Coincedent points

Canvas.h

@@ -18,7 +18,8 @@ enum class Mode : int
 {
     None = 0,
     DrawingLine = 1,
-    Parallel = 2
+    Parallel = 2,
+    Coincedent = 3
 };
 
 // Óäîáíûé òèï äëÿ õðàíåíèÿ ïàðû ïàðàëëåëüíûõ ëèíèé (ïîðÿäîê íå âàæåí)
@@ -45,6 +46,7 @@ protected:
 private:
     // ====================== Ïîèñê è âûáîð ======================
     Line* findAt(QPointF&);                    // èùåò ëèíèþ ïîä êóðñîðîì
+    Point* findPointAt(QPointF, qreal tolerance = 10.0);
 
     // ====================== Ïàðàëëåëüíîñòü ======================
     LinePair makeOrderedPair(Line* l1, Line* l2);
@@ -59,6 +61,7 @@ private:
     std::set<LinePair> parallelPairs;           // óæå çàïàðàëëåëåííûå ïàðû (çàùèòà îò äóáëåé)
 
     Line* current_line{ nullptr };
+    Point* firstPoint{ nullptr };
     Mode mode{ Mode::None };
 
     int obj_count{ 0 };            // òåã äëÿ íîâûõ îáúåêòîâ