Graph edge highlight (#1693)

* Highlight edges to and from current block in graph.

src/widgets/DisassemblerGraphView.cpp

@@ -152,6 +152,8 @@ DisassemblerGraphView::DisassemblerGraphView(QWidget *parent, CutterSeekable* se
     // Add header as widget to layout so it stretches to the layout width
     layout->setContentsMargins(0, 0, 0, 0);
     layout->setAlignment(Qt::AlignTop);
+
+    this->scale_thickness_multiplier = true;
 }
 
 void DisassemblerGraphView::connectSeekChanged(bool disconn)
@@ -601,6 +603,11 @@ GraphView::EdgeConfiguration DisassemblerGraphView::edgeConfiguration(GraphView:
     }
     ec.start_arrow = false;
     ec.end_arrow = true;
+    if (from.entry == currentBlockAddress) {
+        ec.width_scale = 2.0;
+    } else if (to->entry == currentBlockAddress) {
+        ec.width_scale = 2.0;
+    }
     return ec;
 }
 
@@ -922,6 +929,8 @@ void DisassemblerGraphView::blockClicked(GraphView::GraphBlock &block, QMouseEve
         return;
     }
 
+    currentBlockAddress = block.entry;
+
     highlight_token = getToken(instr, pos.x());
 
     RVA addr = instr->addr;
@@ -983,6 +992,7 @@ bool DisassemblerGraphView::helpEvent(QHelpEvent *event)
 
 void DisassemblerGraphView::blockTransitionedTo(GraphView::GraphBlock *to)
 {
+    currentBlockAddress = to->entry;
     if (transition_dont_seek) {
         transition_dont_seek = false;
         return;

src/widgets/DisassemblerGraphView.h

@@ -147,6 +147,7 @@ private:
     int charOffset;
     int baseline;
     bool emptyGraph;
+    ut64 currentBlockAddress = RVA_INVALID;
 
     DisassemblyContextMenu *blockMenu;
     QMenu *contextMenu;

src/widgets/DisassemblyWidget.cpp

@@ -918,9 +918,9 @@ void DisassemblyLeftPanel::paintEvent(QPaintEvent *event)
 
         bool jumpDown = l.arrow > l.offset;
         p.setPen(jumpDown ? penDown : penUp);
-        if (l.offset == currOffset) {
+        if (l.offset == currOffset || l.arrow == currOffset) {
             QPen pen = p.pen();
-            pen.setWidth((penSizePix * 3) / 2);
+            pen.setWidthF((penSizePix * 3) / 2.0);
             p.setPen(pen);
         }
         bool endVisible = true;

src/widgets/GraphView.cpp

@@ -336,8 +336,12 @@ void GraphView::paintGraphCache()
             QPolygonF polyline = recalculatePolygon(edge.polyline);
             EdgeConfiguration ec = edgeConfiguration(block, &blocks[edge.target]);
             QPen pen(ec.color);
-            pen.setWidth(pen.width() / ec.width_scale);
-            if (pen.width() * current_scale < 2) {
+            pen.setStyle(ec.lineStyle);
+            pen.setWidthF(pen.width() * ec.width_scale);
+            if (scale_thickness_multiplier * ec.width_scale > 1.01 && pen.widthF() * current_scale < 2) {
+                pen.setWidthF(ec.width_scale / current_scale);
+            }
+            if (pen.widthF() * current_scale < 2) {
                 pen.setWidth(0);
             }
             p.setPen(pen);

src/widgets/GraphView.h

@@ -38,6 +38,7 @@ public:
         bool start_arrow = false;
         bool end_arrow = true;
         qreal width_scale = 1.0;
+        Qt::PenStyle lineStyle = Qt::PenStyle::SolidLine;
     };
 
     explicit GraphView(QWidget *parent);
@@ -96,6 +97,7 @@ protected:
 
     int width = 0;
     int height = 0;
+    bool scale_thickness_multiplier = false;
 
     void clampViewOffset();
     void setViewOffsetInternal(QPoint pos, bool emitSignal = true);
@@ -125,9 +127,6 @@ private:
     int scroll_base_y = 0;
     bool scroll_mode = false;
 
-    // Todo: remove charheight/charwidth cause it should be handled in child class
-    qreal charWidth = 10.0;
-
     bool useGL;
 
     /**

src/widgets/OverviewView.cpp

@@ -137,7 +137,7 @@ GraphView::EdgeConfiguration OverviewView::edgeConfiguration(GraphView::GraphBlo
     auto baseEcIt = edgeConfigurations.find({from.entry, to->entry});
     if (baseEcIt != edgeConfigurations.end())
         ec = baseEcIt->second;
-    ec.width_scale = getViewScale();
+    ec.width_scale = 1.0 / getViewScale();
     return ec;
 }