Fix an wrong positioning of the rect of Overview (#1171)

* Fix an wrong positioning of the rect of Overview

* Fix commenting and a resizing issue

src/widgets/GraphWidget.cpp

@@ -59,6 +59,8 @@ void GraphWidget::toggleOverview(bool visibility)
         connect(graphView->verticalScrollBar(), SIGNAL(valueChanged(int)), this, SLOT(adjustOverview()));
         connect(overviewWidget->graphView, SIGNAL(refreshBlock()), this, SLOT(adjustOffset()));
         connect(overviewWidget->graphView, SIGNAL(mouseMoved()), this, SLOT(adjustGraph()));
+        connect(overviewWidget, &QDockWidget::dockLocationChanged, this, &GraphWidget::adjustOverview);
+        connect(overviewWidget, &OverviewWidget::resized, this, &GraphWidget::adjustOverview);
     } else {
         disconnect(graphView, SIGNAL(refreshBlock()), this, SLOT(adjustOverview()));
         disconnect(graphView, SIGNAL(viewZoomed()), this, SLOT(adjustOverview()));
@@ -66,6 +68,8 @@ void GraphWidget::toggleOverview(bool visibility)
         disconnect(graphView->verticalScrollBar(), SIGNAL(valueChanged(int)), this, SLOT(adjustOverview()));
         disconnect(overviewWidget->graphView, SIGNAL(refreshBlock()), this, SLOT(adjustOffset()));
         disconnect(overviewWidget->graphView, SIGNAL(mouseMoved()), this, SLOT(adjustGraph()));
+        disconnect(overviewWidget, &QDockWidget::dockLocationChanged, this, &GraphWidget::adjustOverview);
+        disconnect(overviewWidget, &OverviewWidget::resized, this, &GraphWidget::adjustOverview);
         disableOverviewRect();
     }
 }
@@ -84,6 +88,8 @@ void GraphWidget::adjustOverview()
     if (!overviewWidget) {
         return;
     }
+    overviewWidget->graphView->h_offset = 0;
+    overviewWidget->graphView->v_offset = 0;
     bool scrollXVisible = graphView->horizontalScrollBar()->isVisible();
     bool scrollYVisible = graphView->verticalScrollBar()->isVisible();
     if (!scrollXVisible && !scrollYVisible) {
@@ -92,25 +98,29 @@ void GraphWidget::adjustOverview()
     }
     qreal x = 0;
     qreal y = 0;
-    qreal w = overviewWidget->graphView->viewport()->width();
-    qreal h = overviewWidget->graphView->viewport()->height();
+    qreal w = graphView->viewport()->width();
+    qreal h = graphView->viewport()->height();
     qreal curScale = overviewWidget->graphView->current_scale;
     qreal baseScale = graphView->current_scale;
 
-    w = graphView->viewport()->width();
-    h = graphView->viewport()->height();
-
+    w *= curScale / baseScale;
+    h *= curScale / baseScale;
     if (scrollXVisible) {
         x = graphView->horizontalScrollBar()->value();
-        w *= curScale / baseScale;
+        x *= curScale;
+    } else {
+        x = (overviewWidget->graphView->viewport()->width() - w) / 2;
+        overviewWidget->graphView->h_offset = x;
     }
 
     if (scrollYVisible) {
         y = graphView->verticalScrollBar()->value();
-        h *= curScale / baseScale;
+        y *= curScale;
+    } else {
+        y = (overviewWidget->graphView->viewport()->height() - h) / 2;
+        overviewWidget->graphView->v_offset = y;
     }
-    x *= curScale;
-    y *= curScale;
+
     overviewWidget->graphView->rangeRect = QRectF(x + overviewWidget->graphView->unscrolled_render_offset_x,
             y + overviewWidget->graphView->unscrolled_render_offset_y, w, h);
     overviewWidget->graphView->viewport()->update();
@@ -123,8 +133,8 @@ void GraphWidget::adjustGraph()
     }
     int x1 = overviewWidget->graphView->horizontalScrollBar()->value();
     int y1 = overviewWidget->graphView->verticalScrollBar()->value();
-    qreal x2 = (overviewWidget->graphView->rangeRect.x() - (qreal)overviewWidget->graphView->unscrolled_render_offset_x)/ overviewWidget->graphView->current_scale;
-    qreal y2 = (overviewWidget->graphView->rangeRect.y() - (qreal)overviewWidget->graphView->unscrolled_render_offset_y)/ overviewWidget->graphView->current_scale;
+    qreal x2 = (overviewWidget->graphView->rangeRect.x() - (qreal)overviewWidget->graphView->unscrolled_render_offset_x) / overviewWidget->graphView->current_scale;
+    qreal y2 = (overviewWidget->graphView->rangeRect.y() - (qreal)overviewWidget->graphView->unscrolled_render_offset_y) / overviewWidget->graphView->current_scale;
 
     graphView->horizontalScrollBar()->setValue(x1 + x2);
     graphView->verticalScrollBar()->setValue(y1 + y2);

src/widgets/OverviewView.cpp

@@ -91,8 +91,8 @@ void OverviewView::mousePressEvent(QMouseEvent *event)
     }
     qreal w = rangeRect.width();
     qreal h = rangeRect.height();
-    qreal x = event->localPos().x() - w/2;
-    qreal y = event->localPos().y() - h/2;
+    qreal x = event->localPos().x() - w/2 + h_offset;
+    qreal y = event->localPos().y() - h/2 + v_offset;
     rangeRect = QRectF(x, y, w, h);
     viewport()->update();
     emit mouseMoved();
@@ -132,6 +132,8 @@ void OverviewView::mouseMoveEvent(QMouseEvent *event)
     if (y <= unscrolled_render_offset_y) {
         y = unscrolled_render_offset_y;
     }
+    x += h_offset;
+    y += v_offset;
     rangeRect = QRectF(x, y, w, h);
     viewport()->update();
     emit mouseMoved();

src/widgets/OverviewView.h

@@ -11,8 +11,8 @@ class OverviewView : public GraphView
     Q_OBJECT
 
 signals:
-    /**
-     * @brief signal when mouse is pressed or moved so that
+    /*
+     * \brief signal when mouse is pressed or moved so that
      * Graph can refresh its contents corresponded with Overview
      */
     void mouseMoved();
@@ -21,13 +21,20 @@ public:
     OverviewView(QWidget *parent);
     ~OverviewView() override;
 
