comparison changesetitem.cpp @ 281:9162f14c5ab7

* Change "diff to parent <id>" menu entries in changeset item right-button menu to "diff to left parent" and "diff to right parent"

     License, or (at your option) any later version.  See the file
     COPYING included with this distribution for more information.
 */
 
 #include "changesetitem.h"
+#include "changesetscene.h"
 #include "changesetdetailitem.h"
 #include "changeset.h"
 #include "textabbrev.h"
 #include "colourset.h"
 #include "debug.h"

     QAction *copyId = menu->addAction(tr("Copy identifier to clipboard"));
     connect(copyId, SIGNAL(triggered()), this, SLOT(copyIdActivated()));
 
     menu->addSeparator();
 
-    if (m_changeset->parents().size() > 1) {
-
-        foreach (QString parentId, m_changeset->parents()) {
-            QAction *diffParent =
-                menu->addAction(tr("Diff to parent %1")
-                                .arg(Changeset::hashOf(parentId)));
+    QStringList parents = m_changeset->parents();
+
+    if (parents.size() > 1) {
+
+        QString leftId, rightId;
+        ChangesetScene *cs = dynamic_cast<ChangesetScene *>(scene());
+        bool havePositions = false;
+
+        if (cs && parents.size() == 2) {
+            ChangesetItem *i0 = cs->getItemById(parents[0]);
+            ChangesetItem *i1 = cs->getItemById(parents[1]);
+            if (i0 && i1) {
+                if (i0->x() < i1->x()) {
+                    leftId = parents[0];
+                    rightId = parents[1];
+                } else {
+                    leftId = parents[1];
+                    rightId = parents[0];
+                }
+                havePositions = true;
+            }
+        }
+
+        if (havePositions) {
+            
+            QAction *diffParent = menu->addAction(tr("Diff to left parent"));
             connect(diffParent, SIGNAL(triggered()),
                     this, SLOT(diffToParentActivated()));
-            m_parentDiffActions[diffParent] = parentId;
+            m_parentDiffActions[diffParent] = leftId;
+            
+            diffParent = menu->addAction(tr("Diff to right parent"));
+            connect(diffParent, SIGNAL(triggered()),
+                    this, SLOT(diffToParentActivated()));
+            m_parentDiffActions[diffParent] = rightId;
+
+        } else {
+
+            foreach (QString parentId, parents) {
+                QString text = tr("Diff to parent %1")
+                    .arg(Changeset::hashOf(parentId));
+                QAction *diffParent = menu->addAction(text);
+                connect(diffParent, SIGNAL(triggered()),
+                        this, SLOT(diffToParentActivated()));
+                m_parentDiffActions[diffParent] = parentId;
+            }
         }
 
     } else {
 
         QAction *diffParent =