Utils: Add StringListAspect editor

Change-Id: I0d6713f75967fb56132f89772aa48fa1de2368af
Reviewed-by: hjk <hjk@qt.io>

src/libs/utils/aspects.cpp

@@ -20,6 +20,7 @@
 #include "variablechooser.h"
 
 #include <QAction>
+#include <QApplication>
 #include <QButtonGroup>
 #include <QCheckBox>
 #include <QComboBox>
@@ -38,6 +39,8 @@
 #include <QSettings>
 #include <QSpinBox>
 #include <QStandardItemModel>
+#include <QStringListModel>
+#include <QStyledItemDelegate>
 #include <QTextEdit>
 #include <QUndoStack>
 
@@ -899,6 +902,7 @@ public:
 class StringListAspectPrivate
 {
 public:
+    UndoableValue<QStringList> undoable;
 };
 
 class FilePathListAspectPrivate
@@ -2392,13 +2396,94 @@ StringListAspect::StringListAspect(AspectContainer *container)
 */
 StringListAspect::~StringListAspect() = default;
 
-/*!
-    \reimp
-*/
+class StringListDelegate : public QStyledItemDelegate
+{
+public:
+    void paint(QPainter *painter,
+               const QStyleOptionViewItem &option,
+               const QModelIndex &index) const override
+    {
+        QStyleOptionViewItem opt = option;
+        initStyleOption(&opt, index);
+        if (opt.text.isEmpty()) {
+            opt.state &= ~QStyle::State_Enabled;
+            opt.state &= ~QStyle::State_Selected;
+            opt.text = Tr::tr("Double click to add new entry ...");
+        }
+
+        const QWidget *widget = opt.widget;
+        QStyle *style = widget ? widget->style() : QApplication::style();
+        style->drawControl(QStyle::CE_ItemViewItem, &opt, painter, widget);
+
+        if (opt.state & QStyle::State_Selected) {
+            Utils::Icons::EDIT_CLEAR.icon().paint(painter,
+                                                  opt.rect.adjusted(0, 2, -2, -2),
+                                                  Qt::AlignRight | Qt::AlignVCenter);
+        }
+    }
+
+    bool eventFilter(QObject *object, QEvent *event) override
+    {
+        return QStyledItemDelegate::eventFilter(object, event);
+    }
+
+    bool editorEvent(QEvent *event,
+                     QAbstractItemModel *model,
+                     const QStyleOptionViewItem &option,
+                     const QModelIndex &index) override
+    {
+        if (event->type() == QEvent::MouseButtonRelease) {
+            auto mouseEvent = static_cast<QMouseEvent *>(event);
+            QRect r = option.rect;
+            r.setLeft(option.rect.width() - option.rect.height());
+            r.setRight(option.rect.width());
+            if (r.contains(mouseEvent->pos())) {
+                removeCallback(index.row());
+                return true;
+            }
+        }
+        return QStyledItemDelegate::editorEvent(event, model, option, index);
+    }
+
+    std::function<void(int index)> removeCallback;
+};
+
 void StringListAspect::addToLayout(LayoutItem &parent)
 {
-    Q_UNUSED(parent)
-    // TODO - when needed.
+    QListView *listView = new QListView();
+    listView->setMaximumHeight(100);
+    listView->setMinimumHeight(100);
+    listView->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Expanding);
+    auto delegate = new StringListDelegate;
+    listView->setItemDelegate(delegate);
+
+    registerSubWidget(listView);
+
+    QStringListModel *model = new QStringListModel(listView);
+    model->setStringList(value() << "");
+
+    connect(&d->undoable.m_signal, &UndoSignaller::changed, model, [model, this] {
+        model->setStringList(d->undoable.get() << "");
+    });
+
+    connect(model, &QStringListModel::dataChanged, [this, model] {
+        QStringList newList = model->stringList();
+        newList.removeIf([](const QString &s) { return s.isEmpty(); });
+        pushUndo(d->undoable.set(newList));
+        handleGuiChanged();
+    });
+
+    delegate->removeCallback = [this, model](int index) {
+        QStringList newList = model->stringList();
+        newList.removeAt(index);
+        newList.removeIf([](const QString &s) { return s.isEmpty(); });
+        pushUndo(d->undoable.set(newList));
+        handleGuiChanged();
+    };
+
+    listView->setModel(model);
+
+    parent.addItem(listView);
 }
 
 void StringListAspect::appendValue(const QString &s, bool allowDuplicates)
@@ -2434,6 +2519,21 @@ void StringListAspect::removeValues(const QStringList &values)
     setValue(val);
 }
 
+bool StringListAspect::guiToBuffer()
+{
+    const QStringList newValue = d->undoable.get();
+    if (newValue != m_buffer) {
+        m_buffer = newValue;
+        return true;
+    }
+    return false;
+}
+
+void StringListAspect::bufferToGui()
+{
+    d->undoable.setWithoutUndo(m_buffer);
+}
+
 /*!
     \class Utils::FilePathListAspect
     \inmodule QtCreator