-    /**
-     * @brief a rect on Overview to show where you are on Graph
+    /*
+     * \brief a rect on Overview to show where you are on Graph
      */
     QRectF rangeRect;
 
-    /**
-     * @brief Graph access this function to set minimum set of the data
+    /*
+     * \brief offset for the rect which is put when either of the scrollbar of
+     * Graph is not visible.
+     */
+    qreal h_offset = 0;
+    qreal v_offset = 0;
+
+    /*
+     * \brief Graph access this function to set minimum set of the data
      * @param baseWidth width of Graph when it computed the blocks
      * @param baseHeigh height of Graph when it computed the blocks
      * @param baseBlocks computed blocks passed by Graph
@@ -35,81 +42,81 @@ public:
     void setData(int baseWidth, int baseHeight, std::unordered_map<ut64, GraphBlock> baseBlocks);
 
 public slots:
-    /**
-     * @brief refresh the view and adjust the scale
+    /*
+     * \brief refresh the view and adjust the scale
      */
     void refreshView();
 
 private slots:
-    /**
-     * @brief update Colors.
+    /*
+     * \brief update Colors.
      * for example this will be called when the theme is changed.
      */
     void colorsUpdatedSlot();
 
 protected:
-    /**
-     * @brief mousePressEvent to start moving the rect.
+    /*
+     * \brief mousePressEvent to start moving the rect.
      */
     void mousePressEvent(QMouseEvent *event) override;
-    /**
-     * @brief mouseReleaseEvent to tell not to move the rect anymore.
+    /*
+     * \brief mouseReleaseEvent to tell not to move the rect anymore.
      */
     void mouseReleaseEvent(QMouseEvent *event) override;
-    /**
-     * @brief mouseMoveEvent to move the rect.
+    /*
+     * \brief mouseMoveEvent to move the rect.
      */
     void mouseMoveEvent(QMouseEvent *event) override;
 
 private:
-    /**
-     * @brief this will be handled in mouse events to move the rect properly
+    /*
+     * \brief this will be handled in mouse events to move the rect properly
      * along with the mouse.
      */
     bool mouseActive = false;
 
-    /**
-     * @brief save the initial distance
+    /*
+     * \brief save the initial distance
      * between the point where the mouse was pressed and the point of the rect
      * so as to change the rect point properly along with mouse.
      */
     QPointF initialDiff;
 
-    /**
-     * @brief draw the computed blocks passed by Graph
+    /*
+     * \brief draw the computed blocks passed by Graph
      */
     virtual void drawBlock(QPainter &p, GraphView::GraphBlock &block) override;
 
-    /**
-     * @brief override the edgeConfiguration so as to
+    /*
+     * \brief override the edgeConfiguration so as to
      * adjust the width of the edges by the scale
      * @return EdgeConfiguration
      */
     virtual GraphView::EdgeConfiguration edgeConfiguration(GraphView::GraphBlock &from,
                                                            GraphView::GraphBlock *to) override;
 
-    /**
-     * @brief override the paintEvent to draw the rect on Overview
+    /*
+     * \brief override the paintEvent to draw the rect on Overview
      */
     void paintEvent(QPaintEvent *event) override;
 
-    /**
-     * @brief apply scale properly on the view
+    /*
+     * \brief apply scale properly on the view
      */
     void adjustScale();
 
-    /**
-     * @brief if the mouse is in the rect in Overview.
+    /*
+     * \brief if the mouse is in the rect in Overview.
      */
     bool mouseContainsRect(QMouseEvent *event);
 
-    /**
-     * @brief base background color changing depending on the theme
+    /*
+     * \brief base background color changing depending on the theme
      */
     QColor disassemblyBackgroundColor;
 
-    /**
-     * @brief color for each node changing depending on the theme
+    /*
+     * \brief color for each node changing depending on the theme
      */
     QColor graphNodeColor;
 };

src/widgets/OverviewWidget.cpp

@@ -28,6 +28,7 @@ void OverviewWidget::resizeEvent(QResizeEvent *event)
 {
     graphView->refreshView();
     QDockWidget::resizeEvent(event);
+    emit resized();
 }
 
 void OverviewWidget::updateContents()

src/widgets/OverviewWidget.h

@@ -17,16 +17,22 @@ public:
 
 private:
     RefreshDeferrer *refreshDeferrer;
-    /**
-     * @brief this takes care of scaling the overview when the widget is resized
+    /*
+     * \brief this takes care of scaling the overview when the widget is resized
      */
     void resizeEvent(QResizeEvent *event) override;
 
 private slots:
-    /**
-     * @brief update the overview
+    /*
+     * \brief update the overview
      */
     void updateContents();
+
+signals:
+    /*
+     * \brief emit signal to update the rect
+     */
+    void resized();
 };
 
 #endif // OverviewWIDGET_H