If item's rect is bigger than view's rect ensureVisible works very unstable.

(grafted from d807a6fc7a9c1abc588dfda621ac7b70f90b401b)

--HG--
branch : develop

src/libs/vtools/tools/drawTools/toolpoint/toolsinglepoint/vtoolbasepoint.cpp

@@ -145,7 +145,26 @@ QVariant VToolBasePoint::itemChange(QGraphicsItem::GraphicsItemChange change, co
             {
                 if (QGraphicsView *view = viewList.at(0))
                 {
-                    view->ensureVisible(this);
+                    const int xmargin = 50;
+                    const int ymargin = 50;
+
+                    const QRectF viewRect = VMainGraphicsView::SceneVisibleArea(view);
+                    const QRectF itemRect = mapToScene(boundingRect()).boundingRect();
+
+                    // If item's rect is bigger than view's rect ensureVisible works very unstable.
+                    if (itemRect.height() + 2*ymargin < viewRect.height() &&
+                        itemRect.width() + 2*xmargin < viewRect.width())
+                    {
+                         view->ensureVisible(itemRect, xmargin, ymargin);
+                    }
+                    else
+                    {
+                        // Ensure visible only small rect around a cursor
+                        VMainGraphicsScene *currentScene = qobject_cast<VMainGraphicsScene *>(scene());
+                        SCASSERT(currentScene);
+                        const QPointF cursorPosition = currentScene->getScenePos();
+                        view->ensureVisible(QRectF(cursorPosition.x()-5, cursorPosition.y()-5, 10, 10));
+                    }
                 }
             }
             changeFinished = true;

src/libs/vtools/tools/vtooldetail.cpp

@@ -31,6 +31,7 @@
 #include "../vgeometry/varc.h"
 #include "../vgeometry/vsplinepath.h"
 #include "../vwidgets/vmaingraphicsscene.h"
+#include "../vwidgets/vmaingraphicsview.h"
 #include "../dialogs/tools/dialogtool.h"
 #include "../dialogs/tools/dialogdetail.h"
 #include "../undocommands/savedetailoptions.h"
@@ -367,7 +368,26 @@ QVariant VToolDetail::itemChange(QGraphicsItem::GraphicsItemChange change, const
                {
                    if (QGraphicsView *view = viewList.at(0))
                    {
-                   view->ensureVisible(mapToScene(boundingRect()|childrenBoundingRect()).boundingRect());
+                       const int xmargin = 50;
+                       const int ymargin = 50;
+
+                       const QRectF viewRect = VMainGraphicsView::SceneVisibleArea(view);
+                       const QRectF itemRect = mapToScene(boundingRect()|childrenBoundingRect()).boundingRect();
+
+                       // If item's rect is bigger than view's rect ensureVisible works very unstable.
+                       if (itemRect.height() + 2*ymargin < viewRect.height() &&
+                           itemRect.width() + 2*xmargin < viewRect.width())
+                       {
+                            view->ensureVisible(itemRect, xmargin, ymargin);
+                       }
+                       else
+                       {
+                           // Ensure visible only small rect around a cursor
+                           VMainGraphicsScene *currentScene = qobject_cast<VMainGraphicsScene *>(scene());
+                           SCASSERT(currentScene);
+                           const QPointF cursorPosition = currentScene->getScenePos();
+                           view->ensureVisible(QRectF(cursorPosition.x()-5, cursorPosition.y()-5, 10, 10));
+                       }
                    }
                }
                // Don't forget to update geometry, because first change never call full parse

