Designer: Support alignment in box and grid layouts.

Extend ui-format by alignment-attribute for QLayoutItem,
handle it in uic and formbuilder.
Support in Designer by context menu.

Reviewed-by: Jarek Kobus <jaroslaw.kobus@nokia.com>
Task-number: QTBUG-3120

3 files changed, 96 insertions, 5 deletions

diff --git a/tools/designer/src/lib/uilib/abstractformbuilder.cpp b/tools/designer/src/lib/uilib/abstractformbuilder.cpp
index 3f40d81..ae6fac9 100644
--- a/tools/designer/src/lib/uilib/abstractformbuilder.cpp
+++ b/tools/designer/src/lib/uilib/abstractformbuilder.cpp
@@ -794,6 +794,69 @@ static inline QFormLayout::ItemRole formLayoutRole(int column, int colspan)
 }
 #endif
 
+static inline QString alignmentValue(Qt::Alignment a)
+{
+    QString h,v;
+    switch (a & Qt::AlignHorizontal_Mask) {
+    case Qt::AlignLeft:
+        h = QLatin1String("Qt::AlignLeft");
+        break;
+    case Qt::AlignRight:
+        h = QLatin1String("Qt::AlignRight");
+        break;
+    case Qt::AlignHCenter:
+        h = QLatin1String("Qt::AlignHCenter");
+        break;
+    case Qt::AlignJustify:
+        h = QLatin1String("Qt::AlignJustify");
+        break;
+    }
+    switch (a & Qt::AlignVertical_Mask) {
+    case Qt::AlignTop:
+        v = QLatin1String("Qt::AlignTop");
+        break;
+    case Qt::AlignBottom:
+        v = QLatin1String("Qt::AlignBottom");
+        break;
+    case Qt::AlignVCenter:
+        v = QLatin1String("Qt::AlignVCenter");
+        break;
+    }
+    if (h.isEmpty() && v.isEmpty())
+        return QString();
+    if (!v.isEmpty()) {
+        if (!h.isEmpty())
+            h += QLatin1Char('|');
+        h += v;
+    }
+    return h;
+}
+
+static inline Qt::Alignment alignmentFromDom(const QString &in)
+{
+    Qt::Alignment rc = 0;
+    if (!in.isEmpty()) {
+        foreach (const QString &f, in.split(QLatin1Char('|'))) {
+            if (f == QLatin1String("Qt::AlignLeft")) {
+                rc |= Qt::AlignLeft;
+            } else if (f == QLatin1String("Qt::AlignRight")) {
+                rc |= Qt::AlignRight;
+            } else if (f == QLatin1String("Qt::AlignHCenter")) {
+                rc |= Qt::AlignHCenter;
+            } else if (f == QLatin1String("Qt::AlignJustify")) {
+                rc |= Qt::AlignJustify;
+            } else if (f == QLatin1String("Qt::AlignTop")) {
+                rc |= Qt::AlignTop;
+            } else if (f == QLatin1String("Qt::AlignBottom")) {
+                rc |= Qt::AlignBottom;
+            } else if (f == QLatin1String("Qt::AlignVCenter")) {
+                rc |= Qt::AlignVCenter;
+            }
+        }
+    }
+    return rc;
+}
+
 /*!
     \internal
 */
@@ -838,12 +901,15 @@ QLayoutItem *QAbstractFormBuilder::create(DomLayoutItem *ui_layoutItem, QLayout
 {
     switch (ui_layoutItem->kind()) {
     case DomLayoutItem::Widget: {
-        if (QWidget *w = create(ui_layoutItem->elementWidget(), parentWidget))
+        if (QWidget *w = create(ui_layoutItem->elementWidget(), parentWidget)) {
 #ifdef QFORMINTERNAL_NAMESPACE // uilib
-            return new QWidgetItemV2(w);
+            QWidgetItem *item = new QWidgetItemV2(w);
 #else                         // Within Designer: Use factory method that returns special items that refuse to shrink to 0,0
-            return QLayoutPrivate::createWidgetItem(layout, w);
+            QWidgetItem *item = QLayoutPrivate::createWidgetItem(layout, w);
 #endif
+            item->setAlignment(alignmentFromDom(ui_layoutItem->attributeAlignment()));
+            return item;
+        }
         qWarning() << QCoreApplication::translate("QAbstractFormBuilder", "Empty widget item in %1 '%2'.").arg(QString::fromUtf8(layout->metaObject()->className()), layout->objectName());
         return 0;
     }
@@ -1384,13 +1450,14 @@ DomActionRef *QAbstractFormBuilder::createActionRefDom(QAction *action)
 // Struct to store layout item parameters for saving layout items
 struct FormBuilderSaveLayoutEntry {
     explicit FormBuilderSaveLayoutEntry(QLayoutItem *li = 0) :
-        item(li), row(-1), column(-1), rowSpan(0), columnSpan(0) {}
+        item(li), row(-1), column(-1), rowSpan(0), columnSpan(0), alignment(0) {}
 
     QLayoutItem *item;
     int row;
     int column;
     int rowSpan;
     int columnSpan;
+    Qt::Alignment alignment;
 };
 
