@ SOURCES += $$PWD/environment.cpp \
     $$PWD/qtcassert.cpp \
     $$PWD/elfreader.cpp \
     $$PWD/bracematcher.cpp \
-    $$PWD/proxyaction.cpp
+    $$PWD/proxyaction.cpp \
+    $$PWD/elidinglabel.cpp \
 
 win32 {
     SOURCES += \
@@ -166,7 +167,8 @@ HEADERS += \
     $$PWD/elfreader.h \
     $$PWD/bracematcher.h \
     $$PWD/proxyaction.h \
-    $$PWD/hostosinfo.h
+    $$PWD/hostosinfo.h \
+    $$PWD/elidinglabel.h
 
 FORMS += $$PWD/filewizardpage.ui \
     $$PWD/projectintropage.ui \