Preferences: Add default implementation for filtering

The default "matches" method now takes the widget and looks for all
child labels, checkboxes, push buttons and group boxes.
Because of that, the former "createWidget" method
can be called multiple times without creating a new widget
(-->widget()), and the "finished" method must ensure that the created
widget gets deleted, since not all widgets that were created are added
to the UI anymore.

Change-Id: Ia231c7c78dd8819146668e6447d36d22e7836904
Reviewed-by: Eike Ziller <eike.ziller@digia.com>

src/plugins/ios/iossettingspage.cpp

@@ -48,16 +48,10 @@ IosSettingsPage::IosSettingsPage(QObject *parent)
     setCategoryIcon(QLatin1String(Constants::IOS_SETTINGS_CATEGORY_ICON));
 }
 
-bool IosSettingsPage::matches(const QString &searchKeyWord) const
+QWidget *IosSettingsPage::widget()
 {
-    return m_keywords.contains(searchKeyWord, Qt::CaseInsensitive);
-}
-
-QWidget *IosSettingsPage::createPage(QWidget *parent)
-{
-    m_widget = new IosSettingsWidget(parent);
-    if (m_keywords.isEmpty())
-        m_keywords = m_widget->searchKeywords();
+    if (!m_widget)
+        m_widget = new IosSettingsWidget;
     return m_widget;
 }
 
@@ -69,6 +63,7 @@ void IosSettingsPage::apply()
 
 void IosSettingsPage::finish()
 {
+    delete m_widget;
 }
 
 } // namespace Internal

src/plugins/ios/iossettingspage.h

@@ -31,6 +31,8 @@
 
 #include <coreplugin/dialogs/ioptionspage.h>
 
+#include <QPointer>
+
 namespace Ios {
 namespace Internal {
 
@@ -43,14 +45,12 @@ class IosSettingsPage : public Core::IOptionsPage
 public:
     explicit IosSettingsPage(QObject *parent = 0);
 
-    bool matches(const QString &searchKeyWord) const;
-    QWidget *createPage(QWidget *parent);
+    QWidget *widget();
     void apply();
     void finish();
 
 private:
-    QString m_keywords;
-    IosSettingsWidget *m_widget;
+    QPointer<IosSettingsWidget> m_widget;
 };
 
 } // namespace Internal

src/plugins/ios/iossettingswidget.cpp

@@ -65,14 +65,6 @@ IosSettingsWidget::~IosSettingsWidget()
     delete m_ui;
 }
 
-QString IosSettingsWidget::searchKeywords() const
-{
-    QString rc;
-    QTextStream(&rc) << m_ui->deviceAskCheckBox->text();
-    rc.remove(QLatin1Char('&'));
-    return rc;
-}
-
 void IosSettingsWidget::initGui()
 {
     m_ui->setupUi(this);

src/plugins/ios/iossettingswidget.h

@@ -48,11 +48,10 @@ class IosSettingsWidget : public QWidget
     Q_OBJECT
 public:
     // Todo: This would be so much simpler if it just used Utils::PathChooser!!!
-    IosSettingsWidget(QWidget *parent);
+    IosSettingsWidget(QWidget *parent = 0);
     ~IosSettingsWidget();
 
     void saveSettings();
-    QString searchKeywords() const;
 
 private slots: