Index: sources/gui/qml/components/IconButton.qml
===================================================================
diff -u -rca05e940ea4a0c567acb05c4c8777dea079b0f08 -r29331d6ae2d7af814a0f4a7a37390877a54f516d
--- sources/gui/qml/components/IconButton.qml	(.../IconButton.qml)	(revision ca05e940ea4a0c567acb05c4c8777dea079b0f08)
+++ sources/gui/qml/components/IconButton.qml	(.../IconButton.qml)	(revision 29331d6ae2d7af814a0f4a7a37390877a54f516d)
@@ -30,6 +30,14 @@
     radius      : height
     border.color: "transparent"
 
+    signal hold()
+
+    onPressed   : _repeatTimer.start()
+    onReleased  : _repeatTimer.stop()
+    onCanceled  : _repeatTimer.stop()
+
+    onActiveFocusChanged: if ( ! activeFocus ) _repeatTimer.stop()
+
     Image { id  : _iconImage
         anchors.centerIn: parent
         height  : iconSize
@@ -39,4 +47,20 @@
         smooth: true
         mipmap: true
     }
+
+    Timer { id: _repeatTimer
+        interval    : 200
+        repeat      : true
+
+        onTriggered: {
+            hold()
+            interval = Math.max(50, interval - 10) // accelerate
+        }
+
+        onRunningChanged: {
+            if ( ! running )
+                interval = 200 // reset when released
+        }
+    }
+
 }