From 4fb6dfbd9284d0bf9b3270737b80307e60e18c84 Mon Sep 17 00:00:00 2001
From: Roman Telezhynskyi <dismine@gmail.com>
Date: Sat, 20 Aug 2022 18:50:11 +0300
Subject: [PATCH] Improve visualization for tool Segment an arc.

---
 .../vtools/dialogs/tools/dialogcutarc.cpp     | 53 ++++++++++++++++++-
 src/libs/vtools/dialogs/tools/dialogcutarc.h  |  3 ++
 .../visualization/path/vistoolcutarc.cpp      | 14 +++++
 3 files changed, 68 insertions(+), 2 deletions(-)

diff --git a/src/libs/vtools/dialogs/tools/dialogcutarc.cpp b/src/libs/vtools/dialogs/tools/dialogcutarc.cpp
index 94727c978..68f052879 100644
--- a/src/libs/vtools/dialogs/tools/dialogcutarc.cpp
+++ b/src/libs/vtools/dialogs/tools/dialogcutarc.cpp
@@ -47,6 +47,7 @@
 #include "ui_dialogcutarc.h"
 #include "../vgeometry/varc.h"
 #include "../qmuparser/qmudef.h"
+#include "../vwidgets/vabstractmainwindow.h"
 
 //---------------------------------------------------------------------------------------------------------------------
 /**
@@ -172,8 +173,10 @@ void DialogCutArc::ChosenObject(quint32 id, const SceneObject &type)
                 vis->VisualMode(id);
             }
             prepare = true;
-            this->setModal(true);
-            this->show();
+
+            auto *window = qobject_cast<VAbstractMainWindow *>(VAbstractValApplication::VApp()->getMainWindow());
+            SCASSERT(window != nullptr)
+            connect(vis, &Visualization::ToolTip, window, &VAbstractMainWindow::ShowToolTip);
         }
     }
 }
@@ -354,3 +357,49 @@ auto DialogCutArc::GetAliasSuffix2() const -> QString
 {
     return ui->lineEditAlias2->text();
 }
+
+//---------------------------------------------------------------------------------------------------------------------
+void DialogCutArc::ShowDialog(bool click)
+{
+    if (not prepare)
+    {
+        return;
+    }
+
+    auto FinishCreating = [this]()
+    {
+        vis->SetMode(Mode::Show);
+        vis->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<VArc> arc = data->GeometricObject<VArc>(getArcId());
+        QPointF p = arc->ClosestPoint(scene->getScenePos());
+        qreal len = arc->GetLengthByPoint(p);
+        if (len > 0)
+        {
+            SetFormula(QString::number(FromPixel(len, *data->GetPatternUnit())));
+        }
+
+        FinishCreating();
+    }
+
+    FinishCreating();
+}
diff --git a/src/libs/vtools/dialogs/tools/dialogcutarc.h b/src/libs/vtools/dialogs/tools/dialogcutarc.h
index 0f7b9deb8..a7f398a42 100644
--- a/src/libs/vtools/dialogs/tools/dialogcutarc.h
+++ b/src/libs/vtools/dialogs/tools/dialogcutarc.h
@@ -72,6 +72,7 @@ public:
     void SetAliasSuffix2(const QString &alias);
     auto GetAliasSuffix2() const -> QString;
 
+    void ShowDialog(bool click) override;
 public slots:
     void ChosenObject(quint32 id, const SceneObject &type) override;
     /**
@@ -113,6 +114,8 @@ private:
 
     QString m_originAliasSuffix1{};
     QString m_originAliasSuffix2{};
+
+    bool m_firstRelease{false};
 };
 
 //---------------------------------------------------------------------------------------------------------------------
diff --git a/src/libs/vtools/visualization/path/vistoolcutarc.cpp b/src/libs/vtools/visualization/path/vistoolcutarc.cpp
index c79ed58f3..36f5180c9 100644
--- a/src/libs/vtools/visualization/path/vistoolcutarc.cpp
+++ b/src/libs/vtools/visualization/path/vistoolcutarc.cpp
@@ -42,6 +42,7 @@
 #include "../visualization.h"
 #include "vispath.h"
 #include "../vwidgets/scalesceneitems.h"
+#include "../vmisc/vmodifierkey.h"
 
 //---------------------------------------------------------------------------------------------------------------------
 VisToolCutArc::VisToolCutArc(const VContainer *data, QGraphicsItem *parent)
@@ -75,6 +76,19 @@ void VisToolCutArc::RefreshGeometry()
             DrawPath(m_arc1, ar1.GetPath(), ar1.DirectionArrows(), Qt::darkGreen, lineStyle, Qt::RoundCap);
             DrawPath(m_arc2, ar2.GetPath(), ar2.DirectionArrows(), Qt::darkRed, lineStyle, Qt::RoundCap);
         }
+        else if (mode == Mode::Creation)
+        {
+            QPointF p = arc->ClosestPoint(Visualization::scenePos);
+            qreal length = arc->GetLengthByPoint(p);
+
+            DrawPoint(m_point, p, 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(length), prefix, VModifierKey::EnterKey());
+        }
     }
 }