From 039932ae54a5c62cce52d7a94b10b241e2649b8f Mon Sep 17 00:00:00 2001
From: Stefan Wildemann <gta04@metalstrolche.de>
Date: Thu, 8 Jun 2017 00:38:21 +0200
Subject: fix: graphics_qt5 fix layer drawing and dragging

Now cursor is drawn right with qml and qwidgets
---
 navit/graphics/qt5/QNavitWidget.cpp |  4 ++--
 navit/graphics/qt5/graphics_qt5.cpp | 43 ++++++++++++++++++++++++++++---------
 2 files changed, 35 insertions(+), 12 deletions(-)

diff --git a/navit/graphics/qt5/QNavitWidget.cpp b/navit/graphics/qt5/QNavitWidget.cpp
index 621114352..5a5bd303b 100644
--- a/navit/graphics/qt5/QNavitWidget.cpp
+++ b/navit/graphics/qt5/QNavitWidget.cpp
@@ -88,8 +88,8 @@ void QNavitWidget::paintEvent(QPaintEvent* event)
         painter.setPen(*graphics_priv->background_graphics_gc_priv->pen);
         painter.fillRect(event->rect(), *graphics_priv->background_graphics_gc_priv->brush);
     }
-    painter.drawPixmap(graphics_priv->scroll_x, graphics_priv->scroll_y, *graphics_priv->pixmap,
-        event->rect().x(), event->rect().y(),
+    painter.drawPixmap(event->rect().x(), event->rect().y(), *graphics_priv->pixmap,
+        event->rect().x() - graphics_priv->scroll_x, event->rect().y() - graphics_priv->scroll_y,
         event->rect().width(), event->rect().height());
     paintOverlays(&painter, graphics_priv, event);
 }
diff --git a/navit/graphics/qt5/graphics_qt5.cpp b/navit/graphics/qt5/graphics_qt5.cpp
index 617cc3110..f7ac15f43 100644
--- a/navit/graphics/qt5/graphics_qt5.cpp
+++ b/navit/graphics/qt5/graphics_qt5.cpp
@@ -576,25 +576,48 @@ draw_image(struct graphics_priv* gr, struct graphics_gc_priv* fg, struct point*
 }
 
 /**
- * @brief	Enable drag offset for layer.
+ * @brief	Drag layer.
  * @param   gr private handle
- * @param	p	vector the bitmap is moved from base to start drag, or NULL to indicate end of drag
+ * @param	p	vector the bitmap is moved from base, or NULL to indicate 0:0 vector
  *
- * Enable drag offset for layer. Dragging the screen will be
- * done this way if drag_bitmap is enabled. This is called with
- * a vector given in p to start the drag, and as long as the
- * drag is active. It is called with NULL to end drag.
+ * Move layer to new position. If drag_bitmap is enabled this may also be
+ * called for root layer. There the content of the root layer is to be moved
+ * by given vector. On root layer, NULL indicates the end of a drag.
  */
 static void draw_drag(struct graphics_priv* gr, struct point* p)
 {
+    struct point vector;
+
     if (p != NULL) {
         dbg(lvl_debug, "enter %p (%d,%d)\n", gr, p->x, p->y);
-        gr->scroll_x = p->x;
-        gr->scroll_y = p->y;
+        vector = *p;
     } else {
         dbg(lvl_debug, "enter %p (NULL)\n", gr);
-        gr->scroll_x = 0;
-        gr->scroll_y = 0;
+        vector.x = 0;
+        vector.y = 0;
+    }
+    if (gr->root) {
+        gr->scroll_x = vector.x;
+        gr->scroll_y = vector.y;
+    } else {
+#if USE_QWIDGET
+        int damage_x = gr->x;
+        int damage_y = gr->y;
+        int damage_w = gr->pixmap->width();
+        int damage_h = gr->pixmap->height();
+#endif
+        gr->x = vector.x;
+        gr->y = vector.y;
+#if USE_QWIDGET
+        /* call repaint on widget for stale area. */
+        if (gr->widget != NULL)
+            gr->widget->repaint(damage_x, damage_y, damage_w, damage_h);
+#endif
+#if USE_QML
+// No need to emit update, as QNavitQuic always repaints everything.
+//    if (gr->GPriv != NULL)
+//        gr->GPriv->emit_update();
+#endif
     }
 }
 
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