3 files changed, 50 insertions, 9 deletions

diff --git a/qdeduper/imageitem.cpp b/qdeduper/imageitem.cpp
index 9ee7c6f..2958e06 100644
--- a/qdeduper/imageitem.cpp
+++ b/qdeduper/imageitem.cpp
@@ -128,15 +128,18 @@ QSize ImageItemDelegate::sizeHint(const QStyleOptionViewItem &option, const QMod
     ret.setHeight(vpsz.height() / index.model()->rowCount() - lw->spacing());
     ret.setHeight(std::max(min_height + extra_height, ret.height()));
     ret.setHeight(std::min(max_height + extra_height, ret.height()));
+    if (singlemode) ret.setHeight(vpsz.height());
 #if DEBUGPAINT
     qDebug() << "sizehint" << index.row() << ret;
 #endif
     return ret;
 }
 
-void ImageItemDelegate::resize(const QModelIndex &index)
+void ImageItemDelegate::resize()
 {
-    Q_EMIT sizeHintChanged(index);
+    if (im)
+        for (int i = 0; i < im->rowCount(); ++i)
+            Q_EMIT sizeHintChanged(im->index(i, 0));
 }
 
 void ImageItemDelegate::setScrollbarMargins(int vw, int hh)
@@ -144,3 +147,20 @@ void ImageItemDelegate::setScrollbarMargins(int vw, int hh)
     this->vw = vw;
     this->hh = hh;
 }
+
+void ImageItemDelegate::set_single_item_mode(bool enabled)
+{
+    if (enabled == singlemode) return;
+    singlemode = enabled;
+    resize();
+}
+
+bool ImageItemDelegate::is_single_item_mode()
+{
+    return singlemode;
+}
+
+void ImageItemDelegate::set_model(QAbstractItemModel *m)
+{
+    im = m;
+}
diff --git a/qdeduper/imageitem.hpp b/qdeduper/imageitem.hpp
index 43fb0c8..b6d775e 100644
--- a/qdeduper/imageitem.hpp
+++ b/qdeduper/imageitem.hpp
@@ -3,6 +3,7 @@
 
 #include <QStandardItem>
 #include <QAbstractItemDelegate>
+#include <QAbstractItemModel>
 #include <QStyleOptionViewItem>
 #include <QModelIndex>
 
@@ -30,11 +31,18 @@ private:
     const static int HKSHDS = 2;
     int vw = -1;
     int hh = -1;
+    bool singlemode = false;
+    QAbstractItemModel *im = nullptr;
 public:
     void paint(QPainter *painter, const QStyleOptionViewItem &option, const QModelIndex &index) const;
     QSize sizeHint(const QStyleOptionViewItem &option, const QModelIndex &index) const;
-    void resize(const QModelIndex &index);
+    void resize();
     void setScrollbarMargins(int vw, int hh);
+
+    void set_single_item_mode(bool enabled);
+    bool is_single_item_mode();
+
+    void set_model(QAbstractItemModel *m);
 Q_SIGNALS:
     void sizeHintChanged(const QModelIndex &index);
 };
diff --git a/qdeduper/mingui.cpp b/qdeduper/mingui.cpp
index f93fda3..29cf416 100644
--- a/qdeduper/mingui.cpp
+++ b/qdeduper/mingui.cpp
@@ -16,6 +16,7 @@
 #include <QMouseEvent>
 #include <QScrollBar>
 #include <QToolBar>
+#include <QTimer>
 #include <QMenuBar>
 #include <QMenu>
 #include <QAction>
@@ -95,6 +96,7 @@ DeduperMainWindow::DeduperMainWindow()
     id = new ImageItemDelegate();
     id->setScrollbarMargins(lv->verticalScrollBar()->width(),
                             lv->horizontalScrollBar()->height());
+    id->set_model(im);
     lv->setItemDelegate(id);
     lv->setSelectionMode(QAbstractItemView::SelectionMode::NoSelection);
     lv->setResizeMode(QListView::ResizeMode::Adjust);
@@ -131,7 +133,21 @@ DeduperMainWindow::DeduperMainWindow()
         QAction *sa = new QAction();
         sa->setShortcut(QKeySequence(Qt::Modifier::SHIFT | k));
         QObject::connect(sa, &QAction::triggered, std::bind(&DeduperMainWindow::mark_all_but, this, i));
-        selhk.push_back(a);
+        selhk.push_back(sa);
+        QAction *ca = new QAction();
+        ca->setShortcut(QKeySequence(Qt::Modifier::CTRL | k));
+        QObject::connect(ca, &QAction::triggered, [this, i] {
+            if (i >= im->rowCount()) return;
+            if (id->is_single_item_mode())
+                id->set_single_item_mode(false);
+            else
+            {
+                id->set_single_item_mode(true);
+                QTimer::singleShot(5, [this, i] {
+                lv->scrollTo(im->index(i, 0), QAbstractItemView::ScrollHint::PositionAtTop);});
+            }
+        });
+        selhk.push_back(ca);
     }
     this->addActions(selhk);
 
@@ -656,11 +672,8 @@ bool DeduperMainWindow::eventFilter(QObject *obj, QEvent *e)
 {
     if (e->type() == QEvent::Type::Resize)
     {
-        if (im && id && obj == lv)
-            for (int i = 0; i < im->rowCount(); ++i)
-            {
-                id->resize(im->indexFromItem(im->item(i)));
-            }
+        if (id && obj == lv)
+            id->resize();
         return false;
     }
     return false;