Improve visualization for tool Point along bisector.

src/libs/vtools/dialogs/tools/dialogbisector.cpp

@@ -343,6 +343,69 @@ auto DialogBisector::GetNotes() const -> QString
     return ui->plainTextEditToolNotes->toPlainText();
 }
 
+//---------------------------------------------------------------------------------------------------------------------
+void DialogBisector::ShowDialog(bool click)
+{
+    if (not prepare)
+    {
+        return;
+    }
+
+    auto *lineVis = qobject_cast<VisToolBisector *>(vis);
+    SCASSERT(lineVis != nullptr)
+
+    auto FinishCreating = [this, lineVis]()
+    {
+        lineVis->SetMode(Mode::Show);
+        lineVis->RefreshGeometry();
+
+        emit ToolTip(QString());
+
+        setModal(true);
+        show();
+    };
+
+    if (click)
+    {
+        // The check need to ignore first release of mouse button.
+        // User can select point by clicking on a label.
+        if (not m_firstRelease)
+        {
+            m_firstRelease = true;
+            return;
+        }
+
+        auto *scene = qobject_cast<VMainGraphicsScene *>(VAbstractValApplication::VApp()->getCurrentScene());
+        SCASSERT(scene != nullptr)
+
+        const QSharedPointer<VPointF> p1 = data->GeometricObject<VPointF>(GetFirstPointId());
+        const QSharedPointer<VPointF> p2 = data->GeometricObject<VPointF>(GetSecondPointId());
+        const QSharedPointer<VPointF> p3 = data->GeometricObject<VPointF>(GetThirdPointId());
+
+        qreal angle = VToolBisector::BisectorAngle(static_cast<QPointF>(*p1),
+                                                   static_cast<QPointF>(*p2),
+                                                   static_cast<QPointF>(*p3));
+
+        QLineF baseLine(static_cast<QPointF>(*p2), static_cast<QPointF>(*p3));
+        baseLine.setAngle(angle);
+
+        QLineF line(static_cast<QPointF>(*p2), scene->getScenePos());
+
+        qreal len = line.length();
+        qreal angleTo = baseLine.angleTo(line);
+        if (angleTo > 90 && angleTo < 270)
+        {
+            len *= -1;
+        }
+
+        SetFormula(QString::number(FromPixel(len, *data->GetPatternUnit())));
+
+        FinishCreating();
+    }
+
+    FinishCreating();
+}
+
 //---------------------------------------------------------------------------------------------------------------------
 void DialogBisector::SaveData()
 {
@@ -379,11 +442,17 @@ void DialogBisector::ChosenThirdPoint(quint32 id)
     {
         if (SetObject(id, ui->comboBoxThirdPoint, QString()))
         {
+            auto *window = qobject_cast<VAbstractMainWindow *>(
+                VAbstractValApplication::VApp()->getMainWindow());
+            SCASSERT(window != nullptr)
+
+            auto *line = qobject_cast<VisToolBisector *>(vis);
+            SCASSERT(line != nullptr)
+            connect(line, &Visualization::ToolTip, window, &VAbstractMainWindow::ShowToolTip);
+
             line->setObject3Id(id);
             line->RefreshGeometry();
             prepare = true;
-            this->setModal(true);
-            this->show();
         }
     }
 }

src/libs/vtools/dialogs/tools/dialogbisector.h

@@ -77,6 +77,8 @@ public:
 
     void SetNotes(const QString &notes);
     auto GetNotes() const -> QString;
+
+    void ShowDialog(bool click) override;
 public slots:
     void ChosenObject(quint32 id, const SceneObject &type) override;
     /**

src/libs/vtools/visualization/line/vistoolbisector.cpp

@@ -40,6 +40,7 @@
 #include "../vpatterndb/vcontainer.h"
 #include "../visualization.h"
 #include "visline.h"
+#include "../vmisc/vmodifierkey.h"
 
 //---------------------------------------------------------------------------------------------------------------------
 VisToolBisector::VisToolBisector(const VContainer *data, QGraphicsItem *parent)
@@ -113,6 +114,36 @@ void VisToolBisector::RefreshGeometry()
 
                     DrawPoint(m_point, mainLine.p2(), mainColor);
                 }
+                else if (mode == Mode::Creation)
+                {
+                    QLineF cursorLine (static_cast<QPointF>(*second), Visualization::scenePos);
+                    QLineF baseLine(static_cast<QPointF>(*second), static_cast<QPointF>(*third));
+
+                    qreal angle = VToolBisector::BisectorAngle(static_cast<QPointF>(*first),
+                                                               static_cast<QPointF>(*second),
+                                                               static_cast<QPointF>(*third));
+
+                    baseLine.setAngle(angle);
+
+                    qreal len = cursorLine.length();
+                    qreal angleTo = baseLine.angleTo(cursorLine);
+                    if (angleTo > 90 && angleTo < 270)
+                    {
+                        len *= -1;
+                    }
+
+                    QLineF mainLine = VGObject::BuildLine(static_cast<QPointF>(*second), len, angle);
+
+                    DrawLine(this, mainLine, mainColor, lineStyle);
+
+                    DrawPoint(m_point, mainLine.p2(), mainColor);
+
+                    const QString prefix = UnitsToStr(VAbstractValApplication::VApp()->patternUnits(), true);
+                    Visualization::toolTip = tr("Length = %1%2; "
+                                                "<b>Mouse click</b> - finish selecting the length, "
+                                                "<b>%3</b> - skip")
+                                                 .arg(NumberToUser(len), prefix, VModifierKey::EnterKey());
+                }
                 else
                 {
                     qreal angle = VToolBisector::BisectorAngle(static_cast<QPointF>(*first),