Add option to turn antialiasing on/off for text editor fonts.

Reviewed-by: Thorbjørn Lindeijer <thorbjorn.lindeijer@nokia.com>
Task-number: 234394

src/plugins/texteditor/fontsettings.cpp

@@ -37,10 +37,13 @@
 
 static const char *fontFamilyKey = "FontFamily";
 static const char *fontSizeKey = "FontSize";
+static const char *antialiasKey = "FontAntialias";
 static const char *trueString = "true";
 static const char *falseString = "false";
 
 namespace {
+static const bool DEFAULT_ANTIALIAS = true;
+
 #ifdef Q_WS_MAC
     enum { DEFAULT_FONT_SIZE = 12 };
     static const char *DEFAULT_FONT_FAMILY = "Monaco";
@@ -135,7 +138,8 @@ bool Format::equals(const Format &f) const
 // -- FontSettings
 FontSettings::FontSettings(const FormatDescriptions &fd) :
     m_family(defaultFixedFontFamily()),
-    m_fontSize(DEFAULT_FONT_SIZE)
+    m_fontSize(DEFAULT_FONT_SIZE),
+    m_antialias(DEFAULT_ANTIALIAS)
 {
     Q_UNUSED(fd);
 }
@@ -144,6 +148,7 @@ void FontSettings::clear()
 {
     m_family = defaultFixedFontFamily();
     m_fontSize = DEFAULT_FONT_SIZE;
+    m_antialias = DEFAULT_ANTIALIAS;
     qFill(m_formats.begin(), m_formats.end(), Format());
 }
 
@@ -160,6 +165,9 @@ void FontSettings::toSettings(const QString &category,
     if (m_fontSize != DEFAULT_FONT_SIZE || s->contains(QLatin1String(fontSizeKey)))
         s->setValue(QLatin1String(fontSizeKey), m_fontSize);
 
+    if (m_antialias != DEFAULT_ANTIALIAS || s->contains(QLatin1String(antialiasKey)))
+        s->setValue(QLatin1String(antialiasKey), m_antialias);
+
     const Format defaultFormat;
 
     foreach (const FormatDescription &desc, descriptions) {
@@ -184,7 +192,8 @@ bool FontSettings::fromSettings(const QString &category,
     group += QLatin1Char('/');
 
     m_family = s->value(group + QLatin1String(fontFamilyKey), defaultFixedFontFamily()).toString();
-    m_fontSize = s->value(group + QLatin1String(QLatin1String(fontSizeKey)), m_fontSize).toInt();
+    m_fontSize = s->value(group + QLatin1String(fontSizeKey), m_fontSize).toInt();
+    m_antialias = s->value(group + QLatin1String(antialiasKey), DEFAULT_ANTIALIAS).toBool();
 
     foreach (const FormatDescription &desc, descriptions) {
         const QString name = desc.name();
@@ -203,6 +212,7 @@ bool FontSettings::equals(const FontSettings &f) const
 {
     return m_family == f.m_family
             && m_fontSize == f.m_fontSize
+            && m_antialias == f.m_antialias
             && m_formats == f.m_formats;
 }
 
@@ -213,6 +223,7 @@ QTextCharFormat FontSettings::toTextCharFormat(const QString &category) const
     if (category == QLatin1String("Text")) {
         tf.setFontFamily(m_family);
         tf.setFontPointSize(m_fontSize);
+        tf.setFontStyleStrategy(m_antialias ? QFont::PreferAntialias : QFont::NoAntialias);
     }
 
     if (f.foreground().isValid())
@@ -254,6 +265,17 @@ void FontSettings::setFontSize(int size)
     m_fontSize = size;
 }
 
+bool FontSettings::antialias() const
+{
+    return m_antialias;
+}
+
+void FontSettings::setAntialias(bool antialias)
+{
+    m_antialias = antialias;
+}
+
+
 Format &FontSettings::formatFor(const QString &category)
 {
     return m_formats[category];

src/plugins/texteditor/fontsettings.h

@@ -122,6 +122,12 @@ public:
     int fontSize() const;
     void setFontSize(int size);
 