 // Create list from standard box layout
@@ -1401,7 +1468,9 @@ static QList<FormBuilderSaveLayoutEntry> saveLayoutEntries(const QLayout *layout
         rc.reserve(count);
         for (int idx = 0; idx < count; ++idx) {
             QLayoutItem *item = layout->itemAt(idx);
-            rc.append(FormBuilderSaveLayoutEntry(item));
+            FormBuilderSaveLayoutEntry entry(item);
+            entry.alignment = item->alignment();
+            rc.append(entry);
         }
     }
     return rc;
@@ -1417,6 +1486,7 @@ static QList<FormBuilderSaveLayoutEntry> saveGridLayoutEntries(QGridLayout *grid
             QLayoutItem *item = gridLayout->itemAt(idx);
             FormBuilderSaveLayoutEntry entry(item);
             gridLayout->getItemPosition(idx, &entry.row, &entry.column, &entry.rowSpan,&entry.columnSpan);
+            entry.alignment = item->alignment();
             rc.append(entry);
         }
     }
@@ -1490,6 +1560,8 @@ DomLayout *QAbstractFormBuilder::createDom(QLayout *layout, DomLayout *ui_layout
                 ui_item->setAttributeRowSpan(item.rowSpan);
             if (item.columnSpan > 1)
                 ui_item->setAttributeColSpan(item.columnSpan);
+            if (item.alignment)
+                ui_item->setAttributeAlignment(alignmentValue(item.alignment));
             ui_items.append(ui_item);
         }
     }
diff --git a/tools/designer/src/lib/uilib/ui4.cpp b/tools/designer/src/lib/uilib/ui4.cpp
index 98974e6..2b5fe8b 100644
--- a/tools/designer/src/lib/uilib/ui4.cpp
+++ b/tools/designer/src/lib/uilib/ui4.cpp
@@ -3673,6 +3673,7 @@ void DomLayoutItem::clear(bool clear_all)
     m_attr_rowSpan = 0;
     m_has_attr_colSpan = false;
     m_attr_colSpan = 0;
+    m_has_attr_alignment = false;
     }
 
     m_kind = Unknown;
@@ -3694,6 +3695,7 @@ DomLayoutItem::DomLayoutItem()
     m_attr_rowSpan = 0;
     m_has_attr_colSpan = false;
     m_attr_colSpan = 0;
+    m_has_attr_alignment = false;
     m_widget = 0;
     m_layout = 0;
     m_spacer = 0;
@@ -3727,6 +3729,10 @@ void DomLayoutItem::read(QXmlStreamReader &reader)
             setAttributeColSpan(attribute.value().toString().toInt());
             continue;
         }
+        if (name == QLatin1String("alignment")) {
+            setAttributeAlignment(attribute.value().toString());
+            continue;
+        }
         reader.raiseError(QLatin1String("Unexpected attribute ") + name.toString());
     }
 
@@ -3779,6 +3785,8 @@ void DomLayoutItem::read(const QDomElement &node)
         setAttributeRowSpan(node.attribute(QLatin1String("rowspan")).toInt());
     if (node.hasAttribute(QLatin1String("colspan")))
         setAttributeColSpan(node.attribute(QLatin1String("colspan")).toInt());
+    if (node.hasAttribute(QLatin1String("alignment")))
+        setAttributeAlignment(node.attribute(QLatin1String("alignment")));
 
     for (QDomNode n = node.firstChild(); !n.isNull(); n = n.nextSibling()) {
         if (!n.isElement())
@@ -3828,6 +3836,9 @@ void DomLayoutItem::write(QXmlStreamWriter &writer, const QString &tagName) cons
     if (hasAttributeColSpan())
         writer.writeAttribute(QLatin1String("colspan"), QString::number(attributeColSpan()));
 
+    if (hasAttributeAlignment())
+        writer.writeAttribute(QLatin1String("alignment"), attributeAlignment());
+
     switch (kind()) {
         case Widget: {
             DomWidget* v = elementWidget();
diff --git a/tools/designer/src/lib/uilib/ui4_p.h b/tools/designer/src/lib/uilib/ui4_p.h
index a464a89..836175e 100644
--- a/tools/designer/src/lib/uilib/ui4_p.h
+++ b/tools/designer/src/lib/uilib/ui4_p.h
@@ -1427,6 +1427,11 @@ public:
     inline void setAttributeColSpan(int a) { m_attr_colSpan = a; m_has_attr_colSpan = true; }
     inline void clearAttributeColSpan() { m_has_attr_colSpan = false; }
 
+    inline bool hasAttributeAlignment() const { return m_has_attr_alignment; }
+    inline QString attributeAlignment() const { return m_attr_alignment; }
+    inline void setAttributeAlignment(const QString& a) { m_attr_alignment = a; m_has_attr_alignment = true; }
+    inline void clearAttributeAlignment() { m_has_attr_alignment = false; }
+
     // child element accessors
     enum Kind { Unknown = 0, Widget, Layout, Spacer };
     inline Kind kind() const { return m_kind; }
@@ -1460,6 +1465,9 @@ private:
     int m_attr_colSpan;
     bool m_has_attr_colSpan;
 
+    QString m_attr_alignment;
+    bool m_has_attr_alignment;
+
     // child element data
     Kind m_kind;
     DomWidget* m_widget;