src/libs/vwidgets/vcontrolpointspline.cpp

@@ -33,6 +33,9 @@
 #include <QPen>
 #include <QStyleOptionGraphicsItem>
 
+#include "vmaingraphicsview.h"
+#include "vmaingraphicsscene.h"
+
 //---------------------------------------------------------------------------------------------------------------------
 /**
  * @brief VControlPointSpline constructor.
@@ -137,7 +140,26 @@ QVariant VControlPointSpline::itemChange(QGraphicsItem::GraphicsItemChange chang
                 {
                     if (QGraphicsView *view = viewList.at(0))
                     {
-                        view->ensureVisible(this);
+                        const int xmargin = 50;
+                        const int ymargin = 50;
+
+                        const QRectF viewRect = VMainGraphicsView::SceneVisibleArea(view);
+                        const QRectF itemRect = mapToScene(boundingRect()).boundingRect();
+
+                        // If item's rect is bigger than view's rect ensureVisible works very unstable.
+                        if (itemRect.height() + 2*ymargin < viewRect.height() &&
+                            itemRect.width() + 2*xmargin < viewRect.width())
+                        {
+                             view->ensureVisible(itemRect, xmargin, ymargin);
+                        }
+                        else
+                        {
+                            // Ensure visible only small rect around a cursor
+                            VMainGraphicsScene *currentScene = qobject_cast<VMainGraphicsScene *>(scene());
+                            SCASSERT(currentScene);
+                            const QPointF cursorPosition = currentScene->getScenePos();
+                            view->ensureVisible(QRectF(cursorPosition.x()-5, cursorPosition.y()-5, 10, 10));
+                        }
                     }
                 }
             }

src/libs/vwidgets/vgraphicssimpletextitem.cpp

@@ -36,6 +36,9 @@
 #include <QGraphicsScene>
 #include <QGraphicsView>
 
+#include "vmaingraphicsscene.h"
+#include "vmaingraphicsview.h"
+
 //---------------------------------------------------------------------------------------------------------------------
 /**
  * @brief VGraphicsSimpleTextItem default constructor.
@@ -131,7 +134,26 @@ QVariant VGraphicsSimpleTextItem::itemChange(GraphicsItemChange change, const QV
                 {
                     if (QGraphicsView *view = viewList.at(0))
                     {
-                        view->ensureVisible(this);
+                        const int xmargin = 50;
+                        const int ymargin = 50;
+
+                        const QRectF viewRect = VMainGraphicsView::SceneVisibleArea(view);
+                        const QRectF itemRect = mapToScene(boundingRect()).boundingRect();
+
+                        // If item's rect is bigger than view's rect ensureVisible works very unstable.
+                        if (itemRect.height() + 2*ymargin < viewRect.height() &&
+                            itemRect.width() + 2*xmargin < viewRect.width())
+                        {
+                             view->ensureVisible(itemRect, xmargin, ymargin);
+                        }
+                        else
+                        {
+                            // Ensure visible only small rect around a cursor
+                            VMainGraphicsScene *currentScene = qobject_cast<VMainGraphicsScene *>(scene());
+                            SCASSERT(currentScene);
+                            const QPointF cursorPosition = currentScene->getScenePos();
+                            view->ensureVisible(QRectF(cursorPosition.x()-5, cursorPosition.y()-5, 10, 10));
+                        }
                     }
                 }
             }

src/libs/vwidgets/vmaingraphicsview.cpp

@@ -360,10 +360,7 @@ void VMainGraphicsView::NewSceneRect(QGraphicsScene *sc, QGraphicsView *view)
     SCASSERT(view != nullptr);
 
     //Calculate view rect
-    //to receive the currently visible area, map the widgets bounds to the scene
+    const QRectF viewRect = SceneVisibleArea(view);
-    const QPointF a = view->mapToScene(0, 0);
-    const QPointF b = view->mapToScene(view->width(), view->height());
-    const QRectF viewRect = QRectF( a, b );
 
     //Calculate scene rect
     VMainGraphicsScene *currentScene = qobject_cast<VMainGraphicsScene *>(sc);
@@ -373,3 +370,11 @@ void VMainGraphicsView::NewSceneRect(QGraphicsScene *sc, QGraphicsView *view)
     //Unite two rects
     sc->setSceneRect(itemsRect.united(viewRect));
 }
+
+//---------------------------------------------------------------------------------------------------------------------
+QRectF VMainGraphicsView::SceneVisibleArea(QGraphicsView *view)
+{
+    SCASSERT(view != nullptr);
+    //to receive the currently visible area, map the widgets bounds to the scene
+    return QRectF(view->mapToScene(0, 0), view->mapToScene(view->width(), view->height()));
+}

src/libs/vwidgets/vmaingraphicsview.h

@@ -101,6 +101,7 @@ public:
     void setShowToolOptions(bool value);
 
     static void NewSceneRect(QGraphicsScene *sc, QGraphicsView *view);
+    static QRectF SceneVisibleArea(QGraphicsView *view);
 
 signals:
     /**