+    /**
+     * Returns the configured antialiasing behavior.
+     */
+    bool antialias() const;
+    void setAntialias(bool antialias);
+
     /**
      * Returns the format for the given font category.
      */
@@ -135,6 +141,7 @@ public:
 private:
     QString m_family;
     int m_fontSize;
+    bool m_antialias;
     QMap<QString, Format> m_formats;
 };
 

src/plugins/texteditor/fontsettingspage.cpp

@@ -240,8 +240,11 @@ QWidget *FontSettingsPage::createPage(QWidget *parent)
     const int idx = families.indexOf(d_ptr->m_value.family());
     d_ptr->ui.familyComboBox->setCurrentIndex(idx);
 
+    d_ptr->ui.antialias->setChecked(d_ptr->m_value.antialias());
+
     connect(d_ptr->ui.familyComboBox, SIGNAL(activated(int)), this, SLOT(updatePointSizes()));
     connect(d_ptr->ui.sizeComboBox, SIGNAL(activated(int)), this, SLOT(updatePreview()));
+    connect(d_ptr->ui.antialias, SIGNAL(toggled(bool)), this, SLOT(updatePreview()));
     connect(d_ptr->ui.itemListWidget, SIGNAL(itemSelectionChanged()),
         this, SLOT(itemChanged()));
     connect(d_ptr->ui.foregroundToolButton, SIGNAL(clicked()),
@@ -389,6 +392,7 @@ void FontSettingsPage::updatePreview()
     if (currentFormat.background().isValid())
         format.setBackground(QBrush(currentFormat.background()));
     format.setFontFamily(d_ptr->ui.familyComboBox->currentText());
+    format.setFontStyleStrategy(d_ptr->ui.antialias->isChecked() ? QFont::PreferAntialias : QFont::NoAntialias);
     bool ok;
     int size = d_ptr->ui.sizeComboBox->currentText().toInt(&ok);
     if (!ok) {
@@ -436,6 +440,7 @@ void FontSettingsPage::delayedChange()
 void FontSettingsPage::apply()
 {
     d_ptr->m_value.setFamily(d_ptr->ui.familyComboBox->currentText());
+    d_ptr->m_value.setAntialias(d_ptr->ui.antialias->isChecked());
 
     bool ok = true;
     const int size = d_ptr->ui.sizeComboBox->currentText().toInt(&ok);

src/plugins/texteditor/fontsettingspage.ui

@@ -11,24 +11,12 @@
    </rect>
   </property>
   <layout class="QVBoxLayout">
-   <property name="spacing">
-    <number>6</number>
-   </property>
-   <property name="margin">
-    <number>9</number>
-   </property>
    <item>
     <widget class="QGroupBox" name="groupBox">
      <property name="title">
       <string>Font</string>
      </property>
      <layout class="QHBoxLayout">
-      <property name="spacing">
-       <number>6</number>
-      </property>
-      <property name="margin">
-       <number>9</number>
-      </property>
       <item>
        <widget class="QLabel" name="label_5">
         <property name="sizePolicy">
@@ -91,6 +79,13 @@
         </property>
        </widget>
       </item>
+      <item>
+       <widget class="QCheckBox" name="antialias">
+        <property name="text">
+         <string>Antialias</string>
+        </property>
+       </widget>
+      </item>
       <item>
        <spacer>
         <property name="orientation">
@@ -119,12 +114,6 @@
       <string>Color Scheme</string>
      </property>
      <layout class="QHBoxLayout">
-      <property name="spacing">
-       <number>6</number>
-      </property>
-      <property name="margin">
-       <number>9</number>
-      </property>
       <item>
        <widget class="QListWidget" name="itemListWidget">
         <property name="sizePolicy">
@@ -137,12 +126,6 @@
       </item>
       <item>
        <layout class="QGridLayout">
-        <property name="margin">
-         <number>0</number>
-        </property>
-        <property name="spacing">
-         <number>6</number>
-        </property>
         <item row="2" column="0">
          <widget class="QCheckBox" name="boldCheckBox">
           <property name="text">