Cpp include hierarchy: Add drag & drop onto editor splits

Change-Id: If6d7acb362433814dd73819ec224249f05ab9dcd
Reviewed-by: Daniel Teske <daniel.teske@digia.com>

src/plugins/cppeditor/cppincludehierarchy.cpp

@@ -57,34 +57,6 @@ using namespace Utils;
 namespace CppEditor {
 namespace Internal {
 
-class CppIncludeLabel : public QLabel
-{
-public:
-    CppIncludeLabel(QWidget *parent)
-        : QLabel(parent)
-    {}
-
-    void setup(const QString &fileName, const QString &filePath)
-    {
-        setText(fileName);
-        m_link = CppEditorWidget::Link(filePath);
-    }
-
-private:
-    void mousePressEvent(QMouseEvent *)
-    {
-        if (!m_link.hasValidTarget())
-            return;
-
-        Core::EditorManager::openEditorAt(m_link.targetFileName,
-                                          m_link.targetLine,
-                                          m_link.targetColumn,
-                                          Constants::CPPEDITOR_ID);
-    }
-
-    CppEditorWidget::Link m_link;
-};
-
 // CppIncludeHierarchyWidget
 CppIncludeHierarchyWidget::CppIncludeHierarchyWidget() :
     QWidget(0),
@@ -94,7 +66,7 @@ CppIncludeHierarchyWidget::CppIncludeHierarchyWidget() :
     m_includeHierarchyInfoLabel(0),
     m_editor(0)
 {
-    m_inspectedFile = new CppIncludeLabel(this);
+    m_inspectedFile = new TextEditorLinkLabel(this);
     m_inspectedFile->setMargin(5);
     m_model = new CppIncludeHierarchyModel(this);
     m_treeView = new CppIncludeHierarchyTreeView(this);
@@ -150,8 +122,8 @@ void CppIncludeHierarchyWidget::perform()
     if (m_model->isEmpty())
         return;
 
-    m_inspectedFile->setup(widget->textDocument()->displayName(),
+    m_inspectedFile->setText(widget->textDocument()->displayName());
-                           widget->textDocument()->filePath());
+    m_inspectedFile->setLink(TextEditorWidget::Link(widget->textDocument()->filePath()));
 
     //expand "Includes"
     m_treeView->expand(m_model->index(0, 0));

src/plugins/cppeditor/cppincludehierarchy.h

@@ -45,7 +45,11 @@ class QLabel;
 QT_END_NAMESPACE
 
 namespace Core { class IEditor; }
-namespace TextEditor { class BaseTextEditor; }
+
+namespace TextEditor {
+class BaseTextEditor;
+class TextEditorLinkLabel;
+}
 
 namespace Utils {
 class AnnotatedItemDelegate;
@@ -58,7 +62,6 @@ namespace Internal {
 class CppEditor;
 class CppEditorWidget;
 class CppInclude;
-class CppIncludeLabel;
 class CppIncludeHierarchyModel;
 class CppIncludeHierarchyTreeView;
 
@@ -84,7 +87,7 @@ private:
     CppIncludeHierarchyTreeView *m_treeView;
     CppIncludeHierarchyModel *m_model;
     Utils::AnnotatedItemDelegate *m_delegate;
-    CppIncludeLabel *m_inspectedFile;
+    TextEditor::TextEditorLinkLabel *m_inspectedFile;
     QLabel *m_includeHierarchyInfoLabel;
     TextEditor::BaseTextEditor *m_editor;
 };

src/plugins/cppeditor/cppincludehierarchymodel.cpp

@@ -39,6 +39,7 @@
 #include <texteditor/texteditor.h>
 
 #include <cplusplus/CppDocument.h>
+#include <utils/fileutils.h>
 
 #include <QSet>
 
@@ -241,6 +242,37 @@ bool CppIncludeHierarchyModel::hasChildren(const QModelIndex &parent) const
     return parentItem->hasChildren();
 }
 
+Qt::ItemFlags CppIncludeHierarchyModel::flags(const QModelIndex &index) const
+{
+    const TextEditor::TextEditorWidget::Link link
+            = index.data(LinkRole).value<TextEditor::TextEditorWidget::Link>();
+    if (link.hasValidTarget())
+        return Qt::ItemIsDragEnabled | Qt::ItemIsEnabled | Qt::ItemIsSelectable;
+    return Qt::ItemIsEnabled | Qt::ItemIsSelectable;
+}
+
+Qt::DropActions CppIncludeHierarchyModel::supportedDragActions() const
+{
+    return Qt::MoveAction;
+}
+
+QStringList CppIncludeHierarchyModel::mimeTypes() const
+{
+    return Utils::FileDropSupport::mimeTypesForFilePaths();
+}
+
+QMimeData *CppIncludeHierarchyModel::mimeData(const QModelIndexList &indexes) const
+{
+    auto data = new Utils::FileDropMimeData;
+    foreach (const QModelIndex &index, indexes) {
+        const TextEditor::TextEditorWidget::Link link
+                = index.data(LinkRole).value<TextEditor::TextEditorWidget::Link>();
+        if (link.hasValidTarget())
+            data->addFile(link.targetFileName, link.targetLine, link.targetColumn);
+    }
+    return data;
+}
+
 bool CppIncludeHierarchyModel::isEmpty() const
 {
     return !m_includesItem->hasChildren() && !m_includedByItem->hasChildren();

src/plugins/cppeditor/cppincludehierarchymodel.h

@@ -66,6 +66,11 @@ public:
     void fetchMore(const QModelIndex &parent);
     bool canFetchMore(const QModelIndex &parent) const;
     bool hasChildren(const QModelIndex &parent) const;
+    Qt::ItemFlags flags(const QModelIndex &index) const;
+
+    Qt::DropActions supportedDragActions() const;
+    QStringList mimeTypes() const;
+    QMimeData *mimeData(const QModelIndexList &indexes) const;
 
     void clear();
     void buildHierarchy(TextEditor::BaseTextEditor *editor, const QString &filePath);

src/plugins/cppeditor/cppincludehierarchytreeview.cpp

@@ -38,6 +38,8 @@ namespace Internal {
 CppIncludeHierarchyTreeView::CppIncludeHierarchyTreeView(QWidget *parent/* = 0*/)
     : NavigationTreeView(parent)
 {
+    setDragEnabled(true);
+    setDragDropMode(QAbstractItemView::DragOnly);
 }
 
 void CppIncludeHierarchyTreeView::keyPressEvent(QKeyEvent *event)