n mSize property in fontproxy: like em for css

declarativeimports/core/theme.cpp

@@ -64,6 +64,8 @@ FontProxy::FontProxy(Plasma::Theme::FontRole role, QObject *parent)
             this, SIGNAL(weightChanged()));
     connect(Plasma::Theme::defaultTheme(), SIGNAL(themeChanged()),
             this, SIGNAL(wordSpacingChanged()));
+    connect(Plasma::Theme::defaultTheme(), SIGNAL(themeChanged()),
+            this, SIGNAL(mSizeChanged()));
 }
 
 FontProxy::~FontProxy()
@@ -140,6 +142,10 @@ qreal FontProxy::wordSpacing() const
     return Plasma::Theme::defaultTheme()->font(m_fontRole).wordSpacing();
 }
 
+QSize FontProxy::mSize() const
+{
+    return QFontMetrics(Plasma::Theme::defaultTheme()->font(m_fontRole)).boundingRect("M").size();
+}
 
 
 //********** Theme *************

declarativeimports/core/theme.h

@@ -41,6 +41,7 @@ class FontProxy : public QObject
     Q_PROPERTY(bool underline READ underline NOTIFY underlineChanged )
     Q_PROPERTY(Weight weight READ weight NOTIFY weightChanged )
     Q_PROPERTY(qreal wordSpacing READ wordSpacing NOTIFY wordSpacingChanged )
+    Q_PROPERTY(QSize mSize READ mSize NOTIFY mSizeChanged )
 
     Q_ENUMS(Capitalization)
     Q_ENUMS(Weight)
@@ -80,6 +81,11 @@ public:
     Weight weight() const;
     qreal wordSpacing() const;
 
+    /**
+     * @return The size of an uppercase M in this font
+     */
+    QSize mSize() const;
+
 Q_SIGNALS:
     void boldChanged();
     void capitalizationChanged();
@@ -92,6 +98,7 @@ Q_SIGNALS:
     void underlineChanged();
     void weightChanged();
     void wordSpacingChanged();
+    void mSizeChanged();
 
 private:
     Plasma::Theme::FontRole m_fontRole;

declarativeimports/plasmacomponents/qml/AppManager.js

@@ -0,0 +1,85 @@
+/****************************************************************************
+**
+** 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 Components project.
+**
+** $QT_BEGIN_LICENSE:BSD$
+** You may use this file under the terms of the BSD license as follows:
+**
+** "Redistribution and use in source and binary forms, with or without
+** modification, are permitted provided that the following conditions are
+** met:
+**   * Redistributions of source code must retain the above copyright
+**     notice, this list of conditions and the following disclaimer.
+**   * Redistributions in binary form must reproduce the above copyright
+**     notice, this list of conditions and the following disclaimer in
+**     the documentation and/or other materials provided with the
+**     distribution.
+**   * Neither the name of Nokia Corporation and its Subsidiary(-ies) nor
+**     the names of its contributors may be used to endorse or promote
+**     products derived from this software without specific prior written
+**     permission.
+**
+** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+function rootObject() {
+    var next = parent
+    while (next && next.parent)
+        next = next.parent
+    return next
+}
+
+function findParent(child, propertyName) {
+    if (!child)
+        return null
+    var next = child.parent
+    while (next && !next.hasOwnProperty(propertyName))
+        next = next.parent
+    return next
+}
+
+function sceneX(item) {
+    // Binding may cause that this function is evaluated even when item is undefined,
+    // but in that case the Binding isn't active however so we can safely return 0
+    var x = 0
+    if (item) {
+        x = item.x
+        var p = item.parent
+        while (p) {
+            x += p.x
+            p = p.parent
+        }
+    }
+    return x
+}
+
+function sceneY(item) {
+    // Binding may cause that this function is evaluated even when item is undefined,
+    // but in that case the Binding isn't active however so we can safely return 0
+    var y = 0
+    if (item) {
+        y = item.y
+        var p = item.parent
+        while (p) {
+            y += p.y
+            p = p.parent
+        }
+    }
+    return y
+}